全文获取类型
收费全文 | 249篇 |
免费 | 0篇 |
专业分类
化学 | 195篇 |
晶体学 | 4篇 |
力学 | 10篇 |
数学 | 8篇 |
物理学 | 32篇 |
出版年
2022年 | 7篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 6篇 |
2017年 | 9篇 |
2016年 | 8篇 |
2015年 | 2篇 |
2014年 | 4篇 |
2013年 | 5篇 |
2012年 | 8篇 |
2011年 | 5篇 |
2010年 | 6篇 |
2009年 | 5篇 |
2008年 | 6篇 |
2007年 | 5篇 |
2006年 | 7篇 |
2005年 | 5篇 |
2004年 | 7篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1996年 | 2篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 3篇 |
1989年 | 3篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 6篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 8篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 8篇 |
1978年 | 4篇 |
1977年 | 8篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1974年 | 8篇 |
1972年 | 5篇 |
1971年 | 4篇 |
1969年 | 4篇 |
1968年 | 2篇 |
1967年 | 3篇 |
1966年 | 3篇 |
1958年 | 1篇 |
1935年 | 2篇 |
排序方式: 共有249条查询结果,搜索用时 203 毫秒
31.
32.
33.
Absorption electronic spectra of MoO and WO molecules have been investigated by a intracavity laser technique in the region 550–800 run. New features have been discovered. As for MoO molecule the rotational analysis of the four bands have been carried out for the first time. Two of these bands were referred to 0–0 transitions arisen from the new (probable triplet) low-lying electronic state, two other bands were referred to transitions arisen from excited components of X5II ground state. As for WO molecule the rotational analysis of 0–0 and 1–0 bands represented A-X and B-X systems have been carried out for the first time. The new band has been discovered which has been referred to new electronic transition. Molecular constants of new states of both molecules studied have been evaluated. 相似文献
34.
Grigor’eva N. G. Agliullin M. R. Kostyleva S. A. Bubennov S. V. Bikbaeva V. R. Gataulin A. R. Filippova N. A. Kutepov B. I. Narender Nama 《Kinetics and Catalysis》2019,60(6):733-743
Kinetics and Catalysis - The catalytic properties of samples of amorphous mesoporous aluminosilicate ASM with different Si/Al molar ratios (40, 80, 160) were studied in the synthesis of practically... 相似文献
35.
Vashurin A. S. Tikhomirova T. V. Filippova A. A. Futerman N. A. Maizlish V. E. Marfin Yu. S. 《Russian Chemical Bulletin》2020,69(7):1349-1354
Russian Chemical Bulletin - Tetrakis(4-bromophenoxy)phthalocyanine and its metal complexes (M = Mg, Co, Cu, Zn) were synthesized. Sulfochlorination of these compounds followed by hydrolysis of the... 相似文献
36.
I. G. Filippova O. A. Bologa Yu. A. Simonov M. Gdaniec N. V. Gerbeleu 《Russian Journal of Coordination Chemistry》2008,34(2):79-84
Polynuclear complexes were synthesized from Zn(II) and Cu(II) compounds and thiosemicarbazidodiacetic acid and their structures were studied. The formation of four-, five-, and nonanuclear clusters was shown to depend on the metal nature and the synthesis conditions. 相似文献
37.
O. A. Novodvorsky O. D. Khramova E. O. Filippova C. Wenzel J. W. Bartha 《Optics and Lasers in Engineering》1999,32(5):449
The laser plasma plume expansion induced by UV nanosecond irradiation from metallic Nb and Ta targets has been studied using Langmuir probe time-of-flight measurements. The ion current shape was measured as a function of the laser radiation flux at various probe-to-target distances. The ion velocity distribution and the ion energy spectra have been determined by measuring the time of flight of ions reaching the Langmuir probe. A multi-mode velocity distribution of ions has been revealed. The dependence of the amplitudes of the plume energy components on the plume scatter time and on the laser radiation flux has been investigated. The experimental time-of-flight data have been compared with a Maxwell velocity distribution. The threshold values of the laser intensity were determined for different distribution modes in the ion energy spectrum. 相似文献
38.
A. S. Filippova 《Mechanics of Solids》2015,50(6):622-632
In the framework of classical mechanics, we perform an amplitude-frequency analysis of a small-parameter model of the Earth pole diurnal oscillations under the action of luni-solar gravitational-tidal torques. The Euler–Liouville dynamic equations with irregular perturbations taken into account are used to obtain the structural properties of diurnal oscillations of the Earth pole coordinates. The results of the Earth pole motion simulation are compared with the high-precision data of VLBI observations on a short time interval. 相似文献
39.
F. M. Filippova R. R. Spiridonova A. M. Kochnev Ya. D. Samuilov 《Russian Journal of General Chemistry》2012,82(11):1838-1841
Piperidine N-carboxamides were shown to activate the anionic polymerization of ?-caprolactam. The activator structure affects properties of the resulting polycaproamide. 相似文献
40.
A. G. Filippova L. G. Kirillova N. A. Okhotina N. K. Dvoyashkin A. V. Filippov S. I. Vol'fson A. G. Liakumovich Ya. D. Samuilov 《Colloid Journal》2000,62(6):755-758
Polymer–bitumen binders for the highway engineering were obtained by the addition of a ternary ethylene–propylene rubber to a bitumen. The addition of a vulcanizing agent to a polymer–bitumen composition caused the structuring of the system through cross-linking of rubber molecules in the bitumen matrix that was confirmed by the study of structural viscosity of the polymer–bitumen compositions, as well as molecular mobility by the methods of NMR-relaxation and pulsed field gradient NMR-relaxation (self-diffusion). 相似文献