scholarly journals Effect of genetic background on the stability of sunflower fatty acid composition in different high oleic mutations

2018 ◽  
Vol 98 (11) ◽  
pp. 4074-4084 ◽  
Author(s):  
Constanza Alberio ◽  
Luis AN Aguirrezábal ◽  
Natalia G Izquierdo ◽  
Roberto Reid ◽  
Sebastián Zuil ◽  
...  
Author(s):  
В.И. МАРТОВЩУК ◽  
С.А. КАЛМАНОВИЧ ◽  
А.А. ЛОБАНОВ ◽  
Е.В. МАРТОВЩУК

Исследовано влияние механохимической активации на гидратируемость фосфолипидов растительных масел. Для эксперимента использовали механохимический активатор, обеспечивающий высокие локальные давления, сдвиговые деформации и кавитационный эффект, при следующих параметрах работы: давление на контактирующих поверхностях 70 МПа, частота 180 Гц, скорость сдвига 10200 с–1, размер капли эмульсии 1–2 мкм. Обработку образцов подсолнечного масла осуществляли в течение от 0 до 80 с при температурах 50, 60 и 70°С. Активность фосфолипидов оценивали по величине их адсорбции на границе с полярной поверхностью (водой) в оптимальном температурном режиме при обработке в механохимическом активаторе и без нее. Установлено, что механохимическая активация способствует снижению энергии активации с 6,4 до 4,7 кДж/моль за счет химических и структурных изменений фосфолипидов. В жирнокислотном составе фосфолипидов на 10–12% увеличилось содержание олеиновой кислоты при соответствующем уменьшении линолевой; в фосфатидилэтаноламинах и фосфатидилсеринах отмечено увеличение до 3% содержания пальмитиновой кислоты и незначительно – стеариновой кислоты. Эти изменения жирнокислотного состава и физических свойств фосфолипидов способствуют повышению их гидратируемости и уменьшению доли полиненасыщенных жирных кислот, что должно обеспечить стабильность обработанных в механохимическом активаторе масел к окислению при хранении. The effect of mechanochemical activation on the hydration of phospholipids of vegetable oils has been studied. A mechanochemical activator providing high local pressures, shear deformations and cavitation effect was used for the experiment with the following operating parameters: pressure on the contact surfaces of 70 MPa, frequency of 180 Hz, shear rate of 10200 s–1, the size of the emulsion drop of 1–2 microns. Processing of sunflower oil samples was carried out during 0 to 80 s at temperatures of 50, 60 and 70°C. The activity of phospholipids was estimated by the amount of their adsorption at the border with the polar surface (water) in the optimal temperature mode when processed in a mechanochemical activator and without it. It was found that mechanochemical activation contributes to a decrease in the activation energy from 6,4 to 4,7 kJ/mol due to chemical and structural changes in phospholipids. In the fatty acid composition of phospholipids, the content of oleic acid increased by 10–12% with a corresponding decrease in linoleic acid; in phosphatidylethanolamines and phosphatidylserines, the increase in the content of palmitic acid was noted to 3%, and stearic acid – slightly. These changes in the fatty acid composition and physical properties of phospholipids contribute to increasing their hydration and reducing the proportion of polyunsaturated fatty acids, which should ensure the stability of the oils processed in the mechanochemical activator to oxidation during storage.


2017 ◽  
Vol 202 ◽  
pp. 146-157 ◽  
Author(s):  
Patricia Angeloni ◽  
María Mercedes Echarte ◽  
Gustavo Pereyra Irujo ◽  
Natalia Izquierdo ◽  
Luis Aguirrezábal

2018 ◽  
Vol 6 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Jeong-Dong Lee ◽  
Minsu Kim ◽  
Krishnanand P. Kulkarni ◽  
Jong Tae Song

2021 ◽  
Vol 2 (4) ◽  
pp. 1-6
Author(s):  
Fathi Ben Amar ◽  
Imen Guellaoui ◽  
Mohamed Ayadi ◽  
Olfa Elloumi ◽  
Mohamed Ali Triki ◽  
...  

An olive breeding program was started in Tunisia in 1993 in order mainly to improve the fatty acid composition of the local cultivar ‘Chemlali Sfax’. ‘Zeitoun Ennour’ is a new cultivar obtained from a cross between ‘Chemlali Sfax’ and the local dual-purpose use cultivar ‘Chemchali Gafsa’. The morphological study of this cultivar showed that eleven characters dealing with fruit and endocarp differed from ‘Chemlali Sfax’, mainly regarding to their respective weights. This new cultivar had the same sensitivity to Verticillium dahliae Kleb and earlier bearing than the original variety. Its olive production was considered as high as for ‘Chemlali Sfax’ but with partial self-compatibility and late maturity. The new cultivar realized a net improvement in comparison with the original cultivar particularly regarding its fatty acid composition with very high oleic acid content (>75 %) and low palmitic and linoleic acid contents (<10 %). The new cultivar was recently released and will be available for growers as soon as possible.


2016 ◽  
Vol 73 ◽  
pp. 25-33 ◽  
Author(s):  
Constanza Alberio ◽  
Natalia G. Izquierdo ◽  
Teresa Galella ◽  
Sebastián Zuil ◽  
Roberto Reid ◽  
...  

2008 ◽  
Vol 100 (4) ◽  
pp. 794-800 ◽  
Author(s):  
Carla Dullemeijer ◽  
Peter L. Zock ◽  
Ruben Coronel ◽  
Hester M. Den Ruijter ◽  
Martijn B. Katan ◽  
...  

Very long-chain n-3 PUFA from fish are suggested to play a role in the development of the brain. Fish oil feeding results in higher proportions of n-3 PUFA in the brains of newborn piglets. However, the effect of fish oil on the fatty acid composition of specific cerebral brain lobes in juvenile pigs is largely uninvestigated. This study examined the effect of a fish oil diet on the fatty acid composition of the frontal, parietal, temporal and occipital brain lobes in juvenile pigs (7 weeks old). Pigs were randomly allocated to a semipurified pig diet containing either 4 % (w/w) fish oil (n 19) or 4 % (w/w) high-oleic acid sunflower oil (HOSF diet, n 18) for a period of 8 weeks. The fish oil diet resulted in significantly higher proportions (%) of DHA in the frontal (10·6 (sd1·2)), parietal (10·2 (sd1·5)) and occipital brain lobes (9·9 (sd 1·3)), but not in the temporal lobe (7·7 (sd1·6)), compared with pigs fed the HOSF diet (frontal lobe, 7·5 (sd1·0); parietal lobe, 8·1 (sd 1·3); occipital lobe, 7·3 (sd1·2), temporal lobe, 6·6 (sd1·2). Moreover, the proportion of DHA was significantly lower in the temporal lobe compared with the frontal, parietal and occipital brain lobes in pigs fed a fish oil diet. In conclusion, the brains of juvenile pigs appear to be responsive to dietary fish oil, although the temporal brain lobe is less responsive compared with the other three brain lobes. The functional consequences of these differences are a challenging focus for future investigation.


1981 ◽  
Vol 8 (1) ◽  
pp. 13-15 ◽  
Author(s):  
M. Adnan ◽  
C. J. Argoudelis ◽  
E. Rodda ◽  
J. Tobias

Abstract Changes in tocopherol content, peroxide value and fatty acid composition were measured during storage of reconstituted partially defatted peanuts. These values were compared with those of unreconstituted partially defatted peanuts, whole peanuts and the corresponding oils. Reconstitution effectively inactivated the enzyme lipoxygenase and was destructive on tocopherols, particularly α- tocopherol. The stability of the oil during storage, as measured by the peroxide value, is much greater within the peanuts than in the corresponding extracted oil. No changes in fatty acid composition could be observed in reconstituted partially defatted peanuts. A need for immediate reconstitution following mechanical oil extraction could not be demonstrated as both products had equal oxidative stability.


OCL ◽  
2016 ◽  
Vol 23 (5) ◽  
pp. D502 ◽  
Author(s):  
Adeline Gouzy ◽  
Anne Paulhe-Massol ◽  
Zéphirin Mouloungui ◽  
Othmane Merah

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