식혜에 함유된 이소말토올리고당과 밥알에 30unit/ml의 α-아밀라아제, 글루코아밀라아제, α-글루코시다아제, β-아밀라아제를 가하여 작용시킨 결과 글루코아밀라아제 외에는 일부밖에 가수분해하지 못하였다. 그리고, 인체의 효소인 α-아밀라아제와 α-글루코시다아제를 함께 작용시켜도 25%이상 가수분해하지 못하므로 비피두스균의 활성인자로 작용할 것으로 보인다. 밥알은 물에 녹지 않기 때문에 식이섬유로도 작용할 것으로 보인다.

Isomaltooligosaccharides in Sikhye were digested with enzyme (30unit/ml) of α-amylase, α-glucosidase and glucoamylase from Aspergillus awamori sweet potato β-amylase and human salivary α-amylase at 37℃ for 1 hour, respectively. These amylases acted on these saccharides to give hydrolysis products with less than 20% of degree of hydrolysis, except the case of glucoamylase with 62% of high degree of hydrolysis. α-Glucosidase plus human salivary α-amylase hydrolyzed it to attain the hydrolysis value up to 25%, but further increment of hydrolysis was not observed. Rice residue in Sikhye has similar sugar composition and structure, judging from sugar analyses by the enzymatic hydrolysis. These results suggest that isomaltooligosaccharides and rice residue in Sikhye can be a growth factor for Bifidobacterium and dietary fiber which is useful for human health.

• 소명환 | Myung Hwan So
• 이영숙 | Young Sook Lee
• 노완섭 | Wan Seob Noh