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치주염의 원인균 및 정상상주균간의 길항기전 규명 및 치주치료에의 응용
손성희,정종평,김각균,김강주 대한구강생물학회 1991 International Journal of Oral Biology Vol.15 No.1
It has been reported that microbial distribution and colonization in oral cavity have a relation to antagonism, synergism or symbiosis among microorganisms and bacterial antagonism have a relation to bacteriocin, hydrogen peroxide and bacterial metabolic end-products. The purpose of this study is to investigate on the in vivo and in vitro ecological interrelation and to detect the growth inhibition subatance and to clarify the antagonistic mechanism of the periodontopathic bacteria. In vivo ecological interrelation was studied by bacterial isolation & identification and in vitro ecological was studied by stab culture method. Bacteriocin-like substance was examined, purified, electrophoresed, and stained with silver stain. After the producer microorganism was cultured in various conditions, the pH & bacterial end-products of it was examined and the susceptibility of indicator bacteria by pH was measured. The presence of plasmid DNA was investigated by hot-boiling method. In in vivo ecologic interrelationship, Actinobacillus actinomycetemcomitans(Aa) was not isolated, black-pig-mented Bacteroides was less in the presence of Actinomyces species than in the absence of it in refractory periodontitis. In in vitro ecologic interlationship, S. mutans showed strong growth inhibitory activity against Porphyromonas gingivalis and Aa strains and more strong growth inhibitory activity against Aa Korean isolates than S. sanguis. After bacteriocin-like substance was examined, purified, electrophoresed, and stained with silver stain, a band was appeared whose molecular weight was 36 kd, pH and the production rate of lactic acid was varied according to the presence and absence of oxygen and glucose. These results suggested that there exists in vivo and in vitro growth inhibition among oral microorganisms and growth inhibition was affected by bacteriocin-like substance, pH and bacterial end-products of producer strains and sensitivity of indicator strains. Animal study is needed by using strains of growth inhibition and growth inhibitory substance.
한국어 학습자의 성취목표지향성과 자기조절학습 관계 분석
손성희,전나영 국제한국어교육학회 2014 한국어 교육 Vol.25 No.2
Shon Sung-Hee & Jeon Na-Young. 2014. An Analysis of the Relationship between Achievement Goal Orientation and Self- Regulation Study among Students of the Korean Language. Journal of Korean Language Education 25-2: 61-77. The purpose of the study is to examine the relationship between achievement goal and self-regulation study among students of the Korean language. Based on the questionnaire for the total of 1091 students of the Korean language, the regression analysis using the SPSS shows that there is a statistically significant relationship between achievement goal and self-regulation study. Especially it is found that master-approach achievement goals have the greatest effect on self-regulation study and, furthermore, on motivational-regulation study within selfregulation study. This suggests that the students who pursue Korean language studies for capability-enhancing purposes are apt to perform challenging tasks and then to reinforce their self-utility in their studies.