全文获取类型
收费全文 | 1006篇 |
免费 | 6篇 |
国内免费 | 10篇 |
专业分类
安全科学 | 18篇 |
废物处理 | 74篇 |
环保管理 | 66篇 |
综合类 | 86篇 |
基础理论 | 224篇 |
环境理论 | 1篇 |
污染及防治 | 355篇 |
评价与监测 | 131篇 |
社会与环境 | 64篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 18篇 |
2022年 | 39篇 |
2021年 | 70篇 |
2020年 | 30篇 |
2019年 | 22篇 |
2018年 | 39篇 |
2017年 | 56篇 |
2016年 | 66篇 |
2015年 | 31篇 |
2014年 | 56篇 |
2013年 | 93篇 |
2012年 | 56篇 |
2011年 | 76篇 |
2010年 | 53篇 |
2009年 | 48篇 |
2008年 | 40篇 |
2007年 | 53篇 |
2006年 | 42篇 |
2005年 | 28篇 |
2004年 | 17篇 |
2003年 | 18篇 |
2002年 | 19篇 |
2001年 | 9篇 |
2000年 | 6篇 |
1999年 | 6篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 3篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1968年 | 1篇 |
1915年 | 1篇 |
排序方式: 共有1022条查询结果,搜索用时 812 毫秒
881.
882.
Md. Humayun Kabir A. M. Abd El-Aty Md. Musfiqur Rahman Hyung Suk Chung Han Sol Lee Sun-Hyang Park Fazil Hacımüftüoğlu Byung-Joon Chang Ho-Chul Shin Jae-Han Shim 《Environmental monitoring and assessment》2017,189(6):302
Amisulbrom formulated as suspension concentrate was applied at the rate recommended for Korean melon to determine the dissipation pattern (at two different sites), the pre-harvest residue limit (PHRL), and risk assessments. Samples collected over 10 days were extracted using liquid-liquid extraction (LLE) and cleaned up with solid-phase extraction (SPE) Florisil cartridge. Residual concentrations were determined using liquid chromatography-ultraviolet detector (LC-UVD) and confirmed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The standard showed good instrument response linearity with a correlation coefficient (R 2) = 0.9999, and the recovery ranged from 87.5 to 93.7%. The dissipation half-life calculated from two different sites were found to be 7.0 and 8.8 days for sites 1 and 2, respectively. A PHRL graph constructed from the data indicated that if the residue levels were less than 0.55–0.59 mg/kg 3 days before harvest or less than 0.61–0.74 mg/kg 7 days before harvest, then they would be lower than the maximum residue limits (MRLs) at harvest. Risk assessments showed that the risk quotient (RQ) was 4.39–3.47% at 0 day, declined to 1.53–1.63% at 10 days. Therefore, the current data indicate that the amisulbrom can be applied safely to Korean melon; hence, it is unlikely to induce adverse health effects in consumers. 相似文献
883.
Peña-García A de Oña Lopez R Espín Estrella A Aznar Dols F Calvo Poyo FJ Molero Mesa E de Oña López J 《Journal of Safety Research》2010,41(5):385-389
Introduction
This article describes one experiment that studied the influence of Daytime Running Lamps (DRL) on pedestrian detection of turn indicators.Method
An experimental device including one DRL and one turn indicator was used in order to determine Visual Reaction Times (VRT) of 148 observers in different situations involving turn indicator activation. Such situations were combinations of three main variables: color of DRL, separation between DRL and Turn Indicator, and observation angle.Results
Significant changes in VRT were found depending on the configurations above, especially the observation angle and the color of DRL. This second result demonstrates that amber DRLs inhibit the detection of Turn Indicators.Impact on industry
One of the main targets of this paper is to recommend that carmakers introduce only white DRLs on new vehicles. We also intend to advise regulatory bodies working on automotive regulation about the consequences of allowing amber DRLs and also about the danger of introducing constrains on the distance between DRL and Turn Indicator without further experimental evidences. 相似文献884.
Environmental Economics and Policy Studies - The literature is abundant with studies analyzing inequality in carbon emissions at the macroeconomic level, but very limited at the household level.... 相似文献
885.
Marta B. Ramalho Alisson F. S. Durães Flaviano O. Silvério 《Journal of environmental science and health. Part. B》2020,55(3):184-192
AbstractCresols are chemical contaminants derivative from phenol which can be found in sewage sludge. However, little attention has been given to monitoring these compounds in environmental matrices in the literature. Thus, the objective of this study was to develop a simple method based on solid-liquid extraction with low temperature purification for determining three cresol isomers in sludge. The quantification of these compounds was performed by gas chromatography coupled to mass spectrometry with a previous derivatization step. After a detailed study, the cresol recovery was higher than 91%, with relative standard deviation lower than 12% and a limit of quantification of 20?μg kg?1. Linearity was achieved between 10 and 90?μg L?1 (R2 > 0.98) with the standard solutions prepared in matrix extracts due to the trouble caused by the matrix effect. The proposed method was applied with success for monitoring cresols in sewage sludge samples coming from six different wastewater treatment plants. All samples showed contamination by cresols, mainly p-cresol with values between 32.3 and 516.9?μg kg?1. The majority of the analyzed samples showed a total sum of the isomers higher than the maximum residue limit established by Brazilian legislation (160?μg kg?1). 相似文献
886.
A. L. S. Schneider D. D. Silva M. C. F. Garcia V. H. Grigull L. P. Mazur S. A. Furlan G. F. Arag?o A. P. T. Pezzin 《Journal of Polymers and the Environment》2010,18(3):401-406
The environmental impact caused by the disposal of plastics has motivated the development of biodegradable materials. Recent
studies showed that supplementation with oleic acid (OA) in cultures producing poly(3-hydroxybutyrate), P(3HB), increased
the polymer productivity. However only few studies have shown the properties and biodegradation profile of the polymer obtained.
This research investigated the influence of OA concentration on the biodegradation of the P(3HB) obtained from cultures of
Cupriavidus necator. The crystallinity of the casting films determined by differential scanning calorimetry (DSC) was reduced from 70% (0 g L−1 of OA) to 52% (3.0 g L−1 of OA). A reduction of 11 °C in the melting temperature was observed with 3.0 g L−1 of OA. The kinetic of biodegradation was: 3.0 > 1.5 > 0.9 > 0.3 > 0 g L−1 of OA. 相似文献
887.
Defining Chlorophyll-a Reference Conditions in European Lakes 总被引:2,自引:0,他引:2
Sandra Poikāne Maria Helena Alves Christine Argillier Marcel van den Berg Fabio Buzzi Eberhard Hoehn Caridad de Hoyos Ivan Karottki Christophe Laplace-Treyture Anne Lyche Solheim José Ortiz-Casas Ingmar Ott Geoff Phillips Ansa Pilke João Pádua Spela Remec-Rekar Ursula Riedmüller Jochen Schaumburg Maria Luisa Serrano Hanna Soszka Deirdre Tierney Gorazd Urbanič Georg Wolfram 《Environmental management》2010,45(6):1286-1298
The concept of “reference conditions” describes the benchmark against which current conditions are compared when assessing the status of water bodies. In this paper we focus on the establishment of reference conditions for European lakes according to a phytoplankton biomass indicator—the concentration of chlorophyll-a. A mostly spatial approach (selection of existing lakes with no or minor human impact) was used to set the reference conditions for chlorophyll-a values, supplemented by historical data, paleolimnological investigations and modelling. The work resulted in definition of reference conditions and the boundary between “high” and “good” status for 15 main lake types and five ecoregions of Europe: Alpine, Atlantic, Central/Baltic, Mediterranean, and Northern. Additionally, empirical models were developed for estimating site-specific reference chlorophyll-a concentrations from a set of potential predictor variables. The results were recently formulated into the EU legislation, marking the first attempt in international water policy to move from chemical quality standards to ecological quality targets. 相似文献
888.
The purpose of this study is to outline the theme of saving energy resources and its relationship with the preservation of the environment, as well as the importance of green marketing in achieving sustainability. The model of data collection was a survey conducted by self-administered questionnaire. After collection, the data were statistically analysed and interpreted. Most individuals claim to be concerned about environmental problems, with 68% of these belonging to the ‘Savers’ group. However, even though they may be concerned with environmental problems, the vast majority of individuals do not have any system of renewable energy in their homes, despite claiming that renewable energies are a viable option for protecting the environment. Women display behaviour that is more favourable to the saving of energy resources than do men. Educational levels are not significant for distinguishing the more pro-environmental individuals from the others. 相似文献
889.
Waste management and environmental protection are mandatory requirements of modern society. In our study, air pollution control (APC) residues from municipal solid waste incinerators (MSWI) were considered as a mixture of fly ash and fine particulate solids collected in scrubbers and fabric filters. These are hazardous wastes and require treatment before landfill. Although there are a number of treatment options, it is highly recommended to find practical applications rather than just dump them in landfill sites. In general, for using a construction material, beyond technical specifications also soil and surface water criteria may be used to ensure environmental protection. The Dutch Building Materials Decree (BMD) is a valuable tool in this respect and it was used to investigate which properties do not meet the threshold criteria so that APC residues can be further used as secondary building material. To this end, some scenarios were evaluated by considering release of inorganic species from unmoulded and moulded applications. The main conclusion is that the high amount of soluble salts makes the APC residues a building material prohibited in any of the conditions tested. In case of moulding materials, the limits of heavy metals are complied, and their use in Category 1 would be allowed. However, also in this case, the soluble salts lead to the classification of "building material not allowed". The treatments with phosphates or silicates are able to solve the problem of heavy metals, but difficulties with the soluble salts are still observed. This analysis suggests that for APC residues to comply with soil and surface water protection criteria to be further used as building material at least a pre-treating for removing soluble salts is absolutely required. 相似文献
890.
Juan Mateo Anchordoquy Juan Patricio Anchordoquy Noelia Nikoloff Rocío Gambaro Gisel Padula Analía Seoane 《Journal of environmental science and health. Part. B》2019,54(2):147-154
The effect of doramectin (DOR) was tested on two experimental somatic bovine cells in vitro: peripheral lymphocytes (PL) and cumulus cells (CC). The cytotoxicity and genotoxicity of DOR were assessed using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay, single cell gel electrophoresis assay (SCGE) and cytokinesis-block micronucleus cytome (CBMN Cyt) assay. Both cells were treated with three concentrations of DOR (20, 40, 60?ng?mL–1) for 24?h. The results obtained from PL demonstrated that DOR was able to induce cytotoxic effect and DNA damage with all concentrations tested. Additionally, DOR increased micronuclei (MNi) frequency and nuclear buds (NBuds) with 20, 40, 60?ng?mL–1, and nucleoplasmic bridges (NPBs) only with 40?ng?mL–1. On the other hand, the three concentrations of DOR were not able to induce cytotoxic effect and DNA damage using SCGE in the bovine CC. Nevertheless, the two higher concentrations of DOR (20, 40?µg mL–1) significantly increased the frequency of micronucleus formation in bovine CC. These results represent the first experimental evidence of genotoxic and cytotoxic effects exerted by DOR on bovine PL and CC. 相似文献