Banca de DEFESA: IGOR UCELLA DANTAS DE MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : IGOR UCELLA DANTAS DE MEDEIROS
DATA : 11/11/2016
HORA: 08:30
LOCAL: Auditório do Núcleo de Ensino e Pesquisa em Petróleo e Gás - NUPEG/UFRN.
TÍTULO:

Nutritional, technological and functional characterization of freeze dried tropical fruit pomaces.

PALAVRAS-CHAVES:

Tropical fruit, industrial waste, phytochemicals, thermal treatment.

PÁGINAS: 80
GRANDE ÁREA: Ciências da Saúde
ÁREA: Nutrição
RESUMO:

The dietary consumption of fruit is associated with beneficial health effects due the presence of fiber, vitamins and bioactive compounds, especially phenolic compounds (PC) and vitamins antioxidant activity. Brazil has a diversified production of tropical fruits such as acerola, guava and cashew usually processed and forming large amounts of agro-industrial pomaces. Thus, this study aimed to characterize freeze-dried acerola pomace (ACE), guava (GUA) and cashew (CAS) as their nutritional, technological and functional aspects associated with the thermal-treatment study of the bioactive content. The residues have high values of dietary fiber, especially insoluble in GUA (40.6%) and soluble in ACE (14.2%). The protein value (13.8%) and lipids (9.2%) was higher for the GUA, but in general, all pomaces have reduced calorie content. The featured minerals were potassium, calcium and magnesium, especially in CAS (K: 83.5 mg/g) and ACE (Ca: 31.9 mg/ g and Mg: 2.8 mg/g). As the technological aspects, all residues showed low hygroscopicity and promising water holding capacity (4,4 – 12,0 g/g) and oil (3,0 – 5,4 g/g). The ACE was the higher total PC (5331.7 mg AGE/ 100g), total flavonoid (760.9 mg CE/ 100g) and antioxidant activity (688.1 μmol TE/g in ORAC) and GUA presented higher proanthocyanidins (217.8 mg PA2/ 100g). The ACE has the outstanding phenolic profile, with salicylic acid (3503.4 mg/ 100g), myricetin (929.4mg / 100g) and catechin (498.2 mg/ 100g). No residue showed antibacterial activity to the studied microorganisms. The ACE was more sensitive to heat treatment with retention of total PC reaching 29% at 150 °C. However, the antioxidant activity showed higher retention to all pomaces and temperatures (above 70%). In the case of CAS an increase up to 133% at 150 ° C was detected, which may be related to the formation of melanoidins in all pomaces (with variations up to 582%). All these data conclude that the freeze dried pomaces have a high nutritional, technological and bioactive potential, including in the fortification of other food matrices.

MEMBROS DA BANCA:
Externo à Instituição - HERYKA MYRNA MAIA RAMALHO - UNP
Externo ao Programa - 302225 - NELY HOLLAND
Presidente - 1246737 - ROBERTA TARGINO PINTO CORREIA