全文获取类型
收费全文 | 4589篇 |
免费 | 91篇 |
国内免费 | 40篇 |
专业分类
安全科学 | 233篇 |
废物处理 | 246篇 |
环保管理 | 763篇 |
综合类 | 505篇 |
基础理论 | 1008篇 |
环境理论 | 6篇 |
污染及防治 | 1315篇 |
评价与监测 | 367篇 |
社会与环境 | 233篇 |
灾害及防治 | 44篇 |
出版年
2023年 | 30篇 |
2022年 | 71篇 |
2021年 | 93篇 |
2020年 | 61篇 |
2019年 | 56篇 |
2018年 | 107篇 |
2017年 | 125篇 |
2016年 | 171篇 |
2015年 | 141篇 |
2014年 | 173篇 |
2013年 | 420篇 |
2012年 | 237篇 |
2011年 | 307篇 |
2010年 | 199篇 |
2009年 | 229篇 |
2008年 | 262篇 |
2007年 | 264篇 |
2006年 | 242篇 |
2005年 | 169篇 |
2004年 | 152篇 |
2003年 | 167篇 |
2002年 | 138篇 |
2001年 | 85篇 |
2000年 | 72篇 |
1999年 | 56篇 |
1998年 | 52篇 |
1997年 | 44篇 |
1996年 | 48篇 |
1995年 | 36篇 |
1994年 | 48篇 |
1993年 | 39篇 |
1992年 | 25篇 |
1991年 | 29篇 |
1990年 | 17篇 |
1989年 | 14篇 |
1988年 | 17篇 |
1987年 | 22篇 |
1986年 | 15篇 |
1985年 | 20篇 |
1984年 | 16篇 |
1983年 | 25篇 |
1982年 | 23篇 |
1981年 | 30篇 |
1980年 | 14篇 |
1979年 | 10篇 |
1978年 | 7篇 |
1977年 | 11篇 |
1971年 | 6篇 |
1966年 | 6篇 |
1958年 | 7篇 |
排序方式: 共有4720条查询结果,搜索用时 15 毫秒
11.
Although many conventional physical remediation methods are viewed as proven, they often only relocate wastes to other sites or into the air. How do the emerging biological and chemical in situ methods perform in the same applications? This article reviews their results (much of it in the laboratory) as well as their promise of more complete neutralization of hazardous wastes, lower capital costs, and longer-duration cleanup processes. The optimal method may be a combination of chemical and biological in situ techniques with physical pump-and-treat methods. 相似文献
12.
13.
Paul F. J. Eagles 《生态毒理学报》2002,(4):65-67
要保护公园的生态、社会、经济和文化价值 ,游客管理具有根本的重要性 . 政府要求公园进一 步在财政上自给自足 . 正在制定一个更加完善的管理方法代替单纯地限制游客的数量 . 这种 方法鼓励公众参与公园的目标设定和游客满意度评价 ,并奖励胜任的财务管理 . 相似文献
14.
Thierry Rousseau Nicole Laurent Christel Thauvin-Robinet Stéphanie Lionnais Christine Durand Laurence Faivre Paul Sagot 《黑龙江环境通报》2002,22(8):692-696
Fraser syndrome (MIM 219000) is a rare disorder of autosomal recessive inheritance, characterized by the association of cryptophthalmos, syndactyly and genital abnormalities. Here we report on two cases of Fraser syndrome (cryptophthalmos syndrome) in a non-consanguineous couple, with variable expression in echographic, clinical and autopsy findings. Furthermore, we highlight the difficulties in prenatal diagnosis of Fraser syndrome. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
15.
Environmental factors have long been shown to influence species distributions, with range limits often resulting from environmental
stressors exceeding organism tolerances. However, these abiotic factors may differentially affect species with multiple life-history
stages. Between September 2004 and January 2006, the roles of temperature and nutrient availability in explaining the southern
distributions of two understory kelps, Pterygophora californica and Eisenia arborea (Phaeophyceae, Laminariales), were investigated along the coast of California, USA and the Baja California Peninsula, Mexico,
by limiting either: (a) tissue nitrogen uptake and storage by adult sporophytes during periods of elevated temperature, and/or
(b) production of embryonic sporophytes by microscopic gametophytes. Results suggest that while adult sporophytes of both
species are tolerant of high temperatures and low nutrients, reproduction by their microscopic stages is not. Specifically,
while E. arborea produced embryonic sporophytes at both 12 and 18°C, temperatures commonly observed throughout the southern portion of its
range, P. californica produced sporophytes at 12 but not at 18°C. As a result, it appears that the southern distribution of P. californica, which ends in northern Baja California, Mexico, may be limited by temperature acting on its microscopic stages. In contrast,
the ability of E. arborea’s microscopic and adult stages to tolerate elevated temperatures allows it to persist in the warmer southern waters of Baja
California, as well as to the north along the California coast where both species co-occur. 相似文献
16.
Material suppliers and industrial metabolism 总被引:1,自引:1,他引:0
Arnold Tukker Avtar S. Jasser René Kleijn 《Environmental science and pollution research international》1997,4(2):113-120
Life Cycle Assessment (LCA) is not sufficiently tailored to the analysis of strategic environmental problems of material suppliers. Sustainable development calls for a reduction by a factor of 10 to 20 in the material intensity of the economy, a situation which leads to dramatic shifts in markets for raw materials. Furthermore, a material supplier might have major improvement options in the material’s numerous downstream uses. LCAs, however, can’t cover these two aspects. An adapted form of Substance Flow Analysis (SFA) may be an answer. This approach defines a system in relation to the flow of a specific material through society. All environmental interventions related to the material are inventoried. An emission evaluation indicates the dominant environmental bottlenecks, given the current market volume of each application of the material. This helps to identify improvement options and strategic choices in market portfolios. Scenario analysis on potential measures can further indicate changes of material flows — and thus markets — in the system. The approach is illustrated with a case study on chlorine. 相似文献
17.
Ingrid Witters Hans Van Bokhoven A. Goossens Frans-André Van Assche Jean-Pierre Fryns 《黑龙江环境通报》2001,21(13):1119-1122
We report the prenatal diagnosis at 16 weeks' gestation of bilateral split-hand/split-foot malformation (SHSFM) with severe lobster claw deformity of hands and feet in a male fetus without associated malformations. A minor manifestation of SHSFM was present in the father with only mild bilateral foot involvement (syndactyly I–II; cleft II–III; left cutaneous syndactyly III–IV). Mutation analysis of the p63 gene on chromosome 3q27 showed a missense mutation 577A→G (predicting amino acid substitution K193E) in the father. This mutation has not been reported so far in SHSFM but resembles the previously reported 580A→G (predicting amino acid substitution K194E) in a family with SHSFM. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
18.
19.
Stéphanie Couvreur-Lionnais Thierry Rousseau Nicole Laurent Christel Thauvin-Robinet Eve Senet-Lacombe Anne Lise Delezoïde Francine Mugneret Christine Durand Laurence Faivre Paul Sagot 《黑龙江环境通报》2005,25(2):172-175
Juberg–Hayward syndrome is a rare autosomal recessive syndrome characterised by the association of growth retardation, microcephaly, cleft lip and palate, and thumb and radial ray abnormalities. To date, no prenatal cases have been reported. Here, we report on the first prenatal case of Juberg–Hayward syndrome. The diagnosis was established following fetopathological study. Besides the cardinal features of the syndrome, this prenatal case was remarkable for the severity of the short arm malformation and by the finding of big toe agenesis and cerebral abnormalities including hydrocephalus, agenesis of corpus callosum, and cerebellar hypoplasia. We conclude that the diagnosis of Juberg–Hayward syndrome can be discussed prenatally following ultrasound diagnosis of the association of intrauterine growth restriction, microcephaly, thumb/radial anomalies, and cleft lip/palate. Copyright © 2005 John Wiley & Sons, Ltd. 相似文献
20.
Biaou Séverin Gouwakinnou Gerard Nounagnon Biaou Honoré Samadori Sorotori Tovihessi Marc Sèwanou Awessou Beranger Kohomlan Ahononga Fiacre Codjo Houéto Felix Ogoubiyi 《Environment, Development and Sustainability》2022,24(8):9885-9905
Environment, Development and Sustainability - Land use and land cover change (LULCC) is one of the problems that the world has been facing for the last few decades despite political attention.... 相似文献