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Synthesis and evaluation of changes induced by solvent and substituent in electronic absorption spectra of some azo disperse dyes.
Five azo disperse dyes were prepared by diazotizing 4'-aminoacetophenone and p-anisidine and coupling with varies N-alkylated aromatic amines. Characterization of the dyes was carried out by usin...Read More
Involvement of proton transfer in the reductive repair of DNA guanyl radicals by aniline derivatives.
The most easily oxidized sites in DNA are the guanine bases, and major intermediates produced by the direct effect of ionizing radiation (ionization of the DNA itself) are electron deficient guanine s...Read More
The thioureido derivative of 4-aminoacetophenone aryl semicarbazone have been prepared. These derivatives have been characterised on the basis of different physicochemical evidences. The anti-HIV-1 (H...Read More
[Determination of p-aminoacetophenone and changes in its levels in a levorin producer depending on culture conditions].
A method for spectrophotometric determination of p-aminoacetophenone (p-AAP) in the mycelium and fermentation broth filtrates of organisms producing polyenic macrolide antibiotics is described. The le...Read More
Identification of aromatic moieties and mycosamine in antifungal heptaenes with high-performance liquid chromatography, high-performance liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry.
A high-performance liquid chromatographic (HPLC) method for the determination of the aromaticity of heptaene polyene antibiotics has been developed. The released aromatic moiety of the heptaene polyen...Read More
In the title compounds, 4-carboxyanilinium bromide, C(7)H(8)NO(2)(+) x Br(-), (I), and 4-acetylanilinium bromide, C(8)H(10)NO(+) x Br(-), (II), each asymmetric unit contains a discrete cation with a p...Read More
The effect of p-aminobenzoic acid on the biosynthesis of levorin was studied. It was shown that in the presence of exogenic p-aminobenzoic acid the antibiotic activity increased by 11 per cent. The ac...Read More
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