As shown in Figure 4, at the beginning of this process, the propanal
contents of the three kinds of microcapsules were all close to 11 mg/kg.
Ozone concentrations did not significantly affect TBARs, but did influence headspace propanal
. The 1.0-ppm ozone treatments yielded approximately 30% higher propanal
values than did the 1.5-ppm treatments.
For instance, adding two hydrogen atoms to a molecule of propenal yields propanal
, and both molecules serve as intermediates in the formation of larger and more-complex compounds.--A.G.
In contrast, propanal
, pentanal, hexanal, heptanal, and octanal contents were highest (p<0.05) in AN, and similar between KC and HO.
The investigators found that pea dextrin efficiently masks propanal
, 1-penten-3-one, hexanal and (E,E)-2,4-heptadienal.
Among the many different aldehydes which can be formed as secondary products during lipid peroxidation, malondialdehyde (MDA), propanal
, hexanal, and 4-hydroxynonenal (4HNE) have been extensively studied by Esterbauer and his colleagues in the 80s [38-49].
from the 2- and 3-methylbutanols, butan-2,3-dione and 3-methylthio propanal
Aminomethyl propanol 1.125 Luviflex Soft (BASF) 10.00 (acrylates copolymer) Uvinul MS 40 (BASF) 0.80 (benzophenone-4) Cremophor C040 (BASF) 0.20 (hydrogenated castor oil) Fragrance 0.05 Preservative 0.50 PROCEDURE: Dissolve aminomethyl propanal
in water; add Uvinul MS 40.
Iqbal, "Cobalt(II) porphyrin: a versatile catalyst for the oxidation of organic substrates with dioxygen and 2-methyl propanal
," Tetrahedron Letters, vol.
The powder stability against oxidation was examined by measuring peroxide values (PVs) and headspace propanal
after storing the samples at room temperature and at 3 C to 4 C for six weeks.
Aldehydes derived from lipid oxidation (propanal
, butanal, pentanal, hexanal, heptanal, octanal, and nonanal) and pyrazine (2-methyl and 2,5-dimethylpyrazine) were found to be predominant in this study.