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By acetylating weakly substituted Na and H carboxymethylcelluloses and methylcellulose we have synthesized acetone-soluble highly substituted mixed derivatives of cellulose — acetocarboxymethylcellulose and acetomethylcellulose. Water-soluble products have been obtained from these esters by...
This review gives literature information on the glucan polysaccharides of higher plants, excluding glucans of the type of starch and cellulose.
This review generalizes information on the use of the 1 H and 13 C NMR methods for studying the structure, stereochemistry, and conformation of flavan-3-ols, proanthocyanidins, and their derivarives.
The compositions and structures of the lipids and lipophilic components of the seeds of Artemisia leucodes Sch. have been determined with the aid of the mass-spectrometral method and chemical transformations.
We have studied the chemical and spectral properties of estragonoside — a new flavonoid compound isolated from the epigeal part of Artemisia dracunculus L. (variety Gribovskii) and having the structure of 4′,5,6,7,8-pentahydroxy-3′-methoxyflavone 8-O-α- L -rhamnopyranoside. Pinocembrin...
We have investigated the electrophoretic compositions of the zeins of various lines and forms of maize cultivated in Uzbekistan. It has been found that, according to their electrophoretic spectra, the zeins of the various lines and forms of maize differ from one another with respect to the...
The literature on proteinase inhibitors of plant origin over the last 15 years is discussed. The results of investigations are permitting an expansion of our ideas on the regulatory and protective functions of proteinase inhibitors, which play a primary role in the resistance of plants to...
The new N-benzyltetrahydroisoquinoline alkaloid nummularine has been isolated from the leaves of Berberis nummularia . On the basis of a study of its spectral characteristics (PMR, IR, and mass spectra), the structure of nummularine has been established as...
For the quantitative determination of triterpene glycosides in the fruit of the Japanese pagoda tree, Sophora japonica , and of other plants, gravimetric and spectrophotometric methods of analysis with an error of the determination of the total glycosides of about 10% are proposed.
A scheme has been developed for the selective conjugation of 20-hydroxyecdysone (20E) at the 25- position, with the synthesis of 20E 25-acetate as an example. The proposed scheme also permits the selective, synthesis of 20E 22-esters from both lower and higher fatty acids, which opens up...
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