全文获取类型
收费全文 | 109篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 6篇 |
废物处理 | 2篇 |
环保管理 | 15篇 |
综合类 | 9篇 |
基础理论 | 33篇 |
污染及防治 | 25篇 |
评价与监测 | 15篇 |
社会与环境 | 5篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2018年 | 2篇 |
2017年 | 3篇 |
2016年 | 5篇 |
2015年 | 1篇 |
2014年 | 5篇 |
2013年 | 4篇 |
2012年 | 6篇 |
2011年 | 10篇 |
2010年 | 5篇 |
2009年 | 8篇 |
2008年 | 4篇 |
2007年 | 7篇 |
2006年 | 4篇 |
2005年 | 10篇 |
2004年 | 2篇 |
2003年 | 6篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 6篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 2篇 |
1988年 | 1篇 |
1982年 | 2篇 |
1966年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有112条查询结果,搜索用时 281 毫秒
61.
Ellingsen DG Fladseth G Daae HL Gjølstad M Kjaerheim K Skogstad M Olsen R Thorud S Molander P 《Journal of environmental monitoring : JEM》2006,8(3):362-368
The aims were to assess the impact of a total smoking ban on the level of airborne contaminants and the urinary cotinine levels in the employees in bars and restaurants. In a follow up design, 13 bars and restaurants were visited before and after the implementation of a smoking ban. Ninety-three employees in the establishments were initially included into the study. The arithmetic mean concentration of nicotine and total dust declined from 28.3 microg m(-3) (range, 0.4-88.0) and 262 microg m(-3) (range, 52-662), respectively, to 0.6 microg m(-3) (range, not detected-3.7) and 77 microg m(-3) (range, not detected-261) after the smoking ban. The Pearson correlation coefficient between airborne nicotine and total dust was 0.86 (p < 0.001; n = 48). The post-shift geometric mean urinary cotinine concentration declined from 9.5 microg g(-1) creatinine (cr) (95% CI 6.5-13.7) to 1.4 microg g(-1) cr (95% CI 0.8-2.5) after the ban (p < 0.001) in 25 non-snuffing non-smokers. A reduction from 1444 microg g(-1) cr (95% CI 957-2180) to 688 microg g(-1) cr (95% CI 324-1458) was found (p < 0.05) in 29 non-snuffing smokers. The urinary cotinine levels increased from 11.7 microg g(-1) cr (95% CI 7.0-19.6) post-shift to 21.9 microg g(-1) cr (95% CI 13.3-36.3) (p < 0.01) in the next morning in 24 non-snuffing non-smokers before the smoking ban. A substantial reduction of airborne nicotine and total dust was observed after the introduction of a smoking ban in bars and restaurants. The urinary cotinine levels were reduced in non-smokers. The decline found in smokers may suggest a reduction in the amount of smoking after intervention. In non-smokers cotinine concentrations were higher based on urine sampled the morning after a shift than based on urine sampled immediately post-shift. 相似文献
62.
Andreas M. Zipperle James A. Coyer Karsten Reise Eelo Gitz Wytze T. Stam Jeanine L. Olsen 《Marine Biology》2009,156(10):2139-2148
Genotypic structure and temporal dynamics of the dwarf seagrass, Zostera noltii, were studied in an intertidal meadow that has persisted since prior to 1936 near the Wadden Sea island of Sylt. Samples were
collected from two 10 × 10 m plots separated by 250 m from May 2002 to June 2005 and from four 1 × 1 m plots from June 2003
to September 2004. All the samples were genotyped with nine microsatellite loci. No genotypes were shared between the plots
separated by 250 m. Genetic diversity was higher in the Wadden Sea than in the other regions of its geographic range. The
average clone size (genets) (SD) in the two plots was 1.38 (0.26) and 1.46 (0.4) m2, respectively, with a range up to 9 m2
and <20% persisted for >4 years. A high genetic and genotypic diversity was maintained by annual recruitment of seedlings
despite a dramatic decrease in ramet density that coincided with the severe heat stress event of 2003. Fine-scale (1 m2) analysis
suggested that extensive loss of seagrass cover precluded space competition among the genets, while a persistent seed bank
prevented local extinction. Long-term persistence of Z. noltii meadows in the intertidal Wadden Sea was achieved by high genet turnover and frequent seedling recruitment from a seed bank,
in contrast to the low diversity observed in large and long-living clones of Z. noltii and other seagrasses in subtidal habitats. 相似文献
63.
Robert A. Montgomery C. Nichole Rubeck-Schurtz Kelly F. Millenbah Gary J. Roloff Mark E. Whalon Larry G. Olsen 《Environmental management》2009,44(1):12-23
In the United States, environmental regulatory agencies are required to use “best available” scientific information when making
decisions on a variety of issues. However, agencies are often hindered by coarse or incomplete data, particularly as it pertains
to threatened and endangered species protection. Stakeholders often agree that more resolute and integrated processes for
decision-making are desirable. We demonstrate a process that uses species occurrence data for a federally endangered insect
(Karner blue butterfly), a readily available habitat modeling tool, and spatially explicit information about an important
Michigan commodity (tart cherries). This case study has characteristics of many protected species regulatory decisions in
that species occurrence data were sparse and unequally distributed; regulatory decisions (on pesticide use) were required
with potentially significant impacts on a viable agricultural industry; and stakeholder relations were diverse, misinformed,
and, in some situations, unjustly contentious. Results from our process include a large-scale, empirically derived habitat
suitability map for the focal species and a risk ranking of tart cherry orchards with risk based on the likelihood that pesticide
applications will influence the focal protected species. Although the majority (77%) of pesticide-influence zones overlapped
Karner blue butterfly habitat, risk scores associated with each orchard were low. Through our process we demonstrated that
spatially explicit models can help stakeholders visualize and quantify potential protected species effects. In addition, model
outputs can serve to guide field activities (e.g., species surveys and implementation of pesticide buffer zones) that help
minimize future effects. 相似文献
64.
With the changing demographic composition of the workforce, managing diversity in organizations is an important organizational function. Organizations have employed varying approaches to diversity management (DM), resulting in varying organizational outcomes. Meanwhile, researchers have called for more theoretical development within the DM area. We present a framework rooted in social and cross‐cultural psychological research, to foster theory development and empirical testing in the area of DM. We also derive several propositions to guide future research on DM and note some boundary conditions that suggest research opportunities of their own. Our framework contributes a theoretical conceptualization that enhances our understanding of organizations' DM efforts, integrates current typologies, and suggests new directions of inquiry for management scholars as well as guidelines for practitioners in the area. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
65.
66.
Liang Li McKenzie Hale Petra Olsen Nicole D. Berge 《Waste management (New York, N.Y.)》2014,34(11):2185-2195
Hydrothermal carbonization (HTC) is a thermal conversion process that can be an environmentally beneficial approach for the conversion of municipal solid wastes to value-added products. The influence of using activated sludge and landfill leachate as initial moisture sources during the carbonization of paper, food waste and yard waste over time at 250 °C was evaluated. Results from batch experiments indicate that the use of activated sludge and landfill leachate are acceptable alternative supplemental liquid sources, ultimately imparting minimal impact on carbonization product characteristics and yields. Regression results indicate that the initial carbon content of the feedstock is more influential than any of the characteristics of the initial liquid source and is statistically significant when describing the relationship associated with all evaluated carbonization products. Initial liquid-phase characteristics are only statistically significant when describing the solids energy content and the mass of carbon in the gas-phase. The use of these alternative liquid sources has the potential to greatly increase the sustainability of the carbonization process. A life cycle assessment is required to quantify the benefits associated with using these alternative liquid sources. 相似文献
67.
Pascale M. Biron Thomas Buffin-Bélanger Marie Larocque Guénolé Choné Claude-André Cloutier Marie-Audray Ouellet Sylvio Demers Taylor Olsen Claude Desjarlais Joanna Eyquem 《Environmental management》2014,54(5):1056-1073
River systems are increasingly under stress and pressure from agriculture and urbanization in riparian zones, resulting in frequent engineering interventions such as bank stabilization or flood protection. This study provides guidelines for a more sustainable approach to river management based on hydrogeomorphology concepts applied to three contrasted rivers in Quebec (Canada). Mobility and flooding spaces are determined for the three rivers, and three levels of “freedom space” are subsequently defined based on the combination of the two spaces. The first level of freedom space includes very frequently flooded and highly mobile zones over the next 50 years, as well as riparian wetlands. It provides the minimum space for both fluvial and ecological functionality of the river system. On average for the three studied sites, this minimum space was approximately 1.7 times the channel width, but this minimum space corresponds to a highly variable width which must be determined from a thorough hydrogeomorphic assessment and cannot be predicted using a representative average. The second level includes space for floods of larger magnitude and provides for meanders to migrate freely over a longer time period. The last level of freedom space represents exceptional flood zones. We propose the freedom space concept to be implemented in current river management legislation because it promotes a sustainable way to manage river systems, and it increases their resilience to climate and land use changes in comparison with traditional river management approaches which are based on frequent and spatially restricted interventions. 相似文献
68.
Erik Olsen Alf Ring Kleiven Hein Rune Skjoldal Cecilie H. von Quillfeldt 《Journal of Coastal Conservation》2011,15(2):257-269
Place-based management is any management action having implications for a specified area. Place-based management is seen as
a key component to practical implementation of ecosystem approach to management, with marine spatial planning (MSP) being
the currently most promoted approach. In the present paper we address the challenges of place-based management at local, regional
and global (oceanic) spatial scales using case studies from the Northeast Atlantic with examples from Norway. Both ecological,
governance and management complexity increases with increasing geographic scale, with associated increases in uncertainty
and thus increasing need for managing under the precautionary approach. A process where (ecologically) valuable and vulnerable
areas are defined early on is essential to successful place-based management under the ecosystem approach. Integrating across
sectors and achieving necessary cooperation between involved institutions and stakeholders is also necessary. 相似文献
69.
Solbu K Daae HL Olsen R Thorud S Ellingsen DG Lindgren T Bakke B Lundanes E Molander P 《Journal of environmental monitoring : JEM》2011,13(5):1393-1403
Methods for measurements and the potential for occupational exposure to organophosphates (OPs) originating from turbine and hydraulic oils among flying personnel in the aviation industry are described. Different sampling methods were applied, including active within-day methods for OPs and VOCs, newly developed passive long-term sample methods (deposition of OPs to wipe surface areas and to activated charcoal cloths), and measurements of OPs in high-efficiency particulate air (HEPA) recirculation filters (n = 6). In total, 95 and 72 within-day OP and VOC samples, respectively, have been collected during 47 flights in six different models of turbine jet engine, propeller and helicopter aircrafts (n = 40). In general, the OP air levels from the within-day samples were low. The most relevant OP in this regard originating from turbine and engine oils, tricresyl phosphate (TCP), was detected in only 4% of the samples (min-max 相似文献
70.
Environmental and Ecological Statistics - 相似文献