Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Comparison of Nutritional Composition and Antioxidative Activity for Kabocha Squash and Pumpkin

단호박과 늙은 호박의 영양성분 및 항산화활성 비교

  • Published : 2005.04.30
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Abstract

Nutritional compositions and antioxidative activity of Kabocha squash (Cucurvita maxima Duch) as health food were compared with those of pumpkin (Cucurvita moschata Duch). Kabocha squash had higher soluble solids and twofold harder flesh than pumpkin. Crude protein, crude lipid and total amino acid contents of Kabocha squash were higher than those of pumpkin. Major free sugar in Kabocha squash was sucrose, and its content were 2.1 times higher than that of pumpkin. Major organic acids of Kabocha squash and pumpkin were succinic and malic acid, respectively. Kabocha squash had higher amounts of vitamins $A,\;B_1,\;B_2,\;C$ and C than pumpkin, while both showed similar mineral contents except for iron. Contents of Total pectin and hydrochloric acid soluble pectin of Kabocha squash were 17.00 and 7.37 g/100 g AIS, respectively. In pumpkin, total pectin content was 25.14 g/100 g AIS, and water soluble pectin content was higher than those of other pectin fractions. Contents of carotenoid in Kabocha squash and pumpkin were 285.91 and 24,62 mg% d.b., respectively. Kabocha squash had higher electron-donating radical-scavenging activity, SOD-like activity and nitrite-scavenging effect than pumpkin.

생과의 저장기간이 짧아 가공수요가 증가하고 있는 단호박의 이용 확대와 건강기능식품의 소재로의 활용을 위해 국내에서 건강식품으로 널리 사용되어 온 늙은 호박과 단호박의 영양성분 및 항산화 활성을 비교하였다. 단호박의 당도는 $14-16^{\circ}Brix$로 늙은 호박보다 높았으며 경도는 단호박이 1,602g, 늙은 호박이 788g로 나타났다. 단백질과 지방함량 및 총 아미노산 함량은 단호박이 늙은 호박보다 높았다. 유리당 함량도 단호박이 늙은 호박의 2.1배에 달했고, 당 조성도 sucrose가 83%로 가장 많았다. 단호박의 주요 유기산은 succinic acid인 반면, 늙은 호박의 주요 유기산은 malic acid였다. 단호박은 비타민 $A,\;B_1,\;B_2,\;C$의 함량이 모두 늙은 호박보다 월등히 많이 함유되어 있었고, Ca Na, K, Mg 및 P함량은 유사하였으나, Fe함량은 단호박이 높았다. 펙틴을 분획별로 분리하고 함량을 분석한 결과 단호박 알콜불용성고형물(AIS)의 총 펙틴 함량은 17.00%였으며 염산가용성펙틴(HSP)의 함량이 7.37%로 가장 많았다. 늙은 호박 AIS의 총 펙틴 함량은 25.14%였으며 이중 절반 이상인 16.51%가 수용성펙틴(WSP)이었다. 호박의 대표적인 기능성 성분인 카로틴 함량을 정량한 결과 단호박의 카로틴 함량은 285.91mg%로 늙은 호박의 24.62mg%보다 매우 높은 수준이었으며 HPLC로 정량한 카로티노이드의 조성에도 큰 차이가 있었다. 단호박은 전자공여에 의한 래디칼 소거능이 크고, SOD유사활성과 아질산염 소거작용이 높았으며, 이들의 활성은 늙은 호박보다 더 우수한 것으로 나타났다.

Keywords

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