全文获取类型
收费全文 | 4129篇 |
免费 | 36篇 |
国内免费 | 16篇 |
专业分类
安全科学 | 45篇 |
废物处理 | 272篇 |
环保管理 | 255篇 |
综合类 | 657篇 |
基础理论 | 854篇 |
环境理论 | 4篇 |
污染及防治 | 1459篇 |
评价与监测 | 378篇 |
社会与环境 | 248篇 |
灾害及防治 | 9篇 |
出版年
2023年 | 45篇 |
2022年 | 127篇 |
2021年 | 125篇 |
2020年 | 46篇 |
2019年 | 53篇 |
2018年 | 150篇 |
2017年 | 110篇 |
2016年 | 206篇 |
2015年 | 115篇 |
2014年 | 234篇 |
2013年 | 395篇 |
2012年 | 254篇 |
2011年 | 249篇 |
2010年 | 195篇 |
2009年 | 142篇 |
2008年 | 235篇 |
2007年 | 239篇 |
2006年 | 217篇 |
2005年 | 146篇 |
2004年 | 127篇 |
2003年 | 111篇 |
2002年 | 100篇 |
2001年 | 60篇 |
2000年 | 45篇 |
1999年 | 38篇 |
1998年 | 15篇 |
1997年 | 14篇 |
1996年 | 8篇 |
1995年 | 24篇 |
1994年 | 16篇 |
1993年 | 13篇 |
1992年 | 8篇 |
1991年 | 8篇 |
1990年 | 11篇 |
1989年 | 9篇 |
1970年 | 6篇 |
1967年 | 7篇 |
1966年 | 11篇 |
1965年 | 15篇 |
1964年 | 28篇 |
1963年 | 12篇 |
1962年 | 17篇 |
1961年 | 11篇 |
1960年 | 9篇 |
1959年 | 26篇 |
1958年 | 25篇 |
1957年 | 17篇 |
1956年 | 13篇 |
1955年 | 18篇 |
1954年 | 7篇 |
排序方式: 共有4181条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
Marta Diez-Valcarce Petros Kokkinos Kirsi S?derberg Martijn Bouwknegt Kris Willems Ana Maria de Roda-Husman Carl-Henrik von Bonsdorff Maria Bellou Marta Hernández Leena Maunula Apostolos Vantarakis David Rodríguez-Lázaro 《Food and environmental virology》2012,4(2):73-80
In this study, the prevalence of different enteric viruses in commercial mussels was evaluated at the retail level in three European countries (Finland, Greece and Spain). A total of 153 mussel samples from different origins were analysed for human norovirus (NoV) genogroups I and II, hepatitis A virus (HAV) and hepatitis E virus (HEV). Human adenovirus (HAdV) was also tested as an indicator of human faecal contamination. A full set of controls (such as sample process control, internal amplification controls, and positive and negative controls) were implemented during the process. The use of a sample process control allowed us to calculate the efficiencies of extraction, which ranged from 79 to 0.5?%, with an average value of 10?%. Samples were positive in 41?% of cases, with HAdV being the most prevalent virus detected (36?%), but no significant correlation was found between the presence of HAdV and human NoV, HAV and HEV. The prevalences of human norovirus genogroup II, HEV and human NoV genogroup I were 16, 3 and 0.7?%, respectively, and HAV was not detected. The estimated number of PCR detectable units varied between 24 and 1.4?×?103?g?1 of digestive tract. Interestingly, there appeared to be a significant association between the type of mussel species (M. galloprovincialis) and the positive result of samples, although a complete overlap between country and species examined required this finding to be confirmed including samples of both species from all possible countries of origin. 相似文献
995.
Isabel-María García-Sánchez José-Manuel Prado Lorenzo 《Journal of Cleaner Production》2009,17(11):1039-1051
The process of raising public awareness around the world concerning the need to apply criteria of sustainable development was basically set in motion at the Rio de Janeiro Summit in 1992. There it was decided that the most suitable context for fostering the process is the local level, and the Local Action Plan forms a basic element in this process.Some preliminary studies have shown the evidence of great advancement in the creation of Local Action Plans in municipalities. However, their execution is frequently paralyzed by a lack of necessary resources and suitable State policies.The aim of this paper is to verify the effect that different factors might have on the degree of progress made by the Local Action Plan in the municipalities of the European Union.The results show that the public works policies of the EU and the governments of the member states fail to impact the level of commitment of municipal governments; however, when the supporting policy originates from administrations closer to the municipality and are made concrete in the form of economic support and technical advice, they prove to be relevant. Strictly political factors, such as stability, have a more limited yet significant effect on the execution of Local Action Plans. 相似文献
996.
997.
Lumbaque Elisabeth Cuervo Schweigert Cálita Elis dos Santos Leonardo Oliveira Lavayen Vladimir dos Santos João Henrique Zimnoch Sirtori Carla 《Environmental science and pollution research international》2021,28(19):24124-24137
Environmental Science and Pollution Research - Pharmaceuticals, such as dipyrone (DIP), paracetamol (PCT), and propranolol (PPN), are widely used analgesics and beta-blockers with the greatest... 相似文献
998.
Matys Grygar Tomáš Faměra Martin Hošek Michal Elznicová Jitka Rohovec Jan Matoušková Šárka Navrátil Tomáš 《Environmental science and pollution research international》2021,28(37):51183-51198
Environmental Science and Pollution Research - Willows, woody plants of genus Salix common in floodplains of temperate regions, act as plant pumps and translocate the Cd and Zn in the soil profiles... 相似文献
999.
AbstractObjective: It is well established within the traffic psychology literature that a distinction can be made between driving skill and driving style. The majority of self-report questionnaires have been developed for car drivers, whereas only limited knowledge exists on the riding skill and style of cyclists. Individual differences in cycling skills need to be understood in order to apply targeted interventions.Methods: This study reports on a psychometric analysis of the Cycling Skill Inventory (CSI), a self-report questionnaire that asks cyclists to rate themselves from definitely weak to definitely strong on 17 items. Herein, we administered the CSI using an online crowdsourcing method, complemented with respondents who answered the questionnaire using paper and pencil (n?=?1,138 in total). Our analysis focuses on understanding the major sources of variance of the CSI and its correlates with gender, age, exposure, and self-reported accident involvement as a cyclist.Results: The results showed that 2 components underlie the item data: Motor–tactical skills and safety motives. Correlational analyses indicated that participants with a higher safety motives score were involved in fewer self-reported cycling accidents in the past 3 years. The analysis also confirmed well-established gender differences, with male cyclists having lower safety motives but higher motor–tactical skills than female cyclists.Conclusions: The nomological network of the CSI for cyclists is similar to that of the Driving Skill Inventory for car drivers. Safety motives are a predictor of self-reported accident involvement among cyclists. 相似文献
1000.
Nicolás-López Porfirio Macías-Cruz Ulises Avendaño-Reyes Leonel Valadez-García Karen M. Mellado Miguel Meza-Herrera Cesar A. Díaz-Molina Raúl Castañeda Vielka J. Vicente-Pérez Ricardo Luna-Palomera Carlos 《Environmental science and pollution research international》2023,30(5):11562-11571
Environmental Science and Pollution Research - Free ferulic acid (FA) is a natural compound with antioxidant properties which mitigates the negative effects of cold stress in sheep; however, its... 相似文献