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논문 상세정보

블랜칭 및 용질 처리에 따른 참취(Aster scaber Thunb.)의 phytochemical 성분 및 품질특성

Phytochemical compounds and quality characteristics of Aster scaber Thunb. in response to blanching conditions and treatment with solutes

초록

블랜칭 처리조건 확립을 위하여 시간(1, 3, 5 min) 및 용질의 종류[0.1% soluble Ca(Sol-Ca), 0.1% soium bicarbonate($NaHCO_3$), 0.1% magnesium sulfate($MgSO_4$)]를 달리한 참취의 품질특성을 비교하였다. 블랜칭 시간이 경과함에 따라 녹색도와 chroma 값은 감소되고 색차는 증가하였으며, polyphenol 함량은 유의적으로 감소하였고 블랜칭 처리시간이 3분 이상 경과될 시 급격히 저하되었다. Carotenoid 함량의 경우 적정 블랜칭 처리 시 함량은 증가하는 반면 ascorbic acid 함량은 유의적으로 감소하는 결과를 나타내어 열적 손실이 동반되는 것으로 관찰되었다. 경도 및 절단력은 처리 시간이 길어짐에 따라 유의적으로 감소하였으며, pectinesterase와 polygalacturonase 저해활성은 3분 이후부터는 불활성화 수치가 증가하여 효소활성을 저해시키는 것으로 나타났다. 총균수 및 대장균군수의 변화를 측정한 결과, 대조구의 경우 5 log CFU/g 수준으로 검출되었으나, 블랜칭 처리한 처리구에서는 2~4 log CFU/g 수준으로 미생물이 감소하였으며, 대장균군수는 검출되지 않았다. Chlorophyll 함량은 증가하는 반면 chlorophyll a 및 b의 비율(Ca/Cb)은 유의적으로 감소하였으며, 관능적 기호특성에서는 외관 및 색상의 경우 블랜칭 처리 시간이 길어짐에 따라 감소하는 경향을 나타낸 반면 향미 및 전반적인 기호도에서는 블랜칭 처리에 의하여 기호특성이 증가하였다가 점차 감소하였으며, 전반적으로 3분간 블랜칭 처리 시 높은 선호도를 나타내었다.

Abstract

The quality characteristics of blanched Aster scaber with the blanching condition and various solutes (non-treated, NT; soluble Ca, SC; sodium bicarbonate, SB; and magnesium sulfate, MS) were evaluated with different blanching times and solutes. The blanching process decreased the total polyphenolics, ascorbic acid contents, hardness, and cutting strength of the leaves. As for the pectinesterase and polygalacturonase, the blanching process increased their inhibitory activities, and more than 90% of them were inactivated in all the samples that were blanched. For the total counts and the number of coliform groups, the number of total aerobes at 5.92-log CFU/g before the blanching process was reduced to the approximately 2-3 log scale, and the coliform group was not detected after the blanching. The blanching also significantly decreased the total chlorophyll a and b ratios. The sensory characteristics of the Aster scaber according to the test group showed that the leaves blanched for 3 min were the most highly evaluated in terms of their overall acceptability. The phenolic compound, chlorophyll, and carotenoid contents tended to increase from before their blanching, and the Ca/Cb ratio was higher in the SC. These results showed that SC and MS treatment had greater effects on the quality characteristics and the pigmentation.

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