Impact of germination on antioxidant capacity of garden cress: New calculation for determination of total antioxidant activity

2019 ◽  
Vol 246 ◽  
pp. 155-160 ◽  
Author(s):  
Azza M. Abdel-Aty ◽  
Walaa H. Salama ◽  
Afaf S. Fahmy ◽  
Saleh A. Mohamed
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Total Antioxidant Activity ◽  
Garden Cress ◽  
Total Antioxidant

scholarly journals Analytical characterization of some pasteurized apple juices during storage

2015 ◽  
Vol 26 (1) ◽  
pp. 7-11
Author(s):  
Cristina Damian ◽  
Ana Leahu ◽  
Mircea Oroian ◽  
Sorina Ropciuc
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Activity Levels ◽  
Total Antioxidant Activity ◽  
Ascorbic Acid Concentration ◽  
Rotational Viscometer ◽  
Total Antioxidant ◽  
Radical Method

AbstractThe aim of the study was to assess the effect of three weeks of storage on the chemical and rheological properties of apple juices obtained from Idared and Jonatan apples variety. Total antioxidant activity, levels of bio-active compound groups and the viscosity were measured to characterize the investigated juices. The method applied for the determination of ascorbic acid concentration was with 2, 6-diclorophenolindophenol. Total phenols (TP) in apple juices were determined using the Folin-Ciocalteau method and antioxidant activity by the use of DPPH free radical method. The viscosity of apple juices was investigated by a rotational viscometer, Brookfield viscometer (Brookfield Engineering Inc., Model RV-DV I Prime) with RV spindles. During three weeks of storage, different rates of all measured properties have been observed decreasing for both studied apples varieties juices. The juices from Jonatan apples have higher antioxidant activities that are correlated with the higher content in polyphenols and lower values of viscosity.

scholarly journals Determination of Total Antioxidant Activity in Brain and Plasma: Limitations and Pitfalls † 311

1998 ◽  
Vol 43 ◽  
pp. 55-55
Author(s):  
Sidhartha Tan ◽  
Fen Zhou ◽  
Jian Shi ◽  
Jason P Eiserich ◽  
Dale A Parks
Keyword(s):  
Antioxidant Activity ◽  
Total Antioxidant Activity ◽  
Total Antioxidant

Flow injection potentiometric determination of total antioxidant activity of plant extracts

2006 ◽  
Vol 573-574 ◽  
pp. 419-426 ◽  
Author(s):  
Liliya K. Shpigun ◽  
Marina A. Arharova ◽  
Khena Z. Brainina ◽  
Alla V. Ivanova
Keyword(s):  
Antioxidant Activity ◽  
Flow Injection ◽  
Plant Extracts ◽  
Potentiometric Determination ◽  
Total Antioxidant Activity ◽  
Total Antioxidant

scholarly journals Multi-Method Determination of Antioxidant Capacity, Phytochemical and Biological Investigation of Four Different Solvent Extractives of Leucophyllum frutescens (cenizo)

2020 ◽  
Author(s):  
Imtiaz Ahmad ◽  
Saeed Ahmad ◽  
Huma Rao ◽  
Umer Shaukat ◽  
Muhammad Nadeem Shahzad ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Biological Activities ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Total Antioxidant Activity ◽  
Antioxidant Power ◽  
Total Antioxidant ◽  
Molybdate Method ◽  
Reducing Potential

The four solvent extractives obtained from aerial parts of Leucophyllum frutescens were evaluated for their Total Antioxidant Activity (TAA) by ammonium molybdate method, scavenging potential by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and Trolox-Equivalent Antioxidant Capacity (TEAC) assays, metal-reducing potential by Cupric Reducing Antioxidant Capacity (CUPRAC) and Ferric Reducing Antioxidant Power (FRAP) assays, Total Phenolic Content (TPC), Total Flavonoid Content (TFC) and their biological activities. The study concluded that BULE exhibited total antioxidant activity (226.235±1.222 mg AA.Eq.gm-1 DE±S.D) by molybdate method, CHLE exhibited more scavenging potential (DPPH 209.589±8.500 mg trolox Eq.gm-1 DE±S.D and TEAC 210.166±7.954 mg trolox Eq.gm-1 DE±S.D) and reducing potential (CUPRAC 646.889±16.889 mg trolox Eq.gm-1 DE±S.D & FRAP 472.981±15.625 mg trolox Eq.gm-1 DE±S.D). Phytochemical quantification concluded high TPC by BULE (189.369±1.393 mg GA.Eq.gm-1 DE±S.D) and high TFC by CHLE (232.458±1.589 mg Qu.Eq.gm-1 DE±S.D). Strong inhibition of α-glucosidase and urease enzymes was observed by HELE (IC50 0.3321±0.007 mg.ml-1±SD) and BULE (IC50 4.09±0.357 mg.ml-1±SD) extractives, respectively. The hemolytic effect shown by hexane extract (HELE) was higher with HA50 25.545±0.927 ug.ml-1±SD whereas methanol (MELE), chloroform (CHLE), and butanol (BULE) exhibited hemolytic effects at higher concentration with HA50 400.067±1.364, 321.394±1.332, and 332.957±0.465 µg.ml-1±SD, respectively. GC-MS profiling of HELE of L. frutescens was performed for qualitative analysis. The principal phytochemicals tentatively identified by GC-MS analysis of HELE accounts for fatty acids (60.221%), lignans (17.687%), ketones (3.358%), phenols (2.584%), sesquiterpenes (1.265%), and aldehydes (0.345%).

Comparative Electrochemical Determination of Total Antioxidant Activity in Infant Formula with Breast Milk

2013 ◽  
Vol 7 (2) ◽  
pp. 337-344 ◽  
Author(s):  
Nikoleta M. Lugonja ◽  
Dalibor M. Stanković ◽  
Snezana D. Spasić ◽  
Goran M. Roglić ◽  
Dragan D. Manojlović ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Breast Milk ◽  
Infant Formula ◽  
Electrochemical Determination ◽  
Total Antioxidant Activity ◽  
Total Antioxidant
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