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31.
Thomas Vent‐Schmidt Lester Andrews K. Sahan Thanthiriwatte David A. Dixon Sebastian Riedel 《ChemInform》2015,46(51):no-no
H2ThSe (I) and H2USe (II) are obtained by the reaction of laser‐ablated U and Th with a ≈1:1:1 molar mixture of H2Se, HDSe, and D2Se under cryogenic conditions (CsI window as substrate, 10 K). 相似文献
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Cover Picture: Dinuclear Face‐Sharing Bi‐octahedral Tungsten(VI) Core and Unusual Thermal Behavior in Complex Th Tungstates (Chem. Eur. J. 21/2015) 下载免费PDF全文
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M. N. Sokolov O. A. Gerasko S. F. Solodovnikov V. P. Fedin 《Journal of Structural Chemistry》2004,45(3):490-495
Crystallization from a ThBr4/DMSO/(Et4N)2Mo3S7Br6 mixture in benzonitrile gave [Th2(µ-SO4)2×(DMSO)12]{[Mo3S7Br5(DMSO)]Br}2·2DMSO·PhCN. The complex has an ionic structure. In the [Th2(µ-SO4)2(DMSO)12]4+ centrosymmetric binuclear cation, the metal atoms are bound by two sulfate bridges and are coordinated by DMSO oxygen atoms, the coordination polyhedron of thorium(IV) being a tricapped trigonal prism (c.n. 9). The [Mo3S7Br5(DMSO)]–cluster anion and the bromide ion form an ion pair with Sax...Br– short contacts, and the DMSO molecule is coordinated to one of the molybdenum atoms via the oxygen atom. The voids of the structure are filled with DMSO and PhCN solvate molecules, the latter being disordered over two positions related by an inversion center.Original Russian Text Copyright © 2004 by M. N. Sokolov, O. A. Gerasko, S. F. Solodovnikov, and V. P. FedinTranslated from Zhurnal Strukturnoi Khimii, Vol. 45, No. 3, pp. 516–521, May–June 2004. 相似文献
37.
In recent years, there has been an increasing worldwide interest in accelerator driven systems (ADS) due to their perceived
superior safety characteristics and their potential for burning actinides and long-lived fission products. Indian interest
in ADS has an additional dimension, which is related to our planned large-scale thorium utilization for future nuclear energy
generation.
The physics of ADS is quite different from that of critical reactors. As such, physics studies on ADS reactors are necessary
for gaining an understanding of these systems. Development of theoretical tools and experimental facilities for studying the
physics of ADS reactors constitute important aspect of the ADS development program at BARC. This includes computer codes for
burnup studies based on transport theory and Monte Carlo methods, codes for studying the kinetics of ADS and sub-critical
facilities driven by 14 MeV neutron generators for ADS experiments and development of sub-criticality measurement methods.
The paper discusses the physics issues specific to ADS reactors and presents the status of the reactor physics program and
some of the ADS concepts under study.
相似文献
38.
The formation of difficultly soluble dialkylphosphates, which — as it is well known — are also able to accumulate as crud by precipitation of Zr(IV) or Pu(IV) with dibutylphosphate, can offer problems at the recovery of nuclear fuels, during the purification of crystalline trialkylphosphate-complexes with some of the relevant isotopes, such as of U, Th, Ce and Zr. As those reactions can be already observed at ambient temperature and under exclusion of all radiolytic effects, and since explosive alkylnitrate is being formed during those degradations, conclusions are discussed concerning the technical procedure of the purex process to prevent any influences of possible damages to environment during the recovery. 相似文献
39.
M. Bagge‐Hansen R. A. Outlaw M. Y. Zhu D. M. Manos 《Surface and interface analysis : SIA》2011,43(9):1192-1198
The initial oxidation of clean, polycrystalline α‐Th from background CO/CO2 and saturation of the Th surface by O2 has been examined by angle‐resolved Auger electron spectroscopy (ARAES) and time of flight secondary ion mass spectrometry (ToF‐SIMS). Following dissociative adsorption of very low doses of background CO/CO2 (<1 L), the carbon surface population was dominant and spontaneously formed thorium carbide. The accompanying oxygen population increased at a rate roughly one‐third that of the carbon, suggesting simultaneous oxygen incorporation into the bulk. To further corroborate the surface kinetics of adsorbed oxygen, O2 was admitted, following heating and sputter cleaning of the Th; some oxygen atoms continued to diffuse into the bulk until formation of stoichiometric ThO2 at ~37 L. ARAES measurements showed an oxygen concentration gradient in the near‐surface region confirming rapid oxygen incorporation at low doses; however, once the surface is saturated, virtually no variation in the oxygen intensity is observed. AES and ToF‐SIMS depth profiling revealed complete oxide formation to a depth of 2 nm. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
40.
Laura Bonato Dr. Matthieu Virot Dr. Thomas Dumas Dr. Adel Mesbah Dr. Pierre Lecante Dr. Damien Prieur Dr. Xavier Le Goff Dr. Christoph Hennig Prof. Nicolas Dacheux Dr. Philippe Moisy Dr. Sergey I. Nikitenko 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(41):9580-9585
The preparation and structural characterization of an original Th peroxo sulfate dihydrate, crystallizing at room temperature in the form of stable 1D polymeric microfibres is described. A combination of laboratory and synchrotron techniques allowed solution of the structure of the Th(O2)(SO4)(H2O)2 compound, which crystallizes in a new structure type in the space group Pna21 of the orthorhombic crystal system. Particularly, the peroxide ligand coordinates to the Th cations in an unusual μ3-η2:η2:η2 bridging mode, forming an infinite 1D chain decorated with sulfato ligands exhibiting simultaneously monodentate and bidentate coordination modes. 相似文献