全文获取类型
收费全文 | 14496篇 |
免费 | 620篇 |
国内免费 | 5178篇 |
专业分类
安全科学 | 1030篇 |
废物处理 | 907篇 |
环保管理 | 1105篇 |
综合类 | 8177篇 |
基础理论 | 2339篇 |
环境理论 | 6篇 |
污染及防治 | 4955篇 |
评价与监测 | 583篇 |
社会与环境 | 550篇 |
灾害及防治 | 642篇 |
出版年
2024年 | 8篇 |
2023年 | 253篇 |
2022年 | 685篇 |
2021年 | 607篇 |
2020年 | 455篇 |
2019年 | 417篇 |
2018年 | 544篇 |
2017年 | 676篇 |
2016年 | 605篇 |
2015年 | 821篇 |
2014年 | 1131篇 |
2013年 | 1434篇 |
2012年 | 1203篇 |
2011年 | 1385篇 |
2010年 | 990篇 |
2009年 | 975篇 |
2008年 | 1048篇 |
2007年 | 816篇 |
2006年 | 792篇 |
2005年 | 562篇 |
2004年 | 403篇 |
2003年 | 508篇 |
2002年 | 461篇 |
2001年 | 392篇 |
2000年 | 399篇 |
1999年 | 447篇 |
1998年 | 375篇 |
1997年 | 351篇 |
1996年 | 344篇 |
1995年 | 294篇 |
1994年 | 214篇 |
1993年 | 177篇 |
1992年 | 129篇 |
1991年 | 101篇 |
1990年 | 71篇 |
1989年 | 59篇 |
1988年 | 52篇 |
1987年 | 23篇 |
1986年 | 25篇 |
1985年 | 11篇 |
1984年 | 13篇 |
1983年 | 11篇 |
1982年 | 13篇 |
1981年 | 4篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Ma Huimin Di Danyang Li Lin Zhang Wei Wang Jianmei 《Environmental geochemistry and health》2022,44(9):2905-2918
Environmental Geochemistry and Health - Effective supply of environmental public services (EPS) is important to guarantee the mitigation of residential pollution exposure risk. This study analyzes... 相似文献
2.
Mao Haobo Zhang Yingyi Wang Hong Cui Kunkun Yu Laihao Tan Tianbiao 《Environmental Chemistry Letters》2023,21(3):1659-1672
Environmental Chemistry Letters - Huge amounts of unwanted sewage sludge are generated in the process of wastewater treatment, calling for methods to recycle sewage sludges into value-added... 相似文献
3.
Chunyan Wang Jiangshan Wang Yi Liu Lei Zhang Yong Sun Jiuhui Qu 《Frontiers of Environmental Science & Engineering》2021,15(5):110
4.
Yuqing Xu Zedong Lu Wenjun Sun Xiaohui Zhang 《Frontiers of Environmental Science & Engineering》2021,15(6):131
5.
Diversity of antibiotic resistance genes and encoding ribosomal protection proteins gene in livestock waste polluted environment 总被引:1,自引:0,他引:1
Chunyan Li Cheng Jiang Zhiyang Wu Xuejiao An Hailan Wang 《Journal of environmental science and health. Part. B》2018,53(7):423-433
The rapid development and increase of antibiotic resistance are global phenomena resulting from the extensive use of antibiotics in human clinics and animal feeding operations. Antibiotics can promote the occurrence of antibiotic resistance genes (ARGs), which can be transferred horizontally to humans and animals through water and the food chain. In this study, the presence and abundance of ARGs in livestock waste was monitored by quantitative PCR. A diverse set of bacteria and tetracycline resistance genes encoding ribosomal protection proteins (RPPs) from three livestock farms and a river were analyzed through denaturing gradient gel electrophoresis (DGGE). The abundance of sul(I) was 103 to 105 orders of magnitude higher than that of sul(II). Among 11 tet-ARGs, the most abundant was tet(O). The results regarding bacterial diversity indicated that the presence of antibiotics might have an evident impact on bacterial diversity at every site, particularly at the investigated swine producer. The effect of livestock waste on the bacterial diversity of soil was stronger than that of water. Furthermore, a sequencing analysis showed that tet(M) exhibited two genotypes, while the other RPPs-encoding genes exhibited at least three genotypes. This study showed that various ARGs and RPPs-encoding genes are particularly widespread among livestock. 相似文献
6.
Channa argus, a type of snakehead fish native to China, is a popular food fish in certain Asian countries but is a known destructive invasive species in the US. In this study, the two collagens, i.e. acid-soluble collagen (ASC) and pepsin-solubilized collagen (PSC), were obtained from C. argus skin. The yield of ASC was 28.0% and that of PSC was 16.8% on the dry bases. The collagens were identified as the collagen of type I by SDS–PAGE patterns. The Tds were approximately 27.0?°C. Similar ultraviolet spectra of both collagens were observed. Fourier Transform infrared spectra indicated PSC structure had a little change due to the loss of terminal domains by pepsin digestion. The results of XRD proved that the two collagens retained their helical structures. The results suggest that the collagens isolated from C. argus can potentially be alternative sources of vertebrate collagens for use in the food and other industries. 相似文献
7.
Chaojin Jiang Xiaoqian Jiang Lixun Zhang Yuntao Guan 《Frontiers of Environmental Science & Engineering》2020,14(3):47
8.
Xinjie Wang Yang Li Jian Zhao Hong Yao Siqi Chu Zimu Song Zongxian He Wen Zhang 《Frontiers of Environmental Science & Engineering》2020,14(4):56
9.
Chen Cheng Haodong Li Jinling Wang Hualin Wang Xuejing Yang 《Frontiers of Environmental Science & Engineering》2020,14(5):87
10.
Hu Qili Zhang Zhenya 《Environmental science and pollution research international》2020,27(35):43865-43869
Environmental Science and Pollution Research - Besides adsorption rate constant, the half-life was also a basic factor that described the characteristics of adsorption kinetics. However, the direct... 相似文献