全文获取类型
收费全文 | 996篇 |
免费 | 12篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 24篇 |
废物处理 | 57篇 |
环保管理 | 69篇 |
综合类 | 192篇 |
基础理论 | 184篇 |
污染及防治 | 314篇 |
评价与监测 | 101篇 |
社会与环境 | 57篇 |
灾害及防治 | 15篇 |
出版年
2023年 | 11篇 |
2022年 | 29篇 |
2021年 | 39篇 |
2020年 | 17篇 |
2019年 | 19篇 |
2018年 | 50篇 |
2017年 | 31篇 |
2016年 | 59篇 |
2015年 | 47篇 |
2014年 | 51篇 |
2013年 | 77篇 |
2012年 | 43篇 |
2011年 | 68篇 |
2010年 | 54篇 |
2009年 | 46篇 |
2008年 | 66篇 |
2007年 | 59篇 |
2006年 | 45篇 |
2005年 | 29篇 |
2004年 | 24篇 |
2003年 | 33篇 |
2002年 | 23篇 |
2001年 | 19篇 |
2000年 | 15篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 6篇 |
1992年 | 5篇 |
1990年 | 3篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1964年 | 1篇 |
1962年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有1013条查询结果,搜索用时 15 毫秒
121.
Brooke E. Willborg Eniola R. Ibirogba Ayssa Teles Abrao Trad Lourenço Sbragia Dean Potter Rodrigo Ruano 《黑龙江环境通报》2021,41(1):159-176
We conducted a comprehensive evidence-based review on the epidemiology and current standard of care of gastroschisis management as well as the pathophysiology, rationale and feasibility of fetal therapy as a viable alternative. Gastroschisis is a periumbilical abdominal wall defect characterized by abdominal viscera herniation in utero. It affects 4 in 10 000 live births, but the prevalence has steadily increased in recent years. Gastroschisis is typically diagnosed on routine second-trimester ultrasound. The overall prognosis is favorable, but complex gastroschisis, which accounts for about 10% to 15% of cases, is associated with a higher mortality, significant disease burden and higher healthcare costs due to long- and short-term complications. The current standard of care has yet to be established but generally involves continued fetal surveillance and multidisciplinary perinatal care. Postnatal surgical repair is achieved with primary closure, staged silo closure or sutureless repair. Experimental animal studies have demonstrated the feasibility of in utero closure, antiinflammatory therapy and prenatal regenerative therapy. However, reports of early preterm delivery and amnioinfusion trials have failed to show any benefit in humans. Further experimental studies and human trials are necessary to demonstrate the potential benefit of fetal therapy in gastroschisis. 相似文献
122.
123.
124.
125.
126.
Ottavia Cavicchioni Denise Molina Gomes Brigitte Leroy François Vialard Yvette Hillion Jacqueline Selva Yves Ville 《黑龙江环境通报》2005,25(10):876-878
We present a case of prenatal diagnosis of a de novo (7;19)(q11.2;q13.3) translocation associated with ultrasound features, including enlarged cisterna magna, normal vermis, thick corpus callosum, micrognathia, small and low-set ears and right hyperechogenic kidney. Karyotyping was performed at 24 weeks of gestation. Termination of pregnancy was accepted at the parents' request. Postmortem examination confirmed the prenatal findings, but revealed bilateral Wilms tumors of the kidneys. Parental karyotype was normal. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
127.
128.
129.
Different water Acts (e.g., the European Water Framework Directive) and stakeholders involved in aquatic affairs have promoted integrated river basin management over recent decades. However, few studies have provided feedback on these policies. The aim of the current article is to fill this gap by exploring how local newspapers reflect the implementation of a broad public participation within a catchment of France known for its innovation with regard to this domain. The media coverage of a water management strategy in the Drôme watershed from 1981 to 2008 was investigated using a content analysis and a geographic information system. We sought to determine what public participation and decentralized decision-making can be in practice. The results showed that this policy was integrated because of its social perspective, the high number of involved stakeholders, the willingness to handle water issues, and the local scale suitable for participation. We emphasized the prominence of the watershed scale guaranteed by the local water authority. This area was also characterized by compromise, arrangements, and power dynamics on a fine scale. We examined the most politically engaged writings regarding water management, which topics of each group emphasized, and how the groups agreed and disagreed on issues based on their values and context. The temporal pattern of participation implementation was progressive but worked by fits and starts. 相似文献