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Biomedical subjects

W C Evans

Publications and source records attributed to W C Evans.

At least 19 recordsLinked to original sources
PubMed2000

Annatto: a natural choice.

Annatto is a pigment derived from the seeds of Bixa orellana. It has been used from antiquity in South America and for over 100 years in Europe. It is now an important safe additive for a wide range of food, partly finding favour due to its natural origin.

Bixaceae↗
PubMed1983

Chemical and toxicological studies on bracken fern, Pteridium aquilinum var. latiusculum. VIII. The inability of bracken extracts containing pterosins to cause cattle bracken poisoning.

Methanol extracts of bracken frond and rhizomes prepared using a metallic extraction vessel, were proved incapable of producing bracken poisoning in calves. Nevertheless, they contained appreciable quantities of pterosins and pterosides. Thus the poisonous principle(s) in bracken responsible for the toxicological effects are not associated with these major sesquiterpenoids of the plant.

Animals↗
PubMed1977

Biochemistry of the bacterial catabolism of aromatic compounds in anaerobic environments.

Methods of aerobic degradation of aromatic compounds in the biosphere are well understood, but it is only relatively recently that it has been shown how some bacteria can also degrade these substrates in the absence of molecular oxygen. This occurs by photometabolism (Athiorhodaceae), nitrate respiration (Pseudomonas and Moraxella sp.) and methanogenic fermentation (a consortium) in which the benzene nucleus is first reduced and then cleaved by hydrolysis to yield aliphatic acids for cell growth. These methods may be used by microbial communities to catabolise man-made pollutants.

Anaerobiosis↗