全文获取类型
收费全文 | 71篇 |
免费 | 0篇 |
专业分类
化学 | 48篇 |
晶体学 | 5篇 |
力学 | 1篇 |
数学 | 4篇 |
物理学 | 13篇 |
出版年
2021年 | 1篇 |
2019年 | 7篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 1篇 |
2012年 | 3篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 1篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2002年 | 3篇 |
2000年 | 1篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 1篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1969年 | 1篇 |
1968年 | 2篇 |
排序方式: 共有71条查询结果,搜索用时 31 毫秒
1.
Z. R. Khasanova M. Yu. Vozhdaeva N. N. Kabal’nova E. A. Kantor 《Russian Journal of Applied Chemistry》2007,80(7):1105-1110
Products of the reaction of 1,2,4-trimethylbenzene with chlorine dioxide in aqueous solution were studied. A scheme of 1,2,4-trimethylbenzene transformations was suggested. The influence exerted on the number of the reaction products by the ClO2 dosage and time of its contact with the substrate was examined. 相似文献
2.
Rodion V. Panin Nellie R. Khasanova Evgeny V. Antipov Walter Schnelle 《Journal of solid state chemistry》2007,180(5):1566-1574
NaPd3O4, Na2PdO3 and K3Pd2O4 have been prepared by solid-state reaction of Na2O2 or KO2 and PdO in sealed silica tubes. Crystal structures of the synthesized phases were refined by the Rietveld method from X-ray powder diffraction data. NaPd3O4 (space group Pm3¯n, a=5.64979(6) Å, Z=2) is isostructural to NaPt3O4. It consists of NaO8 cubes and PdO4 squares, corner linked into a three-dimensional framework where the planes of neighboring PdO4 squares are perpendicular to each other. Na2PdO3 (space group C2/c, a=5.3857(1) Å, b=9.3297(1) Å, c=10.8136(2) Å, β=99.437(2)°, Z=8) belongs to the Li2RuO3-structure type, being the layered variant of the NaCl structure, where the layers of octahedral interstices filled with Na+ and Pd4+ cations alternate with Na3 layers along the c-axis. Na2PdO3 exhibits a stacking disorder, detected by electron diffraction and Rietveld refinement. K3Pd2O4, prepared for the first time, crystallizes in the orthorhombic space group Cmcm (a=6.1751(6) Å, b=9.1772(12) Å, c=11.3402(12) Å, Z=4). Its structure is composed of planar PdO4 units connected via common edges to form parallel staggered PdO2 strips, where potassium atoms are located between them. Magnetic susceptibility measurements of K3Pd2O4 reveal a Curie-Weiss behavior in the temperature range above 80 K. 相似文献
3.
4.
A.?A.?GaleevEmail author N.?M.?Khasanova C.?Rudowicz G.?S.?Shakurov G.?R.?Bulka N.?M.?Nizamutdinov V.?M.?Vinokurov 《Applied magnetic resonance》2004,26(4):533-542
An electron paramagnetic resonance (EPR) study of a synthetic single crystal of LiScGeO4 doped with Cr ions carried out earlier at the X- and Q-bands at 300, K has indicated additional weak lines. A detailed analysis of these EPR lines, which were tentatively attributed to the Fe3+ ions at two different mirror symmetry sites, is presented in this paper. The angular dependences in the three crystallographic planes were resolved by fitting the two distinct spectra denoted Fe3+(I) and Fe3+(II) with a spin Hamiltonian (S=5/2) of monoclinic symmetry. The rank-4 crystal field tensors at tetrahedral and octahedral sites were calculated with the point-charge model to determine the principal axis orientations of their cubic, tetragonal and trigonal components. A comparative analysis of the zero-field splitting tensors and the crystal field ones indicates that Fe3+(I) ions substitute for Sc3+ at octahedral sites and Fe3+(II) ions substitute for Ge4+ at tetrahedral sites with no significant distorition of the coordination polyhedra in the structure of LiScGeO4. 相似文献
5.
L. S. Khasanova F. A. Gimalova S. A. Torosyan A. A. Fatykhov M. S. Miftakhov 《Russian Journal of Organic Chemistry》2011,47(8):1125-1129
The acetalization of phenyl 1-thio-α-L-arabinopyranoside with 2,3-butanedione in the medium of MeOH-CH(OMe)3-CSA proceeded with the prevailing formation of the corresponding 3,4-bisacetal that further was converted in compounds, which
were regio- and stereoisomers of disaccharide block of OSW-1. 相似文献
6.
A. A. Galeev N. M. Khasanova A. V. Bykov G. R. Bulka V. M. Vinokurov N. M. Nizamutdinov 《Applied magnetic resonance》1996,11(1):61-86
Dopant Fe3+ ions in tetrahedral and octahedral positions of Ge4+ in the crystal Li2Ge7O15 were studied using EPR. Fe3+ substitutes for Ge4+ with a local charge compensation. The octahedral site and the tetrahedral sites significantly differ by the value of the invariant sumS(B 4) of theB 4 tensor of the spin Hamiltonian of Fe3+. The irreducible tensor products {V 4 ? V 4}4 and {V 4?V 4}2 theV 4 tensor of the crystal field calculated using the point-charge model for octahedral and tetrahedral complexes provide the predominant contribution of the crystal field to theB 4 andB 2 tensors of the spin Hamiltonian of Fe3+, respectively. A comparison of the fourth-rank tensorsB 4 of the spin Hamiltonian and {V 4?V 4}4 of the crystal field determined at 300 K with those determined at 77 K supports the conclusion that the phase transition is accompanied by combined rotation of the [GeO4] tetrahedra with the [Ge(1)O6] octahedron almost unaltered. The spectrum lines are narrow and the variety of point defects in the vicinity of the paramagnetic impurity ions Fe3+, Cr3+ and Cu2+ is not detected. These facts are inconsistent with the statistically distributed model for the Li(2) atom. In specific cases at 300 K, when the wings of the two spectrum lines of theM→M+1 and theM+2 →M+3 transitions of Fe3+ ions belonging to one system of translationally equivalent positions overlap an extra line appears in the center between these lines. It is suggested that this effect is due to the soft phonon mode above the phase transition temperature. 相似文献
7.
8.
9.
A. R. Gataulina E. M. Khasanova N. A. Ulakhovich G. A. Kutyrev M. P. Kutyreva 《Russian Journal of General Chemistry》2018,88(9):1874-1879
A new water-soluble multidentate ligand based on a second-generation hyperbranched polyester containing 3-(morpholin-4-yl)propionate fragments in the terminal position has been synthesized, and its complex with copper(II) has been obtained. The degree of polyester functionalization with aminopropylmorpholine is 56%. 相似文献
10.
R. A. Khasanov N. M. Nizamutdinov N. M. Khasanova V. M. Vinokurov G. S. Morozov A. O. Krivtsov 《Crystallography Reports》2012,57(5):751-757
The conditions for equivalent positions on the (hkl) face of growing crystal are derived using symmetry elements of the space group. It is shown by the example of the sp. gr. D 2h 16 that the conditions of equivalent position formation coincide with conditions of the reflection of diffracted beams by crystal. It is established that electron spin resonance (ESR) centers in barite, SO 4 ? (I) and SO 4 ? (II), with only two conjugate spectra with equal intensity out of four, and SO 4 ? (III), with a different intensity of conjugate spectra K ??M = 2, are localized into the growth pyramid of the (001) face with a [010] step. SO 2 ? , SO 3 ? ,, and SO 4 ? (IV) centers, having an identical intensity of the conjugate ESR spectra with K ??M = 2, are localized into the growth pyramid of the (210) face with a growth step [001]. 相似文献