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Chelnokov A. A. Roshchina L. V. Gladchenko D. A. Pivovarova E. A. Piskunov I. V. Gorodnichev R. M. 《Human physiology》2022,48(2):121-133
Human Physiology - The effect of 20-minute transcutaneous electrical spinal cord stimulation (tESCS) on the severity of nonreciprocal and recurrent inhibition of spinal α-motoneurons in humans... 相似文献
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Aryna V. Lado Alexander V. Piskunov Georgy K. Fukin Vladimir N. Ikorskii Vladimir K. Cherkasov 《Inorganica chimica acta》2005,358(15):4443-4450
Addition of 3,6-di-tert-butyl-o-benzoquinone (3,6-DBBQ) to SnCl2 in THF leads to the oxidation of Sn(II) to Sn(IV) with formation of catecholate complex (3,6-DBCat)SnCl2 · 2THF (1), where 3,6-DBCat is 3,6-di-tert-butyl-catecholate dianion. The reaction of 4,6-di-tert-butyl-N-(2,6-di-iso-propylphenyl)-o-iminobenzoquinone (IBQ-Pri) also proceeds on the oxidative-addition mechanism yielding bis-iminosemiquinonato species (ISQ-Pri)2SnCl2(2), where ISQ-Pri is anion-radical 4,6-di-tert-butyl-N-(2,6-di-iso-propylphenyl)-o-iminobenzosemiquinolate. The complexes have been characterized by IR, X-band EPR, 1H NMR (for 1) spectroscopy and magnetochemistry (for 2). X-ray analysis data show the distorted octahedral environment of tin(IV) for both complexes. Complex 1 is diamagnetic (ground state S = 0), while 2 has triplet ground state (S = 1, biradical). Catecholate complex 1 is able to be a spin trap for different organic radicals. 相似文献
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A. S. Levchenko V. S. Piskunov N. A. Konoplya O. Y. Bushueva A. A. Raspopov O. Y. Mezentseva A. V. Polonikov 《Russian Journal of Genetics》2018,54(8):910-918
Chronic rhinosinusitis (CRS) is a syndrome associated with persistent inflammation of the mucous membranes of the nose and paranasal sinuses. There are two forms of CRS: chronic rhinosinusitis with nasal polyposis (CRSwNP) and chronic rhinosinusitis without nasal polyposis (NP) (CRSsNP). Available data indicate that innate immunity, adaptive immunity, tissue remodeling, and influence of microorganisms can play a modified role in the development of CRSwNP. The genetic predisposition to the development of CRS is also possible. Today there are several groups of genes which influence the development of chronic rhinosinusitis. They include the genes associated with CFTR locus, HLA genes, genes of innate immunity, genes involved in the development of TH2-inflammatory reactions, genes responsible for tissue remodeling of paranasal sinuses, genes involved in the metabolism of arachidonic acid, genes of xenobiotic transformation, and other pro-inflammatory genes. Identification of genetic susceptibility to CRS would make it possible to develop personalized approaches for prevention, tactics, and effective treatment of chronic rhinosinusitis. 相似文献
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Three new species of gelechiid moths (Gelechiidae) are described from the arid regions of the southeastern European part of Russia (Astrakhan and Orenburg provinces): Bryotropha satschkovisp. n., Monochroa aenigmasp. n., and Scrobipalpa achtubicasp. n.
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Human Physiology - According to the data of kinematics and electrical activity of muscles in a state of fatigue when running in a straight line and in a bend there was studied the coordination... 相似文献
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T A Lozinova E S Vishnevski? A E Arutiunian M A Piskunov O N Brzhevskaia 《Biofizika》1987,32(3):520-521
It was shown that ATP synthesis by F1-ATPase sensitized by visible light was combined with oxidation of SH groups and decrease of initial flavin fluorescence in the F1-ATPase preparation. It was suggested that it was an endogenous flavin group that regulated redox transitions between SH-S-S groups which was essential for the catalysis in vivo. 相似文献
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To study the effect of chelation of iron ions by quinones on the generation of OH radicals in biological redox systems, we have synthesized quinones that can form complexes with Fe(III) ions: 2-phenyl-4-(butylamino)naphtho[2,3-h]quinoline-7,12-dione (Qbc) and 2-phenyl-4-(octylamino)naphtho[2,3-h]quinoline-7,12-dione (Qoc). A quinone with a similar structure without chelating group was synthesized as a control sample: 2-phenyl-5-nitronaphtho[2,3-g]indole-6,11-dione (Qn). Using optical spectroscopy, we determined the stability constant of Qbc with Fe(III) [Ks = (7 +/- 1) x 10(18) M-3] and the stoichiometry of the complex Fe(Qbc)3 in chloroform solutions. One-electron reduction potentials of Qbc, Qn, and adriamycin in dimethyl sulfoxide were measured by cyclic voltammetry. In the presence of Fe(III) the one-electron reduction potentials shifted toward positive values by 0.16 and 0.1 V for Qbc and adriamycin, respectively. Using the spin trap 5,5'-dimethyl-1-pyroline N-oxide (DMPO) and EPR, it was found that Qbc in the Fe(III) complex stimulated the formation of OH radicals in the enzymatic system consisting of NADPH and NADPH-cytochrome P-450 reductase more efficiently than adriamycin and quinone Qn. This is indicated by the absence of a lag period in the spin adduct appearance for Qbc and by a significantly higher rate of the spin adduct production, as well as by a larger absolute concentration of the spin adduct obtained for Qbc in comparison with Qn in the presence of Fe(III).(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献