Carbon isotopic fractionation in the biosynthesis of bacterial fatty acids. Ozonolysis of unsaturated fatty acids as a means of determining the intramolecular distribution of carbon isotopes

1982 ◽  
Vol 46 (2) ◽  
pp. 139-149 ◽  
Author(s):  
K.David Monson ◽  
J.M Hayes
Keyword(s):  
Fatty Acids ◽  
Carbon Isotopes ◽  
Unsaturated Fatty Acids ◽  
Isotopic Fractionation ◽  
Carbon Isotopic ◽  
Carbon Isotopic Fractionation

scholarly journals Evaluating Dissolved Inorganic Carbon Cycling in a Forested Lake Watershed Using Carbon Isotopes

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 636-645 ◽  
Author(s):  
Ramon Aravena ◽  
S. L. Schiff ◽  
S. E. Trumbore ◽  
P. J. Dillon ◽  
Richard Elgood
Keyword(s):  
Isotopic Composition ◽  
Carbon Isotopes ◽  
Inorganic Carbon ◽  
Dissolved Inorganic Carbon ◽  
Carbon Isotopic Composition ◽  
Isotopic Fractionation ◽  
Early Spring ◽  
Late Winter ◽  
Isotope Pattern ◽  
Carbon Isotopic

Dissolved inorganic carbon (DIC) is the main acid buffer in forested lake watersheds in Canada. We used carbon isotopes (13C, 14C) to evaluate the production and cycling of DIC in an acid-sensitive lake watershed of the Precambrian Shield. Soil CO2, groundwater and stream DIC were characterized chemically and isotopically. Soil CO2 concentration profiles reflect both changes in production and in losses due to diffusion. δ13C soil CO2 profiles (δ13C values of −23‰ in summer, slightly enriched during the fall and −25%‰ during the winter) are a reflection of the isotopic composition of the sources and changes in isotopic fractionation due to diffusion. Carbon isotopic composition (13C, 14C) of the groundwater and stream DIC clearly indicate that weathering of silicates by soil CO2 is the main source of DIC in these watersheds. 14C data show that, in addition to recent groundwater, an older groundwater component with depleted 14C activity is also present in the bedrock. The carbon isotope pattern in the groundwater also implies that, besides the main springtime recharge events, contributions to the groundwater may also occur during late winter/early spring.

Carbon isotopic fractionation associated with lipid biosynthesis by a cyanobacterium: Relevance for interpretation of biomarker records

1997 ◽  
Vol 61 (24) ◽  
pp. 5379-5389 ◽  
Author(s):  
Susumu Sakata ◽  
John M. Hayes ◽  
Andrew R. McTaggart ◽  
Ronald A. Evans ◽  
Kristen J. Leckrone ◽  
...  
Keyword(s):  
Isotopic Fractionation ◽  
Lipid Biosynthesis ◽  
Carbon Isotopic ◽  
Carbon Isotopic Fractionation

Carbon Isotopic Fractionation of CFCs during Abiotic and Biotic Degradation

2012 ◽  
Vol 46 (3) ◽  
pp. 1764-1773 ◽  
Author(s):  
Marie E. Archbold ◽  
Trevor Elliot ◽  
Robert M. Kalin
Keyword(s):  
Isotopic Fractionation ◽  
Carbon Isotopic ◽  
Biotic Degradation ◽  
Carbon Isotopic Fractionation

Drivers of carbon isotopic fractionation in a coral reef lagoon: Predominance of demand over supply

2015 ◽  
Vol 153 ◽  
pp. 105-115 ◽  
Author(s):  
Matheus C. Carvalho ◽  
Isaac R. Santos ◽  
Damien T. Maher ◽  
Tyler Cyronak ◽  
Ashly McMahon ◽  
...  
Keyword(s):  
Coral Reef ◽  
Isotopic Fractionation ◽  
Reef Lagoon ◽  
Carbon Isotopic ◽  
Coral Reef Lagoon ◽  
Carbon Isotopic Fractionation
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