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1. 4-Hydroxyphenylacetic acid oxidation in sulfate and real olive oil mill wastewater by electrochemical advanced processes with a boron-doped diamond anode

Author:
Nelly Flores; Pere Lluís Cabot; Francesc Centellas; José Antonio Garrido; Rosa María Rodríguez; Enric Brillas; Ignasi Sirés
Source:
Journal of hazardous materials 2017 v.321 pp. 566-575
ISSN:
0304-3894
Subject:
anodes; biodegradability; byproducts; cathodes; electrochemistry; hydrogen peroxide; hydroxyl radicals; iron; mineralization; olive oil mills; oxidants; oxidation; pH; photosensitivity; sodium sulfate; ultraviolet radiation; wastewater
Abstract:
... The degradation of 4-hydroxyphenylacetic acid, a ubiquitous component of olive oil mill wastewater (OOMW), has been studied by anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF). Experiments were performed in either a 0.050M Na2SO4 solution or a real OOMW at pH 3.0, using a cell with a boron-doped diamond (BDD) anode and an air-diffusion cathod ...
DOI:
10.1016/j.jhazmat.2016.09.057

2. 5-Selenocyanatouracil: A Potential Hypoxic Radiosensitizer. Electron Attachment Induced Formation of Selenium Centered Radical

Author:
Sosnowska Marta; Makurat Samanta; Zdrowowicz Magdalena; Rak Janusz
Source:
Journal of physical chemistry 2017 v.121 no.25 pp. 6139-6147
ISSN:
1520-5207
Subject:
DNA; Gibbs free energy; X-radiation; acetic acid; activation energy; chlorides; crosslinking; cytotoxicity; energy; high performance liquid chromatography; hydroxyl radicals; selenium; uracil
Abstract:
... The propensity of 5-selenocyanatouracil (SeCNU) to decomposition induced by attachment of electron was scrutinized with the G3B3 composite quantum-chemical method and radiolytic studies. Favorable thermodynamic (Gibbs free reaction energy of −13.65 kcal/mol) and kinetic (Gibbs free activation energy of 1.22 kcal/mol) characteristics revealed by the G3B3 free energy profile suggest SeCNU to be sens ...
DOI:
10.1021/acs.jpcb.7b03633

3. ATP-mediated intrinsic peroxidase-like activity of Fe3O4-based nanozyme: One step detection of blood glucose at physiological pH

Author:
N.V. Srikanth Vallabani; Ajay S. Karakoti; Sanjay Singh
Source:
Colloids and surfaces 2017 v.153 pp. 52-60
ISSN:
0927-7765
Subject:
adenosine triphosphate; blood glucose; blood serum; colloids; colorimetry; detection limit; electron transfer; glucose; humans; hydrogen peroxide; hydroxyl radicals; magnetite; nanoparticles; oxidation; pH; peroxidase; temperature
Abstract:
... Fe3O4 nanoparticles (Fe3O4 NPs), demonstrating peroxidase-like activity has garnered attention in the detection of several biomolecules, therefore, emerged as an excellent nano-biosensing agent. The intrinsic peroxidase-like activity of Fe3O4 NPs at acidic pH is the fundamental action driving the oxidation of substrates like TMB, resulting in a colorimetric product formation used in the detection ...
DOI:
10.1016/j.colsurfb.2017.02.004

4. Abatement of Sorbed Crude Oil by Heterogeneous Fenton Process Using A Contaminated Soil Pre-Impregnated with Dissolved Fe(II) and Humic Acid

Author:
Jinlan Xu; Xiumin Li; Tinglin Huang
Source:
Soil & sediment contamination 2017 v.26 no.2 pp. 195-209
ISSN:
1549-7887
Subject:
humic acids; hydrogen peroxide; hydroxyl radicals; iron; oxidation; oxygen production; pH; petroleum; polluted soils; response surface methodology
Abstract:
... Dissolved Fe(II) and humic acid (HA) were pre-impregnated into contaminated soil to catalyze hydrogen peroxide to remove crude oil (CO). The effects of parameters such as initial Fe(II), HA and H ₂O ₂ concentrations on the oxidation of total petroleum hydrocarbon (TPH) were investigated using response surface methodology based on Box–Behnken design. The rate of hydrogen peroxide decomposition is d ...
DOI:
10.1080/15320383.2017.1269721

5. Achieving highly promoted visible-light sensitive photocatalytic activity on BiOIO3 via facile iodine doping

Author:
Hongwei Huang; Hongling Ou; Jingwen Feng; Xin Du; Yihe Zhang
Source:
Colloids and surfaces 2017 v.518 pp. 158-165
ISSN:
0927-7757
Subject:
azo dyes; hydroxyl radicals; iodine; lighting; methyl orange; photocatalysis; photocatalysts; photolysis; superoxide anion
Abstract:
... Visible-light active photocatalytic performance of a layered bismuth-based photocatalyst BiOIO3 was achieved by iodine ion doping through a facile hydrothermal process. Compared to pure BiOIO3, the light responsive range of BiOIO3 is drastically extended from UV to visible light, and the adjustable band gap is also achieved. The photocatalytic experiments revealed that I-doped BiOIO3 displays sign ...
DOI:
10.1016/j.colsurfa.2017.01.045

6. Activated carbon from kraft lignin: A sorbent for in situ remediation of contaminated sediments

Author:
Åsa Gustafsson; Sarah Hale; Gerard Cornelissen; Elisabeth Sjöholm; Jonas S. Gunnarsson
Source:
Environmental technology & innovation 2017 v.7 pp. 160-168
ISSN:
2352-1864
Subject:
activated carbon; bioavailability; biomass; coal; coconuts; digestive system; environmental technology; hardwood; hydroxyl radicals; invertebrates; lignin; paper pulp; polycyclic aromatic hydrocarbons; potassium hydroxide; prices; pyrolysis; remediation; samplers; sediment contamination; sediments; softwood; solubilization; sorbents; sorption; surface area; waste liquors
Abstract:
... A new type of activated carbon derived from Kraft lignin, separated from black liquor in the paper pulp process, was evaluated for its use as an alternative sorbent to commercial powdered activated carbons (AC) from anthracite (ACCOAL) or coconut (ACBIO) for remediation in situ of contaminated sediments. Two types of kraft lignins (KL): (1) softwood (SKL), (2) hardwood (HKL) were first evaluated f ...
DOI:
10.1016/j.eti.2016.11.001

7. Activation of peroxymonosulfate by surfactants as the metal-free catalysts for organic contaminant removal

Author:
Qing Yue; Yuyuan Yao; Lianshun Luo; Tao Hu; Liang Shen
Source:
Environmental science and pollution research international 2017 v.24 no.33 pp. 26069-26078
ISSN:
0944-1344
Subject:
ammonium; anions; bromides; catalysts; catalytic activity; cationic surfactants; cetyltrimethylammonium bromide; electron paramagnetic resonance spectroscopy; electrostatic interactions; hydroxyl radicals; methanol; micelles; oxidation; pollutants; wastewater treatment
Abstract:
... The present work described that tertiary ammonium surfactants containing bromide ion as novel metal-free catalysts were innovatively coupled with peroxymonosulfate (PMS) to build a simple catalytic oxidation system, possessing outstanding catalytic ability with organic dye Reactive Red M-3BE (RR M-3BE) as the target pollutant. Furthermore, cetyltrimethylammonium bromide (CTAB), a representative of ...
DOI:
10.1007/s11356-017-0210-0

8. Activation of sodium persulfate by magnetic carbon xerogels (CX/CoFe) for the oxidation of bisphenol A: Process variables effects, matrix effects and reaction pathways

Author:
Alexandra Outsiou; Zacharias Frontistis; Rui S. Ribeiro; Maria Antonopoulou; Ioannis K. Konstantinou; Adrián M.T. Silva; Joaquim L. Faria; Helder T. Gomes; Dionissios Mantzavinos
Source:
Water research 2017 v.124 pp. 97-107
ISSN:
0043-1354
Subject:
bisphenol A; byproducts; carbon; catalysts; chlorides; chromatography; cobalt; drinking water; free radicals; groundwater; humic acids; hydroxyl radicals; iron; mass spectrometry; models; oxidation; pH; sodium; sulfates; surface water; wastewater
Abstract:
... An advanced oxidation process comprising sodium persulfate (SPS) and a novel magnetic carbon xerogel was tested for the degradation of bisphenol A (BPA), a model endocrine-disrupting compound. The catalyst, consisting of interconnected carbon microspheres with embedded iron and cobalt microparticles, was capable of activating persulfate to form sulfate and hydroxyl radicals at ambient conditions.T ...
DOI:
10.1016/j.watres.2017.07.046

9. Active oxygen species metabolism in neem (Azadirachta indica) seeds exposed to natural ageing and controlled deterioration

Author:
Alok Kumar Sahu; Balram Sahu; Avinash Soni; Subhash Chandra Naithani
Source:
Acta physiologiae plantarum 2017 v.39 no.9 pp. 197
ISSN:
0137-5881
Subject:
Azadirachta indica; DNA; DNA damage; active oxygen species; catalase; correlation; electrolytes; germination; germplasm; hydrogen peroxide; hydroxyl radicals; isozymes; metabolism; seed storage; seeds; superoxide dismutase; trade; vigor
Abstract:
... Success of ex situ storage of germplasm for trade and conservation essentially depends upon the precision of the protocol employed for the assessment of germination potential. Active oxygen species and antioxidative enzymes during natural ageing (NA) and controlled deterioration (CD) was monitored during the loss of seed vigour and germination potential in neem seeds showing intermediate seed stor ...
DOI:
10.1007/s11738-017-2494-6

10. Acute effects of fine particulate matter constituents on mortality: A systematic review and meta-regression analysis

Author:
Souzana Achilleos; Marianthi-Anna Kioumourtzoglou; Chih-Da Wu; Joel D. Schwartz; Petros Koutrakis; Stefania I. Papatheodorou
Source:
Environment international 2017 pp. -
ISSN:
0160-4120
Subject:
acute effects; acute exposure; air temperature; carbon; combustion; databases; elderly; epidemiological studies; health effects assessments; hydroxyl radicals; meta-analysis; models; mortality; particulates; population density; potassium; regression analysis; risk; risk estimate; systematic review; vegetation
Abstract:
... The link between PM2.5 exposure and adverse health outcomes is well documented from studies across the world. However, the reported effect estimates vary across studies, locations and constituents. We aimed to conduct a meta-analysis on associations between short-term exposure to PM2.5 constituents and mortality using city-specific estimates, and explore factors that may explain some of the observ ...
DOI:
10.1016/j.envint.2017.09.010
PubMed:
28988023
PubMed Central:
PMC5689473

11. Advanced treatment of municipal secondary effluent by catalytic ozonation using Fe3O4-CeO2/MWCNTs as efficient catalyst

Author:
Zhiyong Bai; Jianlong Wang; Qi Yang
Source:
Environmental science and pollution research international 2017 v.24 no.10 pp. 9337-9349
ISSN:
0944-1344
Subject:
alkalinity; catalysts; chemical oxygen demand; humic acids; hydroxyl radicals; ozonation; ozone; pollutants; polysaccharides; proteins
Abstract:
... The advanced treatment of municipal secondary effluent was performed by catalytic ozonation using Fe₃O₄-CeO₂/MWCNTs as catalyst. The experimental results showed that in catalytic ozonation system, the removal efficiency of soluble COD was more than 46% after 30 min reaction, and about 36% of effluent organic matters (EfOMs) were mineralized, which was four times higher than that in single ozonatio ...
DOI:
10.1007/s11356-017-8619-z

12. Amino Acid: Its Dual Role as Nutrient and Scavenger of Free Radicals in Soil

Author:
Rahul Datta; Divyashri Baraniya; Yong-Feng Wang; Aditi Kelkar; Ram Swaroop Meena; Gulab Singh Yadav; Maria Teresa Ceccherini; Pavel Formanek
Source:
Sustainability 2017 v.9 no.8 pp. -
ISSN:
2071-1050
Subject:
acid soils; amino acids; antibacterial properties; ascorbic acid; bacterial growth; decarboxylation; forest soils; free radicals; hydrogen peroxide; hydroxyl radicals; reducing sugars; soil composition; soil microorganisms; soil respiration
Abstract:
... Ascorbic acid is a bacteriostatic agent; one of the many ways by which ascorbic acid hampers bacterial growth is by the production of hydrogen peroxide, which further converts into hydroxyl free radicals. Certain amino acids can counteract the inhibitory effect of hydroxyl free radicals by checking their oxidizing effect. Though ascorbic acid is bacteriostatic in nature, it facilitates prokaryotic ...
DOI:
10.3390/su9081402

13. Amoebicidal, antimicrobial and in vitro ROS scavenging activities of Tunisian Rubus ulmifolius Schott, methanolic extract

Author:
Soumaya Hajaji; Mohamed Amine Jabri; Ines Sifaoui; Atteneri López-Arencibia; María Reyes-Batlle; Fatma B'chir; Basilio Valladares; José E. Pinero; Jacob Lorenzo-Morales; Hafidh Akkari
Source:
Experimental parasitology 2017 pp. -
ISSN:
0014-4894
Subject:
Acanthamoeba; Escherichia coli; Gram-negative bacteria; Rubus inermis; antibacterial properties; ascorbic acid; bacterial infections; hydrogen peroxide; hydroxyl radicals; inhibitory concentration 50; minimum inhibitory concentration; oxidative stress
Abstract:
... The present study aimed to evaluate the activity of methanolic extract of Rubus ulmifolius Schott against the Acanthamoeba castellani Neff Strain as well as its antioxidant and antimicrobial effects. The tested extract has a good amoebicidal activity with low IC50 (61.785 ± 1.322 μg/ml) and also has significant activity against both Gram-positive (S. aureus, S. agalactiae) and Gram-negative bacter ...
DOI:
10.1016/j.exppara.2017.09.013

14. Amphimedonoic acid and psammaplysene E, novel brominated alkaloids from Amphimedon sp.

Author:
Pierre-Eric Campos; Jean-Luc Wolfender; Emerson F. Queiroz; Laurence Marcourt; Ali Al-Mourabit; Nicole De Voogd; Bertrand Illien; Anne Gauvin-Bialecki
Source:
Tetrahedron letters 2017 v.58 pp. 3901-3904
ISSN:
0040-4039
Subject:
Amphimedon; alkaloids; chemical reactions; chemical structure; hydroxyl radicals; nuclear magnetic resonance spectroscopy
Abstract:
... Examination of the CH2Cl2-MeOH (1:1) extract from the Madagascan sponge Amphimedon sp. highlighted two new brominated alkaloids, amphimedonoic acid (1) and psammaplysene E (2), along with the known 3,5-dibromo-4-methoxybenzoic acid (3). Their structures were elucidated by 1D and 2D NMR spectroscopy and HRESIMS data. ...
DOI:
10.1016/j.tetlet.2017.08.072

15. Annexin V-Conjugated Mixed Micelles as a Potential Drug Delivery System for Targeted Thrombolysis

Author:
Pan Yang; Ren Xiaoting; Wang Shuang; Li Xin; Luo Xianglin; Yin Zongning
Source:
Biomacromolecules 2017 v.18 no.3 pp. 865-876
ISSN:
1526-4602
Subject:
adverse effects; biodegradability; blood coagulation; carotid arteries; chemical elements; drugs; fluorescence; hydroxyl radicals; micelles; nanocarriers; phosphatidylserines; polymerization; polymers; tomography
Abstract:
... To alleviate the hemorrhagic side effect of thrombolysis therapy, a thrombus targeted drug delivery system based on the specific affinity of Annexin V to phosphatidylserine exposed on the membrane surface of activated platelet was developed. The amphiphilic and biodegradable biomaterial, polycaprolactone-block-poly(2-(dimethylamino)ethyl methacrylate)-block-poly(2-hydroxyethyl methacrylate) (PCL-b ...
DOI:
10.1021/acs.biomac.6b01756

16. Antidiabetic, antioxidant and anti inflammatory properties of water and n-butanol soluble extracts from Saharian Anvillea radiata in high-fat-diet fed mice

Author:
Chouaib Kandouli; Mathieu Cassien; Anne Mercier; Caroline Delehedde; Emilie Ricquebourg; Pierre Stocker; Mourad Mekaouche; Zineb Leulmi; Aicha Mechakra; Sophie Thétiot-Laurent; Marcel Culcasi; Sylvia Pietri
Source:
Journal of ethnopharmacology 2017 v.207 pp. 251-267
ISSN:
0378-8741
Subject:
2,2-diphenyl-1-picrylhydrazyl; Anvillea; aerial parts; alpha-amylase; alpha-glucosidase; animal disease models; antioxidant activity; biochemical pathways; blood; blood glucose; butanol; chemiluminescence; copper; diabetes; dose response; electron paramagnetic resonance spectroscopy; ethyl acetate; fibroblasts; flavonoids; freeze drying; glycemic effect; high fat diet; humans; hydroxyl radicals; hyperglycemia; indigenous peoples; insulin; insulin resistance; islets of Langerhans; lipoproteins; liver; metformin; mice; muscles; neoplasm cells; neoplasms; obesity; oxidation; oxidative stress; protective effect; rats; respiratory tract diseases; skeletal muscle; therapeutics; toxicity; traditional medicine; weight control; xanthine oxidase
Abstract:
... According to Saharian traditional medicine, Anvillea radiata Coss. & Dur. (Asteraceae) has been valued for treating a variety of ailments such as gastro-intestinal, liver and pulmonary diseases, and has gained awareness for its beneficial effect on postprandial hyperglycemia. However, to best of our knowledge, no detailed study of the antidiabetic curative effects of this plant has been conducted ...
DOI:
10.1016/j.jep.2017.06.042

17. Antimicrobial and antioxidant activities of Saccharomyces cerevisiae IFST062013, a potential probiotic

Author:
Md. Fakruddin; Md. Nur Hossain; Monzur Morshed Ahmed
Source:
BMC complementary and alternative medicine 2017 v.17 no.1 pp. 64
ISSN:
1472-6882
Subject:
Artemia; Gram-negative bacteria; Saccharomyces cerevisiae; acute toxicity; alpha-amylase; alternative medicine; ampicillin; animal models; antibacterial properties; antioxidant activity; bile salts; biofilm; carboxylic ester hydrolases; cellulose; cholesterol; cytokines; cytotoxicity; deoxyribonucleases; galactosidases; gastric juice; gentamicin; glutathione; hydrophobicity; hydroxyl radicals; lymphocyte proliferation; lysozyme; mice; nalidixic acid; nitric oxide; pH; probiotics; scientists; siderophores; sodium chloride; temperature; toxicity testing; trypsin; vitamin B12; yeasts
Abstract:
... BACKGROUND: Probiotic yeast has become a field of interest to scientists in recent years. METHODS: Conventional cultural method was employed to isolate and identify yeast and standard methods were used to determine different probiotic attributes, antimicrobial and antioxidant properties. RESULTS: This study reports potential probiotic properties of a strain of S. cerevisiae IFST 062013 isolated fr ...
DOI:
10.1186/s12906-017-1591-9
PubMed:
28109187
PubMed Central:
PMC5251302

18. Antioxidant Activities of Chicken Peptide‐Maillard Reaction Products (CP‐MRPS) Derived from Chicken Peptides and d‐Glucose System

Author:
Weidong Bai; Qin Wang; Xiaofang Zeng; Jiayin Fu; Yaoru Liu; Hao Dong
Source:
Journal of food processing and preservation 2017 v.41 no.2 pp. -
ISSN:
0145-8892
Subject:
2,2-diphenyl-1-picrylhydrazyl; Maillard reaction products; antioxidant activity; chickens; color; glucose; hydroxyl radicals; iron; odors; peptides; processed foods; taste; temperature
Abstract:
... Chicken peptide‐Maillard reaction products (CP‐MRPs) were prepared by Maillard reaction (MR) process of chicken peptide and antioxidant activity of CP‐MRPs was evaluated by means of reducing power, DPPH radical scavenging activity, hydroxyl radical scavenging activity and chelating activity on ferrous ion. Meanwhile, the effects of MR conditions (e.g., concentration, reaction time, ratio of glucos ...
DOI:
10.1111/jfpp.13041

19. Antioxidant Activities of Lactic Acid Bacteria for Quality Improvement of Fermented Sausage

Author:
Yulong Zhang; Ping Hu; Lijiao Lou; Jianlong Zhan; Min Fan; Dan Li; Qianwei Liao
Source:
Journal of food science 2017 v.82 no.12 pp. 2960-2967
ISSN:
0022-1147
Subject:
2,2-diphenyl-1-picrylhydrazyl; Lactobacillus curvatus; Lactobacillus paracasei; antioxidant activity; catalase; cell culture; enzyme activity; fermentation; fermented sausages; hydroxyl radicals; lactic acid bacteria; livestock and meat industry; models; nitrites; pH; peroxidation; sensory properties; superoxide dismutase; water activity; water content
Abstract:
... Lactobacillus curvatus (SR6) and Lactobacillus paracasei (SR10‐1) were assessed for their antioxidant activities and inoculated into sausages to investigate their effects on quality during fermentation. The results showed that L. curvatus SR6 had better DPPH• scavenging activity (59.67% ± 6.68%) and reducing power (47.31% ± 4.62%) and L. paracasei SR10‐1 had better OH• scavenging activity (285.67% ...
DOI:
10.1111/1750-3841.13975

20. Antioxidant Activities of Peptoid-Grafted Chitosan Films

Author:
P-H. Elchinger; C. Delattre; S. Faure; O. Roy; S. Badel; T. Bernardi; P. Michaud; C. Taillefumier
Source:
Applied biochemistry and biotechnology 2017 v.181 no.1 pp. 283-293
ISSN:
0273-2289
Subject:
2,2-diphenyl-1-picrylhydrazyl; antioxidant activity; chitosan; hydroxyl radicals
Abstract:
... The aim of this study was to investigate the possibility of immobilizing peptoid on chitosan film in order to generate new active material. Chitosan films have been grafted for the first time with short-length peptoid oligomers displaying antioxidant activities. The antioxidant activity of the selected peptoids was initially investigated with the DPPH assay and hydroxyl radical procedure. The meta ...
DOI:
10.1007/s12010-016-2212-7

21. Antioxidant activities and phenolic profile of Baccharis trimera, a commonly used medicinal plant from Brazil

Author:
S.M. Sabir; M.L. Athayde; A.A. Boligon; J.B.T. Rocha
Source:
South African journal of botany 2017 v.113 pp. 318-323
ISSN:
0254-6299
Subject:
2,2-diphenyl-1-picrylhydrazyl; Baccharis genistelloides subsp. crispa; antioxidant activity; ascorbic acid; brain; catalase; egg yolk; food intake; free radical scavengers; gallic acid; glutathione; high performance liquid chromatography; hydroxyl radicals; inhibitory concentration 50; lipid peroxidation; liver; medicinal plants; mice; nitroprusside; oxidative stress; phospholipids; quercetin; rats; rutin; thiobarbituric acid-reactive substances; Brazil
Abstract:
... The infusions of Baccharis trimera (Asteraceae) are traditionally used in Brazil as a tea to treat liver disorders. It is one of the major constituents in herbal formulations used for the treatment of liver disorders and other diseases. The present study was therefore, aimed to evaluate the potential in vitro and in vivo antioxidant activities and phenolic profile of Baccharis trimera. High perfor ...
DOI:
10.1016/j.sajb.2017.09.010

22. Antioxidant activities of chicken bone peptide fractions and their Maillard reaction products: Effects of different molecular weight distributions

Author:
Xiaohua Nie; Dan Xu; Liming Zhao; Xianghe Meng
Source:
International journal of food properties 2017 v.20 no.sup1 pp. S457
ISSN:
1094-2912
Subject:
2,2-diphenyl-1-picrylhydrazyl; Maillard reaction products; antioxidant activity; aqueous solutions; chickens; galactose; glycation; hydroxyl radicals; molecular weight; protein hydrolysates
Abstract:
... Chicken bone protein hydrolysate (CBPH) and its peptide fractions (CBPH-I, molecular weight < 3 kDa; CBPH-II, molecular weight 3–10 kDa) were heated with galactose in aqueous solution at 100°C for 90 min. Antioxidant activities of CBPH, CBPH-I, CBPH-II, and their derived Maillard reaction products (MRPs) were evaluated. CBPH, peptide fractions, and their MRP exerted strong DPPH radical scavenging ...
DOI:
10.1080/10942912.2017.1299176

23. Antioxidant activity of inulin derivatives with quaternary ammonium

Author:
Yuan Chen; Jingjing Zhang; Wenqiang Tan; Gang Wang; Fang Dong; Qing Li; Zhanyong Guo
Source:
Stärke = 2017 v.69 no.11-12 pp. -
ISSN:
0038-9056
Subject:
ammonium; antioxidant activity; chlorides; hydroxyl radicals; inulin; superoxide anion
Abstract:
... Three inulin derivatives with quaternary ammonium, including 2‐(N,N,N‐triethylamine)acetyl inulin chloride (TAIL), 2‐imidazoleacetyl inulin chloride (IAIL), and 2‐(1‐methylimidazole)acetyl inulin chloride (MIAIL) were synthesized via reaction of chloracetyl inulin (CAIL) with tertiary amine. Their antioxidant activity against hydroxyl radicals and superoxide radicals were evaluated in vitro, respe ...
DOI:
10.1002/star.201700046

24. Antioxidant activity of various oral Lactobacillus strains

Author:
A. Chooruk; S. Piwat; R. Teanpaisan
Source:
Journal of applied microbiology 2017 v.123 no.1 pp. 271-279
ISSN:
1364-5072
Subject:
2,2-diphenyl-1-picrylhydrazyl; Lactobacillus fermentum; antioxidant activity; free radical scavengers; glutathione; humans; hydrogen peroxide; hydroxyl radicals; linoleic acid; oxidative stress; peroxidation; superoxide dismutase
Abstract:
... AIMS: This study aims to evaluate the antioxidant activity of oral Lactobacillus strains in vitro. METHODS AND RESULTS: A total of 201 Lactobacillus strains were investigated for antioxidant activities: free radical scavenging (DPPH), inhibition of linoleic acid peroxidation (TAALA), superoxide dismutase (SOD) and glutathione (GSH). Resistance to reactive oxygen species was also assessed. Results ...
DOI:
10.1111/jam.13482

25. Antioxidant and anti-cancer activities of proanthocyanidins-rich extracts from three varieties of sorghum (Sorghum bicolor) bran

Author:
Yingying Zhu; Zhenxing Shi; Yang Yao; Yuqiong Hao; Guixing Ren
Source:
Food and agricultural immunology 2017 v.28 no.6 pp. 1530-1543
ISSN:
1465-3443
Subject:
Sorghum bicolor; antineoplastic activity; bran; cell movement; hepatoma; humans; hydroxyl radicals; mitogen-activated protein kinase; neoplasm cells; oxygen; proanthocyanidins
Abstract:
... Hepatocellular carcinoma is the fifth frequently diagnosed cancer in humans. Proanthocyanidins was reported to be an excellent dietary botanical supplement for its antioxidant and anticancer effects. In this study, proanthocyanidins-rich extracts (PREs) were prepared from three varieties (Jinza No. 12, Jinza No. 15 and Jinza No. 18) of sorghum bran. Their proanthocyanidins profiles were characteri ...
DOI:
10.1080/09540105.2017.1351526

26. Antioxidant and anti-dyslipidemic effects of polysaccharidic extract from sea cucumber processing liquor

Author:
Hang Qi; Xiaolin Ji; Shan Liu; Dingding Feng; Xiufang Dong; Baoyu He; Janaswamy Srinivas; Chenxu Yu
Source:
Electronic Journal of Biotechnology 2017 v.28 pp. 1-6
ISSN:
0717-3458
Subject:
2,2-diphenyl-1-picrylhydrazyl; Holothuroidea; antioxidant activity; biotechnology; blood serum; catalase; electroosmosis; free radicals; fucose; glucose; high density lipoprotein cholesterol; high fat diet; hydrolysis; hydroxyl radicals; hyperlipidemia; ingredients; malondialdehyde; mannose; mice; nutritive value; polysaccharides; proteinases; seafoods; superoxide dismutase; triacylglycerols; wastes
Abstract:
... Sea cucumber is a seafood of high nutritional value. During its processing, sea cucumber processing liquor is routinely produced, which is usually discarded as waste. The chemical composition of this processing liquor is similar to sea cucumbers themselves. Hence, valuable ingredients, such as functional polysaccharides, could be obtained from them.Biologically active polysaccharides from sea cucu ...
DOI:
10.1016/j.ejbt.2017.04.001

27. Antioxidant and free radical scavenging activities of taxoquinone, a diterpenoid isolated from Metasequoia glyptostroboides

Author:
V.K. Bajpai; K.-H. Baek; S.C. Kang
Source:
South African journal of botany 2017 v.111 pp. 93-98
ISSN:
0254-6299
Subject:
2,2-diphenyl-1-picrylhydrazyl; Metasequoia glyptostroboides; antioxidant activity; ascorbic acid; diterpenoids; drugs; ethyl acetate; free radical scavengers; free radicals; hydroxyl radicals; models; nitric oxide; secondary metabolites
Abstract:
... Nowadays, there is an upsurge of interest on finding effective phyto-constituents as new sources of natural antioxidants for using in food and pharmaceutical preparations. However, this study was carried out to investigate the antioxidant and free radical scavenging efficacy of a biologically active diterpenoid compound taxoquinone isolated from Metasequoia glyptostroboides in various antioxidant ...
DOI:
10.1016/j.sajb.2017.03.004

28. Antioxidant capacity of Maillard reaction products’ fractions with different molecular weight distribution from chicken bone hydrolysate – galactose system

Author:
Xiaohua Nie; Liming Zhao; Joe M. Regenstein; Dan Xu; Xianghe Meng
Source:
International journal of food science & technology 2017 v.52 no.7 pp. 1632-1638
ISSN:
0950-5423
Subject:
2,2-diphenyl-1-picrylhydrazyl; Maillard reaction products; absorbance; antioxidant activity; chickens; fluorescence; galactose; hydrolysates; hydroxyl radicals; molecular weight; pH; spectral analysis; ultrafiltration
Abstract:
... Maillard reaction products (MRP) were prepared from an aqueous chicken bone hydrolysate (CBPH) – galactose systems by heating at 100 °C for up to 7.5 h without pH control, and then separated into the <3‐, 3‐ to 10‐ and >10‐kDa fractions using ultrafiltration. Antioxidant capacity and spectral properties of these MRP fractions were studied. The scavenging activity towards DPPH and hydroxyl radicals ...
DOI:
10.1111/ijfs.13445

29. Antioxidant ofsmallmolecular weightchitosan oligosaccharidein vitro

Author:
Kong Shang; Cao Peiqiu; Guo Jiao; Su Zhengquan
Source:
BIO web of conferences 2017 v.8 pp. 01028
ISSN:
2117-4458
Subject:
chitosan; dietary supplements; free radicals; humans; hydroxyl radicals; oligosaccharides; superoxide anion
Abstract:
... In recent years, there has been increasing interest in finding natural antioxidants, since they can protect the human body from free radicals and retard the progress of many chronic diseases. This study is to evaluate antioxidant of a certain molecular chitosan oligosaccharide (Mw 1000 Da, COST) in vitro. The antioxidant activities of COST were investigated in vitro by several antioxidant assays, ...
DOI:
10.1051/bioconf/20170801028

30. Antioxidant properties of Ferulago angulata and its hepatoprotective effect against N-nitrosodimethylamine-induced oxidative stress in rats

Author:
Hatice Kiziltas; Suat Ekin; Mahire Bayramoglu; Esvet Akbas; Gokhan Oto; Serkan Yildirim; Fevzi Ozgokce
Source:
Pharmaceutical biology 2017 v.55 no.1 pp. 888-897
ISSN:
1744-5116
Subject:
2,2-diphenyl-1-picrylhydrazyl; Apiaceae; N-nitrosodimethylamine; albino; alpha-tocopherol; amines; antioxidant activity; antioxidant enzymes; ascorbic acid; dietary minerals; flavonoids; flowers; hepatoprotective effect; histopathology; hydroxyl radicals; inhibitory concentration 50; laboratory animals; liver; liver diseases; methanol; oxidative stress; rats; sodium chloride; therapeutics; vitamin A
Abstract:
... Context: Ferulago angulata (Schlecht.) Boiss. (Apiaceae) (FASB) is used to treat liver diseases and has been used both as food and therapeutics by many cultures for thousands of years because of the natural antioxidant compounds. Objective: This study determines antioxidant properties of FASB flowers, the levels of minerals and vitamins, and also, evaluates the hepatoprotective effect of flowers a ...
DOI:
10.1080/13880209.2016.1270974
PubMed:
28142310
PubMed Central:
PMC6130605

31. Antioxidant status and gut microbiota change in an aging mouse model as influenced by exopolysaccharide produced by Lactobacillus plantarum YW11 isolated from Tibetan kefir

Author:
Jian Zhang; Xiao Zhao; Yunyun Jiang; Wen Zhao; Ting Guo; Yongqiang Cao; Junwei Teng; Xiaona Hao; Juan Zhao; Zhennai Yang
Source:
Journal of dairy science 2017 v.100 no.8 pp. 6025-6041
ISSN:
0022-0302
Subject:
Flexispira; Lactobacillus plantarum; animal models; antioxidant activity; blood serum; catalase; correlation; exopolysaccharides; galactose; glutathione peroxidase; hydroxyl radicals; in vitro studies; intestinal microorganisms; intestines; iron; kefir; malondialdehyde; mice; nitrogen oxides; oxidative stress; phenotype; phylotype; prediction; probiotics; sequence analysis; short chain fatty acids; superoxide anion; superoxide dismutase
Abstract:
... This study investigated the effect of exopolysaccharide (EPS) produced by Lactobacillus plantarum YW11 on the oxidative status and gut microbiota in an aging mouse model induced with d-galactose. The in vitro assay of the antioxidant activity of the EPS showed concentration-dependent (0.25–3.0 mg/mL) activities. At 3.0 mg/mL, the EPS reached the highest scavenging activities with half maximal inhi ...
DOI:
10.3168/jds.2016-12480

32. Antioxidative Activity, Mycochemical, and Phenolic Profile of Termitomyces clypeatus, a Wild Edible Mushroom from the Lateritic Zone of West Bengal

Author:
Payel Mitra; Narayan Chandra Mandal; Krishnendu Acharya
Source:
Journal of herbs, spices & medicinal plants 2017 v.23 no.1 pp. 1-8
ISSN:
1540-3580
Subject:
2,2-diphenyl-1-picrylhydrazyl; Termitomyces; antioxidant activity; ascorbic acid; flavonoids; high performance liquid chromatography; hydroxyl radicals; lycopene; mushrooms; pyrogallol; superoxide anion; India
Abstract:
... The antioxidant properties, mycochemical, and phenolic profiling of Termitomyces clypeatus , an edible mushroom from the lateritic region of West Bengal, India, was done. Antioxidant activity was evaluated by hydroxyl radical, superoxide radical, 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical scavenging assay, chelating ability, reducing power, and total antioxidant capacity assays. Their EC ₅₀ val ...
DOI:
10.1080/10496475.2016.1225621

33. Apple pectin-derived oligosaccharides produce carbon dioxide radical anion in Fenton reaction and prevent growth of Escherichia coli and Staphylococcus aureus

Author:
Jelena Martinov; Miodrag Krstić; Snežana Spasić; Srdjan Miletić; Jovana Stefanović-Kojić; Aleksandra Nikolić-Kokić; Duško Blagojević; Ivan Spasojević; Mihajlo B. Spasić
Source:
Food research international 2017 v.100 pp. 132-136
ISSN:
0963-9969
Subject:
Citrus; Escherichia coli; Fourier transform infrared spectroscopy; Staphylococcus aureus; alkaline hydrolysis; antibacterial properties; apples; carbon dioxide; electron paramagnetic resonance spectroscopy; hydrogen peroxide; hydroxyl radicals; intestinal microorganisms; metabolites; oligosaccharides; pectins; proteins; soluble fiber
Abstract:
... Pectin is the main soluble fiber in apples or citruses. It may be fermented by gut microbiota to metabolites showing local intestinal and systemic effects. A wide range of beneficial effects of dietary pectin includes impacts on the redox milieu and microbiota profile. We prepared pectin-derived oligosaccharides (apple (APDO) and citrus) and polygalacturonic acid-derived oligosaccharides, using al ...
DOI:
10.1016/j.foodres.2017.08.040

34. Application of Nanosecond Laser Photolysis Protein Footprinting to Study EGFR Activation by EGF in Cells

Author:
Zhu Yi; Serra Aida; Guo Tiannan; Park Jung Eun; Zhong Qing; Sze Siu Kwan
Source:
Journal of Proteome Research 2017 v.16 no.6 pp. 2282-2293
ISSN:
1535-3907
Subject:
Escherichia coli; amino acids; crystal structure; hydroxyl radicals; mammals; mass spectrometry; membrane proteins; peptide mapping; peptides; photolysis; proteome
Abstract:
... Mass spectrometry-based protein footprinting emerged as a useful technology to understand protein ligand interactions in vitro. We have previously demonstrated the application of footprinting in live E. coli cells. Here, we further optimized an ultrafast laser photolysis hydroxyl radical footprinting method and applied it to study the interaction of EGF and EGFR in live mammalian cells. This metho ...
DOI:
10.1021/acs.jproteome.7b00154

35. Application of a novel microwave-assisted plasma ignition system in a direct injection gasoline engine

Author:
Joonsik Hwang; Wooyeong Kim; Choongsik Bae; Wonho Choe; Jeonghwa Cha; Soohyung Woo
Source:
Applied energy 2017 v.205 pp. 562-576
ISSN:
0306-2619
Subject:
air; carbon monoxide; combustion; cylinders; emissions; energy; free radicals; gasoline; heat; hydroxyl radicals; image analysis; microwave treatment; nitrogen oxides; temperature
Abstract:
... An experimental study was carried out to investigate the effect of microwave-assisted plasma ignition on the combustion and emission characteristics in a 500cm³ single cylinder direct injection gasoline engine. The microwave-assisted plasma ignition system consisted of a 2.45GHz magnetron (3kW), a waveguide, a mixer and a non-resistor spark plug. The first experiments were performed in a 1400cm³ c ...
DOI:
10.1016/j.apenergy.2017.07.129

36. Application of doped photocatalysts for organic pollutant degradation - A review

Author:
Mohammad Reza Delsouz Khaki; Mohammad Saleh Shafeeyan; Abdul Aziz Abdul Raman; Wan Mohd Ashri Wan Daud
Source:
Journal of environmental management 2017 pp. -
ISSN:
0301-4797
Subject:
adsorption; cadmium; cobalt; energy; hydroxyl radicals; industrial wastewater treatment; iron; irradiation; oxidation; photocatalysis; photocatalysts; photolysis; pollutants; titanium dioxide; ultraviolet radiation; zinc oxide
Abstract:
... Advanced oxidation process involves production of hydroxyl radical for industrial wastewater treatment. This method is based on the irradiation of UV light to photocatalysts such as TiO2 and ZnO for photodegradation of pollutant. UV light is used for irradiation in photocatalytic process because TiO2 has a high band gap energy which is around 3.2 eV. There can be shift adsorption to visible light ...
DOI:
10.1016/j.jenvman.2017.04.099

37. Application of oxa-aza[3.3.3]propellanes in the diastereoselective synthesis of indeno[1,2-b]pyrroles bearing bistriazole unit

Author:
Abdolali Alizadeh; Sara Basiri Abarghoei; Fahimeh Bayat; Mohammadreza Halvagar; Long-Guan Zhu
Source:
Tetrahedron 2017 pp. -
ISSN:
0040-4020
Subject:
chemical structure; chlorides; cycloaddition reactions; ethanol; hydroxyl radicals; pyrroles; trimethylamine
Abstract:
... A highly efficient procedure for the construction of indeno[1,2-b]pyrroles bearing bistriazole unit from hydrazonoyl chlorides and oxa-aza[3.3.3]propellanes in EtOH in the presence of Et3N is reported. The reaction is supposed to proceed through a 1,3-dipolar cycloaddition reaction and ring opening process. Two new cycles and four new CN bonds are formed in this transformation. The reaction scope ...
DOI:
10.1016/j.tet.2017.08.029

38. Aquatic photolysis of hydroxylated polybromodiphenyl ethers under direct UV irradiation: a case study of 2′-HO-BDE-68

Author:
Bentuo Xu; Minghong Wu; Chenyuan Pan; Yan Sun; Debao Yuan; Liang Tang; Gang Xu
Source:
Environmental science and pollution research international 2017 v.24 no.16 pp. 14409-14416
ISSN:
0944-1344
Subject:
case studies; ethers; hydrogen peroxide; hydroxyl radicals; irradiation; photolysis; pollutants; ultraviolet radiation
Abstract:
... Hydroxylated polyhalodiphenyl ethers (HO-PXDEs) have attracted considerable scientific interest as examples of emerging aquatic pollutants. However, a comprehensive assessment of disposal methods for this particular pollutant was seldom investigated. This study examined the UV light degradation of HO-PXDEs, using 2′-HO-2, 3′, 4, 5′-tetrabromodiphenyl ether (2′-HO-BDE-68) as a case study. The resul ...
DOI:
10.1007/s11356-017-8726-x

39. Aqueous root extract of Asparagus cochinchinensis (Lour.) Merr. Has antioxidant activity in D-galactose-induced aging mice

Author:
Linghua Lei; Yanhua Chen; Lijun Ou; Yinglong Xu; Xiaoying Yu
Source:
BMC complementary and alternative medicine 2017 v.17 no.1 pp. 469
ISSN:
1472-6882
Subject:
2,2-diphenyl-1-picrylhydrazyl; alternative medicine; antioxidant activity; ascorbic acid; blood serum; brain; catalase; free radical scavengers; free radicals; galactose; glutathione peroxidase; hydroxyl radicals; leukocyte count; liver; malondialdehyde; mice; models; nitric oxide; nitric oxide synthase; plant extracts; superoxide anion; superoxide dismutase; tissues
Abstract:
... BACKGROUND: Extracts of plants have been considered as sources of natural antioxidant agents. In this study, we aimed to explore the antioxidant capacity of the aqueous root extract of Asparagus cochinchinensis (Lour.) Merr. METHODS: Using vitamin C (Vc) as a positive control, we analyzed the aqueous root extract of A. cochinchinensis free radical scavenging ability in vitro. We also established a ...
DOI:
10.1186/s12906-017-1975-x
PubMed:
28946917
PubMed Central:
PMC5613520

40. The Arabidopsis GASA10 gene encodes a cell wall protein strongly expressed in developing anthers and seeds

Author:
Menelaos Trapalis; Song Feng Li; Roger W. Parish
Source:
Plant science 2017 v.260 pp. 71-79
ISSN:
0168-9452
Subject:
Arabidopsis; anthers; antimicrobial peptides; cell walls; fruits; fungi; gibberellic acid; hydroxyl radicals; microspores; reporter genes; seeds; structural proteins
Abstract:
... The Arabidopsis GASA10 gene encodes a GAST1-like (Gibberellic Acid-Stimulated) protein. Reporter gene analysis identified consistent expression in anthers and seeds. In anthers expression was developmentally regulated, first appearing at stage 7 of anther development and reaching a maximum at stage 11. Strongest expression was in the tapetum and developing microspores. GASA10 expression also occur ...
DOI:
10.1016/j.plantsci.2017.04.003

41. Assessing the hydroxyl radical and volatilization roles in aquatic fate estimations of sulfur heterocycles: Dibenzothiophene derivatives

Author:
Parichehr Saranjampour; Kevin L. Armbrust; Brian D. Marx
Source:
Environmental toxicology and chemistry 2017 v.36 no.8 pp. 1998-2004
ISSN:
0730-7268
Subject:
aquatic ecosystems; bitumen; computer software; exposure assessment; hydroxyl radicals; models; molecular weight; oil spills; petroleum; runoff; sulfur; volatilization
Abstract:
... Polycyclic aromatic sulfur heterocycles (PASHs) and their alkyl derivatives can be released into aquatic systems via crude oil spills or runoff from petroleum‐treated areas, such as asphalt. Dibenzothiophene (DBT) and its derivatives (C1‐DBT, C2‐DBT, and C4‐DBT) were chosen as model compounds to investigate the relative impact of volatilization and hydroxyl radical degradation on estimates of thei ...
DOI:
10.1002/etc.3745

42. Assessing the influence of ocean acidification to marine amphipods: A comparative study

Author:
M.C. Passarelli; I. Riba; A. Cesar; F. Serrano-Bernando; T.A. DelValls
Source:
Science of the total environment 2017 v.595 pp. 759-768
ISSN:
0048-9697
Subject:
Amphipoda; acidification; aquatic ecosystems; arsenic; carbon dioxide; carbon dioxide enrichment; carbon sequestration; carbonates; copper; ecotoxicology; hydroxyl radicals; mortality; ocean acidification; pH; principal component analysis; risk; seawater; sediments; surveys; toxicity; weight-of-evidence; zinc; Brazil; Spain
Abstract:
... CO2 increases in the ocean may occur both by the capacity of CO2 exchanges with its dissolved form between atmosphere and surface seawater as well by CO2 leaks during the carbon capture and storage (CCS) process. The decrease in seawater pH may result in a reduction in the concentration of both hydroxide and carbonate (OH– and CO32−). The main aim of this work is to conduct an ecotoxicology compar ...
DOI:
10.1016/j.scitotenv.2017.04.004

43. Assessment of arsenic trioxide toxicity on cock muscular tissue: alterations of oxidative damage parameters, inflammatory cytokines and heat shock proteins

Author:
Si-wen Li; Ying Guo; Ying He; Xiao Sun; Hong-jing Zhao; Yu Wang; Ya-jun Wang; Ming-wei Xing
Source:
Ecotoxicology 2017 v.26 no.8 pp. 1078-1088
ISSN:
0963-9292
Subject:
arsenic; catalase; diet; enzyme activity; glutathione peroxidase; heat shock proteins; hydroxyl radicals; inducible nitric oxide synthase; inflammation; malondialdehyde; messenger RNA; oxidative stress; prostaglandin synthase; prostaglandins; protective effect; roosters; tissues; toxicity; transcription factor NF-kappa B; tumor necrosis factor-alpha
Abstract:
... To evaluate the toxicity of arsenic trioxide (As₂O₃) in the muscular tissues (wing, thigh and pectoral) of birds, 72 one-day-old Hy-line cocks were selected and randomly divided into four groups. They were fed either a commercial diet or an arsenic-supplemented diet containing 7.5, 15 or 30 mg/kg As₂O₃. The experiment lasted for 90 days and the samples of muscular tissues were collected at 30, 60 ...
DOI:
10.1007/s10646-017-1835-y

44. Assessment of phenolics contents and antioxidant properties in Cimicifuga dahurica (Turcz.) Maxim during drying process

Author:
Ru-Lan Qin; Chong-Ning Lv; Ying Zhao; Yu-Dan Zhao; Yang Yu; Jin-Cai Lu
Source:
Industrial crops and products 2017 v.107 pp. 288-296
ISSN:
0926-6690
Subject:
2,2-diphenyl-1-picrylhydrazyl; Oriental traditional medicine; antioxidant activity; correlation; drying; high performance liquid chromatography; hydroxyl radicals; phenolic acids; tea
Abstract:
... Cimicifuga dahurica (Turcz.) Maxim is usually used as traditional Chinese medicine and functional tea. In present work, the change of its phenolics profiles and antioxidant activities during drying processes were investigated. Nineteen main bioactive analytes of C. dahurica were simultaneously quantified by HPLC-DAD to assess the effect of drying method. Meanwhile, the influence of different dryin ...
DOI:
10.1016/j.indcrop.2017.06.004

45. Atmospheric chemical reaction mechanism and kinetics of 1,2-bis(2,4,6-tribromophenoxy)ethane initiated by OH radical: a computational study

Author:
Qi Yu; Hong-Bin Xie; Tianchi Li; Fangfang Ma; Zihao Fu; Zhongyu Wang; Chao Li; Zhiqiang Fu; Deming Xia; Jingwen Chen
Source:
RSC advances 2017 v.7 no.16 pp. 9484-9494
ISSN:
2046-2069
Subject:
chemical reactions; ethane; flame retardants; free radicals; hydrogen; hydroxyl radicals; markets; models; polybrominated diphenyl ethers; quantum mechanics; reaction mechanisms; risk; toxicity
Abstract:
... The unexpected diverse effect of alternatives for banned chemicals has stimulated scientific and public concern on their environmental risk. As an alternative of polybrominated diphenyl ethers (PBDEs), 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE) is currently one of the most commonly applied novel brominated flame retardants with wide market prospects. Due to its frequent and high detection in th ...
DOI:
10.1039/c6ra26700a

46. Atmospheric degradation of 2- nitrobenzaldehyde: Photolysis and reaction with OH radicals

Author:
H. Bouya; M. Al Rashidi; E. Roth; R. Salghi; A. Chakir
Source:
Atmospheric environment 2017 v.171 pp. 221-228
ISSN:
1352-2310
Subject:
Fourier transform infrared spectroscopy; absorption; atmospheric chemistry; free radicals; gases; hydroxyl radicals; oxidation; photolysis; spectrometers; temperature; troposphere
Abstract:
... This work presents an experimental study of the gas phase kinetics of 2-nitrobenzaldehyde (2-NBA) photolysis and oxidation by OH radicals. The experiments were carried out in an atmospheric simulation chamber coupled to an FTIR spectrometer and CG/MS. The UV spectra of 2-NBA were also measured and the experimentally determined absorption cross sections were used to estimate the atmospheric photo-d ...
DOI:
10.1016/j.atmosenv.2017.10.021

47. Atmospheric oxidation of selected chlorinated alkenes by O3, OH, NO3 and Cl

Author:
Qun Zhang; Yi Chen; Shengrui Tong; Maofa Ge; Justin Shenolikar; Matthew S. Johnson; Yifeng Wang; Narcisse T. Tsona; Abdelwahid Mellouki; Lin Du
Source:
Atmospheric environment 2017 v.170 pp. 12-21
ISSN:
1352-2310
Subject:
alkenes; atmospheric chemistry; atmospheric pressure; flame ionization; free radicals; gases; hydroxyl radicals; oxidants; oxidation; ozone; polytetrafluoroethylene; reaction mechanisms
Abstract:
... An experimental study on the 3-chloro-2-methyl-1-propene (CMP), 2,3-dichloropropene (DCP) and 3,4-dichlorobutene (DCB) reactions with atmospheric oxidants at (298 ± 1) K and atmospheric pressure is reported. Rate constants for the gas phase reactions of the three chlorinated alkenes with O3, OH and NO3 radicals and Cl atom were determined in a 100 L Teflon reactor by gas chromatography with flame ...
DOI:
10.1016/j.atmosenv.2017.09.031

48. The Benthic Invertebrates Floodplain Index – Extending the assessment approach

Author:
Andrea Funk; Daniel Trauner; Walter Reckendorfer; Thomas Hein
Source:
Ecological indicators 2017 v.79 pp. 303-309
ISSN:
1470-160X
Subject:
Amphipoda; Chironomidae; European Union; Oligochaeta; Trichoptera; data collection; ecosystems; floodplains; hydroxyl radicals; invertebrates; landscapes; rivers; surface water
Abstract:
... Floodplains are highly diverse landscape elements within river systems and among the most endangered ecosystems worldwide. In this paper we complement indices developed to assess the ecological status of floodplain systems, compliant with the EU Water Framework Directive, to an overall “Benthic Invertebrate Floodplain Index” (BIFI). With the addition of taxa (mainly oligochaetes, chironomidae and ...
DOI:
10.1016/j.ecolind.2017.04.035

49. Bio-Electron-Fenton (BEF) process driven by microbial fuel cells for triphenyltin chloride (TPTC) degradation

Author:
Xiao-Yu Yong; Dong-Yan Gu; Yuan-Dong Wu; Zhi-Ying Yan; Jun Zhou; Xia-Yuan Wu; Ping Wei; Hong-Hua Jia; Tao Zheng; Yang-Chun Yong
Source:
Journal of hazardous materials 2017 v.324 pp. 178-183
ISSN:
0304-3894
Subject:
carbon dioxide; cathodes; chlorides; electric power; electricity generation; energy conservation; graphene; hydrogen peroxide; hydroxyl radicals; iron; microbial fuel cells; pollution; tin
Abstract:
... The intensive use of triphenyltin chloride (TPTC) has caused serious environmental pollution. In this study, an effective method for TPTC degradation was proposed based on the Bio-Electron-Fenton process in microbial fuel cells (MFCs). The maximum voltage of the MFC with graphite felt as electrode was 278.47% higher than that of carbon cloth. The electricity generated by MFC can be used for in sit ...
DOI:
10.1016/j.jhazmat.2016.10.047

50. Bioactivity and chemical profiling of the Juniperus excelsa, which support its usage as a food preservative and nutraceutical

Author:
Marija Lesjak; Ivana Beara; Dejan Orčić; Goran Anačkov; Petar Knežević; Zorica Mrkonjić; Neda Mimica–Dukić
Source:
International journal of food properties 2017 v.20 no.sup2 pp. 1652-1663
ISSN:
1094-2912
Subject:
Juniperus excelsa; alpha-pinene; anti-inflammatory activity; antimicrobial properties; antioxidant activity; bacteria; butylated hydroxyanisole; catechin; cedrol; eicosanoids; essential oils; food preservatives; food quality; functional foods; gas chromatography-mass spectrometry; health promotion; hydroxyl radicals; leaves; limonene; lipid peroxidation; liquid chromatography; quercitrin; spices; tandem mass spectrometry
Abstract:
... Leaves and cones of the genus Juniperus, regularly used as a spice, could be a candidate for new food preservative with significant nutraceutical qualities. The main goal of this study was to evaluate the bioactivity and chemical profiling of the Juniperus excelsa leaves and cones in order to support its usage as a health-promoting food additive. The content of 44 phenolics was determined using Li ...
DOI:
10.1080/10942912.2017.1352598

51. Biodiesel production from lipid of carbon dioxide sequestrating bacterium and lipase of psychrotolerant Pseudomonas sp. ISTPL3 immobilized on biochar

Author:
Khushboo Khosla; Rashmi Rathour; Raj Maurya; Neha Maheshwari; Edgard Gnansounou; Christian Larroche; Indu Shekhar Thakur
Source:
Bioresource technology 2017 v.245 pp. 743-750
ISSN:
0960-8524
Subject:
Pseudomonas; Serratia; ammonium sulfate; biochar; biodiesel; carbon dioxide; carboxylic ester hydrolases; detergents; dialysis; fatty acid methyl esters; fuel production; gel chromatography; hydroxyl radicals; ion exchange chromatography; lakes; lipids; molecular weight; psychrophilic bacteria; sodium hydroxide; solvents; thermal stability; transesterification
Abstract:
... An extracellular lipase was purified and characterized from psychrotolerant bacterium Pseudomonas sp. ISTPL3 isolated from Pangong lake. Lipase was purified by sequential methods of ammonium sulphate precipitation, dialysis, DEAE-cellulose ion exchange chromatography and Sephadex G-100 gel filtration chromatography, resulting in a purification fold of 6.53 and yield of 5.45%. The molecular weight ...
DOI:
10.1016/j.biortech.2017.08.194

52. Bioinspired electrocatalysts for oxygen reduction using recombinant silk films

Author:
Trevor D. Rapson; Ryo Kusuoka; Joseph Butcher; Mustafa Musameh; Christopher J. Dunn; Jeffrey S. Church; Andrew C. Warden; Christopher F. Blanford; Nobuhumi Nakamura; Tara D. Sutherland
Source:
Journal of materials chemistry A 2017 v.5 no.21 pp. 10236-10243
ISSN:
2050-7496
Subject:
Escherichia coli; catalysts; catalytic activity; cathodes; chemical bonding; electrochemistry; fuel cells; heme iron; heme proteins; heterolytic cleavage; homolytic cleavage; honey bees; hydrogen peroxide; hydroxyl radicals; oxidants; oxygen; pH; platinum; renewable energy sources; silk; silk proteins; tyrosine
Abstract:
... Fuel cells are a promising avenue for renewable energy production. While oxygen remains the preferred oxidant, its slow reduction kinetics has limited fuel cell performance and it currently requires the use of platinum as the cathode catalyst. In the search for non-platinum cathodes, inspiration has been sought from biological oxygen reduction processes which use heme proteins for respiration. Her ...
DOI:
10.1039/c7ta02322g

53. Biosensing platform for the detection of uric acid based on graphene quantum dots and G-quadruplex/hemin DNAzyme

Author:
Nan Cai; Lu Tan; Yan Li; Tingting Xia; Tianyu Hu; Xingguang Su
Source:
Analytica chimica acta 2017 pp. -
ISSN:
0003-2670
Subject:
allantoin; ambient temperature; analytical chemistry; blood serum; caffeic acid; detection limit; fluorescence; graphene; humans; hydrogen peroxide; hydroxyl radicals; monitoring; peroxidase; quantum dots; uric acid; urine
Abstract:
... In this paper, a label-free biosensing platform for fluorescence detection of uric acid was designed on the peroxidase-mimicking activities of G-quadruplex/hemin DNAzyme and the introduction of caffeic acid. Uric acid could be decomposed by uricase and then produced hydrogen peroxide and allantoin. We thus successfully achieved the indirect detection of uric acid by monitoring the concentration of ...
DOI:
10.1016/j.aca.2017.01.067

54. Boesenberols I–K, new isopimarane diterpenes from Boesenbergia pandurata with TRAIL-resistance overcoming activity

Author:
Utpal K. Karmakar; Midori A. Arai; Takashi Koyano; Thaworn Kowithayakorn; Masami Ishibashi
Source:
Tetrahedron letters 2017 v.58 pp. 3838-3841
ISSN:
0040-4039
Subject:
agonists; antineoplastic agents; chemical reactions; chemical structure; diterpenoids; fractionation; hydroxyl radicals; methanol; neoplasm cells; neoplasms; nuclear magnetic resonance spectroscopy; rhizomes
Abstract:
... TRAIL is a promising anticancer agent due to its unique ability to kill tumor cells selectively without harming non-malignant cells. However, some cancer cells are reported to be TRAIL-resistant. Searching potent TRAIL agonist to overcome resistance is an important strategy for its successful use as an anticancer agent. As a part of our continuous research on natural inhibitors, activity-guided fr ...
DOI:
10.1016/j.tetlet.2017.08.055

55. Bromate formation from the oxidation of bromide in the UV/chlorine process with low pressure and medium pressure UV lamps

Author:
Jingyun Fang; Quan Zhao; Chihhao Fan; Chii Shang; Yun Fu; Xiangru Zhang
Source:
Chemosphere 2017 v.183 pp. 582-588
ISSN:
0045-6535
Subject:
bromine; carcinogens; chlorination; chlorine; free radicals; humans; hydroxyl radicals; lamps; oxidation; pH; photolysis; ultraviolet radiation
Abstract:
... When a bromide-containing water is treated by the ultraviolet (UV)/chlorine process, hydroxyl radicals (HO) and halogen radicals such as Cl or Br are formed due to the UV photolysis of free halogens. These reactive species may induce the formation of bromate, which is a probable human carcinogen. Bromate formation in the UV/chlorine process using low pressure (LP) and medium pressure (MP) lamps in ...
DOI:
10.1016/j.chemosphere.2017.05.136

56. Can Carbamates Undergo Radical Oxidation in the Soil Environment? A Case Study on Carbaryl and Carbofuran

Author:
Irmina Ćwieląg-Piasecka; Maciej Witwicki; Maria Jerzykiewicz; Julia Jezierska
Source:
Environmental science & technology 2017 v.51 no.24 pp. 14124-14134
ISSN:
1520-5851
Subject:
2,2-diphenyl-1-picrylhydrazyl; carbaryl; carbofuran; case studies; density functional theory; edaphic factors; electron paramagnetic resonance spectroscopy; free radicals; fulvic acids; gallic acid; humic acids; hydrogen; hydroxyl radicals; oxidation; remediation; soil; thermodynamics; ultraviolet-visible spectroscopy
Abstract:
... Radical oxidation of carbamate insecticides, namely carbaryl and carbofuran, was investigated with spectroscopic (electron paramagnetic resonance [EPR] and UV–vis) and theoretical (density functional theory [DFT] and ab initio orbital-optimized spin-component scaled MP2 [OO-SCS-MP2]) methods. The two carbamates were subjected to reaction with •OH, persistent DPPH• and galvinoxyl radical, as well a ...
DOI:
10.1021/acs.est.7b03386

57. Carbon dots based FRET for the detection of DNA damage

Author:
Jiri Kudr; Lukas Richtera; Kledi Xhaxhiu; David Hynek; Zbynek Heger; Ondrej Zitka; Vojtech Adam
Source:
Biosensors & bioelectronics 2017 v.92 pp. 133-139
ISSN:
0956-5663
Subject:
DNA; DNA damage; DNA fragmentation; absorption; bacteriophages; biosensors; carbon; citric acid; electrophoresis; energy transfer; ethidium; genomics; hydroxyl radicals; melanoma; pH; photoluminescence; pyrolysis; tissues; ultraviolet radiation
Abstract:
... Here, we aimed our attention at the synthesis of carbon dots (C-dots) with the ability to interact with DNA to suggest an approach for the detection of DNA damage. Primarily, C-dots modified with amine moieties were synthesized using the one-step microwave pyrolysis of citric acid in the presence of diethylenetriamine. The C-dots showed strong photoluminescence with a quantum yield of 4%. In addit ...
DOI:
10.1016/j.bios.2017.01.067

58. Catalase-Modulated Heterogeneous Fenton Reaction for Selective Cancer Cell Eradication: SnFe2O4 Nanocrystals as an Effective Reagent for Treating Lung Cancer Cells

Author:
Lee Kuan-Ting; Lu Yu-Jen; Mi Fwu-Long; Burnouf Thierry; Wei Yi-Ting; Chiu Shao-Chieh; Chuang Er-Yuan; Lu Shih-Yuan
Source:
ACS Applied Materials & Interfaces 2017 v.9 no.2 pp. 1273-1279
ISSN:
1944-8252
Subject:
apoptosis; catalase; catalysts; cytotoxicity; hydrogen peroxide; hydroxyl radicals; ions; iron; lung neoplasms; nanocrystals; neoplasm cells
Abstract:
... Heterogeneous Fenton reactions have been proven to be an effective and promising selective cancer cell treatment method. The key working mechanism for this method to achieve the critical therapeutic selectivity however remains unclear. In this study, we proposed and demonstrated for the first time the critical role played by catalase in realizing the therapeutic selectivity for the heterogeneous F ...
DOI:
10.1021/acsami.6b13529

59. Catalyst-free activation of peroxides under visible LED light irradiation through photoexcitation pathway

Author:
Yaowen Gao; Yixi Li; Linyu Yao; Simiao Li; Jin Liu; Hui Zhang
Source:
Journal of hazardous materials 2017 v.329 pp. 272-279
ISSN:
0304-3894
Subject:
catalysts; catalytic activity; decolorization; electron paramagnetic resonance spectroscopy; electron transfer; eosin; free radicals; hydroxyl radicals; irradiation; models; peroxides; photochemical reactions; photoluminescence; pollution; rhodamines; sulfates
Abstract:
... Catalysts are known to activate peroxides to generate active radicals (i.e., hydroxyl radical (OH) and sulfate radical (SO4⁻)) under certain conditions, but the activation of peroxides in the absence of catalysts under visible light irradiation has been rarely reported. This work demonstrates a catalyst-free activation of peroxides for the generation of OH and/or SO4⁻ through photoexcited electron ...
DOI:
10.1016/j.jhazmat.2017.01.046

60. Catalytic ozonation of dimethyl phthalate by Ce-substituted goethite

Author:
Z. Y. Bai; J. L. Wang; Q. Yang
Source:
International journal of environmental science and technology 2017 v.14 no.11 pp. 2379-2388
ISSN:
1735-1472
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; active sites; anions; aquatic environment; catalysts; chlorides; dimethyl phthalate; electron transfer; goethite; hydroxyl radicals; ozonation; phosphates; plasticizers; scanning electron microscopes; sulfates; surface area
Abstract:
... Dimethyl phthalate (DMP) is ubiquitous in aquatic environments due to extensively used as plasticizer, which has received increasing attention in recent years. In this study, the catalytic ozonation of dimethyl phthalate was performed using Ce-substituted goethite as a novel catalyst, which was prepared by isomorphous substitution method. The specific surface area, pHpzc and surface hydroxyl densi ...
DOI:
10.1007/s13762-017-1319-x

61. Catalytic ozonation of dimethyl phthalate using Fe₃O₄/multi-wall carbon nanotubes

Author:
Zhiyong Bai; Qi Yang; Jianlong Wang
Source:
Environmental technology 2017 v.38 no.16 pp. 2048-2057
ISSN:
1479-487X
Subject:
adsorption; aqueous solutions; carbon nanotubes; catalysts; dimethyl phthalate; environmental technology; hydrogen peroxide; hydroxyl radicals; iron; mineralization; organic acids and salts; ozonation; ozone; pH; phosphates
Abstract:
... In this paper, Fe₃O₄/multi-wall carbon nanotubes composites were prepared, characterized and used as a catalyst for enhancing the ozonation of dimethyl phthalate (DMP) in aqueous solution. The experimental results showed that DMP degradation and mineralization increased by 26% and 20%, respectively, in catalytic ozonation compared with single ozonation, and more H₂O₂ and organic acids were produce ...
DOI:
10.1080/09593330.2016.1245360

62. Cathodically Dissolved Platinum Resulting from the O2 and H2O2 Reduction Reactions on Platinum Ultramicroelectrodes

Author:
Percival Stephen J.; Dick Jeffrey E.; Bard Allen J.
Source:
Analytical chemistry 2017 v.89 no.5 pp. 3087-3092
ISSN:
1520-6882
Subject:
byproducts; carbon fibers; electrodes; hydrogen peroxide; hydroxyl radicals; ions; nanoparticles; oxygen; platinum
Abstract:
... The cathodic dissolution of platinum, resulting from the oxygen reduction reaction (ORR) or hydrogen peroxide reduction on platinum, has been investigated. Highly oxidizing hydroxyl radicals (OH•) are believed to be the species responsible for the platinum dissolution phenomenon. These radicals are produced from the ORR byproduct, hydrogen peroxide, through a 1 electron reduction pathway (H₂O₂ + e ...
DOI:
10.1021/acs.analchem.6b04832

63. Cellulose Nanofibrils and Diblock Copolymer Complex: Micelle Formation and Enhanced Dispersibility

Author:
Dong Hong; Napadensky Eugene; Orlicki Joshua A.; Snyder James F.; Chantawansri Tanya L.; Kapllani Alda
Source:
ACS sustainable chemistry 2017 v.5 no.2 pp. 1264-1271
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; adhesion; cellulose microfibrils; composite polymers; dimethyl sulfoxide; dimethylformamide; dispersibility; ethanol; hydrogen bonding; hydrophilicity; hydrophobicity; hydroxyl radicals; methanol; micelles; nanofibers; polymethylmethacrylate; solvents
Abstract:
... A great challenge to the utilization of bioderived cellulose nanofibrils (CNFs) is related to dispersion, where the hydrophilic nature makes them difficult to disperse in both organic solvents and hydrophobic polymers. In this study, an amphiphilic diblock copolymer, poly(methyl methacrylate-b-acrylic acid) (PMMA-b-PAA), which contains a short interactive block of PAA and a long hydrophobic block ...
DOI:
10.1021/acssuschemeng.6b00811

64. Characteristics and fate of natural organic matter during UV oxidation processes

Author:
Yongtae Ahn; Doorae Lee; Minhwan Kwon; Il-hwan Choi; Seong-Nam Nam; Joon-Wun Kang
Source:
Chemosphere 2017 v.184 pp. 960-968
ISSN:
0045-6535
Subject:
carbon; factor analysis; hydrogen peroxide; hydroxyl radicals; mercury; mineralization; organic matter; oxidants; oxidation; rivers; sulfates
Abstract:
... Advanced oxidation processes (AOPs) are widely used in water treatments. During oxidation processes, natural organic matter (NOM) is modified and broken down into smaller compounds that affect the characteristics of the oxidized NOM by AOPs. In this study, NOM was characterized and monitored in the UV/hydrogen peroxide (H2O2) and UV/persulfate (PS) processes using a liquid chromatography–organic c ...
DOI:
10.1016/j.chemosphere.2017.06.079

65. Characterization and antioxidant activities of marine pepsin soluble collagen from the skin of yellow goosefish Lophius litulon

Author:
Bin Zheng; Xingwei Xiang; Yufang Zhou; Huicheng Yang; Hongyu Luo; Miaofei Liao; Zhengshun Wen
Source:
Chinese journal of oceanology and limnology 2017 v.35 no.3 pp. 634-644
ISSN:
0254-4059
Subject:
Fourier transform infrared spectroscopy; Lophius litulon; antioxidant activity; catalase; collagen; denaturation; glutathione; glutathione peroxidase; hydroxyl radicals; hydroxyproline; imino acids; malondialdehyde; pH; pepsin; sodium chloride; solubility; superoxide anion; superoxide dismutase; temperature
Abstract:
... Characteristics and antioxidant activities of pepsin-soluble collagen (PSC) from yellow goosefish (Lophius litulon) skins were investigated. PSC was characterized as a type I collagen, and its imino acid content was 193 residues/1 000 residues. PSC’s denaturation temperature was ~17.56°C and Fourier transform infrared spectra confirmed the presence of triple helices. Solubility analysis showed goo ...
DOI:
10.1007/s00343-017-5377-1

66. Characterization of bioactive chitosan and sulfated chitosan from Doryteuthis singhalensis (Ortmann, 1891)

Author:
Pasiyappazham Ramasamy; Namasivayam Subhapradha; Thangadurai Thinesh; Joseph Selvin; Kanagaraj Muthamizh Selvan; Vairamani Shanmugam; Annaian Shanmugam
Source:
International journal of biological macromolecules 2017 pp. -
ISSN:
0141-8130
Subject:
functional foods; nuclear magnetic resonance spectroscopy; hydroxyl radicals; ions; squid; molecular weight; chitosan; prothrombin; sulfates; 2,2-diphenyl-1-picrylhydrazyl; iron; scanning electron microscopy; anticoagulants; Fourier transform infrared spectroscopy; antioxidant activity; thromboplastin
Abstract:
... Chitosan was extracted from the pen of squid Doryteuthis singhalensis and was characterized using FT-IR, NMR, CHN, SEM and DSC analysis. Purified chitosan was sulfated with chlorosulfonic acid in N,N-dimethylformamid and the added sulfate group was confirmed with FT-IR analysis. The molecular weight and degree of deacetylation (DDA) of chitosan was found 226.6kDa and 83.76% respectively. Chitosan ...
DOI:
10.1016/j.ijbiomac.2017.03.041

67. Characterization of the precipitated lignin from Japanese beech as treated by semi-flow hot-compressed water

Author:
Masatsugu Takada; Eiji Minami; Kazuchika Yamauchi; Haruo Kawamoto; Shiro Saka
Source:
Holzforschung 2017 v.71 no.4 pp. 285-290
ISSN:
1437-434X
Subject:
Fagus crenata; hemicellulose; hydroxyl radicals; lignin; oxidation; spectroscopy; vanillin; wood
Abstract:
... Japanese beech (Fagus crenata) was decomposed by a semi-flow process in hot-compressed water (HCW) at 150~230°C/10 MPa for 25 min. Mainly hemicelluloses and partly the lignin moiety of the wood was affected and liquefied in water. A part of the liquefied products can be precipitated after 12 h standing at ambient conditions. The precipitates are composed of around 90% of lignin, which was quantifi ...
DOI:
10.1515/hf-2016-0139

68. A Chemical Kinetic Investigation on Butyl Formate Oxidation: Ab Initio Calculations and Experiments in a Jet-Stirred Reactor

Author:
Zaras Aristotelis M.; Szőri Milan; Thion Sébastien; Van Cauwenberghe Pierre; Deguillaume Fiona; Serinyel Zeynep; Dayma Guillaume; Dagaut Philippe
Source:
Energy & Fuels 2017 v.31 no.6 pp. 6194-6205
ISSN:
1520-5029
Subject:
biofuels; biomass; combustion; formates; formic acid; free radicals; hydrogen; hydroxyl radicals; models; temperature
Abstract:
... Biofuels are expected to play a significant role in the quest for greener energy generation. In this perspective, esters produced from biomass are promising candidates. This work presents the first computational kinetic study on n-butyl formate (BF) oxidation under combustion conditions coupled to an experimental study in a jet-stirred reactor. Absolute rate constants for hydrogen abstraction reac ...
DOI:
10.1021/acs.energyfuels.7b00686

69. Chemical characterization of organosulfates from the hydroxyl radical-initiated oxidation and ozonolysis of cis-3-hexen-1-ol

Author:
Thais S. Barbosa; Matthieu Riva; Yuzhi Chen; Cleyton M. da Silva; Jose Claudino S. Ameida; Zhenfa Zhang; Avram Gold; Graciela Arbilla; Glauco F. Bauerfeldt; Jason D. Surratt
Source:
Atmospheric environment 2017 v.162 pp. 141-151
ISSN:
1352-2310
Subject:
aerosols; atmospheric chemistry; gases; hydroxyl radicals; leaves; mass spectrometry; molecular weight; oxidation; ozone; ozonolysis; particulates; relative humidity; sulfates; ultra-performance liquid chromatography; volatile organic compounds; Brazil
Abstract:
... Cis-3-hexen-1-ol (cis-HXO) is a green leaf volatile emitted from plants under stress and belongs to an important class of biogenic volatile organic compounds. In this study, we have investigated the potential formation of organosulfates (OSs) from the hydroxyl radical (OH)-initiated oxidation and ozonolysis of cis-HXO using either non-acidified or acidified sulfate seed aerosols under different re ...
DOI:
10.1016/j.atmosenv.2017.04.026

70. Chemical composition, radical scavenging and anti-oxidant capacity of Ocimum Basilicum essential oil

Author:
Gholamreza Kavoosi; Zahra Amirghofran
Source:
Journal of essential oil research 2017 v.29 no.2 pp. 189-199
ISSN:
2163-8152
Subject:
antiseptics; 2,2-diphenyl-1-picrylhydrazyl; Ocimum basilicum; basil; essential oils; nitrogen dioxide; nitrites; geranial; hydrogen peroxide; macrophages; anesthetics; gene expression; gas chromatography-mass spectrometry; NAD (coenzyme); messenger RNA; neral; mice; oils; antioxidant activity; parasympatholytics; chemical composition; quantitative polymerase chain reaction; hydroxyl radicals; nitric oxide; reverse transcriptase polymerase chain reaction; therapeutics; inducible nitric oxide synthase; functional properties; analgesics
Abstract:
... Ocimum basilicum has several functional characteristics including carminative, stimulant, diuretic, antiseptic, anesthetic, anti-spasmodic, analgesic and anti-tussive properties. O. basilicum essential oil (basil oil) was tested for chemical composition and in vitro and ex vivo anti-oxidant activities. The in vitro anti-oxidant capacity of basil oil was examined using 1, 1-diphenyl-2-picryl-hudraz ...
DOI:
10.1080/10412905.2016.1213667

71. Chemiluminescence immunoassays for estradiol and ethinylestradiol based on new biotinylated estrogen derivatives

Author:
Hussein Kanso; Nicolas Inguimbert; Georges Istamboulie; Lise Barthelmebs; Carole Calas-Blanchard; Thierry Noguer
Source:
Analytical biochemistry 2017 v.537 pp. 63-68
ISSN:
0003-2697
Subject:
antibodies; biotin; chemical bonding; chemiluminescence immunoassays; effluents; estradiol; hydroxyl radicals; peroxidase; serum albumin; wastewater treatment
Abstract:
... New chemiluminescence-based immunoassays for sensitive detection of 17-β estradiol (E2) and ethinylestradiol (EE2) are described on the basis of the use of biotinylated estrogen derivatives. Estrogen derivatives bearing a carboxylic group (E2-COOH and EE2-COOH) on C-3 position were synthesized, covalently bound to aminated biotin and subsequently immobilized on avidin-coated microtiter plates. The ...
DOI:
10.1016/j.ab.2017.08.023

72. Cobinding of Pharmaceutical Compounds at Mineral Surfaces: Mechanistic Modeling of Binding and Cobinding of Nalidixic Acid and Niflumic Acid at Goethite Surfaces

Author:
Xu Jing; Marsac Rémi; Wei Cheng; Wu Feng; Boily Jean-François; Hanna Khalil
Source:
Environmental Science & Technology 2017 v.51 no.20 pp. 11617-11624
ISSN:
1520-5851
Subject:
adsorption; drugs; environmental fate; goethite; hydrogen bonding; hydroxyl radicals; mechanistic models; nalidixic acid; pH; prediction; salinity; sodium; sodium chloride
Abstract:
... Although emerging contaminants rarely exist individually in environmental contaminated systems, only limited information on their adsorption mechanisms in multicomponent solutions is currently available. To address this shortcoming, this work examines for the first time the accuracy of a surface complexation model in predicting the cooperative adsorption of nalidixic acid (NA) and niflumic acid (N ...
DOI:
10.1021/acs.est.7b02900

73. Coffee-Driven Green Activation of Cellulose and Its Use for All-Paper Flexible Supercapacitors

Author:
Lee Donggue; Cho Yoon-Gyo; Song Hyun-Kon; Chun Sang-Jin; Park Sang-Bum; Choi Don-Ha; Lee Sun-Young; Yoo JongTae; Lee Sang-Young
Source:
ACS Applied Materials & Interfaces 2017 v.9 no.27 pp. 22568-22577
ISSN:
1944-8252
Subject:
activated carbon; coffee (beverage); carbonization; hydroxyl radicals; packaging; cations; electrodes; capacitance; cellulose; paper; porous media; polyvinyl alcohol; potassium; ingredients; pyrolysis; natural resources; nanotubes; alcohols
Abstract:
... Cellulose, which is one of the most-abundant and -renewable natural resources, has been extensively explored as an alternative substance for electrode materials such as activated carbons. Here, we demonstrate a new class of coffee-mediated green activation of cellulose as a new environmentally benign chemical-activation strategy and its potential use for all-paper flexible supercapacitors. A piece ...
DOI:
10.1021/acsami.7b05712

74. Colored grape polyphenol concentrate

Author:
T.N. Gvinianidze; P.M. Chikovani; T.T. Gvinianidze; R.H. Jabnidze; V.A. Mindeli
Source:
Annals of Agrarian Science 2017 v.15 no.4 pp. 472-475
ISSN:
1512-1887
Subject:
2,2-diphenyl-1-picrylhydrazyl; absorbance; aluminum chloride; anthocyanins; antioxidant activity; blood plasma; color; dietary supplements; ethanol; grapes; hydroxyl radicals; pesticides; phenol; polyphenols; sorbents; spectrophotometers; temperature; vitamins; Europe; United States
Abstract:
... The research is aimed at obtaining, processing-filtering of ethanol extracts enriched with a phenolic complex of grape skins and stone remained as a result of processing environmentally clean local color grape varieties (whose cultivation process does not envisages the use of pesticides and other chemicals), and assessing their quality indicators. The extraction process of separate samples was car ...
DOI:
10.1016/j.aasci.2017.08.004

75. Colorimetric detection of thiocyanate based on inhibiting the catalytic activity of cystine-capped core-shell Au@Pt nanocatalysts

Author:
Chi-Fang Peng; Na Pan; Qian Zhi-Juan; Xin-Lin Wei; Guang Shao
Source:
Talanta 2017 v.175 pp. 114-120
ISSN:
0039-9140
Subject:
X-ray photoelectron spectroscopy; catalytic activity; colorimetry; cystine; free radicals; hydroxyl radicals; ions; quantitative analysis; raw milk; thiocyanates; transmission electron microscopy
Abstract:
... In this work, core-shell Au@Pt nanocatalysts (Au@Pt NCs) with ultrathin Pt shell were synthesized and demonstrated high peroxidase-like activity. Thiocyanate ions (SCN⁻) were found to effectively inhibit the peroxidase-like activity of Au@Pt NCs, and the mechanism was discussed by the characterization of TEM, DLS, EPR and XPS, etc. The inhibition of the catalytic activity of Au@Pt NCs by SCN⁻ was ...
DOI:
10.1016/j.talanta.2017.06.005

76. Combined process of high-pressure homogenization and hydrothermal extraction for the extraction of fucoidan with good antioxidant properties from Nemacystus decipients

Author:
Guo-Ying Li; Zhang-Cai Luo; Fang Yuan; Xiao-bin Yu
Source:
Food and bioproducts processing 2017 v.106 pp. 35-42
ISSN:
0960-3085
Subject:
2,2-diphenyl-1-picrylhydrazyl; Nemacystus; antioxidant activity; chemical composition; fucoidan; homogenization; hydroxyl radicals; iron; macroalgae; molecular weight; sulfates
Abstract:
... Sulfated polysaccharides (fucoidan) were recovered from Nemacystus decipients using a combination of high pressure homogenization (HPH) and hydrothermal extraction process through employing different homogenization pressure (40–100MPa) and cycle times (1–3). HPH treatment could result in a high fucoidan yield with preserving sulfate content and the optimal yield was 16.67±0.36%, obtained from 70MP ...
DOI:
10.1016/j.fbp.2017.08.002

77. Comparative ecotoxicity of polystyrene nanoparticles in natural seawater and reconstituted seawater using the rotifer Brachionus plicatilis

Author:
L. Manfra; A. Rotini; E. Bergami; G. Grassi; C. Faleri; I. Corsi
Source:
Ecotoxicology and environmental safety 2017 v.145 pp. 557-563
ISSN:
0147-6513
Subject:
Brachionus plicatilis; digestive system; ecotoxicology; hydroxyl radicals; ionic strength; larvae; lethal concentration 50; models; mortality; nanoparticles; polystyrenes; saline water; seawater; toxicity
Abstract:
... The impact of nanoplastics using model polystyrene nanoparticles (PS NPs), anionic (PS-COOH) and cationic (PS-NH2), has been investigated on the marine rotifer Brachionus plicatilis, a major component of marine zooplanktonic species. The role of different surface charges in affecting PS NP behaviour and toxicity has been considered in high ionic strength media. To this aim, the selected media were ...
DOI:
10.1016/j.ecoenv.2017.07.068

78. Comparative study of the formation of brominated disinfection byproducts in UV/persulfate and UV/H2O2 oxidation processes in the presence of bromide

Author:
Lu Wang; Yuefei Ji; Junhe Lu; Deyang Kong; Xiaoming Yin; Quansuo Zhou
Source:
Environmental science and pollution research international 2017 v.24 no.29 pp. 23219-23225
ISSN:
0944-1344
Subject:
bromides; bromine; byproducts; chlorine; disinfection; free radicals; humic acids; hydrogen peroxide; hydroxyl radicals; oxidation
Abstract:
... The objective of this research was to compare the transformation of Br⁻ and formation of brominated byproducts in UV/persulfate (PS) and UV/H₂O₂ processes. It was revealed that Br⁻ was efficiently transformed to free bromine which reacted with humic acid (HA) or dihydroxybenzoic acid resulting in the formation of brominated byproducts such as bromoacetic acids (BAAs) in UV/PS system. In contrast, ...
DOI:
10.1007/s11356-017-9935-z

79. Comparative toxicity of Cd, Mo, and W sulphide nanomaterials toward E. coli under UV irradiation

Author:
Enxiang Shang; Junfeng Niu; Yang Li; Yijing Zhou; John Charles Crittenden
Source:
Environmental pollution 2017 v.224 pp. 606-614
ISSN:
0269-7491
Subject:
Escherichia coli; antibacterial properties; bacteria; cadmium; cell walls; hydroxyl radicals; ions; irradiation; molybdenum; molybdenum disulfide; mortality; nanoparticles; phototoxicity; scanning electron microscopes; singlet oxygen; superoxide anion; transmission electron microscopes; tungsten; ultraviolet radiation
Abstract:
... In this study, the phototoxicity of cadmium sulfide (CdS), molybdenum disulfide (MoS2), and tungsten disulfide (WS2) nanoparticles (NPs) toward Escherichia coli (E. coli) under UV irradiation (365 nm) was investigated. At the same mass concentration of NPs, the toxicity of three NPs decreased in the order of CdS > MoS2 > WS2. For example, the death rates of E. coli exposed to 50 mg/L CdS, MoS2, an ...
DOI:
10.1016/j.envpol.2017.02.044

80. Comparison of Direct and Indirect Photolysis in Imazosulfuron Photodegradation

Author:
Rering Caitlin; Williams Katryn; Hengel Matt; Tjeerdema Ronald
Source:
Journal of agricultural and food chemistry 2017 v.65 no.15 pp. 3103-3108
ISSN:
1520-5118
Subject:
dissolved organic matter; dissolved oxygen; fulvic acids; hydroxyl radicals; oxidation; oxygen; paddies; pesticide application; photolysis; photons; rice; singlet oxygen; sulfonylurea herbicides
Abstract:
... Imazosulfuron, a sulfonylurea herbicide used in rice cultivation, has been shown to undergo photodegradation in water, but neither the photochemical mechanism nor the role of indirect photolysis is known. The purpose of this study was to investigate the underlying processes that operate on imazosulfuron during aqueous photodegradation. Our data indicate that in the presence of oxygen, most photoch ...
DOI:
10.1021/acs.jafc.7b00134

81. Comparison of chicoric acid, and its metabolites caffeic acid and caftaric acid: In vitro protection of biological macromolecules and inflammatory responses in BV2 microglial cells

Author:
Qian Liu; Fan Liu; Liling Zhang; Yajie Niu; Zhigang Liu; Xuebo Liu
Source:
Food science and human wellness 2017 v.6 no.4 pp. 155-166
ISSN:
2213-4530
Subject:
antiretroviral agents; caffeic acid; caftaric acid; cell viability; cytochrome P-450; dose response; food science; free radicals; functional foods; herring; humans; hydroxyl radicals; inflammation; ingredients; linoleic acid; lipopolysaccharides; liver microsomes; metabolites; neuroglia; nitric oxide; nutrition; oxidation; peroxidation; plasmids; protective effect; protein degradation; rats; soybeans; spermatozoa
Abstract:
... Chicoric acid (CA), a natural phenolic acid, has been used as a nutraceutical food ingredient due to its powerful antioxidant, anti-HIV and anti-diabetic bioactivities. CA could be partly metabolized into caffeic acid (CFA) and caftaric acid (CTA) on cytochrome P450s in rat liver microsomes. To compare the protective effects of CA and its metabolites on biomolecules and inflammatory responses, oxi ...
DOI:
10.1016/j.fshw.2017.09.001

82. Comparison of gel properties and biochemical characteristics of myofibrillar protein from bighead carp (Aristichthys nobilis) affected by frozen storage and a hydroxyl radical-generation oxidizing system

Author:
Han Lu; Longteng Zhang; Qingzheng Li; Yongkang Luo
Source:
Food chemistry 2017 v.223 pp. 96-103
ISSN:
0308-8146
Subject:
Hypophthalmichthys nobilis; crosslinking; fish fillets; freezing; frozen storage; gels; hardness; hydrogen peroxide; hydrophobicity; hydroxyl radicals; oxidation; polyacrylamide gel electrophoresis; texture; water holding capacity
Abstract:
... We wanted to clarify whether gel properties can be affected by in vivo or in vitro myofibrillar protein oxidation and, thus, to provide relevant information and a scientific foundation for the processing of gel products. To accomplish this, we measured the changes in sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), total disulfide (SS) content, surface hydrophobicity (So-ANS), ...
DOI:
10.1016/j.foodchem.2016.11.143

83. Comparison of the characteristics and mechanism of CO formation in O2/N2, O2/CO2 and O2/H2O atmospheres

Author:
Yizhuo He; Chun Zou; Yu Song; Jianghui Luo; Huiqiao Jia; Wuzhong Chen; Junmei Zheng; Chuguang Zheng
Source:
Energy 2017 v.141 pp. 1429-1438
ISSN:
0360-5442
Subject:
atmospheric pressure; carbon dioxide; free radicals; hydroxyl radicals; methanol; temperature
Abstract:
... The characteristics and mechanisms of CO formation in O2/CO2 and O2/H2O atmospheres were investigated both experimentally and numerically. Comparison experiments in O2/N2, O2/CO2 and O2/H2O atmospheres were performed in a flow reactor at atmospheric pressure covering fuel-rich to fuel-lean equivalence ratios and temperatures from 973 K to 1773 K. Experimental results demonstrated that CO formation ...
DOI:
10.1016/j.energy.2017.11.043

84. Comparison of vascular and non-vascular aquatic plant as indicators of cadmium toxicity

Author:
Jozef Kováčik; Petr Babula; Josef Hedbavny
Source:
Chemosphere 2017 pp. -
ISSN:
0045-6535
Subject:
Ceratophyllum demersum; acute exposure; aquatic plants; ascorbic acid; bioaccumulation; cadmium; catalase; chelation; citric acid; confocal microscopy; enzyme activity; hydrogen peroxide; hydroxyl radicals; indicator species; malic acid; metal ions; mosses and liverworts; oxidative stress; superoxide dismutase; thiols; toxicity
Abstract:
... Antioxidative and microscopic responses in non-vascular (moss Taxiphyllum barbieri) and vascular (Ceratophyllum demersum) aquatic plants exposed to short-term (24 h) cadmium (Cd) excess (10 and 100 μM) were compared. Ceratophyllum considerably accumulated Cd but less pronounced symptoms of oxidative stress were detected by confocal microscopy (at the level of general ROS, hydrogen peroxide, hydrox ...
DOI:
10.1016/j.chemosphere.2017.04.002

85. Compounds isolated from Eriobotrya deflexa leaves protect against ultraviolet radiation B-induced photoaging in human fibroblasts

Author:
Chung-Yu Huang; Yi-Tzu Lin; Hsiang-Chun Kuo; Wen-Fei Chiou; Mei-Hsien Lee
Source:
Journal of photochemistry and photobiology 2017 v.175 pp. 244-253
ISSN:
1011-1344
Subject:
Eriobotrya deflexa; active ingredients; bioactive properties; butanol; collagen; ethanol; ethyl acetate; fibroblasts; free radical scavengers; hexane; humans; hydroxyl radicals; inhibitory concentration 50; irradiation; leaf extracts; leaves; liquid chromatography; mass spectrometry; metalloproteinases; photoaging; quercetin; spectral analysis; traditional medicine; ultraviolet radiation; Taiwan
Abstract:
... Ultraviolet (UV) irradiation leads to skin photoaging because of the upregulation of matrix metalloproteinase (MMP)-1 and downregulation of type I collagen and tissue inhibitor of metalloproteinase (TIMP)-1. Eriobotrya deflexa (Hemsl.) Nakai (Rosaceae) is a flowering plant endemic to Taiwan, and its leaves have been used as an expectorant and in antitussive folk remedy. Our previous studies have d ...
DOI:
10.1016/j.jphotobiol.2017.08.042

86. Comprehensive evaluation of the antioxidant capacity of Perilla frutescens leaves extract and isolation of free radical scavengers using step-wise HSCCC guided by DPPH-HPLC

Author:
Shin Hwa Kwon; Zhiqiang Wang; Seung Hwan Hwang; Young-Hee Kang; Jae-Yong Lee; Soon Sung Lim
Source:
International journal of food properties 2017 v.20 no.sup1 pp. 921-934
ISSN:
1094-2912
Subject:
Perilla frutescens; antioxidant activity; apigenin; caffeic acid; chlorogenic acid; countercurrent chromatography; free radical scavengers; high performance liquid chromatography; hydrogen peroxide; hydroxyl radicals; leaf extracts; luteolin; nitric oxide; protocatechuic acid; rosmarinic acid
Abstract:
... To comprehensively examine the antioxidant capacity of Perilla frutescens leaves extract, eight assays including hydroxyl radical, hydrogen peroxide, ferrous ion-chelating, total antioxidant capacity, nitric oxide, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), 2,2′-diphenyl-1-picrylhydrazyl, and ferrous reducing antioxidant assays were employed. The results indicated that the ethyl aceta ...
DOI:
10.1080/10942912.2017.1318289

87. Comprehensive two-dimensional gas chromatography coupled to high resolution time-of-flight mass spectrometry for screening of organohalogenated compounds in cat hair

Author:
Martin Brits; Peter Gorst-Allman; Egmont R. Rohwer; Jayne De Vos; Jacob de Boer; Jana M. Weiss
Source:
Journal of chromatography 2017 pp. -
ISSN:
0021-9673
Subject:
air; cats; comprehensive two-dimensional gas chromatography; databases; dust; ethane; hairs; hexabromocyclododecane; hydroxyl radicals; mass spectrometry; models; pesticides; pets; phosphates; polybrominated diphenyl ethers; polychlorinated biphenyls; prediction; pyrethrins; risk; screening; toddlers
Abstract:
... The coupling of comprehensive two-dimensional gas chromatography with high-resolution time-of-flight mass spectrometry offers the best separation efficiency combined with accurate mass measurements over a wide mass range. The tremendous power of this screening tool is illustrated by trace qualitative screening analysis of organohalogenated compounds (OHCs) in pet cat hair. Tentative identification ...
DOI:
10.1016/j.chroma.2017.08.055

88. Concentrations of a triplet excited state are enhanced in illuminated ice

Author:
Zeyuan Chen; Cort Anastasio
Source:
Environmental science 2017 v.19 no.1 pp. 12-21
ISSN:
2050-7895
Subject:
biomass; combustion; freezing point; hydroxyl radicals; ice; liquids; oxidants; pH; phenol; photochemical reactions; snow; solutes; surface water; temperature
Abstract:
... Photochemical reactions influence the fates and lifetimes of organic compounds in snow and ice, both through direct photoreactions and via photoproduced transient species such as hydroxyl radical (˙OH) and, perhaps, triplet excited states of organic compounds (i.e., triplets). While triplets can be important oxidants in atmospheric drops and surface waters, little is known of this class of oxidant ...
DOI:
10.1039/c6em00534a

89. Confinement effects on the thermal stability of poly(ethylene oxide)/graphene nanocomposites: A reactive molecular dynamics simulation study

Author:
Farzin Rahmani; Mina Mahdavi; Sasan Nouranian; Ahmed Al‐Ostaz
Source:
Journal of polymer science 2017 v.55 no.13 pp. 1026-1035
ISSN:
0887-6266
Subject:
activation energy; graphene; graphene oxide; hydroxyl radicals; molecular dynamics; nanocomposites; polyethylene glycol; thermal degradation; thermal stability
Abstract:
... Nonisothermal and isothermal decomposition of poly(ethylene oxide) (PEO) loaded with different concentrations of pristine graphene (PG) and graphene oxide (GO) nanoplatelets were investigated using reactive molecular dynamics simulation. The onset of nonisothermal decomposition of the PG‐loaded PEO system was the highest among all systems, suggesting that introducing PG to the polymer improves its ...
DOI:
10.1002/polb.24355

90. Confocal fluorescence mapping of pH profile inside hydrogel beads (microgels) with controllable internal pH values

Author:
Zipei Zhang; Ruojie Zhang; Quancai Sun; Yeonhwa Park; David Julian McClements
Source:
Food hydrocolloids 2017 v.65 pp. 198-205
ISSN:
0268-005X
Subject:
calcium chloride; confocal laser scanning microscopy; cross-linking reagents; dextran; drugs; encapsulation; fluorescein; fluorescence; foods; gastric juice; gelation; hydrocolloids; hydroxyl radicals; ions; magnesium; magnesium hydroxide; microclimate; neutralization; pH; protons
Abstract:
... Hydrogel beads are particularly promising vehicles for the encapsulation, protection, and release of bioactive agents in foods, supplements, and pharmaceuticals. However, most hydrogel beads are highly porous so that their internal pH is typically fairly similar to that of the surrounding solution, which can lead to degradation of encapsulated pH-sensitive bioactives. In this study, hydrogel beads ...
DOI:
10.1016/j.foodhyd.2016.11.018
CHORUS:
10.1016/j.foodhyd.2016.11.018
Chorus Open Access:
10.1016/j.foodhyd.2016.11.018

91. Contributions of vehicular emissions and secondary formation to nitrous acid concentrations in ambient urban air in Tokyo in the winter

Author:
Yoshihiro Nakashima; Yasuhiro Sadanaga; Shinji Saito; Junya Hoshi; Hiroyuki Ueno
Source:
Science of the total environment 2017 pp. -
ISSN:
0048-9697
Subject:
absorption; air; cities; emissions; hydroxyl radicals; nitric oxide; nitrogen dioxide; oxidation; ozone; pollution; relative humidity; roads; spectroscopy; sulfur dioxide; traffic; winter
Abstract:
... Nitrous acid (HONO) plays an important role in the formation of OH radicals, which are involved in photochemical oxidation. HONO concentrations in ambient air at urban sites have previously been measured, but very few studies have been performed in central Tokyo. In this study, HONO concentrations in ambient air in southeast central Tokyo (near Tokyo Bay) in winter were determined by incoherent ca ...
DOI:
10.1016/j.scitotenv.2017.03.122

92. Controllable Preparation and Catalytic Performance of Heterogeneous Fenton-like α-Fe2O3/Crystalline Glass Microsphere Catalysts

Author:
Hongbao Yao; Yu Xie; Yu Jing; Yujun Wang; Guangsheng Luo
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.46 pp. 13751-13759
ISSN:
1520-5045
Subject:
azo dyes; calcium silicate; catalysts; catalytic activity; crystals; decolorization; ferric oxide; glass; gravity; hot water treatment; hydrogen peroxide; hydroxyl radicals; iron; leaching; microparticles; nanoparticles; particle size; process design; recycling; silica
Abstract:
... Highly dispersed α-Fe₂O₃ nanoparticles were immobilized onto crystalline glass microspheres for the first time to be heterogeneous Fenton catalysts (FeCG) with favorable activity. The average particle size of the supported iron oxides ranges from 2.6 to 6.5 nm and can be achieved controllably with great ease. Typically, through hydrothermal treatment, it was found that an amorphous glass support d ...
DOI:
10.1021/acs.iecr.7b03440

93. Controllable Synthesis of Core–Shell Bi@Amorphous Bi2O3 Nanospheres with Tunable Optical and Photocatalytic Activity for NO Removal

Author:
Meijuan Chen; Yan Li; Zhenyu Wang; Yunxia Gao; Yu Huang; Junji Cao; Wingkei Ho; Shuncheng Lee
Source:
Industrial & engineering chemistry process design and development 2017 v.56 no.37 pp. 10251-10258
ISSN:
1520-5045
Subject:
air pollution; free radicals; hydroxyl radicals; irradiation; nanoparticles; nanospheres; nitric oxide; photocatalysis; pollution control; process design; reaction mechanisms; singlet oxygen; superoxide anion
Abstract:
... The size, morphology, and structure of a Bi nanoparticle can significantly affect its photocatalytic performance. In this study, core–shell structured Bi@amorphous Bi₂O₃ nanospheres were synthesized through a one-step solvothermal method, and the reaction mechanisms on NO removal were proposed. It was found that Bi nanoparticles can generate charge carriers by surface plasma resonance (SPR) under ...
DOI:
10.1021/acs.iecr.7b02497

94. Converting Carbohydrates to Carbon-Based Photocatalysts for Environmental Treatment

Author:
Hu Zhuofeng; Shen Zhurui; Yu Jimmy C.
Source:
Environmental Science & Technology 2017 v.51 no.12 pp. 7076-7083
ISSN:
1520-5851
Subject:
biomass; carbon; carbonation; cattle manure; crops; cytotoxicity; disinfection; electrochemistry; electrons; glucose; grasses; hydroxyl radicals; iodine; lighting; photocatalysis; photocatalysts; pollutants; recycling; researchers; rice; solar radiation; starch; straw; sucrose
Abstract:
... Carbohydrates in biomass can be converted to semiconductive hydrothermal carbonation carbon (HTCC), a material that contains plenty of sp²-hybridization structures. Under solar light illumination, HTCC generates photoexcited electrons, holes, and hydroxyl radicals. These species can be used for photocatalytic treatment such as water disinfection and degradation of organic pollutants. The photocata ...
DOI:
10.1021/acs.est.7b00118

95. Copper(I) Chelators for Alzheimer’s Disease

Author:
Stanley K. A. Opare; Arvi Rauk
Source:
Journal of physical chemistry 2017 v.121 no.50 pp. 11304-11310
ISSN:
1520-5207
Subject:
Alzheimer disease; amyloid; binding capacity; chelating agents; copper; hydrogen peroxide; hydroxyl radicals; neurotoxicity; nitrogen; oxygen; physical chemistry; sulfur
Abstract:
... A component of the neurotoxicity of the beta amyloid peptide (Aβ) of Alzheimer’s disease is its ability to generate superoxide, hydrogen peroxide, and hydroxyl radicals by reaction of its reduced copper complex Aβ/Cu⁺ with molecular oxygen. The objective of the present work was to devise compounds, L, that could remove Cu⁺ from Aβ/Cu⁺, with the property that L/Cu⁺ itself would not be capable of re ...
DOI:
10.1021/acs.jpcb.7b10480

96. Copper–catalyzed activation of molecular oxygen for oxidative destruction of acetaminophen: The mechanism and superoxide-mediated cycling of copper species

Author:
Yunfei Zhang; Jinhong Fan; Bo Yang; Wutao Huang; Luming Ma
Source:
Chemosphere 2017 v.166 pp. 89-95
ISSN:
0045-6535
Subject:
acetaminophen; air; copper; hydrogen peroxide; hydroxyl radicals; mineralization; oxygen; pH; superoxide anion
Abstract:
... In this study, the commercial zero-valent copper (ZVC) was investigated to activate the molecular oxygen (O2) for the degradation of acetaminophen (ACT). 50 mg/L ACT could be completely decomposed within 4 h in the ZVC/air system at initial pH 3.0. The H2O2, hydroxyl radical (OH) and superoxide anion radical (O2−) were identified as the main reactive oxygen species (ROSs) generated in the above re ...
DOI:
10.1016/j.chemosphere.2016.09.066

97. Corrosion-Assisted Self-Growth of Au-Decorated ZnO Corn Silks and Their Photoelectrochemical Enhancement

Author:
Zhang Zhuo; Choi Mingi; Baek Minki; Deng Zexiang; Yong Kijung
Source:
ACS Applied Materials & Interfaces 2017 v.9 no.4 pp. 3967-3976
ISSN:
1944-8252
Subject:
aqueous solutions; corrosion; electrons; gold; hydrogen; hydrolysis; hydroxyl radicals; ions; lighting; nanogold; nanorods; nanotubes; silk; zinc; zinc oxide
Abstract:
... Modern nanotechnology generates more stringent requirements for the design and synthetic strategy of nanostructural materials. In this work, we demonstrate a novel strategy for the synthesis of “corn silk”-like ZnO hierarchical nanostructures, simplified as ZnO corn silk: silk-like ZnO nanotubes (NTs) with a large length-to-diameter ratio are grown on the top tip of corn-shaped ZnO nanorods (NRs). ...
DOI:
10.1021/acsami.6b15026

98. Culture broth of Ganoderma lucidum exhibited antioxidant, antibacterial and α-amylase inhibitory activities

Author:
Rakrudee Sarnthima; Saranyu Khammaung; Piyawan Sa-ard
Source:
Journal of food science and technology 2017 v.54 no.11 pp. 3724-3730
ISSN:
0022-1155
Subject:
2,2-diphenyl-1-picrylhydrazyl; DNA damage; Ganoderma lucidum; Pseudomonas aeruginosa; Staphylococcus epidermidis; alpha-amylase; antibacterial properties; antioxidant activity; cosmetics; culture media; free radicals; fruiting bodies; functional foods; hydroxyl radicals; ingredients; inhibitory concentration 50; iron; molecular weight; mycelium; proteins; value added; virulent strains
Abstract:
... Culture broth of Ganoderma lucidum was determined for antioxidant, antibacterial and α-amylase inhibitory activities. The culture broth contained protein as determined by Bradford method equaled to 0.2 mg/ml and total phenol content as 0.078 mg GAE/mg protein (0.557 mg GAE/g extract). It exhibited radicals scavenging activities against ABTS⁺· and DPPH· radicals with a half maximal inhibitory conce ...
DOI:
10.1007/s13197-017-2839-6
PubMed:
29051668
PubMed Central:
PMC5629183

99. Cu₁.₈S-Passivated carbon dots for enhancing photocatalytic activity

Author:
Qing ChangThese authors contributed equally to this work.; Xuejun Han; Chaorui Xue; Jinlong Yang; Shengliang Hu
Source:
Chemical communications 2017 v.53 no.15 pp. 2343-2346
ISSN:
1364-548X
Subject:
benzoquinones; carbon quantum dots; free radicals; hydroxyl radicals; irradiation; phenols; photocatalysis
Abstract:
... To allow low cost and green carbon dots (CDs) to play a central role in photocatalysis, here we present a strategy in which their photocatalytic activities can be significantly improved by combining them with a small amount of Cu₁.₈S. Not only can Cu₁.₈S-passivated CDs more efficiently reduce benzoquinone species to phenols than CDs alone, but can also enhance the formation rate of ˙OH radicals un ...
DOI:
10.1039/c6cc09508a

100. Daily sesame oil supplementation attenuates local renin-angiotensin system via inhibiting MAPK activation and oxidative stress in cardiac hypertrophy

Author:
Chuan-Teng Liu; Ming-Yie Liu
Source:
Journal of nutritional biochemistry 2017 v.42 pp. 108-116
ISSN:
0955-2863
Subject:
acetates; renin-angiotensin system; desoxycorticosterone; lipid peroxidation; renin; mitogen-activated protein kinase; oxidative stress; protective effect; mineral oil; superoxide anion; apoptosis; sesame oil; morbidity; peptidyl-dipeptidase A; models; sodium chloride; rats; drinking water; histopathology; mortality; hydroxyl radicals; cardiomyocytes; hypertrophy
Abstract:
... The renin-angiotensin system (RAS) is involved in the development of left ventricular hypertrophy (LVH) by which increases cardiac morbidity and mortality. Activation of mitogen-activated protein kinases (MAPKs) and oxidative stress are important in RAS-mediated cardiac hypertrophy. Sesame oil, a potent antioxidant, attenuates hypertension-dependent LVH. We examined the protective role of sesame o ...
DOI:
10.1016/j.jnutbio.2016.05.006