You searched for:
Publication year rev
7987-2013
Remove constraint Publication year rev: 7987-2013
Subject
antioxidants
Remove constraint Subject: antioxidants
Subject term
antioxidant activity
Remove constraint Subject term: antioxidant activity
Subject term
quercetin
Remove constraint Subject term: quercetin
PubAg
Main content area
Limit your search
Search
34 Search Results
1 - 34 of 34
Search Results
- Author:
- Li Xican; Gao Yaoxiang; Han Weijuan; Lin Jing; Hu Qiuping; Chen Dongfeng
- Source:
- Acta biologica Cracoviensia 2013 v.55 no.1 pp. 80-85
- ISSN:
- 1898-0295
- Subject:
- Hylocereus undatus; antioxidant activity; antioxidants; bioactive compounds; chelation; flowers; functional foods; hydrogen; kaempferol; phenolic compounds; quercetin; China
- Abstract:
- ... Hylocereus undatus flower is commonly used as food or for medicinal purposes in south China. To study its antioxidant activity and mechanism we used antioxidant and chemical assays to compare two commercial samples from different locations (Shenjing, Qixing). The difference in antioxidant levels corresponded with differences in chemical content (including total phenolics, total flavonoids, kaempfe ...
- DOI:
- 10.2478/abcsb-2013-00014
- https://doi.org/10.2478/abcsb-2013-00014
- Author:
- Yang Kuo Li-Ming; Zhang Li-Jie; Huang Hung-Tse; Lin Zhi-Hu; Liaw Chia-Ching; Cheng Hui-Ling; Lee Kuo-Hsiung; Morris-Natschke Susan L.; Kuo Yao-Haur; Ho Hsiu-O
- Source:
- Journal of natural products 2013 v.76 no.4 pp. 580-587
- ISSN:
- 1520-6025
- Subject:
- Eurya japonica; alpha-tocopherol; antioxidant activity; antioxidants; circular dichroism spectroscopy; glycosides; lignans; nuclear magnetic resonance spectroscopy; quercetin; stems
- Abstract:
- ... Four new 8,8′,7,2′-lignans, (+)-ovafolinin B-9′-O-β-d-glucopyranoside (1), (−)-ovafolinin B-9′-O-β-d-glucopyranoside (2), (+)-ovafolinin E-9′-O-β-d-glucopyranoside (3), and (−)-ovafolinin E-9′-O-β-d-glucopyranoside (4), two neolignans, eusiderin N (5) and (7S,8R)-3,5,5′-trimethoxy-4′,7-epoxy-8,3′-neolignan-9,9′-diol-4-O-β-d-xylopyranoside (6), and two new chromone glycosides, 5,7-dihydroxy-4H-chro ...
- DOI:
- 10.1021/np3007638
- https://doi.org/10.1021/np3007638
- Author:
- R.M. Maciel; M.M. Costa; D.B. Martins; R.T. França; R. Schmatz; D.L. Graça; M.M.M.F. Duarte; C.C. Danesi; C.M. Mazzanti; M.R.C. Schetinger; F.C. Paim; H.E. Palma; F.H. Abdala; N. Stefanello; C.K. Zimpel; D.V. Felin; S.T.A. Lopes
- Source:
- Research in veterinary science 2013 v.95 no.2 pp. 389-397
- ISSN:
- 0034-5288
- Subject:
- anti-inflammatory activity; anti-inflammatory agents; antioxidant activity; antioxidants; diabetes mellitus; ethanol; free radicals; hyperglycemia; oxidative stress; quercetin; rats; streptozotocin
- Abstract:
- ... The aim of this study was to investigate functional and morphological alterations caused by oxidative stress in streptozotocin (STZ)-induced diabetic rats and to evaluate the antioxidant effect of quercetin (QUE) in this disease. One hundred and thirty male Wistar rats, it were randomly distributed in 10 different experimental groups, with ten animals per group: Control Saline (CS), Control Ethano ...
- DOI:
- 10.1016/j.rvsc.2013.04.028
- PubMed:
- 23706762
- https://doi.org/10.1016/j.rvsc.2013.04.028
- Author:
- Rosario García-Mateos; Emmanuel Ibarra-Estrada; Raúl Nieto-Angel
- Source:
- Revista mexicana de biodiversidad 2013 v.84 no.4 pp. 1298-1304
- ISSN:
- 1870-3453
- Subject:
- 2,2-diphenyl-1-picrylhydrazyl; Crataegus; antioxidant activity; antioxidants; ascorbic acid; fruits; functional foods; genotype; germplasm; inhibitory concentration 50; litchis; peaches; phytopharmaceuticals; quercetin; strawberries; Mexico
- Abstract:
- ... The content of phytochemicals associated with the antioxidant activity of the fruits of species of hawthorn (Crataegus spp.; Rosacea) located in Mexico is unknown. The objective of the present study was to evaluate the content of phenolic compounds, flavonoids, vitamin C and the antioxidant activity in a selection of Mexican hawthorn species. A quantification was made of total phenols, flavonoids ...
- DOI:
- 10.7550/rmb.35675
- https://doi.org/10.7550/rmb.35675
- Author:
- Jiwon Choi; Hyun Ju Kang; Sung Zoo Kim; Tae Oh Kwon; Seung-Il Jeong; Seon Il Jang
- Source:
- Archives of pharmacal research 2013 v.36 no.7 pp. 912-917
- ISSN:
- 0253-6269
- Subject:
- Morus alba; active oxygen species; antioxidant activity; antioxidants; dose response; erythrocytes; glutathione; hemolysis; high performance liquid chromatography; humans; kaempferol; leaves; medicinal plants; methanol; mulberries; oxidation; protective effect; quercetin
- Abstract:
- ... We evaluated the antioxidant properties of mulberry leaves extract (MLE) and flavonoids isolated from MLE. MLE was prepared by extraction with methanol. Flavonoids were analyzed by high-performance liquid chromatography. Oxidative hemolysis of normal human red blood cells (RBCs) was induced by the aqueous peroxyl radical [2,2′-Azobis (2-amidinopropane) dihydrochloride, AAPH]. MLE contained three f ...
- DOI:
- 10.1007/s12272-013-0090-x
- https://doi.org/10.1007/s12272-013-0090-x
- Author:
- Yan-Ping Li; Yan-Hong Li; Jin-Dong Zhong; Rong-Tao Li
- Source:
- Journal of Asian natural products research 2013 v.15 no.8 pp. 875-879
- ISSN:
- 1477-2213
- Subject:
- Pieris japonica; antioxidant activity; antioxidants; flowers; glycosides; nuclear magnetic resonance spectroscopy; quercetin
- Abstract:
- ... A new phenolic glycoside, benzyl 2-hydroxy-4-O-β-d-glucopyranosyl-benzoate (1), along with nine known flavonoids, epicatechin-(2 → O → 7,4 → 8)-ent-epicatechin (2), bis-8,8′-catechinylmethane (3), quercetin (4), quercetin-3-O-α-l-arabinfuranoside (5), quercetin-3-O-α-l-rhamnopyranoside (6), astilbin (7), engeletin (8), (2S,3R)-ent-catechin (9), and 2′,4-dihydroxy-4′-methoxy-6′-O-β-d-glucopyranosyl ...
- DOI:
- 10.1080/10286020.2013.803475
- https://doi.org/10.1080/10286020.2013.803475
- Author:
- I. Šliumpaitė; P.R. Venskutonis; M. Murkovic; A. Pukalskas
- Source:
- Journal of functional foods 2013 v.5 no.4 pp. 1927-1937
- ISSN:
- 1756-4646
- Subject:
- Hyssopus officinalis; acetone; antioxidant activity; antioxidants; apigenin; caffeic acid; glycosides; high performance liquid chromatography; luteolin; methanol; polyphenols; quercetin; verbascoside
- Abstract:
- ... The antioxidant potential of Gratiola officinalis was evaluated by the off-line and on-line HPLC/UV/DPPH radical scavenging assays, phytochemical composition was analyzed by LC/MS. On-line method was validated by using reference antioxidants and linear dependence was found between their concentration and radical scavenging peak area. Radical scavenging capacity (RSC) of methanol and acetone extrac ...
- DOI:
- 10.1016/j.jff.2013.09.014
- https://doi.org/10.1016/j.jff.2013.09.014
- Author:
- M. Nogala-Kałucka; K. Dwiecki; A. Siger; P. Górnaś; K. Polewski; S. Ciosek
- Source:
- Acta alimentaria 2013 v.42 no.3 pp. 360-370
- ISSN:
- 0139-3006
- Subject:
- antioxidant activity; antioxidants; emulsions; fluorescence; glycosides; linoleic acid; oil-water interface; oxidative stress; peroxidation; quercetin; rutin; synergism; tocotrienols
- Abstract:
- ... The aim of the study was to reveal antioxidant synergism or antagonism between quercetin, rutin and selected tocotrienols in linoleic acid emulsion. The oxidative stress was generated by 2,2′-azobis(2-amidinopropane) dihydrochloride (AAPH) or CuSO4; the increase of the concentration of peroxidation products was monitored using fluorescence probe 2,7-dichlorofluorescein (DCF). The antiox ...
- DOI:
- 10.1556/AAlim.2012.0009
- https://doi.org/10.1556/AAlim.2012.0009
- Author:
- M. Nogala-Kałucka; K. Dwiecki; A. Siger; P. Górnaś; K. Polewski; S. Ciosek
- Source:
- Acta alimentaria 2013 v.42 no.3 pp. 360-370
- ISSN:
- 1588-2535
- Subject:
- antioxidant activity; antioxidants; copper sulfate; emulsions; fluorescent dyes; glycosides; linoleic acid; models; oil-water interface; oxidative stress; peroxidation; quercetin; rutin; synergism; tocotrienols
- Abstract:
- ... The aim of the study was to reveal antioxidant synergism or antagonism between quercetin, rutin and selected tocotrienols in linoleic acid emulsion. The oxidative stress was generated by 2,2′-azobis(2-amidinopropane) dihydrochloride (AAPH) or CuSO₄; the increase of the concentration of peroxidation products was monitored using fluorescence probe 2,7-dichlorofluorescein (DCF). The antioxidant activ ...
- DOI:
- 10.1556/aalim.2012.0009
- https://doi.org/10.1556/aalim.2012.0009
- Author:
- Hector H.F. Koolen; Felipe M.A. da Silva; Fábio C. Gozzo; Antonia Q.L. de Souza; Afonso D.L. de Souza
- Source:
- Food research international 2013 v.51 no.2 pp. 467-473
- ISSN:
- 0963-9969
- Subject:
- Mauritia; Pseudomonas aeruginosa; antimicrobial properties; antioxidant activity; antioxidants; bacteria; caffeic acid; chlorogenic acid; cosmetics; fruit extracts; ionization; kaempferol; leaf extracts; medicine; minimum inhibitory concentration; myricetin; pathogens; quercetin; rutin; tandem mass spectrometry; ultra-performance liquid chromatography; Amazonia
- Abstract:
- ... Mauritia flexuosa L. f. is a native palm tree from the South American Amazon rainforest commercialized in food, cosmetics and medicine. This paper reported the antioxidant, antimicrobial activities and characterization of phenolics from buriti leafs, trunk and fruit extracts. The total phenolics of the buriti extracts ranged from 378.07±3.12 to 86.89±3.15mg GAEq/100g and flavonoid content ranged f ...
- DOI:
- 10.1016/j.foodres.2013.01.039
- https://doi.org/10.1016/j.foodres.2013.01.039
- Author:
- P.R. Hussain; S. Chatterjee; P.S. Variyar; A. Sharma; M.A. Dar; A.M. Wani
- Source:
- Journal of food composition and analysis 2013 v.30 no.2 pp. 59-66
- ISSN:
- 0889-1575
- Subject:
- Prunus armeniaca; antioxidant activity; antioxidants; apigenin; apricots; beta-carotene; bleaching; catechin; coumaric acids; ellagic acid; high performance liquid chromatography; irradiation; quarantine; quercetin; solar drying
- Abstract:
- ... The phenolics from both control and irradiated (3.0kGy) dried apricots of Halman variety were identified and quantified by HPLC method using external standards. HPLC analysis revealed the presence of seventeen phenolic acids and eight flavonoids in dried apricots. Among the phenolic acids, ten were hydroxybenzoic acid derivatives (HBA), six hydroxycinnamic acid derivatives (HCA) and the one was pr ...
- DOI:
- 10.1016/j.jfca.2013.02.001
- https://doi.org/10.1016/j.jfca.2013.02.001
- Author:
- Jin Yi Wong; Patricia Matanjun; Yasmin Beng Houi Ooi; Kah Fei Chia
- Source:
- International journal of food sciences and nutrition 2013 v.64 no.5 pp. 621-631
- ISSN:
- 1465-3478
- Subject:
- Aniseia martinicensis; antioxidant activity; antioxidants; apigenin; ascorbic acid; catechin; coumaric acids; diodes; glycosides; high performance liquid chromatography; hydrolysis; hydroxybenzoic acids; kaempferol; leaves; lutein; luteolin; nutrition; quercetin
- Abstract:
- ... This study was carried out to characterize phenolic compounds, carotenoids, vitamins and the antioxidant activity of selected wild edible plants. Plant extracts were purified, and phenolic compounds comprising 11 phenolic acids (hydroxybenzoic acid and hydrocinnamic acid) and 33 flavonoids (including catechin, glycosides and aglycones) were analysed using High Performance Liquid Chromatography - D ...
- DOI:
- 10.3109/09637486.2013.763910
- https://doi.org/10.3109/09637486.2013.763910
- Author:
- Fouad Menaceur; Ahmed Benchabane; Mohamed Hazzit; Aoumeur Baaliouamer
- Source:
- Journal of Biologically Active Products from Nature 2013 v.3 no.1 pp. 87-96
- ISSN:
- 2231-1874
- Subject:
- 2,2-diphenyl-1-picrylhydrazyl; Juniperus phoenicea; alpha-pinene; antioxidant activity; antioxidants; butylated hydroxytoluene; chemical composition; essential oils; ethanol; gallic acid; gas chromatography-mass spectrometry; hydrodistillation; leaves; microwave treatment; quercetin; small fruits; solvents
- Abstract:
- ... Essential oils of Algerian Juniperus phoenicea L. obtained from leaves and berries by hydrodistillation (HD) and from berries by Solvent Free Microwave Assisted Extraction (SFMAE) were investigated using both capillary GC and GC-MS techniques. The monoterpene hydrocarbons constituted the most prominent group of constituents (43.2-86.5 %) in the three essential oils with α-pinene (34.4-80.8 %) as t ...
- DOI:
- 10.1080/22311866.2013.782754
- https://doi.org/10.1080/22311866.2013.782754
- Author:
- Carla T. M. Sayago; Vanessa B. Camargo; F. Barbosa; Cláudia Gularte; Geovana Pereira; Silvia Miotto; V. Cechinel Filho; R. Luiz Puntel; V. Folmer; A. Mendez
- Source:
- Acta biologica Hungarica 2013 v.64 no.1 pp. 21-33
- ISSN:
- 0236-5383
- Subject:
- Bauhinia forficata; Bauhinia variegata; antioxidant activity; antioxidants; chemical composition; ecosystems; high performance liquid chromatography; kaempferol; leaf extracts; leaves; phenolic compounds; quercetin; thiobarbituric acid-reactive substances; Brazil
- Abstract:
- ... Bauhinia species are known to have hypoglycemiant and antioxidant activities. Here, hydro-ethanolic leaf extracts from Bauhinia forficata subsp. pruinosa and Bauhinia variegata, collected in a Pampa biome region of Brazil, were investigated to characterize their chromatographic profile, flavonoid content and in vitro antioxidant activity (TBARS and DPH assays). T ...
- DOI:
- 10.1556/ABiol.64.2013.1.3
- https://doi.org/10.1556/ABiol.64.2013.1.3
- Author:
- Li Chunyang; Feng Jin; Huang Wu-Yang; An Xiao-Ting
- Source:
- Journal of agricultural and food chemistry 2013 v.61 no.3 pp. 523-531
- ISSN:
- 1520-5118
- Subject:
- Vaccinium virgatum; acids; anthocyanins; antioxidant activity; antioxidants; blueberries; fruits; functional foods; human health; ingredients; leaves; polyphenols; pomace; quercetin; rutin
- Abstract:
- ... The total phenolic content (TFC), total flavonoid content (TFC), antioxidant activity, and polyphenol composition of extracts of rabbiteye blueberry fruit polyphenols (BBFPs), rabbiteye blueberry pomace polyphenols (BBPPs), and rabbiteye blueberry leaves polyphenols (BBLPs) were investigated. The highest TPC and TFC were found in the extract of BBLPs, followed by the extracts of BBPPs and BBFPs. T ...
- DOI:
- 10.1021/jf3046158
- PubMed:
- 23268789
- https://doi.org/10.1021/jf3046158
- Author:
- Ghorbani, E.; Bakhshi, D.; Ghasemnezhad, M.; Arakawa, O.; Hajnajari, H.; Papachatzis, A.
- Source:
- Acta horticulturae 2013 no.981 pp. 705-711
- ISSN:
- 0567-7572
- Subject:
- anthocyanins; antioxidant activity; antioxidants; apples; catechin; chlorogenic acid; cultivars; cyanidin; high performance liquid chromatography; phenolic compounds; phloridzin; quercetin; regression analysis; Iran
- Abstract:
- ... In this study, total phenolics and antioxidant activity of flesh and peel, chlorogenic acid content and some flavonoids in the peel of eight Iranian and imported apple cultivars, growing in Karaj, Iran, were investigated. The total phenolic content was determined by the Folin-Ciocalteu method, antioxidant activity was measured by DPPH free radical method, chlorogenic acid and some flavonoids were ...
- Author:
- P. Nisha; S. Mini
- Source:
- Journal of functional foods 2013 v.5 no.4 pp. 1838-1847
- ISSN:
- 1756-4646
- Subject:
- Musa paradisiaca; animal disease models; anti-inflammatory activity; antioxidant activity; antioxidants; blood glucose; body weight; diabetic complications; dietary supplements; electrospray ionization mass spectrometry; enzymes; epicatechin; ethyl acetate; gallic acid; gene expression regulation; genes; high performance liquid chromatography; histopathology; hyperglycemia; inflammation; interleukin-6; lipid peroxidation; liver; messenger RNA; monocytes; oxidative stress; quercetin; rats; streptozotocin; transcription factor NF-kappa B; tumor necrosis factor-alpha; vegetables
- Abstract:
- ... Musa paradisiaca inflorescence is a commonly used vegetable. The purpose of this study was to evaluate the antioxidant; hypoglycaemic and anti-inflammatory activities of flavanoid rich fraction of M. paradisiaca inflorescence (MPIF) in streptozotocin (STZ) induced diabetes mellitus. Diabetic rats were treated with MPIF (200mg/kg body weight/day) for 60days. Diabetic rats showed significant (p<0.05 ...
- DOI:
- 10.1016/j.jff.2013.09.003
- https://doi.org/10.1016/j.jff.2013.09.003
- Author:
- Charanjit Kaur; Suresh Walia; Shweta Nagal; Shweta Walia; Jashbir Singh; Braj Bhushan Singh; Supradip Saha; Balraj Singh; Pritam Kalia; Seema Jaggi; Sarika
- Source:
- Lebensmittel-Wissenschaft + Technologie 2013 v.50 no.1 pp. 139-145
- ISSN:
- 0023-6438
- Subject:
- Solanum lycopersicum; Solanum pimpinellifolium; antioxidant activity; antioxidants; ascorbic acid; cultivars; genes; introduced species; lycopene; quercetin; tomatoes; India
- Abstract:
- ... Ten commercial and three exotic/wild cultivars (cvs) grown under Indian conditions were analyzed for variations in lycopene, β-carotene, total phenolics, quercetin, ascorbic acid and antioxidant activity (AOX). AOX was measured using three in vitro assays namely ferric reducing antioxidant power (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH) and Trolox equivalent antioxidant capacity (TEAC) assays. ...
- DOI:
- 10.1016/j.lwt.2012.06.013
- https://doi.org/10.1016/j.lwt.2012.06.013
- Author:
- Nuno Rainha; Kamila Koci; Ana Varela Coelho; Elisabete Lima; José Baptista; Manuel Fernandes-Ferreira
- Source:
- Phytochemistry 2013 v.86 pp. 83-91
- ISSN:
- 0031-9422
- Subject:
- Hypericum; antioxidant activity; antioxidants; apigenin; catechin; chlorogenic acid; epicatechin; isoquercitrin; luteolin; mass spectrometry; phenolic compounds; quercetin; quercitrin; quinic acid; shoots; water quality
- Abstract:
- ... LC–UV and LC–MS analysis were used to study the phenolic composition of water extracts of Hypericum undulatum (HU) shoot cultures and wild-growing (WG) plants. Total phenolic content (TPC), determined using the Folin–Ciocalteu assay, and the antioxidant activity measured by two complementary methods were also performed for each sample. Mass spectrometry revealed several phenolics acids with quinic ...
- DOI:
- 10.1016/j.phytochem.2012.10.006
- PubMed:
- 23141168
- https://doi.org/10.1016/j.phytochem.2012.10.006
- Author:
- Xinchen Zhang; Feng Chen; Mingfu Wang
- Source:
- Food chemistry 2013 v.141 no.4 pp. 3451-3458
- ISSN:
- 0308-8146
- Subject:
- antioxidant activity; antioxidants; chemical reactions; chlorogenic acid; color; epicatechin; fructose; functional foods; hydroxymethylfurfural; naringenin; pH; pollutants; polyphenols; quercetin; rosmarinic acid
- Abstract:
- ... This study investigated the impacts of six dietary polyphenols (phloretin, naringenin, quercetin, epicatechin, chlorogenic acid and rosmarinic acid) on fructose caramelization in thermal model systems at either neutral or alkaline pH. These polyphenols were found to increase the browning intensity and antioxidant capacity of caramel. The chemical reactions in the system of sugar and polyphenol, wh ...
- DOI:
- 10.1016/j.foodchem.2013.06.053
- PubMed:
- 23993506
- https://doi.org/10.1016/j.foodchem.2013.06.053
- Author:
- Alessandra Durazzo; Elena Azzini; Maria Claudia Lazzè; Anna Raguzzini; Roberto Pizzala; Giuseppe Maiani
- Source:
- Agriculture 2013 v.3 no.2 pp. 285-298
- ISSN:
- 2077-0472
- Subject:
- Diplotaxis tenuifolia; antioxidant activity; antioxidants; ascorbic acid; bioactive compounds; cytotoxicity; human cell lines; interphase; lutein; mitosis; nutritive value; polyphenols; quercetin; Mediterranean region
- Abstract:
- ... Wild rocket [Diplotaxis tenuifolia (L.) DC.] belongs to the Brassicaceae family and has its origin in the Mediterranean region. The effect of conventional and integrated cultivation practices on the nutritional properties and benefits of wild rocket [Diplotaxis tenuifolia (L.) DC.] were studied. Bioactive molecules content (vitamin C, quercetin, lutein), antioxidant properties and bioactivity of p ...
- DOI:
- 10.3390/agriculture3020285
- https://doi.org/10.3390/agriculture3020285
- Author:
- Berker Kadriye Isil; Ozdemir Olgun F. Ayca; Ozyurt Dilek; Demirata Birsen; Apak Resat
- Source:
- Journal of agricultural and food chemistry 2013 v.61 no.20 pp. 4783-4791
- ISSN:
- 1520-5118
- Subject:
- absorption; alpha-tocopherol; antioxidant activity; antioxidants; ascorbic acid; beta-carotene; butylated hydroxyanisole; butylated hydroxytoluene; caffeic acid; catechin; ferulic acid; gallic acid; glutathione; herbal tea; olive oil; quercetin; rosmarinic acid; sodium hydroxide
- Abstract:
- ... The Folin–Ciocalteu (FC) method of performing a total phenolics assay, originally developed for protein determination, has recently evolved as a total antioxidant capacity assay but was found to be incapable of measuring lipophilic antioxidants due to the high affinity of the FC chromophore, that is, multivalent-charged phospho-tungsto-molybdate(V), toward water. Thus, the FC method was modified a ...
- DOI:
- 10.1021/jf400249k
- PubMed:
- 23627440
- https://doi.org/10.1021/jf400249k
23. Novel pro-oxidant activity assay for polyphenols, vitamins C and E using a modified CUPRAC method
- Author:
- Esin Kondakçı; Mustafa Özyürek; Kubilay Güçlü; Reşat Apak
- Source:
- Talanta 2013 v.115 no. pp. 583-589
- ISSN:
- 0039-9140
- Subject:
- absorbance; absorption; acetates; antioxidant activity; antioxidants; ascorbic acid; copper; egg albumen; equipment; linear models; oxidation; oxidative stress; polyphenols; quercetin; thiols
- Abstract:
- ... In this study, a direct assay, a modified CUPRAC (Cupric Ion Reducing Antioxidant Capacity) method, is developed to determine transition metal ion (Cu(II))-catalyzed pro-oxidant activity of polyphenolic compounds, vitamins C and E, and herbal samples in the presence of proteins containing thiol groups. Since transition metal ion-catalyzed pro-oxidant activity of phenolics is usually initiated with ...
- DOI:
- 10.1016/j.talanta.2013.06.006
- https://doi.org/10.1016/j.talanta.2013.06.006
- Author:
- Yong Seo Park; Myang Hee Im; Kyung-Sik Ham; Seong-Gook Kang; Yang-Kyun Park; Jacek Namiesnik; Hanna Leontowicz; Maria Leontowicz; Elena Katrich; Shela Gorinstein
- Source:
- Plant foods for human nutrition 2013 v.68 no.1 pp. 57-64
- ISSN:
- 0921-9668
- Subject:
- antioxidant activity; antioxidants; ascorbic acid; carotenoids; chlorophyll; cultivars; drug interactions; ethanol; fluorometry; fruit consumption; human health; humans; kiwifruit; metabolites; nutritive value; pharmacokinetics; phenol; quercetin; serum albumin; tea (beverage); ultraviolet-visible spectroscopy
- Abstract:
- ... The bioactivity of two kiwifruit’s cultivars growing under organic and conventional conditions were studied and compared. The bioactive compounds were extracted with water and ethanol using similar conditions which are applied in pharmaceutical applications and for daily fruit consumption such as tea drink. Antioxidant radical scavenging assays [ferric-reducing/antioxidant power (FRAP); cupric red ...
- DOI:
- 10.1007/s11130-013-0339-z
- PubMed:
- 23386202
- https://doi.org/10.1007/s11130-013-0339-z
- Author:
- Poovarodom, S.; Haruenkit, R.; Leontowicz, H.; Leontowicz, M.; Vearasilp, S.; Namiesnik, J.; Ruamsuke, P.; Trakhtenberg, S.; Gorinstein, S.
- Source:
- Acta horticulturae 2013 no.984 pp. 77-86
- ISSN:
- 0567-7572
- Subject:
- Fourier transform infrared spectroscopy; Salacca zalacca; anthocyanins; antioxidant activity; antioxidants; ascorbic acid; avocados; blood lipids; catechin; cultivars; drugs; durians; ethanol; fluorometry; fruit consumption; fruit extracts; fruits; human health; humans; kiwifruit; laboratory animals; mangoes; mangosteens; metabolism; metabolites; nutritive value; polyphenols; quercetin; rats; ripening; serum albumin; soil properties; tannins; vegetables
- Abstract:
- ... During the past two decades our international scientific group investigated in vitro the physicochemical and nutritional characteristics of some cultivars of durian at various stages of ripening, mangosteen and new cultivars of snake fruit in comparison with widely used avocado, kiwifruit and mango, and in vivo their influence on laboratory animals. The main objective of the present study was to s ...
- Author:
- Min Zhu; Shubo Han; Anthony L. Fink
- Source:
- BBA - General Subjects 2013 v.1830 pp. 2872-2881
- ISSN:
- 0304-4165
- Subject:
- Parkinson disease; antioxidant activity; antioxidants; atomic force microscopy; dopamine; high performance liquid chromatography; hydrophilicity; isomers; light scattering; oxidative stress; quercetin; risk factors
- Abstract:
- ... α-Synucein is a small (14kDa), abundant, intrinsically disordered presynaptic protein, whose aggregation is believed to be a critical step in Parkinson's disease (PD). Oxidative stress is reported to be a risk factor for dopamine cell degeneration in PD. Flavonoids are suggested to be important antioxidant against oxidative stress. Flavonoids were reported to inhibit fibrillization and disaggregat ...
- DOI:
- 10.1016/j.bbagen.2012.12.027
- https://doi.org/10.1016/j.bbagen.2012.12.027
- Author:
- Robson Borba de Freitas; Isabel Cristina da Costa Araldi; Aline Augusti Boligon; Thiele Faccin de Brum; Bruno Tomazele Rovani; Mariana Piana; Marina Zadra; Margareth Linde Athayde; Liliane de Freitas Bauermann
- Source:
- Natural product research 2013 v.27 no.18 pp. 1620-1624
- ISSN:
- 1478-6427
- Subject:
- Scutia; acute toxicity; antioxidant activity; antioxidants; ascorbic acid; bark; caffeic acid; catalase; catechin; freeze drying; gallic acid; high performance liquid chromatography; liver; malondialdehyde; quercetin; rats; tannins
- Abstract:
- ... Phytochemical analysis of lyophilised aqueous extract of the stem bark of Scutia buxifolia (SBSB) was carried out by determining total phenolics (0.280 ± 0.02 mg of gallic acid equivalents/g of extract), flavonoids (17.42 ± 2.95 mg of quercetin equivalents/g of extract) and tannins (1.28 ± 0.15 mg of catechin equivalents/g of extract) contents followed by a high-performance liquid chromatography/d ...
- DOI:
- 10.1080/14786419.2012.742080
- https://doi.org/10.1080/14786419.2012.742080
- Author:
- Rezzan Aliyazıcıoglu; Huseyin Sahin; Omer Erturk; Esra Ulusoy; Sevgi Kolayli
- Source:
- International journal of food properties 2013 v.16 no.2 pp. 277-287
- ISSN:
- 1094-2912
- Subject:
- antimicrobial properties; rutin; caffeic acid; vanillic acid; chlorogenic acid; yeasts; human health; propolis; quercetin; liquid chromatography; agar; benzoic acid; Pseudomonas aeruginosa; anti-infective agents; antioxidant activity; syringic acid; ferulic acid; antioxidants; bacteria
- Abstract:
- ... Propolis has highly biologically active natural substances. Propolis is rich in phenolic compounds, and is becoming increasingly popular because of its components' potential role in contributing to human health. Its composition is variable and depends on several factors. In this study, some individual phenolic compounds were analyzed and investigated in vitro biological activities of ten different ...
- DOI:
- 10.1080/10942912.2010.551312
- https://doi.org/10.1080/10942912.2010.551312
- Author:
- Bin Meng; Weina Gao; Jingyu Wei; Jijun Yang; Jianquan Wu; Lingling Pu; Changjiang Guo
- Source:
- Nutrition 2013 v.29 no.4 pp. 661-666
- ISSN:
- 0899-9007
- Subject:
- alanine transaminase; antioxidant activity; antioxidants; aspartate transaminase; cysteine; diet; glutathione; homocysteine; liver; malondialdehyde; metabolism; metabolites; methionine; quercetin; rats; serine; superoxide dismutase; taurine
- Abstract:
- ... OBJECTIVE: The aim of this study was to determine the effects of quercetin on homocysteine (Hcy) metabolism and hepatic antioxidant status in high methionine (Met)-fed rats. METHODS: Rats were fed for 6 wk the following diets: control, 1.0% Met, 1.0% Met and 0.1% quercetin, 1.0% Met and 0.5% quercetin, 1.0% Met and 2.5% quercetin-supplemented diets. Serum Hcy, Met, cysteine, serine, taurine, gluta ...
- DOI:
- 10.1016/j.nut.2012.10.012
- PubMed:
- 23410631
- https://doi.org/10.1016/j.nut.2012.10.012
- Author:
- Guazelli Carla F. S.; Fattori Victor; Colombo Barbara B.; Georgetti Sandra R.; Vicentini Fabiana T. M. C.; Casagrande Rubia; Baracat Marcela M.; Verri Waldiceu A.
- Source:
- Journal of natural products 2013 v.76 no.2 pp. 200-208
- ISSN:
- 1520-6025
- Subject:
- polymers; pectins; drugs; absorption; histology; models; mice; neutrophils; casein; quercetin; antioxidant activity; edema; interleukin-10; colitis; oral administration; interleukin-1beta; antioxidants; oxidative stress; colon
- Abstract:
- ... Quercetin (1) is an anti-inflammatory and antioxidant flavonoid. However, the oral administration of 1 did not lead to beneficial effects in experimental animal colitis models, which involve cytokines and oxidative stress. A possible explanation is that the absorption profile of 1 prevents its activity. Therefore, it was reasoned that the controlled release of 1 would improve its therapeutic effec ...
- DOI:
- 10.1021/np300670w
- https://doi.org/10.1021/np300670w
- Author:
- Olfa Baâtour; Hela Mahmoudi; Imen Tarchoun; Nawel Nasri; Najla Trabelsi; Rym Kaddour; Maha Zaghdoudi; Ghaith Hamdawi; Riadh. Ksouri; Mokhtar Lachaâl; Brahim Marzouk
- Source:
- Journal of the science of food and agriculture 2013 v.93 no.1 pp. 134-141
- ISSN:
- 0022-5142
- Subject:
- Origanum majorana; antioxidant activity; antioxidants; biosynthesis; enzymes; gallic acid; quercetin; reversed-phase high performance liquid chromatography; salt stress; salt tolerance; shoots; sodium chloride
- Abstract:
- ... BACKGROUND: Two varieties of Origanum majorana (Canadian and Tunisian) were evaluated for their phenolic, flavonoid and tannin contents, individual phenolic compounds and antioxidant activities under NaCl constraint. RESULTS: The results showed a significant variability in phenolic composition and antioxidant behavior between the two varieties under salt stress. The phenolic composition of methano ...
- DOI:
- 10.1002/jsfa.5740
- https://doi.org/10.1002/jsfa.5740
- Author:
- Pollyane da Silva Port's; Renan Campos Chisté; Helena Teixeira Godoy; Marcelo Alexandre Prado
- Source:
- Food research international 2013 v.53 no.2 pp. 875-881
- ISSN:
- 0963-9969
- Subject:
- Annona muricata; Bauhinia ungulata; Camellia sinensis; Chrysobalanus; Croton; Cymbopogon citratus; Lippia alba; Luehea; antioxidant activity; antioxidants; diet; gallic acid; green tea; herbs; high performance liquid chromatography; myricetin; quercetin; Amazonia
- Abstract:
- ... The consumption of tea increased significantly in the past few years as a result of its health benefits as potent antioxidants in the diet. However, studies on the antioxidant compounds from Brazilian tea are scarce. Thus, the aim of this work was to evaluate the total phenolic compounds (TPC) and total flavonoids (TF) contents and the antioxidant capacity (DPPH and β-carotene/linoleic acid system ...
- DOI:
- 10.1016/j.foodres.2013.02.010
- https://doi.org/10.1016/j.foodres.2013.02.010
- Author:
- Martinez L. Chaires; Vargas M. A. Perez; del Angel A. I. Cantor; Bermudez F. Cruz; Avalos H. A. Jimenez
- Source:
- Cereal chemistry 2013 v.90 no.3 pp. 263-268
- ISSN:
- 0009-0352
- Subject:
- 2,2-diphenyl-1-picrylhydrazyl; Chenopodium berlandieri; antioxidant activity; antioxidants; gallic acid; heat treatment; hydrochloric acid; ingredients; methanol; quercetin; seeds; solvents
- Abstract:
- ... Raw, germinated, popped, and cooked huauzontle (Chenopodium berlandieri spp. nuttalliae) seeds were analyzed for the contents of phenolics extracted with water (WE), methanol, 1:1 (v/v) methanol/water (MWE), and 1.2M HCl in 1:1 (v/v) methanol/water (HMWE); radical scavenging capacity measured by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (A ...
- DOI:
- 10.1094/CCHEM-03-12-0022-R
- https://doi.org/10.1094/CCHEM-03-12-0022-R
- Author:
- Federico J. Berli; Rubén Bottini
- Source:
- Journal of berry research 2013 v.3 no.1 pp. 1-14
- ISSN:
- 1878-5093
- Subject:
- Vitis vinifera; abscisic acid; acclimation; altitude; anthocyanidins; antioxidant activity; antioxidants; biosynthesis; energy; free radicals; grapes; latitude; leaves; phenol; phenolic acids; photostability; quercetin; red wines; solar radiation; stilbenes; stomatal movement; sugars; tropics; ultraviolet radiation; vineyards; winemaking
- Abstract:
- ... This review provides an overview of existing literature on the effects of ultraviolet-B (UV-B) radiation and abscisic acid (ABA) on physiological and biochemical aspects affecting grape berry (Vitis vinifera L.) growth, maturation and their quality for winemaking. The UV-B (280–315 nm) comprises only a small fraction of sunlight that reaches the Earth's surface, but has enough energy to cause larg ...
- DOI:
- 10.3233/JBR-130047
- https://doi.org/10.3233/JBR-130047