Compound semiconductor/isolator (ZnS/silica) core/shell nanocables have been used to fabricate single nanowire-based field effect transistors. Using the surface-adsorbed charged molecules as the gate, the nanocablebased devices show potential for label-free, real-time, and sensitive detection of biological species. After chemical modification, amineand oxide-functionalized nanocables exhibit li...

Epithelial cells from hamster small intestine, in short term culture, incorporated [carbinol-14C]retinol into a compound that is identical to synthetic retinyl phosphate, as judged by chromatography on DEAE-cellulose, silicic acid, and thin layers of silica gel. The biological compound displays the same absorption spectrum as does synthetic retinyl phosphate with a maximum at 325 nm. Hydrolysis...

A new inhibitor of acyl-CoA:cholesterol acyltransferase (ACAT), designated lateritin, was isolated from the mycelial cake of Gibberella lateritium IFO 7188 by successive purification procedure of solvent extraction, silica gel column chromatography and reverse phase HPLC. Spectroscopic analyses of the compound yielded 4-methyl-6-(1-methylethyl)-3-phenylmethyl-1,4-perhydrooxazine-2,5- dione as t...

For CN(-) recognition, a series of bisindolyl compounds 1-3 were prepared, and their chromodosimetric color changes toward anions were investigated. Nucleophilic addition of the cyanide ion to the meso position of the bisindolyl group gave rise to breaking of the double bond conjugation, thereby inducing spectroscopic changes in the compound. Mesoporous silica nanoparticles 3 also gave color ch...

A series of new compounds with antiviral properties were isolated from a Bacillus sp. strain B-60. They were named sattabacin (1), hydroxysattabacin (2), sattazolin (3) and methylsattazolin (4). The biologically active compounds were recovered from fermentation broth by ethyl acetate extraction and silica-gel column fractionation. Their antiviral activity was mainly expressed against the Herpes...

The present study was designed to identify the DPPH (2, 2-diphenyl-1-picrylhydrazyl) free-radical scavenging constituents from methanol extract of L. nodiflora using bioassay-guided fractionation. The ethyl acetate fraction (EAF) revealed a strong antioxidant activity, compared to other fractions through in vitro DPPH radical-scavenging assay. The repeated fractionation of active EAF by silica ...