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고정삼(Jeong Sam Koh),좌창숙(Chang Sook Jwa),김영휘(Yong Whee Kim) 한국응용생명화학회 1999 Applied Biological Chemistry (Appl Biol Chem) Vol.42 No.2
Quality characteristics of Satsuma mandarin (Citrus unshiu Marc. var. okitsu) harvested in early December according to production areas and sea level altitude of Cheju were investigated. Soluble solids and flesh ratio were 9.06∼12.98, 77.32∼81.27% on citrus fruits harvested in orchards located below 100 m sea level (lower area), and were 10.16∼12.26, 75.00∼81.55% in orchards 150 m sea level altitude (higher area), respectively. Acid content of citrus juice was 0.83∼1.21% in fruits harvested in lower area, and was 0.94∼1.34% in higher area except Hankyung-myun area. The differences of soluble solids and acid contents by harvesting periods for 10 days were 0.91 and 0.82 for soluble solids; 0.15 and 0.13% for acid contents, respectively. In proportion to late harvesting, Brix/acid ratio and fruit quality were improving. Soluble solids of fruits harvested from lower area were higher than those of fruits from higher area, but acid contents were lower in fruits from lower area than in fruits from higher area. In sensory evaluation on fruit appearence, the differences between two altitudes were not clear, but panelists marked higher points on fruits harvested in main production areas, Seogwipo-si and Namwon-cup which are southern areas. Fruit quality harvested in Seogwipo-si areas showed better quality than fruits from other harvested areas.
고정삼,양상호,양영택,좌창숙 ( Jeong Sam Koh,Sang Ho Yang,Young Tack Yang,Chang Sook Jwa ) 한국응용생명화학회 1998 Applied Biological Chemistry (Appl Biol Chem) Vol.41 No.2
In order to determine the optimmum harvest time of Citrus unshiu Marc. var. miyagawa and C. unshiu Marc. var. okitsu produced in Cheju, citrus fruits sampled at packing houses or harvested directly on citrus tree in south and north area of Cheju were analyzed. The fruits were grown in size till middle of October, and soluble solids were increased continuously after that. The fruits size were different by positional directions on the tree, the quality of citrus fruits in central southern positions on the tree was good for fresh fruit consumptions. Compared with only the quality of citrus fruits as a factor of soluble solids, total sugar, pH, and color index, the optimum harvest time were supposed to be reasonable at late of November for C. unshiu Marc. var. okitsu, and at early of December for C. unshiu Marc. var. miyagawa. The results obtained from citrus fruits sampled at packing houses were supposed to be not suitable for determing the optimum harvest time, because of storage after harvest at ordinary harvesting time.
추출조건에 따른 탐라오갈피 진액(Extract) 의 제조와 그 성분조성
고정삼,좌창숙,양영택 한국농화학회 2001 Applied Biological Chemistry (Appl Biol Chem) Vol.44 No.1
Extracts of Acanthopanax koreanum Nakai were decreased as the ethanol concentration was increased, but eleutherosides were increased. Extracts were increased as the extraction time was prolonged. Compared to 15 hrs extraction, extract yield and eleutherosides for 5 hrs extraction were 90.6% and 96%, respectively. Yields of extract and eleutherosides were 6.5% and 75% at 100℃. The optimum extraction conditions were obtained from the samples of 4 years' tree harvested at September, which were water and 50% ethanol as solvents, and 90℃ for 5 hrs extraction. Soluble solids, minerals, free sugars, free acids, free amino acids and total eleuthersides in the extract of Acanthopanax koreanum were 48.2∼47.4%, 4.5∼5.3%, 11.27∼11.80%, 3.02∼3.18%, 185.33 ㎎/100 g∼348.14 ㎎/100 g and 990.84 ㎎/100 g∼1,416.10 ㎎/100 g, respectively. The extract was viscous and yellowish brown liquid.
섬오갈피의 수확시기와 부위에 따른 유리당 , 유기산 , 아미노산 , 무기물의 함량 변화
고정삼,양영택,좌창숙 한국농화학회 2000 Applied Biological Chemistry (Appl Biol Chem) Vol.43 No.2
In order to determine the optimum harvest time of Acanthopanax koreanum Nakai, free sugars, organic acids, amino acids and minerals were investigated. Ash, crude fat and crude protein of 4-age's tree of Acanthopanax koreanum were 2.98%∼3.90%, 1.93%∼2.34%, 3.52%∼4.23%, respectively. Minerals were 835.9 ㎎/100 g of K, 971.3 ㎎/100 g of Ca, 168.7 ㎎/100 g of Mg, 38.8 ㎎/100 g of Na, 18.6 ㎎/100 g of Fe, and 8.5 ㎎/100 g of Cu on average, respectively. Calcium content was increased distinguishably as late as harvest time, especially in stem and root. Glucose, fructose and sucrose content of stem were 0.71∼0.75%, 0.31∼0.03%, and 0.16∼0.21%, respectively. Organic acid was 381.0 ㎎/100 g∼504.9 ㎎/100 g, and was mainly consisted of succinic acid, citric acid and malic acid. Twelve kinds of free amino acids were detected. Total amino acids was 33.56 ㎎/100g∼48.60 ㎎/100 g, and it was the highest on samples harvested at September. Arginine, phenylalanine and glutamic acid were the main free amino acids of stems.