This experimental thesis is focused on the comparison between natural lipid mixtures extracted from the Pichia Pastoris yeast bred under normal conditions and in a deuterated environment. These lipid mixtures have been extracted, purified and characterized through a series of procedures which constitute a protocol that must be optimized. The two lipid mixtures obtained therefore have a different isotopic composition. Both were used for the preparation of unilamellar vesicles which were analyzed through the DLS (Dynamic Light Scattering) and for the preparations of hydrated powders, characterized by X-ray diffraction. The differences between the various samples, in addition to that concerning the composition particular lipid, are related to stability and different degree of hydration. The analyzes carried out have refuted the hypothesis that the two mixtures are exactly the same and the specific differences determined will be fundamental to modify the production protocols of the lipid mixtures used so far.
Questa tesi sperimentale è focalizzata sul confronto tra miscele lipidiche naturali estratte dal lievito Pichia Pastoris allevato in condizioni normali e in ambiente deuterato. Queste miscele lipidiche sono state estratte, purificate e caratterizzate attraverso una serie di procedimenti che costituiscono un protocollo che deve essere ottimizzato. Le due miscele lipidiche ottenute presentano quindi composizione isotopica differente. Sono state entrambe utilizzate per la preparazione di vescicole unilamellari che sono stati analizzati attraverso il DLS (Dynamic Light Scattering) e per le preparazioni di polveri idratate, caratterizzate tramite Diffrazione dei raggi X. Le differenze tra i vari campioni, oltre a quella riguardare la composizione lipidica particolare, sono relative alla stabilità e al diverso grado d’idratazione. Le analisi effettuate hanno confutato l’ipotesi che le due miscele siano esattamente uguali e le specifiche differenze determinate saranno fondamentali per modificare i protocolli di produzione delle miscele lipidiche sinora utilizzati.
CONFRONTO STRUTTURALE DELLA STABILITA' TRA MISCELE LIPIDICHE
FORLI, EDUARDO
2019/2020
Abstract
This experimental thesis is focused on the comparison between natural lipid mixtures extracted from the Pichia Pastoris yeast bred under normal conditions and in a deuterated environment. These lipid mixtures have been extracted, purified and characterized through a series of procedures which constitute a protocol that must be optimized. The two lipid mixtures obtained therefore have a different isotopic composition. Both were used for the preparation of unilamellar vesicles which were analyzed through the DLS (Dynamic Light Scattering) and for the preparations of hydrated powders, characterized by X-ray diffraction. The differences between the various samples, in addition to that concerning the composition particular lipid, are related to stability and different degree of hydration. The analyzes carried out have refuted the hypothesis that the two mixtures are exactly the same and the specific differences determined will be fundamental to modify the production protocols of the lipid mixtures used so far.File | Dimensione | Formato | |
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Eduardo_Forli Tesi.pdf
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https://hdl.handle.net/20.500.12075/4072