TY  - JOUR
A1  - Brehmer, Ludwig
A1  - Hahn, M.
A1  - Seifert, M.
A1  - Wernecke, R.
A1  - Jäger, Werner
A1  - Wonnenberg, R.
A1  - Zehner, C.
T1  - Verfahren zur Herstellung eines Feuchtsensor
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Brehmer, Ludwig
A1  - Hahn, M.
A1  - Seifert, M.
A1  - Wernecke, R.
A1  - Jäger, Werner
A1  - Wonnenberg, R.
A1  - Zehner, C.
T1  - Feuchtesensor
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Balcke, Gerd U.
A1  - Hahn, M.
A1  - Oswald, Sascha Eric
T1  - Nitrogen as an indicator of mass transfer during in-situ gas sparging
JF  - Journal of contaminant hydrology
N2  - Aiming at the stimulation of intrinsic microbial activity, pulses of pure oxygen or pressurized air were recurrently injected into groundwater polluted with chlorobenzene. To achieve well-controlled conditions and intensive sampling, a large, vertical underground tank was filled with the local unconfined sandy aquifer material. In the course of two individual gas injections, one using pure oxygen and one using pressurized air, the mass transfer of individual gas species between trapped gas phase and groundwater was studied. Field data on the dissolved gas composition in the groundwater were combined with a kinetic model on gas dissolution and transport in porous media. Phase mass transfer of individual gas components caused a temporary enrichment of nitrogen, and to a lower degree of methane, in trapped gas leading to the formation of excess dissolved nitrogen levels downgradient from the dissolving gas phase. By applying a novel gas sampling method for dissolved gases in groundwater it was shown that dissolved nitrogen can be used as a partitioning tracer to indicate complete gas dissolution in porous media.
KW  - Inter-phase mass transfer
KW  - Groundwater
KW  - Remediation
KW  - Gas sparging
KW  - Nitrogen
KW  - Methane
KW  - Kinetics
KW  - Bitterfeld
Y1  - 2011
U6  - https://doi.org/10.1016/j.jconhyd.2011.05.005
SN  - 0169-7722
VL  - 126
IS  - 1-2
SP  - 8
EP  - 18
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schröter, M. -A.
A1  - Meyer, S.
A1  - Hahn, M. B.
A1  - Solomun, T.
A1  - Sturm, H.
A1  - Kunte, H. J.
T1  - Ectoine protects DNA from damage by ionizing radiation
JF  - Scientific reports
N2  - Ectoine plays an important role in protecting biomolecules and entire cells against environmental stressors such as salinity, freezing, drying and high temperatures. Recent studies revealed that ectoine also provides effective protection for human skin cells from damage caused by UV-A radiation. These protective properties make ectoine a valuable compound and it is applied as an active ingredient in numerous pharmaceutical devices and cosmetics. Interestingly, the underlying mechanism resulting in protecting cells from radiation is not yet fully understood. Here we present a study on ectoine and its protective influence on DNA during electron irradiation. Applying gel electrophoresis and atomic force microscopy, we demonstrate for the first time that ectoine prevents DNA strand breaks caused by ionizing electron radiation. The results presented here point to future applications of ectoine for instance in cancer radiation therapy.
Y1  - 2017
U6  - https://doi.org/10.1038/s41598-017-15512-4
SN  - 2045-2322
VL  - 7
PB  - Nature Publ. Group
CY  - London
ER  -