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국내 주요지역에서 생산되는 곶감 및 표면 백색분말의 당조성과 분말의 형태를 주사전자현미경으로 관찰하였다. 곶감과육의 당함량은 56~59% 정도였으며 주로 glucose와 fructose로 이루어져 있었다. 백색분말은 당 84.6%, 수분 12.5% 및 불용성 물질이 2.7% 정도였으며 당조성에 있어서는 glucose가 83.3%를, fructose가 16.7%로 대부분이 glucose였다. 백색분말을 주사전자현미경으로 관찰한 결과 판, 꽃, 침 및 뿔등의 형태를 이루고 있었으며 수화후 재결정화한 glucose와 비슷한 형태를 나타내었다. 곶감 표면의 백색분말은 건조과정중 과육내부의 당이 수분의 이동과 함께 건조표면으로 이동하여 건조가 진행됨에 따라 주로 glucose가 결정화된 것으로 보여진다.
Chemical composition and microscopic observation of white powder developed in the surface of dried persimmon which produced in several region in Korea were studied. Sugar content in flesh of dried persimmon was 56~59% and composed of glucose and fructose. White powder developed in the surface of dried persimmon was composed of sugar 84.6%, moisture 12.5% and insoluble matter 2.7%, respectively. The major sugar of white powder was glucose with 83.3% and fructose was 16.7%. With scanning electron microscopic obsevation, white powder was seen the shape like a plate, flower, needle and horn, and it was similiar to the shape of recrystalized glucose after hydration. White powder in surface of dried persimmon was seemed that glucose and fructose in flesh were migrated with moisture to drying surface during drying process and glucose was crystalized in the surface of dried persimmon.
