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Type:	Artigo de Periódico
Title:	Ohmic heating technology in dulce de leche: physical and thermal profile, microstructure, and modeling of crystal size growth
Authors:	Ramon Silva Ramon Silva Rocha Jonas de Toledo Guimarães Celso Fasura Balthazar Gustavo Luis de Paiva Anciens Ramos Hugo Scudino Tatiana Colombo Pimentel Érica de Melo Azevedo Márcia Cristina da Silva Rodrigo Nunes Cavalcanti Verônica Ortiz Alvarenga Maria Carmela Kasnowski Holanda Duarte Erick Almeida Esmerino Mônica Queiroz de Freitas Adriano Gomes da Cruz
Abstract:	The effect of ohmic heating (OH) parameters (voltage gradient, 2, 4, 6, 8, and 10 V cm−1) on the quality properties of dulce de leche (DL) was evaluated. Optical (L*, C*, and BI), rheological (flow curves and oscillatory tests) and thermal (differential scanning calorimetry) parameters as well as microstructure (optical microscopy) and modeling of the crystal size growth were evaluated during the storage time (60 days at 25 °C). Overall, OH processing resulted in lower optical (C* and BI) parameters, indicating a product with a lower intensity of caramel brown color. For the rheological assays, it was observed a decrease in the viscosity and consistency of the products (lower k values and higher n and G’ values). Finally, the OH-treated products presented higher numbers of lactose crystals of smaller size. The impact of OH was dependent on the voltage gradient, with a more pronounced effect on the product submitted to high electric field (10 V cm−1). Overall, OH is an interesting technology to be used in DL processing, being recommended the utilization of 8 V cm−1 of voltage gradient due to the better-quality properties.
Subject:	Tecnologia de alimentos Doce de leite Aquecimento ôhmico Crescimento de cristais
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	FAR - DEPARTAMENTO DE ALIMENTOS
Rights:	Acesso Restrito
metadata.dc.identifier.doi:	10.1016/j.fbp.2020.09.001
URI:	http://hdl.handle.net/1843/41869
Issue Date:	Nov-2020
metadata.dc.url.externa:	https://www.sciencedirect.com/science/article/pii/S0960308520305125#!
metadata.dc.relation.ispartof:	Food and Bioproducts Processing
Appears in Collections:	Artigo de Periódico

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