全文获取类型
收费全文 | 729篇 |
免费 | 4篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 60篇 |
废物处理 | 33篇 |
环保管理 | 28篇 |
综合类 | 81篇 |
基础理论 | 114篇 |
污染及防治 | 278篇 |
评价与监测 | 75篇 |
社会与环境 | 64篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 9篇 |
2022年 | 12篇 |
2021年 | 21篇 |
2020年 | 10篇 |
2019年 | 26篇 |
2018年 | 29篇 |
2017年 | 33篇 |
2016年 | 42篇 |
2015年 | 20篇 |
2014年 | 42篇 |
2013年 | 97篇 |
2012年 | 56篇 |
2011年 | 49篇 |
2010年 | 19篇 |
2009年 | 23篇 |
2008年 | 39篇 |
2007年 | 42篇 |
2006年 | 25篇 |
2005年 | 16篇 |
2004年 | 27篇 |
2003年 | 19篇 |
2002年 | 15篇 |
2001年 | 7篇 |
2000年 | 10篇 |
1999年 | 3篇 |
1997年 | 3篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1984年 | 2篇 |
1982年 | 1篇 |
1979年 | 2篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1965年 | 3篇 |
1964年 | 1篇 |
1963年 | 3篇 |
1962年 | 3篇 |
1961年 | 1篇 |
1960年 | 3篇 |
1959年 | 1篇 |
1958年 | 1篇 |
1957年 | 1篇 |
1931年 | 1篇 |
排序方式: 共有736条查询结果,搜索用时 343 毫秒
281.
Ivon Cuadros-Casanova Andrea Cristiano Dino Biancolini Marta Cimatti Andrea Antonio Sessa Valeria Yeraldin Mendez Angarita Chiara Dragonetti Michela Pacifici Carlo Rondinini Moreno Di Marco 《Conservation biology》2023,37(3):e14052
The Common Agricultural Policy (CAP) is the European Union's main instrument for agricultural planning, with a new reform approved for 2023–2027. The CAP intends to align with the European Green Deal (EGD), a set of policy initiatives underpinning sustainable development and climate neutrality in the European Union (EU), but several flaws cast doubts about the compatibility of the objectives of these 2 policies. We reviewed recent literature on the potential of CAP environmental objectives for integration with the EGD: protection of biodiversity, climate change mitigation and adaptation, and sustainable management of natural resources. The CAP lacks appropriate planning measures, furthering instead risks to biodiversity and ecosystem services driven by landscape and biotic homogenization. Funding allocation mechanisms are not tailored to mitigate agricultural emissions, decreasing the efficiency of climate mitigation actions. The legislation subsidies farmers making extensive use of synthetic inputs without adequately supporting organic production, hindering the transition toward sustainable practices. We recommend proper control mechanisms be introduced in CAP Strategic Plans from each member state to ensure the EU is set on a sustainable production and consumption path. These include proportional assignment of funds to each CAP objective, quantitative targets to set goals and evidence-based interventions, and relevant indicators to facilitate effective monitoring of environmental performance. Both the CAP and the EGD should maintain ambitious environmental commitments in the face of crisis to avoid further degradation of the natural resources on which production systems stand. 相似文献
282.
Maria Chudzińska Izabela Komorowicz Anetta Hanć Ryszard Gołdyn 《Journal of environmental science and health. Part. B》2016,51(11):790-800
The content of elements in fish tissues and organs from Swarz?dzkie Lake was investigated in order to evaluate the possible risk associated with their consumption by animals as well as humans. Samples of muscle, liver and fish bone of three fish species; roach (Rutilus rutilus), silver bream (Blicca bjoerkna) and crucian carp (Carassius carassius) were collected from seine catches undertaken as part of the biomanipulation of Swarz?dzkie Lake. Element concentration (Al, As, Cd, Co, Cr, Cu, Hg, Ni, Pb, Zn) was determined by inductively coupled plasma mass spectrometry (ICP-MS), with the exception of Hg where the flow injection analysis system cold vapour atomic absorption spectrometry (FIAS-CVAAS) was applied. The study indicated a large variation in the occurrence of the investigated elements in different parts of the fish body. The highest content of Al and Zn was stated in all fish organs for each fish species. The majority of the applied statistical and chemometric methods (e.g., PCA, CA) refer to roach since we had a large number of data for this species. The obtained results were assessed in terms of their accuracy and precision using certified reference material of Fish Muscle ERM BB422. 相似文献
283.
Elvira Bocos Nihal Oturan Marta Pazos M. Ángeles Sanromán Mehmet A. Oturan 《Environmental science and pollution research international》2016,23(19):19134-19144
The removal of radiocontrast agent diatrizoic acid (DIA) from water was performed using photo-Fenton (PF) process. First, the effect of H2O2 dosage on mineralization efficiency was determined using ultraviolet (UV) irradiation. The system reached a maximum mineralization degree of 60 % total organic carbon (TOC) removal at 4 h with 20 mM initial H2O2 concentration while further concentration values led to a decrease in TOC abatement efficiency. Then, the effect of different concentrations of Fenton’s reagents was studied for homogeneous Fenton process. Obtained results revealed that 0.25 mM Fe3+ and 20 mM H2O2 were the best conditions, achieving 80 % TOC removal efficiency at 4 h treatment. Furthermore, heterogeneous PF treatment was developed using iron-activated carbon as catalyst. It was demonstrated that this catalyst is a promising option, reaching 67 % of TOC removal within 4 h treatment without formation of iron leachate in the medium. In addition, two strategies of enhancement for process efficiency are proposed: coupling of PF with electro-Fenton (EF) process in two ways: photoelectro-Fenton (PEF) or PF followed by EF (PF-EF) treatments, achieving in both cases the complete mineralization of DIA solution within only 2 h. Finally, the Microtox tests revealed the formation of more toxic compounds than the initial DIA during PF process, while, it was possible to reach total mineralization by both proposed alternatives (PEF or PF-EF) and thus to remove the toxicity of DIA solution. 相似文献
284.
285.
Strumińska-Parulska Dagmara I. Szymańska Karolina Krasińska Grażyna Skwarzec Bogdan Falandysz Jerzy 《Environmental science and pollution research international》2016,23(22):22606-22613
Environmental Science and Pollution Research - The paper presents the studies on 210Po and 210Pb activity determination in red-capped scaber (Leccinum aurantiacum (Bulliard) Gray) collected in... 相似文献
286.
Marta Batoryna Marcin Lis Grzegorz Formicki 《Journal of environmental science and health. Part. B》2017,52(8):600-606
This study was undertaken to determine the redox balance in the developing brain after exposure to acrylamide (ACR), a potent neurotoxin. The studies were performed using an in ovo chick embryo model. The antioxidant enzymes SOD, GPx, CAT, and reduced glutathione (GSH) were used as indicators of the redox balance. Eggs were injected with ACR doses of 40 mg kg?1 egg mass (2.4 mg egg?1) on embryonic day 17 (E17). The activity of the antioxidant enzymes and the concentration of GSH were measured at E17, E18, and E19 in the medulla oblongata, cerebrum, cerebellum, and optic lobe. The results indicated a significant decrease in the GSH concentrations in the optic lobe (E19, E20) and cerebrum (E20) of embryos exposed to ACR. The activities of SOD and GPx were significantly increased in the majority of the examined structures after injection of ACR. CAT activity was completely inhibited in the brains of the embryos exposed to ACR compared to that in the brains of the control embryos. Thus, we concluded that ACR exerts a significant influence on the redox balance in the developing brain by impacting the activity of antioxidant enzymes and the levels of GSH. 相似文献
287.
Baran Agnieszka Tarnawski Marek Urbański Krzysztof Klimkowicz-Pawlas Agnieszka Spałek Iwona 《Environmental science and pollution research international》2017,24(29):23180-23195
Environmental Science and Pollution Research - The aims of the study were to investigate the concentration, sources and ecological risk of PAHs (polycyclic aromatic hydrocarbons) in bottom... 相似文献
288.
Marta Ricart Dami Barcel Anita Geiszinger Helena Guasch Miren Lpez de Alda Anna M. Romaní Gemma Vidal Marta Villagrasa Sergi Sabater 《Chemosphere》2009,76(10):1392-1401
A system of recirculating channels was used in this study to examine the long-term effects (29 d) of environmentally realistic concentrations of the herbicide diuron (from 0.07 to 7 μg L−1) on biofilm communities. The autotrophic activity of biofilms was affected by this herbicide, as reflected by a marked decrease in the photosynthetic efficiency. Diuron exposure also increased chlorophyll-a content and reduced the biovolume of diatom taxa at low concentrations. The effects on bacteria were also remarkable. Bacterial abundance was reduced after a week of exposure to the herbicide at a range of concentrations. Effects were on the number of live bacteria and on the increase in the leucine-aminopeptidase activity. It is suggested that inputs of herbicides to the river ecosystem at low concentrations may cause a chain of effects in the biofilm, which include inhibitory effects on algae but also indirect effects on the relationships between biofilm components. 相似文献
289.
Joanna Szlinder-Richert Iwona Barska Zygmunt Usydus Wiesawa Ruczyska Roman Grabic 《Chemosphere》2009,74(11):1509-1515
Concentrations of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (dl-PCBs) in the southern Baltic herring (Clupea harengus), sprat (Sprattus sprattus), and salmon (Salmo salar) are reported.The significant interspecies and season-specific differences in PCDD/Fs and dl-PCBs concentrations were observed. The contribution of dl-PCBs to the total toxicity equivalents (TEQs) ranged between 50% and 70%, dependently on fish species. In all samples, concentrations of PCDF were higher in comparison with that of PCDD.The permissible limits of the content of PCDD/Fs and dl-PCBs (8 pg g−1 fresh weight for the sum of PCDD/Fs and dl-PCBs, and 4 pg g−1 fresh weight for the PCDD/Fs) were exceeded mainly in salmon samples (in 80% of salmon samples studied). The elevated levels of PCDD/F and dl-PCB were observed only in two of seventy two herring samples, and in ten of 62 sprat samples.The multiple regression analysis revealed that fish lipid content, and concentration of PCB 153, used simultaneously, might be useful in the prediction of TEQ values of fish samples. These two variables explained more than 80% of total variance. For all fish species studied, the correlation coefficients obtained with the multiple regression analysis were higher than that obtained with the regression analysis involving total TEQ values, and only one independent variable: fish lipid content. 相似文献
290.
Marta Schuhmacher Hannu Kiviranta Päivi Ruokojärvi Martí Nadal José L. Domingo 《Environment international》2009,35(3):607-613
The concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs) were determined in breast milk from women living in the vicinity of a new hazardous waste incinerator (HWI) in Catalonia, Spain. The results were compared with the levels obtained in two previous surveys carried out in 1998 (baseline study) and 2002. The current concentrations of PCDD/Fs in breast milk ranged from 45 to 143 pg/g fat (2.8 to 11.2 pg WHO-TEQ/g fat), while total PCBs ranged from 114 to 617 pg/g fat (2.8 to 17.6 pg WHO-TEQ/g fat). PBDE concentrations (sum 15 congeners) ranged from 0.57 ng/g fat to 5.9 ng/g fat, with a mean value of 2.5 ng/g fat. A general decrease of the concentrations for PCDD/Fs and both planar and total PCBs was observed. Regarding to PBDE concentrations in breast milk, similar levels between the 2002 and the present study were noted. The levels of PCDD/Fs and PCBs in milk of women living in urban areas were higher than those corresponding to the industrial zones (38% and 40%, respectively). However, the current PBDE levels were slightly lower (13%) in the urban than in the industrial zone. For PCDD/Fs and PCBs, the current decreases are in accordance with the reduction in the dietary intake of these pollutants found in recent studies carried out in the same area of study. 相似文献