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Huang, Yao-Ge,Li, Xiang-Gao,Yang, Ji-Xiang,Kuang, Ya-Lan,Yan, Jie-Kun,Cui, Shu-Yu,Liu, Ren-Song,Kim, Hack-Seang The Korean Society of Ginseng 1996 Journal of Ginseng Research Vol.20 No.3
Dynamic parameters of physiology including embryo ratio (ER), embryo length to endosperm length, dry weight ratio between embryo and endosperm (DWR) and respiration rate (RR) in American send (Panax quinquefolium L.) seed were investigated. According to the changes of ER during seed stratification, the duration of embryo afterripening could be divided into three stages as \circled1 embryo slow growth stage (ESGS), ER increased from 7.31% to 20.48% (0.16% day-1): \circled2 embryo rapid growth stage (ERGS), ER increased to 80.98% (0.61% day-1) (75G5+ ERGS=morphological afterripening stage (MP,5)) and \circled3pysiological afterripening stage (PAS), ER Increased to 88.50% (0.094 day-1) only. DWR Increased slowly from 0.20% to 2.76clp (0.016% day-1) in MAS and rapidly to 8.81% (0.061% day-1) in PAS. The RR correlated significantly with ER as well (r=0.8934 > rot, 0.6610). The steep increment of both DWR and RR in PAS indicated that the PAS was not a static stage although the ER was not changed too much. All of these may provide some information for understanding the dormancy mechanisms of American sting seed.
Cytotoxic activities of various fractions extracted from some pharmaceutical insect relatives
Huang, Yao-Ge,Kang, Jong-Koo,Liu, Ren-Song,Oh, Ki-Wan,Nam, Chun-Ja,Kim, Hack-Seang The Pharmaceutical Society of Korea 1997 Archives of Pharmacal Research Vol.20 No.2
This research was performed to screen the cytotoxic activities of some pharmaceutical insect relatives. Cytotoxic activities of total extract and fractions of hexane, ethyl acetate, methanol, water and boiling water were extracted from four pharmaceutical insect relatives: the Chinese gall, the cicada slough, the hornet nest and the batryticated silkworm. These extracts were investigated against the cancer cell lines of L1210, P388 and SNU-1 in vitro tests. Results showed that, ED, , against the cancer cell lines of L1210, P388 and SNU-1 were 0.55, 0.50, and $0.83{\mu}g/ml$ in the ethyl acetate fraction from the Chinese gall; 1.07, 2.19, and $2.24{\mu}g/ml$in the ethyl acetate fraction, 1.51, 1.26, and $1.45{\mu}g/ml$ in the water fraction and 1.48, 2.29, and $1.29{\mu}g/ml$in the boiling water fraction from the cicada slough; 3.31, 2.00, and $6.61\mug/ml$ in the water fraction from the hornet nest and 13.80, 19.95, and $31.62{\mu}g/ml$in the hexane fraction and 33.88, 21.88, and $25.12{\mu}g/ml$in the ethyl acetate fraction from the batryticated silkworm, respectively. All of the fractions mentioned above showed high cytotoxic activities and could be suggested for further studies in vivo tests.
Study on Dormancy Mechanisms of American Ginseng Seed II - Germination Inhibition of Seed Coat
Huang, Yao-Ge,Li, Xiang-Gao,Cui, Shu-Yu,Yang, Ji-Xiang,Liu, Ren-Song,Kim, Hack-Seang The Korean Society of Pharmacognosy 1996 Natural Product Sciences Vol.2 No.2
This paper gives a description about the germination inhibition of American ginseng (Panax quinquefolium L.) seed coat. The existence of seed coat is one of the inhibitory factors which inhibit the embryo growth, particularly during the morphological after-ripening stage. The seed coat can obstruct the water absorption at the beginning of seed stratification, but it can not threaten seed germination. The inhibition of seed coat is not caused by the mechanical fetter neither. However, before splitting the seed coat, the inhibition of seed coat comes from both air-tight character and inhibitors, and after splitting the seed coat, the inhibition may come mainly from the inhibitors.
충적과정중 미국인삼 종자의 생리 및 생화학적 지표에 관한 동태학적 연구 I
Huang, Yao-Ge,Li, Xiang-Gao,Cui, Shu-Yu,Yu, Wen-Bo,Kuang, Ya-Lan,Yan, Jie-kun,Yang, Ji-Xiang,Liu, Ren-Song,Kim, Hack-Seang The Korean Society of Ginseng 1997 Journal of Ginseng Research Vol.21 No.1
Dynamic parameters of biochemistry including the contents of soluble carbohydrate (SC) , crude fat (CF) , fatty arid (FA) and soluble protein (SP) in American send (Panax qufnquelolium L.) seed are reported in the present paper. When embryo ratio (ER) increased from 7.31 to 20.48%, the SC content decreased from 4.08 to 1.16%. After that, SC content changed little. The CF content decreased successively from 34.50 to 14.40% from the beginning to the end during the embryo afterripening. The changes of FA content did not correlate with that of ER and the changing range of SP content was not large during the seed stratification. All of these may provide some information for understanding the dormancy mechanisms of American seng seed.