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61.
Mercedes Silva 《生态毒理学报》2002,(4):16-20
注意保护自然与文化资源 , 生态旅游就能够产生收益 , 在保护地和偏远农村地区更是如此 .本 文集中论述了为使旅游产业更具有可持续性 , 在加勒比地区 ( 例如伯利兹、博奈尔岛、圣卢 西亚、开曼群岛、古巴和委内瑞拉 ) 所采取的一些积极措施 . 相似文献
62.
Mirady Sebastiani Sara Elena González María Mercedes Castillo Pablo Alvizu María Albertina Oliveira Jorge Pérez Antonio Quilici Martín Rada María Carolina Yáber Miguel Lentino 《Environmental management》1994,18(5):647-661
In Venezuela, large-scale shrimp farming began in the 1980s. By 1987, the Ministry of Environment and Natural Resources (MARNR)
had received 14 proposals for approval. A developer illegally started the construction of ponds at the Píritu Lagoon in the
State of Anzoátegui before the authorization process was completed. This action triggered a land-use conflict. This study
identifies the causes for public protest and determines the consequences of this conflict for land-use management. The results
show that public protest was based on the impacts of the partial construction of ponds. These impacts were related to direct
removal of wetlands, interruption of natural patterns of surface flows, and alteration of feeding grounds of some bird species
with migratory status. Consequences were identified in relation to the role that nongovernmental organizations (NGOs) play
in land-use conflicts and the actions that MARNR could take in the future to prevent and solve similar situations. 相似文献
63.
Jovita Mercedes Hojas Baenas Rosani de Castro Rosane Aparecida Gomes Battistelle José Alcides Gobbo Junior 《Journal of Cleaner Production》2011,19(2-3):168-172
Having the objective of minimizing costs and improving their image in the consumer and export market, car battery industries began to seek environmental alternatives geared towards sustainable development. Reverse logistics flow represents an unprecedented tool for the economic and operational development of company activities, as well as a differential in the search for competitive advantages through environmentally correct practices. The aim of this paper is to describe the reverse logistics chain adopted by automotive battery industries in the midwest of the state of São Paulo, proposing a reverse logistics framework for small manufacturers that creates actions aimed at not harming the environment. 相似文献
64.
Mercedes G. Bermudez Wirawit Piyamongkol Susana Tomaz Evelyn Dudman Jon K. Sherlock Dagan Wells 《黑龙江环境通报》2003,23(8):669-677
There is increasing interest in the use of preimplantation genetic diagnosis (PGD) as an alternative to routine prenatal diagnosis. However, the costs associated with development and testing of new PGD protocols have forced some PGD centres to limit the number of diseases for which PGD is offered. One of the main factors in the design of new protocols, which affects cost and accuracy, is the choice of the mutation-detection technique. We have assessed the reliability of DNA sequencing and mini-sequencing for clinical diagnosis at the single-cell level and have found them to be rapid and accurate. Extensive optimisation for individual mutations is not usually necessary when employing these versatile techniques and consequently a smaller investment of time and resources should be required during development of new protocols. Additionally, we report single-cell protocols for the diagnoses of cystic fibrosis, sickle cell anaemia and β-thalassaemia, which utilise mini-sequencing. Unlike most mutation-detection techniques, mini-sequencing permits analysis of very small DNA fragments. Small amplicons experience low allele dropout (ADO) rates, and consequently this approach could potentially improve the reliability of PGD. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
65.
Preconceptions of students about the natural urban environment in a small Spanish city 总被引:1,自引:0,他引:1
Summary The preconceptions of secondary students from a small Spanish city, mainly about natural aspects, have been studied. The main characteristic of their conceptions about the urban natural environment was that it was always linked to negative aspects and was generally seen as something essentially problematic. Moreover, it seems that their knowledge of smaller living beings, of wild animals, plants and fungi, was worse than for other urban living beings. The analysis of these alternative conceptions has led the authors to propose some recommendations for curricular design and development for schools in urban environments.Dr Mercedes Suárez is an educationalist and Professor of Curriculum in the Faculty of Humanities in the University. Emilia Nogueiras has a degree in Biology and Education and is a science teacher in the High School in Orense. 相似文献
66.
M. Olivares-Marín T.C. Drage M. Mercedes Maroto-Valer 《International Journal of Greenhouse Gas Control》2010,4(4):623-629
In this work several Li4SiO4-based sorbents from fly ashes for CO2 capture at high temperatures have been developed. Three fly ash samples were collected and subjected to calcination at 950 °C in the presence of Li2CO3. Both pure Li4SiO4 and fly ash-based sorbents were characterised and tested for CO2 sorption at different temperatures between 400 and 650 °C and adding different amounts of K2CO3 (0–40 mol%). To examine the sorbents performance, multiple CO2 sorption/desorption cycles were carried out. The temperature and the presence of K2CO3 strongly affect the CO2 sorption capacity for the sorbents prepared from fly ashes. When the sorption temperature increases by up to 600 °C both the CO2 sorption capacity and the sorption rate increase significantly. Moreover when the amount of K2CO3 increases, the CO2 sorption capacity also increases. At optimal experimental conditions (600 °C and 40 mol% K2CO3), the maximum CO2 sorption capacity for the sorbent derived from fly ash was 107 mg CO2/g sorbent. The Li4SiO4-based sorbents can maintain its original capacity during 10 cycle processes and reach the plateau of maximum capture capacity in less than 15 min, while pure Li4SiO4 presents a continual upward tendency for the 15 min of the capture step and attains no equilibrium capacity. 相似文献
67.
Camacho Jos A. da Silva Almeida Lucas Rodrguez Mercedes Molina Jess 《Environment, Development and Sustainability》2022,24(4):4602-4622
Environment, Development and Sustainability - In order to adequately assess energy policies and set clear objectives, a key preliminary step is to know the energy use patterns of the different... 相似文献
68.
Jesús Miguel Avilés Eva María Bootello Mercedes Molina-Morales Juan Gabriel Martínez 《Behavioral ecology and sociobiology》2014,68(8):1287-1298
Studies of antiparasite defences against cuckoo parasites have largely neglected the possibility that behavioural components of host defence may correlate giving rise to a behavioural syndrome. Furthermore, the different contribution of the host’s sex in nest defence has traditionally been disregarded. Here, we studied magpie (Pica pica) mobbing behaviour towards dummies of great spotted cuckoo (Clamator glandarius) and non-harmful hoopoes (Upupa epops) and egg rejection of parasite eggs in a population of colour-banded magpies. We predicted a positive correlation between the intensity of nest defence and egg rejection within each sex and that females respond more intensely than males to the threat of brood parasitism as they undertake incubation. Magpie males, but not females, defended their nests more intensely in those nests in which cuckoo model eggs were rejected. Individual magpies did significantly differ in their baseline level of nest attentiveness; however, there were no individual differences once pair identity was considered. Males and females defended their nests more intensely when it was exposed to the presence of a great spotted cuckoo dummy. Males, but not females, were more prone to appear at their nests, and females, but not males, were more prone to defend more intensely when their nests were challenged by a parasite threat. Our results thus agree with the view that mobbing behaviour and egg rejection in magpies may actually constitute a pseudosyndrome and highlight the necessity to integrate interindividual variation and the sex of the host in studies of the evolution of host defences. 相似文献
69.
Stella Maris Ríos Mercedes Barquín Norma Nudelman 《Environmental Chemistry Letters》2010,8(3):223-229
Hydrocarbons in Patagonian sediments were analyzed to evaluate their biogenic or petrogenic origins. Structural determination
by 1H-NMR spectrometry and principal component analysis (PCA) show that the first two principal components accounted for more
than 75.7% of the variance. The results indicate that biogenic hydrocarbons have mainly linear hydrocarbon chains and polar
groups (high H2, H4, H5, and HCOOH), while petrogenic hydrocarbons show more branched chains and mainly mono-aromatic components, e.g., crude oil (high H1, H1A, and H3) or mainly poly-aromatic components (high H4, and H2A) in weathering oil. 相似文献
70.
Zacarías Silvia Mercedes Manassero Agustina Pirola Silvana Alfano Orlando Mario Satuf María Lucila 《Environmental science and pollution research international》2021,28(19):23859-23867
Environmental Science and Pollution Research - Since COVID-19 pandemic, indoor air quality control has become a priority, and the development of air purification devices effective for disinfecting... 相似文献