全文获取类型
收费全文 | 255篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 13篇 |
环保管理 | 13篇 |
综合类 | 78篇 |
基础理论 | 60篇 |
污染及防治 | 64篇 |
评价与监测 | 12篇 |
社会与环境 | 10篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 8篇 |
2022年 | 6篇 |
2021年 | 12篇 |
2020年 | 6篇 |
2019年 | 4篇 |
2018年 | 11篇 |
2017年 | 6篇 |
2016年 | 12篇 |
2015年 | 14篇 |
2014年 | 25篇 |
2013年 | 23篇 |
2012年 | 18篇 |
2011年 | 8篇 |
2010年 | 11篇 |
2009年 | 13篇 |
2008年 | 15篇 |
2007年 | 16篇 |
2006年 | 17篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 4篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1993年 | 2篇 |
排序方式: 共有257条查询结果,搜索用时 421 毫秒
231.
232.
Francesca Romana Grati Denise Molina Gomes Jose Carlos Pinto B. Ferreira Celine Dupont Viola Alesi Laetitia Gouas Nina Horelli-Kuitunen Kwong Wai Choy Sandra García-Herrero Alberto Gonzalez de la Vega Krzysztof Piotrowski Rita Genesio Gloria Queipo Barbara Malvestiti Bérénice Hervé Brigitte Benzacken Antonio Novelli Philippe Vago Kirsi Piippo Tak Yeung Leung Federico Maggi Thibault Quibel Anne Claude Tabet Giuseppe Simoni François Vialard 《黑龙江环境通报》2015,35(8):801-809
233.
234.
235.
236.
The diagnosis of chromosomal mosaicism in the preimplantation and prenatal stage is fraught with uncertainty and multiple factors need to be considered in order to gauge the likely impact. The clinical effects of chromosomal mosaicism are directly linked to the type of the imbalance (size, gene content, and copy number), the timing of the initial event leading to mosaicism during embryogenesis/fetal development, the distribution of the abnormal cells throughout the various tissues within the body as well as the ratio of normal/abnormal cells within each of those tissues. Additional factors such as assay noise and culture artifacts also have an impact on the significance and management of mosaic cases. Genetic counseling is an important part of educating patients about the likelihood of having a liveborn with a chromosome abnormality and these risks differ according to the time of ascertainment and the tissue where the mosaic cells were initially discovered. Each situation needs to be assessed on a case-by-case basis and counseled accordingly. This review will discuss the clinical impact of finding mosaicism through: embryo biopsy, chorionic villus sampling, amniocentesis, and noninvasive prenatal testing using cell-free DNA. 相似文献
237.
238.
Philip DeKoninck Julio Jimenez Francesca M. Russo Ryan Hodges Eduard Gratacós Jan Deprest 《黑龙江环境通报》2014,34(10):977-981
239.
Matthew F. Sledge Francesca Boscaro Stefano Turillazzi 《Behavioral ecology and sociobiology》2001,49(5):401-409
Most species of social insect are characterized by a reproductive division of labor among morphologically specialized individuals. In contrast, there exist many species where all individuals are morphologically identical and dominance relationships determine which individuals mate and/or reproduce. In newly founded multiple-foundress associations of the social wasp Polistes dominulus, foundresses establish dominance hierarchies where the top-ranked (alpha) female monopolizes egg laying. The possibility that chemical cues are used for recognition of egg-laying individuals has not been explored in this wasp. Using non-destructive techniques, we examined the relationship between ovarian activity and the proportions of cuticular hydrocarbons of three female types (dominant and subordinate foundresses and workers) in 11 colonies. Immediately after nest foundation, no differences were found between alpha and subordinate females. In contrast, at worker emergence, alpha females were statistically distinguishable from both subordinates and workers. We experimentally removed the alpha female in 5 of the original nests and reanalyzed hydrocarbon proportions of the new dominant individual. Replacement individuals were all found to acquire a cuticular signature characteristic of the alpha female. This suggests that cuticular hydrocarbons are used as cues of ovarian activity in P. dominulus, and we discuss our results in terms of a switch from behavioral dominance to chemical signaling in this wasp. 相似文献
240.
The present study was aimed at the reclamation of harbour sediments contaminated with butyltin compounds (BTCs) by means of biostimulation and/or bioaugmentation experiments carried out in a 5-L slurry bioreactor. In the biostimulation experiment with inorganic nutrients, almost 50% of TBT was degraded in 20 weeks. In the bioaugmentation experiment with a microbial consortium, no significant degradation of TBT was observed. Conversely, bioaugmentation combined with biostimulation led to a decrease of ~50% in TBT after four weeks. A simple kinetic model fitted to the experimental data of BTC concentration allowed us to estimate that 10 weeks are needed to decrease BTC contamination by 90% using a strategy based on both biostimulation and bioaugmentation, and 29 weeks for a strategy using biostimulation only. Overall, our study indicates that strategies based on biostimulation coupled to bioaugmentation can be effective in significantly reducing the concentration of BTCs over relatively short timescales. 相似文献