全文获取类型
收费全文 | 2264篇 |
免费 | 326篇 |
专业分类
2590篇 |
出版年
2022年 | 15篇 |
2021年 | 23篇 |
2018年 | 14篇 |
2017年 | 24篇 |
2016年 | 34篇 |
2015年 | 72篇 |
2014年 | 77篇 |
2013年 | 113篇 |
2012年 | 110篇 |
2011年 | 99篇 |
2010年 | 76篇 |
2009年 | 56篇 |
2008年 | 99篇 |
2007年 | 98篇 |
2006年 | 96篇 |
2005年 | 75篇 |
2004年 | 83篇 |
2003年 | 88篇 |
2002年 | 90篇 |
2001年 | 75篇 |
2000年 | 62篇 |
1999年 | 58篇 |
1998年 | 24篇 |
1997年 | 30篇 |
1996年 | 27篇 |
1995年 | 28篇 |
1994年 | 33篇 |
1993年 | 28篇 |
1992年 | 68篇 |
1991年 | 50篇 |
1990年 | 59篇 |
1989年 | 65篇 |
1988年 | 47篇 |
1987年 | 44篇 |
1986年 | 37篇 |
1985年 | 40篇 |
1984年 | 41篇 |
1983年 | 24篇 |
1982年 | 17篇 |
1981年 | 26篇 |
1980年 | 23篇 |
1979年 | 21篇 |
1978年 | 23篇 |
1977年 | 25篇 |
1976年 | 20篇 |
1975年 | 16篇 |
1974年 | 30篇 |
1973年 | 14篇 |
1972年 | 22篇 |
1969年 | 14篇 |
排序方式: 共有2590条查询结果,搜索用时 15 毫秒
1.
The Wageningen Delivery of Functionality symposium covered all aspects involved with food structural design to arrive at high-quality
foods which meet demanding customer expectations and regulatory requirements. The symposium integrated aspects from the structural
organization of foods at molecular and supramolecular scales to dedicated techniques required to describe and visualize such
structures, the gastro-intestinal events and how to model these in a laboratory setting, and finally the impact those food
structures and ingredients have on the consumer’s physiology and on the human perception. As an interdisciplinary platform,
bringing together more than 160 researchers from academia and industry, the symposium meanwhile fulfills an important role
in the food science community. 相似文献
2.
3.
SUMMARY: MIAH is a WWW server for the automatic alignment of new eukaryotic SSU rRNA sequences to an existing alignment of 1500 sequences. AVAILABILITY: http://chah.ucc.ie/MIAH Contact : 相似文献
4.
Stability and degradation of mRNA 总被引:13,自引:0,他引:13
Christopher F. Higgins 《Current opinion in cell biology》1991,3(6):1013-1018
Differential mRNA stability plays an important role in the regulation of gene expression. Several recent advances have helped to define the general pathways by which mRNA is degraded in prokaryotic cells, although many details remain to be elucidated. Much less is known about the pathways of degradation in eukaryotic cells, but recent studies on specific systems have highlighted both differences from and similarities to prokaryotic pathways. 相似文献
5.
6.
Ian Higgins 《BMJ (Clinical research ed.)》1988,297(6664):1704
7.
Steven I. Higgins Robert B. O’Hara Olga Bykova Michael D. Cramer Isabelle Chuine Eva‐Maria Gerstner Thomas Hickler Xavier Morin Michael R. Kearney Guy F. Midgley Simon Scheiter 《Journal of Biogeography》2012,39(12):2132-2145
Aim To develop a physiologically based model of the plant niche for use in species distribution modelling. Location Europe. Methods We link the Thornley transport resistance (TTR) model with functions which describe how the TTR’s model parameters are influenced by abiotic environmental factors. The TTR model considers how carbon and nutrient uptake, and the allocation of these assimilates, influence growth. We use indirect statistical methods to estimate the model parameters from a high resolution data set on tree distribution for 22 European tree species. Results We infer, from distribution data and abiotic forcing data, the physiological niche dimensions of 22 European tree species. We found that the model fits were reasonable (AUC: 0.79–0.964). The projected distributions were characterized by a false positive rate of 0.19 and a false negative rate 0.12. The fitted models are used to generate projections of the environmental factors that limit the range boundaries of the study species. Main conclusions We show that physiological models can be used to derive physiological niche dimensions from species distribution data. Future work should focus on including prior information on physiological rates into the parameter estimation process. Application of the TTR model to species distribution modelling suggests new avenues for establishing explicit links between distribution and physiology, and for generating hypotheses about how ecophysiological processes influence the distribution of plants. 相似文献
8.
9.
M. J. Higgins D. Loiselle T. A. Haystead L. M. Graves 《Nucleosides, nucleotides & nucleic acids》2013,32(6-7):850-857
We investigated the interacting proteins and intracellular localization of CTP synthetase 1 (CTPS1) in mammalian cells. CTPS1 interacted with a GST- peptidyl prolyl isomerase, Pin1 fusion (GST-Pin1) in a Ser 575 (S575) phosphorylation-dependent manner. Immunoprecipitation experiments demonstrated that CTPS1 also bound tubulin, and thirteen additional coimmunoprecipitating proteins were identified by mass spectrometry. Immunolocalization experiments showed that tubulin and CTPS1 colocalized subcellularly. Taxol treatment enhanced this but cotreatment of cells with the CTPS inhibitor, cyclopentenyl cytosine (CPEC), and taxol failed to disrupt the colocalization. Thus, these studies provide novel information on the potential interacting proteins that may regulate CTPS1 function or intracellular localization. 相似文献
10.
This paper describes a generic algorithm for finding restrictionsites within DNA sequences. The genericity ofthe algorithm is made possible through the use of set theory.Basic elements of DNA sequences, i.e. nucleotides (bases), arerepresented in sets, and DNA sequences, whether specific, ambiguousor even protein-coding, are represented as sequences of thosesets. The set intersection operation demonstrates its abilityto perform pattern-matching correctly on various DNA sequences.The performance analysis showed that the degree of complexityof the pattern matching is reduced from exponential to linear.An example is given to show the actual and potential restrictionsites, derived by the generic algorithm, in the DNA sequencetemplate coding for a synthetic calmodulin.
Received on October 2, 1990; accepted on December 18, 1990 相似文献