Banca de QUALIFICAÇÃO: SHEYLA MOREIRA GONÇALVES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : SHEYLA MOREIRA GONÇALVES
DATA : 14/03/2019
HORA: 09:30
LOCAL: Embrapa Agroindústria de Alimentos
TÍTULO:

Effects of high hydrostatic pressure on cellulose acetate film incorporated or not with oregano essential oil

PALAVRAS-CHAVES:

Hurdle technology, active packaging, non-thermal process, functional properties, food safety

PÁGINAS: 16
GRANDE ÁREA: Ciências Agrárias
ÁREA: Ciência e Tecnologia de Alimentos
SUBÁREA: Tecnologia de Alimentos
ESPECIALIDADE: Tecnologia de Produtos de Origem Animal
RESUMO:

Cellulose acetate (CA) films were evaluated for potential functional alterations caused by the incorporation of oregano essential oil (EO) and / or hydrostatic high pressure (HHP) treatment (200, 300 and 400 MPa for 5 and 10 min., each). Differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), mechanical and optical analyzes were performed. For CA films, the incorporation of EO (CAEO) caused a reduction in tensile strength (TS), young (YM) modulus, glass transition temperature (Tg) and relative crystallinity (CR), as well as causing changes in its morphology, optical properties and increased elongation at break (EB). The application of HHP to CA and CAEO films caused TS and YM reduction, increase of Tg, CR and EB, as well as morphological and optical changes. From the pressure-time binomial, the different pressures were more significant to determine the changes present in the HHP-treated films. The results also indicated that the changes caused by HHP in the CAEO films were mild when compared to the CA films. Thus, the film containing the EO is better to withstand the HHP conditions explored in this study, which is industrially desirable. Thus, the CAEO film, which, in turn, has antimicrobial properties, could potentially be used as a technology associated with HHP for food preservation.

MEMBROS DA BANCA:
Presidente - 025.072.978-40 - AMAURI ROSENTHAL - EMBRAPA
Interno - 009.412.587-26 - CARLOS WANDERLEI PILER DE CARVALHO - EMBRAPA
Externo à Instituição - ADRIANA DOS ANJOS SILVA - UFF