Positional and geometrical isomers of linoleic acid in partially hydrogenated oils

1992 ◽  
Vol 69 (2) ◽  
pp. 95-105 ◽  
Author(s):  
W. M. N. Ratnayake ◽  
G. Pelletier
Keyword(s):  
Linoleic Acid ◽  
Geometrical Isomers ◽  
Hydrogenated Oils ◽  
Partially Hydrogenated Oils

Regulatory Changes Affecting the Production and Use of Fats and Oils: Focus on Partially Hydrogenated Oils

2020 ◽  
Vol 97 (8) ◽  
pp. 797-815 ◽  
Author(s):  
Sneh D. Bhandari ◽  
Pierluigi Delmonte ◽  
Mical Honigfort ◽  
William Yan ◽  
Fabiola Dionisi ◽  
...  
Keyword(s):  
Fats And Oils ◽  
Regulatory Changes ◽  
Hydrogenated Oils ◽  
Partially Hydrogenated Oils

scholarly journals Potential Health Benefits of Conjugated Linoleic Acid: An Important Functional Dairy Ingredient

2020 ◽  
pp. 200-213 ◽  
Author(s):  
Chaudhari Kalpeshkumar Virsangbhai ◽  
Ankit Goyal ◽  
Beenu Tanwar ◽  
Manvesh Kumar Sihag
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Active Form ◽  
Positive Association ◽  
Epidemiological Studies ◽  
Dietary Fatty Acids ◽  
Biologically Active ◽  
Geometrical Isomers ◽  
Potential Health

Conjugated linoleic acid (CLA) refers to a class of positional and geometrical isomers of linoleic acid (cis-9, cis-12 octadecadienoic acid) having conjugate double bond system. CLA are synthesized in rumen of the ruminants by biohydrogenation of dietary fatty acids; and thus, can be obtained from dairy products as well as from the meat of sheep, lamb and other ruminants. Among the several isomers, c9, t11-CLA isomer is the most biologically active form and accounts approximately 80% of total isomers. A number of clinical and epidemiological studies have demonstrated the role of CLA as anti-atherogenic, anti-inflammatory, anti-oxidative, anti-carcinogenic, etc. Several researchers have suggested the positive association of CLA in weight management, hypercholesterolemia, immunomodulatory functions, and improved bone metabolism.

scholarly journals Impacts analysis regarding partially hydrogenated oils

2015 ◽  
Author(s):  
Ellen D. Smith ◽  
Anthony F. Turhollow, Jr. ◽  
Gregory P.. Zimmerman ◽  
Laurence M Eaton ◽  
Cheryl B. Bast
Keyword(s):  
Hydrogenated Oils ◽  
Partially Hydrogenated Oils

Benzophenone-photosensitized autoxidation of linoleate in solution and sodium dodecyl sulfate micelles

1987 ◽  
Vol 65 (11) ◽  
pp. 2529-2540 ◽  
Author(s):  
Lawrence Ross Coates Barclay ◽  
Kimberly Ann Baskin ◽  
Steven Jeffrey Locke ◽  
Tanya Diane Schaefer
Keyword(s):  
Linoleic Acid ◽  
Rate Constants ◽  
Sodium Dodecyl ◽  
Kinetic Studies ◽  
Water Soluble ◽  
Peroxyl Radicals ◽  
Phenolic Antioxidants ◽  
Radical Chain ◽  
Geometrical Isomers ◽  
Chain Reactions

Diffusion studies show that benzophenone (BP), linoleic acid, and methyl linoleate partition completely into the micelles of phosphate buffer/0.10 M SDS. Water-soluble compounds 4-sulphomethylbenzophenone, sodium salt (BP−), azobis(2-amidinopropane•HCl) (ABAP) and 2,5,7,8-tetramethyl-6-hydroxychroman-2-carboxylate (Trolox) show partial partitioning into the micelles. BP- and BP−-photosensitized oxidation of linoleic acid in 0.50 M SDS exhibited characteristics of free radical chain reactions including: (1) inhibition by phenolic antioxidants, (2) no retardation by singlet oxygen quenchers, and (3) the formation of conjugated hydroperoxides with cis,trans to trans,trans ratios of geometrical isomers typical of autoxidation. Quantitative kinetic studies of the order in substrate, RH, and the rate of chain initiation, Ri, show that the classical rate law, −d[O2]/dt = kp/2kt1/2[RH]Ri1/2 applies to BP-photoinitiated autoxidation of linoleic acid in SDS and the oxidizability (kp/2kt1/2 = 4.42 × 10−2 M−1/2 s−1/2) is the same as that found with a thermal initiator. The rotating sector method gave absolute rate constants for linoleic acid autoxidation in 0.50 M SDS for propagation (kp = 36.2 M−1 s−1) and termination (2kt = 3.52 × 105 M−1 s−1), significantly lower than values in polar organic solvents; attributed to solvation of polar peroxyls in aqueous SDS. Depressed inhibition rate constants (kinh) for α-tocopherol, Trolox, and pentamefhylhydroxychroman (PMHC) in 0.50 M SDS compared to kinh in tert-butyl alcohol are attributed to hydrogen bonding effects on the peroxyl radicals and on the inhibitors.

Partially Hydrogenated Oils Are Out

JAMA ◽  
2015 ◽  
Vol 314 (5) ◽  
pp. 443
Author(s):  
Rebecca Voelker
Keyword(s):  
Hydrogenated Oils ◽  
Partially Hydrogenated Oils
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