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151.
Rainer Haas Alfred Krippendorf und Klaus Steinbach 《Umweltwissenschaften und Schadstoff-Forschung》1997,9(5):243-244
Zusammenfassung Phenylarsindichlorid (PFIFFIKUS) reagiert bei Raumtemperatur in einer Gleichgewichtsreaktion schnell mit Alkoholen unter Bildung
von Phenylarsinbisether und Phenylarsinchloridether. Die Reaktionen verlaufen nicht quantitativ. Die Derivate wurden massenspektrometrisch
identifiziert.
相似文献
152.
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154.
Vegetation Diversity after Logging in the Southern Appalachians 总被引:1,自引:0,他引:1
155.
After the discovery of high dioxin levels (>100 000 ng TE BGA/kg) in copper slag (Kieselrot) from a specific chlorinating roasting process performed in Marsberg, human milk samples from mothers living in Marsberg were analyzed for polychlorinated dibenzo-p-dioxins (PCDD), dibenzofurans (PCDF) and other pollutants. PCDD/F levels in all samples were comparable with levels in human milk samples from other locations in the Federal Republic of Germany. An increase in congeners, especially of those predominating in ?Kieselrot“, could not be measured. Although several thousand tons of dioxin contaminated copper slag still lie on the slagheap, a higher burden in human milk from Marsberg could not be observed. 相似文献
156.
Sönnke Lustig Rudolph Schierl Friedrich Alt Eckard Helmers Klaus Kümmerer 《Environmental Sciences Europe》1997,9(3):149-152
Since the introduction of automotive exhaust catalysts in 1984, an intensive discussion started about the emission of platinum group metals and their effect on mankind and the environment. Several platinum compounds are known to be potent sensitizers, even at very small doses. In spite of both the scientific and public interest in this important field, the collection and coordination of scientific research and its conclusions continues to be a lacking. The present results from analytical chemistry, ecology, toxicology and occupational medicine are summarized here. This state of the art indicates the great need for further investigations concerning especially the assessment of emission sources and bioavailability studies for platinum as well as palladium and rhodium. 相似文献
157.
158.
Summary Wild short-toed tree creepers in southern Germany were exposed to tape recordings of seven song types from other dialects or song institutions and sixteen song types from thirteen handreared Middle European birds. One song type from southern Germany was used as a control. The males reacted strongly to two slightly different Spaish dialects and not at all or only feebly to one song institution from Cyprus and four from Morocco. The song types of the hand-reared birds had less effect than controls. The songs of two birds from southern Germany hand-raised together were quite similar to those from Cyprus. We conclude that Cyprus and North Africa on the outskirts of the species distribution were colonized by short-toed tree creepers who had had no opportunity to learn their songs from adult conspecifics. 相似文献
159.
Bruno S Frey Friedrich Schneider Werner W Pommerehne 《Journal of Environmental Economics and Management》1985,12(1):62-71
Incentive instruments (effluent charges) are theoretically expected to be preferred to direct regulations (individual emission ceilings) by university-employed, theoretically inclined politically right-wing, professional economists living in a market-oriented country, ceteris paribus. Public sector employed, politically left-wing, professional economists living in a country with a long tradition of government involvement prefer the regulatory approach, ceteris paribus. These theoretical hypotheses tend to be supported by a bivariate probit analysis based on a survey of more than 1400 economists in five countries. 相似文献
160.