CONJUGATED FATTY ACIDS IN SOME CUCURBITACEAE SEED OILS

1967 ◽  
Vol 45 (7) ◽  
pp. 1081-1086 ◽  
Author(s):  
Mary J. Chisholm ◽  
C. Y. Hopkins
Keyword(s):  
Fatty Acids ◽  
Distribution Pattern ◽  
Eleostearic Acid ◽  
Seed Oils ◽  
Punicic Acid ◽  
Conjugated Fatty Acids ◽  
Telfairia Occidentalis

Punicic acid was identified as a component of the seed oils of Cyclanthera explodens (26%) and Cayaponia africana (38%). α-Eleostearic acid was identified in Momordica dioica (55%) and its occurrence in Telfairia occidentalis (7 and 12%) was confirmed. Evidence of conjugated acids was noted in Fevillea peruviana and Bryonia alba. The oils of four other species of Cucurbitaceae had no conjugated acids. The distribution pattern of fatty acids in this family is discussed.

IDENTIFICATION OF CONJUGATED TRIENE FATTY ACIDS IN CERTAIN SEED OILS

1962 ◽  
Vol 40 (11) ◽  
pp. 2078-2082 ◽  
Author(s):  
C. Y. Hopkins ◽  
Mary J. Chisholm
Keyword(s):  
Fatty Acid ◽  
Eleostearic Acid ◽  
Octadecatrienoic Acid ◽  
Seed Oils ◽  
Punicic Acid ◽  
Calendula Officinalis ◽  
Conjugated Fatty Acid ◽  
Mild Conditions ◽  
Conjugated Triene ◽  
Major Acid

Seed oils were hydrolyzed under mild conditions and the major conjugated fatty acid of each oil was isolated and identified. In two families, species which were closely related botanically contained different but isomeric acids. Thus, in the Bignoniaceae, Jacaranda chelonia had cis trans,cis-8,10,12-octadecatrienoic acid as a major acid while Catalpa speciosa had trans,trans,cis-9,11,13-octadecatrienoic acid. In the Cucurbitaceae, Momordica charantia had the ordinary cis,trans,trans-9,11,13-octadecatrienoic (α-eleostearic) acid while M. balsamina had cis,trans,cis-9,11,13-octadecatrienoic (punicic) acid. M. balsamina is a new and convenient source of punicic acid. α-Eleostearic acid was identified as a major acid in examples of Valerianaceae and Rosaceae. Further proof was obtained that the fatty acid of Calendula officinalis (Compositae) is trans,trans,cis-8,10,12-octadecatrienoic acid.

A survey of the conjugated fatty acids of seed oils

1968 ◽  
Vol 45 (3) ◽  
pp. 176-182 ◽  
Author(s):  
C. Y. Hopkins ◽  
Mary J. Chisholm
Keyword(s):  
Fatty Acids ◽  
Seed Oils ◽  
Conjugated Fatty Acids

FATTY ACID COMPOSITION OF SOME CUCURBITACEAE SEED OILS

1964 ◽  
Vol 42 (3) ◽  
pp. 560-564 ◽  
Author(s):  
Mary J. Chisholm ◽  
C. Y. Hopkins
Keyword(s):  
Gas Chromatography ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Acid Composition ◽  
Eleostearic Acid ◽  
Seed Oils ◽  
Punicic Acid ◽  
Major Acid

Seed oils of nine species of Cucurbitaceae were analyzed by gas chromatography and other techniques. The oil of Ecballiumelaterium yielded 22% of punicic acid; Cucumisdipsaceus and Cucurbitaficifolia had the ordinary palmitic–oleic–linoleic composition; a variety of Momordicacharantia had 57% of α-eleostearic acid. Occurrence of punicic acid as the major acid of Trichosanthesanguina was confirmed. No evidence could be found for the existence of an isomer of linoleic acid in Telfairiapedata oil. The fatty acid composition was determined quantitatively for the above oils and for those of Cucumismelo, Lagenariasiceraria, and Luffacylindrica. The 4-bromophenacyl esters of α-eleostearic and punicic acids were prepared.

scholarly journals Biosynthesis of α-elostearic Acid in the Seed of Momordica Charantia L.

2020 ◽  
Author(s):  
Katarzyna Jasieniecka-Gazarkiewicz ◽  
Sylwia Klińska ◽  
Antoni Banaś
Keyword(s):  
Fatty Acids ◽  
Transgenic Plants ◽  
Eleostearic Acid ◽  
Momordica Charantia ◽  
Lower Amount ◽  
Oilseed Crops ◽  
Developing Seeds ◽  
Conjugated Fatty Acids

Abstract Momordica charantia L. is a plant belonging to Cucurbitaceae family. Currently it is cultivated throughout the word mostly for the immature fruits. Its seeds oil contains a large amount of α-eleostearic acid (αESA) , an isoform of α-linolenic acid with conjugated double bound. Oils with conjugated fatty acids are valuable both for industrial and nutraceutical application. After cloning the fatty acid conjugases (FADX), several attempts have been made to modify oilseed crops towards production of such fatty acids. The obtained transgenic plants produced, however, a much lower amount of conjugated fatty acids than FADX original plants. It has been postulated that this could be connected with the problem in the transfer of such fatty acids from the place of its synthesis – phosphatidylcholine (PC) – to the place of their storage – triacylglycerol (TAG) in the transgenic plants. In this study we have characterised the biosynthesis of α-eleostearic acid both in vivo in developing seeds of M. charantia and in vitro in experiments with microsomal fractions prepared from developing seeds of this plant. We observed significant differences in transfer of αESA from the place of its biosynthesis to TAG in these two system. In vivo αESA was very efficiently transferred while in vitro synthesised αESA remained mostly in PC.

CONJUGATED FATTY ACIDS OF TRAGOPOGON AND CALENDULA SEED OILS

1960 ◽  
Vol 38 (12) ◽  
pp. 2500-2507 ◽  
Author(s):  
Mary J. Chisholm ◽  
C. Y. Hopkins
Keyword(s):  
Fatty Acids ◽  
Maleic Anhydride ◽  
Seed Oil ◽  
Degradation Products ◽  
Octadecatrienoic Acid ◽  
Seed Oils ◽  
Conjugated Diene ◽  
Conjugated Fatty Acids ◽  
Conjugated Triene ◽  
Octadecadienoic Acids

The seed oil of Tragopogonporrifolius L. was found to contain about 4% of conjugated diene hydroxy fatty acids, identified as 9-hydroxy-10,12- and 13-hydroxy-9,11-octadecadienoic acids. On dehydration, the products were 8,10,12- and 9,11,13-octadecatrienoic acids. The diene acids were cis,trans or trans,cis and the triene acids were judged to be all-trans.The conjugated triene acid of Calendulaofficinalis L. seed oil was isolated and identified as trans,8:trans, 10:cis,12-octadecatrienoic acid by spectral analysis, by the structure of the maleic anhydride adduct, and by identification of degradation products. All-trans-8,10,12-octadecatrienoic acid was found to react with maleic anhydride at both the 8,11 and 10,13 positions.

Identity and configuration of conjugated fatty acids in certain seed oils

Lipids ◽  
1969 ◽  
Vol 4 (2) ◽  
pp. 89-92 ◽  
Author(s):  
C. Y. Hopkins ◽  
M. J. Chisholm ◽  
J. A. Orgodnik
Keyword(s):  
Fatty Acids ◽  
Seed Oils ◽  
Conjugated Fatty Acids

scholarly journals Oil Content, Fatty Acid Composition, Physicochemical Properties, and Antioxidant Activity of Seed Oils of Ten Moroccan Pomegranate Cultivars

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Sarah Loukhmas ◽  
Ebrahim Kerak ◽  
Sara Elgadi ◽  
Fatima Ettalibi ◽  
Abderraouf El Antari ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seed Oils ◽  
Punicic Acid ◽  
Yellow Colour ◽  
Pomegranate Seeds ◽  
Functional Components

Pomegranate seeds (Punica granatum L.) are quantitatively and qualitatively a relevant agri-food by-product which is rich in molecules beneficial to human health. In order to valorize this resource, this study aims to evaluate and to compare, for the first time, the characteristics of fruit seeds and seed oils of ten pomegranate cultivars grown in the Center of Morocco. Physical and biometric parameters of seeds, fatty acid composition, physicochemical criteria, and antioxidant activity of seed oils were determined. The results showed significant differences between the ten studied cultivars. The seeds yielded oil contents ranging from 17.59% to 24.69% and presented high contents of polyunsaturated fatty acids (PUFAs) exceeding 89%. The major fatty acid was punicic acid, which represented more than 80% of fatty acids, while other fatty acids such as linoleic acid, oleic acid, and palmitic acid could be considered a minority. Oils showed yellow colour due to the contents of chlorophyll (0.12–1.87 mg/kg) and pheophytin (0.39–3.87 mg/kg) and presented high antioxidant activity (IC50: 0.69–1.80 mg/mL). Therefore, the studied pomegranate seeds had a very good oil yield, and these oils have presented an optimal fatty acid composition and high levels of antioxidant activity. Thus, they could be useful in the formulation of novel foods or used as preservatives and functional components in food industry.

scholarly journals GC Analysis of Seven Seed Oils Containing Conjugated Fatty Acids

Separations ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 51
Author(s):  
Robert Goldschmidt ◽  
William Byrdwell
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Methyl Esters ◽  
Seed Oils ◽  
Natural Occurrence ◽  
Conjugated Fatty Acids ◽  
Flame Ionization ◽  
Two Samples ◽  
Poly Ethylene ◽  
Multiple Species

The fatty acid compositions, including isomer compositions, of seven seed oils containing conjugated fatty acids (CFA) were determined. Seed oils were extracted using a modified Folch extraction, converted to fatty acid methyl esters, and analyzed by gas chromatography (GC) with mass spectrometry and flame ionization detection. The MS detector was operated in positive-ion chemical ionization mode using methane reagent gas. GC was performed using two columns providing different retention characteristics: a poly(ethylene glycol) column and a more polar biscyanopropyl column. The complimentary information provided by the two columns was crucial to peak identification in several cases. The major CFA species in the samples are well known but all contained lesser amounts of additional CFA that have not been widely reported. All samples contained multiple species of conjugated linolenic acid, and two samples also contained small amounts of conjugated linoleic acid. The seed oils of Jacaranda mimosifolia and Calendula officinalis were found to contain 8c,10t,12t-18:3, the natural occurrence of which has only been recently reported in some other samples. The seed oil of Impatiens balsamina has been reported to contain four conjugated 18:4 species, and we present evidence for a fifth conjugated 18:4 isomer.

scholarly journals Thladiantha Seed Oils - New Source of Conjugated Fatty Acids: Characterization of Triacylglycerols and Fatty Acids

2020 ◽  
Vol 69 (9) ◽  
pp. 993-1000
Author(s):  
Nguyen Van Anh ◽  
Deineka Victor ◽  
Vu Thi Ngoc Anh ◽  
Deineka Ludmina ◽  
Doan Thi Lan Phuong ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Seed Oils ◽  
Conjugated Fatty Acids
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