全文获取类型
收费全文 | 277篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 12篇 |
环保管理 | 58篇 |
综合类 | 31篇 |
基础理论 | 59篇 |
污染及防治 | 57篇 |
评价与监测 | 15篇 |
社会与环境 | 26篇 |
灾害及防治 | 10篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 14篇 |
2015年 | 4篇 |
2014年 | 8篇 |
2013年 | 24篇 |
2012年 | 16篇 |
2011年 | 8篇 |
2010年 | 13篇 |
2009年 | 18篇 |
2008年 | 20篇 |
2007年 | 11篇 |
2006年 | 9篇 |
2005年 | 12篇 |
2004年 | 11篇 |
2003年 | 9篇 |
2002年 | 2篇 |
2001年 | 11篇 |
2000年 | 8篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 4篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 8篇 |
1990年 | 3篇 |
1989年 | 3篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 5篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1975年 | 2篇 |
1972年 | 2篇 |
1970年 | 1篇 |
排序方式: 共有282条查询结果,搜索用时 31 毫秒
141.
The Japanese rural coastal areas are inherently vulnerable to typhoons and tsunamis. Their vulnerability has been further
increasing recently, in part due to social factors such as the aging of society and depopulation. Following the Kobe earthquake
of 1995, the Japanese government has promoted the Voluntary Disaster Preparedness Organization (VDPO) to build communities
that are more sustainable and resilient to natural disasters. However, studies indicate that some VDPO activity has stagnated.
The present study focuses on a rural coastal area in Japan and examines whether VDPO impacts residents’ awareness of disaster
preparedness and also examines ties among the community. The study relies on a questionnaire survey. It reveals that VDPO
contributes to improving both awareness of disaster preparedness and ties in the community. 相似文献
142.
143.
Lyngbya majuscula is a benthic filamentous marine cyanobacterium, which in recent years appears to have been increasing in frequency and size of blooms in Moreton Bay, Queensland. It has a worldwide distribution throughout the tropics and subtropics in water to 30m. It has been found to contain a variety of chemicals that exert a range of biological effects, including skin, eye and respiratory irritation. The toxins lyngbyatoxin A and debromoaplysiatoxin appear to give the most widely witnessed biological effects in relation to humans, and experiments involving these two toxins show the formation of acute dermal lesions. Studies into the epidemiology of the dermatitic, respiratory and eye effects of the toxins of this organism are reviewed and show that Lyngbya induced dermatitis has occurred in a number of locations. The effects of aerosolised Lyngbya in relation to health outcomes were also reported. Differential effects of bathing behaviour after Lyngbya exposure were examined in relation to the severity of health outcomes. The potential for Lyngbya to exhibit differential toxicologies due to the presence of varying proportions of a range of toxins is also examined. This paper reviews the present state of knowledge on the effects of Lyngbya majuscula on human health, ecosystems and human populations during a toxic cyanobacterial bloom. The potential exists for toxins from Lyngbya majuscula affecting ecological health and in particular marine reptiles. 相似文献
144.
145.
The need for cross-disciplinary scientific inquiries that facilitate improved natural resource management outcomes through increased understanding of both the biophysical and human dimensions of management issues has been widely recognized. Despite this broad recognition, a number of obstacles and barriers still sometimes challenge the successful implementation of cross-disciplinary approaches. Improving understanding of these challenges and barriers will help address them and thereby foster appropriate and effective utilization of cross-disciplinary approaches to solve natural resource management challenges. This research uses a case study analysis of the United States National Estuarine Research Reserve System to improve understanding of the critical factors that influence practitioners’ decisions related to incorporating social science into their natural resource management work. The case study research is analyzed and evaluated within a Theory of Planned Behavior framework to (1) determine and describe the factors that predict practitioners’ intent to incorporate social science into their natural resource related activities and (2) recommend potential strategies for encouraging and enabling cross-disciplinary approaches to natural resource management. The results indicate that National Estuarine Research Reserve practitioners’ decisions related to incorporating social science are primarily influenced by (1) confidence in their own capability to incorporate social science into their work and (2) beliefs about whether the outcomes of incorporating social science into their work would be valuable or beneficial. 相似文献
146.
M. J. Watts J. O’Reilly A. L. Marcilla R. A. Shaw N. I. Ward 《Environmental geochemistry and health》2010,32(6):479-490
A field method is reported for the speciation of arsenic in water samples that is simple, rapid, safe to use beyond laboratory
environments, and cost effective. The method utilises solid-phase extraction cartridges (SPE) in series for selective retention
of arsenic species, followed by elution and measurement of eluted fractions by inductively coupled plasma mass spectrometry
(ICP-MS) for “total” arsenic. The method is suitable for on-site separation and preservation of arsenic species from water.
Mean percentage accuracies (n = 25) for synthetic solutions of arsenite (AsIII), arsenate (AsV), monomethylarsonic acid (MA), and dimethylarsinic acid (DMA) containing 10 μg l−1 As, were 98, 101, 94, and 105%, respectively. Data are presented to demonstrate the effect of pH and competing anions on
the retention of the arsenic species. The cartridges were tested in the UK and Argentina at sites where arsenic was known
to be present in surface and groundwaters, respectively, at elevated concentrations and under challenging matrix conditions.
In Argentinean groundwater, 4–20% of speciated arsenic was present as MA and 20–73% as AsIII. In UK surface waters, speciated arsenic was measured as 7–49% MA and 12–42% DMA. Comparative data from the field method
using SPE cartridges and the laboratory method using liquid chromatography coupled to ICP-MS for all water samples provided
a correlation of greater than 0.999 for AsIII and DMA, 0.991 for MA, and 0.982 for AsV (P < 0.01). 相似文献
147.
148.
149.
Soils initially contaminated with 36Cl in the chloride form were subjected to solid–liquid extractions using a variety of reagents including deionised water and 1 M sodium hydroxide (NaOH). 1 M NaOH was found to result in the greatest recovery of 36Cl from the soils, a result which provided initial evidence that radioactive chlorine became attached to humic substances present naturally within the soils. Deionised water and 1 M NaOH extracts were subjected to analysis involving separation by gel filtration chromatography (GFC). It was found that 36Cl in 1 M NaOH extracts associated preferentially with low molecular weight (LMW) fractions of humic substances whereas, in deionised water extracts, 36Cl appeared to be present exclusively in the chloride form. Previous literature evidence, mainly from highly organic forest soils, suggests that conversion of stable chlorine from chloride to organic forms can occur as a result of biological action. The present paper also presents good evidence for the specific attachment of stable chlorine (37Cl) to a LMW humic fraction, again demonstrated using GFC separation. Current risk assessments of the deep geological disposal of solid radioactive wastes containing 36Cl typically assume a very low degree of sorption based on the notion that the predominant environmental species of radiochlorine is chloride. This paper concludes with a brief discussion on the implications of organochlorine formation in the biosphere for assessment of the radiological impact of deep geological disposal of solid radioactive wastes. 相似文献
150.
M. Day K. Shaw D. Cooney J. Watts B. Harrigan 《Journal of Polymers and the Environment》1997,5(3):137-151
The degradability of several degradable polymers was examined using three types of degradation environments. These include
exposure in a laboratory-scale composting test system containing material representative of the organic fraction of municipal
solid waste (MSW), exposure in a thermal hydrolytic environment consisting of water at 60‡C, and exposure in a thermal-oxidative,
dry oven environment of 60‡C. The results of the investigation clearly indicate that, in addition to chemical and biological
activity which can lead to polymer degradation, physical restructuring and reorganization of the macromolecular structure
may also occur at temperatures typically found in a compost environment, resulting in changes in the mechanical properties
of the polymer films. In the case of the polyethylene-modified polymers evaluated in this study, all behaved similarly, but
differently from the other polymer types. The polyethylene-based films appeared to be susceptible to oxidative degradation
and should degrade in a composting environment providing that there is sufficient air in contact with the film for a sufficient
period of time. However, when exposed in a laboratory composter, it appears that although ideal temperature-time curves may
be obtained, the test time period was insufficient in comparison to the induction period required to achieve the desired thermal
oxidative degradation.
Issued as NRCC No. 37620. 相似文献