GC-MS characterization (Chemical lonization and electron impact modes) of the methyl esters and oxazoline derivatives of cyclopropenoid fatty acids

1991 ◽  
Vol 68 (12) ◽  
pp. 963-969 ◽  
Author(s):  
Volker Spitzer
Keyword(s):  
Fatty Acids ◽  
Electron Impact ◽  
Methyl Esters ◽  
Cyclopropenoid Fatty Acids ◽  
Derivatives Of ◽  
Oxazoline Derivatives

scholarly journals Gas chromatographic characterization of mycobacteria: analysis of fatty acids and trifluoroacetylated whole-cell methanolysates

1976 ◽  
Vol 3 (2) ◽  
pp. 81-85
Author(s):  
L Larsson ◽  
P A Mårdh
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Methyl Esters ◽  
Gas Liquid Chromatography ◽  
Whole Cell ◽  
Chromatographic Characterization ◽  
Different Strains ◽  
Derivatives Of ◽  
Potential Tool

Mycobacterium avium, M. bovis strain Bacillus Calmette-Guerin (BCG), M. kansasii, and M. tuberculosis were studied by gas-liquid chromatography. Methylated fatty acids of the mycobacterial lipids and trifluoroacetyl (TFA) derivatives of whole-cell methanolysates were analyzed. Both the fatty acid and the TFA chromatograms showed reproducible differences between the various mycobacteria studied. Chromatograms from different strains of one and the same species showed negligible differences. Fatty acid methyl esters and TFA methyl glycosides are probably the main constituents of the TFA chromatograms. TFA derivatives are easily prepared and the method provides a potential tool for species indentification of mycobacteria.

scholarly journals High Epoxidation Yields of Vegetable Oil Hydrolyzates and Methyl Esters by Selected Fungal Peroxygenases

2021 ◽  
Vol 8 ◽  
Author(s):  
Alejandro González-Benjumea ◽  
Gisela Marques ◽  
Owik M. Herold-Majumdar ◽  
Jan Kiebist ◽  
Katrin Scheibner ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Methyl Esters ◽  
Saturated Fatty Acids ◽  
Industrial Applications ◽  
Monooxygenase Activity ◽  
Acidic Conditions ◽  
Oil Hydrolysis ◽  
Derivatives Of ◽  
Environmentally Friendly Production

Epoxides of vegetable oils and free and methylated fatty acids are of interest for several industrial applications. In the present work, refined rapeseed, sunflower, soybean, and linseed oils, with very different profiles of mono- and poly-unsaturated fatty acids, were saponified and transesterified, and the products treated with wild unspecific peroxygenases (UPOs, EC 1.11.2.1) from the ascomycete Chaetomium globosum (CglUPO) and the basidiomycete Marasmius rotula (MroUPO), as well as with recombinant UPO of the ascomycete Humicola insolens (rHinUPO), as an alternative to chemical epoxidation that is non-selective and requires strongly acidic conditions. The three enzymes were able of converting the free fatty acids and the methyl esters from the oils into epoxide derivatives, although significant differences in the oxygenation selectivities were observed between them. While CglUPO selectively produced “pure” epoxides (monoepoxides and/or diepoxides), MroUPO formed also hydroxylated derivatives of these epoxides, especially in the case of the oil hydrolyzates. Hydroxylated derivatives of non-epoxidized unsaturated fatty acids were practically absent in all cases, due to the preference of the three UPOs selected for this study to form the epoxides. Moreover, rHinUPO, in addition to forming monoepoxides and diepoxides of oleic and linoleic acid (and their methyl esters), respectively, like the other two UPOs, was capable of yielding the triepoxides of α-linolenic acid and its methyl ester. These enzymes appear as promising biocatalysts for the environmentally friendly production of reactive fatty-acid epoxides given their self-sufficient monooxygenase activity with selectivity toward epoxidation, and the ability to epoxidize, not only isolated pure fatty acids, but also complex mixtures from oil hydrolysis or transesterification containing different combinations of unsaturated (and saturated) fatty acids.

scholarly journals Fatty Acids, Volatile and Sensory Profile of Multigrain Biscuits Enriched with Spent Malt Rootles

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 442 ◽  
Author(s):  
Maria Simona Chiş ◽  
Anamaria Pop ◽  
Adriana Păucean ◽  
Sonia Ancuța Socaci ◽  
Ersilia Alexa ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Methyl Esters ◽  
Score Test ◽  
Essential Amino Acids ◽  
Aroma Compounds ◽  
Raw Material ◽  
Sensory Profile ◽  
Optimum Level ◽  
Brewing Industry ◽  
Derivatives Of

Spent malt rootlets, a by-product of the brewing industry, are a rich source of protein, essential amino acids, healthy fats, polyphenols and minerals, and could be a new promising type of raw material from the nutritional, economic, sensory, and technical perspectives. However, their specific aroma profile could limit their addition in baked products. The aim of this work was to study the effect of spent malt rootlets addition on volatile derivatives of enriched biscuits in relation to their sensory profile. For this purpose, spent malt rootlets and enriched biscuits (0–25% spent malt rootlets added) were analyzed by GC-MS techniques, in order to obtain their fatty acids methyl esters and volatile compounds profile, while for the sensory analysis a nine-point hedonic score test was used. The results of this study reveal the fatty acids and volatile profile of spent malt rootlets and of the enriched biscuits with spent malt rootlets pointing out the contribution of fatty acids to the generation of aroma compounds. The influence of different aroma compounds on the consumer’s preferences was studied and the optimum level addition of spent malt rootlets in multigrain biscuits was found to be 15%.

STUDIES ON THE IN VITRO ANTITUMOR ACTIVITY OF FATTY ACIDS: VI. DERIVATIVES OF MONO- AND DI-CARBOXYLIC AND UNSATURATED FATTY ACIDS

1962 ◽  
Vol 40 (10) ◽  
pp. 1367-1373 ◽  
Author(s):  
Susan Tolnai ◽  
Joseph F. Morgan
Keyword(s):  
Fatty Acids ◽  
Antitumor Activity ◽  
Mammary Carcinoma ◽  
Unsaturated Fatty Acids ◽  
Methyl Esters ◽  
Ehrlich Carcinoma ◽  
Neutral Ph ◽  
Derivatives Of

Previous studies on the in vitro antitumor activity of saturated and unsaturated fatty acids have been extended to a series of hydroxy and keto derivatives and methyl esters of fatty acids. All compounds were tested against the ascites forms of the Ehrlich carcinoma, the Gardner lymphosarcoma, and the TA3 mammary carcinoma. Marked differences between the antitumor activity of the parent compounds and those of the substituted derivatives were observed. Most consistent in vitro antitumor activity was shown at both acid and neutral pH levels by the keto-derivatives of unsaturated fatty acids.

STUDIES ON THE IN VITRO ANTITUMOR ACTIVITY OF FATTY ACIDS: VI. DERIVATIVES OF MONO- AND DI-CARBOXYLIC AND UNSATURATED FATTY ACIDS

1962 ◽  
Vol 40 (1) ◽  
pp. 1367-1373
Author(s):  
Susan Tolnai ◽  
Joseph F. Morgan
Keyword(s):  
Fatty Acids ◽  
Antitumor Activity ◽  
Mammary Carcinoma ◽  
Unsaturated Fatty Acids ◽  
Methyl Esters ◽  
Ehrlich Carcinoma ◽  
Neutral Ph ◽  
Derivatives Of

Previous studies on the in vitro antitumor activity of saturated and unsaturated fatty acids have been extended to a series of hydroxy and keto derivatives and methyl esters of fatty acids. All compounds were tested against the ascites forms of the Ehrlich carcinoma, the Gardner lymphosarcoma, and the TA3 mammary carcinoma. Marked differences between the antitumor activity of the parent compounds and those of the substituted derivatives were observed. Most consistent in vitro antitumor activity was shown at both acid and neutral pH levels by the keto-derivatives of unsaturated fatty acids.

scholarly journals PREPARATION OF SULPHATED FATTY ACID DERIVATIVES OF SPIRULINA OIL

2021 ◽  
Vol 73 (1) ◽  
pp. 34-42
Author(s):  
M. B. Umerzakova ◽  
◽  
B. K. Donenov ◽  
R.B. Sarieva ◽  
Zh. N. Kainarbaeva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Ir Spectroscopy ◽  
Methyl Esters ◽  
Reaction Products ◽  
Subsequent Reaction ◽  
Fatty Acid Derivatives ◽  
Sodium Bisulfate ◽  
Dry Biomass ◽  
Derivatives Of

A new sulfonated derivative of Spirulina oil fatty acids was obtained in the work.This derivative is obtained from dry biomass of microalgae in several stages: extraction of lipids from dry biomass, lipid methylation, amination of the formed methyl esters of Spirulina fatty acids, modification of amide with maleic anhydrideand subsequent reaction of the synthesized monoester with sodium bisulfate. The conditions for all stages of the synthesis of the sulfonated derivative were optimized.The initial compounds and reaction products were identified by IR spectroscopy.

Sign in / Sign up

Export Citation Format

Share Document