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101.
Mark C. Ball Richard Pither Micheline Manseau Jeff Clark Stephen D. Petersen Steve Kingston Natasha Morrill Paul Wilson 《Conservation Genetics》2007,8(3):577-586
Faecal material has increasingly become an important non-invasive source of DNA for wildlife population genetics. However,
DNA from faecal sources can have issues associated with quantity (low-template and/or low target-to-total DNA ratio) and quality (degradation and/or low DNA-to-inhibitor ratio). A number of studies utilizing faecal material assume
and compensate for the above properties with minimal characterization of quantity or quality of target DNA, which can unnecessarily increase the risk of downstream technical problems. Here, we present a protocol which quantifies
faecal DNA using a two step approach: (1) estimating total DNA concentration using a PicogreenTM fluorescence assay and (2) estimating target nuclear DNA concentration by comparing amplification products of field samples at suspected concentrations to those of control
DNA at known concentrations. We applied this protocol to faecal material collected in the field from two species: woodland
caribou (Rangifer tarandus) and swift fox (Vulpes velox). Total DNA estimates ranged from 6.5 ng/μl to 28.6 ng/μl (X = 16.2 ng/μl) for the caribou extracts and 1.0–26.1 ng/μl (X = 7.5 ng/μl) for the swift fox extracts. Our results showed high concordance between total and target DNA estimates from woodland caribou faecal extracts, with only 10% of the samples showing relatively lower target-to-total DNA ratios. In contrast, DNA extracts from swift fox scat exhibited low target DNA yields, with only 38% (19 of 50) of the samples showing comparative target DNA amplification of at least 0.1 ng. With this information, we were able to estimate the amount of target DNA entered into PCR amplifications, and identify samples having target DNA below a lower threshold of 0.2 ng and requiring modification to genotyping protocols such as multiple tube amplification.
Our results here also show that this approach can easily be adapted to other species where faeces are the primary source of
DNA template. 相似文献
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Leigh‐Ann Woolley Hayley M. Geyle Brett P. Murphy Sarah M. Legge Russell Palmer Christopher R. Dickman John Augusteyn Sarah Comer Tim S. Doherty Charlie Eager Glenn Edwards Dan K.P. Harley Ian Leiper Peter J. McDonald Hugh W. McGregor Katherine E. Moseby Cecilia Myers John L. Read Joanna Riley Danielle Stokeld Jeff M. Turpin John C.Z. Woinarski 《Mammal Review》2019,49(4):354-368
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105.
Adrienne H K Roeder Marisa S Otegui Ram Dixit Charles T Anderson Christine Faulkner Yan Zhang Maria J Harrison Charlotte Kirchhelle Gohta Goshima Jeremy E Coate Jeff J Doyle Olivier Hamant Keiko Sugimoto Liam Dolan Heather Meyer David W Ehrhardt Arezki Boudaoud Carlos Messina 《The Plant cell》2022,34(1):72
As scientists, we are at least as excited about the open questions—the things we do not know—as the discoveries. Here, we asked 15 experts to describe the most compelling open questions in plant cell biology. These are their questions: How are organelle identity, domains, and boundaries maintained under the continuous flux of vesicle trafficking and membrane remodeling? Is the plant cortical microtubule cytoskeleton a mechanosensory apparatus? How are the cellular pathways of cell wall synthesis, assembly, modification, and integrity sensing linked in plants? Why do plasmodesmata open and close? Is there retrograde signaling from vacuoles to the nucleus? How do root cells accommodate fungal endosymbionts? What is the role of cell edges in plant morphogenesis? How is the cell division site determined? What are the emergent effects of polyploidy on the biology of the cell, and how are any such “rules” conditioned by cell type? Can mechanical forces trigger new cell fates in plants? How does a single differentiated somatic cell reprogram and gain pluripotency? How does polarity develop de-novo in isolated plant cells? What is the spectrum of cellular functions for membraneless organelles and intrinsically disordered proteins? How do plants deal with internal noise? How does order emerge in cells and propagate to organs and organisms from complex dynamical processes? We hope you find the discussions of these questions thought provoking and inspiring.We asked 15 experts to address what they consider to be the most compelling open questions in plant cell biology and these are their questions. 相似文献
106.
Antonio Garrido Montalban Erik Boman Chau-Dung Chang Susana Conde Ceide Russell Dahl David Dalesandro Nancy G.J. Delaet Eric Erb Justin T. Ernst Andrew Gibbs Jeffrey Kahl Linda Kessler Jeff Kucharski Christopher Lum Jan Lundström Stephen Miller Hiroshi Nakanishi Edward Roberts Eddine Saiah Robert Sullivan Christopher J. Larson 《Bioorganic & medicinal chemistry letters》2010,20(16):4819-4824
We have optimized a novel series of potent p38 MAP kinase inhibitors based on an α-ketoamide scaffold through structure based design that due to their extended molecular architecture bind, in addition to the ATP site, to an allosteric pocket. In vitro ADME, in vivo PK and efficacy studies show these compounds to have drug-like characteristics and have resulted in the nomination of a development candidate which is currently in phase II clinical trials for the oral treatment of inflammatory conditions. 相似文献
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Frost D Way H Howles P Luck J Manners J Hardham A Finnegan J Ellis J 《Molecular plant-microbe interactions : MPMI》2004,17(2):224-232
Tobacco was transformed with three different alleles (L2, L6, and L10) of the flax rust resistance gene L, a member of the toll interleukin-1 receptor, nucleotide-binding site, leucine-rich repeat (TIR-NBS-LRR) class of plant disease resistance genes. L6 transgenics had a stunted phenotype, expressed several defense response genes constitutively, and had increased resistance to the fungus Cercospora nicotianae and the oomycete Phytophthora parasitica pv. nicotianae. L2 and L10 transgenics, with one exception for L10, did not express these phenotypes, indicating that the activation of tobacco defense responses is L6 allele-specific. The phenotype of the exceptional L10 transgenic plant was associated with the presence of a truncated L10 gene resulting from an aberrant T-DNA integration. The truncated gene consisted of the promoter, the complete TIR region, and 39 codons of the NBS domain fused inframe to a tobacco retrotransposon-like sequence. A similar truncated L10 gene, constructed in vitro, was transiently expressed in tobacco leaves and gave rise to a strong localized necrotic reaction. Together, these results suggest that defense signaling properties of resistance genes can be expressed in an allele-specific and pathogen-independent manner when transferred between plant genera. 相似文献