全文获取类型
收费全文 | 460篇 |
免费 | 0篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 9篇 |
环保管理 | 49篇 |
综合类 | 225篇 |
基础理论 | 67篇 |
污染及防治 | 77篇 |
评价与监测 | 21篇 |
社会与环境 | 9篇 |
出版年
2018年 | 7篇 |
2016年 | 4篇 |
2014年 | 7篇 |
2013年 | 15篇 |
2012年 | 10篇 |
2011年 | 6篇 |
2010年 | 12篇 |
2009年 | 9篇 |
2008年 | 9篇 |
2007年 | 16篇 |
2006年 | 15篇 |
2005年 | 5篇 |
2004年 | 8篇 |
2003年 | 11篇 |
2002年 | 14篇 |
2001年 | 15篇 |
2000年 | 13篇 |
1998年 | 5篇 |
1997年 | 12篇 |
1996年 | 6篇 |
1995年 | 8篇 |
1994年 | 8篇 |
1993年 | 6篇 |
1992年 | 6篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1966年 | 4篇 |
1965年 | 6篇 |
1964年 | 7篇 |
1962年 | 4篇 |
1961年 | 12篇 |
1960年 | 9篇 |
1959年 | 7篇 |
1958年 | 7篇 |
1957年 | 14篇 |
1955年 | 10篇 |
1954年 | 5篇 |
1950年 | 5篇 |
1944年 | 4篇 |
1941年 | 5篇 |
1940年 | 4篇 |
1939年 | 9篇 |
1936年 | 4篇 |
1935年 | 6篇 |
1932年 | 3篇 |
1931年 | 4篇 |
1930年 | 6篇 |
1926年 | 3篇 |
1922年 | 8篇 |
1914年 | 3篇 |
排序方式: 共有462条查询结果,搜索用时 0 毫秒
1.
2.
3.
Ludwig Bergmann 《Die Naturwissenschaften》1958,45(6):121-123
4.
5.
6.
Bernhard Steubing Heinz Böni Mathias Schluep Uca Silva Christian Ludwig 《Waste management (New York, N.Y.)》2010,30(3):473-482
The quantities of e-waste are expected to increase sharply in Chile. The purpose of this paper is to provide a quantitative data basis on generated e-waste quantities. A material flow analysis was carried out assessing the generation of e-waste from computer equipment (desktop and laptop PCs as well as CRT and LCD-monitors). Import and sales data were collected from the Chilean Customs database as well as from publications by the International Data Corporation. A survey was conducted to determine consumers’ choices with respect to storage, re-use and disposal of computer equipment. The generation of e-waste was assessed in a baseline as well as upper and lower scenarios until 2020.The results for the baseline scenario show that about 10,000 and 20,000 tons of computer waste may be generated in the years 2010 and 2020, respectively. The cumulative e-waste generation will be four to five times higher in the upcoming decade (2010–2019) than during the current decade (2000–2009). By 2020, the shares of LCD-monitors and laptops will increase more rapidly replacing other e-waste including the CRT-monitors. The model also shows the principal flows of computer equipment from production and sale to recycling and disposal. The re-use of computer equipment plays an important role in Chile. An appropriate recycling scheme will have to be introduced to provide adequate solutions for the growing rate of e-waste generation. 相似文献
7.
Goettems-Fiorin Pauline Brendler Costa-Beber Lilian Corrêa dos Santos Jaíne Borges Friske Paula Taís Sulzbacher Lucas Machado Frizzo Matias Nunes Ludwig Mirna Stela Rhoden Cláudia Ramos Heck Thiago Gomes 《Environmental science and pollution research international》2019,26(20):20581-20594
Environmental Science and Pollution Research - The reduction of estrogen levels, as a result of menopause, is associated with the development of metabolic diseases caused by alterations in... 相似文献
8.
Gun Astri Swedjemark Hkan Wahren Astrid Mkitalo Wilhelm Tell 《Environment international》1989,15(1-6)
Sweden introduced limits and gave recommendations for decreasing the indoor radon daughter concentrations in 1980. The resulting experiences are summarized. From 1979 to 1987, measurements were carried out by the local authorities in about 58 000 out of 3.9 million homes in Sweden, and 5300 homes were found to have levels exceeding the limit for existing houses, or 400 Bq/m3 of equilibrium equivalent concentration of radon (EER). This may be about 13% of the estimated 40 000 homes with levels exceeding 400 Bq/m3. Very high levels, up to 28 000 Bq/m3, have been found. According to the local authorities, in one third of the homes found with levels exceeding the limit (1921 homes) certain reconstruction and other measures have been taken in order to decrease the levels. In reality, measures have been carried out in more houses. The methods depend on the radon source. The average reductions found for respective methods are reported. The local authorities can require a check of the radon daughter concentrations in newly built houses when they suspect that the concentrations exceed the limit of 70 Bq/m3. In 11% of the measured homes built during 1981 to 1985, the levels were above the limit for newly built houses. In 1.4% of these houses, the limit for existing houses, 400 Bq/m3, had been exceeded. The strategy to decrease both the collective dose to the population and the individual dose is discussed. 相似文献
9.
10.