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41.
The relative roles of the fish lateral line and inner ear for the perception of hydrodynamic stimuli are poorly investigated.
Here, we studied responsiveness to a 100 Hz vibrating sphere (dipole stimulus) of goldfish and oscars, two species that differ
in peripheral lateral line morphology, inner ear morphology, mechanical linkage between inner ear and swim bladder, and inner
ear sensitivity. We measured unconditioned dipole-evoked changes in breathing activity in still water and in the presence
of a 5-cm s−1 background flow. In still water, individuals from both species responded to sound pressure levels (SPLs) between 92 and 109 dB
SPL re 1 μPaRMS. Responsiveness was not affected by background flow or by temporary inactivation of the lateral line. The data suggest that
fish with different lateral line and inner ear morphologies have similar sensitivities to vibrating sphere stimuli and can
detect and respond to dipole sources equally well in still water and in moderate background flows. Moreover, behavioral responses
were not dependent on a functional lateral line, suggesting that in this type of experiment, the inner ear is the dominant
sense organ for the perception of hydrodynamic stimuli. 相似文献
42.
Hammami Mohammad Bakri Alaa Mohammed Eman Qasem Hashem Anas Mohammad Al-Khafaji Mina Amer Alqahtani Fatima Alzaabi Shaikha Dash Nihar 《Environmental science and pollution research international》2017,24(25):20626-20633
Environmental Science and Pollution Research - Since the industrial revolution in the 1800s, plastic pollution is becoming a global reality. This study aims to assess knowledge and attitude about... 相似文献
43.
Wafa Kharroubi Madiha Dhibi Zohra Haouas Imed Chreif Fadoua Neffati Mohamed Hammami Rachid Sakly 《Environmental science and pollution research international》2014,21(3):1648-1657
The present study aimed to evaluate the effect of arsenic on liver fatty acids (FA) composition, hepatotoxicity and oxidative status markers in rats. Male rats were randomly devised to six groups (n?=?10 per group) and exposed to sodium arsenate at a dose of 1 and 10 mg/l for 45 and 90 days. Arsenate exposure is associated with significant changes in the FA composition in liver. A significant increase of saturated fatty acids (SFA) in all treated groups (p?<?0.01) and trans unsaturated fatty acids (trans UFA) in rats exposed both for short term for 10 mg/l (p?<?0.05) and long term for 1 and 10 mg/l (p?<?0.001) was observed. However, the cis UFA were significantly decreased in these groups (p?<?0.05). A markedly increase of indicator in cell membrane viscosity expressed as SFA/UFA was reported in the treated groups (p?<?0.001). A significant increase in the level of malondialdehyde by 38.3 % after 90 days of exposure at 10 mg/l was observed. Compared to control rats, significant liver damage was observed at 10 mg/l of arsenate by increasing plasma marker enzymes after 90 days. It is through the histological investigations in hepatic tissues of exposed rats that these damage effects of arsenate were confirmed. The antioxidant perturbations were observed to be more important at groups treated by the high dose (p?<?0.05). An increase in the level of protein carbonyls was observed in all treated groups (p?<?0.05). The present study provides evidence for a direct effect of arsenite on FA composition disturbance causing an increase of SFA and TFAs isomers, liver dysfunction and oxidative stress. Therefore, arsenate can lead to hepatic damage and propensity towards liver cancer. 相似文献
44.
Sihem Ben Hassine Bechir Hammami Walid Ben Ameur Yassine El Megdiche Badriddine Barhoumi Rached El Abidi Mohamed Ridha Driss 《Environmental science and pollution research international》2014,21(10):6303-6313
Human serum samples (n?=?113) from Bizerte, northern Tunisia, collected between 2011 and 2012 were analyzed for 8 organochlorine pesticides (OCPs) including p,p′-dichlorodiphenyltrichloroethane (DDT) and its metabolites, hexachlorobenzene (HCB), hexachlorocyclohexane isomers, dieldrin, and heptachlor and 12 polychlorinated biphenyls (PCBs) congeners. Concentrations of these residues in serum were determined by gas chromatography with electron capture detector and total cholesterol (CHOL) and triglycerides (TG) levels were evaluated by enzymatic colorimetric method. HCB, p,p′-DDE, PCB-138, PCB-153, and PCB-180, were the most abundant organochlorine compounds (OCs) detected in >95 % of the study subjects. The mean levels of p,p′-DDE and HCB in serum were 168.8 and 49.1 ng?g?1 lipid, respectively. The sum PCBs concentrations ranged from 37.5 to 284.6 ng?g?1 lipid in the samples, with mean and median value of 136.1 and 123.2 ng?g?1 lipid, respectively. The PCB profile consisted of persistent congeners, such as PCB-138, PCB-153, and PCB-180 which contributed for approximately 82.7 % to the ∑PCBs. Statistical analysis showed that most OCs correlated significantly with age, considering all samples together or with gender differentiation. The present study shows that the levels of p,p′-DDE and ∑DDTs were significantly higher in females than in males (p?<?0.05), while PCBs levels were significantly higher in male (p?<?0.05) than in females. No statistically significant association was found between body mass index and concentration of any organochlorine pesticide or PCB congeners 153, 138, 180, or ∑PCBs. 相似文献
45.
Zarfl C Hotopp I Kehrein N Matthies M 《Environmental science and pollution research international》2012,19(8):3152-3161
According to the European legislation, REACH, organic compounds are considered as substances of very high concern (SVHC) if they are persistent, bioaccumulative and toxic (PBT). A substance's long-range transport potential (LRTP) may also pose a risk to remote regions. This is, however, not yet explicitly included. For identification of compounds, which are not PBT according to REACH criteria, but show LRTP, we investigated 22,438 compounds from the Canadian Domestic Substance List (CDSL). The CDSL was searched for organic, neutral compounds. Substance properties were estimated with EPI Suite v4.00. Next, the substance list was edited in two ways: (1) The half-life criterion in air for LRTP as defined in the Stockholm Convention was applied. (2) For all compounds, indicators for persistence and LRTP were calculated with the multimedia model ELPOS v2.2. Applying the half-life criterion, we identified 594 substances, which are prone to LRT but are not PBT (non-PBT-L substances). In contrast, investigations with ELPOS lead to a shorter list of 188 substances, which are non-PBT-L substances. Finally, the list was compared with potential Arctic contaminants identified in previous literature. Our results show that there is a large number of organic chemicals which would not be considered as SVHC since they are not, at the same time, persistent, bioaccumulative and toxic according to REACH criteria. Nevertheless, they show LRTP according to different screening approaches and thus a potential hazard to remote regions. 相似文献
46.
The paper discusses the role of visions within sustainability assessment and governance for sustainable development in Europe.
Currently, our societies (still) develop along an unsustainable path, which results in a number of persistent problems (climate
change, loss of biodiversity, poverty, etc.). Integrated sustainability assessment (ISA) is one approach designed to initiate
transitions towards sustainability. Visions of a sustainable future form an important part of ISA. These visions support the
process of discussing how the transition from today’s societies/systems to a sustainable future can be achieved. According
to the principles of ISA, visions should be developed in a participatory way, thus including the ideas and perceptions of
stakeholders, decision-makers, experts and/or citizens. The paper starts with an introduction of the concepts of visions and
scenarios and describes exemplary methods for their participatory development. Then, the main concepts for integrated sustainability
assessment in comparison with other impact assessments are discussed. The main body of the paper presents experiences in three
projects (ARTEMIS, ALARM, ECOCHANGE) in which visions and scenarios of sustainable futures were developed with stakeholders.
The paper concludes with lessons learned and suggestions for future applications for participatory scenario development. 相似文献
47.
Webster L Walsham P Russell M Hussy I Neat F Dalgarno E Packer G Scurfield JA Moffat CF 《Chemosphere》2011,83(6):839-850
Halogenated persistent organic pollutants [polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs)] along with total lipid, were measured in the liver and muscle of three species of deep water fish (black scabbard, black dogfish (liver only) and roundnose grenadier) collected from the Rockall fishing area, to the west of Scotland, between 2006 and 2008. Both contaminant groups were detected in the muscle and liver, with concentrations of PCBs being higher than PBDEs. There were no significant differences in the PCB or PBDE concentrations between the three species, or different sampling locations in the Rockall fishing area. PCB concentrations (ΣICES (International Council for the Exploration of the Sea)7 PCBs) greater than 500 μg kg−1 lipid weight were found in 26 of the 106 liver samples. PCB concentrations were compared to OSPAR assessment criteria, concentrations were above background but below Environmental Assessment Criteria. Estimated Toxic Equivalent (TEQ) concentrations, calculated using published models, in the fish muscle and liver indicated that consumption of deep water fish is unlikely to represent a risk to human health. The high squalene content in some of the black dogfish liver necessitated an additional clean-up step, involving gel permeation chromatography, when analyzing for PBDEs. Concentrations of PBDEs were low with many congeners being below detection limits, particularly in the muscle. There are currently no assessment criteria available for PBDEs. Furthermore, there is only very limited data on PBDEs in deep water fish. However, the concentrations observed in this study were similar to the concentrations recently reported in Mediterranean deep water fish. 相似文献
48.
The performance of biological and tertiary wastewater treatment procedures for rotaviruses A removal
Ibrahim Chourouk Hammami Salah Pothier Pierre Khelifi Nesserine Hassen Abdennaceur 《Environmental science and pollution research international》2020,27(6):5718-5729
Environmental Science and Pollution Research - Enteric viruses, generally found in sewage, are recognized as the main cause of waterborne and foodborne public health outbreaks. Among leading... 相似文献
49.
Ines Dombrowsky Ram Almog Nir Becker Eran Feitelson Simone Klawitter Stefan Lindemann Natalie Mutlak 《Environmental management》2010,45(5):1112-1126
The basin scale has been promoted universally as the optimal management unit that allows for the internalization of all external
effects caused by multiple water uses. However, the basin scale has been put forward largely on the basis of experience in
temperate zones. Hence whether the basin scale is the best scale for management in other settings remains questionable. To
address these questions this paper analyzes the economic viability and the political feasibility of alternative management
options in the Kidron/Wadi Nar region. The Kidron/Wadi Nar is a small basin in which wastewater from eastern Jerusalem flows
through the desert to the Dead Sea. Various options for managing these wastewater flows were analyzed ex ante on the basis
of both a cost benefit and a multi-criteria analysis. The paper finds that due to economies of scale, a pure basin approach
is not desirable from a physical and economic perspective. Furthermore, in terms of political feasibility, it seems that the
option which prompts the fewest objections from influential stakeholder groups in the two entities under the current asymmetrical
political setting is not a basin solution either, but a two plant solution based on an outsourcing arrangement. These findings
imply that the river basin management approach can not be considered the best management approach for the arid transboundary
case at hand, and hence is not unequivocally universally applicable. 相似文献
50.
Uwe Buczko Michael van Laak Bettina Eichler-Löbermann Wolfgang Gans Ines Merbach Kerstin Panten Edgar Peiter Thomas Reitz Heide Spiegel Sabine von Tucher 《Ambio》2018,47(1):50-61
Phosphorus (P) fertilizer recommendations in most European countries are based on plant-available soil P contents and long-term field experiments. Site-specific conditions are often neglected, resulting in excessive P fertilizer applications. P fertilization experiments including relevant site and soil parameters were evaluated in order to analyze the yield response. The database comprises about 2000 datasets from 30 field experiments from Germany and Austria. Statistical evaluations using a classification and regression tree approach, and multiple linear regression analysis indicate that besides plant-available soil P content, soil texture and soil organic matter content have a large influence on the effectiveness of P fertilization. This study methodology can be a basis for modification and specification of existing P fertilization recommendations and thus contribute to mitigate environmental impacts of P fertilization. 相似文献