Browsing by Author "Carrasco-Sandoval, Jonathan"

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    Chemometric optimisation of pressurised liquid extraction for the determination of alliin and S-allyl-cysteine in giant garlic (Allium ampeloprasum L.) by liquid chromatography tandem mass spectrometry
    (2021) Peterssen-Fonseca, Darlene; Henriquez-Aedo, Karem; Carrasco-Sandoval, Jonathan; Canumir-Veas, Juan; Herrero, Miguel; Aranda, Mario
    Introduction Giant garlic is a functional food that contains different kinds of bioactive molecules with beneficial effects on chronic noncommunicable diseases like diabetes and cardiovascular conditions. Considering biosynthesis pathways, abundance, and biological activity, alliin and S-allyl-cysteine were used as chemical markers of organosulphur compounds present in giant garlic.
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    Impact of molecular weight and deacetylation degree of chitosan on the bioaccessibility of quercetin encapsulated in alginate/chitosan-coated zein nanoparticles
    (2023) Carrasco-Sandoval, Jonathan; Aranda, Mario; Henriquez-Aedo, Karem; Fernandez, Marcos; Lopez-Rubio, Amparo; Fabra, Maria Jose
    This work aimed at studying the effect of molecular weight (MW) and deacetylation degree (DD) of chitosan on the quercetin bioaccessibility encapsulated in alginate/chitosan-coated zein nanoparticles (alg/chiZN). The chitosan coating layer produced nanoparticulate systems with good stability parameters, high encapsulation efficiency (EE) and a higher bioaccessibilty of quercetin after in-vitro digestion. By increasing the DD of chitosan, the zeta-potential of the colloidal system significantly increased (>= 27.1 mV), while low and very low MW chitosans generated systems with smaller particle sizes (<= 277.8 nm) and polydispersity index [PDI (0.189)]. The best results, in terms of EE (>= 84.44) and bioaccessibility (>= 76.70), were obtained when the systems were prepared with low MW chitosan and high DD. Thus, the alg/chiZN nanocapsules may be a promising delivery system for improving the quercetin bioaccessibility or other compounds with a similar chemical nature, especially when higher DD and lower MWs are used.