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1. Anticancer, antioxidant, and antimicrobial properties of solvent extract of Lobophora variegata through in vitro and in silico studies with major phytoconstituents

Author:
Nithya Palaniappan; Balamuralikrishnan Balasubramanian; Malaisamy Arunkumar; Karthika Pushparaj; Kannan R.R. Rengasamy; Viji Maluventhen; Murugan Pitchai; Jowaher Alanazi; Wen-Chao Liu; Arumugam Maruthupandian
Source:
Food bioscience 2022 v.48 pp. 101822
ISSN:
2212-4292
Subject:
Enterococcus faecalis; Escherichia coli; Gibbs free energy; Lobophora variegata; Pseudomonas aeruginosa; Staphylococcus aureus; antibacterial properties; antioxidant activity; biofilm; chemical constituents of plants; colorectal neoplasms; computer simulation; computer software; cytotoxicity; dietary supplements; flavonoids; free radicals; human cell lines; humans; hydroxyl radicals; methanol; phenol; phthalic acid; solvents
Abstract:
... Seaweeds possess a wide range of bioactive compounds which have been play a vital role in production of novel pharmaceutical and nutraceutical products resources. The present study employed in silico molecular docking to characterize the biomedical potential of brown seaweed Lobophora variegata through antibacterial, antibiofilm, antioxidant and anticancer activities. The antibacterial activity of ...
DOI:
10.1016/j.fbio.2022.101822

2. Assessing the source of the photochemical formation of hydroxylating species from dissolved organic matter using model sensitizers

Author:
Kylie Couch; Frank Leresche; Claire Farmer; Garrett McKay; Fernando L. Rosario-Ortiz
Source:
Environmental science 2022 v.24 no.1 pp. 102-115
ISSN:
2050-7895
Subject:
benzene; benzoic acid; dissolved organic matter; environmental science; hydroxyl radicals; hydroxylation; irradiation; methanol; phenol; photolysis; quinones; salicylic acid; singlet oxygen
Abstract:
... Dissolved organic matter (DOM) is ubiquitous in natural waters and can facilitate the chemical transformation of many contaminants through the photochemical production of reactive intermediates, such as singlet oxygen (¹O₂), excited triplet state DOM (³DOM*), and hydroxylating species (˙OH and other intermediates of similar reaction chemistry). The formation mechanism of most reactive intermediate ...
DOI:
10.1039/d1em00345c

3. Phytochemical Contents and in Vitro Antioxidant Activities of Aqueous, Hydroalcoholic and Methanolic Extracts of Shankhapushpi (Clitoria Ternatea. L) Plant Cultivated under Polyhouse and Open Field Conditions

Author:
Lijini Kundu Raju; Gayathri Kanhoor Mana; Sulaiman Cheruthazhakkatt; Sadheeshna Kumari Sarojini; Indira Balachandran
Source:
Journal of herbs, spices & medicinal plants 2022 v.28 no.3 pp. 217-236
ISSN:
1540-3580
Subject:
Clitoria ternatea; antioxidant activity; flavonoids; hydroxyl radicals; methanol; quantitative analysis; secondary metabolites; solvents; triterpenoids
Abstract:
... Shankhapushpi (Clitoria ternatea) grown under polyhouse and open-field conditions were investigated for physicochemical parameters of their powdered samples, qualitative and quantitative analysis of phytochemicals, antioxidant capacities and development of chemical profiles using solvent extracts in methanol, hydroalcoholic and water. The two samples were similar in their physicochemical parameter ...
DOI:
10.1080/10496475.2022.2045662

4. Phytochemical Screening, Antioxidant and Antifungal Activities of Aconitum chasmanthum Stapf ex Holmes Wild Rhizome Extracts

Author:
Shah Rafiq; Nasir Aziz Wagay; Hosam O. Elansary; Mansoor Ahmad Malik; Irshad Ahmad Bhat; Zahoor Ahmad Kaloo; Abdul Hadi; Abed Alataway; Ahmed Z. Dewidar; Ahmed M. El-Sabrout; Kowiyou Yessoufou; Eman A. Mahmoud
Source:
Antioxidants 2022 v.11 no.6 pp. -
ISSN:
2076-3921
Subject:
Aconitum; Aspergillus flavus; Aspergillus niger; Penicillium chrysogenum; antifungal properties; antioxidant activity; culture filtrates; ethyl acetate; flavonoids; hexane; hydroxyl radicals; medicinal plants; methanol; minimum inhibitory concentration; rhizomes; superoxide anion; Himalayan region; India
Abstract:
... Aconitum chasmanthum Stapf ex Holmes, an essential and critically endangered medicinal plant from Kashmir Himalayas, was studied for its antioxidant and antifungal properties. The shade-dried powdered rhizome was extracted sequentially with hexane, ethyl acetate, and methanol. These subsequent fractions were evaluated for total phenolic content (TPC); total flavonoid content (TFC); antioxidant ass ...
DOI:
10.3390/antiox11061052

5. Analysis of phytochemical constituents, antibacterial, antioxidant, photoprotective activities and cytotoxic effect of leaves extracts and fractions of Aloe vera

Author:
Samira Bendjedid; Sabrina Lekmine; Aicha Tadjine; Radia Djelloul; Chawki Bensouici
Source:
Biocatalysis and agricultural biotechnology 2021 v.33 pp. 101991
ISSN:
1878-8181
Subject:
Aloe vera; Artemia; Bacillus cereus; Escherichia coli; acetone; agar; agricultural biotechnology; antibacterial properties; antioxidant activity; biocatalysis; butanol; chloroform; cytotoxicity; death; ethyl acetate; hydroxyl radicals; methanol; phytochemicals; radiation resistance
Abstract:
... The aim of the study was to investigate the Aloe vera phytochemical compounds using HPLC–mass spectrometry and to evaluate their antibacterial, antioxidant, photoprotective and cytotoxic activities. The acetone extract, methanol extract and its four fractions: chloroform, ethyl acetate, n- butanol, aqueous were subjected to evaluate their antibacterial activity by Aromatogram method against S.aure ...
DOI:
10.1016/j.bcab.2021.101991

6. Antioxidant and antimicrobial activities and UPLC-ESI-MS/MS polyphenolic profile of sweet orange peel extracts

Author:
Mohamed G. Shehata; Tarek S. Awad; Dalal Asker; Sobhy A. El Sohaimy; Nourhan M. Abd El- Aziz; Mohammed M. Youssef
Source:
Current research in food science 2021 v.4 pp. 326-335
ISSN:
2665-9271
Subject:
Citrus; anti-infective agents; antimicrobial properties; catechol; cost effectiveness; ethanol; food preservation; grapefruits; hesperetin; hydroxyl radicals; lemons; methanol; naringenin; naringin; orange peels; oranges; oxidative stability; polyphenols; quinic acid; research; solvents; storage quality; tangerines; vegetables
Abstract:
... With growing consumer awareness, exploitation of renewable resources is cost-effective and environment friendly. This work examines the potential of citrus peels as natural antioxidants and antimicrobials for food preservation. Extraction yield, total soluble phenols and flavonoids of various citrus peels (sweet orange, lemon, tangerine and grapefruit) were optimized by varying the solvent type. W ...
DOI:
10.1016/j.crfs.2021.05.001

7. Chemical constituents and antioxidative, anti-inflammatory and anti-proliferative activities of wild and cultivated Corydalis saxicola

Author:
Guoyong Xie; Shuyi Jin; Hongting Li; Mingkun Ai; Feng Han; Yiqun Dai; Wei Tao; Yan Zhu; Yucheng Zhao; Minjian Qin
Source:
Industrial crops and products 2021 v.169 pp. 113647
ISSN:
0926-6690
Subject:
Corydalis; alkaloids; colorimetry; flavonoids; hydroxyl radicals; inflammation; interleukin-6; lipopolysaccharides; macrophages; medicinal plants; methanol; necrosis; neoplasms; nitric oxide; pain; response surface methodology; traditional medicine; ultrasonics; China
Abstract:
... The study aimed to investigate the similarities and differences in the chemical constituents and biological activities between wild and cultivated Corydalis saxicola Bunting. Corydalis saxicola is a rare traditional medicine and is mainly distributed in southwest China. The plant is used for treating inflammation, pain, tumors, and other diseases. The extractive process was optimized and chemical ...
DOI:
10.1016/j.indcrop.2021.113647

8. Comparative Study on Phytochemical Profile and Antioxidant Activity of an Epiphyte, Viscum album L. (White Berry Mistletoe), Derived from Different Host Trees

Author:
Mahak Majeed; Tanveer Bilal Pirzadah; Manzoor Ahmad Mir; Khalid Rehman Hakeem; Hesham F. Alharby; Hameed Alsamadany; Atif A. Bamagoos; Reiaz Ul Rehman
Source:
Plants 2021 v.10 no.6 pp. -
ISSN:
2223-7747
Subject:
Juglans regia; Populus ciliata; Ulmus; Viscum album; antioxidant activity; chemical constituents of plants; comparative study; epiphytes; ethanol; flavonoids; host plants; hydroxyl radicals; leaves; methanol; solvents; superoxide anion; trees
Abstract:
... The study aimed at evaluating the antioxidant profile of a medicinal epiphyte Viscum album L. harvested from three tree species, namely, Populus ciliata L, Ulmus villosa L., and Juglans regia L. The crude extracts were obtained with ethanol, methanol, and water and were evaluated for the total phenol content (TPC), total flavonoid content (TFC), and antioxidant activities using total reducing powe ...
DOI:
10.3390/plants10061191

9. Construction of Proton Transport Highways Induced by Polarity-Driving in Proton Exchange Membranes to Enhance the Performance of Fuel Cells

Author:
Jialin Li; Xuzhou Tian; Chunlei Xia; Yuting Duan; Yi-nan Sun; Binghui Liu; Liming Wu; Chunyu Ru; Shi-Tong Zhang; Chengji Zhao
Source:
ACS applied materials & interfaces 2021 v.13 no.34 pp. 40673-40684
ISSN:
1944-8252
Subject:
activation energy; density functional theory; dissociation; energy; fuel cells; hydrophilicity; hydrophobicity; hydroxyl radicals; methanol; probability; transmission electron microscopy
Abstract:
... The approach to constructing proton transport channels via direct adjustments, including hydrophilia and analytical acid concentration in hydrophilic domains, has been proved to be circumscribed when encouraging the flatter hydrophilic–hydrophobic microphase separation structures and reducing conductivity activation energy. Here, we propose a constructive solution by regulating the polarity of hyd ...
DOI:
10.1021/acsami.1c11715

10. Formation of transformation products during ozonation of secondary wastewater effluent and their fate in post-treatment: From laboratory- to full-scale

Author:
Rebekka Gulde; Moreno Rutsch; Baptiste Clerc; Jennifer E. Schollée; Urs von Gunten; Christa S. McArdell
Source:
Water research 2021 v.200 pp. 117200
ISSN:
0043-1354
Subject:
acetates; activated carbon; expert opinion; filtration; hydroxyl radicals; liquid chromatography; methanol; organic matter; ozonation; ozone; pollutants; research; sand; sand filters; wastewater; wastewater treatment; water
Abstract:
... Ozonation is increasingly applied in water and wastewater treatment for the abatement of micropollutants (MPs). However, the transformation products formed during ozonation (OTPs) and their fate in biological or sorptive post-treatments is largely unknown. In this project, a high-throughput approach, combining laboratory ozonation experiments and detection by liquid chromatography high-resolution ...
DOI:
10.1016/j.watres.2021.117200

11. Highly selective oxidation of organic contaminants in the RuIII-activated peroxymonosulfate process: The dominance of RuV[dbnd]O species

Author:
Yang Zong; Hua Zhang; Xiaomeng Zhang; Yufei Shao; Yunqiao Zeng; Wenjie Ji; Longqian Xu; Deli Wu
Source:
Chemosphere 2021 v.285 pp. 131544
ISSN:
0045-6535
Subject:
2,4,6-trichlorophenol; acetaminophen; atrazine; benzoic acid; diclofenac; dimethyl sulfoxide; hydroxyl radicals; ibuprofen; methanol; nitrobenzoic acids; oxidation; pH; ruthenium; sulfamethoxazole; sulfates; sulfoxides
Abstract:
... Ruthenium (Ruᴵᴵᴵ)-activated peroxymonosulfate (the Ruᴵᴵᴵ/PMS process) is one of the most efficient PMS-based advanced oxidation processes for the abatement of organic contaminants. Here we interestingly found that phenyl methyl sulfoxide (PMSO) was significantly oxidized to phenyl methyl sulfone (PMSO₂) in the Ruᴵᴵᴵ/PMS process at the pH range of 3.0–6.0, with the conversion ratio of ΔPMSO to ΔPMS ...
DOI:
10.1016/j.chemosphere.2021.131544

12. Optimization of extraction process and antioxidant activities of saponins from Camellia fascicularis leaves

Author:
Xiang Hu; Jun-rong Tang; Gui-liang Zhang; Jia Deng; Huan Kan; Ying-jun Zhang; Ping Zhao; Yun Liu
Source:
Journal of food measurement & characterization 2021 v.15 no.2 pp. 1889-1898
ISSN:
2193-4126
Subject:
2,2-diphenyl-1-picrylhydrazyl; Camellia fascicularis; antioxidant activity; dose response; experimental design; hydroxyl radicals; measurement; methanol; porous media; saponins; solvents; temperature; ultrasonics
Abstract:
... Saponins from Camellia fascicularis leaves, which ultrasonic-assisted extraction process parameters were optimized with Box–Behnken design and antioxidant activities were assessed, were reported in this study. The highest yield of crude saponins was up to 3.68% when the optimal extraction conditions were ratio of solvent to solid of 52.1 mL/g, methanol concentration of 71.1%, and ultrasonic temper ...
DOI:
10.1007/s11694-020-00754-0

13. Phytochemical analysis by UPLC-QTOF-MS/MS and evaluation of antioxidant and anti-inflammatory activities of the extract and fractions from flowers of Cochlospermum vitifolium

Author:
Maria José Sarmento-Filha; Manoela Torres-Rêgo; Alessandra Daniele-Silva; Moacir Fernandes de Queiroz-Neto; Hugo Alexandre Oliveira Rocha; Celso Amorim Camara; Renata Mendonça Araújo; Arnóbio Antônio da Silva-Júnior; Tania Maria Sarmento Silva; Matheus de Freitas Fernandes-Pedrosa
Source:
South African journal of botany 2022 v.148 pp. 293-306
ISSN:
0254-6299
Subject:
Cochlospermum; air; air pouch model; anti-inflammatory activity; antioxidant activity; edema; ethyl acetate; hepatitis; hexane; hydrazine; hydroxyl radicals; hyperglycemia; hypertension; interleukin-6; iron; jaundice; medicinal plants; methanol; phytochemicals
Abstract:
... Cochlospermum vitifolium (pacotê) is a medicinal plant used for treatment of hypertension, hepatitis, jaundice, hyperglycemia and inflammatory disorders. This study aimed to identify compounds present in ethanolic extract (EtOH) and hexane (Hex), ethyl acetate (EtOAc) and methanol/water (MeOH) fractions from C. vitifolium flowers and evaluate the antioxidant and anti-inflammatory potential. The ph ...
DOI:
10.1016/j.sajb.2022.04.046

14. Removal of pathogen and antibiotic resistance genes from waste activated sludge by different pre-treatment approaches

Author:
Min Wang; Huiping Chen; Shulei Liu; Lin Xiao
Source:
Science of the total environment 2021 v.763 pp. 143014
ISSN:
0048-9697
Subject:
Escherichia coli; acidification; activated sludge; anodes; antibiotic resistance; environment; hydroxyl radicals; kinetics; methanol; pathogens; public health; regrowth; ultrasonic treatment; wastewater treatment
Abstract:
... In wastewater treatment plants, most of the pathogens and antibiotic resistant genes (ARGs) transferred into and concentrated in waste activated sludge (WAS), which would cause severe public health risks. In this study, the capabilities of several WAS pre-treatment approaches to inactivate coliforms/E. coli and ARGs, as well as the subsequent regrowth of coliforms/E. coli and ARGs/intI1 in treated ...
DOI:
10.1016/j.scitotenv.2020.143014

15. The pharmaceutical potential of crude ethanol leaf extract of Pedalium murex (L.)

Author:
Mathiyazhagan Narayanan; Arunachalam Kiran; Devarajan Natarajan; Sabariswaran Kandasamy; Sabarathinam Shanmugam; Maha Alshiekheid; Hesham S. Almoallim; Arivalagan Pugazhendhi
Source:
Process biochemistry 2022 v.112 pp. 234-240
ISSN:
1359-5113
Subject:
2,2-diphenyl-1-picrylhydrazyl; Corynebacterium; Staphylococcus aureus; Streptococcus pyogenes; antibacterial properties; antioxidant activity; cell death; cell lines; cytotoxicity; drugs; ethanol; flavonoids; humans; hydroxyl radicals; kidneys; leaf extracts; leaves; methanol; minimum inhibitory concentration; quinones; saponins; solvents; terpenoids; toxicity testing
Abstract:
... The purpose of this study was to determine the antibacterial competence of various solvent leaf extracts of Pedalium murex against bacteria that cause skin infections such as Staphylococcus aureus, (folliculitis), Streptococcus pyogenes (impetigo), and Corynebacterium sp. (pitted keratolysis). The presence of phytochemicals, antioxidant activity, and cytotoxicity on the Human Embryonic Kidney (HEK ...
DOI:
10.1016/j.procbio.2021.12.003

16. Antioxidant and enzyme-inhibitory activity of extracts from Erigeron annuus flower

Author:
Luyun Zhang; Qian Xu; Li Li; Lu Lin; Junlin Yu; Junyi Zhu; Hui Zhang; Guangqing Xia; Hao Zang
Source:
Industrial crops and products 2020 v.148 pp. 112283
ISSN:
0926-6690
Subject:
2,2-diphenyl-1-picrylhydrazyl; Erigeron annuus; acetone; alpha-amylase; alpha-glucosidase; antioxidant activity; carbohydrate content; cations; chloroform; electrospray ionization mass spectrometry; enzyme inhibition; enzyme inhibitors; ethanol; ethyl acetate; flavonoids; flowers; free radicals; hexane; high performance liquid chromatography; human cell lines; human nutrition; hydroxyl radicals; infrared spectroscopy; ingredients; iron; methanol; nuclear magnetic resonance spectroscopy; solvents; sublimation; toxicity; traditional medicine
Abstract:
... Erigeron annuus (L.) Pers. has been used in folk medicine for the treatment of several diseases. To develop and apply it, we report (for the first time) the antioxidant, enzyme-inhibitory activities, and toxicity of various solvent extracts from Erigeron annuus flower (EAF). The EAF was extracted using seven solvents (water, methanol, ethanol, acetone, ethyl acetate, chloroform, and hexane) to obt ...
DOI:
10.1016/j.indcrop.2020.112283

17. Antioxidant mediated protective effect of Bridelia tomentosa leaf extract against carbofuran induced oxidative hepatic toxicity

Author:
Milon Mondal; Md. Sakib Hossen; Mohammad Asikur Rahman; Sushmita Saha; Chandan Sarkar; Nikhil Chandra Bhoumik; Sukalyan Kumar Kundu
Source:
Toxicology reports 2021 v.8 pp. 1369-1380
ISSN:
2214-7500
Subject:
Bridelia; alanine transaminase; albumins; alkaline phosphatase; antioxidant enzymes; aspartate transaminase; bilirubin; blood serum; carbofuran; catalase; creatinine; dose response; gallic acid; globulins; glutathione peroxidase; high performance liquid chromatography; histopathology; hydrogen peroxide; hydroxyl radicals; lactate dehydrogenase; leaf extracts; leaves; lipid composition; malondialdehyde; medicinal plants; methanol; naringin; nitric oxide; poisoning; protective effect; protein content; salicylic acid; superoxide dismutase; tannins; toxicity; toxicology; urea; uric acid
Abstract:
... Bridelia tomentosa (B. tomentosa) is a traditional medicinal plant for treating diverse ailments. Hence, we designed our study to scrutinize the protective effect of the methanol extract of B. tomentosa leaf (BTL) against carbofuran-induced oxidative stress-mediated hepato-toxicity in Sprague-Dawley rats for the first time, along with the identification and quantification of phenolic acids and fla ...
DOI:
10.1016/j.toxrep.2021.07.003

18. Anti‐inflammatory and antioxidant effects of Apium graveolens L. extracts mitigate against fatal acetaminophen‐induced acute liver toxicity

Author:
Ayat M. Emad; Sherifa F. Ali; Engy A. Abdel‐Rahman; Meselhy R. Meselhy; Mohamed A. Farag; Sameh S. Ali; Essam A. Abdel‐Sattar
Source:
Journal of food biochemistry 2020 v.44 no.10 pp. e13399
ISSN:
0145-8884
Subject:
Apium graveolens; acetaminophen; antioxidant activity; blood serum; celery; electron paramagnetic resonance spectroscopy; flavonoids; glutathione; hepatotoxicity; hydroxyl radicals; inflammation; liver; liver failure; liver transplant; methanol; morbidity; mortality; oxidative stress; pathogenesis; phenolic compounds; root extracts; secondary metabolites; secretion; weight loss
Abstract:
... In the present work, antioxidant activity, total phenolics (TP), and total flavonoids (TF) contents of aqueous and methanol extracts of celery were determined, in addition to untargeted metabolites profiling its methanol celery root extract (MCRE) via UPLC‐MS. Although MCRE exhibited the lowest TPC and TFC levels, it presented the most potential hydroxyl radical quenching effect using electron par ...
DOI:
10.1111/jfbc.13399

19. Bio-guided isolation of new phenolic compounds from Hippocrepis emerus flowers and investigation of their antioxidant, tyrosinase and elastase inhibitory activities

Author:
Marie Schmitt; Abdulmagid Alabdul Magid; Jane Hubert; Nicolas Etique; Laurent Duca; Laurence Voutquenne-Nazabadioko
Source:
Phytochemistry letters 2020 v.35 pp. 28-36
ISSN:
1874-3900
Subject:
2,2-diphenyl-1-picrylhydrazyl; Hippocrepis; antioxidant activity; carbon; elastase; enzyme inhibition; ethyl acetate; flowers; glycosides; glycosylation; humans; hydroxyl radicals; methanol; mushrooms; neutrophils; nuclear magnetic resonance spectroscopy; quercetin; screening; shrubs; solvents; stable isotopes
Abstract:
... This study presents the bio-guided chemical investigation of a 80% methanol extract of Hippocrepis emerus flowers, a perennial non-climbing shrub. Liquid-liquid partitioning in solvents of increasing polarity combined to biological screening enabled to determine the EtOAc and n-BuOH soluble fractions as the most active parts of the extract. These fractions were chemically profiled by using a ¹³C N ...
DOI:
10.1016/j.phytol.2019.10.014

20. Comparative evaluation on chemical composition, in vitro antioxidant, antidiabetic and antibacterial activities of various solvent extracts of Dregea volubilis leaves

Author:
Singamoorthy Amalraj; Veemarasu Mariyammal; Ramar Murugan; Shailendra S. Gurav; Jayaraj Krupa; Muniappan Ayyanar
Source:
South African journal of botany 2021 v.138 pp. 115-123
ISSN:
0254-6299
Subject:
Escherichia coli; agar; alpha-amylase; antibacterial properties; antioxidant activity; assays; asthma; correlation; cough; dietary supplements; diffusion; ethyl acetate; extracts; flavonoids; free radical scavengers; glycemic effect; hydroxyl radicals; in vitro studies; industry; ingredients; leaves; medicinal plants; methanol; neoplasms; nitric oxide; oleic acid; pain; palmitic acid; phenolic compounds; solvents; squalene; superoxide anion; therapeutics; urinary tract diseases; virulent strains
Abstract:
... Dregea volubilis is an important folk medicinal plant used as an ingredient in Ayurvedic formulations to treat asthma, piles, urinary tract infections, tumours, leucoderma, piles, inflammations, rheumatic pain, cough, severe cold and fever.The phytochemicals, percentage of extract yield, total phenolics and flavonoids, in vitro antioxidant, antidiabetic and antibacterial activities of six solvent ...
DOI:
10.1016/j.sajb.2020.12.013

21. Free radical scavenging potential and antibacterial activity of Cola nitida and Garcinia kola extracts against bacterial strains isolated from patients with urinary tract infections

Author:
I.V. Anyiam; P.P.E. Mounmbegna
Source:
Ruhuna journal of science 2020 v.11 no.2 pp. 98-117
ISSN:
2536-8400
Subject:
Cola nitida; Escherichia coli; Garcinia kola; Klebsiella pneumoniae; antibacterial properties; ethanol; flavonoids; free radicals; hydroxyl radicals; methanol; minimum inhibitory concentration; saponins; superoxide anion; urinary tract; Western Africa
Abstract:
... Cola nitida and Garcinia kola are found and widely consumed in West Africa. The seeds of these plants have various traditional uses and are reported to exhibit several bioactivities. Their phytochemical, antioxidant and antibacterial properties of methanol, ethanol and aqueous extracts were investigated in the present study. Phytochemical screening and quantification of total phenolic contents ana ...
DOI:
10.4038/rjs.v11i2.90

22. In vitro studies on antioxidant and cyto-protective activities of polyphenol-rich fraction isolated from Mangifera indica leaf

Author:
Kannan Nivedha; Sivaperumal Sivasakthi; Anand Prakash; Nagarajan Devipriya; Vellingiri Vadivel
Source:
South African journal of botany 2020 v.130 pp. 396-406
ISSN:
0254-6299
Subject:
2,2-diphenyl-1-picrylhydrazyl; Mangifera indica; antioxidant activity; chloroform; cytotoxicity; ethyl acetate; gallic acid; hexane; hydrogen peroxide; hydroxyl radicals; in vitro studies; inhibitory concentration 50; irradiation; leaf extracts; leaf mass; leaves; liquid chromatography; mangoes; methanol; models; mononuclear leukocytes; oxidative stress; radioprotective effect; salicylic acid; screening; solvents; superoxide anion; tandem mass spectrometry
Abstract:
... Present work was carried out with the objectives to isolate polyphenol-rich fraction from Mangifera indica leaves and its analysis in LC–MS/MS and also to investigate the antioxidant potential and cyto-protective activity of the active fraction against UV radiation-induced oxidative stress in PBMC model. M. indica leaf extracts were prepared using solvents of different polarity (hexane, chloroform ...
DOI:
10.1016/j.sajb.2020.01.019

23. Isaria tenuipes Peck, an entomopathogenic fungus from Darjeeling Himalaya: Evaluation of in-vitro antiproliferative and antioxidant potential of its mycelium extract

Author:
Dhani Raj Chhetri; Abhijit Chhetri; Nerina Shahi; Snigdha Tiwari; Shibendra Kumar Lal Karna; Dorjay Lama; Yuba Raj Pokharel
Source:
BMC complementary medicine and therapies 2020 v.20 no.1 pp. 185
ISSN:
2662-7671
Subject:
Isaria; alternative medicine; antioxidant activity; apoptosis; cations; cytotoxicity; entomopathogenic fungi; flow cytometry; gallic acid; hydroxyl radicals; methanol; mycelium; neoplasm cells; propidium; quercetin; Himalayan region
Abstract:
... BACKGROUND: Isaria tenuipes is one of the potent species in the members of the genus Isaria, which is well reported to possess multiple bioactive substances of therapeutic importance. Therefore, an in vitro experimental study was carried to evaluate the bioactivities of the crude methanolic extract from the mycelium of this fungus. METHODS: The fungus was authenticated through morphological charac ...
DOI:
10.1186/s12906-020-02973-w

24. Morinda citrifolia L. leaves extracts obtained by traditional and eco-friendly extraction solvents: Relation between phenolic compositions and biological properties by multivariate analysis

Author:
Huilan Zhu; Jiachao Zhang; Congfa Li; Sixin Liu; Lu Wang
Source:
Industrial crops and products 2020 v.153 pp. 112586
ISSN:
0926-6690
Subject:
2,2-diphenyl-1-picrylhydrazyl; Morinda citrifolia; acetone; alpha-glucosidase; antimicrobial properties; antioxidant activity; enzyme inhibition; ethanol; ethyl acetate; ferulic acid; food industry; gallic acid; hydroxyl radicals; leaf extracts; medicinal properties; methanol; multivariate analysis; pharmaceutical industry; rutin; solvents
Abstract:
... Morinda citrifolia L. leaves (MCLs) have attracted considerable interest in the agricultural, pharmaceutical, and food industries owing to its medicinal properties. This present work aims to investigate the influences of extraction solvents such as water, organic solvents (ethanol, methanol, acetone, and ethyl acetate) and eco-friendly deep eutectic solvents (DESs) on total phenolic content (TPC), ...
DOI:
10.1016/j.indcrop.2020.112586

25. Phytochemical and Pharmacological Evaluation of Methanolic Extract of Knoxia sumatrensis Leaves

Author:
Settu Loganathan; Kuppusamy Selvam; Vairakkannu Sivasakthi; Palanisamy Prakash; Myilswamy Yamuna; Kandhasamy Lalitha; Muthugounder Subaramanian Shivakumar; Sengottayan Senthil Nathan
Source:
Journal of herbs, spices & medicinal plants 2021 v.27 no.2 pp. 200-217
ISSN:
1540-3580
Subject:
Culex quinquefasciatus; Knoxia; breast neoplasms; flavonoids; human cell lines; hydroxyl radicals; larvicides; leaves; lung neoplasms; methanol; palmitic acid; secondary metabolites; toxicity
Abstract:
... Knoxia sumatrensis leaf extracts in methanol were analyzed for the phytochemical compositions, antioxidant properties (DPPH, ABTS, and hydroxyl radical assay), anti-proliferative activity (lung cancer A549 and breast cancer MCF-7 cell lines), and mosquito larvicidal properties. The GC-MS analysis showed the presence of eight bioactive compounds of which the hexadecanoic Acid, 2-Propyl-, methyl Est ...
DOI:
10.1080/10496475.2021.1891179

26. Simultaneous optimization of ultrasound-assisted extraction of antioxidants and tyrosinase inhibitory activities of Semen Oroxyli flavonoids using response surface methodology

Author:
Xing-shuo Yin; Xue-qin Zhang; De-qiang Li
Source:
Journal of food measurement & characterization 2020 v.14 no.2 pp. 694-707
ISSN:
2193-4126
Subject:
2,2-diphenyl-1-picrylhydrazyl; antioxidant activity; chrysin; enzyme inhibition; enzymes; experimental design; hydroxyl radicals; liquids; methanol; response surface methodology; solvents; superoxide anion; tandem mass spectrometry; ultrasonic treatment
Abstract:
... In this study, the ultrasound-assisted extraction (UAE) of flavonoids with maximal antioxidant and tyrosinase inhibitory activities and identification of the principal individual flavonoids compounds of Semen Oroxyli by UHPLC-DAD-QTOF-MS/MS was proposed. The method was optimized by a three-factor-three-level Box–Behnken design (BBD) and Derringer’s desirability function using methanol concentratio ...
DOI:
10.1007/s11694-019-00316-z

27. Solar Photocatalytic Oxidation of Methane to Methanol with Water over RuOₓ/ZnO/CeO₂ Nanorods

Author:
Dan Yu; Yanyan Jia; Zhou Yang; Hongwen Zhang; Jiwu Zhao; Yibo Zhao; Bo Weng; Wenxin Dai; Zhaohui Li; Pengzhao Wang; Julian A. Steele; Maarten B. J. Roeffaers; Sheng Dai; Haowei Huang; Jinlin Long
Source:
ACS sustainable chemistry & engineering 2021 v.10 no.1 pp. 16-22
ISSN:
2168-0485
Subject:
chemical industry; green chemistry; hydroxyl radicals; irradiation; lighting; methane; methanol; nanorods; oxidation; photocatalysis; photocatalysts; value added
Abstract:
... Due to the high stability and chemical inertia of methane, CH₄, its selective conversion into value-added organic chemicals under mild conditions has been widely regarded as an important reaction for the chemical industry. Here, we develop a RuOₓ decorated ZnO/CeO₂ photocatalyst for the highly efficient and selective transformation of CH₄ into CH₃OH under simulated solar light irradiation. The CH₃ ...
DOI:
10.1021/acssuschemeng.1c07162

28. Cu(II)-enhanced degradation of acid orange 7 by Fe(II)-activated persulfate with hydroxylamine over a wide pH range

Author:
Xin Liu; Baoling Yuan; Jing Zou; Lingbin Wu; Lin Dai; Hongfang Ma; Kai Li; Jun Ma
Source:
Chemosphere 2019 pp. -
ISSN:
0045-6535
Subject:
acid orange 7; copper; diclofenac; ferric hydroxide; hydroxyl radicals; hydroxylamine; iron; methanol; pH; phenol; sodium bromide; sulfates
Abstract:
... The activation of persulfate by Fe(II) coupled with hydroxylamine (the HA/Fe(II)/PS system) was highly effective for the degradation of refractory organic contaminants under acidic pH conditions. However, owing to the precipitation of ferric hydroxide and/or the slow reduction from Fe(III) to Fe(II), the HA/Fe(II)/PS system was invalid under neutral and alkaline pH conditions. In this study, it wa ...
DOI:
10.1016/j.chemosphere.2019.124533

29. Cubic platinum nanoparticles capped with Cs2[closo-B12H12] as an effective oxidation catalyst for converting methane to ethanol

Author:
Zhengxi Wang; Yi Liu; Haibo Zhang; Xiaohai Zhou
Source:
Journal of colloid and interface science 2020 v.566 pp. 135-142
ISSN:
0021-9797
Subject:
carbon; catalysts; chemical bonding; electron paramagnetic resonance spectroscopy; energy; ethanol; free radicals; hydrogen peroxide; hydroxyl radicals; methane; methanol; nanoparticles; oxidation; oxygen; platinum
Abstract:
... Direct conversion of methane to alcohol remains a key challenge. Here, we report a novel aqueous catalyst, cubic platinum (Pt) nanoparticles capped with Cs₂[closo-B₁₂H₁₂], capable of direct oxidation of methane to ethanol and methanol with H₂O₂ and O₂ under facile conditions. The selective conversion to ethanol exceeded 97% with a yield reaching 148.41 mol·kgcₐₜ⁻¹·h⁻¹ at 50 °C. Experiments with 5, ...
DOI:
10.1016/j.jcis.2020.01.047

30. Degradation of liquid phase N,N-dimethylformamide by dielectric barrier discharge plasma: Mechanism and degradation pathways

Author:
Wenjiao Sang; Jiaqi Cui; Longjie Mei; Qian Zhang; Yunyang Li; Danyi Li; Wanjun Zhang; Zhixuan Li
Source:
Chemosphere 2019 v.236 pp. 124401
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; ammonium nitrogen; aqueous solutions; carbon dioxide; dimethylformamide; energy efficiency; formaldehyde; formic acid; high performance liquid chromatography; hydroxyl radicals; liquids; methanol; mineralization; pH
Abstract:
... The degradation of liquid phase N,N-dimethylformamide (DMF) using the dielectric barrier discharge (DBD) plasma was studied in the present study. The results showed that 1000 mg L⁻¹ DMF could be degraded by DBD plasma under different input power, treatment time and initial pH values of aqueous solution. After 40 min with DBD plasma discharge, 52.2% degradation efficiency was achieved at DMF concen ...
DOI:
10.1016/j.chemosphere.2019.124401

31. Efficient photocatalytic CO2 reduction by P–O linked g-C3N4/TiO2-nanotubes Z-scheme composites

Author:
Jing Wu; Yujie Feng; Da Li; Xiaoyu Han; Jia Liu
Source:
Energy 2019 v.178 pp. 168-175
ISSN:
0360-5442
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; carbon dioxide; carbon nitride; electric current; energy; formic acid; free radicals; hydroxyl radicals; light; methanol; photocatalysis; photocatalysts; sublimation; synergism
Abstract:
... P–O linked g-C3N4/TiO2-nanotubes (TNTs) Z-scheme composites were fabricated using a solid sublimation and conversion means, followed by an impregnation method for the first time, and they were characterized by scanning electrons microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and UV–visible diffuse reflection spectroscopy. The photocatalytic activity was investigated by CO2 reduct ...
DOI:
10.1016/j.energy.2019.04.168

32. GC/MS profile, DNA protectant and hepatoprotective effects of Praecitrullus fistulosus fruit methanol extract.

Author:
C.S. Madhu; K.S. Balaji; A.C. Sharada
Source:
Biocatalysis and agricultural biotechnology 2019 v.21 pp. 101272
ISSN:
1878-8181
Subject:
DNA; animal models; antioxidant activity; antioxidant enzymes; blood serum; dietary supplements; edible fruits; enzyme activity; erythrocytes; gas chromatography-mass spectrometry; hepatoprotective effect; histopathology; hydrogen peroxide; hydroxyl radicals; liver; methanol; mice; necrosis; pharmaceutical industry; product development
Abstract:
... The aim of the present investigation is to evaluate the antioxidant, DNA protectant and hepatoprotective effects of methanol extract of Praecitrullus fistulosus fruits. The antioxidant and DNA protectant activity using in vitro model and hepatoprotective effect using in vivo model was assessed. Antioxidant potential of MeOH was assessed by ABTS, hydroxyl radical, FRAP and H₂O₂ scavenging activity. ...
DOI:
10.1016/j.bcab.2019.101272

33. Hydrogen Bonding in the Liquid State of Linear Alcohols: Molecular Dynamics and Thermodynamics

Author:
Aman Jindal; Sukumaran Vasudevan
Source:
Journal of physical chemistry 2020 v.124 no.17 pp. 3548-3555
ISSN:
1520-5207
Subject:
Gibbs free energy; ethanol; hydrogen bonding; hydroxyl radicals; liquids; methanol; moieties; molecular dynamics; pentanols; probability distribution; simulation models
Abstract:
... Linear monohydroxy alcohols are strongly hydrogen-bonded liquids that are considered to be homologues of water. Here, we report ab initio molecular dynamics simulations of the liquid alcohols, methanol to pentanol, and from the combined radial–angular probability distribution of the intermolecular O···O distances and HO···O angles determine the geometrical parameters that define the hydrogen bonds ...
DOI:
10.1021/acs.jpcb.0c01199

34. Impact of Quality Control Standardization Parameters and Antioxidant Potential of the Aerial Parts of Potentilla fulgens Wall.: A Comprehensive Monographic Study

Author:
Damiki Laloo; Rajdeep Tahbildar; Krihungi Smith; Ashraf Uddin Ahmed; Junmoni Nath; Dibyendu Shil; Gouranga Das; Amyrallis Langbang; Satyendra K. Prasad; Narendra K. Singh
Source:
Journal of Biologically Active Products from Nature 2020 v.10 no.4 pp. 338-356
ISSN:
2231-1874
Subject:
Escherichia coli; Potentilla siemersiana; antimicrobial properties; antioxidant activity; ascorbic acid; diabetes; diarrhea; hydrogen peroxide; hydroxyl radicals; medicinal plants; methanol; phytochemicals; polyphenols; quality control; reference standards; saponins
Abstract:
... Potentilla fulgens Wall. (Rosaceae) is a medicinal herb that is traditionally used to treat diabetes, ulcers, diarrhea, and cancer. Since the genus Potentilla bears numerous closely related species; hence, standardization of the specific species is of great importance. The present study aims to evaluate the aerial parts of P. fulgens (APPF) based on pharmacognostic, phytochemical, an in vitro stud ...
DOI:
10.1080/22311866.2020.1806731

35. Investigation of Matrix Effects in Laboratory Studies of Catalytic Ozonation Processes

Author:
Wenwen Yang; Tingting Wu
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.8 pp. 3468-3477
ISSN:
1520-5045
Subject:
adsorption; borates; catalysts; electron transfer; hydroxyl radicals; methanol; models; oxalates; oxidation; ozonation; ozone; pH; phosphates; process design; silica
Abstract:
... A systematic study investigating the effects of water matrices on heterogeneous catalytic ozonation processes was conducted in a semibatch reactor at initial pH 7.00 ± 0.20. Specifically, three matrices commonly used in laboratory studies were tested: deionized (DI) water, phosphate buffered solution, and tetra-borate buffered solution. Three metal oxide catalysts on SiO₂ support, CuO/SiO₂, Fe₂O₃/ ...
DOI:
10.1021/acs.iecr.8b05465

36. Methanol and ethanol concentrations in a Greenland ice core

Author:
J. David Felix; J. Alan Roebuck; Ralph N. Mead; Joan D. Willey; G. Brooks Avery; Robert J. Kieber
Source:
Atmospheric environment 2019 v.217 pp. 116948
ISSN:
1352-2310
Subject:
aldehydes; anions; anthropogenic activities; atmospheric chemistry; cold zones; emissions; ethanol; hydroxyl radicals; ice; methanol; oxidation; protons; Greenland
Abstract:
... The first methanol and ethanol concentrations in a Greenland ice core are reported for 14 annual samples ranging from 1686 to 1947 AD. Concentrations ranged from 83 nM to 1666 nM and 16 nM–424 nM for methanol and ethanol, respectively. Low median methanol and ethanol concentrations from 1686 to 1745 result primarily from natural emissions during a cold climate period. These concentrations provide ...
DOI:
10.1016/j.atmosenv.2019.116948

37. Phenolic composition, antioxidant and antibacterial properties, and in vitro anti-HepG2 cell activities of wild apricot (Armeniaca Sibirica L. Lam) kernel skins

Author:
Fangling Qin; Lu Yao; Cairui Lu; Cong Li; Yanyan Zhou; Chencan Su; Bang Chen; Yehua Shen
Source:
Food and chemical toxicology 2019 v.129 pp. 354-364
ISSN:
0278-6915
Subject:
Acetobacter (subgen. Acetobacter) aceti; Bacillus cereus; Bacillus subtilis; Escherichia coli; Prunus sibirica; Staphylococcus aureus; advanced oxidation protein products; anthocyanins; antibacterial properties; antineoplastic activity; apigenin; apoptosis; apricots; cell viability; cyanidin; free radicals; glutathione; human cell lines; hydrogen peroxide; hydroxyl radicals; industrial applications; iron; liquid chromatography; malondialdehyde; mass spectrometry; methanol; oxidants; polyphenols; salicylic acid; seeds; superoxide anion; toxicology
Abstract:
... The polyphenols profiles of the methanol extracts of bitter apricot [Armeniaca Sibirica (L.)] kernel skins (AKS) were analysed by liquid chromatography-electrospray ionization mass spectrometry. The antioxidan, anticancer effect on HepG2 cell and antibacterial properties of the AKS polyphenol extracts were further characterized in vitro. Polyphenol compounds (35), including nine phenolic acids, th ...
DOI:
10.1016/j.fct.2019.05.007

38. Promotional effect of short‐chain saturated alcohols on Fe3O4‐catalyzed decomposition of H2O2 and its application in selective oxidation of benzyl alcohol

Author:
Jiawei Zhang; Shiwei Xiao; Rong Chen; Fengxi Chen
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.5 pp. 1613-1621
ISSN:
0268-2575
Subject:
Lewis bases; benzyl alcohol; biotechnology; catalysts; catalytic activity; ethanol; glycerol; hydrogen peroxide; hydroxyl radicals; iron; magnetism; magnetite; methanol; microparticles; oxidation; pollutants; remediation
Abstract:
... BACKGROUND: Hydrogen peroxide (H₂O₂) has been used widely in diverse areas of biotechnology, environmental remediation and organic synthesis wherein its catalytic activation to generate reactive oxygen species (e.g. hydroxyl radicals) is of vital importance. Magnetite (Fe₃O₄) microspheres are attractive heterogeneous peroxidase‐like catalysts due to many technological advantages (e.g. biocompatibl ...
DOI:
10.1002/jctb.5929

39. Quantitative assessment of the iron-catalyzed degradation of a polyamide nanofiltration membrane by hydrogen peroxide

Author:
Ling Yu; Ran Ling; J. Paul Chen; Martin Reinhard
Source:
Journal of membrane science 2019 v.588 pp. 117154
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; antifouling agents; artificial membranes; chlorine; disinfectants; disinfection; ferric oxide; goethite; hydrogen peroxide; hydrolysis; hydroxyl radicals; iron; methanol; nanofiltration; oxidation; peracetic acid; polyamides; reverse osmosis; sodium chloride; ultrafiltration; water treatment
Abstract:
... Peracetic acid (PAA)/hydrogen peroxide (H2O2) is of interest as a substitute disinfectant and antifouling agent for chlorine in water treatment systems using reverse osmosis (RO) and nanofiltration (NF). To maximize disinfection while minimizing damage to membranes, it is necessary to understand the factors that govern the oxidation of the polyamide (PA) separation layer by peroxides. This study e ...
DOI:
10.1016/j.memsci.2019.05.078

40. Simultaneous degradation of the anticancer drugs 5-fluorouracil and cyclophosphamide using a heterogeneous photo-Fenton process based on copper-containing magnetites (Fe3-xCuxO4)

Author:
Elissandro Soares Emídio; Peter Hammer; Raquel F. Pupo Nogueira
Source:
Chemosphere 2020 v.241 pp. 124990
ISSN:
0045-6535
Subject:
X-radiation; X-ray diffraction; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; catalysts; catalytic activity; copper; cyclophosphamide; fluorescence; fluorouracil; free radical scavengers; hydrogen peroxide; hydroxyl radicals; ions; iron; leaching; magnetite; methanol; nanoparticles; oxidation; pH; scanning electron microscopy; surface area; umbelliferones
Abstract:
... The effect of substitution of iron by copper in the magnetite lattice was investigated in terms of the catalytic activity in the heterogeneous photo-Fenton process. The physicochemical properties of the Fe₃₋ₓCuₓO₄ nanoparticles were characterized by X-ray diffraction (XRD), X-ray fluorescence (WD-XRF), specific surface area measurements, field emission scanning electron microscopy (FEG-SEM), and X ...
DOI:
10.1016/j.chemosphere.2019.124990

41. UVC-assisted photocatalytic degradation of carbamazepine by Nd-doped Sb2O3/TiO2 photocatalyst

Author:
Zhao Wang; Varsha Srivastava; Shaobin Wang; Hongqi Sun; Senthil K. Thangaraj; Janne Jänis; Mika Sillanpää
Source:
Journal of colloid and interface science 2020 v.562 pp. 461-469
ISSN:
0021-9797
Subject:
X-ray diffraction; crystal structure; free radicals; hot water treatment; hydroxyl radicals; mass spectrometry; methanol; nanorods; neodymium; optical properties; photocatalysis; photocatalysts; reflectance spectroscopy; scanning electron microscopy; surface area; texture; titanium dioxide; transmission electron microscopy; ultraviolet radiation; wavelengths
Abstract:
... The photocatalytic degradation of carbamazepine (CBZ) in ultra-pure water was investigated by using neodymium (Nd)-doped antimony trioxide (Sb₂O₃)/titanium dioxide (TiO₂) photocatalyst under the UVC irradiations of 254 nm wavelength. The hydrothermal method was used for the fabrication catalyst samples with different ratios of Nd (0%–2%) dopant, and characterised by X-ray diffraction pattern (XRD) ...
DOI:
10.1016/j.jcis.2019.11.094

42. Unraveling the Overlooked Involvement of High-Valent Cobalt-Oxo Species Generated from the Cobalt(II)-Activated Peroxymonosulfate Process

Author:
Yang Zong; Xiaohong Guan; Jun Xu; Yong Feng; Yunfeng Mao; Longqian Xu; Huaqiang Chu; Deli Wu
Source:
Environmental science & technology 2020 v.54 no.24 pp. 16231-16239
ISSN:
1520-5851
Subject:
cobalt; density functional theory; dimethyl sulfoxide; hydroxyl radicals; isotope labeling; kinetics; methanol; nitrobenzenes; oxygen; pollutants; sulfamethoxazole; sulfates; sulfoxides; technology; thermodynamics
Abstract:
... Sulfate radical (SO₄•–) is widely recognized as the predominant species generated from the cobalt(II)-activated peroxymonosulfate (PMS) process. However, in this study, it was surprisingly found that methyl phenyl sulfoxide (PMSO) was readily oxidized to the corresponding sulfone (PMSO₂) with a transformation ratio of ∼100% under acidic conditions, which strongly implied the generation of high-val ...
DOI:
10.1021/acs.est.0c06808

43. Acceleration of acid red 1 dye decolorization efficiency by adding methanol with simultaneous hydrogen production

Author:
J.-T. Lee; E.-C. Su; M.-Y. Wey
Source:
International journal of environmental science and technology 2019 v.16 no.12 pp. 8355-8362
ISSN:
1735-1472
Subject:
decolorization; dyes; hydrogen production; hydroxyl radicals; methanol; photocatalysis; superoxide anion
Abstract:
... A promising and efficient pathway for simultaneous photocatalytic decolorization of acid red 1 (AR1) dye and hydrogen production was developed in this study. The results demonstrated that the AR1 decolorization efficiency was accelerated by adding only 15 v/v% methanol, which was attributable to the decreased charge recombination rate caused by methanol molecules. The decreased charge recombinatio ...
DOI:
10.1007/s13762-019-02416-1

44. Bee Pollen Extracts as Potential Antioxidants and Inhibitors of α-Amylase and α-Glucosidase Enzymes In Vitro Assessment

Author:
Oluremi M. Daudu
Source:
Journal of apicultural science 2019 v.63 no.2 pp. 315-325
ISSN:
2299-4831
Subject:
2,2-diphenyl-1-picrylhydrazyl; alpha-amylase; alpha-glucosidase; bee pollen; blood flow; blood glucose; cations; disaccharides; enzyme inhibition; enzyme inhibitors; ethanol; flavonoids; free radicals; gallic acid; glycemic effect; hydroxyl radicals; in vitro studies; inhibitory concentration 50; methanol; phenol; sulfonic acids
Abstract:
... The study was conducted to determine the antioxidant and anti-diabetic properties of bee pollen. The phenol content of extracts was 1.43, 2.04, 2.10 and 1.79 mg gallic acid g-1, respectively. Total flavonoid content was 0.78, 1.39, 0.86 and 0.79 mg gallic acid g-1 respectively. Bee pollen extracts have the potential to scavenge free radicals and lower blood glucose due to the presence of phenols a ...
DOI:
10.2478/jas-2019-0020

45. Catalytic effect of iron on the tolerance of thin-film composite polyamide reverse osmosis membranes to hydrogen peroxide

Author:
Ran Ling; Ling Yu; Thi Phuong Thuy Pham; Jiahui Shao; J. Paul Chen; Martin Reinhard
Source:
Journal of membrane science 2018 v.548 pp. 91-98
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; antifouling agents; artificial membranes; byproducts; chlorides; corrosion; disinfection; free radicals; hydrogen peroxide; hydroxyl radicals; iron; iron oxides; methanol; oxidation; phosphates; polyamides; reverse osmosis; scanning electron microscopy; toxicity
Abstract:
... Hydrogen peroxide (H₂O₂) is potentially an attractive alternative to chlorine-based (hypochlorous acid and monochloramine) antifouling agents in reverse osmosis (RO) because H₂O₂ does not form toxic disinfection byproducts and is tolerated by polyamide (PA) membranes up to high concentrations. However, aqueous H₂O₂ solutions are corrosive and iron corrosion products activate H₂O₂ to reactive oxyge ...
DOI:
10.1016/j.memsci.2017.11.009

46. Degradation of diethyl phthalate (DEP) by UV/persulfate: An experiment and simulation study of contributions by hydroxyl and sulfate radicals

Author:
Ziying Wang; Yisheng Shao; Naiyun Gao; Xian Lu; Na An
Source:
Chemosphere 2018 v.193 pp. 602-610
ISSN:
0045-6535
Subject:
antioxidant activity; bicarbonates; chlorides; free radicals; hydrogen; hydroxyl radicals; kinetics; methanol; organic matter; pH; phosphates; phthalates; sulfates
Abstract:
... Degradation of diethyl phthalate (DEP) by ultraviolet/persulfate (UV/PS) process at different reaction conditions was evaluated. DEP can be degraded effectively via this process. Both tert-butyl (TBA) and methanol (MeOH) inhibited the degradation of DEP with MeOH having a stronger impact than TBA, suggesting sulfate radical (▪) and hydroxyl radical (HO) both existed in the reaction systems studied ...
DOI:
10.1016/j.chemosphere.2017.11.075

47. Determination of the yield, saponin content and profile, antimicrobial and antioxidant activities of three Gypsophila species

Author:
Barbara Kołodziej; Łukasz Sęczyk; Danuta Sugier; Bogdan Kędzia; Mykhaylo Chernetskyy; Reneta Gevrenova; Max Henry
Source:
Industrial crops and products 2019 v.138 pp. 111422
ISSN:
0926-6690
Subject:
2,2-diphenyl-1-picrylhydrazyl; Gypsophila paniculata; antimicrobial properties; antioxidant activity; digestion; food additives; gastrointestinal system; guidelines; harvesting; hexane; hydroxyl radicals; hygiene; in vitro digestion; industry; iron; liquid chromatography; methanol; phytochemicals; polyphenols; raw materials; roots; saponins; spectrometers; triterpenoids; underground parts
Abstract:
... In this study, the yield of morphological parts, the saponin content and profile, and the antimicrobial and antioxidant activities of three Gypsophila species (G. paniculata, G. pacifica, and G. scorzonerifolia) were determined. Furthermore, an effort was made to develop guidelines on general principles of cultivation and recommendations with regard to raw material harvesting.Along with plant agin ...
DOI:
10.1016/j.indcrop.2019.05.071

48. Direct target and non-target analysis of urban aerosol sample extracts using atmospheric pressure photoionisation high-resolution mass spectrometry

Author:
Chiara Giorio; Claudio Bortolini; Ivan Kourtchev; Andrea Tapparo; Sara Bogialli; Markus Kalberer
Source:
Chemosphere 2019 v.224 pp. 786-795
ISSN:
0045-6535
Subject:
aerosols; atmospheric pressure; evaporation; hydroxyl radicals; ionization; mass spectrometry; methanol; nitrogen oxides; oxidation; particulates; pollutants; polycyclic aromatic hydrocarbons; public health; spectrometers; summer; temperature; toluene; winter; Italy
Abstract:
... Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous atmospheric pollutants of high concern for public health. In the atmosphere they undergo oxidation, mainly through reactions with ·OH and NOx to produce nitro- and oxygenated (oxy-) derivatives. In this study, we developed a new method for the detection of particle-bound PAHs, nitro-PAHs and oxy-PAHs using direct infusion into an atmospheric p ...
DOI:
10.1016/j.chemosphere.2019.02.151

49. Effect of crystalline structure on terbuthylazine degradation by H2O2-assisted TiO2 photocatalysis under visible irradiation

Author:
Jianjun Tang; Yiqing Chen; Zijun Dong
Source:
Journal of environmental sciences (China) 2019 v.79 pp. 153-160
ISSN:
1001-0742
Subject:
crystal structure; fluorescence emission spectroscopy; free radical scavengers; hydrogen peroxide; hydroxyl radicals; irradiation; methanol; photocatalysis; photocatalysts; synergism; terbuthylazine; titanium dioxide
Abstract:
... Various methods for shifting the optical response of TiO2 into the visible (Vis) range have been reported. Herein, we reported the application of a TiO2/H2O2/Vis process and the effects of TiO2 crystalline structure on the degradation of terbuthylazine. The results indicated that TiO2 crystalline structure and H2O2 addition had significant effects on terbuthylazine degradation: its degradation rat ...
DOI:
10.1016/j.jes.2018.11.020

50. Evaluation of antioxidant activities of various solvent extract from Sargassum serratifolium and its major antioxidant components

Author:
Sujin Lim; An-Hong Choi; Misung Kwon; Eun-Ji Joung; Taisun Shin; Sang-Gil Lee; Nam-Gil Kim; Hyeung-Rak Kim
Source:
Food chemistry 2019 v.278 pp. 178-184
ISSN:
0308-8146
Subject:
2,2-diphenyl-1-picrylhydrazyl; Sargassum serratifolium; antioxidant activity; ethanol; ethyl acetate; hexane; hydroxyl radicals; inhibitory concentration 50; methanol; solvents; superoxide anion
Abstract:
... Sargassum serratifolium has been known to contain a high level of meroterpenoids as antioxidant components. We investigated antioxidant activities and active components in various solvent extracts from S. serratifolium. Ethyl acetate, ethanol, and methanol extracts showed relatively strong DPPH, ABTs, and superoxide radical scavenging activities. Hexane and ethyl acetate extract showed the stronge ...
DOI:
10.1016/j.foodchem.2018.11.058