The smoke compounds accumulated in
the meat cannot be 100% recovered by
extraction, since many of them interact
chemically with the meat components. The
proteins and lipids of meat contain various
reactive groups, which in appropriate condi-
tions, especially at high temperature, can
react with phenols, carbonyl compounds, and
acids of the smoke. The most reactive are the
– SH, – NH 2 , and – NH – C( = NH)NH 2 groups
of amino acid residues in proteins and of
nonprotein nitrogen compounds, as well as
the polyenoic fatty acids and different reac-
tive oxygen species and oxidation products
like · O 2
− , · OH, RO · , ROO · , and ROOH.
Smoke compounds may react with amino
acids in meat products, leading to a signifi -
cant decrease in the contents of amino
acids in acid hydrolysates (Seuss 1986 ).
Coniferaldehyde and sinapaldehyde present
in the smoke condensates were not recovered
from the smoked meats in the experiments of
Lustre and Issenberg (1970) , possibly due to
their interactions with the meat proteins. A
signifi cant decrease in the contents of smoke
carbonyl compounds caused by reactions
with gelatine was shown by Ziemba (1969) .
High loss of available lysine in sausage
casings due to smoking was found by Ruiter
The smoke compounds accumulated inthe meat cannot be 100% recovered byextraction, since many of them interactchemically with the meat components. Theproteins and lipids of meat contain variousreactive groups, which in appropriate condi-tions, especially at high temperature, canreact with phenols, carbonyl compounds, andacids of the smoke. The most reactive are the– SH, – NH 2 , and – NH – C( = NH)NH 2 groupsof amino acid residues in proteins and ofnonprotein nitrogen compounds, as well asthe polyenoic fatty acids and different reac-tive oxygen species and oxidation productslike · O 2− , · OH, RO · , ROO · , and ROOH.Smoke compounds may react with aminoacids in meat products, leading to a signifi -cant decrease in the contents of aminoacids in acid hydrolysates (Seuss 1986 ).Coniferaldehyde and sinapaldehyde presentin the smoke condensates were not recoveredfrom the smoked meats in the experiments ofLustre and Issenberg (1970) , possibly due totheir interactions with the meat proteins. Asignifi cant decrease in the contents of smokecarbonyl compounds caused by reactionswith gelatine was shown by Ziemba (1969) .High loss of available lysine in sausagecasings due to smoking was found by Ruiter
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