全文获取类型
收费全文 | 15217篇 |
免费 | 57篇 |
国内免费 | 22篇 |
专业分类
安全科学 | 87篇 |
废物处理 | 1126篇 |
环保管理 | 1614篇 |
综合类 | 1716篇 |
基础理论 | 4239篇 |
环境理论 | 9篇 |
污染及防治 | 3764篇 |
评价与监测 | 1493篇 |
社会与环境 | 1233篇 |
灾害及防治 | 15篇 |
出版年
2023年 | 71篇 |
2022年 | 172篇 |
2021年 | 218篇 |
2020年 | 83篇 |
2019年 | 84篇 |
2018年 | 1571篇 |
2017年 | 1484篇 |
2016年 | 1413篇 |
2015年 | 294篇 |
2014年 | 367篇 |
2013年 | 592篇 |
2012年 | 825篇 |
2011年 | 1643篇 |
2010年 | 957篇 |
2009年 | 794篇 |
2008年 | 1181篇 |
2007年 | 1540篇 |
2006年 | 309篇 |
2005年 | 244篇 |
2004年 | 214篇 |
2003年 | 223篇 |
2002年 | 245篇 |
2001年 | 98篇 |
2000年 | 78篇 |
1999年 | 56篇 |
1998年 | 34篇 |
1997年 | 21篇 |
1996年 | 14篇 |
1995年 | 35篇 |
1994年 | 22篇 |
1993年 | 15篇 |
1992年 | 12篇 |
1991年 | 12篇 |
1990年 | 15篇 |
1989年 | 9篇 |
1984年 | 11篇 |
1983年 | 11篇 |
1967年 | 9篇 |
1966年 | 13篇 |
1965年 | 16篇 |
1964年 | 31篇 |
1963年 | 12篇 |
1962年 | 17篇 |
1961年 | 11篇 |
1960年 | 9篇 |
1959年 | 27篇 |
1958年 | 37篇 |
1957年 | 20篇 |
1956年 | 14篇 |
1955年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Ramos-Gómez J Coz A Viguri JR Luque A Martín-Díaz ML DelValls TÁ 《Environmental pollution (Barking, Essex : 1987)》2011,159(7):1914-1922
Biomarkers comprising activities of biotransformation enzymes (ethoxyresorufin-O-deethylase -EROD-, dibenzylfluorescein dealkylase -DBF-, glutathione S-transferase -GST), antioxidant enzymes (glutathione reductase -GR- and glutathione peroxidase -GPX), lipid peroxidation -LPO- and DNA strand breaks were analyzed in the clam Ruditapes philippinarum caged at Cádiz Bay, Santander Bay and Las Palmas de Gran Canaria (LPGC) Port (Spain). Sediments were characterized. Digestive gland was the most sensitive tissue to sediment contamination. In Cádiz Bay, changes in LPO regarding day 0 were related with metals. In LPGC Port, DBF, EROD, and GST activity responses suggested the presence of undetermined contaminants which might have led to DNA damage. In Santander Bay, PAHs were related with EROD activity, organic and metal contamination was found to be associated with GR and GST activities and DNA damage presented significant (p < 0.05) induction. R. philippinarum was sensitive to sediment contamination at biochemical level. Biomarkers allowed chemical exposure and sediment quality assessment. 相似文献
962.
Fernández-Macho J 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):2947-2953
Underlying levels of atmospheric pollutants, assumed to be governed by smoothing mechanisms due to atmospheric dispersion, can be estimated from global emissions source databases on greenhouse gases and ozone-depleting compounds. However, spatial data may be contaminated with noise or even missing or zero-valued at many locations. Therefore, a problem that arises is how to extract the underlying smooth levels. This paper sets out a structural spatial model that assumes data evolve across a global grid constrained by second-order smoothing restrictions. The frequency-domain approach is particularly suitable for global datasets, reduces the computational burden associated with two-dimensional models and avoids cumbersome zero-inflated skewed distributions. Confidence intervals of the underlying levels are also obtained. An application to the estimation of global levels of atmospheric pollutants from anthropogenic emissions illustrates the technique which may also be useful in the analysis of other environmental datasets of similar characteristics. 相似文献
963.
Real C Ángel Fernández J Aboal JR Carballeira A 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):2797-2800
Multivariate analysis of environmental data sets requires the absence of missing values or their substitution by small values. However, if the data is transformed logarithmically prior to the analysis, this solution cannot be applied because the logarithm of a small value might become an outlier. Several methods for substituting the missing values can be found in the literature although none of them guarantees that no distortion of the structure of the data set is produced. We propose a method for the assessment of these distortions which can be used for deciding whether to retain or not the samples or variables containing missing values and for the investigation of the performance of different substitution techniques. The method analyzes the structure of the distances among samples using Mantel tests. We present an application of the method to PCDD/F data measured in samples of terrestrial moss as part of a biomonitoring study. 相似文献
964.
Kacániová M Fatrcová-Sramková K Nozková J Melich M Kadasi-Horáková M Knazovická V Felsöciová S Kunová S Máriássyová M 《Journal of environmental science and health. Part. B》2011,46(1):92-96
The purpose of the study was to examine the antiradical activity of 11 natural honeys and to evaluate the antifungal properties of honey. Honey samples (10) were collected from different locations of Slovak Republic. Honeys were native to different plant species of Robinia pseudoacaccia, Brassica napus subs. napus, Castanea sativa Mill. Thymus serpyllum vulgaris and the other samples had multifloral origin. The low antiradical activitity in honey samples was determined. The best results were found in thyme honey from Rhodos (11.84 %) and Castanea honey from Nitra (10.61 %). The lowest antiradical activity was found in Acacia honey and determined to be 7.62 %. Statistically significant differences (P< 0.001) were found among thyme/Rhodos and Castanea/Nitra. The antifungal activities of honey samples were tested by 10 %, 25 % and 50 % (by mass per volume) concentration against fungi Penicillium crustosum, P. expansum, P. griseofulvum, P. raistrickii and P. verrucosum and by the agar well diffusion method. The solutions containing 10 % (by mass per volume) of honey did not have any effect on the growth of fungi. The strongest antifungal effect was shown by 50 % honey concentration against P. raistrickii. 相似文献
965.
Giloteaux L Solé A Esteve I Duran R 《Environmental science and pollution research international》2011,18(7):1147-1159
Introduction
A Microcoleus sp. consortium, obtained from the Ebro delta microbial mat, was maintained under different conditions including uncontaminated, lead-contaminated, and acidic conditions. 相似文献966.
Kabra AN Khandare RV Kurade MB Govindwar SP 《Environmental science and pollution research international》2011,18(8):1360-1373
Purpose
The dyes and dye stuffs present in effluents released from textile dyeing industries are potentially mutagenic and carcinogenic. Phytoremediation technology can be used for remediating sites contaminated with such textile dyeing effluents. The purpose of the work was to explore the potential of Glandularia pulchella (Sweet) Tronc. to decolorize different textile dyes, textile dyeing effluent, and synthetic mixture of dyes. 相似文献967.
Mladenova EK Dakova IG Karadjova IB 《Environmental science and pollution research international》2011,18(9):1633-1643
Purpose
Chitosan membranes (non-crosslinked, crosslinked, and modified with l-cysteine) were evaluated as sorbents prior to electrothermal atomic absorption spectrometry (ETAAS) determination of total dissolved metal content in surface water samples. 相似文献968.
Trier X Nielsen NJ Christensen JH 《Environmental science and pollution research international》2011,18(8):1422-1432
Introduction
In this study, we provide strategies for detecting and quantifying the structural isomers of polyfluorinated di- and tri-alkyl surfactants (PFAS) by mass spectrometry (MS). We specifically investigate polyfluorinated dialkylated phosphate ester surfactants (x:2/y:2 diPAPS, (F(CF2) x CH2CH2O-P(O)(O)−-OCH2CH2(CF2) y F)) and their thioether analogues (x:2/y:2 S-diPAPS, F(CF2) x CH2CH2SCH2-C[CH2O)2P(O)(O)−]-CH2SCH2CH2(CF2) y F), which are used for industrial applications, such as oil- and water-repellent coatings on paper and board. DiPAPS have been found in human blood and are metabolised to the persistent perfluoroalkyl carboxylic acids (PFCA) in rats. 相似文献969.
Khani MH 《Environmental science and pollution research international》2011,18(5):790-799
Introduction
The application of response surface methodology is presented for optimizing the removal of U ions from aqueous solutions using Padina sp., a brown marine algal biomass. 相似文献970.
Spectrofluorimetric study of the ageing of mixtions used in the gildings of mediaeval wall paintings
Mounier A Belin C Daniel F 《Environmental science and pollution research international》2011,18(5):772-782