Studies on Naringinase of Mold. (Part 3) Naringin solubilizing enzyme of Aspergillus niger S-1 and removing of bitter taste from chinese citron.

사상균의 Naringin 분해효소에 관한 연구(제3보) Aspergillus niger S-1의 naringin 용해화효소의 특성과 여름밀감의 탈고미에 대하여

Studies were carried out on the practical use of Naringinase and some chracteristics of Naringin solublizing enzme which might hydrolyae naringin to purunin. Obtained results were as follows. 1. Selected strain for Naringinase producing was identified to be Aspergillus niger S-1 and its naringinase was applied to chinese citron processing to remove the bitter taste. 2. Of the naringinase, naringin solubilizing enzyme was purified on a DEAE-Sephadex A-50 column and crystalized from acetone and ammonium sulfate. 3. Hydrolized naringin which has higher solubility rather than naringin or naringenin were identified by thin layer chromatography. 4. Hydrolyzed naringin and naringin were separatly determinated by ethylacetate extraction and this result was compared with sensory test.

\circled1 분리선별한 Naringinase 생산균인 S-1 SP, 은 Aspergillus niger 이었다. \circled2 Naringinase중 정제된 naringin 용해화 효소를 aceton과 ammonium sulfate에 의해 결정화하였다. \circled3 Naringin용해화 효소와 naringenin 생성효소가 DEAE-sephadex A-50 column chromatography에 의해 분리되었다. \circled4 Naringin 용해화 효소에 의해 분해된 물질이 Thin layer chromatography에의해 확인되었으며 이물질은 ethylacetate 추출법에 의해 naringin분리 정량이 가능하였다. \circled5 Crude naringinase를 여름밀감 과즙과 병조림 탈고미에 이용하여 ethylacetate 추출법에 의해 naringin을 정량하고 식미시험 결과와 비교하였다. 본 연구에 많은 조언을 해 주신 경북대학교 농화학과 서정훈 박사님께 감사를 드립니다.