The fatty acid composition of a thermophilic Bacillus sp. was altered by the addition of isobutyrate, isovalerate, a-methylbutyrate, leucine, and isoleucine to the growth medium. With isobutyrate, 81% of the fatty acids had 16 carbon atoms and 79% were iso-fatty acids with an even number of carbon atoms. With leucine, 58% of the fatty acids had 15 carbon atoms and 86% were iso-fatty acids with ...

The creation of carbon-carbon and carbon-heteroatom bonds by the oxidation of organocuprates is useful in a range of challenging contexts including the formation of biaryl bonds within medium rings, diene synthesis and the coupling of tertiary carbon centres. This tutorial review introduces these applications and recent developments which have served to improve its functional group tolerance an...

the the main objective of this research paper is to present 3-d elasticity solution for free vibration analysis of elastically supported continuously graded carbon nanotube-reinforced (cgcntr) annular plates. the volume fractions of oriented, straight single-walled carbon nanotubes (swcnts) are assumed to be graded in the thickness direction. an equivalent continuum model based on the eshelby-m...

Three strains of cyanobacteria (Anabaena PCC7120, A. variabilis and Nostoc commune), all belonging to the family Nostocaceae, were found to be capable of modulating the production and chemical composition of extracellular polysaccharides (EPS) in response to carbon and nitrogen availability as well as pH. While the carbohydrate compositions of the glycans produced by the different organisms wer...

the extraction of gadolinium (gd) from perchlorate and nitrate media in 1,2-dichloroethane(c2h4cl2), carbon tetrachloride (ccl4) and chloroform (chcl3) by mixtures of 2-thenoyltrifluoroacetone (htta) and a crown ether benzo-15-crown-5 (b15c5) is investigated.the composition of the extracted species is determined as gd(tta)3.nb15c5 (n=1 in nitratemedium and n=2 in perchlorate medium). the values...