Výsledky vyhledávání - "V. A. Kalyazin"

Determination of Lignin Content in Plant Materials Using Solid-State 13C NMR Spectroscopy

Autor: L. Ya. Labzina, D. Kh. Alalvan, V. A. Kalyazin, V. S. Tezikova, S. G. Kostryukov, Yu. Yu. Masterova, P. S. Petrov, N. A. Khluchina

Publikováno v: Polymer Science, Series B. 63:544-552

The article shows the possibilities of solid-state (СP MAS) 13С NMR spectroscopy for determination of lignin content in a wide range of lignocellulosic materials: wood of various tree species and plant waste. The analysis is based on the use of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::018a49fbbb2fcba082b579e5e24f62dc
https://doi.org/10.1134/s1560090421050067

Zobrazit plný text záznamu

Synthesis and Aromatization of Ethyl Esters of cis-4-(Methanesulfonyl)-cis-5-arylprolines. Unusual Synthesis of 5-Aryl-2-acetylpyrrole

Autor: V. A. Kalyazin, P. S. Petrov, Nikolay V. Somov

Publikováno v: Russian Journal of Organic Chemistry. 57:170-179

1-Bromovinyl and vinyl methyl sulfones undergo 1,3-dipolar cycloaddition reactions with azomethinylides generated in situ from ethyl N-benzylideneglycinates under the action of silver acetate and triethylamine (toluene, 20°C, 48 h) to form ethyl est

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a20f8a739dfbc89476ff332cdb3b8f95
https://doi.org/10.1134/s1070428021020068

Zobrazit plný text záznamu

Plný text ve formátu HTML

Features of Changes in the Surface Geometry of Discharge-Chamber Walls during the Prolonged Operation of a Stationary Plasma Thruster

Autor: R. Yu. Gnizdor, S. Yu. Pridannikov, Vladimir Kim, V. G. Kalyazin, D. V. Merkur’ev, V. S. Zakharchenko

Publikováno v: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. 14:1221-1227

We consider the dynamics of local inhomogeneities caused by erosion of the surface of the discharge-chamber walls of a stationary plasma thruster during its prolonged operation. The inhomogeneities lead to the appearance of “longitudinal” (along

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bab749a922b99e60b5ba2941818d7f8f
https://doi.org/10.1134/s1027451020060087

Zobrazit plný text záznamu

Hydrolysis of Hydroxypropyl Methylcellulose by Trifluoromethanesulfonic Acid and Subsequent Determination of Chemical Structure by 13C NMR Spectroscopy

Autor: A. A. Odnopolov, V. S. Tezikova, V. A. Kalyazin, A. A. Burtasov, E. V. Krainov, S. G. Kostryukov, P. S. Petrov, M. K. Pryanichnikova

Publikováno v: Polymer Science, Series B. 62:279-289

The hydrolysis of three hydroxypropyl methylcellulose samples with varying degrees of polymerization by aqueous solutions of trifluoromethanesulfonic acid with a concentration of 1, 2, 3, and 4% at a temperature of 80, 90, 100, and 110°C in a microw

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dbee81f4888268f0433f919bea999ad5
https://doi.org/10.1134/s1560090420030082

Zobrazit plný text záznamu

Reaction of Methyl Vinyl Sulfone with Schiff Bases Derived from α-Alanine Methyl Ester and Aromatic Aldehydes

Autor: V. A. Kalyazin, V. A. Vasin, Nikolay V. Somov, P. S. Petrov

Publikováno v: Russian Journal of Organic Chemistry. 55:426-435

Schiff bases derived from α-alanine methyl ester and aromatic aldehydes reacted with methyl vinyl sulfone in toluene at 20°C in the presence of silver acetate and 1.5 equiv of triethylamine to give the corresponding 1,3-dipolar cycloaddition produc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb23377cd382d08d7e372a987bc4eed4
https://doi.org/10.1134/s107042801904002x

Zobrazit plný text záznamu

Study of the low-power krypton-operated stationary plasma thruster plume

Autor: V. G. Kalyazin, D. V. Merkurev, Vladimir Kim, V. S. Zakharchenko, E. A. Shilov

Publikováno v: IOP Conference Series: Materials Science and Engineering. 927:012053

The paper presents the results of experimental studies of the plume of low power stationary plasma thruster SPT-40 model, operating with krypton at discharge power of about 250 W, and with xenon at discharge power of about 200 W. A comparative analys

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce37eeaccec30b561bfacf1f7388f14a
https://doi.org/10.1088/1757-899x/927/1/012053

Zobrazit plný text záznamu

Products and mechanism of some halogenation reactions of 1-sulfonyl-substituted tricyclo[4.1.0.02,7]heptanes

Autor: V. V. Razin, V. A. Kalyazin, V. A. Vasin, P. S. Petrov

Publikováno v: Russian Journal of Organic Chemistry. 48:358-367

Reactions of 1-methylsulfonyl- and 1-phenylsulfonyltricyclo[4.1.0.02,7]heptanes with iodine, dioxane dibromide, and dichloro-λ3-iodanylbenzene (under irradiation) gave products of stereoselective syn addition of halogen at the C1–C7 central bicycl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2d4313270fe5e11a8b28ba544e9e6ed7
https://doi.org/10.1134/s1070428012030049

Zobrazit plný text záznamu

Chemo-, regio-, and stereoselectivity in acid-catalyzed hydromethoxylation of tricyclo[4.1.0.02,7]hept-1-yl and 7-methyltricyclo[4.1.0.02,7]hept-1-yl phenyl sulfones

Autor: V. V. Razin, V. A. Vasin, P. S. Petrov, V. A. Kalyazin

Publikováno v: Russian Journal of Organic Chemistry. 46:812-819

Hydromethoxylation of tricyclo[4.1.0.02,7]hept-1-yl and 7-methyltricyclo[4.1.0.02,7]hept-1-yl phenyl sulfones with methanol at 20°C in the presence of a catalytic amount of perchloric acid is initiated by the endo attack of proton at the C1 atom, an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84c1fef53b17a516e0a153464b311dc5
https://doi.org/10.1134/s1070428010060072

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání