全文获取类型
收费全文 | 90602篇 |
免费 | 1222篇 |
国内免费 | 1099篇 |
专业分类
安全科学 | 3744篇 |
废物处理 | 3315篇 |
环保管理 | 13940篇 |
综合类 | 21045篇 |
基础理论 | 26228篇 |
环境理论 | 71篇 |
污染及防治 | 14970篇 |
评价与监测 | 5449篇 |
社会与环境 | 3613篇 |
灾害及防治 | 548篇 |
出版年
2022年 | 793篇 |
2021年 | 802篇 |
2020年 | 646篇 |
2019年 | 859篇 |
2018年 | 1127篇 |
2017年 | 1153篇 |
2016年 | 2166篇 |
2015年 | 1827篇 |
2014年 | 2583篇 |
2013年 | 9235篇 |
2012年 | 2211篇 |
2011年 | 2453篇 |
2010年 | 3245篇 |
2009年 | 3398篇 |
2008年 | 2032篇 |
2007年 | 1875篇 |
2006年 | 2303篇 |
2005年 | 2275篇 |
2004年 | 2601篇 |
2003年 | 2432篇 |
2002年 | 1976篇 |
2001年 | 2287篇 |
2000年 | 2023篇 |
1999年 | 1495篇 |
1998年 | 1365篇 |
1997年 | 1352篇 |
1996年 | 1479篇 |
1995年 | 1573篇 |
1994年 | 1459篇 |
1993年 | 1327篇 |
1992年 | 1305篇 |
1991年 | 1283篇 |
1990年 | 1228篇 |
1989年 | 1198篇 |
1988年 | 1042篇 |
1987年 | 985篇 |
1986年 | 988篇 |
1985年 | 1061篇 |
1984年 | 1161篇 |
1983年 | 1166篇 |
1982年 | 1170篇 |
1981年 | 1100篇 |
1980年 | 942篇 |
1979年 | 932篇 |
1978年 | 819篇 |
1977年 | 721篇 |
1976年 | 643篇 |
1975年 | 604篇 |
1973年 | 638篇 |
1972年 | 640篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
1.
Russian Journal of Ecology - The dynamics of the species richness, breeding density, and structure of the community of birds occupying nest-boxes upon a 50-fold reduction of atmospheric emissions... 相似文献
2.
Babut Marc Marchand Philippe Venisseau Anaïs Veyrand Bruno Ferrari Benoit J. D. 《Environmental science and pollution research international》2021,28(7):7766-7773
Environmental Science and Pollution Research - Legacy (i.e., polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDD)) and alternative halogenated flame retardants (HFRs) were... 相似文献
3.
Carvalho Laíse M. Soares-Filho Antônio F. Lima Maciel S. Cruz-Filho João F. Dantas Taisa C. M. Luz Geraldo E. 《Environmental science and pollution research international》2021,28(7):7774-7785
Environmental Science and Pollution Research - A current environmental problem is the uncontrolled use of various pesticides that are harmful to the environment and public health. The herbicide... 相似文献
4.
Rudra P. Pradhan Mahendhiran S. Nair Mak B. Arvin John H. Hall 《Natural resources forum》2023,47(3):435-483
This article postulates strong endogenous relationships in lower income countries between institutional quality, financial development and sustained economic growth. These associations were investigated using the vector-error correction model (VECM) and Granger causality method for a sample of 79 countries from 2005 to 2022. The findings show that (1) these variables reinforce each other in the short run. (2) In the long run, both institutional quality and financial development can fuel economic growth. (3) The positive effect of institutional quality on economic growth is greater than that of financial development. Policy implications of these findings are that careful attention should be paid to co-development policies to enhance the institutional quality and the financial system in these economies. Policies should also consider economic growth strategies to enable sustainable economic growth rates. 相似文献
5.
Zhu Rong Wang Shixin Srinivasakannan C. Li Shiwei Yin Shaohua Zhang Libo Jiang Xiaobin Zhou Guoli Zhang Ning 《Environmental Chemistry Letters》2023,21(3):1611-1626
Environmental Chemistry Letters - The demand for lithium is growing rapidly with the increase in electric vehicles, batteries and electronic equipments. Lithium can be extracted from brines, yet... 相似文献
6.
Russian Journal of Ecology - In this paper, Ellenberg’s indicator values were estimated in order to soil nitrogen (N), pH (R) and soil moisture (M) in different subalpine grassland... 相似文献
7.
Pradhan Umesh Kumar Ram Anirudh Sahu Balaram P. B. Udayakrishnan Lonkar Saurabh Kumbhar Laxmankumar 《Environmental science and pollution research international》2021,28(36):49725-49742
Environmental Science and Pollution Research - Nutrient source and transport study in tropical creeks adjacent to megacities are sparse on a regional and global scale. High-frequency chemical data... 相似文献
8.
Morsheda Akhter Sagar Kumar Dutta Palash Kumar Dhar Jamil Ahmed Mohammed Nazrul Islam Khan Md. Khairul Amin Jahidul Islam 《环境质量管理》2023,32(4):149-160
Catalytic activity of spinel ferrite in breaking down toxic dye materials are promising due to their uniqueness. In this study, aluminum-doped copper zinc ferrite, Cu0.4Zn0.6-xAlxFe2O4 (x = 0.0, 0.2, 0.4, 0.6), a catalyst for toxic dye degradation is synthesized through chemical co-precipitation route. The formation of the spinel ferrite catalyst is initially confirmed by Fourier transform infrared spectra, which shows the frequency of metal-oxygen bond vibration at 539 and 427 cm−1 attributed to the tetrahedral and octahedral sites respectively. Higher intensity sharp peak of X-ray diffraction for (311) plane is the evidence for the phase purity and the formation of spinel ferrite. The crystallite size is found to decrease with the increase of Al3+ ion. The surface structure of the obtained particles is investigated using a scanning electron microscope. Analyses of the material's magnetic characteristics using a vibrating sample magnetometer (VSM) revealed that it is, in fact, a soft magnet, as evidenced by the loop of its hysteresis, which is narrow. The catalytic degradation of methylene blue dye under the mechanism of the photo-Fenton process is studied with the obtained spinel ferrites and the result is found to be as high as 96.5%. The process follows pseudo-second order kinetics and the Langmuir isotherm. 相似文献
9.
Mughal Nafessa Kashif Maryam Arif Asma Guerrero John William Grimaldo Nabua Wilson C. Niedbała Gniewko 《Environmental science and pollution research international》2021,28(46):65116-65126
Environmental Science and Pollution Research - This study aims to re-examine the impacts of monetary and fiscal policy on environmental quality in ASEAN countries from 1990 to 2019. We utilized the... 相似文献
10.
Russian Journal of Ecology - A new method for assessing the response of biota to climatic changes in the ecosystem has been tested. In the Central Forest Natural Biosphere Reserve, the average... 相似文献