全文获取类型
收费全文 | 2968篇 |
免费 | 230篇 |
国内免费 | 1篇 |
专业分类
3199篇 |
出版年
2023年 | 18篇 |
2022年 | 28篇 |
2021年 | 56篇 |
2020年 | 34篇 |
2019年 | 39篇 |
2018年 | 60篇 |
2017年 | 49篇 |
2016年 | 73篇 |
2015年 | 175篇 |
2014年 | 171篇 |
2013年 | 217篇 |
2012年 | 271篇 |
2011年 | 246篇 |
2010年 | 149篇 |
2009年 | 121篇 |
2008年 | 196篇 |
2007年 | 179篇 |
2006年 | 175篇 |
2005年 | 151篇 |
2004年 | 140篇 |
2003年 | 112篇 |
2002年 | 115篇 |
2001年 | 33篇 |
2000年 | 30篇 |
1999年 | 33篇 |
1998年 | 43篇 |
1997年 | 21篇 |
1996年 | 18篇 |
1995年 | 20篇 |
1994年 | 28篇 |
1993年 | 20篇 |
1992年 | 19篇 |
1991年 | 17篇 |
1990年 | 11篇 |
1989年 | 24篇 |
1988年 | 4篇 |
1987年 | 19篇 |
1986年 | 8篇 |
1985年 | 5篇 |
1984年 | 5篇 |
1983年 | 7篇 |
1982年 | 6篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 6篇 |
1978年 | 4篇 |
1976年 | 3篇 |
1964年 | 3篇 |
1940年 | 2篇 |
1912年 | 2篇 |
排序方式: 共有3199条查询结果,搜索用时 0 毫秒
41.
Jeemeng Lao Ai Oikawa Jennifer R. Bromley Peter McInerney Anongpat Suttangkakul Andreia M. Smith‐Moritz Hector Plahar Tsan‐Yu Chiu Susana M. González Fernández‐Niño Berit Ebert Fan Yang Katy M. Christiansen Sara F. Hansen Solomon Stonebloom Paul D. Adams Pamela C. Ronald Nathan J. Hillson Masood Z. Hadi Miguel E. Vega‐Sánchez Dominique Loqué Henrik V. Scheller Joshua L. Heazlewood 《The Plant journal : for cell and molecular biology》2014,79(3):517-529
The glycosyltransferases (GTs) are an important and functionally diverse family of enzymes involved in glycan and glycoside biosynthesis. Plants have evolved large families of GTs which undertake the array of glycosylation reactions that occur during plant development and growth. Based on the Carbohydrate‐Active enZymes (CAZy) database, the genome of the reference plant Arabidopsis thaliana codes for over 450 GTs, while the rice genome (Oryza sativa) contains over 600 members. Collectively, GTs from these reference plants can be classified into over 40 distinct GT families. Although these enzymes are involved in many important plant specific processes such as cell‐wall and secondary metabolite biosynthesis, few have been functionally characterized. We have sought to develop a plant GTs clone resource that will enable functional genomic approaches to be undertaken by the plant research community. In total, 403 (88%) of CAZy defined Arabidopsis GTs have been cloned, while 96 (15%) of the GTs coded by rice have been cloned. The collection resulted in the update of a number of Arabidopsis GT gene models. The clones represent full‐length coding sequences without termination codons and are Gateway® compatible. To demonstrate the utility of this JBEI GT Collection, a set of efficient particle bombardment plasmids (pBullet) was also constructed with markers for the endomembrane. The utility of the pBullet collection was demonstrated by localizing all members of the Arabidopsis GT14 family to the Golgi apparatus or the endoplasmic reticulum (ER). Updates to these resources are available at the JBEI GT Collection website http://www.addgene.org/ . 相似文献
42.
43.
Hansen Joan H. Skov Christian Baktoft Henrik Brönmark Christer Chapman Ben B. Hulthén Kaj Hansson Lars-Anders Nilsson P. Anders Brodersen Jakob 《Ecosystems》2020,23(2):292-306
Ecosystems - Patterns of animal migration and the ecological forces that shape them have been studied for centuries. Yet ecological impacts caused by the migration, such as altered... 相似文献
44.
45.
Amy E. Zanne Kessy Abarenkov Michelle E. Afkhami Carlos A. Aguilar‐Trigueros Scott Bates Jennifer M. Bhatnagar Posy E. Busby Natalie Christian William K. Cornwell Thomas W. Crowther Habacuc Flores‐Moreno Dimitrios Floudas Romina Gazis David Hibbett Peter Kennedy Daniel L. Lindner Daniel S. Maynard Amy M. Milo Rolf Henrik Nilsson Jeff Powell Mark Schildhauer Jonathan Schilling Kathleen K. Treseder 《Biological reviews of the Cambridge Philosophical Society》2020,95(2):409-433
Fungi play many essential roles in ecosystems. They facilitate plant access to nutrients and water, serve as decay agents that cycle carbon and nutrients through the soil, water and atmosphere, and are major regulators of macro‐organismal populations. Although technological advances are improving the detection and identification of fungi, there still exist key gaps in our ecological knowledge of this kingdom, especially related to function . Trait‐based approaches have been instrumental in strengthening our understanding of plant functional ecology and, as such, provide excellent models for deepening our understanding of fungal functional ecology in ways that complement insights gained from traditional and ‐omics‐based techniques. In this review, we synthesize current knowledge of fungal functional ecology, taxonomy and systematics and introduce a novel database of fungal functional traits (FunFun). FunFun is built to interface with other databases to explore and predict how fungal functional diversity varies by taxonomy, guild, and other evolutionary or ecological grouping variables. To highlight how a quantitative trait‐based approach can provide new insights, we describe multiple targeted examples and end by suggesting next steps in the rapidly growing field of fungal functional ecology. 相似文献
46.
Henrik Gislason Jeremy Collie Brian R. MacKenzie Anders Nielsen Maria de Fatima Borges Teresa Bottari Corina Chaves Andrey V. Dolgov Jakov Dul
i Daniel Duplisea Heino O. Fock Didier Gascuel Luís Gil de Sola Jan Geert Hiddink Remment ter Hofstede Igor Isajlovi Jnas Pll Jonasson Ole Jrgensen Kristjn Kristinsson Gudrun Marteinsdottir Hicham Masski Sanja Mati‐Skoko Mark R. Payne Melita Peharda Jakup Reinert Jn Slmundsson Cristina Silva Lilja Stefansdottir Francisco Velasco Nedo Vrgo
《Global Ecology and Biogeography》2020,29(5):842-856
47.
Ingerid J. Hagen Sigbjrn Lien Anna M. Billing Tore O. Elgvin Cassandra Trier Alina K. Niskanen Maja Tarka Jon Slate Glenn‐Peter Stre Henrik Jensen 《Molecular ecology resources》2020,20(2):544-559
The house sparrow is an important model species for studying physiological, ecological and evolutionary processes in wild populations. Here, we present a medium density, genome wide linkage map for house sparrow (Passer domesticus) that has aided the assembly of the house sparrow reference genome, and that will provide an important resource for ongoing mapping of genes controlling important traits in the ecology and evolution of this species. Using a custom house sparrow 10 K iSelect Illumina SNP chip we have assigned 6,498 SNPs to 29 autosomal linkage groups, based on a mean of 430 informative meioses per SNP. The map was constructed by combining the information from linkage with that of the physical position of SNPs within scaffold sequences in an iterative process. Averaged between the sexes; the linkage map had a total length of 2,004 cM, with a longer map for females (2,240 cM) than males (1,801 cM). Additionally, recombination rates also varied along the chromosomes. Comparison of the linkage map to the reference genomes of zebra finch, collared flycatcher and chicken, showed a chromosome fusion of the two avian chromosomes 8 and 4A in house sparrow. Lastly, information from the linkage map was utilized to conduct analysis of linkage disequilibrium (LD) in eight populations with different effective population sizes (Ne) in order to quantify the background level LD. Together, these results aid the design of future association studies, facilitate the development of new genomic tools and support the body of research that describes the evolution of the avian genome. 相似文献
48.
Vollset Knut Wiik Lennox Robert J. Thorstad Eva B. Auer Samuel Bär Kerstin Larsen Martin H. Mahlum Shad Näslund Joacim Stryhn Henrik Dohoo Ian 《Reviews in Fish Biology and Fisheries》2020,30(4):553-568
Reviews in Fish Biology and Fisheries - A systematic review and meta-analysis was conducted to evaluate the appropriate tag:fish size ratio when tagging juvenile salmonids (genera Oncorhynchus,... 相似文献
49.
Amino Acids - Solid-phase synthesis of cyclic, branched or side-chain-modified peptides typically involves introduction of a residue carrying a temporary side-chain protecting group that undergoes... 相似文献
50.