The globulins of cotton seeds XII. The structure of the 7S-globulin

Summary 1. The 7S globulin of cotton seeds consists of eight polypeptide chains of two types differing by their contents of carbohydrates and of amide groups.2. On the basis of the results of a study of the amino-acid sequences of the peptides obtained by cleaving the 7S globulin with trypsin and chymotrypsin, its complete primary structure has been put forward.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 687–690, September–October, 1977.     

Proteins of the seeds ofRicinis communis. I. A study of the water-soluble proteins of the seeds and meal ofRicinis communis

The electrophoretic spectrum of the water-soluble proteins of the seeds and meal of the castor-oil plant has been studied. A correlation has been found between a decrease in the relative amount of electrophoretic components with R_f 0.04 and 0.11 and the hemagglutinating activity of the meal.     

The total flavonoids fromThermopsis alterniflora, Th. dolichocarpa, Vexibia alopecuroides, andRhaponticum carthamoides and their hypolipidemic activity

The total flavonoids have been isolated from the epigeal part ofThermopsis alterniflora andTh. dolichocarpa, and the roots and rhizomes ofVexibia alopecuroides, andRhaponticum carthamoides the compositions of the flavonoids present in each of the total extracts have been determined. It was found that the total flavonoid extracts investigated exhibited different degrees of hypolipidemic activity in relation to normal animals and animals with experimental hyperlipidemias. The total flavonoids fromTh. alterniflora possessed the most pronounced hyperlipidemic action.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (371) 120 64 75. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 174–177, March–April, 1999.     

Structure of mucroflavone A

A new flavonoid, mucroflavone A, is isolated from the terrestrial part ofTanacetopsis mucronata (Regel. et Schmalh.) S. Kovalevsk. IR, mass, UV, and PMR spectra are compared with those of related compounds to provide a basis for proposing the structure 5,6,4′-trihydroxy-8,3′-dimethoxyflavone for mucroflavone A. Deceased. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 725–729, November–December, 1999.     

Deep level emission of ZnO nanoparticles deposited inside UV opal

The temperature-dependent photoluminescence spectra of zinc oxide (ZnO) nanocrystals deposited inside the ultraviolet (UV) opal were studied. ZnO was grown in the voids between FCC packed SiO₂ spheres using spray pyrolysis under ultrasonic vibration in the solution containing a zinc nitrate precursor. The ZnO nanoparticles inside opal matrix with UV photonic band-gap exhibit suppression of the excitonic emission and enhancement of the deep level emission. Suppression of the excitonic lines is due to the inhibition of spontaneous emission, while enhancement and broadening of the DL emission in the green spectral region is due to Purcell effect. The infiltration of ZnO nanoparticles inside the photonic crystal may be a useful technique to increase its emission efficiency in the selected spectral region.     

Quantitative determination of ricinine in various samples of meal by an immunometric enzymatic method using affinity columns

A method has been developed for the quantitative estimation of ricinine in extracts and meal from two castor-oil plant seed tosters.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Fax (3712) 62 73 48. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 271–274, March–April, 1994.     

Acylated flavanone glycosides fromRicinus communis

Naringenin 7-O-(6″-O-p-coumaroly-β-D-glucopyranoside) and the new flavanone naringenin 7-O-(2″-O-p-coumaroyl-β-D-glucopyranoside) have been isolated from the seeds of Ricinus communis L. The structures of the compounds isolated were established on the basis of the results of chemical transformations and spectral characteristics.