全文获取类型
收费全文 | 353篇 |
免费 | 13篇 |
国内免费 | 91篇 |
专业分类
安全科学 | 27篇 |
废物处理 | 23篇 |
环保管理 | 34篇 |
综合类 | 140篇 |
基础理论 | 68篇 |
环境理论 | 1篇 |
污染及防治 | 121篇 |
评价与监测 | 24篇 |
社会与环境 | 8篇 |
灾害及防治 | 11篇 |
出版年
2023年 | 7篇 |
2022年 | 23篇 |
2021年 | 13篇 |
2020年 | 10篇 |
2019年 | 14篇 |
2018年 | 17篇 |
2017年 | 15篇 |
2016年 | 19篇 |
2015年 | 19篇 |
2014年 | 28篇 |
2013年 | 35篇 |
2012年 | 33篇 |
2011年 | 28篇 |
2010年 | 18篇 |
2009年 | 20篇 |
2008年 | 23篇 |
2007年 | 18篇 |
2006年 | 17篇 |
2005年 | 13篇 |
2004年 | 15篇 |
2003年 | 10篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 8篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有457条查询结果,搜索用时 15 毫秒
441.
Purpose
Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) have emerged as contaminants of environmental concerns because they pose potential risks to human and animal health. The purpose of this study was to investigate the in vitro metabolism of OH-PBDEs and their potential inhibition against 17??-estradiol (E2) metabolism.Methods
Rat liver microsomes were used as a source of P450 enzymes in an in vitro metabolism study of OH-PBDEs. Inhibition of E2 metabolism and kinetic study were performed by incubating with rat liver microsomes in the presence of OH-PBDEs.Results
The obtained data clearly demonstrated that OH-PBDEs, especially those congeners with lower bromination, could be metabolized to bromophenol and diOH-PBDEs. The less metabolic rate of OH-PBDEs was observed with the increasing number of bromine substituents. OH-PBDEs with hydroxyl group and bromine adjacent to the ether bridge showed faster metabolic rates. In addition, the results showed non-competitive inhibition of E2 metabolism by OH-PBDEs with IC50 values in the range from 13.7 to 55.2???M. The most potent OH-PBDE inhibitor was found to be 3??-OH-BDE-100. The inhibitory potencies for OH-PBDEs were significantly higher than those of parent PBDE and methoxylated metabolites, providing the evidence that PBDEs exerted estrogenic activity in part by their hydroxylated metabolites.Conclusions
OH-PBDEs exhibited large differences in their capacity to be metabolized and to inhibit E2 metabolism in rat liver microsomes. The finding might increase our understanding of healthy risk associated with PBDEs in human and wildlife. 相似文献442.
Huang DL Zeng GM Feng CL Hu S Zhao MH Lai C Zhang Y Jiang XY Liu HL 《Chemosphere》2010,81(9):1091-1097
Lignocellulosic biomass is an abundant renewable resource difficult to degrade. Its bioconversion plays important roles in carbon cycles in nature, which may be influenced by heavy metals in environment. Mycelial growth and the degradation of lignocellulosic waste by lignin-degrading fungus Phanerochaete chrysosporium under lead stress were studied. It was shown that P. chrysosporium could grow in liquid media with 400 mg L?1 Pb(II), and mycelial dry weight was reduced by 54% compared to the control. Yellow mycelia in irregular short-strip shape formed in Pb-containing media, whereas the control showed ivory-white regular mycelial pellets. Two possible responses to Pb stress were: dense hyphae, and secretion from mycelia to resist Pb. During solid-state fermentation of straw, fungal colonization capability under Pb stress was positively correlated with the removal efficiency of soluble-exchangeable Pb when its content was higher than 8.2 mg kg?1 dry mass. Carboxymethyl cellulase activity and cellulose degradation were inhibited at different Pb concentrations, whereas low Pb concentrations increased xylanase and ligninolytic enzyme activities and the hemicellulose and lignin degradation. Cluster analyses indicated that Pb had similar effects on the different microbial indexes related to lignin and hemicellulose degradation. The present findings will advance the understandings of lignocellulose degradation by fungi under Pb pollution, which could provide useful references for developing metal-polluted waste biotreatment technology. 相似文献
443.
Lai Aolin Yang Zhihui Cui Lianbiao 《Environmental science and pollution research international》2022,29(7):10157-10172
Environmental Science and Pollution Research - While local protectionism and market segmentation owing to fiscal decentralization are not conducive to broad economic development, they may be... 相似文献
444.
Degradation of 3,3′-iminobis-propanenitrile in aqueous solution by Fe0/GAC micro-electrolysis system
The degradation of 3,3′-iminobis-propanenitrile was investigated using the Fe0/GAC micro-electrolysis system. Effects of influent pH value, Fe0/GAC ratio and granular activated carbon (GAC) adsorption on the removal efficiency of the pollutant were studied in the Fe0/GAC micro-electrolysis system. The degradation of 3,3′-iminobis-propanenitrile was affected by influent pH, and a decrease of the influent pH values from 8.0 to 4.0 led to the increase of degradation efficiency. Granular activated carbon was added as cathode to form macroscopic galvanic cells between Fe0 and GAC and enhance the current efficiency of the Fe0/GAC micro-electrolysis system. The GAC could only adsorb the pollutant and provide buffer capacity for the Fe0/GAC micro-electrolysis system, and the macroscopic galvanic cells of the Fe0/GAC micro-electrolysis system played a leading role in degradation of 3,3′-iminobis-propanenitrile. With the analysis of the degradation products with GC–MS, possible reaction pathway for the degradation of 3,3′-iminobis-propanenitrile by the Fe0/GAC micro-electrolysis system was suggested. 相似文献
445.
"绿色经济与可持续发展"是当今人类社会的主题,而任何一种可持续发展的主体都离不开城市。因此,推动城市发展模式向绿色生态城的转变已成为必然趋势。本文以建设绿色生态城为例,主要阐述推进绿色生态城建设的重要意义。同时,重点分析目前国内绿色生态城建设过程中存在的主要问题。最后,对破解绿色瓶颈,推进绿色生态城的建设提出几点建议。 相似文献
446.
Spoors JA Winger LA Siew LK Dessi JL Jennens L Self CH 《Journal of environmental monitoring : JEM》2002,4(6):917-921
To date, no ligand binding assay has been described for the carbamate herbicide asulam, although a variety of physical methods, dependent on pre-concentration of water samples, have been documented for its assessment. However, asulam is increasingly used in sensitive agricultural areas, and statutory regulations concerning its monitoring will undoubtedly become more stringent. Antibodies are optimal partners in ligand binding assays, but it is commonly understood by immunological researchers that where no antibody reactive with a particular antigen has yet been described, the immunogenicity of the antigen may be particularly restricted. By the expedient of employing a specialised approach to final immunisation with an asulam-protein conjugate, prior to the immortalisation of a specific anti-asulam antibody-producing cell, we have succeeded in generating a monoclonal antibody reactive specifically with asulam that can be configured in a convenient immunoassay. This antibody may be used flexibly in a number of ways: small sample volumes of 10 microl can be assessed to sensitivities of 4.35 x 10(-7) M (10 microg L(-1)) while avoiding discrepancies contributed by the assay matrix; this antibody-based assay can also be formatted to deliver sensitivities at levels stipulated by regulatory authorities (e.g., 4.35 x 10(-9) M or 0.1 microg L(-1)) directly from a water sample, without prior pre-concentration. 相似文献
447.
Tao Zeng Shuqi Li Weishun Lai Xinming Jiang Yashuang Wang Xinyi Cai Da Wang Shuang Song Min Liu 《环境科学学报(英文版)》2023,35(2):602-616
Herein, a novel direct Z-scheme photocatalyst was accomplished by hybridization of 0D MoS2 quantum dots (MSQDs) and 3D honeycomb-like conjugated triazine polymers (CTP) (namely, CTP-MSQD). The unique 0D/3D hierarchical structure significantly enhanced the exposure of active sites and light harvesting property, while the formed p-n junction enabled the direct strong interface coupling without the necessity of any mediators. The optimized CTP-MSQD3 exhibited continuously increased visible-light-driven photocatalytic activity and strong durability both in Cr(VI) reduction and H2 evolution, featured a rate of 0.069 min−1 and 1070 µmol/(hr∙g), respectively, which were 8 times than those of pure 3D-CTP (0.009 min−1 and 129 µmol/(hr∙g)). We believe that this work provides a promising photocatalyst system that combines a 0D/3D hierarchical structure and a Z-scheme charge flow for efficient and stable photocatalytic conversion. 相似文献
448.
449.
17β-Estradiol (E2) is an endocrine disrupting chemical of harm to both animals and human beings at a low concentration level (ng/L). It cannot be completely removed by wastewater treatments, and is often detected in both environment and drinking waters. The purpose of this feasibility study, towards environmental engineering in the field of water analysis and treatment, was to remove E2 by extraction using non-imprinted polymer (NIP) submicron particles. Experimental results showed that 0.5 mg/L of E2 could be completely extracted by adding 10 mg of NIP particles directly into 10 mL of water. However, the extraction efficiency decreased to 64% for 100 mL of water. prefilling the NIP particles inside a membrane filter showed a potential for water treatment of a large volume, requiring no effort to distribute the particles uniformly in the water. High extraction efficiency (80 ± 10)% for E2 was achieved for 100 mL of water. A total mass of 0.29 mg E2 was extracted from 1000 mL of water containing 0.8 mg/L E2 (by using only 10 mg of NIP particles). Both efficiency and mass capacity can be increased, by scaling up the amount of NIP particles, towards environmental engineering applications. 相似文献
450.