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Glutamine-Glucose Model System에서 가열조건별 반응생성물과 색의 변화

Study of Reaction Products and Color Changes in Glutamine-Glucose Model System during Heating

  • 이영근 (부산대학교 생명응용과학부)
  • 발행 : 2006.08.30

초록

Glucose-glutamine 모델반응에서 생성물의 종류와 갈변에 의한 색의 변화를 조사하기 위하여, 가열조건을 125, 150 및 $175^{\circ}C$에서 각각 10, 20 및 30분간 가열하고 반응물의 색을 Hunter colorimeter로 측정한 후, ethyl acetate로 추출하여 GC/MS로 생성물을 분석하였다. GC/MS 분석에서 acetic acid, butanoic acid, 2-butenoic acid, di-(2-ethylhexyl) phthalate, 2,3-dihydro-3.5-dihydroxy-6-methyl-4H-pyran-4-one 및 5-hydroxymethylfurfural의 6종의 다량 생성물과 1,3-dimethylbenzene, 2-ethylhexanol, fufural, 5-methylfurfural, 2-pyrrolidinone 그리고 2,6-di(t-butly)-4-hydroxy-4-methyl-2,5-cyclohexadien-1-one 6종의 미량 생성물이 확인되었다. 최대 생성물인 acetic acid와 미량 생성물인 2-ethylhexanol 및 2-pyrrolidinone은 온도 및 가열시간의 경과에 따라 전반적으로 증가하였으나, 그 외 9종의 화합물을은 $125^{\circ}C$부터 생성량이 증가하지만 $150^{\circ}C$ 또는 $175^{\circ}C$를 정점으로 그 이상 온도, 또는 가열시간을 증가할수록 생성량은 감소하였다. 반응생성물이 Hunter $L^*$값은 온도 및 시간의 증가에 따라 지속적으로 감소하여 암색이 반응의 최종산물에 의한 색으로 나타났으며, $a^*$$b^*$$125^{\circ}C$에서 낮고 $150^{\circ}C$ 또는 $175^{\circ}C$, 10분에서 최고점을 나타낸 후 온도 및 시간의 증가에 따라 감소하여 적색과 황색은 반응 중간생성물에 의한 발현이며 반응후기에는 고분자의 화합물에 고착되어 암색을 발현하는 것으로 추정되었으며, 가열조건의 변화에 따른 $a^*$$b^*$값의 변화는 앞서 언급한 9종 화합물들의 생성 변화와 유사하였다.

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피인용 문헌

  1. Isolation and Identification of an Antioxidant Substance from Heated Onion (Allium cepa L.) vol.40, pp.3, 2011, https://doi.org/10.3746/jkfn.2011.40.3.470