全文获取类型
收费全文 | 111篇 |
免费 | 0篇 |
专业分类
化学 | 60篇 |
晶体学 | 3篇 |
力学 | 2篇 |
数学 | 2篇 |
物理学 | 44篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 2篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 2篇 |
2011年 | 5篇 |
2010年 | 2篇 |
2009年 | 1篇 |
2008年 | 9篇 |
2007年 | 7篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2003年 | 5篇 |
2002年 | 2篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 6篇 |
1983年 | 4篇 |
1982年 | 1篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1933年 | 1篇 |
排序方式: 共有111条查询结果,搜索用时 15 毫秒
101.
J. Eury A. Pinkus M. Katzenstein E. Cattelain Foerster O. Bailly E. P. Fenimore E. C. Wagner G. Mc. P. Smith W. L. Semon E. J. Schorn R. M. Mc Crone J. Barceló W. Herzog Jean R. Bernier G. Péron J. Golse A. Delauney A. Stock W. Zimmermann J. Bodnár E. Szép 《Analytical and bioanalytical chemistry》1933,93(11-12):470-480
102.
L. Henrard A. Loiseau C. Journet P. Bernier 《The European Physical Journal B - Condensed Matter and Complex Systems》2000,13(4):661-669
Determining precisely the atomic structure of single-wall carbon nanotubes is essential since it tailors electronic properties
of this new carbon material. Here, we present a quantitative electron diffraction study of electric-arc produced single-wall
carbon nanotube bundles, combined with simulations based on the kinematic theory and with real-space images. We stress the
importance of the twist of the bundle in the interpretation of our data and we analyze both packing lattice parameters and
chirality distribution. We show that, within a given bundle, no chirality is favoured whereas SWNT diameters are almost uniform.
Received 5 February 1999 相似文献
103.
Aggarwal MM Ahammed Z Angelis AL Antonenko V Arefiev V Astakhov V Avdeitchikov V Awes TC Baba PV Badyal SK Bathe S Batiounia B Bernier T Bhalla KB Bhatia VS Blume C Bucher D Büsching H Carlén L Chattopadhyay S Decowski MP Delagrange H Donni P Dutta Majumdar MR el Chenawi K Dubey AK Enosawa K Fokin S Frolov V Ganti MS Garpman S Gavrishchuk O Geurts FJ Ghosh TK Glasow R Guskov B Gustafsson HA Gutbrod HH Hrivnacova I Ippolitov M Kalechofsky H Karadjev K Karpio K Kolb BW Kosarev I Koutcheryaev I 《Physical review letters》2004,93(2):022301
Two-particle correlations of direct photons were measured in central 208Pb+208Pb collisions at 158A GeV. The invariant interferometric radii were extracted for 100相似文献
104.
Synthesis of highly nitrogen-doped multi-walled carbon nanotubes 总被引:1,自引:0,他引:1
Glerup M Castignolles M Holzinger M Hug G Loiseau A Bernier P 《Chemical communications (Cambridge, England)》2003,(20):2542-2543
We present a new synthesis route for nitrogen doped carbon nanotubes (CNx) based on the aerosol method. Tubes with a record high concentration of nitrogen (approximately 20 atom%) have been synthesized, confirmed by electron energy loss spectroscopy (EELS). A strong correlation between the N/C ratio and morphology of the tubes is observed and discussed. 相似文献
105.
Magnetic properties of lithium ferrite crystallites distributed in a glassy matrix vary with their average size d: (1) d ? 100 Å: superparamagnetism d and the limits of the distribution have been calculated by fitting magnetisation curves vs applied field. (2) d ? 150 Å: ferrimagnetism with a hysteresis loop maximum for the monodomain size (260 ± 40 Å). (3) 100 ? d ? 150 Å: superposition of the two preceding phenomena. 相似文献
106.
Aggarwal MM Agnihotri A Ahammed Z Angelis AL Antonenko V Arefiev V Astakhov V Avdeitchikov V Awes TC Baba PV Badyal SK Barlag C Bathe S Batiounia B Bernier T Bhalla KB Bhatia VS Blume C Bock R Bohne EM Böröcz Z Bucher D Buijs A Büsching H Carlen L Chalyshev V Chattopadhyay S Cherbatchev R Chujo T Claussen A Das AC Decowski MP Delagrange H Djordjadze V Donni P Doubovik I Dutt S Dutta Majumdar MR El Chenawi K Eliseev S Enosawa K Foka P Fokin S Ganti MS Garpman S Gavrishchuk O Geurts FJ Ghosh TK 《Physical review letters》2000,85(14):2895-2899
Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb+Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source. 相似文献
107.
John R. Miecznikowski Nicholas A. Bernier Christopher A. Van Akin Sheila C. Bonitatibus Maura E. Morgan Rami M. Kharbouch Brandon Q. Mercado Matthew A. Lynn 《Transition Metal Chemistry》2018,43(1):21-29
A ruthenium (II) N-heterocyclic carbene (NHC) complex was synthesized to investigate ligand dissociation as a possible deactivation pathway for the catalytic cycle of a transfer hydrogenation reaction. Diiodo(1,3-dimethylbenzimidazole-2-ylidene)(p-cymene)ruthenium(II) was synthesized for use as the catalytic species and characterized using physico-chemical, spectroscopic methods, and single crystal X-ray diffraction. The transfer of hydrogen from isopropanol to acetophenone was followed using 1H NMR. We observed 94% conversion of the substrate to the alcohol product after 1 h. We also found that the p-cymene complex decomposed during the catalytic reaction to the extent of 80% deactivation after 1 h, based on 1H NMR spectrometry. From Gaussian calculations, an ultraviolet–visible spectrum that is in excellent agreement with the actual spectrum was computed, giving insight into the nature of the absorptions observed experimentally. 相似文献
108.
Mosquitoes transmit pathogens that result in diseases harmful to human, livestock, and wildlife hosts. Numerous measures can be used to reduce insect-borne disease risk to humans, and one approach is the use of topical repellents to prevent host-seeking arthropods from taking a blood meal. A current emphasis in the development of new repellents is that they be safe. Therefore, natural products sources are increasingly being explored. Compounds from plants of the mint family (Lamiaceae) have been demonstrated to be insect repellents. This study examines compounds from Etonia rosemary (Conradina etonia) to identify compounds for examination as insect repellents. Samples of Etonia rosemary were passively extracted with hexane, dichloromethane, and methanol and analyzed by GC/MS. This extraction method was chosen to eliminate thermal degradation of plant components that can occur during the distillation procedure. Additional headspace volatile compounds from this plant were identified using microscale purge-and-trap GC/MS. A variety of terpenes, terpenic alcohols, ketones, and aldehydes were identified in the extracts with terpenes and short-chained aldehydes detected in greatest abundance. 相似文献
109.
Dellinger J Bernier D Cluzel B Le Roux X Lupu A de Fornel F Cassan E 《Optics letters》2011,36(7):1074-1076
The optical near-field technique is applied to provide a direct experimental observation of the refracted beam propagation inside a photonic crystal structure displaying a superprism effect. The obtained results show a 35° light beam angle deviation for a wavelength variation from 1500 to 1600 nm. The experimentally determined beam divergence is in good agreement with modeling predictions and previously performed transmittance experiments. A marked self-collimation propagation over a broad 20 nm wide spectral range centered at λ=1550 nm is experimentally demonstrated. The developed technique opens promising perspectives for the invisibility cloaking structures investigation. 相似文献
110.
Aggarwal MM Ahammed Z Angelis AL Antonenko V Arefiev V Astakhov V Avdeitchikov V Awes TC Baba PV Badyal SK Bathe S Batiounia B Baumann C Bernier T Bhalla KB Bhatia VS Blume C Bucher D Büsching H Carlén L Chattopadhyay S Decowski MP Delagrange H Donni P Majumdar MR El Chenawi K Dubey AK Enosawa K Fokin S Frolov V Ganti MS Garpman S Gavrishchuk O Geurts FJ Ghosh TK Glasow R Guskov B Gustafsson HA Gutbrod HH Hrivnacova I Ippolitov M Kalechofsky H Kamermans R Karadjev K Karpio K Kolb BW Kosarev I 《Physical review letters》2008,100(24):242301
Neutral pion transverse momentum spectra were measured in p+C and p+Pb collisions at sqrt[S{NN}]=17.4 GeV at midrapidity (2.3 less than or approximately equal eta{lab} less than or approximately equal 3.0) over the range 0.7 less than or approximately equal p{T} less than or approximately equal 3.5 GeV/c. The spectra are compared to pi{0} spectra measured in Pb+Pb collisions at sqrt[S{NN}]=17.3 GeV in the same experiment. For a wide range of Pb+Pb centralities (N{part} less than or approximately equal 300), the yield of pi{0}'s with p{T} greater than or approximately equal 2 GeV/c is larger than or consistent with the p+C or p+Pb yields scaled with the number of nucleon-nucleon collisions (N{coll}), while for central Pb+Pb collisions with N{part}greater than or approximately equal 350, the pi{0} yield is suppressed. 相似文献