全文获取类型
收费全文 | 15245篇 |
免费 | 49篇 |
国内免费 | 27篇 |
专业分类
安全科学 | 107篇 |
废物处理 | 1123篇 |
环保管理 | 1610篇 |
综合类 | 1756篇 |
基础理论 | 4221篇 |
环境理论 | 5篇 |
污染及防治 | 3704篇 |
评价与监测 | 1527篇 |
社会与环境 | 1253篇 |
灾害及防治 | 15篇 |
出版年
2023年 | 63篇 |
2022年 | 172篇 |
2021年 | 173篇 |
2020年 | 75篇 |
2019年 | 88篇 |
2018年 | 1564篇 |
2017年 | 1467篇 |
2016年 | 1407篇 |
2015年 | 290篇 |
2014年 | 335篇 |
2013年 | 569篇 |
2012年 | 793篇 |
2011年 | 1669篇 |
2010年 | 942篇 |
2009年 | 818篇 |
2008年 | 1184篇 |
2007年 | 1540篇 |
2006年 | 297篇 |
2005年 | 250篇 |
2004年 | 220篇 |
2003年 | 218篇 |
2002年 | 252篇 |
2001年 | 132篇 |
2000年 | 87篇 |
1999年 | 56篇 |
1998年 | 36篇 |
1997年 | 25篇 |
1996年 | 16篇 |
1995年 | 44篇 |
1994年 | 32篇 |
1993年 | 22篇 |
1992年 | 22篇 |
1991年 | 15篇 |
1990年 | 18篇 |
1989年 | 14篇 |
1988年 | 14篇 |
1983年 | 14篇 |
1967年 | 12篇 |
1966年 | 15篇 |
1965年 | 16篇 |
1964年 | 35篇 |
1963年 | 18篇 |
1962年 | 23篇 |
1961年 | 14篇 |
1960年 | 14篇 |
1959年 | 28篇 |
1958年 | 35篇 |
1957年 | 19篇 |
1956年 | 15篇 |
1955年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
991.
Yuan-yuan Wei Yan Liu Yun Zhang Rui-hua Dai Xiang Liu Jin-jian Wu Qiang Zhang 《Environmental science and pollution research international》2011,18(1):46-50
Introduction
Effluent organic matter from biological wastewater treatment plants is composed of degradation products and soluble microbial products (SMP). Protein, polysaccharide, humic acid, and DNA were major biomolecules of SMP. Little is known about the effects of SMP as microbially derived precursors on disinfection byproduct formation and speciation in biologically treated wastewater. In addition, there has never been any attempt to directly chlorinate the major biomolecules of SMP. 相似文献992.
Purpose
The most significant application of polychlorinated biphenyls (PCBs) is in transformers and capacitors. Therefore, power plants are important suspected sources for entry of PCBs into the environment. In this context, the levels and distribution of PCBs in sediment, soil, ash, and sludge samples were investigated around Seyitömer thermal power plant, Kütahya, Turkey. Moreover, identity and contribution of PCB mixtures were predicted using the chemical mass balance (CMB) receptor model.Methods
United States Environmental Protection Agency methods were applied during sample preparation, extraction (3540C), cleanup (3660B, 3665A, 3630C), and analysis (8082A).Results
ΣPCB concentrations in the region ranged from not detected to 385 ng/g dry weight, with relatively higher contamination in sediments in comparison to soil, sludge, and ash samples collected from around the power plant. Congener profiles of the sediment and soil samples show penta-, hexa-, and hepta-chlorobiphenyls as the major homolog groups. The results from the CMB model indicate that PCB contamination is largely due to Clophen A60/A40 and Aroclor 1254/1254(late)/1260 release into the sediment and sludge samples around the thermal power plant.Conclusions
Since there are no other sources of PCBs in the region and the identity of PCB sources estimated by the CMB model mirrors PCB mixtures contained in transformers formerly used in the plant, the environmental contamination observed especially in sediments is attributed to the power plant. Release of PCBs over time, as indicated by the significant concentrations observed even in surface samples, emphasizes the importance of the need for better environmental management.993.
Trier X Granby K Christensen JH 《Environmental science and pollution research international》2011,18(7):1108-1120
Introduction
In this study, we explore the identity of a range of polyfluorinated surfactants (PFS) used for food contact materials, primarily to impart oil and water repellency on paper and board. PFS are of interest, as they can be precursors of poly- and perfluorinated alkyl substances (PFAS), of which several are persistent and are found worldwide in human blood and in the environment. 相似文献994.
Burskyte V Belous O Stasiskiene Z 《Environmental science and pollution research international》2011,18(5):716-726
Introduction
In 2003, the Japan International Cooperation Agency carried out a development feasibility study of Klaipeda Seaport (Lithuania). The focus in this study was the evaluation of environmental impacts of the port expansion because it is located in an ecologically sensitive area. While the Japanese researchers focused on the environmental impact analysis, they did not provide unambiguous conclusions. The problems remained unresolved and required further, more detailed consideration and deeper analysis. 相似文献995.
Stefanie Grund Eric Higley René Schönenberger Marc J-F. Suter John P. Giesy Markus Hecker Henner Hollert 《Environmental science and pollution research international》2011,18(3):446-460
Introduction
The present study was part of a comprehensive weight-of-evidence approach with the goal of identifying potential causes for the declines in fish populations, which have been observed during the past decades in the Upper Danube River. 相似文献996.
Jofré MB Antón RI Caviedes-Vidal E 《Environmental science and pollution research international》2011,19(7):2889-2897
Purpose
Heavy metals have been detected in water and sediments from the Embalse La Florida, an artificial lake in the arid region of San Luis province, Argentina, representing one of the few sources of permanent water for reproduction of native anuran species. This study assesses lead (Pb) and cadmium (Cd) concentrations in the anuran species found in this water reservoir as well as differences between compounds, species and sites of collection.Methods
Adult anuran amphibians were collected on the north and south shores of the Embalse La Florida and Pb and Cd concentrations were measured in whole body homogenates digested using wet ashing techniques.Results
All individuals of the six species assayed had detectable levels of Pb and Cd that ranged from 1.19 to 5.57 ??g/g dry mass and from 1.09 to 6.86 ??g/g dry mass, respectively. Anuran amphibians collected in the more contaminated south shore accumulated 21% more Cd and 40% more Pb than individuals from the less altered north shore. Cd and Pb accumulation was not significantly correlated with the concentration in water at the site of collection.Conclusions
Amphibians of the Embalse La Florida accumulate Cd and Pb. Between and within species, differences were detected in Cd and Pb concentrations. Differences in metal concentrations between species, metals, and individuals collected on shores of the Embalse La Florida with different contamination, were detected. Therefore, it is crucial to implement adequate policies to protect amphibians from the accelerated urban development experienced in this location. 相似文献997.
Background, aim, and scope
Ever since the discovery of the mutagenic properties of ionizing radiation, the possibility of birth sex odds shifts in exposed human populations was considered in the scientific community. Positive evidence, however weak, was obtained after the atomic bombing of Japan. We previously investigated trends in the sex odds before and after the Chernobyl Nuclear Power Plant accident. In a pilot study, combined data from the Czech Republic, Denmark, Finland, Germany, Hungary, Norway, Poland, and Sweden between 1982 and 1992 showed a downward trend in the sex odds and a significant jump in 1987, the year immediately after Chernobyl. Moreover, a significant positive association of the sex odds between 1986 and 1991 with Chernobyl fallout at the district level in Germany was observed. Both of these findings, temporality (effect after exposure) and dose response association, yield evidence of causality. The primary aim of this study was to investigate longer time periods (1950–2007) in all of Europe and in the USA with emphasis on the global atmospheric atomic bomb test fallout and on the Chernobyl accident. To obtain further evidence, we also analyze sex odds data near nuclear facilities in Germany and Switzerland. 相似文献998.
Mohanraj R Solaraj G Dhanakumar S 《Environmental science and pollution research international》2011,18(5):764-771
Background
Airborne fine particulates (PM 2.5) and its associated polycyclic aromatic hydrocarbons (PAHs) are reportedly hazardous in urban environment due to the presence of multiple emission sources. 相似文献999.
Ben-Shlomo R Shanas U 《Environmental science and pollution research international》2011,18(8):1264-1269
Purpose
We tested the genetic diversity in wild mice (Mus musculus domesticus) inhabiting the asbestos-polluted area as a model for the long-term mutagenic effect of asbestos. Hazardous effects of deposited asbestos persist in the environment because of low rate of fiber disintegration. The upper layers of the soil in the vicinity of a former asbestos factory are nearly “saturated” with asbestos fibers and dust. Natural populations of mice dwell in this area and are constantly exposed to asbestos fibers. 相似文献1000.
Occurrence of perfluorinated organic acids in the North and Baltic seas. Part 1: distribution in sea water 总被引:1,自引:0,他引:1
Theobald N Caliebe C Gerwinski W Hühnerfuss H Lepom P 《Environmental science and pollution research international》2011,18(7):1057-1069