ISSN:
1432-1793
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Absorption of volatile fatty acids (propionate, acetate, butyrate, and formiate) from the ambient water by the lugwormarenicola marina was demonstrated using14C-labelled compounds and by gas-liquid chromatography. Uptake was investigated in the presence of antibiotics. The rate of uptake was highest with propionate (vmax 0,58 μmol g-1 w wt · h, Kt 0.75 μmol l-1). Butyrate, acetate, and formiate were absorbed at lower rates in that order. Absorption of propionate, butyrate, and acetate showed saturation kinetics. In the presence of butyrate and acetate, propionate absorption was inhibited (maximum inhibition 78%). These results indicate that a carrier is involved in the absorption of propionate. Following absorption, the volatile fatty acids were rapidly metabolized. The largest proportion of label was incorporated into amino acids, with the pattern of distribution of radioactivity being specific for each volatile fatty acid.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02180179
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