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Satu-Pia Reinikainen Pertti Laine Pentti Minkkinen Pentti Paatero 《Analytical and bioanalytical chemistry》2001,369(7-8):727-732
Multivariate data analysis methods (4-way Candecomp-PARAFAC model solved with Multilinear Engine (ME-1)) were used to interpret
the data of over two decades to study the changes in the water of Lake Saimaa in Finland. Earlier studies have shown that
it is difficult to extract the natural background from the other sources of variation. By using the multilinear model three
interpretable factors representing natural and anthropogenic processes could be extracted. The natural long-term variation,
seasonal fluctuation and dilution of discharges in the recipient area could be extracted into their own factors, which could
be easily visualized. The variation could be also presented with estimated variation in the water quality parameters caused
by each of these natural or anthropogenic processes.
Received: 27 September 2000 / Revised: 11 January 2001 / Accepted: 14 January 2001 相似文献
76.
In this paper, we present an existence result for weak efficient solution for the vector optimization problem. The result is stated for invex strongly compactly Lipschitz functions. 相似文献
77.
Martin Sahlberg Premysl Beran Thomas Kollin Nielsen Yngve Cerenius Krisztina Kads Marko P.J. Punkkinen Levente Vitos Olle Eriksson Torben R. Jensen Yvonne Andersson 《Journal of solid state chemistry》2009,182(11):3113-3117
A novel aluminium rich alloy for hydrogen storage has been discovered, ScAl0.8Mg0.2, which has very promising properties regarding hydrogen storage capacity, kinetics and stability towards air oxidation in comparison to hydrogen absorption in state-of-the-art intermetallic compounds. The absorption of hydrogen was found to be very fast, even without adding any catalyst, and reversible. The discovered alloy crystallizes in a CsCl-type structure, but decomposes to ScH2 and Al(Mg) during hydrogen absorption. Detailed analysis of the hydrogen absorption in ScAl0.8Mg0.2 has been performed using in situ synchrotron radiation powder X-ray diffraction, neutron powder diffraction and quantum mechanical calculations. The results from theory and experiments are in good agreement with each other. 相似文献
78.
Heinz Falk Helmut Marko Norbert Müller Wolfgang Schmitzberger Hugo Stumpe 《Monatshefte für Chemie / Chemical Monthly》1990,121(11):893-901
Summary Apomyoglobin was reconstituted with bile pigments of the verdinoid, 2,3-dihydroverdinoid, pterobilinoid, and violinoid type. Absorption and circular dichroism data as well as formation constants of the complexes were measured. From these results it was concluded that chromophore binding and induced chirality of these pigments are mainly governed by a lipophilic region opposite to the propionic side chain(s) and the asymmetric position of the hydrogen bonding acceptors of the propionic acid side chain(s) at the entrance of the protein pocket.Dedicated to Prof. Dr. A. Eschenmoser on occasion of his 65th birthday 相似文献
79.
Mirjana M. Radanović Marko V. Rodić Stevan Armaković Sanja J. Armaković Ljiljana S. Vojinović-Ješić Vukadin M. Leovac 《Journal of Coordination Chemistry》2017,70(16):2870-2887
Two nitrate salts of the well-known, and due to its significant biological activity very important, compound pyridoxylidene aminoguanidine (PLAG) were obtained in the form of single crystals. Thus this ligand is structurally characterized for the first time. In addition, the first data on the structure of a Schiff base of aminoguanidine with the active form of vitamin B6, i.e. pyridoxal-phosphate, of the formula PLPAG·HCl·2H2O, are presented. Two new square-pyramidal Cu(II) complexes of PLAG were synthesized and their physicochemical and structural properties analyzed. In these complexes, PLAG is coordinated as a zwitter-ion, in a tridentate ONN manner, via the oxygen atom of the deprotonated phenolic OH-group and nitrogen atoms of the azomethine and imino group of the aminoguanidine moiety. For the first time it was possible to make a comparative analysis of the structural properties of ligand salts and the coordinated ligand, so the effects of coordination could be unequivocally pointed out. Common fragments encountered in ligand structures were compared by half-normal probability plots. Density functional theory calculations have been conducted in order to gain insight into reactive properties of the investigated molecules. Molecular electrostatic potential, average local ionization energy surfaces, and Fukui functions have been calculated in order to obtain further information on the reactive properties. 相似文献
80.
Nives Škrlj Vladka Čurin Šerbec Marko Dolinar 《Applied biochemistry and biotechnology》2010,160(6):1808-1821
Prion diseases are incurable neurodegenerative diseases that affect both humans and animals. The infectious agent is a pathogenic
form of the prion protein that accumulates in brain as amyloids. Currently, there is neither cure nor reliable preclinical
diagnostics on the market available. The growing number of reports shows that passive immunisation is one of the most promising
strategies for prion disease therapy, where antibodies against prions may prevent and even cure the infection. Since antibodies
are large molecules and, thus, might not be suitable for the therapy, different antibody fragments are a good alternative.
Therefore, we have designed and prepared single-chain antibody fragments (scFvs) derived from the PrPSc-specific murine monoclonal antibody V5B2. Using a new expression vector pMD204, we produced scFvs in two opposing chain orientations
in the periplasm of Escherichia coli. Both recombinant antibody fragments retained the specificity of the parent antibody and one of these exhibited binding properties
comparable to the corresponding murine Fab fragments with the affinity in nM range. Our monovalent antibody fragments are
of special interest in view of possible therapeutic reagents for prion diseases as well as for development of a new generation
of diagnostics. 相似文献