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341.
Karl H. Deubert Robert M. Devlin Marian J. Kisiel Andrzej S. Kostusiak 《Environment international》1979,2(2):91-93
Corn seeds responded to soaking in aqueous solutions of benzo(a)pyrene with increased root growth. Growth stimulation decreased from 14% to 0 with increasing concentrations (0.0005–0.02 ppm), and with increasing soaking times (6 and 12 hr). Shoot growth and dry weights of shoots were not affected. Wheat did not respond as distinctly as corn to similar treatments. A decrease in the growth of shoots and roots with increasing BaP concentrations was not statistically significant. 相似文献
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Guntram Koller Konrad Hungerbühler Karl Fent 《Environmental science and pollution research international》2000,7(3):135-143
A significant problem for effect assessment of aquatic ecosystems arises from the large ranges of toxicity data, which can
be found in different databases and literature. Here, ranges are given for the aquatic toxicity of 27 high production volume
chemicals. Based on these illustrative examples and on the current literature on uncertainty in aquatic effect assessment,
toxicity ranges are discussed for their possible causes (variation in experimental condition, species, endpoint, time) and
ways to handle them (safety factors). Implications and recommendations on the procedure of risk analysis of chemical substances
are drawn. Two main requirements for a comprehensive risk assessment are identified, which often play a minor role in current
practice (as they are often neglected) as well as in scientific discussion (as they are meant to be trivial). First, data
quality must be checked critically before applying any result of a toxicity test. Secondly, experimental data should take
into account different species and acute as well as chronic data. If these aspects are considered in risk analysis, which
is common practice in ecotoxicology but not always in the context of practical applications in risk engineering, a more comprehensive
picture of the environmental toxicity of a chemical substance can be obtained. 相似文献
344.
We explore the topic of restorative justice in organizations. The tradition of restorative justice directs attention to the aftermath of wrongdoing. We highlight three ways offenders (making amends), victims (extending forgiveness), and organizations (fostering reintegration) restore justice in the workplace. Our paper concludes with questions for future research and inquiry. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
345.
Lavorel Sandra Grigulis Karl Leitinger Georg Kohler Marina Schirpke Uta Tappeiner Ulrike 《Regional Environmental Change》2017,17(8):2251-2264
Regional Environmental Change - Land use and spatial patterns which reflect social-ecological legacies control ecosystem service (ES) supply. Yet, temporal changes in ES bundles associated with... 相似文献
346.
Rodrigo Navia Olga Rubilar M Cristina Diez Karl-Heinz Schmidt Gerhard Behrendt Karl E Lorber 《Waste management & research》2007,25(2):119-129
The volcanic soils of southern Chile have demonstrated a high capacity to adsorb environmental pollutants, but for an industrial application, a stable solid material is necessary. The objective of this work was to produce a stable ceramic material through a process involving volcanic soil-polyurethane foam produced with recycled polyethylene terephthalate (PET)-polyols, and further thermal treatment. The selected foam formulation with 35.4% volcanic soil (< 63 microm) seems to be the most suitable for thermal treatment, with temperature steps at 700, 850, 1000 and 1200 degrees C. The porous ceramic material obtained has a stable solid form and an improved chlorophenols adsorption capacity (comparable to natural zeolites) that makes it suitable for advanced wastewater treatment and landfill leachate depuration. 相似文献
347.
Biodegradation experiments of various polycyclic aromatic hydrocarbons were studied with mixed bacteria culture under aerobic conditions. An easy‐to‐handle clean‐up procedure was developed for PAH and their metabolites simultaneously as well as a gc‐ms‐method to identify and quantify these compounds. Anthracene and dibenzothiophene are completely degradable in an aqeous system, whereas biodegradation of benzo(k)fluoranthene and benzo(h)quinoline is possible only in an oil‐in‐water‐system with dodecane as cosubstrate. No degradation of nitronaphthalene was observed in aqueous systems. New metabolites are 2,3‐dihydroxybenzothiophene, hydroxybenzothiophenecarbonic acid and benzothiophenequinone for dibenzothiophene and hydroxyfluoranthenic acid for benzo(k)flouranthene. Whereas the former metabolites are degradable under the experimental conditions, the latter accumulates during the degradation experiment. The results are important for microbiological wastewater treatment, since knowledge of biodegradation processes is indespensable for the successful treatment of PAH‐containing wastewater. 相似文献
348.
Rodrigo Navia Bárbara Fuentes María C Diez Karl E Lorber 《Waste management & research》2005,23(3):260-269
The volcanic soil of Southern Chile was tested for its heavy metal retention capacity. The maximum uptakes for CrO4(2-) (CrVI), Cu(2+), Zn(2+) and Pb(2+) were determined to be 2.74, 5.32, 5.86 and 7.44 mg g(-1), respectively. At a slightly alkaline pH value (7.5), it seems that a precipitation-adsorption process was responsible for the Cu(2+) and Zn(2+) uptake onto volcanic soil. All the determined values are of the same order of magnitude as natural zeolites heavy metals adsorption capacities. In addition, the heavy metals diffusion model through a 1 m volcanic soil mineral liner shows breakthrough times of 21.6, 10.2 and 8.9 years, for Pb(2+), Zn(2+) and Cu(2+), respectively, confirming the trend obtained in the adsorption isotherms. The natural volcanic soil of Southern Chile is an interesting material for possible use as landfill mineral basal sealing. It has an appropriate sealing potential (average Kf value of 5.85 x 10(-9) m s(-1)) and a heavy metals retention capacity comparable with natural zeolites. About two-thirds of the agricultural land in Chile (approximately 0.4 million km2) is derived from volcanic ash, suggesting an important soil volume for future landfill projects, that could be obtained in sufficient quantities from urban building activities. 相似文献
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