نتایج جستجو برای: DPPH scavenging

تعداد نتایج: 20608  

2013
Hyeun Sung Song Jun Kyu Bae Inshik Park

This study was conducted to evaluate the increase of DPPH radical scavenging activity of meat substitute by heating. The meat substitute showed higher DPPH radical scavenging activity than those of other foods rich in protein such as beef, pork, chicken, and soybean curd. The DPPH radical scavenging activity of meat substitute was dependent upon concentration, heating temperature and heating ti...

Journal: :Biological & pharmaceutical bulletin 2009
Hiroshi Izuta Yukimi Narahara Masamitsu Shimazawa Satoshi Mishima Shin-ichi Kondo Hideaki Hara

The aim of this work was to investigate the antioxidant property of honeybee products and their constituents using an ESR method. Antioxidative activity was evaluated as the scavenging activity of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The DPPH radical scavenging activities, in descending order, were: ethanol extract of Chinese red propolis>ethanol extract of Brazilian green propolis>wat...

Journal: :iranian journal of diabetes and obesity 0
azadeh najarzadeh department of nutrition, health faculty, shahid sadoughi university of medical sciences, yazd, iran. hassan mozaffari-khosravi department of nutrition, health faculty, diabetes research center of yazd, shahid sadoughi university of medical sciences, yazd, iran. mahdieh mahdavi school of international campus, shahid sadoughi university of medical sciences, yazd, iran hossien fallahzadeh department of biostatistics and epidemiology, health faculty, shahid sadoughi university of medical sciences, yazd, iran javad zavar-reza department of biochemistry, school of medicine, shahid sadoughi university of medical sciences, yazd, iran hamidreza shahmoradi school of international campus, shahid sadoughi university of medical sciences, yazd, iran.

objective: oxidative stress is involved in the pathophysiology of diabetes and cardiovascular complications of metabolic syndrome. the main objective of this study was to evaluate total antioxidant status by diphenylpicrylhydrazyl (dpph)-scavenging activity in patients developed metabolic syndrome (mets). materials and methods: forty-four patients with mets diagnosed on the basis of adult treat...

Journal: :Pakistan journal of pharmaceutical sciences 2014
Abdur Rauf Ghias Uddin Haroon Khan Roohullah

To explore the free radical scavenging properties of crude ethanolic extract of galls, bark, leaves, roots of Pistacia integerrima and its subsequent solvent fractions viz., n-hexane, chloroform, ethyl acetate and methanol against 1, 1-diphenyl-2-picrylhydrazyl (DPPH) stable. In vitro DPPH based free radical was employed using querceitin as standard antioxidant while methanol as negative contro...

2010
P. Visweswara Rao Dhananjaya Naidu K. Madhava chetty

Radical Scavenging capacity Abstract: In-vitro antioxidant activity of methanolic extract of Rhinacanthus nasutus leaves was determined by DPPH free radical scavenging assay and Reducing Power assays. Ascorbic acid was used as standard and positive control for both the analysis. All the analysis was made with the use of UV-Visible Spectrophotometer. The methanolic extract of Rhinacanthus nasutu...

2015
Chetan Paliwal Tonmoy Ghosh Khushbu Bhayani Rahulkumar Maurya Sandhya Mishra Colin Barrow

Phycobiliprotein-containing water and carotenoid-containing methanolic extracts of three different cyanobacteria, Pseudanabaena sp., Spirulina sp. and Lyngbya sp., were studied for their DPPH scavenging, iso-bolographic studies, and anti-nephrolithe activities. The best EC50 values for DPPH scavenging were in Lyngbya water (LW, 18.78 ± 1.57 mg·mg(-1) DPPH) and Lyngbya methanol (LM, 59.56 ± 37.3...

2009
Xian-Sheng Wang Chuan-He Tang Ling Chen Xiao-Quan Yang

Hemp protein hydrolysates with various yields of trichloroacetic acid (TCA)-soluble peptides (Ysp) and surface hydrophobicity (Ho) were obtained by Neutrase ® hydrolysis from hemp protein isolate (HPI). The peptide profiles, amino acid composition and antioxidant activities (DPPH radical scavenging ability, reducing power and Fe chelating ability) of the hydrolysates, obtained at 60–240 min, we...

2015
Eun-Yi Koa Daekyung Kim Seong Woon Roh Weon-Jong Yoonc You-Jin Jeon Ginnae Ahn Kil-Nam Kim

In this study, the antioxidant properties of 80 % ethanol extracts of 16 species of plants from Jeju Island in Korea were evaluated using various antioxidant assays, including the DPPH (1,1-Diphenyl-2-pricrylhydrazyl) radical scavenging, superoxide scavenging, xanthine oxidase inhibition and hydrogen peroxide scavenging activities. Among the 16 plant extracts tested, CN-13 showed strong antioxi...

2005
Masahiro NISHIZAWA

tion, stable radicals have the advantage that their concentrations are readily and directly measurable. Among them a stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) was investigated as a reactive hydrogen acceptor and further found to be useful for the antioxidant determination. Since then DPPH has been mainly used to examine radical scavenging activity of antioxidative vitamins and po...

Journal: :Bioscience, biotechnology, and biochemistry 2004
Shizuka Saito Yasuko Okamoto Jun Kawabata

DPPH radical scavenging reactions of protocatechuic acid and its methyl ester were investigated in various solvents. In alcoholic solvents, methyl protocatechuate rapidly scavenged more than four equivalents of the radical, whereas approximately two equivalents were consumed in aprotic solvents. Methyl, ethyl, butyl, isopropyl, and tert-butyl protocatechuates were examined for their DPPH radica...

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