| Summary: | 碩士 === 大葉大學 === 藥用植物與保健學系 === 105 === The black garlic is a food made of unpeeled garlic by Maillard reaction in a high temperature and high humidity environment. However, there are still many problems in the production of black garlic, such as the time consumption of ripening process, rancid odor and poor flavor. In this study, the tea and black garlic are combined and ripened together, to discuss the synergetic effect of tea on the black garlic process, and to evaluate the effectiveness and flavor changes.
This study discusses whether the joint ripening of garlic and tea can 1) enhance the effectiveness; 2）accelerate ripening; 3）improve flavor. First of all, three kinds of tea are selected, which are green tea, black tea and oolong, and the temperature is controlled at 70℃, the relative humidity is 90%, to test the effectiveness. The findings show that the total phenol content and flavone content are measured after 35 days, the green tea black garlic has the highest antioxidant content, this is Stage I. The black garlic ripened with green tea is used for effectiveness evaluation, physical and chemical properties and functional evaluation on Days 7, 14, 21, 28 and 35. The experimental results show that the browning of green tea black garlic is increased by 1.3 times on Day 7, the antioxidant ability is markedly increased, and the antioxidant activity of optimum GBG is chelated ferrousion 66.33±1.23% on Day28,reducing force 79.82±1.03% on Day 28,ABTS+65.25±1.64 %on Day21 and DPPH 72.28±1.61% on Day28 respectively.
The functional evaluation result shows the rancid odor of the black garlic with green tea is reduced, and the tea aroma is enhanced, proving the conception of this experiment. When the garlic is ripened with green tea, the ripening is accelerated, the effective constituents are increased, and the flavor of black garlic is improved. Therefore, the process can be changed by using green tea and the effectiveness is good, this technology is expected to be used in production in the future to produce an excellent health food.
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