全文获取类型
收费全文 | 238篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 20篇 |
废物处理 | 8篇 |
环保管理 | 10篇 |
综合类 | 33篇 |
基础理论 | 43篇 |
污染及防治 | 83篇 |
评价与监测 | 27篇 |
社会与环境 | 16篇 |
出版年
2023年 | 8篇 |
2022年 | 6篇 |
2021年 | 9篇 |
2020年 | 4篇 |
2019年 | 12篇 |
2018年 | 13篇 |
2017年 | 20篇 |
2016年 | 14篇 |
2015年 | 10篇 |
2014年 | 13篇 |
2013年 | 34篇 |
2012年 | 14篇 |
2011年 | 15篇 |
2010年 | 12篇 |
2009年 | 7篇 |
2008年 | 7篇 |
2007年 | 3篇 |
2006年 | 6篇 |
2005年 | 8篇 |
2004年 | 7篇 |
2003年 | 8篇 |
2002年 | 4篇 |
2001年 | 2篇 |
2000年 | 1篇 |
1992年 | 1篇 |
1976年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有240条查询结果,搜索用时 46 毫秒
81.
Environmental change challenges local and global survival of populations and species. In a species-poor environment like the
Baltic Sea this is particularly critical as major ecosystem functions may be upheld by single species. A complex interplay
between demographic and genetic characteristics of species and populations determines risks of local extinction, chances of
re-establishment of lost populations, and tolerance to environmental changes by evolution of new adaptations. Recent studies
show that Baltic populations of dominant marine species are locally adapted, have lost genetic variation and are relatively
isolated. In addition, some have evolved unusually high degrees of clonality and others are representatives of endemic (unique)
evolutionary lineages. We here suggest that a consequence of local adaptation, isolation and genetic endemism is an increased
risk of failure in restoring extinct Baltic populations. Additionally, restricted availability of genetic variation owing
to lost variation and isolation may negatively impact the potential for evolutionary rescue following environmental change. 相似文献
82.
Jarzyńska G Gucia M Kojta AK Rezulak K Falandysz J 《Journal of environmental science and health. Part. B》2011,46(8):741-751
The aim of this study was to determine 19 elements contents and bioconcentration potential in fruiting bodies of Parasol Mushroom (Macrolepiota procera) collected from the Tucholskie Forest complex in Poland. Also discussed were Cd, Pb and Hg contents of edible caps in relation to the current regulatory standards. K, P and Mg were particularly abundant in caps and stipes, median values were 38-49, 13, and 1.6-1.6 mg/g dry weight, and followed by Ca, Na and Rb at 110-540, 44-240 and 20-50 μg/g dw, respectively. Concentrations of Al, Fe, Zn, Cu and Mn were from less than 50 to 180 μg/g dw, while concentrations of other elements were ~l.0?μg/g dw or less. Cu, K, Ag, Cd, Na, Rb, Zn and Hg were bioconcentrated (BCF >1), while Al, Ba, Fe, Mn, Co, Sr, Pb and Cr were not bioaccumulated (BCF <1). Cd and Pb content of Parasol Mushroom's edible caps collected from some sites in the Tucholskie Forest exceed the maximum levels set in the EU for cultivated mushrooms. 相似文献
83.
Marek Roszko Marta Kamińska Krystyna Szymczyk Katarzyna Piasecka – Jóźwiak Beata Chabłowska 《Journal of environmental science and health. Part. B》2013,48(10):692-706
ABSTRACTPersistent organic pollutants (POPs) are known to show endocrine disrupting (ED) activity, including interactions with hormone receptors. The aim of this work was to develop a bioassay applicable for evaluation of ED potency of highly lipophilic metabolites of POPs. To that end, a yeast-based bio-assay protocol was used. Estrogenic / androgenic activity of some native brominated biphenyl ethers (BDEs) / chlorinated biphenyls (CBs), and their hydroxylated / methoxylated metabolites was assessed. Since data (including potency compared to reference native hormones) obtained using different protocols vary, the possibility that yeast transforms POPs into some more potent compounds was first checked; it seems that no such transformation is important from the test applicability standpoint. The developed method was sensitive with EC50 values 6.5*10?11 M and 4.5*10?9 M calculated for E2 and DHT, respectively. Both CBs and BDEs show weak estrogenic activity negatively correlated with the degree of their halogenation, but their metabolites are significantly more potent xenohormones. 4-OH-2,2′,4′,6′-TeCB was the most potent estrogen receptor (ER) agonist among all tested compounds; its activity was only 1,000 times lower than that of native E2. 相似文献
84.
Mleczek Mirosław Magdziak Zuzanna Gąsecka Monika Niedzielski Przemysław Kalač Pavel Siwulski Marek Rzymski Piotr Zalicka Sylwia Sobieralski Krzysztof 《Environmental science and pollution research international》2016,23(20):20609-20618
Environmental Science and Pollution Research - The aim of the study was to (i) investigate the potential of edible mushroom Boletus badius (Fr.) Fr. to accumulate 53 elements from unpolluted acidic... 相似文献
85.
Karasu River, which is the only river in the Erzurum plain, is the source of the Euphrates River (Eastern Anatolia of Turkey). The river is in a serious environmental situation as a result of pollution by agricultural and industrial sewage and domestic discharges. The present study aims to evaluate genotoxic effects of toxic metals in chub, Leuciscus cephalus, and transcaucasian barb, Capoeta capoeta, collected from contaminated site of the Karasu River, in comparison with fish from an unpolluted reference site. Heavy metal concentrations in surface water of the river were determined. The condition factor (CF) was taken as a general biomarker of the health of the fish, and genotoxicity assays such as micronucleus (MN) and other nuclear abnormalities (NA) were carried out on the fish species studied. MN and NA such as kidney-shaped nucleus, notched nucleus, binucleated, lobed nucleus, and blebbed nucleus were assessed in peripheral blood erythrocytes, gill epithelial cells, and liver cells of the fish. A significant decrease in CF values associated with a significant elevation in MN and NA frequencies was observed in fish collected from the polluted sites compared with those from the reference site. Results of the current study show the significance of integrating a set of biomarkers to identify the effects of anthropogenic pollution. High concentrations of heavy metals have a potential genotoxic effects, and the toxicity is possibly related to industrial, agricultural, and domestic activities. 相似文献
86.
87.
88.
Magdalena Zielisk Katarzyna Bernat Agnieszka Cydzik-Kwiatkowsk Joanna Sobolewsk Irena Wojnowska-Baryla 《环境科学学报(英文版)》2012,24(6):990-998
The impact of the organic carbon to nitrogen ratio (chemical oxygen demand (COD)/N) in wastewater and dissolved oxygen (DO) concentration on carbon and nitrogen removal efficiency, and total bacteria and ammonia-oxidizing bacteria (AOB) communities in activated sludge in constantly aerated sequencing batch reactors (SBRs) was determined. At DO of 0.5 and 1.5 mg O2/L during the aeration phase, the efficiency of ammonia oxidation exceeded 90%, with nitrates as the main product. Nitrification and denitrification achieved under the same operating conditions suggested the simultaneous course of these processes. The most effective nitrogen elimination (above 50%) was obtained at the COD/N ratio of 6.8 and DO of 0.5 mg O2/L. Total bacterial diversity was similar in all experimental series, however, for both COD/N ratios of 6.8 and 0.7, higher values were observed at DO of 0.5 mg O2/L. The diversity and abundance of AOB were higher in the reactors with the COD/N ratio of 0.7 in comparison with the reactors with the COD/N of 6.8. For both COD/N ratios applied, the AOB population was not affected by oxygen concentration. Amplicons with sequences indicating membership of the genus Nitrosospira were the determinants of variable technological conditions. 相似文献
89.
90.
Gdula-Argasińska J Appleton J Sawicka-Kapusta K Spence B 《Environmental pollution (Barking, Essex : 1987)》2004,131(1):71-79
The content of heavy metals in mineralised dental tissues is an indicator of the exposure of their mineral phase to heavy metals during the time of tooth development and dental tissue formation. Therefore, teeth have been used as bio-indicators which accurately reflect the environmental or dietary exposure of animals and humans to heavy metals. This study follows from the earlier work in which it was demonstrated that the teeth from bank voles inhabiting various environmentally polluted and non-polluted forests in Southern Poland were reliable indicators of exposure to heavy metals. Using analytical techniques employed in the earlier study heavy metal concentrations were obtained in the teeth of bank voles trapped in 1998-2000 to determine if efforts to clean up the environment could be detected in changes in heavy metal concentrations in the teeth. The results show that these efforts are reflected in lower concentrations of heavy metals in the teeth but that cross border contamination remains a problem. 相似文献