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Dental Plaque Streptococci가 생산하는 세포외 다당류에 관한 연구
정태영,Chung, Tai-Young 대한치과의사협회 1971 대한치과의사협회지 Vol.9 No.12
This report was concerned with the isolation and identification of bacterial flora in the human dental plaque and the dextransucrase activity of isolated species. The results were obtained as follows: 1. The bacterial flora, isolated from the human dental plaque, was identified as 3 species of resembling streptococci, Streptococcus salivarius strain SD-1, Streptococcus bacilli, Lactobacillus brevis strain SD-3, Lactobacillus acidophilus strain SD-2 and SD-7, resembling Staphylococcus sp, and one species of resembling Leuconostoc mesenteroides strain SD-6. 2. The dextransucrase activites of resembling Streptococcus mitis strain SD-9 and Streptococcus salivarius strain SD-1 were exhibited the highest among the isolated species of human dental plaque.
高溫環境이 反芻家畜의 체온 및 혈장 Cortisol 농도에 미치는 影響
정태영,양영직,이상락,윤희섭,Chung, Tae-Young,Yang, Young-Jik,Lee, Sang-Rak,Yoon, Hee-Sup 한국축산환경학회 1995 축산시설환경학회지 Vol.1 No.1
Temperatures of blood and skin, respiratory rate and plasma cortisol concentration in sheep at a warm (average ambient temperature of $15.3^{\circ}C$) and a hot (average ambient temperature of $27.0^{\circ}C$ environment were measured to investigate the effect of hot environment on the physiological responses in ruminant. Temperatures of core, mean skin and mean body in sheep were tended to increase at day time and to decrease at night time at both warm and hot environment, while 24-hr average for those temperatures were significantly higher at hot environment than at warm environment (P<0.05). The calculated body heat content was higher in sheep at hot environment than at warm environment (P<0.05). Respiratory rate and plasma cortisol concentration had no significant differences between warm and hot environment, suggesting that sheep were not stress by the hot environment in this experiment. It is, therefore, suggested that sheep were well adopted to hot environment by increasing body heat content against heat stress.
진달래꽃으로부터 분리된 플라보노이드 화합물의 항산화성에 관한 연구
정태영(Tae Yung Chung),김미애(Mi Ae Kim),(A . Daniel Jones) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.4
Seven antioxidative flavonoids were isolated from Jindalrae flowers (Rhododendron mucronulatum Turcz.), an edible plant in Korea. These compounds were identified as afzelin, ampelopsin, catechin, myricetin, myricitrin, quercetin and quercitrin on the basis of IR, UV, FAB-MS, ¹H NMR, and ^(13)C NMR data. These compounds were consisted of two flavonols, three flavonol glycosides, a flavane, and a dihydroflavonol. The flavonol glycosides (14.4 g) present in both ethyl ether and ethyl acetate fractions comprised up to 82% of their total flavonoid amount (17.6 g) finally recovered by means of polyamide C-200 column chromatography. preparative TLC, recrystallization, and Sephadex LH-20 column chromatography. The antioxidant activities were measured in an ethanol solution of linoleic acid in the presence of ferric thiocyanate. The antioxidant efficiency increased in the order of afzelin$lt;α-tocopherol$lt;catechin$lt;quercitrin$lt;quercetin$lt;myricitrin$lt;ampelopsin$lt;myricetin.