A strain of Saccharomyces cerevisiae BY-366 was isolated to produce a strong sucrose hydrolyzing enzyme. After entrapment of yeast cell invertase with alginate, enzymatic properties of immobilized cells were investigated. The results are as follows. 1. The optimum pH of invertase in immobilized cells and non immobilized cells was 6.0 and 5.0, and pH stability of invertase in immobilized cells and non immobilized cells was 6.0 and 5.0, respectively. 2. Activation energy of immobilized cells was 4.7㎉/㏖. 3. The immobilized preparation exhibited high resistance to heat and urea induced denaturation. 4. The bead size less than 2㎜ in diameter was desirable. 5. In spite of repeated use, the enzyme activity of immobilized cells was inhibited slightly in batch reaction, and a small column of the immobilized preparation could hydrolyze relatively high concentration of sucrose almost quantitatively to more than 6 days.

스톡은 수프와 소스를 만들기 위한 첫 과정으로 수프, 소스 및 주 요리의 맛을 좌우한다. 본 연구에서는 단호박만을 재료로 한 스톡 제조를 위하여 단호박의 첨가량, 물의 첨가량 및 에서의 가열시간 등의 3요인을 독립변수로, 단호박 스톡의 색상, 향, 맛 및 종합적기호도의 4가지 관능적 특성을 종속변수로 하여 반응표면분석으로 단호박 스톡 제조조건을 최적화하고, 최적 조건에서 제조한 단호박 스톡의 품질 특성을 조사하였다. 그 결과 단호박 스톡의 최적