全文获取类型
收费全文 | 155篇 |
免费 | 19篇 |
专业分类
174篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 5篇 |
2020年 | 2篇 |
2019年 | 10篇 |
2018年 | 5篇 |
2017年 | 6篇 |
2016年 | 7篇 |
2015年 | 9篇 |
2014年 | 14篇 |
2013年 | 8篇 |
2012年 | 16篇 |
2011年 | 12篇 |
2010年 | 16篇 |
2009年 | 3篇 |
2008年 | 8篇 |
2007年 | 5篇 |
2006年 | 5篇 |
2005年 | 5篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 4篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 2篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有174条查询结果,搜索用时 15 毫秒
81.
Jean-Marc Thibaud 《法国昆虫学会纪事》2013,49(2):181-185
Synthesis and new data on interstitial Collembola-fauna in littoral and continental sand sediments. Collembola biodiversity in supralitoral and inland sands can not be compared to the biodiversity developed in mineral soils or leaf litter, and Collembola biodiversity in intertidal sands is lower. The problem of the dispersial of these littoral sand Collembola is considered. A number of species appear have a trans-oceanic dispersal on considerable distances on or in sea water. 相似文献
82.
David Porco Dariusz Skarżyński Thibaud Decaëns Paul D. N. Hebert Louis Deharveng 《Molecular ecology resources》2014,14(2):249-261
Although their functional importance in ecosystems is increasingly recognized, soil‐dwelling micro‐arthropods are usually poorly known in comparison with their above‐ground counterparts. Collembola constitute a significant and species‐rich component of the soil biodiversity, but it remains a woefully understudied group because of the taxonomic impediment. The ever‐increasing use of molecular taxonomic tools, such as DNA barcoding, provides a possible solution. Here, we test the use of this approach through a diversity survey of Collembola from the vicinity of Churchill, Manitoba, Canada, and compare the results with previous surveys in the same area and in other sub‐Arctic regions. The systematic barcoding campaign at Churchill revealed a diverse collembolan fauna consisting of 97 species‐level MOTUs in six types of habitats. If all these MOTUs are confirmed as species, this richness would be far higher than prior records for Arctic Canada and could lead to reconsider the actual diversity of the group in Arctic environments. 相似文献
83.
84.
85.
86.
Flavio Ronzoni Thibaud Magouroux Remi Vernet Jér?me Extermann Darragh Crotty Adriele Prina-Mello Daniel Ciepielewski Yuri Volkov Luigi Bonacina Jean-Pierre Wolf Marisa Jaconi 《Journal of visualized experiments : JoVE》2014,(87)
In this visualized experiment, protocol details are provided for in vitro labeling of human embryonic stem cells (hESC) with second harmonic generation nanoparticles (HNPs). The latter are a new family of probes recently introduced for labeling biological samples for multi-photon imaging. HNPs are capable of doubling the frequency of excitation light by the nonlinear optical process of second harmonic generation with no restriction on the excitation wavelength.Multi-photon based methodologies for hESC differentiation into cardiac clusters (maintained as long term air-liquid cultures) are presented in detail. In particular, evidence on how to maximize the intense second harmonic (SH) emission of isolated HNPs during 3D monitoring of beating cardiac tissue in 3D is shown. The analysis of the resulting images to retrieve 3D displacement patterns is also detailed. 相似文献
87.
Marie Maurer Jér?me Mary Laurent Guillaud Marilyn Fender Manuel Pelé Thomas Bilzer Natasha Olby Jacques Penderis G. Diane Shelton Jean-Jacques Panthier Jean-Laurent Thibaud Inès Barthélémy Geneviève Aubin-Houzelstein Stéphane Blot Christophe Hitte Laurent Tiret 《PloS one》2012,7(10)
Centronuclear myopathies (CNM) are inherited congenital disorders characterized by an excessive number of internalized nuclei. In humans, CNM results from ∼70 mutations in three major genes from the myotubularin, dynamin and amphiphysin families. Analysis of animal models with altered expression of these genes revealed common defects in all forms of CNM, paving the way for unified pathogenic and therapeutic mechanisms. Despite these efforts, some CNM cases remain genetically unresolved. We previously identified an autosomal recessive form of CNM in French Labrador retrievers from an experimental pedigree, and showed that a loss-of-function mutation in the protein tyrosine phosphatase-like A (PTPLA) gene segregated with CNM. Around the world, client-owned Labrador retrievers with a similar clinical presentation and histopathological changes in muscle biopsies have been described. We hypothesized that these Labradors share the same PTPLAcnm mutation. Genotyping of an international panel of 7,426 Labradors led to the identification of PTPLAcnm carriers in 13 countries. Haplotype analysis demonstrated that the PTPLAcnm allele resulted from a single and recent mutational event that may have rapidly disseminated through the extensive use of popular sires. PTPLA-deficient Labradors will help define the integrated role of PTPLA in the existing CNM gene network. They will be valuable complementary large animal models to test innovative therapies in CNM. 相似文献
88.
89.
Deborah V. Hoyle Marianne Keith Helen Williamson Kareen Macleod Heather Mathie Ian Handel Carol Currie Anne Holmes Lesley Allison Rebecca McLean Rebecca Callaby Thibaud Porphyre Sue C. Tongue Madeleine K. Henry Judith Evans George J. Gunn David L. Gally Nuno Silva Margo E. Chase-Topping 《Applied and environmental microbiology》2021,87(10)
90.
The Saturniidae of Barro Colorado Island,Panama: A model taxon for studying the long‐term effects of climate change? 下载免费PDF全文
Yves Basset Greg P.A. Lamarre Tom Ratz Simon T. Segar Thibaud Decaëns Rodolphe Rougerie Scott E. Miller Filonila Perez Ricardo Bobadilla Yacksecari Lopez José Alejandro Ramirez Annette Aiello Héctor Barrios 《Ecology and evolution》2017,7(23):9991-10004
We have little knowledge of the response of invertebrate assemblages to climate change in tropical ecosystems, and few studies have compiled long‐term data on invertebrates from tropical rainforests. We provide an updated list of the 72 species of Saturniidae moths collected on Barro Colorado Island (BCI), Panama, during the period 1958‐2016. This list will serve as baseline data for assessing long‐term changes of saturniids on BCI in the future, as 81% of the species can be identified by their unique DNA Barcode Index Number, including four cryptic species not yet formally described. A local species pool of 60 + species breeding on BCI appears plausible, but more cryptic species may be discovered in the future. We use monitoring data obtained by light trapping to analyze recent population trends on BCI for saturniid species that were relatively common during 2009‐2016, a period representing >30 saturniid generations. The abundances of 11 species, of 14 tested, could be fitted to significant time‐series models. While the direction of change in abundance was uncertain for most species, two species showed a significant increase over time, and forecast models also suggested continuing increases for most species during 2017‐2018, as compared to the 2009 base year. Peaks in saturniid abundance were most conspicuous during El Niño and La Niña years. In addition to a species‐specific approach, we propose a reproducible functional classification based on five functional traits to analyze the responses of species sharing similar functional attributes in a fluctuating climate. Our results suggest that the abundances of larger body‐size species with good dispersal abilities may increase concomitantly with rising air temperature in the future, because short‐lived adults may allocate less time to increasing body temperature for flight, leaving more time available for searching for mating partners or suitable oviposition sites. 相似文献