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You searched for: Publication Year 2017 Remove constraint Publication Year: 2017 Subject hydroxyl radicals Remove constraint Subject: hydroxyl radicals
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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 Polychoro-1,3-butadienes in Aqueous Solution by Ozone, UV Photolysis, and Advanced Oxidation Processes (O3/H2O2 and UV/H2O2)

Author:
Lee Minju; Merle Tony; Rentsch Daniel; Canonica Silvio; von Gunten Urs
Source:
Environmental Science & Technology 2017 v.51 no.1 pp. 497-505
ISSN:
1520-5851
Subject:
aqueous solutions; byproducts; disinfection; groundwater; hydrogen peroxide; hydroxyl radicals; oxidation; ozonation; ozone; photolysis; photons; toxicity; ultraviolet radiation
Abstract:
... The abatement of 9 polychloro-1,3-butadienes (CBDs) in aqueous solution by ozone, UV–C(254 nm) photolysis, and the corresponding advanced oxidation processes (AOPs) (i.e., O₃/H₂O₂ and UV/H₂O₂) was investigated. The following parameters were determined for 9 CBDs: second-order rate constants for the reactions of CBDs with ozone (kO₃) (<0.1–7.9 × 10³ M–¹ s–¹) or with hydroxyl radicals (k•OH) (0.9 × ...
DOI:
10.1021/acs.est.6b04506

5. 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

6. Absorption of NO and Simultaneous Absorption of SO2/NO Using a Vacuum Ultraviolet Light/Ultrasound/KHSO5 System

Author:
Liu Yangxian; Xu Wen; Zhao Liang; Wang Yan; Zhang Jun
Source:
Energy & Fuels 2017 v.31 no.11 pp. 12364-12375
ISSN:
1520-5029
Subject:
absorption; chemical reactions; flue gas; free radicals; fuels; hydroxyl radicals; light intensity; mass transfer; nitric oxide; ozone; pH; sulfates; temperature; ultrasonics; ultraviolet radiation; wavelengths
Abstract:
... Absorption of NO from flue gas using vacuum ultraviolet (VUV)-light-activated KHSO₅ solution in the presence of ultrasound (US) in a VUV–US reactor was studied. The influencing factors, active species, products, and mechanism of NO removal were investigated. The results indicate that 185 nm is the most effective light wavelength for NO removal. US enhances NO removal as a result of the enhancement ...
DOI:
10.1021/acs.energyfuels.7b01274

7. 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

8. 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

9. Activation of peroxymonosulfate by nitrogen-functionalized sludge carbon for efficient degradation of organic pollutants in water

Author:
Hongwei Sun; Xingxing Peng; Shuping Zhang; Shengwei Liu; Ya Xiong; Shuanghong Tian; Jingyun Fang
Source:
Bioresource technology 2017 v.241 pp. 244-251
ISSN:
0960-8524
Subject:
catalysts; cost effectiveness; electron paramagnetic resonance spectroscopy; graphene; hydroxyl radicals; microstructure; nitrogen; phenol; pollutants; porosity; pyridines; pyrolysis; sewage sludge; singlet oxygen; sulfates
Abstract:
... Nitrogen-functionalized sludge carbon (NSC) was prepared by urea-mediated pyrolysis of sewage sludge (SS) and was introduced, for the first time, as a potential metal-free catalyst to activate peroxymonosulfate (PMS) for oxidative removal of organic pollutants in water. The nitrogen functionalization of NSC catalysts significantly affected the chemical micro-environments as well as microstructures ...
DOI:
10.1016/j.biortech.2017.05.102

10. Activation of peroxymonosulfate by phenols: Important role of quinone intermediates and involvement of singlet oxygen

Author:
Yang Zhou; Jin Jiang; Yuan Gao; Su-Yan Pang; Yi Yang; Jun Ma; Jia Gu; Juan Li; Zhen Wang; Li-Hong Wang; Li-Peng Yuan; Yue Yang
Source:
Water research 2017 v.125 pp. 209-218
ISSN:
0043-1354
Subject:
aniline; catechol; cresols; hydroxyl radicals; hydroxylation; methanol; models; oxidation; pH; parents; phenol; quinones; remediation; resorcinol; singlet oxygen; sulfates
Abstract:
... In this study, the kinetics of reactions of peroxymonosulfate (PMS) with ten model phenols (including phenol, methylphenols, methoxyphenols, and dihydroxybenzenes) were examined. The oxidation kinetics of these phenols by PMS except for catechol and resorcinol showed autocatalysis in alkaline conditions (pH 8.5 and 10), due to the contribution of singlet oxygen (1O2) produced from PMS activation b ...
DOI:
10.1016/j.watres.2017.08.049

11. 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

12. 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

13. 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

14. 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

15. Adsorption process of fluoride from drinking water with magnetic core-shell Ce-Ti@Fe3O4 and Ce-Ti oxide nanoparticles

Author:
Ahmad Abo Markeb; Amanda Alonso; Antoni Sánchez; Xavier Font
Source:
Science of the total environment 2017 v.598 pp. 949-958
ISSN:
0048-9697
Subject:
adsorbents; adsorption; drinking water; fluorides; hydroxyl radicals; models; nanoparticles; oxides; pH; sorption isotherms; thermodynamics
Abstract:
... Synthesized magnetic core-shell Ce-Ti@Fe3O4 nanoparticles were tested, as an adsorbent, for fluoride removal and the adsorption studies were optimized. Adsorption capacity was compared with the synthesized Ce-Ti oxide nanoparticles. The adsorption equilibrium for the Ce-Ti@Fe3O4 adsorbent was found to occur in <15min and it was demonstrated to be stable and efficient in a wide pH range of 5–11 wit ...
DOI:
10.1016/j.scitotenv.2017.04.191

16. Advanced oxidation of preservative agents in H2O2/UVC system – Kinetics study, transformation products and toxicity assessment

Author:
Magdalena Olak-Kucharczyk; Stanisław Ledakowicz
Source:
Journal of hazardous materials 2017 v.333 pp. 348-357
ISSN:
0304-3894
Subject:
aqueous solutions; biphenyl; byproducts; disinfectants; free radical scavengers; hydrogen peroxide; hydroxyl radicals; hydroxylation; isomers; mineralization; moieties; organic carbon; oxidation; pH; phenol; toxicity
Abstract:
... Phenylphenol isomers (hydroxylated derivatives of biphenyl) are widely used as a preservative agents and disinfectants in many branches of industry.This work focuses on removal of phenylphenol isomers from aqueous solution using H2O2/UVC process. The influence of different operating variables such as pH, initial concentration of hydrogen peroxide, initial concentration of target compounds, fluence ...
DOI:
10.1016/j.jhazmat.2017.03.047

17. 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

18. Advances in modifying lignin structures for largely enhancing high-lignin biomass saccharification

Author:
Le Gao; Shulin Chen; Dongyuan Zhang
Source:
Process biochemistry 2017 v.57 pp. 175-180
ISSN:
1359-5113
Subject:
Isoptera; adsorption; biomass; biomimetics; cassava; cellulases; cellulose; chemical treatment; energy; feedstocks; hydroxyl radicals; hydroxylation; lignin; saccharification
Abstract:
... Traditional chemical treatments require high energy and concentrated agents to decrease high-lignin biomass recalcitrance during lignin removal. A low-cost and environment-friendly method via modifying the lignin structure without lignin degradation overcomes lignin barrier in wood-feeding termites. In this study, thermal hydroxyl radicals in the biomimetic system performed in high-lignin cassava ...
DOI:
10.1016/j.procbio.2017.04.005

19. Affinity capillary electrophoresis and density functional theory study of noncovalent interactions of cyclic peptide [Gly6]‐antamanide with small cations

Author:
Sachin Pangavhane; Stanislav Böhm; Emanuel Makrlík; Paolo Ruzza; Václav Kašička
Source:
Electrophoresis 2017 v.38 no.16 pp. 2025-2033
ISSN:
0173-0835
Subject:
Amanita phalloides; ammonium; calcium; capillary electrophoresis; cesium; chlorides; hydroxyl radicals; ionic strength; lithium; methanol; poisonous fungi; regression analysis; rubidium; temperature
Abstract:
... ACE and density functional theory were employed to study the noncovalent interactions of cyclic decapeptide glycine‐6‐antamanide ([Gly⁶]AA), synthetic derivative of native antamanide (AA) peptide from the deadly poisonous fungus Amanita phalloides, with small cations (Li⁺, Rb⁺, Cs⁺, NH₄ ⁺, and Ca²⁺) in methanol. The strength of these interactions was quantified by the apparent stability constants ...
DOI:
10.1002/elps.201700141

20. Aggregated Single-Walled Carbon Nanotubes Absorb and Deform Dopamine-Related Proteins Based on Molecular Dynamics Simulations

Author:
Yu Yi; Sun Huiyong; Gilmore Keith; Hou Tingjun; Wang Suidong; Li Youyong
Source:
ACS applied materials & interfaces 2017 v.9 no.38 pp. 32452-32462
ISSN:
1944-8252
Subject:
active sites; biotechnology; carbon nanotubes; dopamine; drug abuse; hydroxyl radicals; medicine; molecular dynamics; proteins; tritium; tyrosine 3-monooxygenase
Abstract:
... Single-walled carbon nanotubes (SWCNTs) have attracted considerable attention owing to their applications in various fields such as biotechnology and biomedicine. Recently, aggregated SWCNTs have shown more significant effects on the treatment of methamphetamine addiction (Nat. Nanotech. 2016, 11, 613). However, the mechanisms underlying these actions are unclear. By using all-atom molecular dynam ...
DOI:
10.1021/acsami.7b05478

21. Alkali-doped polyvinyl alcohol – Polybenzimidazole membranes for alkaline water electrolysis

Author:
L.A. Diaz; R.E. Coppola; G.C. Abuin; R. Escudero-Cid; D. Herranz; P. Ocón
Source:
Journal of membrane science 2017 v.535 pp. 45-55
ISSN:
0376-7388
Subject:
artificial membranes; crosslinking; diaphragm; electrolysis; electrolytes; glutaraldehyde; hydroxyl radicals; mechanical properties; polyvinyl alcohol; potassium hydroxide; sorption
Abstract:
... We developed an innovative polymer blend system composed of polyvinyl alcohol (PVA) and polybenzimidazole as an anionic membrane for application to zero gap alkaline electrolysers. The challenge was to combine PVA with either poly[2-2′-(m-phenylene)-5-5′-bibenzimidazole] (PBI) or poly (2,5-benzimidazole) (ABPBI) to complement these neutral polymers, which must be doped to conduct, with hydroxyl gr ...
DOI:
10.1016/j.memsci.2017.04.021

22. Alkaline Cellulose Nanofibrils from Streamlined Alkali Treated Rice Straw

Author:
Gu Jin; Hsieh You-Lo
Source:
ACS sustainable chemistry 2017 v.5 no.2 pp. 1730-1737
ISSN:
2168-0485
Subject:
alkali treatment; cellulose; cellulose microfibrils; chlorites; crystal structure; hemicellulose; hydroxyl radicals; leaching; lignin; oxidants; oxidation; rice straw; silica; sodium hydroxide; sodium hypochlorite; thermal stability
Abstract:
... Alkali treatment (4% NaOH, 70 °C, 5 min, twice) of dewaxed rice straw was effective in removing most hemicelluloses, lignin and silica to yield 47.6% cellulose-rich solid. Optimal TEMPO oxidation (7.5 mmol NaClO per gram of alkaline cellulose) followed by mechanical defibrillation (30 min) produced 36.5% alkaline cellulose nanofibrils (ACNFs), higher than the 29.1% CNFs from sodium chlorite oxidat ...
DOI:
10.1021/acssuschemeng.6b02495
CHORUS:
10.1021/acssuschemeng.6b02495

23. 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

24. 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

25. 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

26. Amylase-assisted extraction and antioxidant activity of polysaccharides from Gracilaria lemaneiformis

Author:
Shengjun Wu; Mingsheng Lu; Shujun Wang
Source:
3 Biotech 2017 v.7 no.1 pp. 38
ISSN:
2190-572X
Subject:
Fourier transform infrared spectroscopy; Gracilaria; antioxidant activity; hydroxyl radicals; pH; polysaccharides; temperature; thermal stability
Abstract:
... Gracilaria lemaneiformis (G. lemaneiformis) is rich in polysaccharides that have many functional activities. In this study, the thermostable α-amylase-assisted extraction and antioxidant activity of water-soluble polysaccharides from G. lemaneiformis were investigated. The extraction conditions were optimized as follows: time, 40 min; temperature, 95 °C; pH, 5 and enzyme amount, 6000 U/g, under wh ...
DOI:
10.1007/s13205-017-0697-6
PubMed:
28439812
PubMed Central:
PMC5403771

27. Anchoring 20(R)-Ginsenoside Rg3 onto Cellulose Nanocrystals To Increase the Hydroxyl Radical Scavenging Activity

Author:
Tang Chunxia; Wang Yulong; Long Yunduo; An Xingye; Shen Jing; Ni Yonghao
Source:
ACS sustainable chemistry 2017 v.5 no.9 pp. 7507-7513
ISSN:
2168-0485
Subject:
X-ray diffraction; antioxidant activity; bioavailability; cellulose; charge characteristics; drugs; hydrophobicity; hydroxyl radicals; hydroxylation; infrared spectroscopy; nanocomposites; nanocrystals; oxidation; particle size; salicylic acid; surface area; transmission electron microscopy
Abstract:
... Cellulose nanocrystals (CNCs) exhibit attractive properties as carriers for bioactive molecules, including their large surface area, charge characteristics, and abundant surface hydroxyl groups, among others. In this study, we used CNCs as carriers for a hydrophobic drug, 20(R)-ginsenoside Rg3 (here abbreviated as 20(R)-Rg3), to improve its bioavailability, dispersity, and antioxidation activity i ...
DOI:
10.1021/acssuschemeng.6b02996

28. 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

29. Anomalous Photocatalytic Activity of Nanocrystalline γ-Phase Ga2O3 Enabled by Long-Lived Defect Trap States

Author:
Ghodsi Vahid; Jin Susi; Byers Joshua C.; Pan Yi; Radovanovic Pavle V.
Source:
The Journal of Physical Chemistry C 2017 v.121 no.17 pp. 9433-9441
ISSN:
1932-7455
Subject:
annealing; crystal structure; free radicals; hydroxyl radicals; nanocrystals; oxidation; oxides; oxygen; photocatalysis; photocatalysts; photoluminescence; semiconductors; superoxide anion; toxicity; wastewater treatment
Abstract:
... Semiconductor photocatalysis has emerged as an efficient and sustainable advanced oxidation process for wastewater treatment and other environmental remediation and forms the basis for water splitting and solar-to-fuel conversion. Nanocrystalline metal oxides are particularly promising photocatalysts because of their efficiency, stability, and low toxicity. However, the influence of the crystal st ...
DOI:
10.1021/acs.jpcc.7b02275

30. Antiageing activities of water-soluble chitosan from Clanis bilineata larvae

Author:
Shengjun Wu; Mingsheng Lu; Shujun Wang
Source:
International journal of biological macromolecules 2017 pp. -
ISSN:
0141-8130
Subject:
dose response; hydroxyl radicals; humans; malondialdehyde; chitosan; superoxide dismutase; mice; glutathione peroxidase; animal models; larvae; superoxide anion; antioxidant activity; dietary supplements
Abstract:
... Water extracts were prepared using water-soluble chitosan from Clanis bilineata larva skin. This study also investigated antioxidant and antiageing activities of water-soluble chitosan. Water-soluble chitosan of Clanis bilineata larva skin (CBLSWSC) showed considerable scavenging activities on superoxide anion and hydroxyl radicals and reducing capacity. Different doses of CBLSWSC were intragastri ...
DOI:
10.1016/j.ijbiomac.2017.04.038

31. 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

32. Antimicrobial activity against Gram-positive and Gram-negative bacteria during gatifloxacin degradation by hydroxyl radicals

Author:
Marlon Caianelo; Caio Rodrigues-Silva; Milena Guedes Maniero; José Roberto Guimarães
Source:
Environmental science and pollution research international 2017 v.24 no.7 pp. 6288-6298
ISSN:
0944-1344
Subject:
Gram-negative bacteria; Vibrio fischeri; acute toxicity; antimicrobial properties; aqueous solutions; drugs; fluoroquinolones; free radicals; hydrogen peroxide; hydroxyl radicals; irradiation
Abstract:
... Gatifloxacin, an antimicrobial drug belonging to the fluoroquinolone family, is active against Gram-positive and Gram-negative bacteria and is extensively used for the control of infections in humans. The presence of the drug in environmental matrices has already been reported. This study investigated the degradation of gatifloxacin in water by hydroxyl radicals generated by the UV₂₅₄ ₙₘ/H₂O₂ proc ...
DOI:
10.1007/s11356-016-6972-y

33. Antimicrobial activity and acute toxicity of ozonated lomefloxacin solution

Author:
Amanda Marchi Duarte de Oliveira; Milena Guedes Maniero; Caio Rodrigues-Silva; José Roberto Guimarães
Source:
Environmental science and pollution research international 2017 v.24 no.7 pp. 6252-6260
ISSN:
0944-1344
Subject:
Escherichia coli; Vibrio fischeri; acute toxicity; antimicrobial properties; drugs; humans; hydroxyl radicals; lomefloxacin; microorganisms; oxidants; oxidation; ozonation; ozone; pH; risk
Abstract:
... Lomefloxacin (LOM) is a synthetic antimicrobial from the fluoroquinolone family (FQ) used as a veterinary and human drug. Once in the environment, LOM may pose a risk to aquatic and terrestrial microorganisms due to its antimicrobial activity. This study evaluated the effect of ozonation of LOM (500 μg L⁻¹), the residual antimicrobial activity against Escherichia coli and acute toxicity against Vi ...
DOI:
10.1007/s11356-016-8319-0

34. 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

35. 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

36. 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

37. 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

38. Antioxidant Activity of Brown Seaweeds

Author:
Kajal Chakraborty; Anusree Maneesh; Fasina Makkar
Source:
Journal of aquatic food product technology 2017 v.26 no.4 pp. 406-419
ISSN:
1547-0636
Subject:
2,2-diphenyl-1-picrylhydrazyl; Anthophycus longifolius; Sargassum; antioxidant activity; dietary supplements; ethyl acetate; free radicals; functional foods; humans; hydrogen peroxide; hydroxyl radicals; inhibitory concentration 50; iron; macroalgae; phenolic acids; reversed-phase high performance liquid chromatography; shelf life; solvents; India
Abstract:
... Antioxidant potential of three brown seaweeds, Anthophycus longifolius, Sargassum plagiophyllum , and Sargassum myriocystum , obtained from the Gulf of Mannar region of India were evaluated utilizing different in vitro systems. Ethyl acetate (EtOAc) fraction of Anthophycus longifolius registered significantly greater hydroxyl radical scavenging ability (IC ₅₀ 0.19 mg/mL) and was effective in stabi ...
DOI:
10.1080/10498850.2016.1201711

39. 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

40. Antioxidant activities of aqueous extracts from 12 Chinese edible flowers in vitro and in vivo

Author:
Feng Wang; Miao Miao; Hui Xia; Li-Gang Yang; Shao-Kang Wang; Gui-Ju Sun
Source:
Food & nutrition research 2017 v.61 no.1 pp. 1265324
ISSN:
1654-661X
Subject:
Carthamus tinctorius; Chrysanthemum indicum; Chrysanthemum morifolium; Lonicera japonica; Magnolia officinalis; Rosa rugosa; Rosmarinus officinalis; blood serum; edible flowers; endothelial cells; high fat diet; hydroxyl radicals; hyperlipidemia; malondialdehyde; models; oxidative stress; oxidative toxicity; oxygen radical absorbance capacity; peroxidase; rats; screening; superoxide anion; superoxide dismutase
Abstract:
... The antioxidant function of edible flowers have attracted increasing interest. However, information is lacking on the impact of edible flowers on oxidative injury including hypoxia-re-oxygenation and hyperlipidemia. The antioxidant activities of aqueous extracts from 12 Chinese edible flowers were assessed in four different antioxidant models, including total antioxidant capacity (TAC), oxygen rad ...
DOI:
10.1080/16546628.2017.1265324

41. 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

42. 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

43. 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

44. Antioxidant and Antibacterial Properties of Essential Oil Extracted from an Edible Seaweed Undaria Pinnatifida

Author:
Jayanta Kumar Patra; Se‐Weon Lee; Jae Gyu Park; Kwang‐Hyun Baek
Source:
Journal of food biochemistry 2017 v.41 no.1 pp. -
ISSN:
0145-8884
Subject:
Undaria pinnatifida; antibacterial properties; antibiotics; antioxidant activity; bacteria; bioactive compounds; cosmetics; edible seaweed; erythritol; essential oils; food additives; food preservation; food processing; gas chromatography; health hazards; hydroxyl radicals; inhibitory concentration 50; macroalgae; mass spectrometry; medicinal properties; palmitic acid; superoxide anion; volatile compounds
Abstract:
... This study was conducted to extract essential oil from an edible seaweed, Undaria pinnatifida, and determine its chemical constituents, antibacterial and antioxidant potential. Gas chromatography and mass spectroscopy analysis of the U. pinnatifida essential oil (UPEO) revealed 26 volatile compounds comprising a total of 97.03%. Fatty acids such as tetradecanoic acid (31.32%) and hexadecanoic acid ...
DOI:
10.1111/jfbc.12278

45. 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

46. 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

47. 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

48. Antioxidant and hepatoprotective potential of Lawsonia inermis L. leaves against 2-acetylaminofluorene induced hepatic damage in male Wistar rats

Author:
Manish Kumar; Paramjeet Kaur; Madhu Chandel; Amrit Pal Singh; Arpana Jain; Satwinderjeet Kaur
Source:
BMC complementary and alternative medicine 2017 v.17 no.1 pp. 56
ISSN:
1472-6882
Subject:
Lawsonia inermis; alternative medicine; antioxidant activity; bacterial infections; body weight; chemical constituents of plants; histopathology; hydroxyl radicals; inflammation; inhibitory concentration 50; jaundice; leaves; lipid peroxidation; liver; males; protective effect; rats; skin diseases
Abstract:
... BACKGROUND: Lawsonia inermis (Lythraceae) is an ethnomedicinal plant, traditionally known for curing several ailments such as skin diseases, bacterial infections, jaundice, renal lithiases and inflammation etc. The present work deals with assessment of in vitro antioxidant and in vivo hepatoprotective potential of butanolic fraction (But-LI) of Lawsonia inermis L. leaves. METHODS: Antioxidant acti ...
DOI:
10.1186/s12906-017-1567-9
PubMed:
28100199
PubMed Central:
PMC5242058

49. 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

50. 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