全文获取类型
收费全文 | 2342篇 |
免费 | 290篇 |
国内免费 | 811篇 |
专业分类
安全科学 | 250篇 |
废物处理 | 90篇 |
环保管理 | 182篇 |
综合类 | 1674篇 |
基础理论 | 307篇 |
污染及防治 | 484篇 |
评价与监测 | 158篇 |
社会与环境 | 203篇 |
灾害及防治 | 95篇 |
出版年
2024年 | 13篇 |
2023年 | 64篇 |
2022年 | 171篇 |
2021年 | 149篇 |
2020年 | 150篇 |
2019年 | 102篇 |
2018年 | 97篇 |
2017年 | 125篇 |
2016年 | 119篇 |
2015年 | 135篇 |
2014年 | 168篇 |
2013年 | 219篇 |
2012年 | 200篇 |
2011年 | 190篇 |
2010年 | 167篇 |
2009年 | 164篇 |
2008年 | 162篇 |
2007年 | 159篇 |
2006年 | 199篇 |
2005年 | 142篇 |
2004年 | 86篇 |
2003年 | 78篇 |
2002年 | 66篇 |
2001年 | 46篇 |
2000年 | 56篇 |
1999年 | 39篇 |
1998年 | 21篇 |
1997年 | 25篇 |
1996年 | 27篇 |
1995年 | 16篇 |
1994年 | 26篇 |
1993年 | 19篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1982年 | 3篇 |
排序方式: 共有3443条查询结果,搜索用时 296 毫秒
761.
纳米二氧化硅表面改性及其对阿维菌素吸附和缓释性能 总被引:2,自引:0,他引:2
以纳米SiO2为原材料,采用硅烷偶联剂KH-570对其进行表面改性,制备了具有疏水性的改性纳米SiO2,通过SEM、IR光谱分析以及元素分析,探讨了纳米SiO2改性后的形貌结构变化,以及其对阿维菌素的吸附和缓释性能.结果表明,经过硅烷偶联剂改性后的纳米SiO2分散性和亲油性都有了较好的改善,在乙醇中对阿维菌素的吸附率从13.98%提高到31.36%,并对阿维菌素具有较好的缓释效果,在溶出介质中对阿维菌素的控制释放时间可以持续80 h,所以,经硅烷偶联剂改性后的纳米SiO2可以作为疏水性药物的控释载体. 相似文献
762.
A signal-amplified mercury sensing biosensor with desired sensitivity was developed through firstly using the GFP mutant with fluorescence increasing response towards Hg2+ as the reporter module. The developed biosensor showed response for Hg2+ in a relatively wide range of 1–10,000 nmol/L, and the detection limit was improved one or two orders of magnitude in comparison with most metal-sensing biosensors in similar constructs. In addition, the biosensor could distinguish Hg2+ easily from multiple metal ions and displayed strong adaptability to extensive pH conditions (pH 4.0–10.0). More importantly, the developed biosensor was able to provide an initial assessment of Hg2+ spiked in the environmental water with the recoveries between 85.70% and 112.50%. The signal-amplified strategy performed by the modified reporter module will be widely applicable to many other whole-cell biosensors, meeting the practical requirements with sufficient sensing performance. 相似文献
763.
764.
765.
Chen Xiao-Fan Lin Zhi-Cheng Qi Zenghua Cai Zongwei Chen Zhi-Feng 《Environmental Chemistry Letters》2023,21(2):1177-1201
Environmental Chemistry Letters - The eyes of aquatic organisms may be damaged by exposure to pollutants. Zebrafish is a common laboratory model to study ocular toxicity, combining both fish and... 相似文献
766.
Huang He Chen Jianqing Sun Qi Liu Yuhao Tang You Teng Xiaohua 《Environmental science and pollution research international》2021,28(9):10898-10908
Environmental Science and Pollution Research - Lead (Pb) is a kind of widespread toxic environmental pollutant which can cause harm to organisms. Selenium (Se) has the property of mitigating Pb... 相似文献
767.
Di Shanshan Diao Jinling Wang Xiangyun Qi Peipei Wang Zhiwei Xu Hao Zhang Hu Wang Xinquan Han Jiajun 《Environmental science and pollution research international》2019,26(10):9500-9507
Environmental Science and Pollution Research - Sediments are reservoirs and sources of DDTs to the aquatic ecosystem. However, the role of sediment particulate matter and benthic organisms in... 相似文献
768.
Huang Xianfeng Wang Xiran Guan Dong-Xing Zhou Huabin Bei Ke Zheng Xiangyong Jin Zhan Zhang Yejian Wang Qi Zhao Min 《Environmental science and pollution research international》2019,26(9):8516-8524
Environmental Science and Pollution Research - Most prevailing processes are incapable of removing Cr(III)-organic complexes efficiently and facing the problem of in-process formation of highly... 相似文献
769.
770.
In the construction industry, contractors have been facing the challenge to meet the emerging needs related to the reduction of environmental impacts during the construction process. Generally, the commitment of efforts and resources from contractors to meet these needs is motivated by the influence exerted from environmental regulations and stakeholder demands. However, managerial environmental concerns and size of firms also account as key factors affecting the adoption of green construction practices. Therefore, the aim of this research is to identify those factors influencing contractors to adopt green construction practices by using data gathered from a survey. From the results, it has been found that managerial concern is the most important driver for the adoption of green practices. Significant relationships have also been found between government regulations and business size with the adoption of green construction practices. However, there is no significant evidence on the relationship among the adoption of green construction practices with perceived stakeholders’ pressures. The findings from this study are significant in the understanding on the factors of green construction management. This knowledge may contribute to better decision-making towards implementing green construction practices. 相似文献