全文获取类型
收费全文 | 170篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 6篇 |
废物处理 | 18篇 |
环保管理 | 18篇 |
综合类 | 29篇 |
基础理论 | 22篇 |
污染及防治 | 53篇 |
评价与监测 | 16篇 |
社会与环境 | 13篇 |
出版年
2023年 | 7篇 |
2022年 | 12篇 |
2021年 | 10篇 |
2020年 | 4篇 |
2019年 | 10篇 |
2018年 | 13篇 |
2017年 | 8篇 |
2016年 | 14篇 |
2015年 | 6篇 |
2014年 | 5篇 |
2013年 | 8篇 |
2012年 | 16篇 |
2011年 | 16篇 |
2010年 | 3篇 |
2009年 | 7篇 |
2008年 | 5篇 |
2007年 | 5篇 |
2006年 | 6篇 |
2005年 | 8篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1995年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有175条查询结果,搜索用时 15 毫秒
121.
C.?N.?WhittakerEmail authorView authors OrcID profile R.?I.?Nokes H.-Y.?Lo P.?L.-F.?Liu M.?J.?Davidson 《Environmental Fluid Mechanics》2017,17(5):929-958
This paper presents a study of the waves generated by a solid block landslide moving along a horizontal boundary. The landslide was controlled using a mechanical system in a series of physical experiments, and laser-induced fluorescence measurements resolved both spatial and temporal variations in the free surface elevation. During its constant-velocity motion, the landslide transferred energy into ‘trapped’ offshore-propagating waves within a narrow frequency band. The wave trapping is demonstrated by investigating the wave dispersion characteristics using a two-dimensional Fourier Transform. The first of the trailing waves broke at Froude numbers greater than or equal to 0.625. The parametric dependence of the largest-amplitude waves and the potential energy within the wave field are discussed. The experimental results were compared to the predictions of an incompressible Navier–Stokes solver with and without turbulence models. The numerical model under-predicted the measured wave amplitudes, although it accurately predicted the measured wave phasing. The turbulent model more accurately predicted the shapes of the trailing waves. Both experimental and numerical results confirmed that investigations into wave generation by submerged objects moving at constant velocity should also consider the initial acceleration of the object, as this affects the overall evolution of the wave field. The applicability of the horizontal-boundary results to more realistic field scenarios is discussed. 相似文献
122.
Ulysses Paulino de Albuquerque Luciana Gomes de Sousa Nascimento Fabio José Vieira Cybelle Maria de Albuquerque Duarte Almeida Marcelo Alves Ramos Ana Carolina Oliveira da Silva 《Journal of Agricultural and Environmental Ethics》2012,25(1):19-32
The scientific community has debated the importance of “return” activities after ethnobiological studies. This issue has provoked
debate because it touches on the ethics of research and the relationships with the people involved in these studies. This
case study aimed to investigate community perception of an ethnobotany research project that was carried out in the semi-arid
region of northeastern Brazil. Furthermore, we reported how the residents of this rural community felt about participating
in the activities of “return” that arose from the projects. Our findings demonstrate that “return” activities should be planned
from the design phase of the research until its closure as a lifelong process that allows the communities involved to gradually
take ownership of the information and actions that are being generated. Similarly, we argue that such activities must be negotiated
with the people of the community so that they have decision-making power and autonomy to decide what is most relevant to their
lives. 相似文献
123.
Vieira CD de Carvalho MA Cussiol NA Alvarez-Leite ME dos Santos SG Gomes RM Silva MX Nicoli JR Farias Lde M 《Waste management (New York, N.Y.)》2011,31(6):1327-1332
In Brazil, few studies on microbial content of dental solid waste and its antibiotic susceptibility are available. An effort has been made through this study to evaluate the hazardous status of dental solid waste, keeping in mind its possible role in cross-infection chain. Six samples of solid waste were collected at different times and seasons from three dental health services. The microbial content was evaluated in different culture media and atmospheric conditions, and the isolates were submitted to antibiotic susceptibility testing. A total of 766 bacterial strains were isolated and identified during the study period. Gram-positive cocci were the most frequent morphotype isolated (48.0%), followed by Gram-negative rods (46.2%), Gram-positive rods (5.0%), Gram-negative-cocci (0.4%), and Gram-positive coccobacillus (0.1%). Only two anaerobic bacteria were isolated (0.3%). The most frequently isolated species was Staphylococcus epidermidis (29.9%), followed by Stenotrophomonas maltophilia (8.2%), and Enterococcus faecalis (6.7%). High resistance rate to ampicillin was observed among Gram-negative rods (59.4%) and Gram-positive cocci (44.4%). For Gram-negative rods, high resistance was also noted to aztreonam (47.7%), cefotaxime (47.4%), ceftriaxone and cefazolin (43.7%), and ticarcillin-clavulanic acid (38.2%). Against Gram-positive cocci penicillin exhibit a higher resistance rate (45.0%), followed by ampicillin, erythromycin (27.2%), and tetracycline (22.0%). The present study demonstrated that several pathogenic bacteria are present in dental solid waste and can survive after 48 h from the waste generation time and harbor resistance profiles against several clinical recommended antibiotics. 相似文献
124.
Ferreira MI Domingos M Gomes Hde A Saldiva PH de Assunção JV 《Environmental pollution (Barking, Essex : 1987)》2007,146(1):219-224
We report seasonal variation in CH(4) and N(2)O emission rate from solid storage of bovine manure in Delhi as well as emission factors and emission inventory from manure management systems in India. Emission flux observed in the year 2002-2003 was 4.29+/-1, 4.84+/-2.44 and 12.92+/-4.25 mg CH(4)kg(-1)dung day(-1), as well as 31.29+/-4.93, 72.11+/-16.22 and 6.39+/-1.76 microgN(2)O kg(-1)dung day(-1) in winter, summer and rainy seasons, respectively. CH(4) emission factors varied from 0.8 to 3.3 kg hd(-1)year(-1) for bovines and were lower than IPCC-1996 default values. N(2)O emission factors varied from 3 to 11.7 mg hd(-1)year(-1) from solid storage of manure. Inventory estimates were found to about 698+/-27 Gg CH(4) from all manure management systems and 2.3+/-0.46 tons of N(2)O from solid storage of manure for the year 2000. 相似文献
125.
Mayan ON Gomes MJ Henriques A Silva S Begonha A 《Environmental monitoring and assessment》2006,123(1-3):31-40
Campo de Jales is a village surrounding the abandoned Jales mine. The area is heavily contaminated with heavy metals and dusts from large tailings piles as result of centuries of mining operations. The aim of this study is to investigate potential health threats associated with site contamination. The population studied comprised two groups: people living in Campo de Jales (n = 229) and a control group – people living in Vilar de Macada (n = 234). Lead and cadmium exposure and symptoms survey were carried out.The results showed a significant higher levels of blood lead and cadmium between the Campo de Jales residents (lead: 9.5 microgr/dl versus 7.7 microgr/dl; cadmium: 0.84 microgr/dl versus 0,65 microgr/dl) as well as to a higher prevalence of respiratory and irritation symptoms and great concern about his own health.In conclusion: community is the scene of long-term health problems resulting from the site environmental contamination. 相似文献
126.
Gomes Fernanda Bento Rosa Cândido Vinícius Bignoto da Rocha Vargas Isabela Salgado de Paiva Luiz Evaristo Dias Silva Jonathas Batista Gonçalves Branco Otavio Eurico de Aquino Castro Samuel Rodrigues 《Journal of Material Cycles and Waste Management》2023,25(1):144-156
Journal of Material Cycles and Waste Management - Leakage modeling can be crucial for environmental management and control of waste landfills. However, defining boundary conditions for these models... 相似文献
127.
Drawing on the cognitive persistence perspective of creativity and conservation of resources theory, we investigated how 2 social contexts (perceived relationship conflict and coworker support for creativity) influence the relationship between anger and creative process engagement (CPE) in organizations. We tested our hypotheses using 422 daily surveys from 98 participants, collected over 5 consecutive workdays. The results show that anger perceived relationship conflict and coworker support for creativity interact to influence CPE. Specifically, when relationship conflict is high, the anger–CPE relationship is positive for employees who receive high coworker support for creativity, but negative for those who receive low coworker support for creativity. In contrast, when relationship conflict is low, the anger–CPE relationship is positive but does not differ at high versus low coworker support for creativity. 相似文献
128.
Graziele Aparecida Fernandes da Cruz Débora de Jesus Pires Luiz Artur Mendes Bataus Rassan Dyego Romão Silva Mônica Santiago Barbosa Raylane Pereira Gomes Carla Afonso Silva Bitencourt Braga Lilian Carla Carneiro 《Environmental monitoring and assessment》2018,190(10):616
The objective of this study was to identify Z. indianus in PEJC and PESCAN. Listed are the following methods: to isolate bacteria from the integument of the Z. indianus species collected and to check the resistance of microorganisms to antibiotics. Collections of Z. indianus were performed in four seasons of the two parks. The results obtained suggest that the low amount of Z. indianus collected can be justified by environmental factors such as high average temperature and low average humidity. It is noted that there is a predominance of bacteria of the Enterobacteriaceae family found in both the PEJC and the PESCAN. The antibiogram performed for the isolated PEJC bacteria shows statistical significance when comparing the edge and inside values of the park. Studies with fungi were also carried out, and it was evidenced that Trichophyton spp. was the genus that most inhabited the two environments studied. The ability of fluconazole and ketoconazole to inhibit fungal growth was also investigated, and considering the concentration tested may suggest that they have good action spectra. Plasmid profile data show that 60% of antibiotic-resistant bacteria have plasmids. The values found show that Z. indianus can act as vectors of microorganisms that affect the healthy animals and humans and that these organisms may be influenced by seasons. 相似文献
129.
Cíntia Melazo Dias Everaldo C. Telles Roberto Ventura Santos Kristina Stenström Iêda Gomes Nícoli Rosangela da Silveira Corrêa Göran Skog 《Journal of environmental radioactivity》2009
Nuclear power plants release 14C during routine operation mainly as airborne gaseous effluents. Because of the long half-life (5730 years) and biological importance of this radionuclide (it is incorporated in plant tissue by photosynthesis), several countries have monitoring programs in order to quantify and control these emissions. This paper compares the activity of 14C in soils taken within 1 km from a Brazilian nuclear power plant with soils taken within a reference area located 50 km away from the reactor site. Analyses of total carbon, δ13C and 137Cs were also performed in order to understand the local soil dynamics. Except for one of the profiles, the isotopic composition of soil organic carbon reflected the actual forest vegetation present in both areas. The 137Cs data show that the soils from the base of hills are probably allocthonous. 相似文献
130.
Application and sensitivity testing of a eutrophication assessment method on coastal systems in the United States and European Union 总被引:5,自引:0,他引:5
The Assessment of Estuarine Trophic Status (ASSETS) screening model has been extended to allow its application to both estuarine and coastal systems. The model, which combines elements of pressure, state and response, was tested on four systems: Maryland Coastal Bays and Long Island Sound in the United States and The Firth of Clyde (Scotland) and Tagus Estuary (Portugal) in the European Union. The overall scores were: Maryland Coastal Bays: Bad; Firth of Clyde: Poor; Tagus Estuary: Good. Long Island Sound was modelled along a timeline, using 1991 data (score: Bad) and 2002 data (score: Moderate). The improvement registered for Long Island Sound is a consequence of the reduction in nutrient loading, and the ASSETS score changed accordingly. The two main areas where developments are needed are (a) In the definition of type-specific ranges for eutrophication parameters, due to the recognition that natural or pristine conditions may vary widely, and the use of a uniform set of thresholds artificially penalizes some systems and potentially leads to misclassification; (b) In the definition and quantification of measures which will result in an improved state through a change in pressures, as well as in the definition of appropriate metrics through which response may be assessed. One possibility is the use of detailed research models where different response scenarios potentially produce changes in pressure and state. These outputs may be used to drive screening models and analyze the suitability of candidate metrics for evaluating management options. 相似文献