全文获取类型
收费全文 | 531篇 |
免费 | 10篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 10篇 |
环保管理 | 92篇 |
综合类 | 67篇 |
基础理论 | 132篇 |
环境理论 | 12篇 |
污染及防治 | 142篇 |
评价与监测 | 39篇 |
社会与环境 | 39篇 |
出版年
2023年 | 4篇 |
2022年 | 10篇 |
2021年 | 7篇 |
2020年 | 8篇 |
2019年 | 10篇 |
2018年 | 24篇 |
2017年 | 22篇 |
2016年 | 22篇 |
2015年 | 16篇 |
2014年 | 21篇 |
2013年 | 44篇 |
2012年 | 29篇 |
2011年 | 45篇 |
2010年 | 24篇 |
2009年 | 24篇 |
2008年 | 34篇 |
2007年 | 27篇 |
2006年 | 35篇 |
2005年 | 16篇 |
2004年 | 12篇 |
2003年 | 29篇 |
2002年 | 18篇 |
2001年 | 6篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1992年 | 7篇 |
1991年 | 1篇 |
1989年 | 2篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有549条查询结果,搜索用时 109 毫秒
311.
312.
Anneke Roosma Bas Godschalk Reinout Lageman Maurice Henssen Marc Van Bemmel 《补救:环境净化治理成本、技术与工艺杂志》2006,17(1):69-79
A residential area that was formerly part of a silver factory site severely contaminated with chlorinated solvents was remediated using an in situ electro‐bioreclamation technique. Electro‐bioreclamation is a method for heating soil and groundwater combined with soil vapor and low‐yield groundwater extraction and enhanced reductive dechlorination (ERD). During the first two years of remediation in the source area (the intensive phase), a total of 80 kg of volatile organic compounds (VOCs) was removed by heating combined with ERD. After another two years of ERD in the source and plume areas (the attenuation phase), the VOC concentrations were reduced to a level below 100 μg/L in groundwater. Given these satisfying results, electro‐reclamation in combination with ERD turned out to be a successful in situ remediation technique for removing VOCs. © 2006Wiley Periodicals, Inc. 相似文献
313.
Dirk J. Roux Richard T. Kingsford Carly N. Cook Jane Carruthers Katrina Dickson Marc Hockings 《Conservation biology》2019,33(6):1266-1274
Although protected areas represent a pivotal response to escalating anthropogenic threats, they face many pressures, inside and outside their boundaries. Amid these challenges, effective conservation is guided by evidence-based decision making supported by dynamic processes of learning and knowledge exchange. Although different models promote knowledge exchange, embedding research scientists within conservation agencies is best suited to supporting evidence-based conservation. Based on available literature and our experiences on several continents, we considered the benefits, challenges, and opportunities associated with embedding research scientists within conservation agencies and the research required to better understand the effectiveness of the embedding model for evidence-based conservation. Embedded researchers provide long-term commitment to building social capital among academic and nonacademic stakeholders; act as skilled gatekeepers who increase 2-way flow of knowledge between scientists and managers; attract, coordinate, and support management-relevant external research projects; drive the design and maintenance of long-term monitoring; and align their research with information needs. Notwithstanding the many benefits, research capacity of conservation agencies is declining worldwide. A significant challenge is that the values, structures, functions, and effectiveness of the embedding model of knowledge exchange remain poorly evaluated and documented. Also, embedded researchers have to balance their desire for creativity and flexibility with the standardization and quality control required by their public sector agencies; may be perceived as not credible because they are not truly independent of their agency; and have to couple scientific productivity with skills for transdisciplinary research, social facilitation, and stakeholder engagement. Systematic research on embedding and other models of knowledge exchange, across different world contexts, is required to better understand the benefits, costs, and institutional arrangements associated with different models. 相似文献
314.
Airam Rodríguez Nick D. Holmes Peter G. Ryan Kerry‐Jayne Wilson Lucie Faulquier Yovana Murillo André F. Raine Jay F. Penniman Verónica Neves Beneharo Rodríguez Juan J. Negro André Chiaradia Peter Dann Tracy Anderson Benjamin Metzger Masaki Shirai Lorna Deppe Jennifer Wheeler Peter Hodum Catia Gouveia Vanda Carmo Gilberto P. Carreira Luis Delgado‐Alburqueque Carlos Guerra‐Correa François‐Xavier Couzi Marc Travers Matthieu Le Corre 《Conservation biology》2017,31(5):986-1001
Artificial lights at night cause high mortality of seabirds, one of the most endangered groups of birds globally. Fledglings of burrow‐nesting seabirds, and to a lesser extent adults, are attracted to and then grounded (i.e., forced to land) by lights when they fly at night. We reviewed the current state of knowledge of seabird attraction to light to identify information gaps and propose measures to address the problem. Although species in families such as Alcidae and Anatidae can be grounded by artificial light, the most affected seabirds are petrels and shearwaters (Procellariiformes). At least 56 species of Procellariiformes, more than one‐third of them (24) threatened, are subject to grounding by lights. Seabirds grounded by lights have been found worldwide, mainly on oceanic islands but also at some continental locations. Petrel breeding grounds confined to formerly uninhabited islands are particularly at risk from light pollution due to tourism and urban sprawl. Where it is impractical to ban external lights, rescue programs of grounded birds offer the most immediate and employed mitigation to reduce the rate of light‐induced mortality and save thousands of birds every year. These programs also provide useful information for seabird management. However, these data are typically fragmentary, biased, and uncertain and can lead to inaccurate impact estimates and poor understanding of the phenomenon of seabird attraction to lights. We believe the most urgently needed actions to mitigate and understand light‐induced mortality of seabirds are estimation of mortality and effects on populations; determination of threshold light levels and safe distances from light sources; documentation of the fate of rescued birds; improvement of rescue campaigns, particularly in terms of increasing recovery rates and level of care; and research on seabird‐friendly lights to reduce attraction. 相似文献
315.
316.
James E. M. Watson Emily S. Darling Oscar Venter Martine Maron Joe Walston Hugh P. Possingham Nigel Dudley Marc Hockings Megan Barnes Thomas M. Brooks 《Conservation biology》2016,30(2):243-248
Recognizing that protected areas (PAs) are essential for effective biodiversity conservation action, the Convention on Biological Diversity established ambitious PA targets as part of the 2020 Strategic Plan for Biodiversity. Under the strategic goal to “improve the status of biodiversity by safeguarding ecosystems, species, and genetic diversity,” Target 11 aims to put 17% of terrestrial and 10% of marine regions under PA status by 2020. Additionally and crucially, these areas are required to be of particular importance for biodiversity and ecosystem services, effectively and equitably managed, ecologically representative, and well‐connected and to include “other effective area‐based conservation measures” (OECMs). Whereas the area‐based targets are explicit and measurable, the lack of guidance for what constitutes important and representative; effective; and OECMs is affecting how nations are implementing the target. There is a real risk that Target 11 may be achieved in terms of area while failing the overall strategic goal for which it is established because the areas are poorly located, inadequately managed, or based on unjustifiable inclusion of OECMs. We argue that the conservation science community can help establish ecologically sensible PA targets to help prioritize important biodiversity areas and achieve ecological representation; identify clear, comparable performance metrics of ecological effectiveness so progress toward these targets can be assessed; and identify metrics and report on the contribution OECMs make toward the target. By providing ecologically sensible targets and new performance metrics for measuring the effectiveness of both PAs and OECMs, the science community can actively ensure that the achievement of the required area in Target 11 is not simply an end in itself but generates genuine benefits for biodiversity. 相似文献
317.
318.
319.
Braxton Forde Foong-Yen Lim David N. McKinney Mounira Habli Kara B. Markham Mallory Hoffman Sammy Tabbah Marc Oria Jose L. Peiro 《黑龙江环境通报》2023,43(9):1239-1246
Objective
To evaluate the impact of amnioinfusion and other peri-operative factors on pregnancy outcomes in the setting of Twin-twin transfusion syndrome (TTTS) treated via fetoscopic laser photocoagulation (FLP).Methods
Retrospective study of TTTS treated via FLP from 2010 to 2019. Pregnancies were grouped by amnioinfusion volume during FLP (<1 L vs. ≥1 L). The primary outcome was latency from surgery to delivery. An amnioinfusion statistic (AIstat) was created for each surgery based on the volume of fluid infused and removed and the preoperative deepest vertical pocket. Regression analysis was planned to assess the association of AIstat with latency.Results
Patients with amnioinfusion of ≥1 L at the time of FLP had decreased latency from surgery to delivery (61 ± 29.4 vs. 73 ± 28.8 days with amnioinfusion <1 L, p < 0.001) and increased preterm prelabor rupture of membranes (PPROM) <34 weeks (44.7% vs. 33.5%, p = 0.042). Amnioinfusion ≥1 L was associated with an increased risk of delivery <32 weeks (aRR 2.6, 95% CI 1.5–4.5), 30 weeks (aRR 2.4, 95% CI 1.5–3.8), and 28 weeks (aRR 1.9, 95% CI 1.1–2.3). Cox-proportional regression revealed that AIstat was inversely associated with latency (HR 1.1, 95% CI 1.1–1.2).Conclusion
Amnioinfusion ≥1 L during FLP was associated with decreased latency after surgery and increased PPROM <34 weeks. 相似文献320.
Jurado Anna Pujades Estanislao Walther Marc Diaz-Cruz M. Silvia 《Environmental Chemistry Letters》2022,20(5):3313-3333
Environmental Chemistry Letters - Groundwater is the main source of freshwater in the European Union, yet freshwaters are polluted by organic contaminants if contaminants are not efficiently... 相似文献