Before applying the colorimetric method, the extraction procedure had to be previously defined. So, DPPH assay was selected and the influence of time, temperature, amount of lyophilized samples and ...

Caffeine, DPPH (cat. no. 257621), and zinc diethyldithiocarbamate (cat ... (Beijing, China). SIRT3 Direct Fluorescent Screening Assay Kit (cat. no. KA1369), Superoxide Dismutase (SOD) Activity Assay ...

Finally, the five selected strains could chelate ferrous ions; tolerate hydrogen peroxide; and scavenge DPPH, hydroxyl radicals, and superoxide anions. After passing the safety test, antimicrobial ...

6-Hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox, 98%) was purchased from the supplier (TCI). 1,1-Diphenyl-2-picrylhydrazyl (DPPH, 95%) 5,5’-Dithiobis-(2-nitrobenzoic acid) (DTNB, 99%) ...

Adriana Dias and co-authors report a low-cost bioassay for the detection of low concentrations of lead in drinking water. The approach uses a genetically modified strain of Escherichia coli, which ...

School of Biological and Chemical Engineering, Ningbo Tech University, Ningbo 315100, China ...