Results 21 to 30 of about 47,790 (162)

Isolation analysis of tissue fatty acids by ultramicro-ozonolysis in conjunction with thin-layer chromatography and gas-liquid chromatography

open access: yesJournal of Lipid Research, 1963
Apparatus and technique for the detailed analysis of natural mixtures of fatty acids by a combination of thin-layer chromatography (TLC), gas-liquid chromatography (GLC), and reductive ozonolysis are described.The fatty acids, as methyl esters, are ...
O.S. Privett, M.L. Blank, O. Romanus
doaj   +1 more source

6-Acyl galactosyl ceramides of pig brain: structure and fatty acid composition

open access: yesJournal of Lipid Research, 1968
Two glycolipids were isolated from pig brain and were shown to be the fatty acid esters of kerasin and cerebron in which the second fatty acid moiety is attached to the 6-position of the galactose.
Yasuo Kishimoto   +2 more
doaj   +1 more source

Bench Scale Production of Vitamin E from Crude Palm Oil

open access: yesChemical Engineering Transactions, 2021
Vitamin E (VitE) from palm oil is usually separated from palm fatty acid distillate. VitE separation from crude palm oil (CPO) has been rarely reported.
Amnart Soontornchatchawate   +2 more
doaj   +1 more source

不饱和脂肪酸甲酯分子修饰及其润滑性能研究进展Research progress on molecular modification of unsaturated fatty acid methyl esters and their lubricating performance

open access: yesZhongguo youzhi
旨在为新型润滑油基础油及润滑添加剂的开发提供借鉴,总结了不饱和脂肪酸甲酯的润滑性能、不饱和脂肪酸甲酯的分子修饰工艺及其润滑性能,以及不饱和脂肪酸甲酯分子修饰产物环氧脂肪酸甲酯的进一步分子修饰及其润滑性能,并对新型润滑剂的开发方向进行了展望。不饱和脂肪酸甲酯的润滑性能与其分子中碳碳双键数目有关,碳碳双键数目的增多有利于提高其润滑性能。不饱和脂肪酸甲酯的分子修饰主要有氢甲酰化、支链化和环氧化,而环氧脂肪酸甲酯的进一步分子修饰包括其与脂肪醇、脂肪酸及酸酐的进一步反应 ...
夏鑫,蔺建民,李妍,杨鹤XIA Xin, LIN Jianmin, LI Yan, YANG He
doaj   +1 more source

Transesterification of phospholipids or triglycerides to fatty acid benzyl esters with simultaneous methylation of free fatty acids for gas-liquid chromatographic analysis.

open access: yesJournal of Lipid Research, 1988
A novel method is presented for transesterification of fatty acid esters in phospholipids and triglycerides to benzyl esters while simultaneously recovering free fatty acids as methyl esters.
F J van Kuijk   +3 more
doaj   +1 more source

Research on lubrication properties of selected raw plant and animal materials

open access: yesTransport, 2020
The article presents the results of research on lubrication properties of rapeseed oil, methyl esters of rapeseed oil, as well as esters with goose fat.
Leszek Gardyński, Jolanta Kałdonek
doaj   +1 more source

Hydroboration of Methyl Esters of Fatty Acids

open access: yesEuropean Scientific Journal, ESJ, 2017
Hydroboration addition reactions of a boron atom, and hydrogen over unsaturated, have been widely studied. They have excellent access routes to organoborans which have proven to be a very useful synthetic intermediate (Brown et al.; Matteson, 1987; Smith, 1994). The bill might be on one or other of the two carbons of the unsaturation. It is carried out
Ali Mcheik   +3 more
openaire   +2 more sources

Rapid NIR determination of alkyl esters in virgin olive oil

open access: yesGrasas y Aceites, 2017
The regulation of The European Union for olive oil and olive pomace established the limit of 35 mg·kg-1 for fatty acids ethyl ester contents in extra virgin olive oils, from grinding seasons after 2016.
J. A. Cayuela
doaj   +1 more source

Harmonization of Biodiesel Composition via Competitive Interesterification – Transesterification

open access: yesChemical Engineering Transactions, 2020
A pure interesterification reaction of triglyceride with methyl acetate in the presence of potassium tert-butoxide homogeneous catalyst produces a reaction mixture containing 72.5 wt.% of fatty acid methyl esters (FAME) and 14 wt.% of triacetin. In order
Valdis Kampars   +3 more
doaj   +1 more source

Fatty acid methyl esters yield and phorbol esters degradation during transesterification of Jatropha curcas oil by alkaline, acid and enzyme catalyzed method

open access: yesRenewable Energy and Environmental Sustainability, 2017
Jatropha curcas has recently been the focus of intense research as a raw material of biomass fuel. However, the carcinogenesis promoter action of the phorbol esters in the Jatropha raises concerns for health and environmental risk.
Tosa Koji, Ishizuka Tomoki
doaj   +1 more source

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