全文获取类型
收费全文 | 9395篇 |
免费 | 674篇 |
国内免费 | 2篇 |
出版年
2024年 | 5篇 |
2023年 | 47篇 |
2022年 | 112篇 |
2021年 | 222篇 |
2020年 | 135篇 |
2019年 | 176篇 |
2018年 | 231篇 |
2017年 | 193篇 |
2016年 | 315篇 |
2015年 | 507篇 |
2014年 | 587篇 |
2013年 | 691篇 |
2012年 | 839篇 |
2011年 | 855篇 |
2010年 | 562篇 |
2009年 | 442篇 |
2008年 | 561篇 |
2007年 | 570篇 |
2006年 | 496篇 |
2005年 | 505篇 |
2004年 | 426篇 |
2003年 | 404篇 |
2002年 | 348篇 |
2001年 | 82篇 |
2000年 | 59篇 |
1999年 | 86篇 |
1998年 | 90篇 |
1997年 | 64篇 |
1996年 | 55篇 |
1995年 | 58篇 |
1994年 | 47篇 |
1993年 | 43篇 |
1992年 | 29篇 |
1991年 | 27篇 |
1990年 | 28篇 |
1989年 | 19篇 |
1988年 | 13篇 |
1987年 | 13篇 |
1986年 | 13篇 |
1985年 | 11篇 |
1984年 | 17篇 |
1983年 | 16篇 |
1982年 | 15篇 |
1981年 | 13篇 |
1980年 | 6篇 |
1979年 | 5篇 |
1978年 | 8篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
111.
Loss of function of Arabidopsis NADP‐malic enzyme 1 results in enhanced tolerance to aluminum stress
112.
Eric Dumonteil Henry Pronovost Eli F. Bierman Anna Sanford Alicia Majeau Ryan Moore Claudia Herrera 《Molecular ecology》2020,29(19):3747-3761
Integrating how biodiversity and infectious disease dynamics are linked at multiple levels and scales is highly challenging. Chagas disease is a vector‐borne disease, with specificities of the triatomine vectors and Trypanosoma cruzi parasite life histories resulting in a complex multihost and multistrain life cycle. Here, we tested the hypothesis that T. cruzi transmission cycles are shaped by triatomine host communities and gut microbiota composition by comparing the integrated interactions of Triatoma sanguisuga in southern Louisiana with feeding hosts, T. cruzi parasite and bacterial microbiota in two habitats. Bugs were collected from resident's houses and animal shelters and analysed for genetic structure, blood feeding sources, T. cruzi parasites, and bacterial diversity by PCR amplification of specific DNA markers followed by next‐generation sequencing, in an integrative metabarcoding approach. T. sanguisuga feeding host communities appeared opportunistic and defined by host abundance in each habitat, yielding distinct parasite transmission networks among hosts. The circulation of a large diversity of T. cruzi DTUs was also detected, with TcII and TcV detected for the first time in triatomines in the US. The bacterial microbiota was highly diverse and varied significantly according to the DTU infecting the bugs, indicating specific interactions among them in the gut. Expanding such studies to multiple habitats and additional triatomine species would be key to further refine our understanding of the complex life cycles of multihost, multistrain parasites such as T. cruzi, and may lead to improved disease control strategies. 相似文献
113.
Peña Claudia Civit Bárbara Gallego-Schmid Alejandro Druckman Angela Pires Armando Caldeira- Weidema Bo Mieras Eric Wang Feng Fava Jim Canals Llorenç Milà i Cordella Mauro Arbuckle Peter Valdivia Sonia Fallaha Sophie Motta Wladmir 《The International Journal of Life Cycle Assessment》2021,26(2):215-220
The International Journal of Life Cycle Assessment - The current global interest in circular economy (CE) opens an opportunity to make society’s consumption and production patterns more... 相似文献
114.
115.
116.
117.
118.
119.
Hydrobiologia - Mussels provide important ecological functions in freshwater ecosystems but the associations between Amazonian mussels, macroinvertebrate assemblage and habitat quality remain... 相似文献
120.
Xue Bessie Su Menglu Wang Claudia Schaffner Olga O. Nerusheva Dean Clift Christos Spanos David A. Kelly Michael Tatham Andreas Wallek Yehui Wu Juri Rappsilber A. Arockia Jeyaprakash Zuzana Storchova Ronald T. Hay Adle L. Marston 《The Journal of cell biology》2021,220(7)
During mitosis, sister chromatids attach to microtubules from opposite poles, called biorientation. Sister chromatid cohesion resists microtubule forces, generating tension, which provides the signal that biorientation has occurred. How tension silences the surveillance pathways that prevent cell cycle progression and correct erroneous kinetochore–microtubule attachments remains unclear. Here we show that SUMOylation dampens error correction to allow stable sister kinetochore biorientation and timely anaphase onset. The Siz1/Siz2 SUMO ligases modify the pericentromere-localized shugoshin (Sgo1) protein before its tension-dependent release from chromatin. Sgo1 SUMOylation reduces its binding to protein phosphatase 2A (PP2A), and weakening of this interaction is important for stable biorientation. Unstable biorientation in SUMO-deficient cells is associated with persistence of the chromosome passenger complex (CPC) at centromeres, and SUMOylation of CPC subunit Bir1 also contributes to timely anaphase onset. We propose that SUMOylation acts in a combinatorial manner to facilitate dismantling of the error correction machinery within pericentromeres and thereby sharpen the metaphase–anaphase transition. 相似文献