2 research outputs found
Localization of formaldehyde production during frozen storage of European hake ( Merluccius merluccius )
5 páginas, 3 tablas, 2 figurasThe formation of dimethylamine and formaldehyde
from trimethylamine N-oxide by the enzyme
trimethylamine N-oxide demethylase in whole hake during
frozen storage was studied. The objective was to
check if there were parts of the muscle with a higher production
of dimethylamine and formaldehyde, and if the
presence of kidney during frozen storage had any significant
influence on the production. Three variables were
examined through one year storage. The first was anatomical
location, considering the red muscle and three
zones of white muscle, one located right over the kidneys,
the dorsal part over the viscera, and the tail. The
second variable was the temperature of storage, –11 °C
or –18 °C. Finally, the influence of kidneys during storage,
comparing fish with and without kidneys, was also
evaluated.
No differences were found in dimethylamine and
formaldehyde production between fish with and without
kidneys stored at –18 °C. However at –11 °C the
amounts of dimethylamine and formaldehyde detected in
fish without kidneys were, in some cases, higher than in
those with kidneys. Kidney removal does not have a statistically
significant influence on DMA and FA production
in frozen storage hake. Differences in dimethylamine
and formaldehyde values among different anatomical
locations were found, especially in those stored over
one year. It was found that, in general, the white muscle
located right over the kidneys produced more dimethylamine
than other parts of the fish.The authors wish to thank the European Commission for financial support of the Research
Projects FAIR-CT95-1111 and AIR 3-CT94-1921.Peer reviewe