Effect of temperature on linolenic acid loss and 18:3 Δ9-cis, Δ12-cis, Δ15-trans formation in soybean oil

1993 ◽  
Vol 70 (9) ◽  
pp. 915-917 ◽  
Author(s):  
Sean F. O’Keefe ◽  
V. A. Wiley ◽  
D. Wright
Keyword(s):  
Soybean Oil ◽  
Linolenic Acid ◽  
Effect Of Temperature

scholarly journals Formation of conjugated double bonds in soybean oil with iodine as a catalyst

2016 ◽  
Vol 81 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Jie Yan ◽  
Jinlan Yang ◽  
Rifu Yang ◽  
Haifen He ◽  
Qihai Liu ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Reaction Time ◽  
Soybean Oil ◽  
Linolenic Acid ◽  
Conversion Rate ◽  
Raw Material ◽  
Catalyst Loading ◽  
Optimal Conditions ◽  
Trans Isomers ◽  
High Conversion Rate

A method for the iodine-catalyzed conjugation of soybean oil was developed, and the conjugated product was analyzed by UV, IR, and 1H NMR. The results indicated that the optimal conditions for conjugation included a temperature of 180?C, a catalyst loading of 0.5 wt.% and a reaction time of 3 h, at which the concentration of conjugated linoleic acid was 1.51 mol L-1, with 92 % conversion, the CLNA reached 0.225 mol L-1 when the temperature was 130?C, a catalyst loading of 0.5 wt.%, and a reaction time of 3 h with a conversion rate of 99.9 %. The reaction predominantly produced trans-trans, trans-cis and cis-trans isomers. It was also revealed that the conjugation of linolenic acid was much faster than that of linoleic acid. The method possessed the advantages of a short procedure, a high conversion rate, and no methyl esterification of the raw material, and it was an environmentally friendly technology that does not use solvents.

Milk production and milk composition of dairy cows fed Lac100® or whole flaxseed

2005 ◽  
Vol 85 (3) ◽  
pp. 413-416 ◽  
Author(s):  
F. B. Cavalieri ◽  
G. T. Santos ◽  
M. Matsushita ◽  
H. V. Petit ◽  
L. P. Rigolon ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Linoleic Acid ◽  
Soybean Oil ◽  
Dairy Cows ◽  
Key Words ◽  
Linolenic Acid ◽  
Milk Production ◽  
Milk Composition ◽  
Alpha Linolenic Acid ◽  
Calcium Salts

Cows were fed whole flaxseed or calcium salts of soybean oil as a fat source. Cows fed flaxseed had lower (P < 0.01) milk yield and higher (P < 0.01) percentages of fat and protein than cows fed calcium salts. Feeding whole flaxseed and calcium salts of soybean oil increased, respectively, the concentrations of alpha-linolenic acid and conjugated linoleic acid in milk. Key words: Flaxseed, fatty acids, fat supplement

Effect of Dietary Replacement of Soybean Oil with Different Sources of Gamma-Linolenic Acid on Fatty Acid Composition of Nile Tilapia

2014 ◽  
Vol 92 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Vanessa Vivian Almeida Schneider ◽  
Fabiana Carbonera ◽  
Ana Paula Lopes ◽  
Oscar Oliveira Santos ◽  
Cláudio Celestino Oliveira ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Soybean Oil ◽  
Linolenic Acid ◽  
Acid Composition ◽  
Nile Tilapia ◽  
Gamma Linolenic Acid ◽  
Different Sources

Optimisation of Bleaching Conditions for Soybean Oil Using Response Surface Methodology

2005 ◽  
Vol 11 (6) ◽  
pp. 443-449 ◽  
Author(s):  
J. Ortega-García ◽  
L. A. Medina-Juárez ◽  
N. Gámez-Meza ◽  
J. A. Noriega-Rodriguez
Keyword(s):  
Response Surface Methodology ◽  
Soybean Oil ◽  
Response Surface ◽  
Contact Time ◽  
Tocopherol Content ◽  
Refining Process ◽  
Edible Oil ◽  
Effect Of Temperature ◽  
Partial Vacuum

The refining process applied to soybean oil (SBO) in order to obtain the desirable purity characteristics as edible oil, produces chemical changes by partially removing desirable components such as tocopherols. In this study, the effect of temperature (76.4-143.6°C), contact time (6.4-73.6min) and clay amount (0.16-1.84% w/w) on tocopherol content and quality of SBO were evaluated. Neutralised soybean oil was subjected to bleaching using different clay amounts (Tonsil Optimum 320 FF), stirring (250rpm), and partial vacuum (60mmHg). A response surface methodology (RSM) was used to find the parameters that produce bleached oil with minimum peroxide value (PV), maximum tocopherol retention (TOCR) and light colour. The optimal bleaching conditions for SBO were: temperature, 96°C; time, 23min; clay amount, 1.4% w/w oil. Under these conditions, a bleached soybean oil with 0.1meq/kg of PV, 91.74% of TOCR, and colour 1.53 Lovibond red value units was obtained.

Effect of Substitution of High Stearic Low Linolenic Acid Soybean Oil for Hydrogenated Soybean Oil on Fatty Acid Intake

Lipids ◽  
2008 ◽  
Vol 43 (5) ◽  
pp. 451-456 ◽  
Author(s):  
Maureen A. DiRienzo ◽  
Shawna L. Lemke ◽  
Barbara J. Petersen ◽  
Kim M. Smith
Keyword(s):  
Fatty Acid ◽  
Soybean Oil ◽  
Linolenic Acid ◽  
Fatty Acid Intake ◽  
Acid Intake ◽  
Low Linolenic Acid ◽  
Low Linolenic ◽  
Hydrogenated Soybean Oil
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