Microbial degradation of cellulosic material under intermediate-level waste simulated conditions

Organic degradation under simulated Martian conditions.

We report on laboratory experiments which simulate the breakdown of organic compounds under Martian surface conditions. Chambers containing Mars-analog soil mixed with the amino acid glycine were evacuated and filled to 100 mbar pressure with a Martian atmosphere gas mixture and then irradiated with a broad spectrum Xe lamp. Headspace gases were periodically withdrawn and analyzed via gas chrom...

Long term behaviour of low and intermediate level waste packages under repository conditions

Degradation of orthodontic wires under simulated cariogenic and erosive conditions.

This study examined the effect of cariogenic and erosive challenges (CCs and ECs, respectively) on the degradation of copper-nickel-titanium (CuNiTi) orthodontic wires. Sixty wire segments were divided into four treatment groups and exposed to CCs, ECs, artificial saliva, or dry storage (no-treatment control). CC and EC were simulated using a demineralizing solution (pH 4.3) and a citric acid s...

Microbial Transformation of Organotin Compounds under Simulated Landfill Conditions

M icbial Trsform aion of O rgnotin C om punds uder im uated Ldfill C onitions Liöping 2007 The cycling of tin is a topic of concern because of its anthropogenic entry of organotin compounds into the environment. Special attention is given to the transformation of organotins and the methylation of inorganic tin, since these processes often give rise to more toxic formulations. By far the largest...

Microbial Degradation of Shrimp Waste in Soil

This study presents results of research on a number of microorganisms in soil of the Chełmżyńskie lake watershed and their role in the decomposition of chitin. The authors also examined the level of respiration activity of soil in the presence of shrimp waste. Results demonstrate that the number of microorganisms in soil were variable. During the entire research period, the analyzed groups of m...