全文获取类型
收费全文 | 104篇 |
免费 | 3篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 4篇 |
环保管理 | 25篇 |
综合类 | 10篇 |
基础理论 | 17篇 |
污染及防治 | 39篇 |
评价与监测 | 5篇 |
社会与环境 | 3篇 |
灾害及防治 | 2篇 |
出版年
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 2篇 |
2017年 | 1篇 |
2016年 | 8篇 |
2015年 | 4篇 |
2014年 | 6篇 |
2013年 | 10篇 |
2012年 | 3篇 |
2011年 | 17篇 |
2010年 | 7篇 |
2009年 | 5篇 |
2008年 | 7篇 |
2007年 | 2篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2002年 | 6篇 |
2001年 | 2篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1991年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
排序方式: 共有110条查询结果,搜索用时 265 毫秒
71.
Fureix C Hausberger M Seneque E Morisset S Baylac M Cornette R Biquand V Deleporte P 《Die Naturwissenschaften》2011,98(7):583-592
Describing postures has always been a central concern when studying behaviour. However, attempts to compare postures objectively
at phylogenetical, populational, inter- or intra-individual levels generally either rely upon a few key elements or remain
highly subjective. Here, we propose a novel approach, based on well-established geometric morphometrics, to describe and to
analyse postures globally (i.e. considering the animal’s body posture in its entirety rather than focusing only on a few salient
elements, such as head or tail position). Geometric morphometrics is concerned with describing and comparing variation and
changes in the form (size and shape) of organisms using the coordinates of a series of homologous landmarks (i.e. positioned
in relation to skeletal or muscular cues that are the same for different species for every variety of form and function and
that have derived from a common ancestor, i.e. they have a common evolutionary ancestry, e.g. neck, wings, flipper/hand).
We applied this approach to horses, using global postures (1) to characterise behaviours that correspond to different arousal
levels, (2) to test potential impact of environmental changes on postures. Our application of geometric morphometrics to horse
postures showed that this method can be used to characterise behavioural categories, to evaluate the impact of environmental
factors (here human actions) and to compare individuals and groups. Beyond its application to horses, this promising approach
could be applied to all questions involving the analysis of postures (evolution of displays, expression of emotions, stress
and welfare, behavioural repertoires…) and could lead to a whole new line of research. 相似文献
72.
Leclaire S White J Arnoux E Faivre B Vetter N Hatch SA Danchin E 《Die Naturwissenschaften》2011,98(9):773-782
Carotenoid pigments are important for immunity and as antioxidants, and carotenoid-based colors are believed to provide honest
signals of individual quality. Other colorless but more efficient antioxidants such as vitamins A and E may protect carotenoids
from bleaching. Carotenoid-based colors have thus recently been suggested to reflect the concentration of such colorless antioxidants,
but this has rarely been tested. Furthermore, although evidence is accruing for multiple genetic criteria for mate choice,
carotenoid-based colors have rarely been shown to reflect both phenotypic and genetic quality. In this study, we investigated
whether gape, tongue, eye-ring, and bill coloration of chick-rearing black-legged kittiwakes Rissa tridactyla reflected circulating levels of carotenoids and vitamins A and E. We further investigated whether integument coloration reflected
phenotypic (body condition and fledging success) and genetic quality (heterozygosity). We found that the coloration of fleshy
integuments was correlated with carotenoid and vitamin A levels and fledging success but only in males. Furthermore, the coloration
of tongue and eye-ring was correlated with heterozygosity in both males and females. Integument colors might therefore be
reliable signals of individual quality used by birds to adjust their parental care during the chick-rearing period. 相似文献
73.
Lance A. Waller 《Environmental and Ecological Statistics》2008,15(3):259-263
The three papers included in this special issue represent a set of presentations in an invited session on disease ecology
at the 2005 Spring Meeting of the Eastern North American Region of the International Biometric Society. The papers each address
statistical estimation and inference for particular components of different disease processes and, taken together, illustrate
the breadth of statistical issues arising in the study of the ecology and public health impact of disease. As an introduction,
we provide a very brief overview of the area of “disease ecology”, a variety of synonyms addressing different aspects of disease
ecology, and present a schematic structure illustrating general components of the underlying disease process, data collection
issues, and different disciplinary perspectives ranging from microbiology to public health surveillance.
相似文献
Lance A. WallerEmail: |
74.
Ryan A. Wymore Tamzen W. Macbeth Joseph S. Rothermel Lance N. Peterson Lee O. Nelson Kent S. Sorenson Naji Akladiss Ian R. Tasker 《补救:环境净化治理成本、技术与工艺杂志》2006,16(4):5-22
An Interstate Technology and Regulatory Council (ITRC) forum was recently held that focused on case studies in which bioremediation of dense nonaqueous‐phase liquids (DNAPLs) was performed. This first case study, the Test Area North (TAN) site of the Idaho National Engineering and Environmental Laboratory, involves a trichloroethene (TCE) residual source area in a deep, fractured basalt aquifer that has been undergoing enhanced bioremediation since January 1999. Complete dechlorination from TCE to ethene was documented within nine months of operation, and sodium lactate injections were shown to enhance TCE mass transfer from the residual source. Since that time, optimization of injection strategies has maintained efficient dechlorination while demonstrating accelerated cleanup at a lower cost by changing to a whey powder amendment that solubilizes DNAPL. © 2006 Wiley Periodicals, Inc. 相似文献
75.
Matthias Schrter Emilie Crouzat Lisanne Hlting Julian Massenberg Julian Rode Mario Hanisch Nadja Kabisch Julia Palliwoda Jrg A. Priess Ralf Seppelt Michael Beckmann 《Ambio》2021,50(2):289
Conservation efforts are increasingly supported by ecosystem service assessments. These assessments depend on complex multi-disciplinary methods, and rely on a number of assumptions which reduce complexity. If assumptions are ambiguous or inadequate, misconceptions and misinterpretations may arise when interpreting results of assessments. An interdisciplinary understanding of assumptions in ecosystem service science is needed to provide consistent conservation recommendations. Here, we synthesise and elaborate on 12 prevalent types of assumptions in ecosystem service assessments. These comprise conceptual and ethical foundations of the ecosystem service concept, assumptions on data collection, indication, mapping, and modelling, on socio-economic valuation and value aggregation, as well as about using assessment results for decision-making. We recommend future assessments to increase transparency about assumptions, and to test and validate them and their potential consequences on assessment reliability. This will support the taking up of assessment results in conservation science, policy and practice.Electronic supplementary materialThe online version of this article (10.1007/s13280-020-01379-9) contains supplementary material, which is available to authorized users. 相似文献
76.
77.
Polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) were measured in blubber biopsy samples from 22 live-captured Steller sea lions (Eumetopias jubatus) that had just entered the Strait of Georgia, British Columbia, Canada, for their overwintering feeding season. ∑PBDE ranged from 50 μg kg−1 (lipid weight) in adult females to 3780 μg kg−1 in subadult individuals. ∑PCBs ranged from 272 μg kg−1 in adult females to 14 280 μg kg−1 in subadult individuals. While most PBDE and PCB congeners were transferred through milk to pups, PCBs with log KOW > 7.0 (PCBs 206, 207, 208 and 209) appeared constrained, resulting in a lighter mixture in pups compared to adult females. The ratio of individual PCB congeners by metabolic group (Groups I, II, III, IV and V) to PCB-153 regressed against length of males suggested poor biotransformation of these compounds (slopes did not differ from zero, p > 0.05). PBDE congeners 49, 99, 153 and 183 appeared bioaccumulative (slopes of ratio BDE/PCB 153 versus length were higher than zero, p < 0.05), but the dominance of the single congener, BDE-47 (64% of total PBDEs), likely due in part to debromination pathways, reduced our ability to explore congener-specific dynamics of PBDEs in these pinnipeds. With 80% of our Steller sea lions exceeding a recent toxicity reference value for PCBs, the fasting-associated mobilization of these contaminants raises concerns about a heightened vulnerability to adverse effects during annual migrations. 相似文献
78.
David G. Angeler Craig R. Allen Ahjond S. Garmestani Lance H. Gunderson Igor Linkov 《The Environmentalist》2016,36(3):225-228
Environmental sciences have an important role in informing sustainable management of built environments by providing insights about the drivers and potentially negative impacts of global environmental change. Here, we discuss panarchy theory, a multi-scale hierarchical concept that accounts for the dynamism of complex socio-ecological systems, especially for those systems with strong cross-scale feedbacks. The idea of panarchy underlies much of system resilience, focusing on how systems respond to known and unknown threats. Panarchy theory can provide a framework for qualitative and quantitative research and application in the environmental sciences, which can in turn inform the ongoing efforts in socio-technical resilience thinking and adaptive and transformative approaches to management. 相似文献
79.
80.
Lance Wallace Cynthia Howard-Reed 《Journal of the Air & Waste Management Association (1995)》2013,63(7):828-844
Abstract Continuous monitors were employed for 18 months in an occupied townhouse to measure ultrafine, fine, and coarse particles; air change rates; wind speed and direction; temperature; and relative humidity (RH). A main objective was to document short-term and long-term variation in indoor air concentrations of size-resolved particles (0.01-20 μm) caused by (1) diurnal and seasonal variation of outdoor air concentrations and meteorological variables, (2) indoor sources such as cooking and using candles, and (3) activities affecting air change rates such as opening windows and using fans. A second objective was to test and compare available instruments for their suitability in providing real-time estimates of particle levels and ancillary variables. Despite different measuring principles, the instruments employed in this study agreed reasonably well for particles less than 10 μm in diameter. The three instruments measuring fine and coarse particles (aerodynamic diameter between 0.3 and 20 μm) agreed to within 30% in their overall estimates of total volume. Two of these instruments employed optical scattering, and the third used an aerodynamic acceleration principle. However, several lines of evidence indicated that the instrument employing aerodynamic acceleration overestimated concentrations for particle diameters greater than 10 μm. A fourth instrument measuring ultrafine and accumulation-mode particles (0.01-1 μm) was operated with two different inlets providing somewhat different particle size ranges. The two inlets agreed in the ultrafine region (<0.1 μm) but diverged increasingly for larger particles (up to 0.445 μm). Indoor sources affecting ultrafine particle concentrations were observed 22% of the time, and sources affecting fine and coarse particle concentrations were observed 12 and 15% of the time, respectively. When an indoor source was operating, particle concentrations for different sizes ranged from 2 to 20 times the average concentrations when no indoor source was apparent. Indoor sources, such as cooking with natural gas, and simple physical activities, such as walking, accounted for a majority (50-90%) of the ultrafine and coarse particle concentrations, whereas outdoor sources were more important for accumulation-mode particles between 0.1 and 1 um in diameter. Averaged for the entire year and including no periods when indoor sources were apparent, the number distribution was bimodal, with a peak at ~10 nm (possibly smaller), a shallow minimum at ~14 nm, and a second broad peak at ~68 nm. The volume distribution was also bimodal, with a broad peak at ~200 nm, a minimum at ~1.2 μm, and then an upward slope again through the remaining size fractions. A database was created on a 5-min averaging time basis. It contains more than 90,000 measurements by two of the instruments and approximately 30,000 by the two optical scattering instruments. About 4500 hour-long average air change rates were also calculated throughout the year using a dedicated gas chromatograph with electron capture detection (GC/ECD). At high air change rates [>0.8 air changes per hour (hr?1)], particle concentrations were either elevated (when no source was present) or depressed (when an indoor source was operating) by factors of up to 2 compared with low air change rates. 相似文献