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81.
E. M. Kazin I. A. Sviridova M. G. Berezina A. M. Prokhorova O. A. Komarova L. A. Saval’ A. I. Fedorov Yu. P. Shorin 《Human physiology》2008,34(4):431-439
Analysis of psychological, social, and psychophysiological mechanisms underlying the formation of adaptive responses during puberty demonstrated a significant dependence of adolescent behavioral, autonomic, and endocrine parameters on sociobiological factors that determine the identification and individualization of genetically determined behavioral programs. Comparison of the adaptive capabilities of students from an innovative educational institution and from a vocational school showed that the levels of completeness of their adaptation were different and depended on social support, typological features, and autonomic regulation. 相似文献
82.
G G Konovalova V Z Lankin O A Bogoslovskaia N N Glushchenko Iu I Fedorov 《Biulleten' eksperimental'no? biologii i meditsiny》1989,107(2):154-157
Administration of highly dispersed copper powder in a dose 0.2 mg/kg three days before modelled coronary-occlusion myocardial infarction caused transitory increase in activity of antioxidant enzymes--superoxide dismutase and glutathione peroxidase in the necrotic zone of myocardium of rats, and also staunch increase in the activity of these enzymes in noninfarction region. 相似文献
83.
S V Usova T S Fedorova Iu V Fedorov N B Al'bitskaia 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》1984,(12):89-90
Materials on the study of relationship between the activity of immunoreactive insulin and the degree of an increase in the level of anti-influenza antibodies, induced by vaccine strains, are presented. A short-term decrease in the activity of insulin, more pronounced in donors immunized with adsorbed chemical influenza vaccine, and an increase in the antibody level, mainly in the group of donors receiving killed influenza vaccine, have been noted. 相似文献
84.
V I Fedorov 《Biulleten' eksperimental'no? biologii i meditsiny》1984,97(3):305-307
A study was made of the effect of the parasympathetic agents on renin secretion by rat kidney sections after blockade of alpha- and beta-adrenoreceptors by obsidan and dihydroergotamine. The substances under study were administered at the concentrations 10(-8), 10(-6) or 10(-4) M. Renin activity was determined by radioimmunoassay. n-Cholinomimetics (nicotine, cytiton) were discovered to have a marked inhibitory action on renin secretion, reducing it to almost zero at a concentration of 10(-4) M. n-Cholinolytics (spasmolytin, benzohexonium) produced a dose-dependent stimulation of renin secretion with a 10-20-fold maximal increase. m-Cholinomimetics (aceclidin, proserin) and quateron provoked a 3-5-fold increase in secretion without a dose-dependent effect, whereas galanthamine exerted a negligible effect. Pilocarpine and m-cholinolytics (platyphylline, atropine) reduced the secretion by 2 times without a dose-dependent effect. It is assumed that the renal cortex contains n-cholinoreactive systems that have a direct or mediated action on renin secretion and m-cholinoreactive systems that modulate the activity of the former systems. 相似文献
85.
Flagellin as an object for supramolecular engineering 总被引:1,自引:0,他引:1
A model of tertiary and quaternary structure of E. coli flagellin is suggested. According to this model, the molecule consists of two independent parts. One of them is formed by the N- and C-terminal regions of the polypeptide chain and is responsible for polymerization properties. The other consists of the central region of the polypeptide chain and composes that part of the molecular globule that forms the flagella surface. It is suggested that different artificial supramolecular structures can be constructed from flagellin molecules by varying the surface domain, i.e. the central part of the polypeptide chain, and by using the domain responsible for polymerization properties as a universal block for assembly. The simplest possible artificial supramolecular structures that can be constructed from flagellins of different strains are discussed. 相似文献
86.
87.
Iu Ia Vengerov Iu M Fedorov A A Ivanova L A Abramova I A Kaganovich O A Timasheva V P Popov A A Karduba?lov I M Terskikh 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》1990,(6):39-43
For the first time an outbreak of ornithosis at a textile factory is described. The data on the specific epidemiological features of the outbreak, the specific clinical features of the disease, the results of catamnestic observations and the study of the titers of specific antibodies in the complement fixation test are presented. 相似文献
88.
F.?N.?TomilinEmail author A.?S.?Fedorov P.?V.?Artyushenko S.?G.?Ovchinnikov T.?M.?Ovchinnikova P.?E.?Tsikalova V.?G.?Soukhovolsky 《Journal of molecular modeling》2018,24(11):323
The correlation between the kinetic stability of molecules against temperature and variations in their geometric structure under optical excitation is investigated by the example of different organic pheromone molecules sensitive to temperature or ultraviolet radiation using the density functional theory. The kinetic stability is determined by the previously developed method based on the calculation of the probability of extension of any structural bond by a value exceeding the limit value Lмах corresponding to the breaking of the bond under temperature excitation. The kinetic stability calculation only requires the eigenfrequencies and vibrational mode vectors in the molecule ground state to be calculated, without determining the transition states. The weakest bonds in molecules determined by the kinetic stability method are compared with the bond length variations in molecules in the excited state upon absorption of light by a molecule. Good agreement between the results obtained is demonstrated and the difference between them is discussed. The universality of formulations within both approaches used to estimate the stability of different pheromone molecules containing strained cycles and conjugated, double, and single bonds allows these approaches to be applied for studying other molecules. 相似文献
89.
R. Z. Sabitova O. V. Mukhortova N. Ya. Poddubnaya R. A. Fedorov 《Inland Water Biology》2018,11(2):153-160
The species diversity, abundance, and biomass of zooplankton in the pelagic and coastal zones of Lake Kandrykul were studied in 2007–2012. The community was dominated by large Cladocera. The maximum abundance of zooplankton was observed in the anomalously warm 2010. In July, the highest abundance of zooplankton (1300 thousand ind./m3) was recorded near the southern coast in stands of mare′s-tail Hippurus vulgaris; that of biomass (9 g/m3) was found near the northern shore in stands of narrow-leaved cattail Typha angustifolia. The lowest values of the number and biomass of aquatic invertebrates were observed in the pelagial (32 thousand ind./m3 and 0.1 g/m3) and along the M5 motorway stretching aside the northeastern coast (188 thousand ind./m3 and 0.5 g/m3). The Shannon index value (1.3–2.1) corresponded to the meso-eutrophic type of water bodies. In 2007, according to the Mjaemets trophicity index (E), the lake ecosystem was oligotrophic (E 0.11); in 2010–2012 it was mesotrophic (in the pelagial, E value was 0.54; in the open littoral it was 0.76) or weakly eutrophic (E values of protected littoral were 1.52). The estimates of water trophy as assessed by zooplankton are close to those assessed by the number and biomass of phytoplankton (meso-eutrophic type). The rapid eutrophication of the lake ecosystem was revealed. In 6 years the trophic status of the lake changed from oligo-mesotrophic to meso-eutrophic. 相似文献
90.
Collared lemmings (Dicrostonyx) demonstrate extensive chromosome variation along their circumpolar distribution in the high Arctic. To reveal the history of this genus and the origin of chromosome races in the Palearctic, we studied the geographical pattern of mtDNA variation in lemmings from 13 localities by using eight tetranucleotide restriction enzymes. The main split in mtDNA phylogeny is at the Bering Strait and corresponds to the main chromosome division between the Beringian and the Eurasian groups of karyotypes. Nucleotide divergence estimate of 6.8% suggests that, despite the Bering Land Bridge, Palearctic and Nearctic forms have been separated since the mid-Pleistocene. Five distinct phylogenetic groups of mtDNA haplotypes, with average divergence of 1.5%, corresponding to geographical regions, were found along the Palearctic coast. Low nucleotide and haplotype diversity and a star-like phylogeny within phylogeographical groups of haplotypes suggest regional bottleneck events in the recent past, most probably due to warming events during the Holocene. There is congruence between phylogeographical pattern of mtDNA variation and geographical distribution of chromosome races; 69% of the total mtDNA variation is allocated among chromosome races. This congruence implies that historical events such as fragmentation and allopatric bottleneck events have been important for the origin of chromosome races. However, historical factors do not explain the fixed autosome fusions found to distinguish certain populations. 相似文献