Thermodynamic description of sorption processes in swelling systems

The thermodynamics of sorptive moistening of various types of swelling sorbents have been analyzed. The energy and entropy characteristics of the sorbed substance have been calculated.Institute of Physical Chemistry, Russian Academy of Sciences, Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 29–33, January, 1992.     

Synthesis and crystal structure of 4-acetoxy-5,6-dihydro-5,5-dinitro-2H-1,3-oxazineN-oxide

A novel heterocyclic compound, 4-acetoxy-5,6-dihydro-5,5-dinitro-2H-1,3-oxazineN-oxide, has been synthesized by the reaction of the dipotassium salt of 1,1,5,5-tetranitro-3-oxapentane with aqueous acetic acid. The synthesized compound has been studied by X-ray diffraction analysis.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2207–2210, December, 1994.We would like to thank G. V. Lagodzinskaya (Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences) for recording and interpreting¹H NMR spectra, A. M. Korolev (Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences) for helpful discussion, and V. I. Fetisov (Institute of Physiologically Active Compounds, Russian Academy of Sciences) for performing quantum-chemical calculations by the AM1 SCF MO LCAO method.     

Biochemical characterization of the vital activity ofYersinia pseudotuberculosis in a culture medium as a function of the temperature of cultivation

A biochemical evaluation of the accumulation of amino acids and organic acids in the culture medium during the cultivation of Yersinia pseudotuberculosis str. 2781 as a function of the temperature has been made by methods of quantitative chromatographic analysis. A considerable decrease in the biosynthesis of the products of vital activity under investigation at 37°C as compared with the cultivation of the same microorganism at 6°C has been found. This permits the assumption that the temperature of cultivation of Y. pseudotuberculosis is a factor regulating the biosynthesis of the amino acids and metabolites of the Krebs cycle necessary for its vital activity.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok. Scientific-Research Institute of Epidemiology and Microbiology, Russian Academy of Medical Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 439–442 and 446–447, May–June, 1993.     

Crystal structure investigation of ternary molybdates Li3Ba2Ln3(MoO4)3 (Ln=Gd,Tm)

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Physics, Siberian Branch, Russian Academy of Sciences. Buryat Institute of Natural Sciences, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 3, pp. 126–130, May–June, 1992.     

Recyclization of substituted furoxans into 1,2,3-triazol-1-oxide derivatives

The effect of the position and nature of substituents on the recyclization of substituted furoxans has been established.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences (RAN), Moscow 117913, Russia Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences (RAN), Chernogolovka 142432, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 202–209, February, 1999.     

Electrohydraulic effect in water-plant heterodisperse systems I. Compositions of the solid residue and the aqueous phase

The electrohydraulic (EH) treatment of water-plant heterodisperse systems leads to the partial degradation of the main components of the plant materials: lignin, cellulose, and carbohydrates. The presence of p-hydroxyphenyl and guaiacyl structures has been established on the basis of the results of the GLC analysis of the ether-extracted phenolic products of plant materials subjected to EH treatment. It has been shown that part of the carbohydrates passes into the aqueous phase in the form of free monosaccharides: pentoses and hexoses.Institute of Chemistry of Plant Substances of Uzbekistan Academy of Sciences, Tashkent. Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk. Siberian Institute of Terrestrial Magnetism, the Ionosphere, and the Propagation of Radio Waves, Siberian Branch, Russian Academy of Sciences, Irkutsk. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 707–711, November–December, 1992.     

Electrohydraulic effect in heterodisperse water-plant systems. II. Chemical nature of the suspended particles

On the basis of the results of acid hydrolysis, chromatographic analysis of the hydrolysates, and a study of IR spectra, it has been established that the suspended particles liberated under the action of electrohydraulic shocks on heterodisperse water—plant systems consist of small fragments of the lignocarbohydrate complex of the plant tissue.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. FAX (3712) 62 73 48. Division of Wood Chemistry, Irkutsk Institute of Organic Chemistry, Siberian Division of the Russian Academy of Sciences. Institute of Solar and Terrestrial Physics, Siberian Division of the Russian Academy of Sciences, Irkutsk, FAX (395-3) 46 25 57. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 435–439, May–June, 1994.     

Electrohydraulic effect in water-plant heterodisperse systems I. Compositions of the solid residue and the aqueous phase

The electrohydraulic (EH) treatment of water-plant heterodisperse systems leads to the partial degradation of the main components of the plant materials: lignin, cellulose, and carbohydrates. The presence of p-hydroxyphenyl and guaiacyl structures has been established on the basis of the results of the GLC analysis of the ether-extracted phenolic products of plant materials subjected to EH treatment. It has been shown that part of the carbohydrates passes into the aqueous phase in the form of free monosaccharides: pentoses and hexoses. Institute of Chemistry of Plant Substances of Uzbekistan Academy of Sciences, Tashkent. Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk. Siberian Institute of Terrestrial Magnetism, the Ionosphere, and the Propagation of Radio Waves, Siberian Branch, Russian Academy of Sciences, Irkutsk. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 707–711, November–December, 1992.     

Purification of crude cottonseed oil and technical gossypol on a chitin sorbent

It has been shown that the use of chitin (technical), which is a production waste, as adsorbent permits the clarification of black cottonseed oil and the purification of technical gossypol.Institute of the Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. A. N. Nesmeyanov Institute of Organometallic Compounds, Russian Academy of Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 753–758, November–December, 1991.     

Nitromethyl derivatives of 1,3,5-triazine. Synthesis and properties

The destructive nitration of 2,4,6-tris[di(carboxy)methylene]hexahydro-1,3,5-triazine and its esters has been investigated. A first representative of the nitromethyl derivatives of 1,3,5-triazine, viz. 2,4,6-tris(nitromethyl)-1,3,5-triazine, has been synthesized.Deceased.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117913. Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences, Chernogolovka 142432. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1254–1259, September, 1997.     

Crystal structure of 1,2-bis-(phenylseleno)-1,2-dichlorethene

Vladimir State Pedagogical Institute. Institute for Elementorganic Compounds, Russian Academy of Sciences. Irkutsk Institute for Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 4, pp. 153–154, July–August, 1992.     

Synthesis and study of the biological activity of fragments of salmon calcitonin II

A number of fragments of salmon calcitonin II possessing analgesic activity of the nonopioid type have been synthesized.Institute of High-Molecular-Mass Compounds, Russian Academy of Sciences. Institute of Experimental Medicine, Russian Academy of Medical Sciences, St. Petersburg. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 126–132, January–February, 1993.     

Reactions of 2,4-disubstituted 5-nitro-1,2,3-triazole 1-oxides. 2. Oxidation of 2-substituted 4-amino(alkylamino)-5-nitro-1,2,3-triazole 1-oxides

The oxidation of substituted aminonitrotriazole oxides to the corresponding dinitro derivatives of triazole and azotriazole oxides has been studied. Communication 1, see ref. [1]. N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow, Russia; e-mail: cheminst@mail.psu.ru. Institute of Chemical Physics at Chernogolovka, Russian Academy of Sciences, 124432 Chernogolovka, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1356–1362, October, 1999.     

Synthesis and properties of phosphorus-tungsten heteropolyacid H6P2W21O71

An electromembrane method has been proposed for the synthesis of H₆P₂W₂₁O₇₁, its resistance to heat in the solid state has been studied, and the Hammett acidity functions of concentrated aqueous solutions measured.Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660049. Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 494–497, March, 1992.     

Synthesis and properties of enaminoketohydrazides of the 1,2,3,4-tetrahydroisoquinoline series

It has been established that the reaction of 2,3-dioxopyrrolo[2,1-a]isoquinolines with hydrazine occurs at the lactam carbonyl with fission of the pyrroledione ring and the formation of enaminoketohydrazides, the structure of which was confirmed by x-ray crystallographic and spectral data on these compounds and their derivatives (hydrazones).Institute of Technical Chemistry, Urals Branch, Russian Academy of Sciences, Perm 614000, Russia. N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117913, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1111–1117, August, 1998.     

Zeravshanisine — A new alkaloid from Aconitum zeravschanicum

The new diterpene alkaloid zeravshanisine has been isolated from the epigeal part ofAconitum zeravschanicum Steinb.. Its structure has been established by spectral methods and by x-ray structural analysis as 2-acetyl-13-benzoyl-14-hydroxyhetisine.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Institute of Organometallic Compounds, Russian Academy of Sciences, Moscow. Translated from Khimiya Prirodnykh Soedinenii, Nos. 3,4, pp. 375–382, May–August, 1992.     

Magnetic resonance parameters and structure of substituted stannyloxyphenoxyl radicals: Investigation by means of ESR in the 2-mm band

Institute of Chemical Physics, Russian Academy of Sciences. Institute of Heteroorganic Compounds, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 5, pp. 69–77, September–October, 1992.     

Influence of structural factors on delocalization of spin density in nitroxyl radicals of the imidazoline series

Institute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 6, pp. 42–51, November–December, 1991.     

Allylboration of isatin and 2,3-dioxopyrrolo[2,1-a]isoquinolines

The reaction of triallylboron with isatin and derivatives 2,3-dioxopyrrolo[2,1-a]isoquinolines at room temperature proceeds regiospecifically at the ketone group to give the corresponding homoallyl alcohol. One of these, which contains a lactam and an amide in its structure, was reduced with lithium tetrahydroaluminate to a diamine.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 117913. Institute of Technical Chemistry, Ural Branch, Russian Academy Sciences, Perm' 614000, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 908–915, July, 1998.