全文获取类型
收费全文 | 237篇 |
免费 | 0篇 |
国内免费 | 6篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 9篇 |
环保管理 | 25篇 |
综合类 | 78篇 |
基础理论 | 41篇 |
环境理论 | 2篇 |
污染及防治 | 61篇 |
评价与监测 | 7篇 |
社会与环境 | 4篇 |
灾害及防治 | 1篇 |
出版年
2021年 | 5篇 |
2020年 | 5篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 12篇 |
2012年 | 10篇 |
2011年 | 6篇 |
2010年 | 5篇 |
2009年 | 15篇 |
2008年 | 11篇 |
2007年 | 15篇 |
2006年 | 9篇 |
2005年 | 3篇 |
2004年 | 26篇 |
2003年 | 7篇 |
2002年 | 5篇 |
2001年 | 5篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1987年 | 2篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1979年 | 3篇 |
1970年 | 2篇 |
1967年 | 3篇 |
1966年 | 4篇 |
1965年 | 4篇 |
1962年 | 2篇 |
1960年 | 2篇 |
1959年 | 3篇 |
1958年 | 2篇 |
1957年 | 7篇 |
1956年 | 2篇 |
1955年 | 1篇 |
1954年 | 3篇 |
1952年 | 2篇 |
1946年 | 1篇 |
1944年 | 1篇 |
1931年 | 1篇 |
1928年 | 1篇 |
1926年 | 1篇 |
排序方式: 共有243条查询结果,搜索用时 46 毫秒
141.
Rolf Turner 《Environmental and Ecological Statistics》2009,16(2):197-223
In this paper I demonstrate some of the techniques for the analysis of spatial point patterns that have become available due
to recent developments in point process modelling software. These developments permit convenient exploratory data analysis,
model fitting, and model assessment. Efficient model fitting, in particular, makes possible the testing of statistical hypotheses
of genuine interest, even when interaction between points is present, via Monte Carlo methods. The discussion of these techniques
is conducted jointly with and in the context of some preliminary analyses of a collection of data sets which are of considerable
interest in their own right. These data sets (which were kindly provided to me by the New Brunswick Department of Natural
Resources) consist of the complete records of wildfires which occurred in New Brunswick during the years 1987 through 2003.
In treating these data sets I deal with data-cleaning problems, methods of exploratory data analysis, means of detecting interaction,
fitting of statistical models, and residual analysis and diagnostics. In addition to demonstrating modelling techniques, I
include a discussion on the nature of statistical models for point patterns. This is given with a view to providing an understanding
of why, in particular, the Strauss model fails as a model for interpoint attraction and how it has been modified to overcome
this difficulty. All actual modelling of the New Brunswick fire data is done only with the intent of illustrating techniques.
No substantive conclusions are or can be drawn at this stage. Realistic modelling of these data sets would require incorporation
of covariate information which I do not so far have available.
相似文献
Rolf TurnerEmail: |
142.
Jianyun Ruan Xun Wu Rolf Hrdter 《生态毒理学报》2001,(2):89-90
人们正加大努力以求最大限度地降低杀虫剂的使用,这些杀虫剂是控制茶树和其它作物的病虫害的基本手段.在中国,由于土壤常常缺少碳酸钾,所以适量使用这种养料有助于减少对杀虫剂的需要.已经证实,在土壤中加入钾后,茶树感染真菌病的比率下降. 相似文献
143.
Jaco Vangronsveld Rolf Herzig Nele Weyens Jana Boulet Kristin Adriaensen Ann Ruttens Theo Thewys Andon Vassilev Erik Meers Erika Nehnevajova Daniel van der Lelie Michel Mench 《Environmental science and pollution research international》2009,16(7):765-794
Background, aim, and scope
The use of plants and associated microorganisms to remove, contain, inactivate, or degrade harmful environmental contaminants (generally termed phytoremediation) and to revitalize contaminated sites is gaining more and more attention. In this review, prerequisites for a successful remediation will be discussed. The performance of phytoremediation as an environmental remediation technology indeed depends on several factors including the extent of soil contamination, the availability and accessibility of contaminants for rhizosphere microorganisms and uptake into roots (bioavailability), and the ability of the plant and its associated microorganisms to intercept, absorb, accumulate, and/or degrade the contaminants. The main aim is to provide an overview of existing field experience in Europe concerning the use of plants and their associated microorganisms whether or not combined with amendments for the revitalization or remediation of contaminated soils and undeep groundwater. Contaminations with trace elements (except radionuclides) and organics will be considered. Because remediation with transgenic organisms is largely untested in the field, this topic is not covered in this review. Brief attention will be paid to the economical aspects, use, and processing of the biomass.Conclusions and perspectives
It is clear that in spite of a growing public and commercial interest and the success of several pilot studies and field scale applications more fundamental research still is needed to better exploit the metabolic diversity of the plants themselves, but also to better understand the complex interactions between contaminants, soil, plant roots, and microorganisms (bacteria and mycorrhiza) in the rhizosphere. Further, more data are still needed to quantify the underlying economics, as a support for public acceptance and last but not least to convince policy makers and stakeholders (who are not very familiar with such techniques). 相似文献144.
Painted surfaces--important sources of polychlorinated biphenyls (PCBs) contamination to the urban and marine environment 总被引:1,自引:0,他引:1
Jartun M Ottesen RT Steinnes E Volden T 《Environmental pollution (Barking, Essex : 1987)》2009,157(1):295-302
A study of a large number of samples of flaking old paint from various buildings in Bergen, Norway (N = 68) suggests that paint may be the most important contemporary source of PCBs in this urban environment with concentrations of PCB7 up to 3.39 g/kg. Twenty-three of the samples were collected from a single building, and the concentrations were found to vary over 3 orders of magnitude. In addition, 16 concrete samples from a large bridge previously coated with PCB-containing paint were collected and separated into outer- and inner samples indicating that PCBs are still present in high concentrations subsequent to renovation. PCBs were found in several categories of paint from wooden and concrete buildings, potentially introduced to the environment by natural weathering, renovation, and volatilization. Consequently, this dispersion may lead to increased levels of PCBs in urban atmospheres, soils, and harbor sediments where high concentrations have resulted in Governmental advice against consumption of certain seafood. 相似文献
145.
Silvennoinen H Hietanen S Liikanen A Stange CF Russow R Kuparinen J Martikainen PJ 《Ambio》2007,36(2-3):134-140
Estuaries have been suggested to have an important role in reducing the nitrogen load transported to the sea. We measured denitrification rates in six estuaries of the northern Baltic Sea. Four of them were river mouths in the Bothnian Bay (northern Gulf of Bothnia), and two were estuary bays, one in the Archipelago Sea (southern Gulf of Bothnia) and the other in the Gulf of Finland. Denitrification rates in the four river mouths varied between 330 and 905 micromol N m(-2) d(-1). The estuary bays at the Archipelago Sea and the Gulf of Bothnia had denitrification rates from 90 micromol N m(-2) d(-1) to 910 micromol N m(-2) d(-1) and from 230 micromol N m(-2) d(-1) to 320 micromol N m(-2) d(-1), respectively. Denitrification removed 3.6-9.0% of the total nitrogen loading in the river mouths and in the estuary bay in the Gulf of Finland, where the residence times were short. In the estuary bay with a long residence time, in the Archipelago Sea, up to 4.5% of nitrate loading and 19% of nitrogen loading were removed before entering the sea. According to our results, the sediments of the fast-flowing rivers and the estuary areas with short residence times have a limited capacity to reduce the nitrogen load to the Baltic Sea. 相似文献
146.
Jensen H Reimann C Finne TE Ottesen RT Arnoldussen A 《Environmental pollution (Barking, Essex : 1987)》2007,145(3):829-838
The top 2 cm of forest soils were collected along a 120 km long south-north transect running through Norway's largest city Oslo. Forty samples were analysed for their polycyclic aromatic hydrocarbon (PAH(16) as defined by the U.S. Environmental Protection Agency) concentrations and compositions. Local variations in the PAH values are high and the reported concentrations are in general low (maximum sumPAH16: 2.6 mg/kg). The transect shows distinct differences of sumPAH16 values from south to north. PAH concentrations are substantially lower in the less populated areas at the north end of the transect than at the urbanised and much more populated south end. Several high values occur in a forested area to the north of Oslo, used for recreation purposes. The PAH distribution patterns point towards a predominantly pyrogenic origin. Local Cambrian carbon-rich black shales can be excluded as sources for PAHs in the forest soils. 相似文献
147.
Lead and polycyclic aromatic hydrocarbons (PAHs) in surface soil from day care centres in the city of Bergen, Norway 总被引:2,自引:0,他引:2
Surface soil (0-2cm) quality in 87 day care centres in the city of Bergen, Norway has been studied. Approximately 45% of the day care centres contained Pb and PAH values above recommended action levels. There are clear variations between different areas of the city. The old central part of the city hosts most of the contaminated day care centres. In suburban areas most of the day care centres have Pb and PAH concentrations below action levels. City fires, gas work emission, lead-based paint, and traffic are probably important anthropogenic contamination sources, together with uncontrolled transportation of soil from contaminated to clean areas. Geological or other natural sources are probably not an important contributor to the high levels of lead and PAH. 相似文献
148.
L. Horst Grimme Rolf Altenburger Thomas Backhaus Michael Faust Wolfgang Bödeker Martin Scholze 《Environmental Sciences Europe》2000,12(4):226-234
Ecosystems and biocoenoses are exposed to multiple mixtures of environmental pollutants, but the usual risk assessment of chemical toxicities is focussed only on the judgement of single substance toxicity. With the two biometrical models concentration-addition and independent action known from pharmacology and toxicology, a pragmatic way for the analysis of combined effects is possible using the experimental knowledge of single substance toxicity. A short introduction to the models is given and an appropriate experimental design for mixture toxicity analysis is outlined. The principal suitability of the concepts was verifed in two different bioassays (green alga; luminescent bacterium) with the analysis of binary and multiple mixture toxicities of environmental chemicals. In this paper we present the results obtained with the green algae bioassay. Congruent results from the bioluminescence inhibition assay can be found in Grimme (1998). The results obtained indicate that the toxicities of mixtures of chemicals can be studied experimentally, even at low concentrations of the individual components. Mixture toxicities were detected at low, statistically non-significantly acting concentrations of the single compounds. These results force one to take mixture toxicities into account when environmental standards are established. 相似文献
149.
Henne Paul D. Bigalke Moritz Büntgen Ulf Colombaroli Daniele Conedera Marco Feller Urs Frank David Fuhrer Jürg Grosjean Martin Heiri Oliver Luterbacher Jürg Mestrot Adrien Rigling Andreas Rössler Ole Rohr Christian Rutishauser This Schwikowski Margit Stampfli Andreas Szidat Sönke Theurillat Jean-Paul Weingartner Rolf Wilcke Wolfgang Tinner Willy 《Regional Environmental Change》2018,18(1):205-221
Regional Environmental Change - Planning for the future requires a detailed understanding of how climate change affects a wide range of systems at spatial scales that are relevant to humans.... 相似文献
150.
John Munthe Eva Brorström-Lundén Magnus Rahmberg Leo Posthuma Rolf Altenburger Werner Brack Dirk Bunke Guy Engelen Bernd Manfred Gawlik Jos van Gils David López Herráez Tomas Rydberg Jaroslav Slobodnik Annemarie van Wezel 《Environmental Sciences Europe》2017,29(1):13