한라봉감귤의 Si+CaO 혼합필름포장과 LDPE 필름포장에 따른 저장 중에 품질변화를 검토하였다. 과육율은 포장처리와 무처리에서 로 저장기간에 따른 한라봉과 M16A의 과육율의 변화가 없었으며, 무처리에서 저장 후기 약간의 증가를 보였다. 경도는 M16A가 한라봉보다 100 g-force 정도 높은 값을 보였으며, 포장재처리에 따른 큰 변화는 보이지 않았다. 가용성고형물은 한라봉과 M16A 모두 Brix였으며, 무포장처리에서 저장 후기에 약간의

한라봉의 생육과정과 수확 후에 온도처리에 따른 품질변화를 검토하였다. 한라봉은 12월 초순까지 지속적으로 당도()가 증가하였다. 한라봉 변이품종인 M16A에서는 10월 이후에 산 함량이 감소가 두드러져 1% 수준을 유지하였다. 그러나 한라봉에서는 산 함량의 감소가 지속적으로 일어나, 1월 중순 이후에도 산 함량이 높아 후숙처리가 필요함을 알 수 있었다. 과일의 경도는 11월까지 서서히 감소하여 1,000 g-force 수준을 유지하였다. 가용성고

가온재배한 한라봉감귤의 물리화학적 성분특성을 검토하였다. 수분 함량은 한라봉과 M16A에서 각각 87.42%와 88.12%, 총당은 8.01%와 7.81%, 산 함량은 1.09%와 0.99 %이었다. 비타민 C 함량은 한라봉과 M16A에서 각각 72.01 와 68.01 mg/100g으로 온주밀감에 비하여 매우 높았다. 무기물 함량 중에 K는 한라봉은 1369.33 mg/100g으로 M16A 의 938.33mg/100g에 비해 높았으며, 한라봉은

가온재배한 한라봉감귤의 분포도, 물리화학적 품질특성을 검토하였다. 한라봉은 과중 이 90%를 차지하는데 비하여, 한라봉 변이종인 M16A 품종에서는 나무나이가 어리고 열매솎기의 영향으로 결실 정도가 낮아 을 중심으로 한 큰 과일의 분포가 상대적으로 많았다. M16A의 과일크기가 한라봉에 비하여 컸지만 껍질두께는 오히려 3.29mm로 한라봉의 3.51mm에 비해 얇고 과육과 밀착되어 있었다. 중간 위치에 달려있는 한라봉의 경도가 832.8 g-fo

Kiyomi tangor(Citus unshiu x sinensis) was stored at 3 and 85% relative humidity, and the changes in firmness, pectin degrading enzymes activity and other physicochemical properties of citrus fruits during storage were investigated. Decay ratio and weight loss during 180 days’ storage were increased gradually to 13.0% and 12.9%, respectively. Firmness of fruits with 2 mm probe was decreased gradually from 808.7 g-force to 406.4 g-force, and moisture of peel and flesh were decreased from 76.5% to from 89.6% to 87.6% during storage, respectively. Exo-polygalacturonase activity of peel after 150 days’ storage were increased gradually to 558.09 units/100g. Pectin methylesterase activity of peel and flesh were increased from 14.7 units/g to 2.3 units/g, and from 9.4 units/ml to 2.7 units/ml at 150days’ storage, respectively. Endo-polygalacturonase activities were not changed notably during storage. Alcohol-insoluble solid(AIS) of peel was not changed notably. During storage of the fruits water soluble pectin(WSP) of peel and flesh were increased from 474.49 mg/100g to 614.29mg/100g, and from 66.91mg/100g to 92.74mg/100g as wet basis, respectively. Hexameta-phosphate soluble pectin(HMP) of peel were decreased from 405.5mg/100g to 270.43mg/100g, hydochloric acid soluble pectin(HSP) of peel was also decreased from 544.02mg/100g to 412.64mg/100g during storage. Total pectin substance(TPS) of peel and flesh were decreased from 1,424.01mg/100g to 1,297.36mg/100g, and from 165.51mg/100g to 171.54mg/100g, respectively. Composition ratio of pectin was in order of WSP > HSP > HMP.

Physicochemical properties and the conditions of cold storage of kiyomi clangor(Citrus unshiu x sinensis) produced in Cheju were investigated. Firmness, edible part ratio, soluble solids, and acid content were decreased gradually with incurasing fruit size. Carbohydrates in juice were consisted of 65.12% sucrose, 19.65% fructose, and 15.23% glucose The main organic acrid In juice was 57.4% of citric acid, and others were lactic acid, malic acid, oxalic acid and fumaric acid, respectively. Weight loss were occured very. slowly to about 6% till late of May, but decayed fruits were occurred very slowly to about 6% till late of May, but decayed fruits were arisen to about 8% at 3, and about 13% at 5 of storage temperature. The changes of peel moisture content, soluble solids, total sugar, vitaamin C, and density of fruits were slightly occured during cold storage. Cold storage at 3 and 87% relative humidity kept freshness of citrus fruits for a long-term without damage of cold injury.