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1.
The qualitative and quantitative compositions of the lipid complex of the epigeal part ofSilene brahuica Boiss. (family Caryophyllaaceae) have been studied. The fatty acid composition of the acyl-containing lipids has been determined.
Some differences have been found in the compositions of the fatty acids of the neutral lipids and the phospholipids.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. Translated from
Khimiya Prirodnykh Soedinenii, No. 4, pp. 512–514, July–August, 1993. 相似文献
2.
R. K. Rakhmanberdyeva D. A. Rakhimov A. Nigmatullaev 《Chemistry of Natural Compounds》1994,30(5):547-550
The water-soluble polysaccharides and pectin substances from the wastes of vegetable and melon-type crops have been studied
and their monosaccharide compositions have been determined. High- and low-methoxyl pectins have been isolated, and the physicochemical
characteristics are given.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89
14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 597–600, September–October, 1994. 相似文献
3.
Lipids and polysaccharides have been obtained from the leaves ofBrassica oleracea. The qualitative and quantitative compositions of the lipid complex have been studied. The fatty acid compositions of the total neutral lipids and of the phospho- and glycolipids have been determined. The carbohydrate complex of cabbage includes water-soluble polysaccharides, low-methoxyl pectins, hemicelluloses, and free monosugars. The polypeptides have been characterized by their mannoside compositions.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 612–615, September–October, 1994. 相似文献
4.
M. A. Khodzhaeva A. A. Razhabova G. R. Muzaffarova 《Chemistry of Natural Compounds》2006,42(5):509-511
The content of carbohydrates in Allium motor was studied as a function of vegetation period. The qualitative and quantitative compositions and physical chemical properties
of sugars soluble in alcohol, water-soluble polysaccharides, pectinic substances, and hemicellulose were characterized. Galacturonan
was produced by partial hydrolysis of the pectinic substances.
__________
Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 409–411, September–October, 2006. 相似文献
5.
A. O. Barabanova I. P. Tishchenko V. P. Glazunov T. F. Solov’eva I. M. Ermak 《Chemistry of Natural Compounds》2010,46(4):509-513
Polysaccharides isolated by successive extraction with water at 20 and 80°C from freshly collected and dried alga T. crinitus were compared. It was shown that the yield of polysaccharides from freshly collected alga was 40–44%; from dried material,
less than 25%. It was found that the amount of extracted polysaccharides and their molecular weights decreased upon storage
of dried alga for three years. Polysaccharides isolated from freshly collected and dried alga had identical structures and
were a mixture of κ/β- and a new X-type of carrageenan. It was shown that protein, the amount of which reached 24% in the extracts obtained at
20°C, was strongly bound to the carrageenan. The amino-acid compositions of the proteins associated with the polysaccharides
isolated at 20 and 80°C were identical and had an elevated content of serine, glutamic acid, glycine, and alanine. 相似文献
6.
The lipid complex of the seeds ofPeganum harmala (fam. Zygophyllaceae) has been investigated. The qualitative and quantitative compositions of the neutral lipids and the
phospholipids have been studied. The fatty acid compositions of the acyl-containing lipids have been determined and it has
been shown that in the triacylglycerols and phosphatidylethanolamines the sn-2 position is esterified mainly by linoleic acid.
Institute of Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii,
No. 6, pp. 625–627, November–December, 1992. 相似文献
7.
The dynamics of the accumulation of water-soluble polysaccharides and pectin substances of Aconitum zaravschanicum Steinb
over the vegetation periods have been studied. The maximum amounts of polysaccharides have been established and their comparative
physicohemical characteristics have been determined.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbekistan Republic, Tashkent. Translated from
Khimiya Prirodnykh Soedinenii, No. 3, pp. 357–359, May–June, 1993. 相似文献
8.
Four fractions of soluble protein have been isolated by the method of successive extraction from the needles ofPinus sylvestris, and their quantitative ratios have been established. The quantitative amino acid compositions of the fractions isolated
and of the unextracted protein, which amounts to about 55% of the total amount of protein in the needles, have been determined.
The amount of crude protein in the initial material was 11% on the absolutely dry needles.
Siberian Technological Institute, Krasnoyarsk. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 676–678, September–October,
1980. 相似文献
9.
The lipid compositions of the seeds and the flesh of the fruit ofMandragora turcomanica have been investigated. The qualitative identity of the lipid compositions of the two parts of the fruit has been shown and
it has been found that the degrees of saturation of the fatty acids of the triacylglycerides and phospholipids and of the
free fatty acids of the fruit flesh are higher than those of the lipid classes of the seeds.
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. 6, pp. 741–745, November–December 1998. 相似文献
10.
G. Bokias 《Colloid and polymer science》2000,278(11):1109-1113
The interactions of sodium dodecyl sulfate with a positively charged copolymer based on N-isopropylacrylamide (NIPAM) have been investigated in aqueous solution by turbidimetric and viscometric measurements. The
copolymer contains mainly NIPAM and only 5 mol % of the charged comonomer [3-(methacryloylamino)propyl]-dimethyloctylammonium
bromide. The polymer–surfactant complex is insoluble for mixture compositions near to the charge stoichiometry, while it exhibits
lower critical solution temperature behavior for mixtures with an excess of polymer or surfactant. In the case of surfactant
excess, the transition from an expanded coil to a globular state upon heating has been observed by viscometry.
Received: 24 April 2000/Accepted: 30 May 2000 相似文献
11.
The chemical composition of the leaves and roots of the hybrid fodder dock Rumex K-1 (fam. Polygonaceae) introduced into cultivation
in the environs of Almaty has been studied for the first time. It has been shown that the leaves and roots of the plant contain
a considerable amount of such biologically active substances as lipids, vitamins, phenolic compounds, polysaccharides, and
anthraquinones. The fatty acid compositions of the leaf and root lipids are given.
Almaty Pharmaceutical Factory AO (Limited Company), Almaty, fax (3772) 42 96 75. Translated from Khimiya Prirodnykh Soedinenii,
No. 4, pp. 456–458, July–August, 1998. 相似文献
12.
M. R. Mirzaeva R. K. Rakhmanberdyeva É. L. Kristallovich D. A. Rakhimov N. I. Shtonda 《Chemistry of Natural Compounds》1998,34(6):653-655
The water-soluble polysaccharides of the seeds of eight species of Gleditsia have been isolated and studied. They are galactomannans
with different viscosities, specific rotations, and ratios of galactose and mannose. A study of their chemical transformations
and IR spectral data has shown that the monosaccharide residues are pyranoses linked by β-1-4-glycosidic bonds having in the
second componentD-galactose with the α-configuration of the glycosidic center and the most probable chair conformation of the pyranose ring.
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 727–730, November–December, 1998. 相似文献
13.
Ž. Mitić G. S. Nikolić M. Cakić R. Nikolić Lj. Ilić 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(9):1433-1437
Synthesis of stable copper(II) complexes with reduced dextran derivatives can be realized with low molar polysaccharides of
an average molar mass 5000 g mol−1. A copper(II) content of 4–20% is achieved at pH 7–8 and at the boiling point. Copper(II) complex formation with dextran
was analyzed by spectrophotometric VIS methods. The IR spectra of copper(II) complexes with dextran were analyzed to find
the most stable conformation of the glucopyranose unit. The ESR parameters of the spectrum indicate a square-planar coordination
of the Cu(II) ion with four oxygen ligand atoms in the same plane. Copper deficiency causes a number of pathological states
[1]. In both human and veterinary medicine, commercial copper preparations based on dextran and its derivatives are used for
such purposes [2]. According to the literature data, dextran has the ability of complex formation with various biometals (Zn,
Fe, Co, Ca, and Mg) [3–6]. Iron complexes with different polysaccharides have special importance and they have been described
in detail [7]. Synthetic procedures for the complex formation of Cu(II) with polysaccharides, including dextran, are described
in scientific and patent literature [8]. However, literature data on the complex formation possibility of the Cu(II) ion with
dextran derivatives are scarce.
The text was submitted by the authors in English.
An erratum to this article is available at . 相似文献
14.
The lipid compositions of the coats and kernels of the seeds ofNepeta pannonica andLavandula vera have been studied. It has been established that the lipids of the seed coats of the two species of plants differ substantially
in their composition. The lipids of the kernels ofNepeta have been found to contain free fatty acids with chain lengths of from C20 to C35. Ursolic acid and its acetate have been isolated from extracts of the seed coats ofLavandula, and dimethyladipic acid from the seed oil of this species.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh
Soedinenii, No. 5, pp. 614–620, September–October, 1980. 相似文献
15.
M. A. Khodzhaeva Z. A. Khushbaktova N. S. Irismetova 《Chemistry of Natural Compounds》1998,34(6):656-659
Glucofructans have been isolated from the onionAllium suvorovii Rgl., and their qualitative chemical compositions and the nature of the bonds between the fructofuranose residues have been
determined. It has been established that glucofructan-II is a compound with low toxicity and exhibits a pronounced hypolipidemic
activity in relation both to intact animals and to animals with experimental hyperlipidemia and atherosclerosis.
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. 6, pp. 731–735, November–December, 1998. 相似文献
16.
Tatiana A. Zotina Galina S. Kalacheva Alexander Ya. Bolsunovsky 《Journal of Radioanalytical and Nuclear Chemistry》2011,290(2):447-451
Accumulation of americium (241Am) and plutonium (238,242Pu) and their distribution in cell compartments and biochemical components of the biomass of freshwater aquatic plants Elodea canadensis,
Ceratophyllum demersum and Myrioplyllum spicatum and aquatic moss Fontinalis antipyretica have been investigated in laboratory experiments. Americium and plutonium taken up from water by Elodea canadensis apical shoots were mainly absorbed by structural components of plant cells (90% for 241Am; 89% for 238Pu and 82–87% for 242Pu). About 10–18% of isotope activity was recorded in the cytosol fraction. The major concentration (76–92%) of americium
was bound to cell wall cellulose-like polysaccharides of Elodea canadensis, Myriophyllum spicatum, Ceratophyllum demersum and Fontinalis antipyretica, 8–24% of americium activity was registered in the fraction of proteins and carbohydrates, and just a minor concentration
(<1%) in the lipid fraction. The distribution of plutonium in the biomass fractions of Elodea was similar to that of americium. Hence, americium and plutonium had the highest affinity to cellulose-like polysaccharides
of cell walls of freshwater submerged macrophytes. 相似文献
17.
E. Matteoli L. Lepori T. R. Usacheva V. A. Sharnin 《Journal of Thermal Analysis and Calorimetry》2009,97(3):811-816
The influence of H2O–EtOH and H2O–Acetone mixed solvents at various compositions on the thermodynamics of complex formation reaction between crown ether 18-crown-6
(18C6) and glycine (Gly) was studied. The standard thermodynamic parameters of the complex [Gly18C6] (log K°, Δr
H°, Δr
S°) were calculated from thermochemical data at 298.15 K obtained by titration calorimetry. The complex stability and its formation
enthalpy increase with increasing the non aqueous component concentration in both mixed solvents. The thermodynamic data were
discussed on the basis of the solvation thermodynamic approach and the solvation contributions of the reagents and of the
complex to the complex stability were analyzed. 相似文献
18.
The coordination complex of Cu (II) with the Schiff base derived from 4-chloroaniline with salicylaldehyde have been synthesized
and characterized by micro analytical data; FT–IR, UV–Vis, FAB-mass and thermal analysis studies. Thermal data show degradation
of complexes. We carried out thermal analysis at three different heating rates viz. 5, 10 and 20 °C per min. The activation
thermodynamic parameters, such as activation energy (E*), entropy of activation (ΔS*), enthalpy of activation (ΔH*) and Gibbs free energy (ΔG*) have been calculated with the help of TG, DTA and DTG curves using Coats–Redfern method. The stoichiometry of the complexes
are in 1:2 (M:L) molar ratio. Synthesized complex has been tested for their reactivity and substitution behaviour. 相似文献
19.
Water-soluble polysaccharides, pectin substances, and hemicelluloses have been isolated fromMorus leaves, and their qualitative and quantitative compositions have been determined. The polysaccharides obtained by extraction with hot water have been investigated for hypoglycemic activity. A polysaccharide fromMorus alba proved to have the highest sugar-lowering activity.Materials presented at the IInd International Symposium of the Chemistry of Natural Compounds.Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 789–791, November–December, 1997. 相似文献
20.
S. D. Gusakova T. V. Khomova L. G. Mezhlum'yan P. Kh. Tuldashev 《Chemistry of Natural Compounds》1994,30(4):434-438
The amounts and the group, class, and fatty-acid compositions of the feebly-and the strongly-bound lipids of the total protein
fraction of cotton seeds that inhibits the growth of the pathogenic fungusVerticillium dahliae Kleb. have been determined. The main differences of the indices for the seeds of healthy and infected plants of two varieties
contrasted by their degrees of susceptibility to verticillium wilt have been established.
Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89
14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 474–480, July–August, 1994. 相似文献