全文获取类型
收费全文 | 494篇 |
免费 | 0篇 |
专业分类
化学 | 270篇 |
晶体学 | 51篇 |
力学 | 13篇 |
数学 | 25篇 |
物理学 | 135篇 |
出版年
2022年 | 11篇 |
2021年 | 20篇 |
2020年 | 7篇 |
2019年 | 20篇 |
2018年 | 23篇 |
2017年 | 25篇 |
2016年 | 26篇 |
2015年 | 7篇 |
2014年 | 19篇 |
2013年 | 31篇 |
2012年 | 23篇 |
2011年 | 30篇 |
2010年 | 25篇 |
2009年 | 25篇 |
2008年 | 26篇 |
2007年 | 24篇 |
2006年 | 15篇 |
2005年 | 12篇 |
2004年 | 7篇 |
2003年 | 5篇 |
2002年 | 8篇 |
2001年 | 12篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 6篇 |
1997年 | 2篇 |
1996年 | 6篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 2篇 |
1985年 | 5篇 |
1984年 | 7篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 1篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1969年 | 1篇 |
1967年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有494条查询结果,搜索用时 15 毫秒
11.
12.
13.
O. V. Tomchuk M. V. Avdeev V. L. Aksenov V. M. Garamus L. A. Bulavin S. N. Ivashevskaya N. N. Rozhkova N. Schreiber J. Schreiber 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2012,6(5):821-824
The structure of nanodiamond water dispersions prepared under different conditions was investigated by small-angle neutron scattering at the scale of 1 to 100 nm. The study of diluted dispersions was regarded as of paramount importance. Similarly to previous studies, strong clustering of particles was revealed in the solutions. The typical size of clusters (40 nm and above) depends on the modification of the dispersions. A common property can be distinguished for different systems: the fractal dimension of the clusters is in the range of 2.3?C2.4, which indicates that there is a common clustering mechanism in such systems. Using contrast variation, the existence of a nondiamond component in the colloidal particles of the dispersions was confirmed; it correlates with the presence of a graphene shell on crystallite surfaces. 相似文献
14.
V. L. Aksenov A. M. Balagurov S. L. Platonov B. N. Savenko V. P. Glazkov I. V. Naumov 《高压研究》2013,33(1-3):181-191
Abstract A new neutron spectrometer for investigations of elastic and inelastic neutron scattering on polycrystal microsamples under high pressure in diamond and sapphire anvils cells is described. The spectrometer is operating at the IBR-2 pulsed reactor at JINR. The time-of-flight method and ring-shaped multicounter detector are used to register the scattered neutrons. Parameters and methodical peculiarities of the device and the examples of experimental studies are given. 相似文献
15.
Aksenov N. A. Malyuga V. V. Abakarov G. M. Aksenov D. A. Voskressensky L. G. Aksenov A. V. 《Russian Chemical Bulletin》2019,68(5):1047-1051
Russian Chemical Bulletin - A new method for the synthesis of 6,7-dimethoxy-3,4-dihydroisoquinoline based on the reaction of 2-(3,4-dimethoxyphenyl)ethan-1-amine (homoveratrylamine) with aliphatic... 相似文献
16.
V. I. Petrenko M. V. Avdeev V. M. Garamus M. Kubovcikova Z. Gažová K. Šipošová L. A. Bulavin L. Almásy V. L. Aksenov P. Kopcansky 《Physics of the Solid State》2014,56(1):129-133
The structure of filament amyloid aggregates of hen egg white lysozyme in water has been investigated by the small-angle X-ray scattering method. The experimental data are described by different cylindrical models, among which the best agreement is reached with the long helix model. A comparison of the results with the small-angle neutron scattering data reveals the influence of the heavy component of the solvent (a H2O/D2O mixture) on the structure of the filaments. 相似文献
17.
18.
V. V. Aksenov 《Moscow University Physics Bulletin》2015,70(6):558-565
The toroidal (orthogonal) decomposition of the vector potential of a magnetic field is proposed. Based on this decomposition, equations of electrodynamics of non-varying and varying electromagnetic fields are derived. Applications of the developed theory to natural phenomena and laboratory experiments are discussed. 相似文献
19.
M. B. Gazizov R. N. Burangulova R. I. Minnekhanov R. A. Khairullin N. G. Aksenov 《Russian Journal of General Chemistry》2013,83(7):1336-1340
Reaction of dialkyl phosphites with 3-ethylamino- or 3-diethylamino-substituted aldehydes results in the corresponding 3-amino-1-hydroxyalkylphosphonates. The composition and structure of the obtained compounds were confirmed by elemental analysis, NMR spectroscopy and chemical transformations. 相似文献
20.
Starikov FA Kochemasov GG Kulikov SM Manachinsky AN Maslov NV Ogorodnikov AV Sukharev SA Aksenov VP Izmailov IV Kanev FY Atuchin VV Soldatenkov IS 《Optics letters》2007,32(16):2291-2293
Reconstruction the phase front of a vortex laser beam is conducted by use of a Hartmann-Shack wavefront sensor. The vortex beam in the form of the Laguerre-Gaussian LG(0)(1) mode is generated with the help of a spiral phase plate. The new reconstruction technique based on measured wavefront gradients allows one to restore the singular phase surface with good accuracy, whereas the conventional least-squares approach fails. 相似文献