V. M. Tul'chinskii

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IR-technique was applied to study baker's yeast cell and its envelope fragments. The quantitative evaluation of spectra was made using the polysaccharide band at 1070 cm-1 as the bench one. The comparison of the spectra of the whole cells and of the envelope fragments suggested that the spectrum of the yeast cell was governed by the composition of its(More)
1. Two types of conformational states differing in the nature of their spectra in the far IR region have been found for a number of methylamides of N-acetyl-L-amino acids (in the solid state). 2. The changes in the IR spectra in the far infrared with an increase in the length of the peptide chain and with a change in the sequence and configuration of the(More)
1. The results of an analysis of the spectra of cyclic peptides in the middle and far IR regions have enabled the characteristic vibrations of the cis configuration of the amide group to be distinguished. 2. A difference has been found in the IR spectra of planar and nonplanar piperazinedione rings. 3. The frequency of the stretching vibration of the(More)
Analysis of the IR spectra of waxes isolated from samples of paints from paintings dating from the Ist to VIIth centuries of our era and fragments of archaeological antique murals has shown that in some cases the wax isolated is pure beeswax and in others it contains as impurities what are presumably resin acids, and also salts of fatty acids. The IR(More)
Polymeric compounds have been isolated from archeological specimens (fragments of Central Asian paintings of the 2nd-19th centuries). A comparison of their IR spectra with the spectra of plant gums has shown that they are polysaccharides which have remained undestroyed for up to 1800 yr. In some cases it has been possible from the IR spectra and composition(More)
Samples of freshly prepared soluble, naturally aged soluble, and insoluble gelatins (an accumulation of glue taken from a wooden sculpture of the XVth century) before and after heating at 210°C have been investigated by IR spectroscopy. The IR spectra of the samples before heating consisted of the characteristic spectra of collagen or gelatin although there(More)
IR spectroscopy is suggested as a convenient method for determining the difference in the cyclic (dioxomorpholine) and acyclic forms of N-aldonoyl amino acid derivatives. It has been shown that in the acyclic forms, unlike the cyclic, there are strong absorption bands at 1570 cm−1 and 690–720 cm−1 corresponding to the amide II and V vibrations.
IR-technique was used to study the effect of yeast cells treatment by water-alcohols mixtures on the quantitative relationship between the intensities of different bands in the spectra. The analysis of spectra made it possible to suggest that the reflection of the IR-irradiation from the cell is governed by the nucleoprotein layer of its envelope. It is(More)
By IR spectroscopy in the middle and far regions of the spectrum it has been found that on being heated with KBr a number of cyclic hexapeptides with L(D)-alanine and glycine residues undergo a transition from a mixture of various conformers into a monotypical conformational state corresponding to the “pleated sheet” structure with two trans-annular(More)
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