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131.
Mathieu Muller Sihem Bouguelia Romy-Alice Goy Alison Yoris Jeanne Berlin Perrine Meche Vincent Rocher Sharon Mertens Yves Dudal 《Environmental science and pollution research international》2014,21(23):13642-13645
BOD5 dates back to 1912 when the Royal Commission decided to use the mean residence time of water in the rivers of England, 5 days, as a standard to measure the biochemical oxygen demand. Initially designed to protect the quality of river waters from extensive sewage discharge, the use of BOD5 has been quickly extended to waste water treatment plants (WWTPs) to monitor their efficiency on a daily basis. The measurement has been automatized but remains a tedious, time- and resource-consuming analysis. We have cross-validated a surrogate BOD5 method on two sites in France and in the USA with a total of 109 samples. This method uses a fluorescent redox indicator on a 96-well microplate to measure microbial catabolic activity for a large number of samples simultaneously. Three statistical tests were used to compare surrogate and reference methods and showed robust equivalence. 相似文献
132.
Doumas Patrick Munoz Marguerite Banni Mohamed Becerra Sylvia Bruneel Odile Casiot Corinne Cleyet-Marel Jean-Claude Gardon Jacques Noack Yves Sappin-Didier Valérie 《Regional Environmental Change》2018,18(3):677-692
Regional Environmental Change - Abandoned mines are a recurrent problem for nearby communities in Mediterranean regions because mine tailings represent a major source of polymetallic contamination.... 相似文献
133.
Diversity shift in bacterial phenol hydroxylases driven by alkyl-phenols in oil refinery wastewaters
Harzallah Besma Bousseboua Hacène Jouanneau Yves 《Environmental science and pollution research international》2017,24(16):14376-14386
Environmental Science and Pollution Research - Phenol hydroxylases (PHs) play a primary role in the bacterial degradation of phenol and alkylphenols. They are divided into two main classes,... 相似文献
134.
Oxidative injury and antioxidant genes regulation in cadmium-exposed radicles of six contrasted Medicago truncatula genotypes 总被引:1,自引:0,他引:1
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136.
Maëlle Connan Patrick Mayzaud Guy Duhamel Bo T. Bonnevie Yves Cherel 《Marine Biology》2010,157(10):2303-2316
Fatty acid (FA) and fatty alcohol (FAlc) compositions of both total lipid and neutral lipid fractions were studied for five
myctophid species sampled in Kerguelen waters. Both qualitative and quantitative FA signature analyses were then performed
to investigate their diet over longer time scales than the conventional stomach content analysis. Regarding their lipid class,
FA and FAlc compositions, the five species could be discriminated into two groups: wax-ester-rich species (Electrona antarctica, Krefftichthys anderssoni) characterised by large amounts of monounsaturated FAs (>73% of total FAs) and triacylglycerol-rich species (Electrona carlsbergi, Gymnoscopelus nicholsi, Protomyctophum bolini) with major amounts of saturated and monounsaturated FAs (>29 and >46% of total FAs, respectively). Qualitative and quantitative
FA analyses showed that K. anderssoni mainly preyed upon copepods, E. antarctica upon copepods and more euphausiids and P. bolini and E. carlsbergi mainly upon euphausiids with some copepods, while G. nicholsi had a more diverse diet. This study shows the usefulness of quantitative statistical analysis to determine the diet of Antarctic
and sub-Antarctic predators and stresses the need of increasing the lipid and FA analyses of more zooplanktonic and micro-nektonic
marine species. 相似文献
137.
James M. Skeaff Yves Thibault David J. Hardy 《Environmental monitoring and assessment》2011,177(1-4):165-192
Base metal smelters may be a source of particulates containing metals of environmental concern released to the atmosphere. Knowledge of the quantitative chemical speciation of particulate releases from base metal smelters will be of value in smelter emission fingerprinting, site-specific risk assessments, predictions of the behaviour of smelter stack particulates released to the environment and in resolving liability issues related to current and historic releases. Accordingly, we have developed an innovative approach comprising bulk chemical analysis, a leaching procedure, X-ray diffraction analysis and scanning electron microscopy/electron probe microanalysis characterisation in a step-wise apportioning procedure to derive the quantitative speciation of particulate samples from the stacks of three copper smelters designated as A, B and C. For the A smelter stack particulates, the major calculated percentages were 29 CuSO4, 20 ZnSO4.H2O, 13 (Cu0.94Zn0.06)2(AsO4)(OH), 11 PbSO4 and four As2O3. For the B smelter stack particulates, the primary calculated percentages were 20 ZnSO4.H2O, 20 PbSO4, 12 CuSO4 and nine As2O3. Finally, we calculated that the C smelter stack particulates mostly comprised 34 ZnSO4.H2O, 19 (Cu0.84Zn0.16)(AsO3OH), 11 PbSO4, 10 As2O3 and nine Zn3(AsO4)2. Between 56% and 67% by weight of the smelter stack particulates, including the As, was soluble in water. For these and other operations, the data and approach may be useful in estimating metals partitioning among water, soil and sediment, as well as predictions of the effects of the stack particulates released to the environment. 相似文献
138.
Cattaneo A Couillard Y Wunsam S Fortin C 《Journal of environmental monitoring : JEM》2011,13(3):572-582
We studied the response of benthic diatoms to recent metal contamination in littoral cores collected at 25 sites in 11 lakes situated at different distances from a smelter in the Rouyn-Noranda mining region (Quebec). Diatom response was described in terms of density, diversity, and taxonomic composition of the entire assemblages and as abundance of individual indicator taxa. Metal concentrations were measured in sediment and in the overlying water (as total dissolved and as free-ions). Sediment metal contamination was significantly higher in lakes located <10 km from the smelters than in lakes farther away. Such difference was not significant when metal concentrations in the overlying water were considered. Metal contamination did not affect diatom density, which indeed was highest in the most contaminated lake. Diversity (either measured as number of taxa or as Shannon and evenness indices) was instead significantly higher in lakes close to the smelter than elsewhere. Redundancy analysis indicated that diatom composition changed along a gradient in alkalinity (CO?) and one in sediment metal contamination (Cd, Hg, Cu). We identified three diatom taxa (Fragilaria construens var. venter, F. construens var. pumila, and Brachysira vitrea) that increased in relative and absolute abundance with metal contamination. Benthic diatom responses at the community (density, diversity, assemblage composition) and population levels (abundance of selected benthic taxa) were stronger to the sediment metal contamination than to the contamination of overlying water. Comparisons with available literature indicated that, for monitoring recent sediment contamination, diatoms in littoral sediments are preferable to invertebrates that mostly respond to overlying water. Diatoms in littoral cores are therefore unique as tools for monitoring recent contamination of lake sediments. 相似文献
139.
140.
Cytomegalovirus is the main cause of congenital viral infection and amniotic fluid viral load appears to be the single nonclinical prognostic factor. However, as in other infectious diseases, host genetics may influence the severity of the disease. To test this hypothesis, we looked retrospectively at the fetal gender in cases of severe congenital cytomegalovirus infection in our database. We also analyzed the international English literature covering this subject between 1985 and 2003. The proportion of females with brain abnormalities was statistically different from that of males (62/258: 24% vs 30/251: 12%, p = 0.004). The risk of abnormal brain development in infected fetuses was twice as high in females than in males (Chi2 = 8.7; OR = 2, IC [1.26–3.21]). In our cases, amniotic fluid CMV DNA load was not significantly higher in males than in females (p = 0.06) and was also similar in severely and non-severely infected fetuses (p = 0.09). Copyright © 2005 John Wiley & Sons, Ltd. 相似文献