Cardiac glycosides of Erysimum contractum. II

The structure of a new cardiac glycoside isolated from the seeds ofErysimum contractum has been established. The glycoside, which has been called nigrescigenin digilanidobioside is 3β,5,11α,14-tetrahydroxy-19-oxo-5β,14β-card-20(22)-enolide 3-O-(4-O-β-D-glucopyranosyl-β-D-digitoxopyranoside).     

Color Centers in Irradiated Potassium Picrate

The kinetics of the formation of color centers in solid potassium picrate in a -radiation field was studied. Optical spectra in potassium picrate were studied for the first time. The transmission spectra of irradiated crystals of potassium picrate displayed peaks at 515 (2,6-dinitro-para-quinone) and 630 nm (a picric acid-derived radical containing the nitrite group), with the intensity increasing with an increase in the absorbed dose. The potassium picrate radiolysis scheme is discussed.     

Cardenolide glycosides ofCheiranthus allioni. XV. Glucocheiranthoside

Another new cardenolide glycoside has been isolated from the plantCheiranthus allioni Hort., and has been named glucocheiranthoside. Its chemical structure has been established as 3-(4-O--D-glucopyranosyl--D-gulmoethylpyranosyloxy)-14-hydroxy-19-oxo-5,14-card-20(22)-enolide.State Scientific Center for Drugs, Ukraine, 310085, Kharkov, USSR. ul. Astronomicheskaya, 33. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 269–271, March–April, 1994.     

Determination of Material Parameters of Photorefractive Crystals Using Adaptive Holographic Interferometry

Optics and Spectroscopy - Holographic interferometry methods, based on mixing of a stationary reference light beam and a phase-modulated signal beam at the related perturbations of the dielectric...     

Cardenolide glycosides ofCheiranthus allioni. XVI. Neoevonoside and cellobiosyl-digigulomethyloside

Another three isomeric glycosides have been isolated from the seeds ofCheiranthus allioni Hort., two of which are new: after their chemical structures were determined they were named neoevonoside and cellobiosyl-digigulomethyloside.State Scientific Center for Drugs of the Academy of Sciences and the Ministry of Health of the Ukraine, 310085, Kharkov, ul. Astronomicheskaya, 33. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 66–69, January–February, 1996. Original article submitted May 22, 1995.     

The influence of the acetate group in the polyvinyl alcohol structure on the direct blackening photostimulated processes in the polymer–zinc oxide–salt of metal photosensitive composition

In this presented paper, we will investigate the photographic characteristics of photosensitive compositions which consist of a polymer, zinc oxide and salt of metal using the examples of PVA–ZnO–BiCl₃ and PVA–ZnO–Pb(CH₃COO)₂ compositions. An experimental result of the dependence between the photographic characteristics of a similar system and the content of the acetate groups in the polymer structure, and its explanation are presented here.     

3-Epistrophanthidin and 3-epistrophanthidol

Conclusions The hydrolysis of the total glycosides of the seeds ofStrophanthus kombé Oliv. and the adsorption-chromatographic separation of the mixture of aglycones has given strophanthidin, strophanthidol, 17-H-strophanthidin, and two new cardenolides denoted by the symbols IM-38 and IM-40 in the individual state. On the basis of the investigations carried out, the new cardenolides have been characterized provisionally as 3-epistrophanthidin and 3-epistrophanthidol.Khimiya Prirodnykh Soedinenii, Vol. 5, No. 6, pp. 508–511, 1969     

Radio-Frequency Method for Measuring the Water Content of Liquids

The method for radio-frequency measurements of water content in nonaqueous liquids is improved, and a procedure for measuring the concentration of water emulsified in oils and diesel fuels is described. Correlations between the composition of emulsions studied and the attenuation of the energy of electromagnetic radiation passing through the emulsions are revealed.     

Cardiac glycosides of Cheiranthus allioni. V

Conclusions Two additional cardiac glycosides, glucoerysimoside and glucoerysimosol, have been isolated from the seeds ofCheiranthus allioni Hort. Glucoerysimoside is strophanthidin 3-[O--D-digitoxopyranosyl-(4 1)-O--D-glucopyranosyl-(4 1)--D-glucopyranoside]. Glucoerysimosol is a new cardenolide having the same carbohydrate component, but its aglycone is strophanthidol. From these glycosides a new trisaccharide has been obtained which has been characterized as 4-O--cellobiosyl-D-digitoxose.Khar'kov Scientific-Research Institute of Pharmaceutical Chemistry. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 566–571, September–October, 1970.