Étude de l'extraction enzymatique des huiles d'argousier (Hippophaë rhamnoides)
|Authors:||Quesada Romero, Sandra Viviana|
|Advisor:||Belkacemi, Khaled; Ratti, Cristina|
|Abstract:||Sea buckthorn oils (Hippophaё Rhamnoides L.) have therapeutic interest due to their medicinal properties. Three oil types of different composition can be extracted from the fruit: soft parts (pulp, peel) and seeds. There are many extraction methods such as those with solvents or supercritical fluids that have been successfully used for sea buckthorn. However, the use of enzymes for extraction of sea buckthorn oils has not been studied yet, although this method has shown good results for other fruits and vegetables. In this study, three hydrolases capable to hydrolyze the pulp and seed cell walls have been chosen to extract sea buckthorn oils (cv. Indian Summer). The extraction performance was compared to those obtained with the extraction with chloroform-methanol, used as a reference method. Results obtained for pulp oil extraction with commercial enzymes Viscozyme L and Pectinex Ultra SP-L, showed the best yields of 22,64± 0,03% and 19,23±0,03%, respectively, at pH 4.0. The seed-peel oil was extracted with two enzymes mixtures, Celluclast-Pectinex Ultra SP-L and Celluclast-Viscozyme, and compared to the control, which was an extraction in presence or absence of hexane. Both enzyme mixtures showed similar results in terms of extraction yield. An approximate increase of 28.0 % of seed-peel oils were obtained when using enzymes compared to the control extraction. The oil composition obtained using the above techniques do not present significant differences with literature values for each type of oil. Pulp oil was characterized by high contents of palmitic acid (36.3%), palmitoleic acid (40%), and low contents of oleic (4.61%) and linoleic (9.78%) acids, whereas, the seed – peel oil (a mixed oil) contained moderate amounts of palmitic (20.6%), palmitoleic (20.0%), linoleic (22.97%) and linoleic (20.83%) acids. The triglyceride analysis corroborated the fatty acids results.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||13 April 2018|
|Collection:||Thèses et mémoires|
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