全文获取类型
收费全文 | 31075篇 |
免费 | 285篇 |
国内免费 | 235篇 |
专业分类
安全科学 | 758篇 |
废物处理 | 1261篇 |
环保管理 | 3647篇 |
综合类 | 7325篇 |
基础理论 | 7521篇 |
环境理论 | 6篇 |
污染及防治 | 7612篇 |
评价与监测 | 1838篇 |
社会与环境 | 1472篇 |
灾害及防治 | 155篇 |
出版年
2022年 | 242篇 |
2019年 | 198篇 |
2018年 | 381篇 |
2017年 | 409篇 |
2016年 | 586篇 |
2015年 | 469篇 |
2014年 | 738篇 |
2013年 | 2274篇 |
2012年 | 830篇 |
2011年 | 1161篇 |
2010年 | 1032篇 |
2009年 | 1069篇 |
2008年 | 1171篇 |
2007年 | 1255篇 |
2006年 | 1060篇 |
2005年 | 939篇 |
2004年 | 954篇 |
2003年 | 910篇 |
2002年 | 878篇 |
2001年 | 1174篇 |
2000年 | 812篇 |
1999年 | 501篇 |
1998年 | 355篇 |
1997年 | 378篇 |
1996年 | 382篇 |
1995年 | 438篇 |
1994年 | 440篇 |
1993年 | 368篇 |
1992年 | 393篇 |
1991年 | 390篇 |
1990年 | 425篇 |
1989年 | 390篇 |
1988年 | 315篇 |
1987年 | 320篇 |
1986年 | 307篇 |
1985年 | 315篇 |
1984年 | 318篇 |
1983年 | 306篇 |
1982年 | 305篇 |
1981年 | 317篇 |
1980年 | 262篇 |
1979年 | 286篇 |
1978年 | 234篇 |
1977年 | 229篇 |
1976年 | 197篇 |
1975年 | 208篇 |
1974年 | 217篇 |
1973年 | 232篇 |
1972年 | 204篇 |
1967年 | 230篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
291.
Costa José Arnaldo S. Sarmento Victor H. V. Romão Luciane P. C. Paranhos Caio M. 《Environmental science and pollution research international》2019,26(25):25476-25490
Environmental Science and Pollution Research - The rice husk ash (RHA) was used as an alternative source of silica for the synthesis of the functionalized mesoporous material, which was used in the... 相似文献
292.
The analysis of human health risk with a detailed procedure operating in a GIS environment 总被引:2,自引:0,他引:2
An approach for quantifying the human health risk caused by industrial sources, which, daily or accidentally, emit dangerous pollutants able to impact on different environmental media, is introduced. The approach is performed by the HHRA-GIS tool which employs an integrated, multimedia, multi-exposure pathways and multi-receptors risk assessment model able to manage all the steps of the analysis in a georeferenced structure. Upper-bound excess lifetime cancer risk and noncarcinogenic hazards are the risk measures, the spatial distribution of which is calculated and mapped on the involved territory, once all the pathways and receptors of the study area are identified. A sensitivity analysis completes the calculations allowing to understand how risk estimates are dependent on variability in the factors contributing to risk. The last part of the paper makes use of a case study concerning a working industrial site to put in evidence in which way the designed tool can help local authorities and policy makers in managing risks and planning remedial and reduction actions. The considered geographical area is a hypothetical territory characterized by residential, agricultural and industrial zones. The presence of two sources of contamination, a municipal waste incinerator (MWI) and a contaminated site, are evaluated by the tool application. Various typologies of receptors have been taken into account, each of them characterized by different anatomical and dietary properties. The achieved results are analyzed, compared with acceptable and background values and alternatives of minor environmental impact calculated. 相似文献
293.
Methods for integrated assessment 总被引:4,自引:1,他引:4
Integrated assessment is an approach that seeks to involve all disciplines in policy-relevant assessment. The process aims
to encompass environmental science, technology and policy problems. The aim is to establish an overview of the environmental
issue in question that attempts to avoid the mistakes of the past associated with narrow, one-sided or unidimensional approaches.
A number of methods are available for such assessments. However, they are also subject to a number of limitations, difficulties
and dilemmas. Integrated methods are inherently complicated and the tradition is that only experts are involved. New more
inclusionary procedures have to be devised in order to involve all stakeholders. They have to be involved in the framing of
the issue and in the value judgements associated with the approach. The dilemmas cannot be solved by integrated approaches,
but they can be mitigated via proper identification, analysis and evaluation of the gains and losses involved. In structuring
the analysis the existence of ignorance has to be accounted for and communicated to the managers and the political decision
makers. The ignorance/uncertainty aspects can be partially accommodated for via an intensification of feasible monitoring
and research so as to minimise the risks of unpleasant surprises.
Electronic Publication 相似文献
294.
Protected areas’ role in climate-change mitigation 总被引:1,自引:0,他引:1
295.
David A. Ross Héctor M. Guzmán Vincent J. Van Hinsberg Catherine Potvin 《Journal of environmental science and health. Part. B》2016,51(10):675-687
Concentrations of eight elements were measured in Chelonia mydas and Lepidochelys olivacea eggs collected along the Pacific coast of Panama. Manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), and mercury (Hg) concentrations were similar to previous reports of these species from around the world, while lead (Pb) was lower than previous reports. Cd posed the highest health risk to people who regularly eat the eggs, with average consumption rates leading to target hazard quotients (THQ) of up to 0.35 ± 0.15. Our conclusions indicate that current turtle egg consumption in isolated, coastal Pacific communities may pose a health concern for young children, and that youth and young adults should limit their consumption of turtle eggs to reduce their total intake of nonessential metals. 相似文献
296.
297.
298.
E. S. Zakharov V. M. Safronov L. P. Koryakina N. N. Smetanin 《Russian Journal of Ecology》2016,47(4):392-398
The population of foxes in the central regions of Yakutia has grown by a factor of four to five during the period from 2000 to 2011–2012, following an increase in the abundance of voles from the genus Microtus. A total of 130 carcasses of foxes taken in 2007–2012 have been examined. Age- and sex-related variation in morphological features has been described. The demographic structure of the population has been studied by estimating animal age from annual layers in the recording structures. Changes in female fertility and involvement in reproduction depending on age and feeding conditions have been analyzed. Changes in the composition of fox diet caused by long-term population depression in the mountain hare and their effect on the dynamics of fox abundance have been revealed. Age- and sex-related characteristics of the condition factor in foxes and sex-related differences in their dietary preferences have been demonstrated. 相似文献
299.
N. P. Korablev M. P. Korablev P. N. Korablev I. L. Tumanov 《Russian Journal of Ecology》2016,47(3):289-295
A comparative analysis of epigenetic variation has been performed in nine European populations and population groups of the American mink. It has been shown that differentiation of samples in nonmetric characters is due mainly to endogenous processes that have occurred in introduced populations in the course of colonization of new territory by the invasive species. Environmental factors have played a secondary role, with the influence of the geographic (latitudinal) origin of a given sample being considerable and stronger than that of macroclimatic factors. 相似文献
300.