Relation between the equilibrium stable isotope fractionation and the second order Doppler shift in Mössbauer spectra

1998 ◽  
Vol 43 (S1) ◽  
pp. 103-103
Author(s):  
V. B. Polyakov
Keyword(s):  
Stable Isotope ◽  
Doppler Shift ◽  
Isotope Fractionation ◽  
Mössbauer Spectra ◽  
Second Order ◽  
Mossbauer Spectra ◽  
Stable Isotope Fractionation ◽  
Second Order Doppler Shift

Second‐order Doppler shift in Mössbauer spectra of Fe‐B and Fe‐P amorphous alloys

1988 ◽  
Vol 64 (6) ◽  
pp. 3299-3301 ◽  
Author(s):  
Katsuhisa Tanaka ◽  
Kazuyuki Hirao ◽  
Naohiro Soga
Keyword(s):  
Doppler Shift ◽  
Amorphous Alloys ◽  
Mössbauer Spectra ◽  
Second Order ◽  
Mossbauer Spectra ◽  
Second Order Doppler Shift

scholarly journals Unravelling the process of petroleum hydrocarbon biodegradation in different filter materials of constructed wetlands by stable isotope fractionation and labelling studies

2021 ◽  
Author(s):  
Andrea Watzinger ◽  
Melanie Hager ◽  
Thomas Reichenauer ◽  
Gerhard Soja ◽  
Paul Kinner
Keyword(s):  
Stable Isotope ◽  
Constructed Wetlands ◽  
Hydrogen Isotope ◽  
Petroleum Hydrocarbon ◽  
Isotope Fractionation ◽  
Isotope Effects ◽  
Filter Material ◽  
Hydrocarbon Biodegradation ◽  
Stable Isotope Fractionation ◽  
Filter Materials

AbstractMaintaining and supporting complete biodegradation during remediation of petroleum hydrocarbon contaminated groundwater in constructed wetlands is vital for the final destruction and removal of contaminants. We aimed to compare and gain insight into biodegradation and explore possible limitations in different filter materials (sand, sand amended with biochar, expanded clay). These filters were collected from constructed wetlands after two years of operation and batch experiments were conducted using two stable isotope techniques; (i) carbon isotope labelling of hexadecane and (ii) hydrogen isotope fractionation of decane. Both hydrocarbon compounds hexadecane and decane were biodegraded. The mineralization rate of hexadecane was higher in the sandy filter material (3.6 µg CO2 g−1 day−1) than in the expanded clay (1.0 µg CO2 g−1 day−1). The microbial community of the constructed wetland microcosms was dominated by Gram negative bacteria and fungi and was specific for the different filter materials while hexadecane was primarily anabolized by bacteria. Adsorption / desorption of petroleum hydrocarbons in expanded clay was observed, which might not hinder but delay biodegradation. Very few cases of hydrogen isotope fractionation were recorded in expanded clay and sand & biochar filters during decane biodegradation. In sand filters, decane was biodegraded more slowly and hydrogen isotope fractionation was visible. Still, the range of observed apparent kinetic hydrogen isotope effects (AKIEH = 1.072–1.500) and apparent decane biodegradation rates (k = − 0.017 to − 0.067 day−1) of the sand filter were low. To conclude, low biodegradation rates, small hydrogen isotope fractionation, zero order mineralization kinetics and lack of microbial biomass growth indicated that mass transfer controlled biodegradation.

Effects of food quality, starvation and life stage on stable isotope fractionation in Collembola

Pedobiologia ◽  
2005 ◽  
Vol 49 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Dominique Haubert ◽  
Reinhard Langel ◽  
Stefan Scheu ◽  
Liliane Ruess
Keyword(s):  
Stable Isotope ◽  
Food Quality ◽  
Isotope Fractionation ◽  
Life Stage ◽  
Stable Isotope Fractionation

Magnesium stable isotope fractionation in marine biogenic calcite and aragonite

2011 ◽  
Vol 75 (19) ◽  
pp. 5797-5818 ◽  
Author(s):  
F. Wombacher ◽  
A. Eisenhauer ◽  
F. Böhm ◽  
N. Gussone ◽  
M. Regenberg ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Fractionation ◽  
Stable Isotope Fractionation

Compound-Specific Stable Isotope Fractionation of Pesticides and Pharmaceuticals in a Mesoscale Aquifer Model

2016 ◽  
Vol 50 (11) ◽  
pp. 5729-5739 ◽  
Author(s):  
Heide K. V. Schürner ◽  
Michael P. Maier ◽  
Dominik Eckert ◽  
Ramona Brejcha ◽  
Claudia-Constanze Neumann ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Fractionation ◽  
Stable Isotope Fractionation

Linear ion trap for second order Doppler shift reduction in frequency standard applications

2003 ◽  
Author(s):  
J.D. Prestage ◽  
G.R. Janik ◽  
G.J. Dick ◽  
T.K. Tucker ◽  
L. Maleki
Keyword(s):  
Doppler Shift ◽  
Ion Trap ◽  
Frequency Standard ◽  
Second Order ◽  
Linear Ion Trap ◽  
Second Order Doppler Shift

Effect of Anharmonicity on the Second-Order Doppler Shift for a Vacancy-Trapped Mossbauer Impurity Atom in Metallic Solid Solution

1981 ◽  
Vol 108 (1) ◽  
pp. 211-220 ◽  
Author(s):  
P. K. Acharyya ◽  
A. K. Tewari ◽  
S. K. Roy ◽  
D. L. Bhattacharya
Keyword(s):  
Solid Solution ◽  
Impurity Atom ◽  
Doppler Shift ◽  
Second Order ◽  
Second Order Doppler Shift
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