Polar lipids of cotton seeds and the products of their processing

The compositions and amounts of polar lipids in cotton seeds and the products of their processing have been investigated. Six glycolipids have been identified, the main ones being monogalactosyldiglyceride (MGDGs), digalactosyldiglycerides (DGDGs), and sterol glycosides. The fatty acid compositions of the neutral lipids and of the phospho- and glycolipids have been determined. In the glycolipids, saturated fatty acids — palmitic and stearic — predominated.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 194–198, March–April, 1993.     

Mechanism of contamination with aflatoxins of cotton seeds and products of their processing

A possible mechanism of the contamination of cotton seeds and the products of their processing with aflatoxins has been studied. It has been found that the contamination of cotton seeds with aflatoxin takes place mainly on storage in the cotton ginning factory and the oils and fats combine. In the processing of the cotton seeds, part of the aflatoxins passes into the final products and part decomposes. Meal stored in the oil and fats combine undergo secondary contamination with aflatoxins.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 118–123, January–February, 1988.     

Lipids of the products of processing of cotton seeds

The free, bound, and strongly bound lipids of the crushed seeds, pulp, husks, and meal have been characterized. It has been shown that the bound and strongly-bound lipids differ from the free lipids by a higher level of saturated acids. The acid numbers of the bound lipids are 5–6 times higher than those of the free lipids.Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 66–68, January–February, 1989.     

Accelerated semimicro method of determining the amount of free gossypol in cotton seeds and the products of their processing

A semimicro method is proposed for determining the amount of free gossypol in liquid and solid materials using 70% aqueous acetone as the gossypol extractant.     

Accelerated semimicro method of determining the amount of free gossypol in cotton seeds and the products of their processing

A semimicro method is proposed for determining the amount of free gossypol in liquid and solid materials using 70% aqueous acetone as the gossypol extractant.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 608–612, September–October, 1979.     

Neutron-activation analysis of bauxites and products of their processing

The analysis of bauxites, products of their processing and bauxite-bearing rocks was carried out with a technique of multielement neutron activation. The procedure used permits the accurate and sensitive determination of 10–13 elements from one sample.     

Changes in lipids and pigements of cotton seeds during their processing

The lipid and pigment compositions of crude and refined bleached cottonseed oil have been studied and the influence of the technological treatment on the composition and structure of the components is discussed. It has been found that the color and the difficult refinability of the crude oil are due partially to the presence in it of stable radical dications of gossypol photoinduced in the presence of O₂.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 42–50, January–February, 1988.     

Surface properties of the reserve globulins of cotton seeds and the products of their proteolysis

The rheological properties of interphase adsorption layers of enzymatic derivatives of the reserve globulins of cotton seeds at liquid phase-separation boundaries have been investigated. It has been established that the modification of the structure of the protein as a result of limited proteolysis by trypsin leads to a change in the surface properties of the layers formed. These layers possess thixotropic properties.Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 290–293, March-April, 1995. Original article submitted October 17, 1994.     

Lipid complex of the kernels of seeds of cotton plants of the wilt-resistant variety 175-F

The amount, qualitative and class compositions, and total fatty acid composition of the free, bound, and strongly bound lipids of kernels of the seeds of cotton plant of variety 175-F have been determined, and with the aid of enzymatic hydrolysis the strongly bound lipids have been isolated from the cottonseed kernels in the native form. It has been established that more than half the weight of the lipids comprises neutral varieties and the remainder are polar components. The lipids of the more stable lipid-protein complexes possess a higher degree of saturation.Institute of Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 314–318, May–June, 1991.     

Dimeric products of the degradation of cotton lignin and rice hulls

The conditions have been developed for the GLC separation of the dimeric products of the decomposition of lignins, and dehydroisoeugenol and 1-(4-hydroxy-3-methoxyphenyl)-2-(2-methoxyphenoxy)propan-1-ol have been identified.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 93–96, January–February, 1990.     

Arc atomic emission determination of noble metals in mineral raw materials and products of their processing

A procedure has been developed for the direct atomic emission determination of medium concentrations of noble metals in mineral raw materials and products of their processing. The procedure is based on the application of a spectral complex, consisting of an arc source of spectrum excitation, a DFS-8 spectrograph, a receiver of spectrum emission with CCD structures, and a registration system including software. The detection limits are n × 10^?5% for a number of noble metals and n × 10^?7% for Ag with RSD of 7?C14%.     

Selenization of cotton products with NaHSe endowing the antibacterial activities

Selenization reaction with the in situ prepared NaHSe has been successfully developed to occur in aqueous solution. The technique affords a method to upload the bioactive Se element on cotton products in semi-industrial scale. The antibacterial tests revealed that the selenized cotton possessed a potent and prolonged antimicrobial effect against both Gram-positive S. aureus and Gram-negative E. coli bacteria.This work discloses a practical method for preparing the selenium-containing antibacteri...     

The chemical study of the main phospholipids of the seed kernels of cotton plants of the speciesGossypium barbadense

The qualitative and quantitative compositions and also the general and position distributions of the fatty acids of the seeds of the thin-fibered varieties of the cotton plant S-6022, S-6015, S-6034, S-6037, and 9123-I have been studied.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 291–294, May–June, 1984.     

Isolation of the phospholipids of the cotton plant and their composition

Summary The yields of the free and bound lipids of the seed kernels of cotton plants of varieties S-4727 and S-6029 have been determined by their successive treatment with selective solvent, and the total and fractional proportions of lipid phosphorus have been found.The phospholipids have been solated and their group composition has been determined; it has been established that the main components are phosphatidylcholines, phosphatidylinositols, and phosphatidylethanolamines, while polyglycerophosphatides, lysophosphatidylcholines, and unidentified polar phospholipid are present in small amounts.The fatty-acid compositions of the free and bound lipids and phospholipids have been studied.Institute of the Chemistry of Plant Substances, Academy of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 449–453, July–August, 1975.