Phase-Separable Aqueous Amide Solutions as a Thermal History Indicator

  • KITSUNAI Makoto
    Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology TOPPAN FORMS CO., LTD.
  • MIYAJIMA Kentaro
    Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology
  • MIKAMI Yuzuru
    Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology
  • KIM Shokaku
    Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology
  • HIRASAWA Akira
    TOPPAN FORMS CO., LTD.
  • CHIBA Kazuhiro
    Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology

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Abstract

Aqueous solutions of several new amide compounds for use as simple thermal history indicators in the low-temperature transport of food and other products were synthesized. The phase transition temperatures of the aqueous solutions can be freely adjusted by changing the amide-water ratio in solution, the sodium chloride concentration of the water, and the type of amide compound. It is expected that these aqueous solutions can be applied as new thermal history indicators.

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