全文获取类型
收费全文 | 377篇 |
免费 | 2篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 23篇 |
环保管理 | 46篇 |
综合类 | 156篇 |
基础理论 | 61篇 |
环境理论 | 3篇 |
污染及防治 | 70篇 |
评价与监测 | 13篇 |
社会与环境 | 6篇 |
灾害及防治 | 1篇 |
出版年
2022年 | 4篇 |
2020年 | 4篇 |
2018年 | 7篇 |
2017年 | 11篇 |
2016年 | 8篇 |
2015年 | 7篇 |
2013年 | 22篇 |
2012年 | 9篇 |
2011年 | 14篇 |
2010年 | 10篇 |
2009年 | 15篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 5篇 |
2005年 | 9篇 |
2004年 | 4篇 |
2003年 | 8篇 |
2002年 | 16篇 |
2000年 | 4篇 |
1999年 | 9篇 |
1998年 | 6篇 |
1996年 | 13篇 |
1995年 | 5篇 |
1994年 | 6篇 |
1993年 | 4篇 |
1991年 | 7篇 |
1990年 | 9篇 |
1989年 | 7篇 |
1987年 | 3篇 |
1983年 | 5篇 |
1982年 | 3篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 5篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1973年 | 8篇 |
1971年 | 3篇 |
1969年 | 3篇 |
1965年 | 5篇 |
1964年 | 3篇 |
1963年 | 5篇 |
1962年 | 3篇 |
1961年 | 6篇 |
1960年 | 4篇 |
1959年 | 3篇 |
1958年 | 5篇 |
1957年 | 6篇 |
1954年 | 5篇 |
排序方式: 共有387条查询结果,搜索用时 0 毫秒
141.
Rogers F Arnott P Zielinska B Sagebiel J Kelly KE Wagner D Lighty JS Sarofim AF 《Journal of the Air & Waste Management Association (1995)》2005,55(5):583-593
Particulate-phase exhaust properties from two different types of ground-based jet aircraft engines--high-thrust and turboshaft--were studied with real-time instruments on a portable pallet and additional time-integrated sampling devices. The real-time instruments successfully characterized rapidly changing particulate mass, light absorption, and polycyclic aromatic hydrocarbon (PAH) content. The integrated measurements included particulate-size distributions, PAH, and carbon concentrations for an entire test run (i.e., "run-integrated" measurements). In all cases, the particle-size distributions showed single modes peaking at 20-40nm diameter. Measurements of exhaust from high-thrust F404 engines showed relatively low-light absorption compared with exhaust from a turboshaft engine. Particulate-phase PAH measurements generally varied in phase with both net particulate mass and with light-absorbing particulate concentrations. Unexplained response behavior sometimes occurred with the real-time PAH analyzer, although on average the real-time and integrated PAH methods agreed within the same order of magnitude found in earlier investigations. 相似文献
142.
143.
Fabian Wagner Markus Amann Jens Borken-Kleefeld Janusz Cofala Lena Höglund-Isaksson Pallav Purohit Peter Rafaj Wolfgang Schöpp Wilfried Winiwarter 《Sustainability Science》2012,7(2):169-184
Using the GAINS (Greenhouse Gas–Air Pollution Interactions and Synergies) model, we derived Annex I marginal abatement cost curves for the years 2020 and 2030 for three World Energy Outlook baseline scenarios (2007–2009) of the International Energy Agency. These cost curves are presented by country, by greenhouse gas and by sector. They are available for further inter-country comparisons in the GAINS Mitigation Efforts Calculator—a free online tool. We illustrate the influence of the baseline scenario on the shape of mitigation cost curves, and identify key low cost options as well as no-regret priority investment areas for the years 2010–2030. Finally, we show the co-effect of GHG mitigation on the emissions of local air pollutants and argue that these co-benefits offer strong local incentives for mitigation. 相似文献
144.
Justin A. Pals Elizabeth D. Wagner Michael J. Plew Menghang Xi Matias S. Attene-Ramos 《环境科学学报(英文版)》2017,29(8):224-230
Haloacetamides(HAMs) are cytotoxic, genotoxic, and mutagenic byproducts of drinking water disinfection. They are soft electrophilic compounds that form covalent bonds with the free thiol/thiolate in cysteine residues through an S_N2 reaction mechanism.Toxicity of the monohalogenated HAMs(iodoacetamide, IAM; bromoacetamide, BAM;or chloroacetamide, CAM) varied depending on the halogen substituent. The aim of this research was to investigate how the halogen atom affects the reactivity and toxicological properties of HAMs, measured as induction of oxidative/electrophilic stress response and genotoxicity. Additionally, we wanted to determine how well in silico estimates of electrophilic softness matched thiol/thiolate reactivity and in vitro toxicological endpoints.Each of the HAMs significantly induced nuclear Rad51 accumulation and ARE signaling activity compared to a negative control. The rank order of effect was IAM BAM CAM for Rad51, and BAM ≈ IAM CAM for ARE. In general, electrophilic softness and in chemico thiol/thiolate reactivity provided a qualitative indicator of toxicity, as the softer electrophiles IAM and BAM were more thiol/thiolate reactive and were more toxic than CAM. 相似文献
145.
Samuel Barsanelli Costa Roberto Wagner Louren?o 《Environmental monitoring and assessment》2011,172(1-4):329-337
Noise mapping has been used as an instrument for assessment of environmental noise, helping to support decision making on urban planning. In Brazil, urban noise is not yet recognized as a major environmental problem by the government. Besides, cities that have databases to drive acoustic simulations, making use of advanced noise mapping systems, are rare. This study sought an alternative method of noise mapping through the use of geoprocessing, which is feasible for the Brazilian reality and for other developing countries. The area chosen for the study was the central zone of the city of Sorocaba, located in São Paulo State, Brazil. The proposed method was effective in the spatial evaluation of equivalent sound pressure level. The results showed an urban area with high noise levels that exceed the legal standard, posing a threat to the welfare of the population. 相似文献
146.
147.
The metabolism of Benzyl-U-14C-labeled Baythroid, a pyrethroid insecticide, performed in callus and suspension culture of tomatoes, cotton, apples, carrots, potatoes, peanuts, and wheat. The main part of the research was on tomato cell cultures. The main degradation products identified were glucose conjugates of 3-phenoxy-4-fluorobenzylalcohol, 3-phenoxy-4-fluorobenzoic acid and a more polar metabolite assumed to be a disaccharid conjugate of these compounds. In addition a carboxylic acid amide metabolite was formed from Baythroid by hydrolysis of its α-cyano group. 相似文献
148.
149.
150.
Ten samples of Austrian mineral water were investigated with regard to the natural radionuclides (228)Ra, (226)Ra, (210)Pb, (210)Po, (238)U and (234)U. The radium isotopes as well as (210)Pb were measured by liquid scintillation counting (LSC) after separation on a membrane loaded with element-selective particles (Empore Radium Disks) and (210)Po was determined by alpha-spectroscopy after spontaneous deposition onto a copper planchette. Uranium was determined by ICP-MS as well as by alpha-spectroscopy after ion separation and microprecipitation with NdF(3). From the measured activity concentrations the committed effective doses for adults and babies were calculated and compared to the total indicative dose of 0.1 mSv/a given in the EC Drinking Water Directive as a maximum dose. The dominant portion of the committed effective dose was due to the radium isotopes; the dose from (228)Ra in most samples clearly exceeded the dose from (226)Ra. 相似文献