Processamento do alho negro

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Pires, Liliane de Souza [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/122168
Resumo: Garlic (Allium sativum) has excellent nutritional value, due to its vitamins content like A, B2, B6 and C, amino acids, enzymes, biologically active compounds and minerals like iron, zinc, selenium and iodine. The various health benefits are generally attributed to organosulfur compounds. Black garlic is obtained from raw garlic submitted to thermal treatment at controlled temperature and relative humidity for long time periods. The black color of the garlic is due to the Maillard reaction and consequent melanoidins formation, as product of the reaction between sugar and amino acids present in fresh garlic. Although some authors have reported that during the maturation process the amount of antioxidants increases, the manufacturing of black garlic is still very empirical and studies about this processing have not been sufficiently clarified in the literature. Thus, the objective of this study was to investigate the processing of black garlic by aging or maturation, assessing the influence of temperature and relative humidity on the nutritional and sensory quality, in order to select the best operation conditions. For this purpose, garlic bulbs were exposed to atmospheres with controlled relative humidity by means of saturated salt solutions of NaCl and KCl, and three levels of temperatures (65 °C, 72.5 °C and 80 °C). Drying curves was determined by weighing the samples periodically. The diffusion equation adequately represented the moisture variation during the aging of garlic at 80 °C, whereas the 72.5 °C it was reasonable, and at 65 °C was less efficient. Occurred considerable temperature influence on diffusivity, which ranged from 2.4310-11 to 1.2710-10 m2/s, between the temperatures of 65 and 80 °C, when aged at ambient conditioned by saturated solution of NaCl, and the 1.5210-11 to 6.9210- 11 m2/s, between the same temperatures, with saturated solution of KCl. Influences of temperature, relative humidity and ...