Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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An Estimated Value and Change in TDF Binding Major Minerals of Soybean Sprouts Depending on Cultivation Days and Parts

콩나물의 재배기간과 부위별 TDF에 결합된 주요 무기질의 변화와 추정 이용율

  • Published : 2009.08.30
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Abstract

This study was conducted to determine an estimated value and change in TDF (total dietary fiber) binding major minerals (Ca, P, K Mg) of soybean sprouts depending on cultivation periods of 1, 3 or 5 days, and parts of cotyledon and hypocotyl. The compositions of TDF binding major minerals in soybean sprouts were evaluated by the enzymatic-gravimetric method developed by Prosky and adopted by AOAC. The content of TDF binding P ranged between 915.28 mg and 1037.82 mg per 100 g cotyledon. Average contents of Ca, K, and Mg in cotyledon ranged between 541.67 mg and 634.34 mg, 180.91 mg and 253.98 mg, 231.90 mg and 301.01 mg, respectively, on dry matter basis. The average contents of TDF binding Ca in hypocotyl per 100 g were between 454.36 mg and 540.33 mg, and other major minerals contents were between 149.24 mg and 186.21 mg for P, 164.17 mg and 182.78 mg for K, and 152.53 mg and 161.22 mg for Mg, respectively. The proportional changes of Ca, an estimated value in cotyledon, ranged between 5.58% and 30.98%, 47.18% and 59.10% for P, 95.24% and 95.50% for K, and 58.45% and 68.64% for Mg, respectively, based on dry matter. An estimated value of Ca, P, K, and Mg in hypocotyl ranged between 6.71% and 13.52%, 91.03% and 91.76%, 96.91% and 98.92%, and 61.03% and 66.37%, respectively, on dry matter basis.

본 연구는 식품으로 널리 이용되고 있는 콩나물의 식이섬유를 재배기간과 부위에 따라 효소중량법으로 측정하고 콩나물의 부위별 TDF의 함량과 이에 결합된 주요 무기질의 함량을 구하여 빼줌으로써 주요 무기질인 Ca, P, K, Mg의 추정 이용율을 규명하는데 그 목적이 있다. 콩나물의 TDF 함량은 자엽에서 1일째 42.37%로 가장 높았고 재배일수가 증가함에 따라 유의적으로 감소하였으며, 배축에서는 3일째보다 증가하여 5일째 40.43%였다. 콩나물의 TDF에 결합된 무기질의 함량은 100 g당 P이 915${\sim}$1037 mg으로 가장 높아 콩나물의 세포벽에 가장 많이 결합되어 있었고, Ca이 541${\sim}$ 634 mg으로 두 번째로 높았다. 배축은 5일째 Ca이 540.33 mg/100 g으로 배축의 세포벽에 가장 많이 결합되어 있었다. 무기질의 추정 이용율은 자엽에서 K이 약 94${\sim}$95%로 가장 높았으며 Mg, P, Ca은 재배일수가 증가함에 따라 그 이용율도 유의적으로 증가하였다. 배축은 자엽과 마찬가지로 K의 이용율이 96${\sim}$98%로 가장 높았으며, P는 약 91%로 두번째로 높은 이용율을 보여 콩나물이 무기질의 공급원임을 알 수 있다.

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