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61.
A novel equilibrium theory is developed for two price markets permitting investors to trade personally designed structured
products. Classical market clearing is enhanced for structured products where the market allows these products to be freely
bought at ask prices or sold for bid prices. Competitive pressures lead the market to lower the ask prices and raise the bid
prices with the market offering individual investors the widest possible set of acceptable risks provided the aggregate counter
cash flow held by the market is consistent with a more conservative prespecified set of acceptable risks. We learn that in
equilibrium heterogeneous investors inherit a common hedging objective of maximizing the bid prices of the final structured
product sold to market or equivalently minimizing the ask price of what is bought. 相似文献
62.
A tridentate Schiff base ligand [(CH3)2NCH2CH2N=C(CH3)C6H4OH)] (LH) has been synthesized from 2-hydroxyacetophenone and 2-dimethylaminoethylamine. This ligand forms the neutral complexes [Co(L)(N3){o-(CH3C=O)C6H4O}] (1) and [Co(L)(SCN){o-(CH3C=O)C6H4O}]·1/2H2O (2) in presence of equivalent amount of Co(II) acetate, and sodium azide for 1 and sodium thiocyanate for 2. The complexes have been characterized by spectroscopic and crystallographic methods. The coordination geometry around Co(III) in both the complexes is distorted octahedral with one tridentate ligand L, one bidentate 2-hydroxyacetophenone and one monodentate azide for 1 and thiocyanate for 2. The azide and thiocyanate ligands in the two complexes occupy different positions relative to the coordination sites of L. 相似文献
63.
64.
Hydrogenation reactions of olefinic hydrocarbons using ruthenium-incorporated pillared montmorillonite as catalysts are reported.
Depending on the steric hindrance, Ru/pillared montmorillonite selectively reduces carbon-carbon double bonds using hydrogen
under pressure. 相似文献
65.
Formal syntheses of hirsutic acid C and complicatic acid via cycloaddition of cyclohexa-2,4-dienone with methyl methacrylate and a triplet sensitized 1,2-acyl shift are described. The X-ray crystal structure of one of the key intermediates is also reported. 相似文献
66.
The densities of 1-n-butyl-3-methylimidazolium ([Bmim]) based amino acid ionic liquids (AAILs) prepared from glycine [Gly], alanine [Ala], and valine [Val], namely [Bmim][Gly], [Bmim][Ala] and [Bmim][Val], in aqueous?~?0.2 mol·kg?1 polyethylene glycol (PEG400, PEG600 or PEG1000) and PEG400 solutions containing?~?(0.0946, 0.1891 and 0.3820) mol·kg?1 of [Bmim][Gly], have been determined at 298.15 K. The experimental densities were used to evaluate the apparent molar volumes in the mixed solvent system and further used to obtain transfer molar volumes of AAILs for their transfer from water to aqueous PEG solutions and of PEG400 for its transfer from water to aqueous solutions containing (0.0946, 0.1891 and 0.3820) mol·kg?1 of [Bmim][Gly]. The transfer molar volumes of AAILs and of PEG400 are found to be negative. The effects of alkyl chain-length variation on the anion of AAILs as well as the chain-length of PEG on transfer molar volumes are investigated and discussed in terms of hydrophobic–hydrophilic, hydrophobic–hydrophobic, and ion–hydrophobic interactions. 相似文献
67.
Ankita Chakraborty Sudipto Debnath Tanmoy Ghosh Dilip K. Maiti Swapan Majumdar 《Tetrahedron》2018,74(40):5932-5941
A sustainable route for the N-1 alkylation of imidazole and benzimidazole derivatives has been developed under volatile organic solvent free condition in alkaline water-SDS system. Incorporation of SDS in the reaction medium enhances the reaction rate by suppressing the solubility issue that arises for different substrates. This method provides high yield of the alkylated product in a shorter reaction time. For reactive alkyl halides reaction proceeds at ambient temperature whereas in the cases of less reactive alkyl halides require 55–60?°C to complete alkylation process. N-alkylation induced ring opening of the heterocyclic ring in benzimidazole derivatives to multifunctional aromatic compounds were noticed at 60?°C when more than two equivalents of alkyl halide was used. 相似文献
68.
Georgina M. Rosair Dilip Kumar Dey Brajagopal Samanta Samiran Mitra 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(4):m266-m267
The structure of the title dimethyltin(IV) complex, [2‐(5‐bromo‐2‐oxidobenzylideneamino)benzoato‐κ3O,N,O′]dimethyltin(IV), [Sn(CH3)2(C14H8BrNO3)], features centrosymmetric dimers disposed about a central Sn2O2 core. Each Sn centre has seven‐coordinate pentagonal–bipyramidal geometry, taking into account two moderately long Sn—O contacts about an inversion centre [2.679 (4) and 2.981 (4) Å]. The methyl groups are in an axial orientation. 相似文献
69.
In the 3.33–4.95 pH range, buffered with an excess of phenanthroline (phen), [Mn
3
IV
(-O)4(phen)4(H2O)2]4+
(1) quantitatively oxidises H2O2 to O2; the only manganese product is [Mn
2
III,IV
(-O)2(phen)4]3+
(2), provided a large excess of H2O2 is avoided; an excess of H2O2 [ > 7 × (1)] reduces (1) to Mn2+. When (1) and H2O2 were mixed in the stoichiometric molar proportion (1:0.75), the measured second-order rate constant for the reduction of (1) to (2) increased with increasing [H+], tending to saturate at lower pH. Added phenanthroline did not affect the rate constant. The results suggest an inner-sphere mechanism, ca. 10 times higher kinetic activity for (1) than for its hydroxo derivative [Mn
3
IV
(-O)4(phen)4(OH)(H2O)]3+
(1h), and a hydrolysis constant K
a = (2.9 ± 1) × 10–4 mol dm–3 for (1) (1h) + H+. 相似文献
70.
Pradhan Rabindranath Bhattacharyya Ramgopal Kumar Sanjay Banerjee Dilip 《Transition Metal Chemistry》1999,24(4):431-435
Tetrathiomolybdate reacts with iron (II) in the presence of bidentate ligands to form neutral binuclear complexes [Fe(N–N)2MoS4] [N–N=2-2bipyridine(bipy) and 1,10-phenanthroline(phen)] showing intermediate spin character for FeII. The spin state of the complexes has been examined by variable temperature magnetic moment (VTM) measurements and by variable temperature Mössbauer spectroscopy. The Mössbauer spectra indicate the presence of two iron sites: one of intermediate spin and the other of low spin at room temperature. The low spin site predominates over the intermediate spin as the temperature is lowered. The structural features of the complexes are supported by i.r., Raman, electronic and FAB mass spectra and by X-ray powder diffraction data. Substitution of one bipy/phen ligand in [Fe(N–N)3]2+ by MS4
2– ligands does not impart any major effect towards the size of the redox potentials of the tris-bipy/phen complexes, although the reversible nature of their cyclic voltammetric response is affected. 相似文献