Bisallylic groups
Webbisallylic methylene groups (i.e. methylene groups with two adjacent double bonds) of the hydrocarbon chains by NO2 (reaction 1). The resulting lipid radical rearranges (reaction 2) under transformation of the isolated double bond system into a conjugated one and adds molecular oxygen (reaction 3), yielding a lipid peroxy radical. This compound ... WebFeb 1, 1992 · Thiyl free radicals have been shown to react with polyunsaturated fatty acids via abstraction of bisallylic hydrogen, forming pentadienyl radicals, and via addition to the double bonds. ... RSO2., which not only abstract hydrogen from the bisallylic methylene groups of the PUFAs (although only at relatively small yield) but also readily add to ...
Bisallylic groups
Did you know?
WebSep 1, 2024 · The third group is for cottonseed oil and peanut oil. Trehalose depressed the oxidation of olefinic and bisallylic protons to both oils but did not efficiently depress oxidation of allylic proton. It is well known that the fatty acid composition of the oil used in deep-frying absolutely affected the oxidation stability of the oil. Webmet-c-847: Average number of methylene groups per double bond. met-c-851: Average number of double bonds in a fatty acid chain. met-c-845: Ratio of bisallylic groups to total fatty acids. met-c-848: Average number of methylene groups in a fatty acid chain. met-c-854: Description of average fatty acid chain length, not actual carbon number.
WebOct 2, 2013 · The ratio of bisallylic groups to total fatty acids increased in the fatty fish group. Figure 2 Serum lipid extracts, n-3 fatty acids (A), Docosahexaenoic acid (B), n-3/total fatty acids (C), Average number of double bonds in a fatty acid chain (D), Average fatty acid chain length (E), Ratio of bisallylic groups to total fatty acids (F) at ... WebAug 21, 2014 · Postmenopausal women had less bisallylic groups per double bond than premenopausal women. The lipoprotein subclass concentrations showed a similar trend as among all women; ...
Pancreatitis is a common disease featured by autodigestion of the pancreas (1). Acute pancreatitis can transit into recurrent episodes, and further progress into chronic pancreatitis (1). Several modifiable risk factors, including smoking, alcohol consumption, abdominal adiposity and obesity, gallstone diseases … See more Our comprehensive MR study reveals that elevated triglycerides levels and reduced degree of unsaturation in fatty acids were causally associated with the increased risk of various pancreatitis. Dietary supplementation of … See more This study gave concrete evidence showing the strong causal effects of triglycerides, particularly triglycerides in HDL particles, on the risk of pancreatitis. Moreover, we observed traits related with increased fatty acid … See more WebMar 13, 2024 · bisallylic ( not comparable ) ( organic chemistry) Having two allene groups.
WebThe weak C–H bonds in bisallylic groups in PUFAs thereby act as the first line of defense against thiyl cis–trans cycles in biolipid solutions (±O 2). With the intriguing exception of vitamin E in MUFA, thiyl-active antioxidants inhibit isomerization in much the same way as they protect against peroxidation. Applied to thiol–ene coupling ...
WebThe rates of peroxidation of PUFA occur in proportion to the total number of bisallylic groups available and this has provides a relative scale of peroxidation known as the peroxidation index. Recently, Else PL and Kraffe E (Biochimica and Biophysica Acta, 2015) demonstrated that peroxidation of PUFA with more than one bisallylic group is ... hillsborough county tax folioWebFeb 28, 2024 · The LibreTexts libraries are Powered by NICE CXone Expert and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. We also acknowledge previous National Science … smart home group perthWebApr 15, 2016 · Autoxidation of unsaturated fatty acids occurs via a free radical chain reaction generally involving three main steps: (1) initiation that consists in the abstraction of an hydrogen atom adjacent to a double bond in an unsaturated molecule (allylic and bisallylic group) to produce an alkyl free radical; (2) propagation during which the ... hillsborough county tax property taxWebRates of peroxidation of PCs with multiple bisallylic groups (i.e. 20:4n-6 and 22:6n-3) peroxidized at 2-3 times the rate per bisallylic bond than the same phospholipid with … smart home giveaway hgtvWebOct 1, 2013 · The metabolic clustering of baseline samples revealed 2 distinct baseline metabolic groups of participants. Group B (30 participants) was characterized by higher serum concentrations of apolipoprotein B, a higher ratio of apolipoprotein B to apolipoprotein A-I, higher serum LDL cholesterol, higher triglycerides, lower HDL cholesterol, and … hillsborough county ticket checkWebMay 7, 2010 · The purified enzyme belongs to the group of prokaryotic mini lipoxygenases, because it had a molecular mass of 65 kDa. Interestingly, it catalyzed the conversion of linoleic acid, the only endogenously found polyunsaturated fatty acid, primarily to the bisallylic hydroperoxide 11R-hydroperoxyoctadecadienoic acid. hillsborough county tennis associationWebMeaning of BISALLYLIC. What does BISALLYLIC mean? Information and translations of BISALLYLIC in the most comprehensive dictionary definitions resource on the web. … hillsborough county title company