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91.
I. S. Mashkovsky P. V. Markov G. O. Bragina G. N. Baeva A. V. Bukhtiyarov I. P. Prosvirin V. I. Bukhtiyarov A. Yu. Stakheev 《Kinetics and Catalysis》2017,58(4):471-479
The structure of the Pd–Zn/α-Al2O3 catalyst, which was prepared by a joint impregnation method, was studied. According to XRD analysis data, supported intermetallic Pd–Zn particles were formed in a temperature range of 200–600°C. At 600°C, the crystal lattice of substitutional solid solution based on Pd (FCC) was finally rearranged into the tetragonal lattice of Pd–Zn. A shift of the Pd3d 5/2 line in the XPS spectrum indicated the formation of the Pd–Zn intermetallic compound. 相似文献
92.
High‐Resolution 3D Proton MRI of Hyperpolarized Gas Enabled by Parahydrogen and Rh/TiO2 Heterogeneous Catalyst 下载免费PDF全文
Dr. Kirill V. Kovtunov Danila A. Barskiy Aaron M. Coffey Dr. Milton L. Truong Oleg G. Salnikov Alexander K. Khudorozhkov Elizaveta A. Inozemtseva Dr. Igor P. Prosvirin Prof. Valery I. Bukhtiyarov Dr. Kevin W. Waddell Dr. Eduard Y. Chekmenev Prof. Igor V. Koptyug 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(37):11636-11639
Several supported metal catalysts were synthesized, characterized, and tested in heterogeneous hydrogenation of propene with parahydrogen to maximize nuclear spin hyperpolarization of propane gas using parahydrogen induced polarization (PHIP). The Rh/TiO2 catalyst with a metal particle size of 1.6 nm was found to be the most active and effective in the pairwise hydrogen addition and robust, demonstrating reproducible results with multiple hydrogenation experiments and stability for ≥1.5 years. 3D 1H magnetic resonance imaging (MRI) of 1 % hyperpolarized flowing gas with microscale spatial resolution (625×625×625 μm3) and large imaging matrix (128×128×32) was demonstrated by using a preclinical 4.7 T scanner and 17.4 s imaging scan time. 相似文献
93.
94.
Evgueni Barmatov Andrey Prosvirin Marina Barmatova Yuri Galyametdinov Wolfgang Haase Valery Shibaev 《Macromolecular rapid communications》2000,21(6):281-286
The new series of the LC ionomers containing copper ions has been obtained and their phase behavior has been studied. It was shown that at low metal ion concentrations in the LC ionomers (˜2 mol‐%) the induction of the SmA phase is observed. An increase in the copper ion concentration is accompanied by a slight rise in clearing and glass transition temperatures. The magnetic properties of LC ionomers were studied at the first time. It was shown that LC ionomers are antiferromagneties with a strong exchange interaction J = 174–178 cm–1. Temperature dependencies of the magnetic moment and the magnetic anisotropy are adequately described in the framework of the 1‐D‐Heisenberg linear‐chain model. 相似文献
95.
Perevalov T. V. Iskhakzai R. M. Kh. Aliev V. Sh. Gritsenko V. A. Prosvirin I. P. 《Journal of Experimental and Theoretical Physics》2020,131(6):940-944
Journal of Experimental and Theoretical Physics - The silicon oxide thin films obtained by thermal SiO2 treatment in hydrogen electron cyclotron resonance plasma at various exposure times are... 相似文献
96.
Markov P. V. Bukhtiyarov A. V. Mashkovsky I. S. Smirnova N. S. Prosvirin I. P. Vinokurov Z. S. Panafidin M. A. Baeva G. N. Zubavichus Ya. V. Bukhtiyarov V. I. Stakheev A. Yu. 《Kinetics and Catalysis》2019,60(6):842-850
Kinetics and Catalysis - The structure and catalytic characteristics of a bimetallic catalyst containing Pd1In1 nanoparticles deposited on the surface of γ-Al2O3 were studied. The formation of... 相似文献
97.
O. E. Tereshchenko K. A. Kokh V. V. Atuchin K. N. Romanyuk S. V. Makarenko V. A. Golyashov A. S. Kozhukhov I. P. Prosvirin A. A. Shklyaev 《JETP Letters》2011,94(6):465-468
The inertness of the cleaved (0001) surface of a Bi2Se3 single crystal to oxidation has been demonstrated using X-ray photoelectron spectroscopy, as well as atomic-force and scanning
tunneling microscopy and spectroscopy. No intrinsic bismuth and selenium oxides are formed on the surface after a month of
storage in air. Atomically flat surfaces with macroscopic sizes (∼1 cm2) and rms roughness less than 0.1 nm have been prepared, and (1 × 1)-(0001) Bi2Se3 atomic structure has been resolved. The tunneling conductance measurements have shown that the energy dependence of the surface
density of states is quasilinear in the band gap of Bi2Se3. 相似文献
98.
Kinetics and Catalysis - The LaMn1 – xFexO3 (х = 0–1) perovskites were prepared by the Pechini route and characterized by X-ray diffraction analysis, HR TEM, XPS, and BET. Their... 相似文献
99.
Armatas NG Allis DG Prosvirin A Carnutu G O'Connor CJ Dunbar K Zubieta J 《Inorganic chemistry》2008,47(3):832-854
Hydrothermal conditions have been used in the preparation of a series of organic-inorganic hybrid materials of the cobalt-molybdophosphonate family. The reactions of MoO(3), cobalt(II) acetate or cobalt(II) acetylacetonate, tetra-2-pyridylpyrazine (tpyprz), and organodiphosphonic acids H(2)O(3)P(CH(2))nPO(3)H(2) (n = 1-5 and 9) of varying tether lengths yielded compounds of the general type {Co(2)(tpyprz)(H(2)O)(m)}4+/MoxOy{O(3)P(CH(2))(n)PO(3)}z. The recurring theme of the structural chemistry is the incorporation of {Mo(5)O(15)(O(3)PR)(2)}(4-) clusters as molecular building blocks observed in the structures of nine phases (compounds 2-9 and 11). The structural consequences of variations in reaction conditions are most apparent in the series with propylene diphosphonate, where four unique structures 4-7 are observed, including two distinct three-dimensional architectures for compounds 5 and 6 whose formulations differ only in the number of water molecules of crystallization. With pentyldiphosphonate, a second phase 10 is obtained which exhibits a unique cluster building block, the hexamolybdate [Mo(6)O(18){O(3)P(CH(2))(5)PO(3)}](4-). In the case of methylenediphosphonic acid, a third structural motif, the trinuclear {(Mo(3)O(8))(O(3)PCH(2)PO(3))}2- subunit, is observed in compound 1. The structural chemistry of compounds 1-11 of this study is quite distinct from that of the {Ni(2)(tpyprz)(H(2)O)(m)}(4+)/Mo(x)O(y){O(3)P(CH(2))(n)PO(3)}z family, as well as that of the copper-based family. The structural diversity of this general class of materials reflects the coordination preferences of the M(II) sites, the extent of aqua ligation to the M(II) sites, the participation of both phosphate oxygen atoms and molybdate oxo-groups in linking to the M(II) sites, and the variability in the number of attachment sites at the molybdophosphonate clusters. Since the charge densities at the peripheral oxygen atoms of the clusters are quite uniform, the attachment of {M(2)(tpyprz)}(4+) subunits to the molybdophosphonates appears to be largely determined by steric, coulombic, and packing factors, as shown by extensive density functional theory calculations. 相似文献
100.
Zenkovets G. A. Shutilov A. A. Bondareva V. M. Dovlitova L. S. Sobolev V. I. Marchuk A. S. Tsybulya S. V. Prosvirin I. P. 《Kinetics and Catalysis》2021,62(2):315-327
Kinetics and Catalysis - A multicomponent MoVSbNbCeOx/SiO2 oxide catalyst exhibiting high catalytic activity in the oxidative dehydrogenation of ethane to ethylene is synthesized by spray drying of... 相似文献