The coumarin composition ofSeseli tortuosum

The results are given of the identification of the known pyranocoumarin campestrinol (I), and the structures of four new coumarin derivatives have been studied — tortuosin (II), tortuosinin (III), tortuosinol (IV), and tortuosidin (V). On the basis of their spectral characteristics and chemical transformations, the corresponding structures have been established for compounds (II)-(V).Leningrad Sanitary-Hygienic Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 704–709, November–December, 1983.     

Effect of the surface of the support on transformations of chromium ions in the Cr/SiO2 system

The ESR and EDRS methods were used to study the effect of adsorption of water and oxygen molecules at room temperature on the valence transformations and coordination transformations of Cr(III) and Cr(V) ions in a tetrahedral ligand environment and Cr(V) ions in square-pyramid coordination, ions that were formed on the surface of SiO₂ after vacuum heat treatment of CrO₃/SiO₂ samples at 1173 K.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 28, No. 4, pp. 372–377, July–August, 1992.     

Lipids of mulberry leaves and of mulberry silkworm excreta

The composition and the amounts of various groups of liposoluble compounds in mulberry leaves and the excreta of the silkworm have been established by chromatographic and chemical methods. It has been shown that biologically valuable components — phytosterols, unsaturated fatty acids, phytol, carotenoids, and chlorophylls — are concentrated in silkworm excreta.A. V. Bogatskii Physicochemical Institute of the UkrSSR Academy of Sciences, Odessa. Moscow Institute of Fine Chemical Technology. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 505–509, July–August, 1987.     

A mass-spectrometric study of insect pheromones. II. Epoxy compounds

The mass spectra of epoxy compounds have been studied and the positions of the epoxy rings and their configurations have been shown.V. I. Lenin Tashkent State University. A. S. Sadykov Institute of Bioorganic Chemistry, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 130–135, January–February, 1992.     

Oxidation of hexadec-11Z-en-1-ol by Cr(VI) reagents on polymeric supports

A method is proposed for the oxidation of hexadec-11Z-en-1-ol to hexadec-11Z-enal by Cr(VI) reagents on polymeric supports.A. S. Sadykov Institute of Bioorganic Chemistry, Uzbek Academy of Sciences, Tashkent. V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 252–255, March–April, 1990.     

Investigation of the structures formed when vanadium and phosphorus are grafted on to a silica surface

V-P/Si0₂ samples obtained by impregnation and grafting with different contents of vanadium and phosphorus have been studied by ESR, scanning electron microscopy (SEM) and fine-structure x-ray absorption (FSXA). It is shown that, independent of the method of synthesis, the vanadium concentration and the P/V ratio, the surface region of the carrier consists of a crystalline - VOPO₄ phase with a low concentration of V⁴⁺ ions.L. V. Pisarzhevskii Institute of Physical Chemistry of the Ukrainian SSR Academy of Sciences, Kiev. Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 27, No. 3, pp. 370–375, May–June, 1991. Original article submitted February 20, 1991.     

Lipids of the leaf vegetables Spinacea oleracea,Latuca sativa,and Rumex acetosa

The class compositions of the lipids of leaf vegetables —Spinacea oleracea (variety Ispolinskii),Latuca sativa (variety Kucheryavets Odesskii), andRumex acetosa (variety Odesskii-17) have been studied. The compositions of their NLs (17 groups of individual compounds were identified), GLs (nine groups of compounds were found), and PhLs (seven groups of compounds have been found) have been determined by physicochemical methods of analysis. The maximum amount of the total lipids and also of the PhLs was possessed by the spinach. Among the FAs of the leaf vegetables, USFAs predominated.M. V. Lomonosov Technological Institute of the Food Industry, Odessa. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 199–205, March–April, 1993.     

Photoinduced structure transformations in dichromate-impregnated denatured collagen

X-ray structure analysis shows that irradiating gelatin films containing chromates causes a spiral-coil transition in the denatured collagen molecules. The concentration and type of the chromate have substantial effects, as do the film preparation conditions. The x-ray diffraction and ESR data indicate that chromium(V) compounds formed by photoreduction from chromium(VI) ones are mainly responsible for the conformation transition. In the absence of chromium compounds, light absorbed by the gelatin macromolecules results in macroradicals on account of the photolysis in the denatured protein chains. There is no phase transition.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 24, No, 2, pp. 247–251, March–April 1988.     

Synthesis of phosphorylated carbamoyluracils

A series of previously unknown phosphorylated carbamoyluracils have been synthesized by the interaction of aliphatic and aromatic isocyanates of phosphorus(III) and phosphorus (V) acids with uracil. The structures of these compounds have been confirmed by IR and¹H NMR spectroscopy.Institute of Pharmacology and Toxicology, Ukraine Academy of Medical Sciences, Kiev 252057. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 980–985, July, 1995. Original article submitted May 23, 1995.     

Lipids of the fruit of Citrus unshiu

The compositions and the amounts of various groups of liposoluble compounds in the component elements of the fruits ofCitrus unshiu Marc. [satsuna variety of mandarin orange] — the flavedo, the albedo, the membrane, and the flesh — have been determined by chromatographic and chemical methods. About 30 groups of lipid compounds belonging to the classes of neutral lipids and glyco- and phospholipids have been identified and characterized. The fatty-acid compositions of the main classes of lipids have been studied. About 30 different carotenoids have been determined in the various elements of the satsuma orange.M. V. Lomonosov Odessa Technological Institute of the Food Industry. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 342–348, May–June, 1989.     

Isolation and purification of biopolymers by affinity chromatography. VI. Preparation and properties of an affinity adsorbent with a polysaccharide spacer for the purification of proteolytic enzymes

A new affinity sorbent has been synthesized — soybean trypsin inhibitor (STI)-amylopectin-hydrazidosuccinyl-Sepharose — and its properties have been studied in comparison with those of an analogous adsorbent without the spacer STI-Sepharose. The STI-amylopectin-hydrazidosuccinyl-Sepharose adsorbent has been used for the purification of trypsin from porcine pancreas and of callicrein from human blood plasma.For Communication V, see [1].Institute of Biological and Medicinal Chemistry, Academy of Medical Sciences of the USSR, Moscow. I. M. Sechenov First Moscow Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 556–560, July–August, 1980.     

Study and isolation of vanadylporphyrins from the petroleum oils of the Buzachi peninsula

Summary 1. The vanadylporphyrin complexes of the petroleum oils of the Buzachi peninsula have been studied by the ESR method and spectrophotometrically. The results of the investigation show that the ESR method is the most convenient for determining small amounts of vanadylporphyrins in petroleum oils and extracts.2. The selectivity of various solvents in the extraction of vanadylporphyrin complexes from petroleum oils, as determined by the ESR method, is discussed.Institute of the Chemistry of Petroleum and Natural Salts, Academy of Sciences of the Kazakh SSR, Gur'ev. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 389–392, May–June, 1978.     

ESR spectrum of the oxidized vanadylporphyrin complex of Karazhanbass petroleum

As a result of the use of various oxidants, mono- and bications of the natural vanadylporphyrins of Karazhanbass petroleum have been obtained, and their ESR spectra have been studied.Institute of the Chemistry of Petroleum and Natural Salts of the Kazakh SSR Academy of Sciences, Gur'ev. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 190–193, March–April, 1990.     

Synthesis and spectral properties of coumaronyl-substituted benzo[f]quinolines

Condensation of arylidene-2-naphthylamines with 2-acetylbenzofuran (2-acetylcoumarone) was used for the first time to synthesize 1-(2-coumaronyl)-3-arylbenzol[f]quinolines containing two different heteroatoms — N and O — in the molecule. The IR, UV, ESR and mass spectra of the compounds obtained were studied.Institute of Organophysical Chemistry, Belorussian Academy of Sciences, Minsk 220072. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 960–964, July, 1996. Original article submitted April 18, 1996.     

Phospholipases a of the venom of the Central Asian cobra

Conclusions Two phospholipases A with molecular weights of 11,000±1000 and 18,000±1000, consisting of individual compounds according to rechromatography and disk electrophoresis, have been isolated by filtration through Sephadex G-75 gel and by ion-exchange chromatography on CM-cellulose from the venom of the Central Asian cobra.V. I. Lenin Tashkent Order of the Red Banner of Labor State University. Institute of Biochemistry of the Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 387–389, May–June, 1974.     

Lipids of the fruit of Pyrus communis

The compositions of the various groups of liposoluble compounds in the peel and flesh of the fruitPyrus communis of the varieties Williams and Bere Ardanpon have been established and their amounts have been determined by chromatographic and chemical methods. The qualitative compositions have been shown to be identical and characteristic quantitative differences have been found in the lipids of individual elements of these pairs. The fatty acid compositions of the lipids have been studied.M. V. Lomonosov Technological Institute of the Food Industry, Odessa, Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 175–180, March–April, 1989.     

Cation-radicals in the electrochemical oxidation of 1,2,6-trimethyl-3,5-diacetyl-1,2-dihydropyridines

The ESR spectra of the cation-radicals of 4-substituted 3,5-diacetyl-1,2,6-trimethyl-1,2-dihydropyridines were generated electrochemically by oxidation in acetonitrile at –40°C. The unpaired electron distribution in the cation-radicals was established by analysis of the hyperfine structure of the ESR spectra. It was found that the size of the electrochemical oxidation potential of the compounds and the unpaired electron distribution in the cation-radical were subject to the inductive effect of the substituents in positions 3 and 5 of the heterocycle.Latvian Institute of Organic Synthesis, Riga LV-1006. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 772–775, June, 1997.     

Complexes of copper with 14–18-membered macrocyclic tetraaza ligands and their participation in oscillating chemical reactions

A number of copper complexes have been synthesized with 14–18-membered tetraaza macrocyclic ligands having six methyl groups and two double bonds located in the cis position relative to the metal ion. These compounds have been investigated by means of ESR spectrometry and electronic and IR spectroscopy. It has been shown that the size of the macroring does not have any great influence on the magnitudes of the spectral parameters. It has been found that these copper complexes can be oxidized by potassium bromate in an oscillatory regime.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 22, No. 1, pp. 59–64, January–February, 1986.     

Lipids of the fruit of Diospyros kaki

The composition and amounts of the various groups of liposoluble compounds in the rind and flesh of persimmon fruit of the varieties Hachiya and Hyakume have been established by a combination of chromatographic and chemical methods. The identity of the qualitative composition of the lipids of the flesh and rind of the fruit and quantitative differences in the amounts of individual groups have been found. A total of 24 groups of compounds were identified, the main ones of which were monogalactosyldiglycerides, carotenoids, diacylglycerols, ceramide oligosides, digalactosyldiglycerides, phosphatidylglycerols; phosphatidylcholines, and free and glycosylated sterols. In the fatty acid composition of the lipids unsaturated fatty acids — linolenic, oleic, linoleic, and palmitoleic — predominated (>70%).M. V. Lomonosov Odessa Technological Institute of the Food Industry. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 501–505, July–August, 1987.