20 Result(s)

Article

Vegetable Tanning Agents

The distribution and structure of hydrolyzed tannins, the separation of tanning agents and their quantitative determination, methods for preparing tanning extracts, methods for increasing the eff...

S. M. Mavlyanov, Sh. Yu. Islambekov, A. I. Ismailov… in Chemistry of Natural Compounds (2001)

Article

Anthocyans and organic acids of the fruits of some species of sumac

S. M. Mavlyanov, Sh. Yu. Islambekov, A. K. Karimdzhanov… in Chemistry of Natural Compounds (1997)

Article

Tannins ofGeranium sanguineum

A study has been made of the phenolic compounds ofGeranium sanguineum. One tannin of the hydrolyzable series has been isolated from the epigeal part, and for this the structure of 1,3-bis-O-digalloyl-2-O-galloyl-...

S. M. Mavlyanov, Sh. Yu. Islambekov, F. G. Kamaev… in Chemistry of Natural Compounds (1997)

Article

Polyphenols of the fruits of some varieties of pomegranate growing in Uzbekistan

S. M. Mavlyanov, Sh. Yu. Islambekov, A. K. Karimdzhanov… in Chemistry of Natural Compounds (1997)

Article

Molecular and crystal structures of hemigossypolone and gossypolone

The results are given of an x-ray structural investigation of hemigossypolone isolated from the stems of a wiltinfected cotton plant and of gossypolone obtained by oxidizing gossypol.

S. A. Talipov, B. T. Ibragimov, K. M. Beketov… in Chemistry of Natural Compounds (1995)

Article

Phenolic compounds of some tannide-bearing plants and their pharmacological activity

S. M. Mavlyanov, Sh. Yu. Islambekov, A. I. Ismailov… in Chemistry of Natural Compounds (1995)

Article

Phenolic compounds of sumac

The main component of the polyphenolic complex has been isolated from the leaves of two species of sumac (Rhus glabra andRh. typhina) and for this we have proposed the structure of 3,6-bis-O-digalloyl-1,2,4-tri-O...

Sh. Yu. Islambekov, S. M. Mavlyanov, F. G. Kamaev… in Chemistry of Natural Compounds (1994)

Article

Phenolic compounds ofGeranium sanguineum

The chemical composition of the phenolic compounds of the epigeal part of blood-red geranium has been studied. The structure of the main substance of the polyphenolic complex of the plant has been established ...

S. M. Mavlyanov, Sh. Yu. Islambekov, F. G. Kamaev… in Chemistry of Natural Compounds (1994)

Article

Flavonoids of the cotton plant and plants close to it

This review gives information on the distribution of flavonoids (flavonol and anthocyanin glycosides, catechins, and proanthocyanidins in plants of the family Malvaceae, namely the various species of the gener...

A. I. Ismailov, A. K. Karimdzhanov, Sh. Yu. Islambekov… in Chemistry of Natural Compounds (1994)

Article

Vegetable tanning substances. Dependence of the tanning properties of extracts on their composition

Information is given on vegetable tanning substances, their classification, distribution in the plant world, and structure, and the dependence of their tanning properties on their composition, and also on meth...

Sh. Yu. Islambekov, A. K. Karimdzhanov, S. M. Mavlyanov… in Chemistry of Natural Compounds (1990)

Article

Catechins of sumac stems

Sh. Yu. Islambekov, S. M. Mavlyanov, A. K. Karimov… in Chemistry of Natural Compounds (1988)

Article

Polyphenols of some species ofRhus

A. K. Karimdzhanov, Sh. Yu. Islambekov, S. M. Mavlyanov… in Chemistry of Natural Compounds (1986)

Article

Tanning substances ofGeranium rectum

S. M. Mavlyanov, Sh. Yu. Islambekov, A. K. Karimdzhanov in Chemistry of Natural Compounds (1984)

Article

Catechins and proanthocyanidins ofAlhagi pseudoalhagi

Sh. Yu. Islambekov, Kh. A. Mirzakhidov… in Chemistry of Natural Compounds (1982)

Article

Colorimetric method for the quantitative determination of hydrolyzable tannin substances

A colorimetric method of determining tannins is proposed for the analysis of Geraniaceae raw material and its extracts, and also of other tanning plants the tannides of which belong to the hydrolyzable series.

S. M. Mavlyanov, Sh. Yu. Islambekov, A. K. Karimdzhanov… in Chemistry of Natural Compounds (1981)

Article

Isolation of hemigossypol quinone from a cotton plant infected with wilt

From the stems of the cotton plant infected with the fungusVerticillium dahliae Kleb. has been isolated a quinone derivative of hemigossypol — hemigossypolone — for which the structure 8-formyl-6,7-dihydroxy-5-is...

Z. S. Abdullaev, A. K. Karimdzhanov, A. I. Ismailov… in Chemistry of Natural Compounds (1977)

Article

Structure of gossyvertin — A new phytoalexin of the cotton plant

A new phenolic compound — gossyvertin — has been isolated from the stems of a cotton plant infected with fungusVerticillium dahliae Kleb.; the structure 8-formyl-1,7-dihydroxy-5-isopropyl-2-methoxy-3-methylnaphth...

A. K. Karimdzhanov, A. I. Ismailov, Z. S. Abdullaev… in Chemistry of Natural Compounds (1976)

Article

PMR spectra of catechins and their derivatives

The PMR spectra of catechins, gallocatechins, epigallocatechin gallate, and their acetyl derivatives have been analyzed and the structures of the compounds investigated have been confirmed.

Sh. Yu. Islambekov, A. K. Karimdzhanov, A. I. Ismailov… in Chemistry of Natural Compounds (1976)

Article

Proanthocyanidins ofPolygonum coriarium

Sh. Yu. Islambekov, A. K. Karimdshanov, A. I. Ismailov… in Chemistry of Natural Compounds (1969)