全文获取类型
收费全文 | 105篇 |
免费 | 1篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 7篇 |
废物处理 | 3篇 |
环保管理 | 12篇 |
综合类 | 15篇 |
基础理论 | 28篇 |
污染及防治 | 34篇 |
评价与监测 | 2篇 |
社会与环境 | 8篇 |
出版年
2022年 | 2篇 |
2019年 | 1篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 6篇 |
2011年 | 10篇 |
2010年 | 5篇 |
2009年 | 9篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 14篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 5篇 |
2001年 | 2篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1922年 | 1篇 |
排序方式: 共有109条查询结果,搜索用时 335 毫秒
91.
Water quality indices across Europe--a comparison of the good ecological status of five river basins
von der Ohe PC Prüss A Schäfer RB Liess M de Deckere E Brack W 《Journal of environmental monitoring : JEM》2007,9(9):970-978
The European Water Framework Directive (WFD) requires the definition of near-natural reference conditions to determine the extent of water bodies' deviation from "good ecological status" caused by stress gradients. However, the classification of ecological quality depends on the assessment method applied and the stressor concerned. While assessment methods that are generally applicable would be favourable, many European countries employ the locally developed water quality metrics that assess the impact of organic pollution (including eutrophication) and the associated decrease in dissolved oxygen. These indices do not specifically address stress from organic toxicants, such as pesticides. The aim of this study was to examine the performance of presently used assessment methods to identify reference conditions of non-contaminated streams in five selected European river basins, covering the geographical region from Spain to Finland, as a crucial prerequisite to indicate toxic gradients. The analysis comprised the Belgium biotic index (BBI), the biological monitoring working party (BMWP) scoring system and the revised German saprobic index. For comparison, we included an adaptation of the recently developed SPEAR index. In two previous field studies, this metric highly correlated with measured pesticide gradients. In this study, SPEAR was the only indicator that was generally applicable to all monitoring data and capable of determining "high ecological status" of reference conditions in all basins. Thus, based upon previous and own results, the authors suggest the species at risk (SPEAR) index to be potentially useful as a European-wide index to address deviations from "good ecological status" due to organic toxicants and recommend it for consideration in integrated water-resource evaluations under the WFD. 相似文献
92.
93.
94.
95.
This study explores conflict in recreational use of the Black Forest Nature Park (BFNP) by six different nature sports groups as a function of infrastructure, forest management and other users. A multi-step, methodological triangulation conflict model from US recreation management was applied and tested in the Park. Results from two groups, hikers and mountain bikers, are analysed in depth. The main conflict potentials were due to infrastructure and value conflicts. These were influenced by various visitor characteristics such as resource attachment, experiences, activity-style, expectations and motives. Results of quantitative data analysis were further interpreted by interviews with agency and group leaders. This methodological combination reveals a robust understanding of recreation conflict and management in the BFNP. 相似文献
96.
97.
Carsten K.W. De Dreu 《组织行为杂志》2008,29(1):5-18
Many authors, myself included, have suggested that workplace conflict may be beneficial to the organization. I argue that the support for this conclusion is rather weak. A selective and necessarily limited review of the literature shows that: (1) the positive functions of conflict are found only under an exceedingly narrow set of circumstances, (2) the conclusion that (particular forms of) conflict and conflict management has positive functions can be criticized on methodological grounds, (3) even under favorable circumstances a number of serious negative functions can be identified as well, (4) negative functions easily outweigh positive functions, prohibiting the emergence of ‘positive workplace conflict’ (where conflict has predominantly positive consequences), and (5) organizations need cooperative conflict management not because it brings positive conflict, but because it prevents workplace conflict to hurt too much. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
98.
Vuletić D Potočić N Krajter S Seletković I Fürst C Makeschin F Galić Z Lorz C Matijašič D Zupanič M Simončič P Vacik H 《Environmental management》2010,46(6):931-940
In this article, several findings on socio-economic conditions derived from national reports and a web-based questionnaire are discussed and related to the changing role of forestry and the future forest policy development. A number of Central and South-eastern European countries taking part in a SEE-ERA-NET project ReForMan project (www.reforman.de) participated in data acquisition: Austria, Bosnia and Herzegovina, Croatia, Germany, Serbia and Slovenia. The aim of the research was to illustrate the present structure of forestry sector, as well as investigate newly emerging topics in forestry of Central and South-eastern Europe. The results indicated certain patterns in attitudes and perceptions among stakeholders that can be related to socio-economic conditions defined for each country. Clear differences between member and non-member countries exist only in level of implementation of EU legislation. Results showed consensus on main threats to the forests among all countries, but also some country specifics in perceptions of factors influencing forestry, their importance and professional competencies. These results could be additionally explained by influence of historical conditions which shaped development of forest sector in SEE region especially in its organizational dimension as well as in perceived role of forestry expressed through recognition of main forest functions. The influence of European forest policy processes in the region is evident through adaptation of EU legislation and perceived implications of international processes on national levels. Based on this observation, two possible options for future development of the forestry sector can be foreseen: (i) focusing on the productive function of forests and fostering its' sustainable use; or (ii) putting an emphasis on environmental and social issues. In both cases supporting public participation in decision-making processes is recommendable. Another conclusion based on perceived medium to low professional competencies to cope with new topics, that there is lack of confidence and need for professional support in decisionmaking processes. 相似文献
99.
Endocrine disrupting chemicals (EDCs) can alter endocrine function in exposed animals. Such critical effects, combined with the ubiquity of EDCs in sewage effluent and potentially in tapwater, have led to concerns that they could be major physiological disruptors for wildlife and more controversially for humans. Although sewage effluent is known to be a rich source of EDCs, there is as yet no evidence for EDC uptake by invertebrates that live within the sewage treatment system. Here, we describe the use of an extraction method and GC-MS for the first time to determine levels of EDCs (e.g., dibutylphthalate, dioctylphthalate, bisphenol-A and 17beta-estradiol) in tissue samples from earthworms (Eisenia fetida) living in sewage percolating filter beds and garden soil. To the best of our knowledge, this is the first such use of these techniques to determine EDCs in tissue samples in any organism. We found significantly higher concentrations of these chemicals in the animals from sewage percolating filter beds. Our data suggest that earthworms can be used as bioindicators for EDCs in these substrates and that the animals accumulate these compounds to levels well above those reported for waste water. The potential transfer into the terrestrial food chain and effects on wildlife are discussed. 相似文献
100.