全文获取类型
收费全文 | 969篇 |
免费 | 11篇 |
国内免费 | 6篇 |
专业分类
安全科学 | 18篇 |
废物处理 | 61篇 |
环保管理 | 55篇 |
综合类 | 182篇 |
基础理论 | 161篇 |
污染及防治 | 334篇 |
评价与监测 | 109篇 |
社会与环境 | 60篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 14篇 |
2022年 | 36篇 |
2021年 | 43篇 |
2020年 | 18篇 |
2019年 | 18篇 |
2018年 | 51篇 |
2017年 | 34篇 |
2016年 | 60篇 |
2015年 | 49篇 |
2014年 | 52篇 |
2013年 | 80篇 |
2012年 | 39篇 |
2011年 | 67篇 |
2010年 | 51篇 |
2009年 | 27篇 |
2008年 | 65篇 |
2007年 | 53篇 |
2006年 | 44篇 |
2005年 | 30篇 |
2004年 | 23篇 |
2003年 | 27篇 |
2002年 | 23篇 |
2001年 | 18篇 |
2000年 | 12篇 |
1999年 | 3篇 |
1998年 | 3篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 8篇 |
1993年 | 5篇 |
1992年 | 4篇 |
1990年 | 3篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1964年 | 1篇 |
1962年 | 1篇 |
排序方式: 共有986条查询结果,搜索用时 31 毫秒
121.
122.
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
123.
124.
125.
126.
127.
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
128.
129.
The present work presents a study of the biological treatment of fish processing wastewater at salt concentration of 55 g/L. Wastewater was treated by both continuous stirred-tank reactor (CSTR) and membrane bioreactor (MBR) during 50 and 100 days, respectively. These biological processes involved salt-tolerant bacteria from natural hypersaline environments at different organic loading rates (OLRs). The phylogenetic analysis of the corresponding excised DGGE bands has demonstrated that the taxonomic affiliation of the most dominant species includes Halomonadaceae and Flavobacteriaceae families of the Proteobacteria (Gamma-proteobacteria class) and the Bacteroidetes phyla, respectively. The results of MBR were better than those of CSTR in the removal of total organic carbon with efficiencies from 97.9% to 98.6%. Nevertheless, salinity with increasing OLR aggravates fouling that requires more cleaning for a membrane in MBR while leads to deterioration of sludge settleability and effluent quality in CSTR. 相似文献
130.