全文获取类型
收费全文 | 415篇 |
免费 | 2篇 |
国内免费 | 7篇 |
专业分类
安全科学 | 11篇 |
废物处理 | 28篇 |
环保管理 | 44篇 |
综合类 | 49篇 |
基础理论 | 71篇 |
污染及防治 | 155篇 |
评价与监测 | 39篇 |
社会与环境 | 27篇 |
出版年
2023年 | 5篇 |
2022年 | 9篇 |
2021年 | 19篇 |
2020年 | 5篇 |
2019年 | 3篇 |
2018年 | 18篇 |
2017年 | 20篇 |
2016年 | 28篇 |
2015年 | 16篇 |
2014年 | 22篇 |
2013年 | 40篇 |
2012年 | 23篇 |
2011年 | 30篇 |
2010年 | 23篇 |
2009年 | 20篇 |
2008年 | 23篇 |
2007年 | 23篇 |
2006年 | 14篇 |
2005年 | 17篇 |
2004年 | 9篇 |
2003年 | 10篇 |
2002年 | 10篇 |
2001年 | 4篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1979年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1967年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有424条查询结果,搜索用时 31 毫秒
131.
132.
Dioxins sources and current remediation technologies--a review 总被引:4,自引:0,他引:4
Dioxins are highly toxic and ubiquitous compounds that are unintentional by-products of several chemical processes on earth. According to the earth pollutant terminology, they are next to the nuclear catastrophes. It is because of their concerns over adverse health effects, a number of countries have introduced stringent emission standards. The present review focuses on entire sources of dioxins present in the environment. They are broadly classified into four major categories such as, incineration, combustion, industrial and reservoir sources. State-of-the-art remediation technologies available for reducing dioxins formation and emission from the important sources such as, flue gas, fly ash and soil were described in detail. Further, in order to get a comprehensive perception about the dioxins subject, topics such as, dioxins transfer in the environment, their mode of action, toxicity equivalence factor, exposure and health risk assessment were highlighted in brief in the introduction. A future prospects based on the findings of the review was discussed at the end. 相似文献
133.
Johnston PN Hult M Gasparro J Martínez-Canet MJ Vasselli R McKenzie RJ Solomon SB Lambrichts I 《Journal of environmental radioactivity》2005,80(2):245-257
It is possible to estimate radon exposure to man retrospectively by the in vivo measurement of the decay product (210)Pb, which accumulates in the bones. For in vivo methods, knowledge of the distribution of (210)Pb in the skeleton is needed to determine the optimal site for measurement, the skull or the knee. In this study the activity of (210)Pb in a variety of bone samples from 3 individuals have been measured in vitro using underground gamma-ray spectrometry. The individuals were unlikely to have had elevated intakes of Rn. These measurements give baseline data on the bone massic activity of (210)Pb. They show that the massic activity is similar for each of these people and there are similar massic activities of (210)Pb in the skull and the knee of the 2 individuals for which the skull was measured. Additionally for 2 of the individuals trabecular and cortical bone were separated and massic activities were found to be strongly correlated indicating that the (210)Pb is associated with the hydroxyapatite. 相似文献
134.
Jo McEvoy Geoffrey M. While David L. Sinn Erik Wapstra 《Behavioral ecology and sociobiology》2013,67(1):79-90
Competition between males is a key component of the agonistic intrasexual interactions that influence resource acquisition, social system dynamics, and ultimately reproductive success. Sexual selection theory predicts that traits that enhance success in intrasexual competition (particularly male–male competition) should be favored. In vertebrates, this often includes body size and aggression, with larger and/or more aggressive males outcompeting smaller or less aggressive conspecifics. The majority of studies consider aggression as a flexible trait which responds to local social or environmental conditions. However, aggression frequently shows considerable within-individual consistency (i.e., individuals have identifiable aggressive behavioral types). Little is known about how such consistency in aggression may influence competition outcomes. We integrated a detailed field study with a laboratory experiment to examine how a male’s aggressive phenotype and his size influence competitive interactions in Egernia whitii, a social lizard species which exhibits strong competition over resources (limited permanent shelter sites and basking sites). Individual aggression and size did not predict competition outcome in the laboratory nor did they predict home range size, overlap, or reproductive success in the field. However, winners of laboratory trial contests maintained consistent aggressive phenotypes while consistency in aggression was lost in losers. We suggest that aggression may be important in other functional contexts, such as parental care, and that alternative traits, such as fighting experience, may be important in determining competition outcome in this species. 相似文献
135.
Maria João Gonçalves Ana Catarina Calado Santos Carlos Fernando Dias Rodrigues Pedro Coelho André Nuno Costa António Jorge Guiomar 《毒物与环境化学》2013,95(6):1202-1211
In the 1920s, Otto Warburg reported a striking metabolic shift in solid tumors: contrary to their normal counter parts, which exhibited a nearly pure respiratory metabolism, where cancer cells relied strongly on lactic fermentation for energy production, even in the presence of ample oxygen. This metabolic shift, later named the Warburg effect, is now viewed as a nearly universal cancer phenotype. To investigate whether it is operating in hexavalent chromium (Cr(VI))-induced carcinogenesis, PC-12 cells were exposed to low Cr(VI) concentrations and effects determined on the rates of glucose uptake, lactate production and oxygen consumption, critical indicators of the type of energy metabolism adopted by the cells. Further, the influence on the cells’ energy charge, an important parameter in the evaluation of the cellular physiological state was assessed. In the presence of ample oxygen, concentration-dependent, statistically significant decreases in the energy charge were detected, which were accompanied by an increased glucose uptake rate. This enhanced uptake may constitute the first step in a compensatory mechanism aimed at counteracting the decrease in energy charge. Although these changes may be too small to exert an impact in the cellular functions, they may provide insight into the initial steps of Cr(VI)-induced carcinogenesis. 相似文献
136.
Previous studies in the Douro River estuary, based on occasional sampling, showed the presence of several estrogenic disrupting chemicals (EDCs). In sequence, we hypothesized that such type of pollution was more likely an enduring issue than an occasional phenomenon, and that it may even affect recreational beaches in each side of the estuarine mouth. Thus to conclude about the continuous influx of EDCs, water samples were taken twice a day, once per a week, from March to May of 2009, at four sites within the estuary and at two sites in the coastline. After solid-phase extraction, the extracts were prepared for GC-MS analysis of 11 reference EDCs. These embraced natural and pharmaceutical estrogens (17β-estradiol, estrone and 17α-ethynylestradiol) and xenoestrogenic industrial pollutants (4-octylphenol, 4-nonylphenol, and their mono and diethoxylates and bisphenol A). Data showed the ubiquitous presence of potentially hazardous amounts of natural estrogens (particularly of estradiol, ca 5.5?ng?L?1) and persistent organic pollutants such as nonylphenol mono (up to 550?ng?L?1) and diethoxylate (up to 2000?ng?L?1). It was concluded that the targeted area is continuously polluted by the assayed EDCs, and as a consequence, conditions exist for endocrine disturbance in the biota by chronic exposure to EDCs. 相似文献
137.
SUMMARY The European and UK legislation on environmental assessment (EA), as well as requiring assessment of significant ecological effects, also requires development proponents to recommend mitigation measures for adverse impacts. Drawing on a review of proposed ecological mitigation measures in 194 environmental statements (ES) for UK development proposals, this paper highlights problems with the current legislation in ensuring that ecological impacts are mitigated effectively, with a view to sustainable development. The review reveals confusion about the extent to which ecological mitigation is required. First, there is no objective basis for deciding which potentially adverse impacts should be mitigated. Proposed mitigation measures do not always relate directly to the ecological impacts identified in ES and there is a high risk of residual adverse effects. Second, there is no generally accepted method for evaluating the effectiveness of proposed mitigation measures, despite a clear recommendation from the UK's Department of the Environment (DOE, 1989) that an ‘assessment of the likely effectiveness’ of mitigation measures should be included in ES. Methods which can be used to evaluate the likely feasibility, costs and redistributional effects of ecological mitigation measures in EA are needed. Some of the factors which should be taken into account are considered in this paper. 相似文献
138.
Jérôme Lazard Hélène Rey-Valette Joël Aubin Syndhia Mathé Eduardo Chia Domenico Caruso 《国际发展与全球生态学杂志》2013,20(6):503-511
Little work dealing with the evaluation of aquaculture system sustainability has so far been undertaken on a global and comparative basis. Moreover, such work is mostly based on very unbalanced approaches in terms of the dimensions of sustainable development that are taken into account. The approach adopted in this article is designed to encompass all the dimensions of sustainability including the institutional one (governance). The taking into account of this latter, in particular, together with the role played by aquaculture in sustainability at the territorial level gives the approach its original and innovative nature. The process of establishing the checklist of sustainability indicators in aquaculture relies on a hierarchical nesting approach which makes it possible to link indicators with general sustainability criteria and principles. At once multidisciplinary and participatory, the approach compares several countries with highly differentiated types of aquaculture system. An original finding from this work is that the technically most intensive farming model scores better than more extensive systems, which might have been thought to be closer to natural systems in their environmental dimension and therefore intuitively more ‘sustainable’. This result suggests relating sustainability outcomes to the level of control and of devolved responsibilities. 相似文献
139.
Diogo Rúben Neves Sara Rodrigues Concei??o Juana Fortes Maria Teresa Reis Jo?o Alfredo Santos Rui Capit?o 《Journal of Coastal Conservation》2012,16(4):489-501
This paper describes a first approach on the risk assessment in port navigation using GUIOMAR, an integrated system for port and coastal engineering modelling developed at the National Civil Engineering Laboratory (LNEC), Portugal, using a GIS software environment. A set of automatic procedures was designed to include a new methodology based on the amplitude of the wave-induced vertical movement of a ship along its trajectory. In this methodology, the risk in port navigation is assessed on the basis of a combination of the probability of exceedance of a pre-set threshold for the ship??s vertical movements and its consequences. To test the new procedures, a set of sea wave records obtained at the Sines wave-buoy from 1988 to 2002 was transferred into Sines Port using two numerical models of sea wave propagation and deformation (SWAN and DREAMS), included in the GUIOMAR system. The numerical model WAMIT was used for estimating the wave-induced ship??s vertical movements inside the port. By applying the new procedures, automatic generation of risk maps was carried out for navigation in the vicinity of the West breakwater of the Port of Sines. The recent developments contribute towards a more versatile and efficient GUIOMAR system, which results in a more adequate tool to support decision-making processes in port and coastal management. 相似文献
140.
Byungjin Lee Eun Seo Jo Dong-Wha Park Jinsub Choi 《Frontiers of Environmental Science & Engineering》2021,15(5):90