全文获取类型
收费全文 | 2226篇 |
免费 | 23篇 |
国内免费 | 15篇 |
专业分类
安全科学 | 63篇 |
废物处理 | 163篇 |
环保管理 | 172篇 |
综合类 | 211篇 |
基础理论 | 456篇 |
环境理论 | 3篇 |
污染及防治 | 830篇 |
评价与监测 | 214篇 |
社会与环境 | 143篇 |
灾害及防治 | 9篇 |
出版年
2023年 | 20篇 |
2022年 | 82篇 |
2021年 | 67篇 |
2020年 | 40篇 |
2019年 | 50篇 |
2018年 | 75篇 |
2017年 | 84篇 |
2016年 | 113篇 |
2015年 | 74篇 |
2014年 | 128篇 |
2013年 | 211篇 |
2012年 | 155篇 |
2011年 | 190篇 |
2010年 | 123篇 |
2009年 | 102篇 |
2008年 | 113篇 |
2007年 | 141篇 |
2006年 | 102篇 |
2005年 | 74篇 |
2004年 | 65篇 |
2003年 | 52篇 |
2002年 | 60篇 |
2001年 | 30篇 |
2000年 | 24篇 |
1999年 | 20篇 |
1998年 | 12篇 |
1997年 | 6篇 |
1996年 | 9篇 |
1995年 | 11篇 |
1994年 | 6篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 3篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1983年 | 1篇 |
1979年 | 1篇 |
1967年 | 2篇 |
1964年 | 1篇 |
1958年 | 1篇 |
1956年 | 1篇 |
1915年 | 1篇 |
排序方式: 共有2264条查询结果,搜索用时 62 毫秒
21.
The presence and characteristics of a membrane-bound adenylate cyclase from Mytilus galloprovincialis Lmk posterior adductor muscle have been investigated. The enzyme has a Michaelis constant (K
m) of 0.38 mM at 20°C and requires divalent cations (Mg2+/Mn2+) for its activity. Optimal GTP concentrations are between 10-5 and 10-4
M. The non-hydrolizable GTP-analogues GMPpNHp and GTPS increase the activity of the enzyme four- to ten-fold. Sodium fluoride stimulates the enzymatic activity seven- to eight-fold. Forskolin increases the enzymatic activity two- to three-fold. Serotonin stimulates the adenylate cyclase activity in a dose-dependent manner. These experiments were performed with mussels collected from the estuary of Muros, Spain, in 1990. 相似文献
22.
23.
Molinos-Senante María Porcher Simon Maziotis Alexandros 《Environmental science and pollution research international》2017,24(20):16994-17005
Environmental Science and Pollution Research - The assessment of productivity change over time and its drivers is of great significance for water companies and regulators when setting urban water... 相似文献
24.
Priscila H. Palharim Ctia A. L. Graa Antonio C. S. C. Teixeira 《Environmental science and pollution research international》2020,27(18):22214-22224
Conventional wastewater treatments are not efficient in removing parabens, which may thus end up in surface waters, posing a threat to aquatic biota and hu 相似文献
25.
Ana María Plata-Díaz José Luis Zafra-Gómez Gemma Pérez-López Antonio Manuel López-Hernández 《Waste management (New York, N.Y.)》2014,34(11):1967-1976
Identifying and characterising the factors that determine why a local authority opts for a particular way of managing its waste collection service is an important issue, warranting research interest in the field of municipal solid waste (MSW) management. This paper presents empirical evidence spanning a broad time horizon (2002–2010) showing that economic and political factors impact in different ways on the provision of waste management services. We examine five alternatives in this area, including public and private service delivery formulas and, within each field, individual and joint options. Our findings highlight the importance of the service cost and that of the various indicators of fiscal stress as determinant factors of management decisions regarding the provision of MSW management services. 相似文献
26.
Mao‐Ning Tuanmu Andrés Viña Wu Yang Xiaodong Chen Ashton M. Shortridge Jianguo Liu 《Conservation biology》2016,30(4):827-835
Conflicts between local people's livelihoods and conservation have led to many unsuccessful conservation efforts and have stimulated debates on policies that might simultaneously promote sustainable management of protected areas and improve the living conditions of local people. Many government‐sponsored payments‐for‐ecosystem‐services (PES) schemes have been implemented around the world. However, few empirical assessments of their effectiveness have been conducted, and even fewer assessments have directly measured their effects on ecosystem services. We conducted an empirical and spatially explicit assessment of the conservation effectiveness of one of the world's largest PES programs through the use of a long‐term empirical data set, a satellite‐based habitat model, and spatial autoregressive analyses on direct measures of change in an ecosystem service (i.e., the provision of wildlife species habitat). Giant panda (Ailuropoda melanoleuca) habitat improved in Wolong Nature Reserve of China after the implementation of the Natural Forest Conservation Program. The improvement was more pronounced in areas monitored by local residents than those monitored by the local government, but only when a higher payment was provided. Our results suggest that the effectiveness of a PES program depends on who receives the payment and on whether the payment provides sufficient incentives. As engagement of local residents has not been incorporated in many conservation strategies elsewhere in China or around the world, our results also suggest that using an incentive‐based strategy as a complement to command‐and‐control, community‐ and norm‐based strategies may help achieve greater conservation effectiveness and provide a potential solution for the park versus people conflict. 相似文献
27.
de la Flor María Patricia Camarillo Rafael Martínez Fabiola Jiménez Carlos Quiles Rafael Rincón Jesusa 《Environmental science and pollution research international》2021,28(19):23720-23730
Environmental Science and Pollution Research - For the photocatalytic degradation of antioxidant 2,6-di-tert-butyl-hydroxytoluene (BHT), several TiO2-based composites have been prepared in MWCNT... 相似文献
28.
Gómez-Tolosa María Rivera-Velázquez Gustavo Rioja-Paradela Tamara M. Mendoza-Cuenca Luis F. Tejeda-Cruz César López Sergio 《Environmental science and pollution research international》2021,28(2):1381-1396
Environmental Science and Pollution Research - The order Odonata has been regularly used as an indicator of the ecosystem’s condition. The objective of this review was to analyze the... 相似文献
29.
Macías-Vargas José-Alberto Campos-Mañas Marina Celia Agüera Ana Sánchez Pérez José Antonio Ramírez-Zamora Rosa-María 《Environmental science and pollution research international》2021,28(19):24008-24022
Environmental Science and Pollution Research - In this work, the activated persulfate oxidation of ciprofloxacin (CIP) using a low-grade titanium ore under sunlight or simulated sunlight were... 相似文献
30.
Lara-Ramos Jose Antonio Constain-Escobar Angela María Rojas-Ortiz Karen Vanessa Diaz-Angulo Jennyfer Machuca-Martínez Fiderman 《Environmental science and pollution research international》2021,28(19):24079-24091
Environmental Science and Pollution Research - This work proposes a novel approach for the coupling of ozonation and Fenton processes using a new prototype of a high rotation bubble reactor (HRBR),... 相似文献