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131.
Thomas J. Fredette Joseph D. Germano Drew A. Carey Peggy M. Murray Paula G. Kullberg 《Chemistry and Ecology》1992,7(1):173-194
Geochemical analysis and visual inspection of cores collected from capped dredged material mounds revealed that in many cores, cap material was clearly distinguishable, both visually and chemically, from mound material. Contaminated dredged sediments were disposed in Long Island Sound eleven and seven years prior to sampling, and capped with uncontaminated dredged sediments. Core data provided no conclusive evidence of physical disturbance of, or chemical migration from, the contaminated mound sediments. Obvious chemical gradients of contaminant concentrations, which we propose are indicators of chemical migration, were not detected in the cores. Heterogeneity of the cap and mound sediments in some cores made the interface less distinct. We postulate that the preservation of spatial variability of sediment texture and associated contaminants observed within dredged material mounds is a result of the dredging process. Preservation of the textural and contaminant history of dredged sediments within finegrained cohesive cap materials provides evidence of the absence of physical or chemical disturbance. 相似文献
132.
Espinosa-Barrera Paula Andrea Delgado-Vargas Carlos Andrés Martínez-Pachón Diana Moncayo-Lasso Alejandro 《Environmental science and pollution research international》2021,28(19):23984-23994
Environmental Science and Pollution Research - This work deals with the theoretical approach of biodegradability, lipophilicity, and physiological activity of VAL and four degradation products... 相似文献
133.
Drăghia Lavinia Paula Lukinich-Gruia Alexandra Teodora Oprean Camelia Pavlović Nikola M. Păunescu Virgil Tatu Călin Adrian 《Environmental geochemistry and health》2021,43(10):4163-4178
Environmental Geochemistry and Health - Aristolochic acid I (AAI) is a potent nephrotoxic and carcinogenic compound produced by plants of the Aristolochiaceae family and thoroughly investigated as... 相似文献
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In recent years, there has been a growing concern and an increasing number of proactive initiatives from various stakeholders on issues related to the environment, social matters, and economic aspects and this has been the main driving force toward sustainability. However, most players that are deeply involved with environmental and social agendas indicate that these actions have been more of a temporary palliative for the current unsustainability problems than real structural solutions, especially in what concerns the relationship between short-term actions and long-term structural planning. Even though the general literature on sustainability is comprehensive, there is a paucity of papers which look at it at the organizational level, and under a cross-sectoral perspective. This paper is an attempt to address this gap. It presents the concept of ‘Hybrid Bottom Line’ as a new perspective in understanding and sustainability at the organizational level. 相似文献
136.
Jean-Fran?ois?Lema?treEmail author Steven?A.?Ramm Nicola?Jennings Paula?Stockley 《Behavioral ecology and sociobiology》2012,66(1):97-105
Since genital morphology can influence the outcome of post-copulatory sexual selection, differences in the genitalia of dominant
and subordinate males could be a factor contributing to the fertilisation advantage of dominant males under sperm competition.
Here we investigate for the first time if penile morphology differs according to male social status in a promiscuous mammal,
the bank vole (Myodes glareolus). In this species, dominant males typically achieve higher reproductive success than subordinates in post-copulatory sexual
selection, and male genital morphology is complex, including both a baculum (os penis) and penile spines. Our results show
that despite no difference in body size associated with male social status, baculum width is significantly larger in dominant
male bank voles than in subordinates. We also found evidence of positive allometry and a relatively high coefficient of phenotypic
variation in the baculum width of male bank voles, consistent with an influence of sexual selection. By contrast, baculum
length and three measures of penile spinosity did not differ according to male social status or show evidence of positive
allometry. We conclude that dominant male bank voles may benefit from an enlarged baculum under sperm competition and/or cryptic
female choice and that differences in penile morphology according to male social status might be important but as yet largely
unexplored source of variation in male reproductive success. 相似文献
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Chieu Anh Kim Ta Paula A. Pebsworth Rui Liu Stephen Hillier Nia Gray John T. Arnason Sera L. Young 《Environmental geochemistry and health》2018,40(2):803-813
Geophagy, the deliberate consumption of earth materials, is common among humans and animals. However, its etiology and function(s) remain poorly understood. The major hypotheses about its adaptive functions are the supplementation of essential elements and the protection against temporary and chronic gastrointestinal (GI) distress. Because much less work has been done on the protection hypothesis, we investigated whether soil eaten by baboons protected their GI tract from plant secondary metabolites (PSMs) and described best laboratory practices for doing so. We tested a soil that baboons eat/preferred, a soil that baboons never eat/non-preferred, and two clay minerals, montmorillonite a 2:1 clay and kaolinite a 1:1 clay. These were processed using a technique that simulated physiological digestion. The phytochemical concentration of 10 compounds representative of three biosynthetic classes of compounds found in the baboon diet was then assessed with and without earth materials using high-performance liquid chromatography with diode-array detection (HPLC–DAD). The preferred soil was white, contained 1% halite, 45% illite/mica, 14% kaolinite, and 0.8% sand; the non-preferred soil was pink, contained 1% goethite and 1% hematite but no halite, 40% illite/mica, 19% kaolinite, and 3% sand. Polar phenolics and alkaloids were generally adsorbed at levels 10× higher than less polar terpenes. In terms of PSM adsorption, the montmorillonite was more effective than the kaolinite, which was more effective than the non-preferred soil, which was more effective than the preferred soil. Our findings suggest that HPLC–DAD is best practice for the assessment of PSM adsorption of earth materials due to its reproducibility and accuracy. Further, soil selection was not based on adsorption of PSMs, but on other criteria such as color, mouth feel, and taste. However, the consumption of earth containing clay minerals could be an effective strategy for protecting the GI tract from PSMs. 相似文献