Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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The Effect of Antibrowning Agents on Enzymatic Reaction in Apple Concentrate

사과농축액에 대한 갈변억제제 처리효과

  • Published : 2002.06.01
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Abstract

The effect of antibrowning agents such as PVPP (polyvinylpolypyrrolidone), bentonite, gelatin, celite 545, tannic acid and sodium sulfite in apple concentrate was investigated for the control of enzymatic browning by comparing physicochemical properties (pH, color, turbidity), polyphenoloxidase activity and contents of polyphenol compounds. In color value, apple concentrate containing PVPP showed higher L value (lightness) than control and other antibrowning agents. The turbidity (absorbance at 660 nm) of apple concentrate added PVPP, gelatin celite 545, tannic acid and sodim sulfite were 0.003, 0.038, 0.018 and 0.022, respectively. PVPP was regarded to remove suspended solids effectively. Polyphenoloxidase activity and polyphenolics(catechol, catechin, chlorogenic acid, epicatechin) content of apple concentrate used PVPP significantly reduced. Therefore PVPP was proved to be effective for enzymatic antibrowning agent considering to color, turbidity, polyphenoloxidase activity and polyphenol compounds in apple concentrate.

과실가공품에서의 갈변을 억제하기 위하여 사과농축액에 갈변억제제 즉, PVPP (polyvinylpolypyrrolidone), bentonite, gelatin, celite 545, tannic acid, sodium sulfite를 첨가하여 여과한 후 갈변억제효과를 측정하였다. 색도의 변화는 PVPP를 첨가한 농축액에서 L값(lightness)이 8.16으로 대조구와 다른 농축액에 비해 갈변억제에 효과가 있음을 알 수 있었으며, 탁도(660 nm에서의 흡광도)는 대조구 0.05인데 비해, PVPP, gelatin celite 545, tannic acid, sodium sulfite를 함유한 사과농축액은 각각 0.003, 0.038, 0.038, 0.018, 0.022로 다소 낮은 수치를 보여 부유물 등의 제거효과가 나타났으며 특히 PVPP의 효과가 뚜렷하였다. 또한, PVPP 처리된 사과농축액 중의 PPO(polyphenoloxidase)활성과 폴리페놀화합물(catechol, catechin, chlorogenic acid, epicatechin 등) 함량에서도 현저하게 감소하여 효소적 갈변이 억제되었음을 알 수 있었다. 따라서, PVPP가 사과농축액의 색상, 탁도, PPO활성 및 폴리페놀화합물 함량 등 효소적 갈변특성을 개선시키는 우수한 갈변억제제임을 확인하였다.

Keywords

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