全文获取类型
收费全文 | 165篇 |
免费 | 0篇 |
专业分类
化学 | 146篇 |
晶体学 | 1篇 |
力学 | 4篇 |
数学 | 2篇 |
物理学 | 12篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 9篇 |
2018年 | 8篇 |
2017年 | 5篇 |
2016年 | 6篇 |
2015年 | 1篇 |
2014年 | 7篇 |
2013年 | 2篇 |
2012年 | 7篇 |
2011年 | 10篇 |
2010年 | 5篇 |
2009年 | 9篇 |
2008年 | 7篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 6篇 |
2004年 | 5篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 9篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1966年 | 1篇 |
1964年 | 1篇 |
1961年 | 3篇 |
1960年 | 2篇 |
排序方式: 共有165条查询结果,搜索用时 15 毫秒
61.
E. V. Nosova G. N. Lipunova A. A. Laeva V. N. Charushin 《Russian Chemical Bulletin》2005,54(3):733-737
Reactions of 2-benzoylmethylbenzimidazole with tetra- and pentafluorobenzoyl chlorides afford fluorine-containing 6-benzoyl-7H-benzimidazo[3,2-a]quinolones. 2-Cyanomethyl- or 2-benzoylmethylbenzimidazole reacts with tetra(penta) fluorobenzoyl isothiocyanates to give fluorine containing 1,3-benzothiazinones, which differently behave in reactions with cycloalkylimines.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 720–724, March, 2005. 相似文献
62.
R. K. Alekperov V. P. Leshchinskaya V. S. Nosova I. I. Chervin R. G. Kostyanovskii 《Chemistry of Heterocyclic Compounds》1987,23(7):749-751
The barriers to amide rotation about the N-N bond in 1-nitrosoazetidine, dimethylnitrosamine, 1-formylazetidine, 1,1-carbonylbisazetidine, 1-dimethylcarbamoylazetidine, and dimethylformamide were measured by dynamic NMR spectroscopy. 1,1-Carbonylbisazetidine and 1-dimethylcarbamoylazetidine, the structures of which were confirmed by data from the PMR and 13C NMR spectra, were obtained.Translated from Khimiya Geterotsiklicheskikh Soedenenii, No. 7, pp. 912–194, July, 1987. 相似文献
63.
A. N. Yankin N. V. Nosova M. V. Dmitriev V. L. Gein 《Russian Journal of Organic Chemistry》2016,52(2):206-208
Reaction of acetoacetic acid N-arylamides with ninhydrin at boiling in ethanol in the presence of iron(III) chloride afforded 1-aryl-3a,8b-dihydroxy-3-(1-hydroxyethylidene)-1,3,3а,8b-tetrahydroindeno[1,2-b]-pyrrole-2,4-diones. The structure of compounds was confirmed by IR, 1Н NMR, and mass spectra and X-ray diffraction (XRD) analysis. 相似文献
64.
G. N. Lipunova E. V. Nosova A. A. Laeva T. V. Trashakhova P. A. Slepukhin V. N. Charushin 《Russian Journal of Organic Chemistry》2008,44(5):741-749
Proceeding from (tetrafluorobenzoyl)thioureas fluorine-containing derivatives were synthesized of 1-aryl-2-ethylthioquinazolin-4-one, [1,3]benzothiazin-4-one, and also of thiazolidine and 1H-1,2,4-triazole. 相似文献
65.
The linear stability of a combined convective flow in a side-heated plane vertical layer of incompressible fluid is considered. The layer contains uniformly distributed heat sources. The steadystate flow is a superposition of the Gershuni convective flow and a flow induced by the action of the internal heat sources. The stability maps of the combined flow are constructed for different values of the Prandtl number. It is found that the internal sources damp the action of the mechanisms of the Gershuni flow crisis. The lateral heating may result in both the stabilization and the destabilization of the flow caused by the action of internal heat sources. 相似文献
66.
Gein V. L. Yankin A. N. Nosova N. V. Levandovskaya E. B. Novikova V. V. Rudakova I. P. 《Russian Journal of General Chemistry》2019,89(6):1169-1176
Russian Journal of General Chemistry - Novel 4,5,6,7-tetrahydro-2H-indazole derivatives were obtained via the reaction of N1,N3,2-triaryl-6-hydroxy-6-methyl-4-oxocyclohexane-1,3-dicarboxamides with... 相似文献
67.
A. G. Afonin V. G. Butov S. V. Sinyaev V. A. Solonenko G. A. Shvetsov S. V. Stankevich G. V. Nosov M. G. Nosova 《Journal of Applied Mechanics and Technical Physics》2018,59(5):862-866
Numerical study has been performed to investigate the operating characteristics and modes of an energy storage device based on a pulsed magnetohydrodynamic generator and a step-up transformer with a stored energy of 25 and 50 MJ and a secondary winding current of 250 kA at the final stage of operation. The operating parameters of such storage devices with rail launchers operating in the mode of rapid-fire launching of several projectiles were calculated. 相似文献
68.
G.?I.?Nosova A.?V.?Shalimova R.?V.?Sundeev A.?M.?GlezerEmail author M.?N.?Pankova A.?V.?Shelyakov 《Crystallography Reports》2009,54(6):1058-1065
The features of structural and phase transitions during severe plastic deformation (in Bridgman anvils) of the amorphous Ti50Ni25Cu25 alloy have been studied by X-ray diffraction and transmission electron microscopy. Application of successively increasing
deformation has revealed three cycles of successive phase transitions from amorphous to crystalline state and vice versa.
The results obtained are explained in terms of the superposition of the different channels of elastic energy dissipation,
which are activated during severe plastic deformation. 相似文献
69.
Nosova E. V. Kopotilova A. E. Ivan’kina M. A. Moshkina T. N. Kopchuk D. S. 《Russian Chemical Bulletin》2022,71(7):1483-1487
Russian Chemical Bulletin - A series of [1,2,4]triazolo[4,3-c]quinazolines, bearing 3-positioned p-bromophenyl or 5-bromothiophen-2-yl fragment, was synthesized by oxidative cyclization of the... 相似文献
70.
Lipunova G. N. Nosova E. V. Mokrushina G. A. Ogloblina E. G. Aleksandrov G. G. Charushin V. N. 《Russian Journal of Organic Chemistry》2003,39(2):248-256
The heating of derivatives of benzimidazole-2-thione and imidazolidine-2-thione with tetra(penta)fluorobenzoyl chlorides in toluene or pyridine gave rise to fluorocontaining derivatives of imidazo[2,1-b][1,3]benzothiazine. The latter were studied in reactions of nucleophilic substitution of fluorine for amino groups. 相似文献