全文获取类型
收费全文 | 356篇 |
免费 | 10篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 24篇 |
废物处理 | 20篇 |
环保管理 | 64篇 |
综合类 | 57篇 |
基础理论 | 64篇 |
环境理论 | 4篇 |
污染及防治 | 83篇 |
评价与监测 | 24篇 |
社会与环境 | 22篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 2篇 |
2022年 | 8篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 11篇 |
2018年 | 7篇 |
2017年 | 17篇 |
2016年 | 15篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 27篇 |
2012年 | 16篇 |
2011年 | 15篇 |
2010年 | 15篇 |
2009年 | 22篇 |
2008年 | 15篇 |
2007年 | 22篇 |
2006年 | 13篇 |
2005年 | 18篇 |
2004年 | 12篇 |
2003年 | 20篇 |
2002年 | 13篇 |
2001年 | 4篇 |
1999年 | 6篇 |
1998年 | 6篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1978年 | 3篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1954年 | 1篇 |
排序方式: 共有368条查询结果,搜索用时 109 毫秒
331.
332.
In this short review, the objectives and work of SAFE—the Special Non-invasive Advances in Fetal and Neonatal Evaluation Network, a European Union Framework VI network of excellence is described. We demonstrate how this network facilitates the implementation of non-invasive prenatal diagnosis (NIPD) for single gene disorders, fetal rhesus typing, aneuploidy and pregnancy complications. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
333.
A sustained decline in parental consent rates for perinatal autopsies has driven the development of less-invasive methods for death investigation. A wide variety of imaging modalities have been developed for this purpose and include post-mortem whole body magnetic resonance imaging (MRI), ultrasound, computed tomography (CT) and micro-focus CT techniques. These are also vital for “minimally invasive” methods, which include potential for tissue sampling, such as image guidance for targeted biopsies and laparoscopic-assisted techniques. In this article, we address the range of imaging techniques currently in clinical practice and those under development. Significant advances in high-field MRI and micro-focus CT imaging show particular promise for smaller and earlier gestation foetuses. We also review how MRI biomarkers such as diffusion-weighted imaging and organ volumetric analysis may aid diagnosis and image interpretation in the absence of autopsy data. Three-dimensional printing and augmented reality may help make imaging findings more accessible to parents, colleagues and trainees. 相似文献
334.
335.
Neil D. Westcott Randy A. Reichle 《Journal of environmental science and health. Part. B》2013,48(1):91-101
Abstract Residues of cypermethrin and deltamethrin in wheat herbage and grain and deltamethrin in sweetclover herbage were determined. Cypermethrin was applied at 28 g/ha to wheat and the residues on the herbage declined exponentially from 3.74 ppm immediately after spraying to 0.20 ppm 27 days after spraying. No cypermethrin residues were detected in the grain. Deltamethrin was applied at 6 g/ha to wheat and the residues on the herbage declined exponentially from 0.70 ppm immediatly after spraying to 0.05 ppm 27 days after spraying. No deltamethrin residues were detected in the grain. Deltamethrin was applied to sweetclover at 3, 4, 5, 10, and 16 g/ha. Residues on the herbage declined exponentially from 0.10, 0.16, 0.22, 0.40 and 0.70 ppm immediatly after spraying to 0.02, 0.03, 0.04, 0.15 and 0.18 ppm 5 days after spraying, respectively. 相似文献
336.
337.
Neil D. Weinstein 《Journal of environmental psychology》1982,2(2):87-97
It is commonly believed that people adapt rather easily to noise. This article reviews the available research, finding little evidence that any adaptation occurs in community settings. Much of this research, however, is open to alternative interpretations. The present study, examining reactions to traffic noise from the opening of a major new highway, was designed to remedy many of the problems with previous research. The investigation incorporated both a repeated measures design (the same respondents were interviewed 4 and 16 months after the highway opening) and an independent groups design (separate groups were interviewed either 4 or 16 months after opening). In addition, a pre-opening interview was carried out with the repeated measures panel. There was no evidence of appreciable adaptation in self-reported noise effects, annoyance, or tendency to focus attention on the noise. Instead respondents became more pessimistic about their ability to adapt to noise as time went by. 相似文献
338.
Health Impact Assessment (HIA) is increasingly being acknowledged as an important tool for considering the health implications of projects and programmes of activity at local, national and international levels. However, standard HIA tools can be difficult to apply when the policy of programme under consideration is particularly complex and intertwined or where significant time, resource and skill constraints are involved. This paper describes a Health Impact Review (HIR) of the plans for a major redevelopment of Central Manchester Hospitals (England). This approach to HIA drew not only from HIR but also from Integrated Impact Assessment (IIA) in order to produce a summary of the most significant health impacts of a policy, programme or project in a more timely and cost-effective way. This example highlights the potential for involving Local Authority Overview and Scrutiny Committees in the HIA process as a way of ensuring that the recommendations of HIA are mainstreamed as part of the ongoing development of projects. 相似文献
339.
R. Subramanian Neil M. Donahue Anna Bernardo-Bricker Wolfgang F. Rogge Allen L. Robinson 《Atmospheric environment (Oxford, England : 1994)》2006,40(40):8002-8019
We present estimates of the vehicular contribution to ambient organic carbon (OC) and fine particle mass (PM) in Pittsburgh, PA using the chemical mass balance (CMB) model and a large dataset of ambient molecular marker concentrations. Source profiles for CMB analysis are selected using a method of comparing the ambient ratios of marker species with published profiles for gasoline and diesel vehicle emissions. The ambient wintertime data cluster on a hopanes/EC ratio–ratio plot, and therefore can be explained by a large number of different source profile combinations. In contrast, the widely varying summer ambient ratios can be explained by a more limited number of source profile combinations. We present results for a number of different CMB scenarios, all of which perform well on the different statistical tests used to establish the quality of a CMB solution. The results illustrate how CMB estimates depend critically on the marker-to-OC and marker-to-PM ratios of the source profiles. The vehicular contribution in the winter is bounded between 13% and 20% of the ambient OC (274±56–416±72 ng-C m−3). However, variability in the diesel profiles creates uncertainty in the gasoline–diesel split. On an OC basis, one set of scenarios suggests gasoline dominance, while a second set indicates a more even split. On a PM basis, all solutions indicate a diesel-dominated split. The summer CMB solutions do not present a consistent picture given the seasonal shift and wide variation in the ambient hopanes-to-EC ratios relative to the source profiles. If one set of source profiles is applied to the entire dataset, gasoline vehicles dominate vehicular OC in the winter but diesel dominates in the summer. The seasonal pattern in the ambient hopanes-to-EC ratios may be caused by photochemical decay of hopanes in the summer or by seasonal changes in vehicle emission profiles. 相似文献
340.
Nerissa K. Hannink Susan J. Rosser Christopher E. French Neil C. Bruce 《Water, Air, & Soil Pollution: Focus》2003,3(3):251-258
The manufacture and improper disposal of explosives has resulted in a significant amount of land requiring remediation. The compound 2,4,6-trinitrotoluene (TNT) is the most persistent and toxic of the explosive pollutants with current treatment methods being energy intensive and costly. Bacterial enzymes such as pentaerythritol tetranitrate reductase (PETNR) from Enterobacter cloacae PB2 have been found to have activity against TNT; however, microbes often lack the biomassnecessary for remediation applications. The PETNRgene (onr1) was transformed into tobacco plants in an attempt to combine the metabolic diversity of microbes with the sequestering properties of plants. The resulting transgenic plants were shown to have enhanced tolerance to TNT during germination and as seedlings. Phytoremediation applications with these plants may provide an alternative treatment of TNT contamination. 相似文献