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Karine A. Eliazyan Aram M. Knyazyan Vergush A. Pivazyan Emma A. Ghazaryan Siranush V. Harutyunyan Aleksandr P. Yengoyan 《Journal of heterocyclic chemistry》2013,50(5):1083-1088
By interaction of N‐methyl(ethyl)‐dithiocarbamate sodium salt with 3‐chloro‐pentane‐2,4‐dion the 1‐(3‐alkyl‐4‐methyl‐2‐thioxo‐2,3‐dihydro‐thiazol‐5‐yl)‐ethanones 1 , 2 and corresponding oximes 7 , 8 were synthesized. On the basis of the mentioned compounds hydrazono ( 3 , 4 ), ureayl and thioureayl ( 5 , 6 ) derivatives, substituted oximes ( 9 , 10 ) and azinyl oximes ( 11 , 12 ) were obtained. The structures of synthesized compounds were confirmed by proton nuclear magnetic resonance spectroscopy and elemental analysis. The pesticidal activities of synthesized compounds were studied. Some of the synthesized compounds simultaneously have shown growth stimulant and fungicidal activity. 相似文献
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Several modem methods of nanowires fabrication and their characterization are presented and discussed. Electronic and thermal transport measurement techniques ofnanowire arrays as well as of an individual nanowire in the wide temperature range are presented. 相似文献
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V. A. Harutyunyan E. M. Kazaryan H. A. Sarkisyan 《Journal of Contemporary Physics (Armenian Academy of Sciences)》2011,46(6):285-292
On the example of InSb we consider the influence of a strong homogeneous electrostatic field on the state of carriers in a
narrow-band quantized cylindrical layer in the case of Kaine dispersion law. Explicit expressions for the energy spectrum
and wave function envelopes of charge carriers in the heterolayer are obtained. It is shown that under action of the strong
external field the rotational motion, with respect to angular variables, of charge carriers becomes oscillatory in a narrow
cone of the azimuth angle. We have obtained corresponding selection rules and calculated the threshold frequencies of absorption
for interband and intraband electro-optical transitions in the layer. The threshold frequencies are determined by the geometric
sizes of the sample and the magnitude of the external field. 相似文献
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A. A. Harutyunyan 《Russian Journal of Organic Chemistry》2016,52(7):1012-1017
The reactions of benzene-1,2-diamine with 5-substituted 2-(alkylsulfanyl)-4-methylpyrimidin-6(1H)-ones and 2-(propylsulfanyl)- and 5-iodo-2-(propylsulfanyl)-3,4-dihydroquinazolines at 175–185°C under solvent-free conditions unexpectedly afforded benzo[4,5]imidazo[1,2-a]pyrimidine, benzo[4,5]imidazo[2,1-b]-quinazoline, and 2,2′-(benzene-1,2-diyldiimino)bis[pyrimidin-4(3H)-ones]. The described reaction is the first example of synthesis of these heterocyclic systems by fusion of benzimidazole to pyrimidine or quinazoline and is likely to follow ANRORC mechanism. 相似文献
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S. R. Harutyunyan 《Journal of Contemporary Physics (Armenian Academy of Sciences)》2018,53(3):252-256
Experimental results that demonstrate the electric power generation by using thermoelectric generator on CeB6 crystal at temperatures below 10 K are presented. The dependence of output power, electric current and efficiency of the generator at various external heating power, loads and ambient temperature are studied. The features of the obtained current-voltage characteristics of the superconductor, fed by the electric current of thermoelectric generator are discussed. 相似文献
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H. S. Harutyunyan V. K. Ohanyan 《Journal of Contemporary Mathematical Analysis (Armenian Academy of Sciences)》2014,49(3):139-156
In the paper the orientation dependent chord length distribution functions for some bounded convex domains are obtained. In particular, formulae for the orientation dependent chord length distributions for a regular polygon and an ellipse are obtained. Explicit forms of the orientation dependent chord length distributions were known only in the cases of a disc and a triangle. We also obtain the cross-section area distribution functions for an ellipsoid and a cylinder. The cross-section area distribution function was known only in the case of a ball. 相似文献
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Neumann‐Lara (1985) and ?krekovski conjectured that every planar digraph with digirth at least three is 2‐colorable, meaning that the vertices can be 2‐colored without creating any monochromatic directed cycles. We prove a relaxed version of this conjecture: every planar digraph of digirth at least five is 2‐colorable. The result also holds in the setting of list colorings. 相似文献
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