Effects of Enzyme Treatments on Yield and Flavor Compounds of Garlic Extracts

효소처리에 의한 마늘 착즙액의 수율 및 향미성분변화

  • Published : 2007.06.30

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.

Keywords

garlic juice;extraction method;enzymes;yield;flavor compounds

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