[5]Measurement of oxygen radical absorbance capacity in biological samples

Author(s):  
Guohua Cao ◽  
Ronald L. Prior
Author(s):  
Greeshma Murukan ◽  
Murugan K.

Objective: The present study evaluates purification, characterization of anthocyanin from in vitro culture of teak and its antioxidant potential.Methods: Anthocyanin was extracted from in vitro culture, purified by using amber lite XAD column and fractionated by Liquid chromatography mass spectrometry (LC-MS/MS). Various antioxidant assays were carried such as 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH), 2,2'-azino-bis-3-ethyl-benzothiazoline-6-sulphonic acid (ABTS), Oxygen radical absorbance capacity (ORAC), Nitric oxide (NO) and Hydrogen peroxide (H2O2).Results: Liquid chromatography mass spectrometry (LC-MS/MS) revealed the major fraction as cyanidin 3-(2-xylosyl-rutinoside) with unknown peaks. The amount of anthocyanin was 15.23 mg/g monomeric anthocyanin. Further, the potential antioxidant capacity of the teak anthocyanin was comparable to common vegetables and fruits. Similarly, high correlations of anthocyanin with antioxidant activity, such as oxygen radical absorbance capacity (ORAC), 2,2'-azino-bis-3-ethyl-benzothiazoline-6-sulphonic acid (ABTS), and 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) (r = 0.95, 0.93, and 0.80) were found.Conclusion: The high anthocyanins content and potential antioxidant activity suggests that teak anthocyanin may be applied in the food industry as a good source of natural pigments


2016 ◽  
Vol 22 (2) ◽  
pp. 301-305
Author(s):  
Manabu Wakagi ◽  
Yuuki Taguchi ◽  
Jun Watanabe ◽  
Tasuku Ogita ◽  
Masao Goto ◽  
...  

2014 ◽  
Vol 75 ◽  
pp. S38 ◽  
Author(s):  
E Dorta ◽  
E Atala ◽  
A Aspee ◽  
H Speisky ◽  
E Lissi ◽  
...  

2011 ◽  
Vol 6 (2) ◽  
pp. 1934578X1100600 ◽  
Author(s):  
Phan Van Kiem ◽  
Nguyen Xuan Cuong ◽  
Nguyen Xuan Nhiem ◽  
Dan Thi Thuy Hang ◽  
Nguyen Hoai Nam ◽  
...  

One new megastigmane glycoside, ficalloside (1), and eleven known compounds, were isolated from methanol extract of Ficus callosa leaves by repeated column chromatography. Their structures were established on the basis of spectral and chemical evidence. The antioxidant activities of these compounds were measured using the oxygen radical absorbance capacity (ORAC) assay. Compound 8 exhibited potent antioxidant activity of 10.6 μM trolox equivalents at the concentration of 2 μM. At this concentration, compounds 4-7 and 9-12 showed significant antioxidant activity with ranging of 2.1~6.1 μM trolox equivalents.


LWT ◽  
2012 ◽  
Vol 45 (2) ◽  
pp. 241-245 ◽  
Author(s):  
Li Fan ◽  
Claudine Dubé ◽  
Chengquan Fang ◽  
Dominique Roussel ◽  
Marie Thérèse Charles ◽  
...  

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