Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/199984
Type: Artigo de periódico
Title: Probiotic Yogurts Manufactured With Increased Glucose Oxidase Levels: Postacidification, Proteolytic Patterns, Survival Of Probiotic Microorganisms, Production Of Organic Acid And Aroma Compounds.
Author: Cruz, A G
Castro, W F
Faria, J A F
Lollo, P C B
Amaya-Farfán, J
Freitas, M Q
Rodrigues, D
Oliveira, C A F
Godoy, H T
Abstract: We investigated the effect of increased glucose oxidase concentration as a technological option to decrease oxidative stress during the processing of probiotic yogurts. Probiotic yogurts were produced with increased concentrations of glucose oxidase (0, 250, 500, 750, or 1,000 mg/kg) and submitted to physicochemical and microbiological analysis at 1, 15, and 30 d of refrigerated storage. Higher concentrations of glucose oxidase (750 and 1,000 mg/kg) and a longer storage time were found to have an influence on the characteristics of the probiotic yogurt, contributing to more extensive postacidification, an increase in the dissolved oxygen level, and higher proteolysis. In addition, increased production of aroma compounds (diacetyl and acetaldehyde) and organic acids (mainly lactic acid) and a decrease in the probiotic bacteria count were reported. The use of glucose oxidase was a feasible option to minimize oxidative stress in probiotic yogurts. However, supplementation with excessive amounts of the enzyme may be ineffective, because insufficient substrate (glucose) is present for its action. Consumer tests should be performed to evaluate changes in the sensory attributes of the probiotic yogurts with increased supplementation of glucose oxidase. In addition, packaging systems with different permeability to oxygen should be evaluated.
Subject: Acetaldehyde
Acetic Acid
Diacetyl
Food Storage
Food Technology
Glucose Oxidase
Hydrogen-ion Concentration
Lactic Acid
Oxidative Stress
Oxygen
Probiotics
Proteolysis
Yogurt
Rights: fechado
Identifier DOI: 10.3168/jds.2011-4582
Address: http://www.ncbi.nlm.nih.gov/pubmed/22541455
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

Files in This Item:
File SizeFormat 
pmed_22541455.pdf678.78 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.