The Effect of Potato Lipoxygenase on the Farinograph Characteristics of Wheat Flour Dough

감자 Lipoxygenase 가 밀가루 반죽의 페리노그라프 특성에 미치는 영향

  • 문정원 (부산여자전문대학 가정과) ;
  • 서명자 (부산대학교 식품영양학과)
  • Published : 1994.02.01

Abstract

To investigate the effect of potato lipoxygenase on the farinograph characteristics of wheat flour dough, composite flours containing enzyme-active potato flor (EPF) and hot-ar dried potato flour(HPF) were used. EPF was made by freeze-drying potato tuber. DPF (denaturated potato flour) was prepared by holding EPF at 8$0^{\circ}C$ for 18 hr in a dry oven. The potato flours were added to wheat flour at a level of 10% , respectivley. EPFB (enzyme-active potato flour blends, 90% wheat flour +105 enzyme -active potato flour) containing lipoxygenase activity gave higher farinogram peak time and higher stability values, lower MTI (mixing tolerance index ) and lower weakness values than those of HPFB(hot-air potato flour blends, 90% wheat flour + 10 % hot-air potato flour). Moreover, then lipoxygenase was added to DPFB(denatured potato flour blends , 90% wheat flour + 10% denatured potato flour) at a level of EPFB, it resulted in increasing stability, peak time and decreasing MTI , weakness at a level of EPFB. When the lipoxugenase was added to wheat flour with fumaric acid at alevel of 6.5 $\times$ 10units/g flour, lipoxygenase overcame the deleterious effects that fumaric acid including activated double-bond compounds have at mixing stability. Also the addition of liposxygenase with linoleic acid to defatted wheat flour resulted in the increase in stability and decrease in MTI value compared with those of linoleic acid and defatted wheat flour.

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