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31.
Sharutin V. V. Egorova I. V. Ivanenko T. K. Pavlushkina I. I. 《Russian Journal of General Chemistry》2002,72(12):1952-1952
Russian Journal of General Chemistry - 相似文献
32.
Sharutin V. V. Egorova I. V. Ivanenko T. K. Sharutina O. K. Gerasimenko A. V. 《Russian Journal of Coordination Chemistry》2003,29(4):297-299
Adduct of triphenylphosphine oxide and sulfuric acid was synthesized by reacting arenesulfonic acids with triphenylphosphine oxide (1 : 2) in the presence of the moisture of air. According to the X-ray diffraction data, the phosphorous atom has a distorted tetrahedral coordination. The sulfuric acid molecule is disordered over two sites and is linked with two triphenylphosphine oxide molecules through hydrogen bonds. 相似文献
33.
34.
Ivanenko AA Ivanenko NB Kuzmenkov MA Jakovleva EM Skudra A Slyadnev MN Ganeev AA 《Analytical and bioanalytical chemistry》2005,381(3):713-720
Techniques that allow the elements present in the air to be determined in a simple and rapid manner are very attractive. Direct aerosol sampling techniques avoid the need to pretreat the filter via wet digestion in order to remove any sources of contamination, and they decrease the precipitation time significantly. Analyzers based on this technique can also determine the concentrations of elements in the air automatically in situ. This paper is concerned with the development of a novel analytical system that is based on electrostatically precipitating aerosols from the air into a graphite furnace. The equipment includes a Zeeman spectrometer with high frequency modulation polarization (MGA-915), and an electrostatic precipitation system incorporated into the analyzer. The high sensitivity of the system developed here means that it can be used to determine element concentrations in the air exhaled by humans, as well as those in ambient air. 相似文献
35.
36.
W. Fuß J. Göthel M. M. Ivanenko K. L. Kompa W. E. Schmid K. Witte 《Zeitschrift für Physik D Atoms, Molecules and Clusters》1994,29(4):291-298
The small absorption is a major problem in isotopically selective IR multiphoton dissociation. Usually the radiation diverges before it is fully absorbed. To solve this problem, we have demonstrated the application of a refocusing (Herriott) multipass cell. It can generally help in laser isotope separation to use the photons more efficiently. Employing such a cell and a Q-switched CO2 laser at high repetition rate, the dissociation yield of CHCIF2 was 23 times higher than in a single pass. The number of passes used (up to 60) was more than is conventionally possible in such small cells. The increased number was permitted by making use of spherical aberration. With 18 passes, we also measured the multiphoton absorption for various wavelengths and pressures, in part separately for12CHCIF2 and13CHCIF2, and also for two-wavelength irradiation. Appropriate change of pressure or wavelength increased the absorption. But the corresponding increase of the dissociation was larger in every case. To explain this and other observations, we invoke the molecular distribution over the energy levels. 相似文献
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38.
B. Gikal S. Dmitriev G. Gulbekian P. Apel’ V. Bashevoi S. Bogomolov O. Borisov V. Buzmakov A. Cherevatenko A. Efremov I. Ivanenko O. Ivanov N. Kazarinov M. Khabarov I. Kolesov V. Mironov A. Papash S. Patschenko V. Skuratov A. Tikhomirov N. Jazvitsky 《Physics of Particles and Nuclei Letters》2008,5(7):629-633
The cyclotron IC-100 station, based on the Laboratory of Nuclear Reactions (JINR, Dubna, Russia), provides the industrial
construction of nuclear filters. During modernization, the cyclotron was equipped with a superconducting ECR-ion source and
an axial injection system. The specialized beam channel with a two coordinate scanning system and equipment for irradiating
polymer films was installed in the implantation part of the station. High intensity heavy ion beams of Ne, Ar, Fe, Kr, Xe,
I, and W have been accelerated to 1 MeV/nucleon energy. The investigation into irradiated crystals features and irradiation
of different polymer films is provided. Also, a few thousands square meters of track films with holes in the wide range of
densities were produced. The cyclotron-based station is capable of solving different kinds of scientific and applied problems
as well.
The text was submitted by the authors in English. 相似文献
39.
The insufficient energy resolution of detectors is the reason of effect of interelement influence, which reduces a precision in energy-dispersive X-ray fluorescence analysis (XRED) with semi-conductor detectrs and new method of total external reflection (TXRF) which ensures record sensitivity - up to (10-11-10-13) g. Taking into account this effect is a necessary stage of existing analysis techniques which tend to ensure identity of composition of sample and standard or use decomposition of a multiple on components on spectra of the monostandards. However, an impossibility to achieve an absolute identity of sample composition as well as fluctuations of the energy resolution result in serious errors and do not allow to analyze and take into consideration the effect of elements not present in composition of the standards. 相似文献
40.
V. I. Ivanenko I. V. Zatovsky N. S. Slobodyanik P. G. Nagornyi V. N. Baumer 《Crystal Research and Technology》2008,43(4):355-361
Zirconium‐doped KTiOPO4 (KTP) crystals were grown using a high temperature flux method in the K2O‐P2O5‐TiO2‐ZrF4 system. The dopant content in the single crystals with general composition KTi1‐xZrxOPO4 (where x = 0 – 0.026) strongly depends on zirconium concentration in the homogeneous melts. AES‐ICP method and X‐ray fluorescence analysis were used to determine the composition of the obtained crystals. Phase analyses of the products were performed using the powder XRD. The structures of KTiOPO4 containing different quantities of Zr were refined on the basis of single crystal XRD data. Applying ZrF4 precursor for zirconium injection into the flux allowed growing the zirconium‐doped KTP crystals at 930–750°C. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献