全文获取类型
收费全文 | 774篇 |
免费 | 19篇 |
国内免费 | 84篇 |
专业分类
安全科学 | 36篇 |
废物处理 | 41篇 |
环保管理 | 42篇 |
综合类 | 264篇 |
基础理论 | 168篇 |
污染及防治 | 218篇 |
评价与监测 | 77篇 |
社会与环境 | 27篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 14篇 |
2022年 | 34篇 |
2021年 | 36篇 |
2020年 | 25篇 |
2019年 | 16篇 |
2018年 | 35篇 |
2017年 | 37篇 |
2016年 | 40篇 |
2015年 | 29篇 |
2014年 | 59篇 |
2013年 | 97篇 |
2012年 | 48篇 |
2011年 | 60篇 |
2010年 | 38篇 |
2009年 | 47篇 |
2008年 | 33篇 |
2007年 | 27篇 |
2006年 | 22篇 |
2005年 | 13篇 |
2004年 | 11篇 |
2003年 | 7篇 |
2002年 | 9篇 |
2001年 | 5篇 |
2000年 | 11篇 |
1999年 | 12篇 |
1998年 | 8篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1994年 | 7篇 |
1993年 | 3篇 |
1991年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1982年 | 5篇 |
1967年 | 3篇 |
1966年 | 1篇 |
1965年 | 2篇 |
1964年 | 3篇 |
1963年 | 1篇 |
1961年 | 3篇 |
1960年 | 5篇 |
1959年 | 6篇 |
1958年 | 10篇 |
1957年 | 6篇 |
1956年 | 6篇 |
1955年 | 1篇 |
1928年 | 1篇 |
排序方式: 共有877条查询结果,搜索用时 15 毫秒
861.
M. Mojašević C.S. Helling T. J. Gish M. A. Doherty 《Journal of environmental science and health. Part. B》2013,48(3):469-476
Abstract Pesticides are often applied in combination, but less‐often is soil persistence measured this way. The present field and laboratory study determined relative persistence of five herbicides and two insecticides, co‐applied, as a function of three soil water contents. Losses were modeled adequately by first‐order dissipation, with no significant improvement by using a two‐compartment model. The order of persistence in a silt loam, at 25% moisture, was carbofuran < cyanazine < metribuzin = alachlor < atrazine < ethoprop < metolachlor (t½ ranged from 7–91 days). Carbofuran degradation increased greatly from 12–25% soil moisture; atrazine was unaffected by 12–35%, whereas the remaining compounds showed limited increasing loss in wetter soil. Field‐based persistence was more variable, but generally similar to lab rankings. 相似文献
862.
嘉兴市环境库兹涅茨曲线特征分析 总被引:1,自引:0,他引:1
环境库兹涅茨曲线(EKC)暗含了对经济增长和环境之间的发展战略。运用EKC理论模型,对嘉兴市工业"三废"排放量与人均GDP之间关系进行分析,发现工业废水、工业废气、工业固体废弃物排放量与人均GDP之间的关系分别为N型、倒U型左侧上升阶段、倒U型左侧接近拐点,表明嘉兴市经济增长还处在加重环境负担的阶段,还未实现环境与经济的协调发展。引起工业废水、工业废气排放量居高不下的原因分别是嘉兴市产业结构特点和能源结构特点。建议优化产业结构,调整能源结构,推进循环经济发展,争取早日跨越环境库兹涅茨曲线拐点,实现环境经济的协调发展。 相似文献
863.
发挥专业救援作用,加强装备与技术保障 总被引:3,自引:0,他引:3
此次汶川大地震带给我们巨大伤痛,也引起社会各界的许多思考。就地震救援和救援过程中的个体防护问题,我们于2008年6月30日访问了中国地震局震灾应急救援司。 相似文献
864.
阐述了镇雄县城区大气污染的现状,分析了大气污染原因、污染范围、主要污染物、排放形式和污染发展趋势,从而说明镇雄县大气污染防治对策的必要性.根据镇雄县地域经济层次特点,提出符合实际情况的大气污染防治对策. 相似文献
865.
866.
867.
Hospital effluent and connected waste water treatment plant (WWTP) influent and effluent were sampled daily to determine the levels and inter-day variations of three naturally occurring steroid estrogens: estrone, 17β-estradiol, estriol, and synthetic 17α-ethinylestradiol. After solid phase extraction, interferences were removed with a silica gel clean-up step and the samples analysed using gas chromatography with mass selective detection (GC-MSD). The determined inter-day concentrations in hospital effluent were between 8.6 to 31.3 ng L(-1) for estrone, 相似文献
868.
Zarza Eugenia Diego-García Elia García Luz Verónica Castro Ricardo Mejía Gamaliel Herrera David Cuevas Raúl Palomeque Ángeles Iša Pavel Guillén Karina 《Food and environmental virology》2022,14(2):199-211
Food and Environmental Virology - The COVID-19 pandemic has been monitored by applying different strategies, including SARS-CoV-2 detection with clinical testing or through wastewater-based... 相似文献
869.
Simona Kralj-Fišer Tatjana Čelik Tjaša Lokovšek Klavdija Šuen Rebeka Šiling Matjaž Kuntner 《Die Naturwissenschaften》2014,101(7):565-575
Urbanization poses serious extinction risks, yet some species thrive in urban environments. This may be due to a pronounced developmental plasticity in these taxa, since phenotypically, plastic organisms may better adjust to unpredictable urban food resources. We studied phenotypic plasticity in Nuctenea umbratica, a common European forest and urban vegetation spider. We subjected spiderlings to low (LF), medium (MF) and high (HF) food treatments and documented their growth and developmental trajectories into adulthood. Spiders from the three treatments had comparable numbers of instars and growth ratios, but differed in developmental periods. Longest developing LF spiders (♀?=?390, ♂?=?320 days) had the smallest adults, but MF (♀?=?300, ♂?=?240 days) and HF (♀?=?240, ♂?=?210 days) spiders reached comparable adult sizes through shorter development. While males and females had comparable instar numbers, females had longer development, higher growth ratios, adult sizes and mass; and while males adjusted their moulting to food availability, female moulting depended on specific mass, not food treatment. We discussed the patterns of Nuctenea sex-specific development and compared our results with published data on two other Holarctic urban colonizers (Larinioides sclopetarius, Zygiella x-notata) exhibiting high plasticity and fast generation turn-over. We conclude that despite relatively unconstrained developmental time in the laboratory enabling Nuctenea to achieve maximal mass and size—main female fitness proxies—their relatively fixed growth ratio and long generation turn-over may explain their lower success in urban environments. 相似文献
870.
Abstract Congestion causes many externalities for the society, including time delays, excessive fuel consumption, air pollution, noise and safety concerns. In Shanghai, various policy options have been explored, piloted or applied; however, not all of them may be understood and accepted by the public. A survey was conducted to investigate people’s attitudes towards several policy options. The main findings reveal that Shanghai residents are resistant to certain policies, such as congestion charges, higher parking charges in congested areas and car restrictions. Instead, they favor public transport provisions. The paper suggests that there is a case for promoting public transport and more efficient trips when the car ownership is still low, and for investing in a policy of educating the public on the ‘true’ costs and causes of congestion before embarking on an intensive policy of congestion charges or restrictions. 相似文献