全文获取类型
收费全文 | 416篇 |
免费 | 10篇 |
出版年
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 6篇 |
2018年 | 10篇 |
2017年 | 14篇 |
2016年 | 4篇 |
2015年 | 11篇 |
2014年 | 6篇 |
2013年 | 8篇 |
2012年 | 17篇 |
2011年 | 20篇 |
2010年 | 14篇 |
2009年 | 10篇 |
2008年 | 19篇 |
2007年 | 9篇 |
2006年 | 9篇 |
2005年 | 12篇 |
2004年 | 11篇 |
2003年 | 14篇 |
2002年 | 10篇 |
2001年 | 21篇 |
2000年 | 10篇 |
1999年 | 9篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1993年 | 5篇 |
1992年 | 7篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 9篇 |
1988年 | 16篇 |
1987年 | 5篇 |
1986年 | 9篇 |
1985年 | 4篇 |
1984年 | 6篇 |
1982年 | 6篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 7篇 |
1976年 | 5篇 |
1975年 | 3篇 |
1974年 | 4篇 |
1973年 | 6篇 |
1972年 | 7篇 |
1971年 | 8篇 |
1970年 | 7篇 |
1969年 | 4篇 |
1965年 | 2篇 |
排序方式: 共有426条查询结果,搜索用时 375 毫秒
91.
Leonov AV Gusev VV Gerasimov VN 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》2006,(7):94-97
Results of study of capsule formation and immunologic properties of capsular antigen of attenuated strain LA-25 of Pasteurella multocida grown on liquid medium from non-food materials and Hottinger's broth depending on cultivation time are presented. 相似文献
92.
Bauer S Gusev BI Pivina LM Apsalikov KN Grosche B 《Radiatsionnaia biologiia, radioecologiia / Rossi?skaia akademiia nauk》2006,46(5):611-618
This paper describes the Semipalatinsk historical cohort study and, in particular, examines the association between combined external and internal radiation exposure and esophagus cancer. Esophagus cancer is the most frequent single cancer site in the cause of death follow-up for the Semipalatinsk cohort. Set up in the 1960s, this historical cohort included 10 exposed settlements in the vicinity of the Semipalatinsk nuclear test site in East Kazakhstan as well as 6 comparison settlements in a low exposure area of the same region. The external and internal radiation doses to the population of the settlements under study were mainly due to local fallout from atmospheric nuclear testing (1949-1962). The database includes dosimetry and health information for 19.545 inhabitants of exposed and comparison villages in the Semipalatinsk region, comprising a total of 582.750 person-years of follow-up between 1960 and 1999. Cumulative effective dose estimates in this cohort range from 20 mSv to -4 Sv, with a mean dose of 634 mSv in the exposed group. Relative risks were calculated in terms of rate ratios, using a Poisson regression model for grouped person-time data. Esophagus cancer was found substantially elevated, with a statistically significant increase of the relative risk with dose and an ERR/Sv of 2.37 (1.45; 3.28) for the total cohort. If the data set was restricted to the exposed group only, the ERR/Sv was found considerably lower (0.18 (-0.16; 0.52)), whereas the dose-response remained significant only in women. Overall, our results based on the Semipalatinsk historical cohort indicate an association between fallout exposure and the risk of esophagus cancer that should be further investigated. 相似文献
93.
94.
95.
The recently published review by Dreiza et al. (Cell Stress and Chaperones DOI ) dealing with the functional role of HSPB6 in muscle regulation is critically analyzed. Published data indicate that the
chaperone-like activity of HSPB6 is comparable with that of HSPB5 and that phosphorylation of HSPB6 does not affect its oligomeric
structure. Different hypotheses concerning the molecular mechanisms of HSPB6 action on smooth muscle contraction and on the
reorganization of the cytoskeleton are compared, and it is concluded that although HSPB6 is not a genuine actin-binding protein,
it can affect the actin cytoskeleton indirectly. Phosphorylated HSPB6 interacts with 14-3-3 and thereby displaces other binding
partners of 14-3-3; among them, certain phosphatases, protein kinases, and various actin-binding proteins, which can participate
in the reorganization of the actin cytoskeleton. In addition, HSPB6 seems to regulate the activity of certain protein kinases.
All of these processes are dependent on HSPB6 phosphorylation which in turn might be regulated by the formation of heterooligomeric
complexes of HSPB6 with other small heat shock proteins. 相似文献
96.
Evgeny V. Mymrikov Olesya V. Bukach Alim S. Seit-Nebi Nikolai B. Gusev 《Cell stress & chaperones》2010,15(4):365-377
Human αB-crystallin and small heat shock proteins HspB6 and HspB8 were mutated so that all endogenous Cys residues were replaced
by Ser and the single Cys residue was inserted in a position homologous to that of Cys137 of human HspB1, i.e. in a position
presumably located in the central part of β7 strand of the α-crystallin domain. The secondary, tertiary, and quaternary structures
of thus obtained Cys-mutants as well as their chaperone-like activity were similar to those of their wild-type counterparts.
Mild oxidation of Cys-mutants leads to formation of disulfide bond crosslinking neighboring monomers thus indicating participation
of the β7 strand in intersubunit interaction. Oxidation weakly affects the secondary and tertiary structure, does not affect
the quaternary structure of αB-crystallin and HspB6, and shifts equilibrium between monomer and dimer of HspB8 towards dimer
formation. It is concluded that the β7 strand participates in the intersubunit interaction of four human small heat shock
proteins (αB-crystallin, HspB1, HspB6, HspB8) having different structure of β2 strand of α-crystallin domain and different
length and composition of variable N- and C-terminal tails. 相似文献
97.
Richard Cornette Yasushi Kanamori Masahiko Watanabe Yuichi Nakahara Oleg Gusev Kanako Mitsumasu Keiko Kadono-Okuda Michihiko Shimomura Kazuei Mita Takahiro Kikawada Takashi Okuda 《The Journal of biological chemistry》2010,285(46):35889-35899
Some organisms are able to survive the loss of almost all their body water content, entering a latent state known as anhydrobiosis. The sleeping chironomid (Polypedilum vanderplanki) lives in the semi-arid regions of Africa, and its larvae can survive desiccation in an anhydrobiotic form during the dry season. To unveil the molecular mechanisms of this resistance to desiccation, an anhydrobiosis-related Expressed Sequence Tag (EST) database was obtained from the sequences of three cDNA libraries constructed from P. vanderplanki larvae after 0, 12, and 36 h of desiccation. The database contained 15,056 ESTs distributed into 4,807 UniGene clusters. ESTs were classified according to gene ontology categories, and putative expression patterns were deduced for all clusters on the basis of the number of clones in each library; expression patterns were confirmed by real-time PCR for selected genes. Among up-regulated genes, antioxidants, late embryogenesis abundant (LEA) proteins, and heat shock proteins (Hsps) were identified as important groups for anhydrobiosis. Genes related to trehalose metabolism and various transporters were also strongly induced by desiccation. Those results suggest that the oxidative stress response plays a central role in successful anhydrobiosis. Similarly, protein denaturation and aggregation may be prevented by marked up-regulation of Hsps and the anhydrobiosis-specific LEA proteins. A third major feature is the predicted increase in trehalose synthesis and in the expression of various transporter proteins allowing the distribution of trehalose and other solutes to all tissues. 相似文献
98.
99.
The dynamics of spontaneous mutagenesis in a population of heterotrophic microorganisms during incubation in the absence of organic substrate was studied. A model of this dynamics was proposed. which is determined by the excitation by an external electromagnetic field of Langmuir proton oscillations activating the tautomeric transitions of nucleotides of DNA. It was shown that the model fits well the experimental data. 相似文献
100.
The store-operated calcium entry pathways in human carcinoma A431 cells: functional properties and activation mechanisms 总被引:3,自引:0,他引:3
Gusev K Glouchankova L Zubov A Kaznacheyeva E Wang Z Bezprozvanny I Mozhayeva GN 《The Journal of general physiology》2003,122(1):81-94
Activation of phospholipase C (PLC)-mediated signaling pathways in nonexcitable cells causes the release of Ca2+ from intracellular Ca2+ stores and activation of Ca2+ influx across the plasma membrane. Two types of Ca2+ channels, highly Ca2+-selective ICRAC and moderately Ca2+-selective ISOC, support store-operated Ca2+ entry process. In previous patch-clamp experiments with a human carcinoma A431 cell line we described store-operated Imin/ICRACL plasma membrane Ca2+ influx channels. In the present paper we use whole-cell and single-channel recordings to further characterize store-operated Ca2+ influx pathways in A431 cells. We discovered that (a) ICRAC and ISOC are present in A431 cells; (b) ICRAC currents are highly selective for divalent cations and fully activate within 150 s after initiation of Ca2+ store depletion; (c) ISOC currents are moderately selective for divalent cations (PBa/PCs = 14.5) and require at least 300 s for full activation; (d) ICRAC and ISOC currents are activated by PLC-coupled receptor agonists; (e) ISOC currents are supported by Imin/ICRACL channels that display 8.5-10 pS conductance for sodium; (f) ICRAC single channel conductance for sodium is estimated at 0.9 pS by the noise analysis; (g) Imin/ICRACL channels are activated in excised patches by an amino-terminal fragment of InsP3R1 (InsP3R1N); and (h) InsP3 binding to InsP3R1N is necessary for activation of Imin/ICRACL channels. Our findings provide novel information about store-operated Ca2+ influx pathways in A431 cells. 相似文献