Carbon isotope fractionation during cis?trans isomerization of unsaturated fatty acids in Pseudomonas putida

2004 ◽  
Vol 66 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Hermann J. Heipieper ◽  
Grit Neumann ◽  
Nadja Kabelitz ◽  
Matthias Kastner ◽  
Hans Hermann Richnow
Keyword(s):  
Fatty Acids ◽  
Pseudomonas Putida ◽  
Carbon Isotope ◽  
Isotope Fractionation ◽  
Unsaturated Fatty Acids ◽  
Carbon Isotope Fractionation ◽  
Trans Isomerization

scholarly journals Mechanism of cis-trans Isomerization of Unsaturated Fatty Acids in Pseudomonas putida

2003 ◽  
Vol 185 (5) ◽  
pp. 1730-1733 ◽  
Author(s):  
Angelika von Wallbrunn ◽  
Hans Hermann Richnow ◽  
Grit Neumann ◽  
Friedhelm Meinhardt ◽  
Hermann J. Heipieper
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Amino Acid ◽  
Double Bond ◽  
Pseudomonas Putida ◽  
Direct Evidence ◽  
Unsaturated Fatty Acids ◽  
Amino Acid Sequences ◽  
Trans Isomerization ◽  
In Cells

ABSTRACT We studied the pattern of the cis-trans isomerization of unsaturated fatty acids in cells of Pseudomonas putida S12 grown in a medium supplemented with oleic acid which was deuterated at both of the C atoms of its double bond. Direct evidence that isomerization does not include a transient saturation of the double bond was obtained. In addition, analysis of the amino acid sequences of the seven known Cti proteins identified them as heme-containing proteins of the cytochrome c type.

scholarly journals Carbon Isotope Fractionation during the Formation of CO2 Hydrate and Equilibrium Pressures of 12CO2 and 13CO2 Hydrates

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4215
Author(s):  
Hiromi Kimura ◽  
Go Fuseya ◽  
Satoshi Takeya ◽  
Akihiro Hachikubo
Keyword(s):  
Carbon Isotope ◽  
Isotope Fractionation ◽  
Small Difference ◽  
Hydrate Formation ◽  
Formation Temperature ◽  
Carbon Isotope Fractionation ◽  
Unit Cell Size ◽  
Naturally Occurring ◽  
Three Phase ◽  
The Difference

Knowledge of carbon isotope fractionation is needed in order to discuss the formation and dissociation of naturally occurring CO2 hydrates. We investigated carbon isotope fractionation during CO2 hydrate formation and measured the three-phase equilibria of 12CO2–H2O and 13CO2–H2O systems. From a crystal structure viewpoint, the difference in the Raman spectra of hydrate-bound 12CO2 and 13CO2 was revealed, although their unit cell size was similar. The δ13C of hydrate-bound CO2 was lower than that of the residual CO2 (1.0–1.5‰) in a formation temperature ranging between 226 K and 278 K. The results show that the small difference between equilibrium pressures of ~0.01 MPa in 12CO2 and 13CO2 hydrates causes carbon isotope fractionation of ~1‰. However, the difference between equilibrium pressures in the 12CO2–H2O and 13CO2–H2O systems was smaller than the standard uncertainties of measurement; more accurate pressure measurement is required for quantitative discussion.

Large-scale carbon isotope fractionation in evaporites and the generation of extremely 13C-enriched methane

Geology ◽  
2004 ◽  
Vol 32 (6) ◽  
pp. 533 ◽  
Author(s):  
Joanna Potter ◽  
Michael G. Siemann ◽  
Mikhail Tsypukov
Keyword(s):  
Carbon Isotope ◽  
Large Scale ◽  
Isotope Fractionation ◽  
Carbon Isotope Fractionation

Carbon Isotope Fractionation in Noelaerhabdaceae Algae in Culture and a Critical Evaluation of the Alkenone Paleobarometer

2021 ◽  
Author(s):  
Samuel R. Phelps ◽  
Gwenn M. M. Hennon ◽  
Sonya T. Dyhrman ◽  
María D. Hernández‐Limón ◽  
Olivia M. Williamson ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Fractionation ◽  
Critical Evaluation ◽  
Carbon Isotope Fractionation

Microbial Dehalogenation of Trichlorinated Dibenzo-p-dioxins by aDehalococcoides-Containing Mixed Culture Is Coupled to Carbon Isotope Fractionation

2007 ◽  
Vol 41 (22) ◽  
pp. 7744-7751 ◽  
Author(s):  
Eva-Maria Ewald ◽  
Anke Wagner ◽  
Ivonne Nijenhuis ◽  
Hans-Hermann Richnow ◽  
Ute Lechner
Keyword(s):  
Mixed Culture ◽  
Carbon Isotope ◽  
Isotope Fractionation ◽  
Carbon Isotope Fractionation
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