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261.
The ability of Dutch grassland soil and Dutch peat soil for methane oxidation was investigated. The kinetics of methane oxidation by soil from different depths were determined in batch cultures incubated with 1; 10; 100; and 10,000 ppmv methane, respectively. All 4 applied concentrations of methane were degraded by both types of soil. Thereby, the highest oxidative activities were observed between 5 and 10 cm soil depth. Most importantly, these experiments demonstrated that this soil acts as a sink for methane even at concentrations well below 1 ppmv. Especially at higher methane concentrations (100 - 10,000 ppmv) much higher degradation rates were found in the peat soil. This also correlates with the higher methane production rates which had been observed in peat soil. 相似文献
262.
Branimir?Jovan?i?evi?Email author Predrag?Poli? Miroslav?Vrvi? Georg?Scheeder Manfred?Teschner Hermann?Wehner 《Environmental Chemistry Letters》2003,1(1):73-81
Investigations presented in this paper were aimed at defining the alterations of n-alkane composition in cases of oil-polluted alluvial sediments. Therefore, oil-polluted groundwater samples, taken in five
different time intervals during a period of 28 months, were investigated. Samples of alluvial sediments were taken from two
boreholes within an oil refinery at Pancevo, Yugoslavia. In both boreholes significant alterations with characteristic degradation
of "oil" n-alkanes with no odd- or even-member predominance were observed, as well as subsequent synthesis of new ones with pronounced
even-member predominance, and with maxima at C16 and C18. Since no additional contamination of boreholes was observed by analyses of steranes and triterpanes, the observed changes
can only be attributed to microbial activity. It is assumed that for the degradation of oil n-alkanes, as well as for the synthesis of "new" n-alkanes, algae such as dinoflagellates are responsible. This assumption was confirmed by identification of n-alcohols with even-member predominance (C14–C20), by identification of cholesterol, as well as of n-fatty acids with even-member predominance (C14–C18) in the extract with n-alkane even-member predominance.
Electronic Publication 相似文献
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Lotze-Campen Hermann Verburg Peter H. Popp Alexander Lindner Marcus Verkerk Pieter J. Moiseyev Alexander Schrammeijer Elizabeth Helming John Tabeau Andrzej Schulp Catharina J. E. van der Zanden Emma H. Lavalle Carlo e Silva Filipe Batista Walz Ariane Bodirsky Benjamin 《Regional Environmental Change》2018,18(3):751-762
Regional Environmental Change - Protection of natural or semi-natural ecosystems is an important part of societal strategies for maintaining biodiversity, ecosystem services, and achieving overall... 相似文献
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Göpel Jan Schüngel Jan Schaldach Rüdiger Meurer Katharina H. E. Jungkunst Hermann F. Franko Uwe Boy Jens Strey Robert Strey Simone Guggenberger Georg Hampf Anna Parker Phillip 《Regional Environmental Change》2018,18(1):129-142
Regional Environmental Change - The calculation of robust estimates of future greenhouse gas emissions due to agriculture is essential to support the framing of the Brazilian climate change... 相似文献
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Hermann J. Jordan 《Die Naturwissenschaften》1927,15(48-49):937-942