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칼슘 분말제재 첨가가 김치의 숙성 중 품질에 미치는 영향

Effect of Calcium Powder Addition on the Quality Characteristics of Kimchi

  • 발행 : 2002.06.01

초록

김치 제조시에 칼슘 분말제재를 절인 배추에 대하여 0.5%, 1.0% 및 1.5%씩 첨가하여 김치를 만들고, 숙성하면서 pH, 적정산도, 환원당 함량, 총균수, 젖산균수 및 관능검사와 같은 품질 특성을 조사하였다. 대조구는 숙성 10일 이후에 pH 4.0 이하인데 반하여 칼슘 분말제재를 첨가한 시험구는 pH 4.0 이상을 유지하였으며, 1.5% 첨가구의 값이 가장 높았다. 적정산도는 숙성 25일까지 지속적으로 증가하였으며, 10일까지 증가가 다른 기간에 비하여 현저하였다. 또한 칼슘 분말제재 첨가구는 김치 담금시부터 대조구보다 높은 환원당 함량을 나타내었으며, 숙성 기간 중 그 차이는 큰 변화를 보이지 않았다. 숙성 5일까지는 총균수와 젖산균수가 급격하게 증가하여 9 log(CFU/mL)에 도달하였으며, 대조구의 총균수가 가장 많았다. 그러나 그 이후에는 칼슘 분말제재를 첨가한 시험구의 총균수가 대조구보다 대체적으로 많았다. 관능적인 평가에서는 칼슘분말 제재를 0.5%, 1.0% 첨가한 시험구가 냄새 및 맛에 있어서 대조구보다 높은 점수를 얻었으나 대조구와 유의적인 차이를 보이지는 않았다.

Calcium-enriched powder was investigated for use as an ingredient in kimchi formulation to retard the fermentation rate and to fortify the nutritional quality of kimchi. The calcium powder was added to salted Chinese cabbage in the concentrations of 0.5, 1.0 and 1.5%, and then stored at 10$\^{C}$. Quality characteristics of kimchi such as pH, titratable acidity, reducing sugar content and microbial loads were measured during fermentation. After a lag period of 2 days, pH and reducing sugar abruptly decreased until 10 days, and then attained to stabilized levels, while acidity increased steadily for 20 days. Addition of calcium powder with 1.5% retarded the change rates of pH and acidity, showing the slowest chance and the highest final pH. Kimchi added with calcium powder maintained a higher reducing sugar content during the whole fermentation period of 25 days. Kimchi samples which were added with 0.5% and 1.0% of calcium powder and fermented at 10$\^{C}$ for 7 days showed better sensory scores in aroma and taste than the other samples.

키워드

참고문헌

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