In contrast, propanal, pentanal, hexanal, heptanal
, and octanal contents were highest (p<0.05) in AN, and similar between KC and HO.
Pollutant category Pollutants Inert (nonaromatic, Cyclopentane, methylcyclopentane, nonalkane) methylcyclohexane, sulfur, EC, CO, N[O.sub.2] Polar (nonaldehyde) Acetic acid, 2-butanone, organic carbon Aromatic Benzene, toluene, ethylbenzene, m-xylene and p-xylene, o-xylene, n-propylbenzene, p-ethyltoluene, m-ethyltoluene, 1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene and sec-butylbenzene Aldehyde Benzaldehyde, heptanal
, hexanal, octanal Alkane 2,2,4-Trimethylpentane, 2,2-dimethylbutane, 2,3,4-trimethylpentane, 2,3-dimethylbutane.
(a) Volatiles n Average Variance SD CV (%) Hexanal 5 26 8.3 2.9 11 Heptanal
5 1.9 0.045 0.21 11 [alpha]-Pinene 5 2.1 0.13 0.37 17 3-Carene 5 0.76 0.021 0.15 19 Terpene sum 5 2.9 0.26 0.51 17 (a) Results are expressed as mg/kg ODW.
"Our goal was to use frying oil for our Pork Scratchings Snacks product line for a longer time, without adding any synthetic preservers, and while preventing rancidity and oxidation." Frying oils are highly susceptible to oxidation and rancidity, which results in the development of unwanted free fatty acids and aldehydes (such as heptanal
, hexanal, acrolein) plus other unwanted compounds that can be harmful to human health and unacceptable for prolonged use in frying cycles.
All of the volatile hips oil compositions for these species were dominated by following components: vitispiran (isomer), [alpha]-E-acaridial, dodecanoic acid, hexadecanoic acid, docosane (C22), _-ionone, 6-methyl-5-hepten-2-one, 2-heptanone, heptanal
, myristic acid and linolic acid.
Sampling 1 Sampling 2 (E)-2-nonenal (7) 140 X X (E)-2-octenal (7) 126 X X (E,E)-2,4-nonadienal 138 X X (1,6,7) (E,E)-2,4-decadienal (7) 152 X X 3,7-dimethyl-2,6- 152 X X octadienal (1) 6,10-dimethyl-5,9- 194 X X undecadien-2-one (1) Benzaldehyde (1,6) 106 X X Benzyl alcohol (1,4) 108 X X Cyclotetradecane (1) 196 X Dodecanoic acid (1,3,5,6) 200 X X Heptadecane (1,2) 240 X X Heptanal
(1,5,6) 114 X X Hexanal (5,7) 100 X Nonanoic acid (1,3,4,8) 158 X Octadecane (1) 254 X X Toluene (1,6) 92 X X Undecanal (5) 170 X X (1.) Previously reported as a component in human skin emanation (Bernier et al.
Some aliphatic oxygenated compounds (heptanal
, decanal, 2-decanol, ethyl decanoate, palmitic acid, but also 1,8-cineole, myrtenal, 1-p-menthen-9-al, and perillaldehyde), not found in leaves, were identified in small quantities in buds and in the highest quantities in blackcurrant berries.
The researchers also confirmed that the rat receptor studied by Firestein's group responds to the meaty smelling octanal, but they found that the mouse version of the same receptor recognized heptanal
, an herbal odor, instead.
"No carryover peaks were detected in milk samples--even when injecting the SPME fiber immediately after it was used to analyze a milk sample spiked with a 500 ng/mL mixture of aldehydes [butanal, isopentanal, pentanal, hexanal, heptanal
, and octanal]," Marsili continues.
These bad-smelling compounds were heptanal
, octanal, nonanal of aldehydes, and five ketones: 3,3-dimethylcyclobutanone ([C.sub.6]-ketone), methyl isobutyl ketone (MIK), 3, 4-dimethyl-2-hexanone ([C.sub.8]-ketone) and isopropylcyclohexanone and 4,6-dimethyl-5-hepten-2-one ([C.sub.9]ketones).
Chikso beef released more toluene, heptanal
, octanal and nonanal than Hanwoo beef.