• Journal of Korean Clinical Health Science
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• v.6 no.2
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• pp.1180-1188
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• 2018

Purpose. This study was to effects of major satisfaction of dental hygiene students and students on self-efficacy and career preparation behavior by investigation to provide basic data for developing a systematic career customized employment support program. Methods. The data were collected from 249 students from December 1 to 10 day 2016 in Yeongnam region. Data analysis was performed using descriptive statistics frequency, t-test(One-way ANOVA), logistic regression by SPSS WIN 18.0 program. Results. According to the general characteristics department dental hygiene students were major satisfied with 59.8%. Satisfaction with career decision self-efficacy and career preparation self-efficacy was found to $68.30{\pm}10.21$ statistically significant(p<.001). Satisfaction was also found to statistically significant ($32.65{\pm}6.05$) in career preparation behavior(p<.05). Satisfactory scores were found to 1.306 times higher than the dissatisfied students in the career decision self-efficacy goal setting. It was found that 8.423 times in satisfaction of career planning in career preparation. Conclusion. Considering the effects of dental hygiene students' major satisfaction on career decision self - efficacy and career preparation behavior, it would be good if we could develop and use various programs to improve the satisfaction of students in their majors.

• The Journal of Korean Society for School & Community Health Education
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• v.22 no.2
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• pp.93-104
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• 2021

Objectives: This study aims to understand the mediating effects of self-efficacy on the effects of social support on mental health and career preparation behavior of academic high school students. Methods: A survey was conducted targeting total 297 respondents from May 27 to May 30th 2019. The collected data was analyzed by using the PASW Statistics Ver. 18.0. Results: When the school life satisfaction was lower, and when the personality was more introverted, the students with lower school grade showed significantly low scores of mental health and career preparation behavior. In the effects of social support on mental health, the self-efficacy showed mediating roles. In the effects of social support on career preparation behavior, the self-efficacy showed mediating roles. Conclusion: If the education for strengthening social support is preferentially performed, the self-efficacy could be increased, which would have more positive effects on mental health and career preparation behavior. Regarding the subjects of education, t would be more effective to provide selective and concentrative education to the group with significantly low scores of mental health and career preparation behavior.

• The Journal of Advanced Prosthodontics
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• v.8 no.1
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• pp.30-36
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• 2016

PURPOSE. The aim of this study was to evaluate the fracture resistance and fracture behavior of monolithic zirconia crowns in accordance with the preparation design and aging simulation method. MATERIALS AND METHODS. An upper first molar was prepared sequentially with three different preparation designs: shoulderless preparation, 0.4 mm chamfer and 0.8 mm chamfer preparation. For each preparation design, 30 monolithic zirconia crowns were fabricated. After cementation on Cr-Co alloy dies, the following artificial aging procedures were performed: (1) thermal cycling and mechanical loading (TCML): 5000 cycles of thermal cycling $5^{\circ}C-55^{\circ}C$ and chewing simulation (1,200,000 cycles, 50 N); (2) Low Temperature Degradation simulation (LTD): autoclave treatment at $137^{\circ}C$, 2 bar for 3 hours and chewing simulation; and (3) no pre-treatment (control group). After artificial aging, the crowns were loaded until fracture. RESULTS. The mean values of fracture resistance varied between 3414 N (LTD; 0.8 mm chamfer preparation) and 5712 N (control group; shoulderless preparation). Two-way ANOVA analysis showed a significantly higher fracture loads for the shoulderless preparation, whereas no difference was found between the chamfer preparations. In contrast to TCML, after LTD simulation the fracture strength of monolithic zirconia crowns decreased significantly. CONCLUSION. The monolithic crowns tested in this study showed generally high fracture load values. Preparation design and LTD simulation had a significant influence on the fracture strength of monolithic zirconia crowns.

• BMB Reports
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• v.37 no.3
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• pp.356-361
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• 2004

To develop a simplified method that can rapidly prepare DNA microarray probes in a massive scale, a lambda phage genomic DNA-fragments library was constructed for the microarray-probes collection. Four methods of DNA band recovery from the first PCR products were tested and compared. The DNA microarray probes were collected by a novel method of nested PCR that was mediated by gel isolation of the first PCR products. This method was named GIN-PCR. The probes that were prepared by this GIN-PCR technique were used as subjects to fabricate a DNA microarray. The results showed that a wooden toothpick was superior to the other 3 methods, since this technique can steadily transfer the DNA bands as the template of the second PCR after the first PCR. A group of probes were successfully collected and DNA microarrays were constructed using these probes. Hybridization results demonstrated that this technique of DNA recovery and probe preparation was rapid, efficient, and effective. We developed a cost-effective and less labor-intensive method for DNA microarray probe preparation by nested PCR that is mediated by wooden toothpick transfer of the DNA bands in the gel after electrophoresis.

• The Korean Journal of Cytopathology
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• v.17 no.2
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• pp.108-115
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• 2006

Evaluation of serous effusions can include immunocytochemical stains that differentiate reactive mesothelial cell from adenocarcinoma cell. Among several positive mesothelial cell markers, we used desmin, CK5/6, WT1 and calretinin all known to have high sensitivity and specificity as selective mesothelial cell markers. We studied smears obtained with cytospin from 15 malignant and eight benign effusions. The mesothelial cells were positively stained by desmin, CK5/6, WT1 and calretinin in 60.9%, 29.1%, 26.7% and 56.5%, respectively among 8 benign and 15 malignant effusions; the adenocarcinoma cells were positively stained 6.7%, 13.3%, 1.0% and 0.0%, respectively among 15 malignant effusions. The percentage of positively stained mesothelial cells were somewhat lower for all antibodies compared to the results of previous studies. This was likely due to the differences in preparation methods and fixatives among studies. In conclusion, the use of desmin and calretinin were more valuable than CK5/6 and WT1 for distinguishing between reactive mesothelial cell and adenocarcinoma cells in serous effusion; however, choice of the proper preparation methods and fixatives are also important

• Journal of the Korean Society of Food Culture
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• v.11 no.1
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• pp.97-106
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• 1996

A literature on Korean rice cakes by ingredients and preparation methods was reviewed with published literatures in Korea from 1950 to 1995. The result were as followed; 1. The 46 volumes about preparation of Korean rice cakes were reported. There were 32 steamed (Jeung-byung), 6 pounded (Do-byung), 4 fried (Yu-jeon-byung), and 4 boiled Korean rice cakes (Kyung-Dan). This result showed that steamed Korean rice cake was the most frequently studied among any other kinds of Korean rice cakes. 2. The reports on preparation of Korean rice cakes were rare during $1950's{\sim} 1960's$. In 1970's, there were few papers about basic study for Korean rice cakes. And it was reached 8 volumes of steamed, each 1 volume of fried or boiled Korean rice cakes. From 1990's, the more scientific researches were progressed vigorously so reached 11 volumes till 1995 but it was limited to Solgi and Jeungpyun etc. This result shows that the experiment for Korean rice cake was not various. 3. The preceded studies for Korean rice cake were investigated to see texture, sensory, quality characteristic and effect of substitutes added to original ingredients.

• Journal of Korean Academy of Nursing
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• v.48 no.2
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• pp.154-166
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• 2018

Purpose: This study aimed to identify the actor and partner effects of health status, marital satisfaction, and self efficacy on retirement preparation in middle aged couples using the Actor-Partner Interdependence Model. Methods: Participants were 121 middle aged couples living in Seoul, Gyeonggi-do and Daegu City, Korea. All measures were self-administered. The collected data were analyzed using SPSS 20.0 and AMOS 20.0. Results: 1) Wife's self efficacy and marital satisfaction showed direct actor and partner effects on retirement preparation in middle aged couples. Wife's health status showed an indirect actor effect through wife's self efficacy and marital satisfaction on wife's retirement preparation, and showed an indirect partner effect through husband's self efficacy on husband's retirement preparation. 2) Husband's self efficacy and marital satisfaction showed only direct actor effect on retirement preparation. Health status among the husbands showed an indirect actor effect on husband's retirement preparation through their self efficacy and marital satisfaction, and an indirect partner effect through wife's marital satisfaction on wife's retirement preparation. 3) The actor effect size of health status on self efficacy and marital satisfaction was larger among husband's than wife's. Additionally, the partner effect size of health status on self efficacy and marital satisfaction was different between the two groups; however, the actor and partner effect size of self efficacy and marital satisfaction on retirement preparation was the same for husband and wife. Conclusion: The results of this study indicate that nursing intervention strategies for improving self efficacy and marital satisfaction are strongly needed to enhance retirement preparation of middle aged couples in Korean community.

• Journal of Animal Science and Technology
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• v.60 no.8
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• pp.20.1-20.4
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• 2018

Platelet rich plasma (PRP) is popularly used in the horse industry to enhance regeneration of tissue injury that has limitation of blood supply. This study aimed to compare the methods for platelet rich plasma preparation since they has not been established yet. Blood was collected from six horses and platelets were concentrated by three different methods (2-step centrifugation, separated centrifugation and separated centrifugation using histopaque). Concentrated blood was analyzed using Advia hematology systems. In the result, separated centrifugation with histopaque showed the significantly lower number of red blood cells than other groups. The 2-step centrifugation showed the significantly higher number of white blood cells than other groups, while it contained the highest concentration of red blood cells among three groups. In the 2-step centrifugation, separated centrifugation and separated centrifugation with histopaque, platelets were concentrated 4.5, 5.3 and 5.6 times, respectively. And no significant difference of the platelet concentration between the three groups was found. This study demonstrated that separated centrifugation using histopaque was the best method for platelet rich plasma preparation because of the proper amount of platelets and the separation of red blood cells from platelet rich plasma.

• Restorative Dentistry and Endodontics
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• v.22 no.1
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• pp.220-227
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• 1997

The purpose of our study is to evaluate the ability of nickel-titanium(NiTi) files in maintaining the original curvature of a curved root canal during canal preparation. Curved canals on translucent resin blocks were prepared with NiTi and stainless steel files, and they were placed at the platform which can reproduce the same position. The unprepared and prepared canal forms were accurately compared by double exposure technique of photography. By finite element methods we also analyzed stress distributions of NiTi and stainless steel files in a curved canal. The results were as follows : 1. NiTi files were excellent in maintaining the original curvature of a curved canal than stainless steel files after canal preparation. 2. The results of canal preparation with these files were well verified by the analysis of stress distributions using finite element methods.

• Journal of the Korean Society of Food Science and Nutrition
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• v.24 no.1
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• pp.133-140
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• 1995

This investigation was undertaken for the purpose of studying the changes of pectic substances in alcohol insoluble solids(AIS) extracted from cucumbers pickled in salt. The preparation methods were brining the cucumbers in 10% NaCl solution (bolied, method A), 20% NaCl solution(bolied, method B) and 20% NaCl solution(cool to $25^{\circ}C$ after boiling, method C). The composition ratio of hot water soluble pectin(HWSP) in AIS decreased during brining, while that of 0.4% sodium hexametaphosphate soluble pectin(NaSP) increased remarkably. The contents of Ca and Mg in AIS increased regardless of preparation methods used. By DEAE-cellulose chromatography, HWSP from fresh and brined cucumbers were divided into six fracitons. 0.2M peak was the main fraction in fresh cucumber, whereas 0.05M and 0.2M peak were the main fraction in pickled cucumbers. On the other hands, NaSP from fresh and brined cucumbers were divided into five fractions and 0.4M peak was the main fraction. However, the composition ratios of galacturonic acid and neutral sugar of 0.4M fraction in brined cucumbers were higher than those of fresh cucumber.