Banca de DEFESA: JÉSSICA BATISTA DA COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JÉSSICA BATISTA DA COSTA
DATA : 01/07/2019
HORA: 09:00
LOCAL: Sala de Defesas do PPGCTA
TÍTULO:

Adsorption and desorption of phenolic compounds using macroporous resins from coffee husks

PALAVRAS-CHAVES:

Residues; Bioativities; Coconut coffee; Coffea canephora.

 

PÁGINAS: 69
GRANDE ÁREA: Ciências Agrárias
ÁREA: Ciência e Tecnologia de Alimentos
SUBÁREA: Tecnologia de Alimentos
ESPECIALIDADE: Aproveitamento de Subprodutos
RESUMO:

Coffee is one of the most produced crops and one of the most consumed products in the world background and Brazil is its largest exporter of this grain. However, during its processing, about 20% of its production is converted into solid residues, which presents a large amount of bioactive substances such as phenolic compounds, of wide interest for the pharmaceutical and food industries. Therefore, finding alternatives in obtaining these substances more economically and in a way that does not affect the environment has been the target of several studies. The use of ethanol and water as solvents presents are an alternative to the traditional solvents and the adsorption process using macroporous resins has been distinguished in this scenario, since it is an efficient method in the separation and in the application on industrial scale. Although the enormous potential of this process, no work using macroporous resins in the separation of phenolic compounds from coffee husks is available in the literature. Thus, the objective of this work was to extract phenolic compounds from the coffee husk using ethanol solution in water, to characterize the extract and to evaluate the adsorption and desorption of these compounds in different types of macroporous resins. The extract was characterized according to its antioxidant properties and pharmacological properties, the results for all the analyzes were expressive according to the data available in the literature. It showed a better iron reduction result (FRAP) and more expressive values for the inhibition of the α-glucosidase enzyme. Among the six resins studied, two were selected, XAD 7HP and XAD 16 and among them XAD 7HP was more promising due to the characteristics of the compounds present in the initial extract and their physical characteristics, such as surface area, pore size and polarity.

MEMBROS DA BANCA:
Externo à Instituição - BERNARDO DE SA COSTA - UFF
Externo à Instituição - DAVY WILLIAM HIDALGO CHÁVEZ - UFRRJ
Presidente - 2455049 - JOSE LUCENA BARBOSA JUNIOR
Interno - 2311373 - MARIANA TEIXEIRA DA COSTA MACHADO
Externo à Instituição - NATHÁLIA DA ROCHA RODRIGUES - UES