• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.02a
• /
• pp.596-596
• /
• 2013

본 연구에서는 Carbon nanotube 용액을 brush-painting 시스템을 이용하여 유연성 있는 PET 기판 위에 고품위의 플렉시블 투명전극을 제작하였다. CNT 박막의 두께에 따른 특성을 알아보기 위해 brushing 횟수를 증가시켜 UV/Vis Spectrometry, four-point probe 및 Hall measurement를 이용하여 전기적, 광학적특성을 알아보았다. 최적조건인 bilayer의 CNT 박막은 244 Ohm/sq.의 면 저항과 550 nm에서 68％의 투과도를 얻을 수 있었다. CNT 박막의 기계적 응력에 따른 전기적 안정성을 알아보기 위해 bending test를 진행하였다. 10,000번 구부려도 저항의 변화가 거의 없어 이 박막이 플렉시블한 소자에 적합하다는 것을 알았다. 유기태양전지의 적용 가능성을 알아보기 위해 CNT 박막을 유기태양전지의 anode 층으로 적용하여 1.6％ (VOC: 0.566(V), $J_{SC}$: 7.118(mA/$cm^2$), Fill Factor: 40.49(％))의 효율을 얻어 유기태양전지 소자의 적용 가능성을 알았다. 최종적으로 실험에서 성막된 CNT 박막은 기존의 CVD공정과 같은 복잡한 공정 대신에 쉽고 간편하게 고품위의 flexible brush-painting Carbon nanotube (CNT) 투명전극을 제작 하여 플렉시블한 유기태양전지 소자의 가능성을 알아보았다.

• Journal of Microbiology and Biotechnology
• /
• v.12 no.6
• /
• pp.993-997
• /
• 2002

A glucanhydrolase (a DXAMase exhibiting both dextranolytic and amylolytic activities) from Lipomyces starkeyi KSM 22 hydrolyzed polysaccharides having ${\alpha}-(1{\rightarrow}3)-,\;{\alpha}(1{\rightarrow}4)-,\;and\;{\alpha}-(1{\rightarrow}6)$-D-glucosidic linkages. The oral hygiene benefits of DXAMase-containing mouthwash were examined in relation to human experimental gingivitis during a 3-week period without brushing. The DXAMase-treated group exhibited a lower increase in plaque accumulation and gingival index score than the chlorhexidine-treated group. The DXAMase-treated group also showed less tongue accumulation, bad taste, and tooth staining, thus indicating a positive role for DXAMase as an antiplaque agent ingredient.

• Journal of dental hygiene science
• /
• v.17 no.3
• /
• pp.257-266
• /
• 2017

This study investigated factors affecting the subjective experience of oral symptoms among 2,285 elementary school students in the fourth and sixth grades using the Korean survey on the Health of Youth and Children in 2010. After conducting chi-square and Mann-Whitney U tests, we performed multiple logistic regression analysis to determine the factors affecting children's experience of oral symptoms. We found that the factors most frequently associated with the subjective experience of more oral symptoms were lower tooth brushing frequency, greater intake of foods that cause dental caries, higher stress levels, and lower levels of support from friends. In conclusion, determinants of children's oral health, such as children's oral health behaviors and psychological factors must be considered in a multifaceted approach to developing programs to promote oral health among children.

• The Korean Journal of Cytopathology
• /
• v.6 no.2
• /
• pp.214-218
• /
• 1995

Cytopathologic findings of two cases of adenoid cystic carcinoma of the trachea are reported. The carcinomas grew as an intratracheal mass. By bronchial washing, brushing and/or post-bronchoscopic sputum cytology, large cohesive sheets, lobulated clusters, or three dimensional ball-like structures were obtained. They had numerous cyst-like spaces containing characteristic globular basophilic material. The tumor cells were uniform and had a small amount of cytoplasm. Nuclei were small and hyperchromatic, Nucleoli were occasionally observed. The cytological diagnosis was confirmed by bronchoscopic biopsies. Since the cytomorphology of adenoid cystic carcinoma is characteristic, review of these cytologic features will enhance the diagnostic accuracy in exfoliative cytology of the respiratory tract.

• Annals of Clinical Neurophysiology
• /
• v.7 no.1
• /
• pp.34-36
• /
• 2005

Two hemiplegic cerebral palsy patients were studied to investigate the cortical mechanisms underlying preserved somatosensory capacity, using functional MRI(fMRI). Tactile stimulation was performed by brushing of palm, during fMRI study. By the affected hand stimulation, contralateral primary somatosensory cortex was activated in patient 1 and cortical area anterior to the lesion site was activated in patient 2. We suggest that reorganization of the somatosensory cortex after brain injury can be induced by recruitment of undamaged areas adjacent to lesion site.

• Journal of Korean society of Dental Hygiene
• /
• v.14 no.4
• /
• pp.571-576
• /
• 2014

Objectives : The purpose of this study was to investigate the relationship between early childhood caries(ECC) and breastfeeding. Methods : Data of 670 children were derived from the Forth Korean National Health and Nutrition Examination Survey from 2007 to 2009. Demographic and socioeconomic data, oral health related behavior, and breastfeeding practice data were collected as independent variables. The ECC was used as a dependent variable. The chi-square test and logistic regression analysis were performed to identify the relationship between ECC and the other variables. Results : Multiple logistic regression analysis revealed that ECC was related with age, tooth brushing frequency, and breastfeeding practice. Conclusions : This study confirmed various risk indicators of ECC in Korean children, using Korean national survey data. Parents should begin an early and consistent mouth care regime to decrease the risk of ECC.

• Journal of Korean society of Dental Hygiene
• /
• v.16 no.5
• /
• pp.669-676
• /
• 2016

Objectives: The purpose of the study was to investigate the related factors of scaling experience of multi-cultural adolescents in Korea. Methods: The subjects were 698 multi-cultural adolescents from web-based survey of the 11th(2015) Korean Youth Risk Behavior. Multi-cultural adolescents are defined as the children of marriage migrant women. The study instruments included demographical characteristics of the subjects, oral health behaviors, daily tooth brushing times, health behaviors, and experience of smoking and alcohol consumption. Data were analyzed using PASW statistics 18.0. Results: The experience rate of scaling was 18.8%. Multiple logistic regression analysis revealed that experience of scaling were related with experiences of sealant and fruit consumption. Conclusions: It is very important to provide the continuing oral health prevention program for the adolescents and investigate the cost-benefit effectiveness of oral health care program.

• Journal of Korean Medical classics
• /
• v.28 no.4
• /
• pp.65-77
• /
• 2015

Objectives : This literature study about dental external treatments from Hyangyakjibsungbang Tooth will invigorate applying the therapeutics in the field of Dentistry. Methods : In this study, the parts related to external treatment in the original text of Hyangyakjibsungbang Tooth were reviewed. Results : Examples of frequently used external method were gargling, applying powder, and brushing one's tooth. These methods are still used in modern dental treatment. Conclusions : Discovering new herbal medicines that provide better effects and developing more precise external treatments will advance dental treatment in Korean medicine.

• Journal of the Semiconductor & Display Technology
• /
• v.2 no.4
• /
• pp.27-30
• /
• 2003

The effect of fabrication method of catalytic layer on electrode performance has been investigated. Brush, spray gun and screen printer were used as fabrication tool and catalytic layers were formed by several methods in screen printing. Direct screen printing on polymer membrane, screen printing on carbon paper, and their combined method were applied. In the electrode fabricated by the screen printing method, Pt loading of Pt/C catalysts could be cut down to 50%, compared with results by the brushing and spraying methods. The best result of electrode was obtained as 0.6 V, at 1 A/$\textrm{cm}^2$ when catalytic layer was formed by the combined way.

• Journal of Oral Medicine and Pain
• /
• v.23 no.3
• /
• pp.263-270
• /
• 1998

Considering various factors contributing oral malodor, the accurate prediction of prognosis is very important to both clinician and patients. The present study has been performed to invetigate the relationship between treatment effeicacy and pre-treatment volatile sulfur compounds (VSC) level. Ninety patients were divided into three groups, A(<150ppb), B(150< <200ppb), and C(>200ppb) groups, according to pre-treatment VSC level detected by Halimeter, and each group included 30 patients. Routine therapeutic measures for oral were provided to each patient which consisted of oral prophylaxis, tooth brushing and flossing instruction, tongue scraping by proper device, and gargling of 0.25% ZnCl2 Solution. The group with high pre-treatment VSC level (>150ppb) showed significant reduction of VSC level at 1 and 3 weeks after. However, the group with low pre-treatment VSC level (<150ppb) did not show any significant reduction during the experimental periods. Collectively, the results suggested that patients with high pre-treatment VSC level show better prognosis.