• 대한미생물학회지
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• 제6권1호
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• pp.29-40
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• 1971

Various kinds of antibiotics are generally believed to have inhibitory effects on the antibody response. However, as polymyxin B which belongs to the cyclic polypeptide group of antibiotic was found to have some enhancing effects on the antibody response of rabbits to enterobacterial common antigen(CA) under specified conditions, experiments were carried out on this problem with the following results. 1. When mixture of polymyxin B and CA derived from Salmonella typhimurium(STM) was treated 30 minutes at $37^{\circ}C$ and injected three times into rabbits by intravenous route, the antibody response to CA was weaker than rabbits injected CA only. 2. Mixture of polymyxin B and CA showed a marked antibody production when injected into rabbits primed with small amounts of heat-extracted antigen of STM, while the injection of CA alone showed low titers of response. 3. Mixture of polymyxin B and heat-extracted CA-containing antigen of Escherichia coli 014 also showed a increased antibody production than CA alone in rabbits primed with antigen of STM. 4. The effect of polymyxin B appeared in different ways. This antibiotic did not enhance the CA antibody response in rabbits primed with small amounts of E. coli 0111 and 055, but enhance in rabbits primed with Shigella flexneri. 5. No enhancing effect on the antibody response was observed by polymyxin B in rabbits primed with CA. 6. No enhancing effect on the antibody response was also noted in rabbits primed with STM antigen in case polymyxin B and CA were administered simultaneously but in veins of different places. 7. Bacitracin did not enhance the CA antibody response in primed rabbits with STM antigen, but neomycin slightly enhance the response. 8. Lipopolysaccharide showed no priming effect on the CA antibody response, and no enhancement of the CA antibody response in rabbits printed with STM. 9. The priming effect of STM antigen against CA antibody response was very weak as compared with the effect of CA derived from STM antigen.

• 대기
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• 제27권4호
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• pp.385-398
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• 2017

Numerical weather prediction experiments were carried out by applying topographic effects to reduce or enhance the solar radiation by terrain. In this study, x and ${\kappa}({\phi}_o,\;{\theta}_o)$ are precalculated for topographic effect on high resolution numerical weather prediction (NWP) with 1 km spatial resolution, and meteorological variables are analyzed through the numerical experiments. For the numerical simulations, cases were selected in winter (CASE 1) and summer (CASE 2). In the CASE 2, topographic effect was observed on the southward surface to enhance the solar energy reaching the surface, and enhance surface temperature and temperature at 2 m. Especially, the surface temperature is changed sensitively due to the change of the solar energy on the surface, but the change of the precipitation is difficult to match of topographic effect. As a result of the verification using Korea Meteorological Administration (KMA) Automated Weather System (AWS) data on Seoul metropolitan area, the topographic effect is very weak in the winter case. In the CASE 1, the improvement of accuracy was numerically confirmed by decreasing the bias and RMSE (Root mean square error) of temperature at 2 m, wind speed at 10 m and relative humidity. However, the accuracy of rainfall prediction (Threat score (TS), BIAS, equitable threat score (ETS)) with topographic effect is decreased compared to without topographic effect. It is analyzed that the topographic effect improves the solar radiation on surface and affect the enhancements of surface temperature, 2 meter temperature, wind speed, and PBL height.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.822-827
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• 2009

Recently, a large amount of budget was invested in improving the railway tracks(double tracking, route improvement) of Janghang and Jungang line. However, further action to enhance the investment effect has been needed because the desired effect have not been obtained. This study was designed to evaluate the effect of track improvement briefly by examining the project summary of Janghang and Jungang line railway line improvement and analysing the change of the transport performance and revenue. The results of this study can be applied not only to establish an operation plan for maximizing the revenue of rail operation also to enhance an effect of track improvement.

• Asian-Australasian Journal of Animal Sciences
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• 제12권6호
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• pp.956-965
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• 1999

Genetic selection and sophisticated management technology have produced modern sows which excel in litter size and milk production. Recent research has identified nutritional innovations which may enhance productivity of the high producing sow. Selected research in three areas which have the potential to enhance reproductive performance are summarized in this report. First, preliminary evidence indicates that organic chromium may enhance litter size and conception rate. Secondly, high producing sows, particularly primiparous sows, required higher protein/lysine in late gestation and or lactation to optimize weaning weight and subsequent litter size. Valine and isoleucine, but not leucine, have been shown to enhance milk production. Phased feeding programs with diet cost partitioned toward gilts and away form parity 3 to 8 sows have been suggested as a means of improving reproductive performance in young sows. Lastly, recent research with sufficient sow numbers to document the effect of dietary fiber on reproductive performance has shown that sows fed fiber farrowed and weaned more pigs.

• 한국수학교육학회지시리즈A:수학교육
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• 제39권2호
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• pp.81-99
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• 2000

The Purpose of this study is to develop and implement an alternative secondary mathematics curriculum to enhance creative problem-solving abilities. The curriculum consisting of three main elements-content knowledge, process knowledge and creative thinking sills-as developed. Lessons were taught by a problem-based-learning method in an experimental group. In order to examine the effect of the curriculum, performance assessment was developed and used for pre and post.. There were significant group differences in the creative problem-solving abilities, so we could examine the effect of developed program and confirm the group differences in the attitude for lessons. But there were no significant group differences in motive for learning, a study skill and the achievement test.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 2003년도 Annual Meeting of KSAP : International Symposium on Pharmaceutical and Biomedical Sciences on Obesity
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• pp.66-66
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• 2003

Flavonoids are phenolic compounds widely distributed in wide variety of edible plants including leafy vegetables, fruits, beverages. Quercetin is one of bioflavonoid compounds and has anti-tumor effect by suppressing tumor growth in vitro and in vivo, including multiple biological effects by antioxidant and effective anti-inflammatory agent. The present study investigated whether quercetin can enhance antioxidant enzyme activities (glutathione peroxidase: GPX, superoxide dismutase : SOD, catalase: CAT) and intracellular reactive oxygen intermediate (ROI) levels in the presence of taurine on B16F10 murine melanoma cells. From this result, the antioxidant enzyme activities of quercetin in the presence of taurine was enhanced. In addition, the same treatments decreased intracellular reactive oxygen intermediate levels on B16F10 murine melanoma cells. Taken together, these results demonstrate that the antioxidant effect of quercetin can enhance in the presence of taurine and it might play an important role in anti-tumor effect.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 1999년도 봄 학술발표회 논문집
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• pp.49-52
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• 1999

• 보건의료산업학회지
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• 제10권2호
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• pp.133-144
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• 2016

Objectives : This study sought to identify the predisposing factors which influence the adolescent oral health enhancement behavior by analyzing controlling effects depending on the parents' oral health care behaviors in the relationship between the predisposing factors and adolescent behavior improvements which enhance oral health. Methods : A structured, self-administered questionnaire was given from July 6 through July 24, 2016. The collected data were analyzed with the SPSS 18.0 program. Results : Parents' oral health behaviors in terms of discipline and guidance showed a controlling effect in terms of importance (${\beta}$=.116) and benefits (${\beta}$=.133). In addition, the analysis showed that the parents' oral health care behavior had a controlling effect in terms of benefits (${\beta}$=.164) and susceptibility (${\beta}$=-.116). Conclusions : From the results of this study, the development of materials and education courses to lead to behavior changes are thought to be necessary in order to enhance the importance and benefits of the factors of oral health beliefs and to reduce psychological discomfort. Moreover, the role of parents with regard to desirable habits and beliefs to maintain oral health in their children is essential.

• 한국보육지원학회지
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• 제19권5호
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• pp.21-43
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• 2023

Objective: The purpose of this study is to reduce job stress among child care teachers and enhance the quality of child care by examining the mediating effect of job stress in the relationship between positive psychological capital and the organizational commitment of child care teachers. Methods: The subjects of this study were 560 childcare teachers in Gyeonggi-do, and 465 questionnaires were ultimately analyzed. Descriptive statistics, correlation analysis, multiple regression analysis, and structural equation model were analyzed using SPSS 23.0 and AMOS 23.0. Results: As a result of the study, first, positive psychological capital of childcare teachers showed a positive correlation with organizational commitment. Additionally, both positive psychological capital and organizational commitment showed a negative correlation with job stress. Second, the direct effect of childcare teachers' positive psychological capital affecting organizational commitment was significant, and the direct effect of job stress affecting organizational commitment was also significant. It was found that positive psychological capital of childcare teachers significantly influenced organizational commitment through job stress. Conclusion/Implications: Therefore, providing an educational program to help childcare teachers enhance their positive psychological capital and foster commitment to the organization can significantly contribute to the improvement of childcare quality.

• 한국산학기술학회논문지
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• 제20권1호
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• pp.248-258
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• 2019

본 연구는 유치원에서 자유선택활동을 실시하는 교사의 전문성 향상을 위해 셀프리더십과의 관계를 살펴보고, 교사 효능감에 대한 매개효과를 분석하는 데 목적이 있다. 본 연구는 2018년 9월 17일부터 28일까지 서울 경기 지역 유치원 교사 총 325명에게 방문 조사를 통해 설문을 실시한 자료를 사용하였다. 자료 분석을 위해 SPSS Statistics 22.0과 AMOS 20.0 통계프로그램을 사용하여, 신뢰성분석, 확인적 요인분석, 상관관계 분석, 구조방정식 모형을 실시하였다. 가설검증 결과, 자유선택활동을 교육하는 유치원 교사의 셀프리더십은 교사효능감에 정(+)의 영향을 미치는 것으로 나타났으며, 교사 전문성에도 정(+)의 영향을 미치는 것으로 나타났다. 또한 유치원 교사의 교사효능감도 교사의 전문성에 정(+)의 영향을 미치는 것으로 나타났다. 또한 유치원 교사의 셀프리더십이 교사효능감을 매개하여 교사 전문성에 간접효과가 통계적으로 유의하게 있는 것으로 나타났다. 또한 유치원 교사의 셀프리더십이 교사 전문성에 미치는 직접효과가 유의하게 나타났으며, 이는 유치원 교사의 교사효능감이 셀프리더십과 교사 전문성 간의 관계를 간접 매개함을 확인하였다. 본 연구의 결과를 통하여 유치원 교사의 전문성을 향상시키기 위해서는 교사의 셀프리더십을 강화하는 것은 물론이고, 교사들의 교사효능감 수준을 강화시키기 위해서는 업무환경에 대해 교사들에게 효능감을 높이기 위해 필요한 지식 및 기술 등을 제공하고 교사들의 전문성을 향상시키기 위한 적극적인 촉진자 및 조력자의 역할이 필요할 것이다.