Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effects of Enzyme Treatments on Yield and Flavor Compounds of Garlic Extracts

효소처리에 의한 마늘 착즙액의 수율 및 향미성분변화

  • Published : 2007.06.30
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Abstract

In this study, attempts were made to develop a garlic juice extraction method that would result in minimum changes in quality. Protopectinase and a mutienzyme containing cellulase, pectinesterase, ${\beta}-glucanase$, etc. were applied to garlic residue after first extraction, and the yields of garlic juice and the flavor component changes of the juices were investigated. Enzyme concentrations of 0.04, 0.08, and 0.12% which were based on pulp weight before extraction were added and allowed to hydrolyze for 30, 60, 90 and 120 min,. respectively. Increase in the garlic juice yield was observed according to the amount of enzyme added and the reaction time until reaching a maximum point. When 0.12% protopectinase was applied to the garlic residue for 90 min, the yield increased by 13.8%. Under the same conditions, when multienzyme was applied to the garlic residue, the yield increased by 14.5%, which was considered the maximum. The flavor compounds decreased when compared with the total GC peak area of garlic juice prepared without enzymes(control). The volatile flavor compounds in garlic juice prepared with 0.12% protopectinase for 60 min decreased by 6%. The free sugars profile of the garlic juice prepared with 0.12% protopectinase for 60 min was similar to that of the control. The type of enzyme used did not affect the free amino acid profile of the garlic juice. These results indicate that the optimum conditions for extraction of garlic juice are hydrolyzing the residue with 0.12% protopectinase for 60 min, extracting garlic juice from the hydrolyzed reside, and then combining the extracted juice with the first extraction.

마늘의 향미성분을 가급적 그대로 유지하고 착즙수율을 향상시킬 수 있는 착즙방법을 개발하고자 하였다. 착즙수율을 향상시키기 위하여 protopectinase와 복합요소(cellulase, pectinesterase 및 ${\beta}-glucanase$ 등이 혼합된 효소)를 마늘펄프로부터 1차로 착즙하고 남은 잔사에 적용하여 마늘주스의 수율증가율과 향미성분 변화를 측정하였다. 착즙 전 마늘펄프 무게에 대하여 효소를 0.04, 0.08 및 0.12%씩 가하여 30, 60, 90 및 120분간 각각 가수분해하였다. 마늘주스의 수율 증가는 최대수율에 도달할 때까지 효소의 첨가량 및 반응시간의 증가와 더불어 증가하였다. 0.12%의 protopectinase를 첨가하여 90분간 가수분해하여 착즙한 결과 수율은 13.8%가 증가하였다. 복합효소를 0.12% 첨가하여 90분간 가수분해 후 착즙한 경우에는 최대수율인 14.5%의 증가효과가 있었다. GC로 휘발성 향기성분을 분석한 결과 효소를 처리하지 않은 대조구(control)와 총 피크면적으로 계산하여 비교할 경우 감소하였다. 0.12%의 protopectinase를 가하여 60분간 분해 후 제조한 마늘 주스의 휘발성 향기성분 향량은 약 6%가 감소하였다. 마늘주스의 유리당 함량은 0.12%의 protopectinase를 가하여 60분간 분해후 제조한 마늘 주스가 대조구와 가장 유사한 함량을 나타내었다. 유리아미노산 함량은 사용한 효소의 종류에 영향을 크게 받지 않는 것으로 나타났다. 이상의 결과로부터 0.12%의 protopectinase를 마늘착즙잔사에 가하여 60분간 분해 후 착즙한 액을 마늘펄프로부터 직접 착즙한 액과 혼합하면 착즙수율을 최대로 증가시키고 향미 성분의 변화를 최소화시킬 수 있는 것으로 나타났다.

Keywords

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