Banca de QUALIFICAÇÃO: FÁBIO GONÇALVES MACÊDO DE MEDEIROS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : FÁBIO GONÇALVES MACÊDO DE MEDEIROS
DATA : 20/05/2019
HORA: 14:30
LOCAL: auditório do CTEC
TÍTULO:

Curcumin microencapsulation into yeast cells (Saccharomyces cerevisiae) via osmoporation: process parameters, thermal stability and antioxidant capacity

PALAVRAS-CHAVES:

curcumin; osmoporation; S. cerevisiae; antioxidant activity; stability; microencapsulation.

PÁGINAS: 56
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Tecnologia Química
ESPECIALIDADE: Alimentos
RESUMO:

This study investigated the encapsulation of curcumin into Saccharomyces cerevisiae cells through osmoporation as an efficient way of increasing curcumin stability. The influence of three process parameters (cell, ethanol and curcumin concentrations) on the encapsulation process were evaluated and the obtained bio-capsules were characterised with regard to physical and photochemical stabilisation. Results showed that the encapsulation efficiency was favoured by the increase of cells/curcumin ratio and ethanol concentration up to 60%. Differential scanning calorimetry (DSC) curves revealed that yeast-encapsulation increased curcumin melting point up to 207 °C. Encapsulated curcumin retained over 80% of antioxidant activity after thermal treatment (150 °C) and over 70% after a 50-day exposure to artificial light. Photochemical stability of yeast-encapsulated curcumin was increased by 5.7-fold and the half-life time reached 181 days when bio-capsules were exposed to light. Overall, osmoporation-produced yeast bio-capsules confirmed the versatility and efficiency of osmoporation as an encapsulation technique that could successfully improve curcumin stability.

MEMBROS DA BANCA:
Externo à Instituição - ANTONIO DE ANCHIETA CAMARA JUNIOR
Externa ao Programa - 1714243 - DANIELLA REGINA ARANTES MARTINS SALHA
Externa ao Programa - 1803301 - KATIA NICOLAU MATSUI
Externa ao Programa - 1517220 - MARCIA REGINA DA SILVA PEDRINI
Presidente - 1246737 - ROBERTA TARGINO HOSKIN