全文获取类型
收费全文 | 35693篇 |
免费 | 449篇 |
国内免费 | 316篇 |
专业分类
安全科学 | 1367篇 |
废物处理 | 1669篇 |
环保管理 | 5341篇 |
综合类 | 5099篇 |
基础理论 | 9220篇 |
环境理论 | 18篇 |
污染及防治 | 8680篇 |
评价与监测 | 2537篇 |
社会与环境 | 2288篇 |
灾害及防治 | 239篇 |
出版年
2023年 | 160篇 |
2022年 | 308篇 |
2021年 | 372篇 |
2020年 | 258篇 |
2019年 | 323篇 |
2018年 | 540篇 |
2017年 | 613篇 |
2016年 | 896篇 |
2015年 | 673篇 |
2014年 | 1013篇 |
2013年 | 3066篇 |
2012年 | 1268篇 |
2011年 | 1662篇 |
2010年 | 1333篇 |
2009年 | 1418篇 |
2008年 | 1686篇 |
2007年 | 1646篇 |
2006年 | 1478篇 |
2005年 | 1303篇 |
2004年 | 1246篇 |
2003年 | 1189篇 |
2002年 | 1121篇 |
2001年 | 1224篇 |
2000年 | 882篇 |
1999年 | 582篇 |
1998年 | 446篇 |
1997年 | 468篇 |
1996年 | 488篇 |
1995年 | 553篇 |
1994年 | 486篇 |
1993年 | 425篇 |
1992年 | 445篇 |
1991年 | 419篇 |
1990年 | 382篇 |
1989年 | 371篇 |
1988年 | 350篇 |
1987年 | 282篇 |
1986年 | 291篇 |
1985年 | 291篇 |
1984年 | 306篇 |
1983年 | 308篇 |
1982年 | 328篇 |
1981年 | 285篇 |
1980年 | 207篇 |
1979年 | 223篇 |
1978年 | 193篇 |
1977年 | 160篇 |
1975年 | 150篇 |
1973年 | 172篇 |
1972年 | 153篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
Mohamed Zakaria A. Hashem Mohamed Alamri Saad Campos Alexandre Vasconcelos Vitor 《Environmental science and pollution research international》2021,28(28):37041-37050
Environmental Science and Pollution Research - Harmful cyanobacterial blooms (HCB) have severe impacts on marine and freshwater systems worldwide. They cause oxygen depletion and produce potent... 相似文献
992.
Madboli Abd El-Nasser A. Seif Mohamed M. 《Environmental science and pollution research international》2021,28(16):19768-19782
993.
Malki Zohair Atlam El-Sayed Ewis Ashraf Dagnew Guesh Ghoneim Osama A. Mohamed Abdallah A. Abdel-Daim Mohamed M. Gad Ibrahim 《Environmental science and pollution research international》2021,28(30):40496-40506
Environmental Science and Pollution Research - COVID-19 was first discovered in Wuhan, China in December 2019. It is one of the worst pandemics in human history. Recent studies reported that... 相似文献
994.
de Moura Stéfany G. Dauzakier Ligiane C. L. Pereira Leydiane O. Ramalho Teodorico C. de Oliveira Luiz C. A. Magalhães Fabiano 《Environmental science and pollution research international》2021,28(31):42093-42106
Environmental Science and Pollution Research - Water contamination is a common problem, especially considering dyes and drugs disposal. A possible and effective treatment method to remove these... 相似文献
995.
Vicente Estela Domingos Alves Célia A. Martins Vânia Almeida Susana Marta Lazaridis Mihalis 《Environmental science and pollution research international》2021,28(46):65385-65398
Environmental Science and Pollution Research - Residential settings are of utmost importance for human exposure, as it is where people spend most of their time. Residential wood combustion is a... 相似文献
996.
Jesus D. Fernandez-Bayo Juliano Toniato Blake A. Simmons Christopher W. Simmons 《环境科学学报(英文版)》2017,29(6):164-168
Food processing facilities often use antimicrobial quaternary ammonium compound (QAC) sanitizers to maintain cleanliness. These QACs can end up in wastewaters used as feedstock for anaerobic digestion. The aim of this study was to measure the effect of QAC contamination on biogas production and structure of microbial communities in thermophilic digester sludge. Methane production and biogas quality data were analyzed in batch anaerobic digesters containing QAC at 0, 15, 50, 100 and 150 mg/L. Increasing sanitizer concentration in the bioreactors negatively impacted methane production rate and biogas quality. Microbial community composition data was obtained through 16S rRNA gene sequencing from the QAC-contaminated sludges. Sequencing data showed no significant restructuring of the bacterial communities. However, significant restructuring was observed within the archaeal communities as QAC concentration increased. Further studies to confirm these effects on a larger scale and with a longer retention time are necessary. 相似文献
997.
The disinfection of drinking water is an important public health service that generates high quality, safe and palatable tap water. The disinfection of drinking water to reduce waterborne disease was an outstanding public health achievement of the 20th century. An unintended consequence is the reaction of disinfectants with natural organic matter, anthropogenic contaminants and bromide/iodide to form disinfection by-products (DBPs). A large number of DBPs are cytotoxic, neurotoxic, mutagenic, genotoxic, carcinogenic and teratogenic. Epidemiological studies demonstrated low but significant associations between disinfected drinking water and adverse health effects. The distribution of DBPs in disinfected waters has been well defined by advances in high precision analytical chemistry. Progress in the analytical biology and toxicology of DBPs has been forthcoming. The objective of this review was to provide a detailed presentation of the methodology for the quantitative, comparative analyses on the induction of cytotoxicity and genotoxicity of 103 DBPs using an identical analytical biological platform and endpoints. A single Chinese hamster ovary cell line was employed in the assays. The data presented are derived from papers published in the literature as well as additional new data and represent the largest direct quantitative comparison on the toxic potency of both regulated and emerging DBPs. These data may form the foundation of novel research to define the major forcing agents of DBP-mediated toxicity in disinfected water and may play an important role in achieving the goal of making safe drinking water better. 相似文献
998.
Robert Tardif Manuel Rodriguez Cyril Catto Ginette Charest-Tardif Sabrina Simard 《环境科学学报(英文版)》2017,29(8):163-172
The formation and concentration of disinfection by-products (DBPs) in pool water and the ambient air vary according to the type of water treatment process used. This exploratory study was aimed at investigating the short-term impact of modifications of the water treatment process on traditional DBP levels (e.g., trihalomethanes (THMs), chloramines) and emerging DBPs (e.g., Halonitromethanes, Haloketones, NDMA) in swimming pool water and/or air. A sampling program was carried to understand the impact of the following changes made successively to the standard water treatment process: activation of ultraviolet (UV) photoreactor, halt of air stripping with continuation of air extraction from the buffer tank, halt of air stripping and suppression of air extraction from the buffer tank, suppression of the polyaluminium silicate sulfate (PASS) coagulant. UV caused a high increase of Halonitromethanes (8.4 fold), Haloketones (2.1 fold), and THMs in the water (1.7 fold) and, of THMs in the air (1.6 fold) and contributed to reducing the level of chloramines in the air (1.6 fold) and NDMA in the water (2.1 fold). The results highlight the positive impact of air stripping in reducing volatile contaminants. The PASS did not change the presence of DBPs, except for the THMs, which decrease slightly with the use of this coagulant. This study shows that modifications affecting the water treatment process can rapidly produce important and variable impacts on DBP levels in water and air and suggests that implementation of any water treatment process to reduce DBP levels should take into account the specific context of each swimming pool. 相似文献
999.
Jacqueline T. Bangm Jessica L. Reiner Hannes Both Theresa M. Cantu Marco A. Gouws Matthew P. Guillette Jeremy P. Koelmel Wilmien J. Luus-Powell Jan Myburgh Olivia Rynders Joseph R. Sar Willem J. Smit John A. Bowden 《环境科学学报(英文版)》2017,29(11):59-67
This study examined concentrations of 15 perfluoroalkyl acids (PFAAs) in tissues from male Mozambique tilapia (Oreochromis mossambicus) collected at Loskop Dam, Mpumalanga, South Africa in 2014 and 2016. Nine of the 15 PFAAs were detected frequently and were included in statistical analysis and included two of the most commonly known PFAAs, perfluorooctanesulfonic acid (PFOS) (median, 41.6 ng/g) and perfluorooctanoic acid (PFOA) (median, 0.0825 ng/g). Of the tissues measured, plasma (2016 and 2014 median, 22.2 ng/g) contained the highest PFAA burden followed by (in descending order): liver (median, 11.6 ng/g), kidney (median, 9.04 ng/g), spleen (median, 5.92 ng/g), adipose (median, 2.54 ng/g), and muscle (median, 1.11 ng/g). Loskop Dam tilapia have been affected by an inflammatory disease of the adipose tissue known as pansteatitis, so this study also aimed to investigate relationships between PFAA tissue concentrations and incidence of pansteatitis or fish health status. Results revealed that healthy tilapia exhibited an overall higher (p-value < 0.05) PFAA burden than pansteatitis-affected tilapia across all tissues. Further analysis showed that organs previously noted in the literature to contain the highest PFAA concentrations, such as kidney, liver, and plasma, were the organs driving the difference in PFAA burden between the two tilapia groups. Care must be taken in the interpretations we draw from not only the results of our study, but also other PFAA measurements made on populations (human and wildlife alike) under differing health status. 相似文献
1000.
Adrien Brié Ravo Razafimahefa Julie Loutreul Aurélie Robert Christophe Gantzer Nicolas Boudaud Isabelle Bertrand 《Food and environmental virology》2017,9(2):149-158
Heat and free chlorine are among the most efficient and commonly used treatments to inactivate enteric viruses, but their global inactivation mechanisms have not been elucidated yet. These treatments have been shown to affect at least the capsid proteins of viruses and thus may affect the surface properties (i.e. electrostatic charge and hydrophobicity) of such particles. Our aim was to study the effects of heat and free chlorine on surface properties for a murine norovirus chosen as surrogate for human norovirus. No changes in the surface properties were observed with our methods for murine norovirus exposed to free chlorine. Only the heat treatment led to major changes in the surface properties of the virus with the expression of hydrophobic domains at the surface of the particles after exposure to a temperature of 55 °C. No modification of the expression of hydrophobic domains occurred after exposure to 60 °C, and the low hydrophobic state exhibited by infectious and inactivated particles after exposure to 60 °C appeared to be irreversible for inactivated particles only, which may provide a means to discriminate infectious from inactivated murine noroviruses. When exposed to a temperature of 72 °C or to free chlorine at a concentration of 50 mg/L, the genome became available for RNases. 相似文献