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Physicochemical Characteristics of Black Garlic after Different Thermal Processing Steps

  • Kang, Ok-Ju (Department of Food, Nutrition and Biotechnology, Kyungnam University)
  • Received : 2016.08.01
  • Accepted : 2016.10.10
  • Published : 2016.12.31

Abstract

This study investigated the physicochemical characteristics of black garlic (BG) after different thermal processing steps. Compared with fresh garlic (FG), the moisture content and pH in BG decreased significantly, while the ash content and browning intensity increased during thermal processing. The total mineral and the free sugar contents were significantly higher than that of the BG2 and BG4 samples, respectively. The free sugar content increased by 16-fold in the BG cloves compared with that of FG, while the amino acid content increased during the first stage of thermal processing, and subsequently decreased. The thiosulfinate content in all samples decreased to during thermal processing. The pyruvic acid content initially increased and then decreased during thermal processing. These results contribute to our understanding of the role of thermal processing in the quality formation of BG.

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