Document Detail

Determination of 13C/12C-ratios in rumen produced methane and CO2 of cows, sheep and camels.
MedLine Citation:
PMID:  9854843     Owner:  NLM     Status:  MEDLINE    
Naturally produced methane shows different delta 13C-values with respect to its origin, e.g., geological or biological. Methane-production of ruminants is considered to be the dominant source from the animal kingdom. Isotopic values of rumen methane--given in literature--range between -80/1000 and -50/1000 and are related to feed composition and also sampling techniques. Keeping cows, camels and sheep under identical feed conditions and sampling rumen gases via implanted fistuale we compared delta PDB 13C-values of methane and CO2 between the species. Referring to mean values obtained from 4 or 5 samples at different times of 11 animals (n = 47) we calculated delta PDB 13C-medians resulting in small but not significant differences within and significant differences between the species for CO2 and methane. The delta PDB 13C-differences between methane and CO2 were statistically equal within and also between the species. Therefore a linear regression of methane values on CO2 is appropriate and leads to: delta PDB 13C(methane)/1000 = 1.57 * delta PDB 13C(CO2)/1000 - 47/1000 with a correlation coefficient of r = 0.87.
E Schulze; S Lohmeyer; W Giese
Related Documents :
3783193 - A gas mixer for computer calibration of an anesthetic mass spectrometer.
23514763 - Family income and education were related with 30-year time trends in dietary and meal b...
21767463 - Genetic variation of dietary restriction and the effects of nutrient-free water and ami...
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Isotopes in environmental and health studies     Volume:  34     ISSN:  1025-6016     ISO Abbreviation:  Isotopes Environ Health Stud     Publication Date:  1998  
Date Detail:
Created Date:  1999-01-28     Completed Date:  1999-01-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9602611     Medline TA:  Isotopes Environ Health Stud     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  75-9     Citation Subset:  IM    
Fachgebiet Medizinische Physik der Tierärztlichen Hochschule Hannover, Deutschland.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Carbon / analysis
Carbon Dioxide / chemistry,  metabolism*
Carbon Isotopes
Methane / chemistry,  metabolism*
Rumen / metabolism*
Species Specificity
Reg. No./Substance:
0/Carbon Isotopes; 124-38-9/Carbon Dioxide; 74-82-8/Methane; 7440-44-0/Carbon

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Mechanism from isotope effects.
Next Document:  Wild rabbit host and some parasites show trophic-level relationships for delta 13C and delta 15N: a ...