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 ...

Abstract A simple, fast, sensitive and accurate spectrophotometric method has been developed for the quantitative determination of cephalexin monohydrate in dosage form and in commercial formulations.

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

The proposed spectrophotometric method is simple and rapid for the in vitro determination of SPF values of sunscreens emulsions. Sunscreens; Cosmetic products; Sun protection factor; UV ...

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 ...

Yorkshire Water announce hosepipe ban - what you need to know The first hosepipe ban of the year has been declared for some parts of the UK. Here is what it means and who will be affected.

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 ...