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Université de Neuchâtel

Isotope fractionation due to diffusion and sorption of chlorinated hydrocarbons and its implications for identifying reactive processes in aquifer - aquitard systems

Wanner, Philipp ; Hunkeler, Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2016.

Chlorinated hydrocarbons are anthropogenic contaminants, which are known to be possibly carcinogenic to humans. Although the peak production of chlorinated hydrocarbons in the 1970ties was followed by a dramatic decrease in the subsequent decades, chlorinated hydrocarbons are still frequently detected in aquifer systems demonstrating their long-term persistence. When chlorinated hydrocarbons are...

Consortium of Swiss Academic Libraries

Chlorophyll breakdown in oilseed rape

Hörtensteiner, Stefan ; Kräutler, Bernhard

In: Photosynthesis Research, 2000, vol. 64, no. 2-3, p. 137-146

Université de Neuchâtel

Effect of molecule size on carbon isotope fractionation during biodegradation of chlorinated alkanes by Xanthobacter autotrophicus GJ10

Yumiko, Abe ; Zopfi, Jakob ; Hunkeler, Daniel

In: Isotopes in Environmental and Health Studies, 2009, vol. 45, no. 1, p. 18-26

The effect of the number of carbon and chlorine atoms on carbon isotope fractionation during dechlorination of chlorinated alkanes by Xanthobacter autotrophicus GJ10 was studied using pure culture and cell-free extract experiments. The magnitude of carbon isotope fractionation decreased with increasing carbon number. The decrease can be explained by an increasing probability that the heavy...

Université de Neuchâtel

Migration et environnement = étude de cas sur les flux migratoires à destination de La Paz et El Alto, Bolivie

Guélat, Jérémie ; Piguet, Etienne (Dir.)

Mémoire de master : Université de Neuchâtel, 2011.

Certains rapports de ces dernières années mettent en exergue les liens entre migration et changement climatique, et précisent les risques liés à ces mécanismes pour les sociétés et l’environnement. Cette recherche vise à présenter les caractéristiques de certains flux migratoires à destination de La Paz et El Alto, en Bolivie. Elle s’attache à définir, dans un premier temps,...

Université de Neuchâtel

Differential Transport of Atrazine and Glyphosate in Undisturbed Sandy Soil Column

Zhou, Yu ; Wang, Y. ; Hunkeler, Daniel ; Zwahlen, François ; Boillat, J.

In: Differential Transport of Atrazine and Glyphosate in Undisturbed Sandy Soil Column, 2010, vol. 19, p. 365-377

With increasing awareness and concern for environmental quality, it is important to study the fate of pesticides in the subsurface. Laboratory studies were conducted to determine the behavior of atrazine and glyphosate within the root zone of an undisturbed sandy soil in Jianghan Plain, central China. Chloride as a tracer for water movement was applied to the soil as KCl for 26 hours before...

Université de Fribourg

WDX studies on ceramic diffusion barrier layers of metal supported SOECs

Wiedenmann, Daniel ; Vogt, U. F. ; Soltmann, C. ; Patz, O. ; Schiller, G. ; Grobéty, Bernard

In: Fuel Cells, 2009///doi: 10.1002/fuce.200800118

Solid oxide electrolyser cells (SOECs) have great potential for efficient and economical production of hydrogen fuel. Element diffusion between the Ni-cermet electrode and the metal substrate of metal supported cells (MSC) is a known problem in fuel cell and electrolysis technology. In order to hinder this unintentional mass transport, different ceramic diffusion barrier layers (DBLs) are...

Université de Neuchâtel

Assessment of in situ biodegradation of chlorinated solvents in aquifers and constructed wetlands using an integrative approach

Imfeld, Gwenaël ; Hunkeler, Daniel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th.2069.

Knowledge about biogeochemical processes associated with natural attenuation of chlorinated solvents in the environment is currently limited. Though processes such as sorption, volatilization or dilution may contribute to contaminant natural attenuation, in situ biodegradation is the only process leading to destructive removal of contaminants. However, the distribution of hydrological and...

Université de Neuchâtel

Development of a scanning force microscope for in-vivo, minimally invasive inspection of human knee cartilage

Imer, Raphaël ; Staufer, Urs (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th. 2043.

Osteoarthritis (OA) is a painful and disabling joint disease that is characterized by degradation of articular cartilage. It affects, most often, middle-aged and older people. However, young and sportive people can also develop osteoarthritis (OA), often as a result of severe knee injuries like ligament rupture, meniscus lesion or joint dislocation. For an early diagnosis of this disease and...