WE have undertaken a new determination of the 'conversion factor' relating the extinction factor to the biological activity of vitamin A. For the spectrophotometric and biological investigations ...

The USP Microbiology Expert Committee officially approved the use of recombinant Factor C for endotoxin testing in July 2024.

Martin Kahanec, the co-founder and scientific director of the Central European Labour Studies Institute (CELSI), has received ...

Ce IV has been used as an oxidizing agent in the determination of many pharmaceutical compounds by spectrophotometric 23, 24 and spectrofluorimetric 25 - 27 methods or by both of them 28, 29 and ...

Proanthocyanidins (PACs) are naturally occurring flavonoids possessing health beneficial bioactivities. Their quantification often utilizes the 4-dimethylaminocinnamaldehyde (DMAC) spectrophotometric ...

ORIGINAL PAPERS Determination of sun protection factor (SPF) of sunscreens by ultraviolet spectrophotometry Determinação do fator de proteção solar (FPS) de protetores solares por espectrofotometria ...

Biochemical assays articles from across Nature Portfolio A biochemical assay is an analytical in vitro procedure used to detect, quantify and/or study the binding or activity of a biological ...

Restrictions are due to be in place until groundwater stocks are back to where they need to be. Anyone who breaches the ban without permission from the water company could be fined as much as £ ...

Given their putative role in chemoprevention, validated methods are needed for quantification of total glucosinolates. Based on the colorimetric reaction of ferricyanide with 1-thioglucose, released ...