http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Co/Mn/Br계 촉매상에서 p-자일렌 액상산화반응의 공정변수에 관한 연구
손용배,박경린,류태공,김정희,오인석,김영호,양현수 忠南大學校 産業技術硏究所 2001 산업기술연구논문집 Vol.16 No.2
Liquid phase oxidation of p-xylene using molecular oxygen has been carried out on the Co/Mn/Br-based catalyst system in acetic acid as a solvent. Process parameters(total pressure, partial pressure of oxygen and temperature) and kinetics of the reaction were studied as a basic study in the viewpoint for the development of new catalyst system and process. The total pressure above 20atm and the partial pressure of oxygen above 5atm were required to keep the reactant in the liquid phase and to overcome the mass transfer limitation of oxygen. The oxidation rate conversion were increased with increasing reaction temperature to the 100∼190℃ range. For a given initial concentration of p-xylene, the oxidation rate and the apparent activation energy were found to be of first-order and 4.24 ㎉/㏖, respectively. The effect of the third components added to the Co/Mn/Br catalyst was also studied. It was found that Ni is only a good additive that can promote the catalyst performance.
Correlation between Severity of Atopic Dermatitis and Sleep Quality in Children and Adults
( Tae Seok Kong ),( Tae Young Han ),( June Hyunkyung Lee ),( Sook Ja Son ) 대한피부과학회 2016 Annals of Dermatology Vol.28 No.3
Background: The atopic dermatitis (AD) can limit a patient’s physical and psychosocial development as well as lower their overall quality of life (QOL), including sleep quality. Objective: The purpose of this study was to evaluate the relationships between clinical disease severity, QOL and sleep quality in children and adults with AD. Methods: The SCORing atopic dermatitis (SCORAD) was examined to evaluate the severity of AD in fifty adult AD patients and 50 children AD patients. A questionnaire based on the children’s sleep habits questionnaire (CSHQ) and the children’s dermatology life quality index (CDLQI) were used to evaluate QOL and sleep disturbance in children AD patients. The Pittsburgh sleep quality index (PSQI) and dermatology life quality index (DLQI) were used in adult AD patients. Results: The SCORAD and CSHQ score, the SCORAD and CDLQI score and the CSHQ and CDLQI score demonstrated significant correlations. The SCORAD and PSQI score showed no significant correlation. However, there were significant correlations between the SCORAD and DLQI score and the PSQI and DLQI score. Conclusion: Increasing severity of AD affects sleep quality in child AD patients. In adults, even though the total score of the sleep questionnaire is not associated with the severity of AD, two components of sleep questionnaire are associated with the severity of AD. There is a significant correlation between sleep quality and QOL in both children and adults. Therefore, we suggest that evaluating the sleep quality as well as clinical severity of the disease is necessary in the management of AD patients. (Ann Dermatol 28(3) 321∼326, 2016)
( Tae Seok Kong ),( Tae Young Han ),( June Hyunkyung Lee ),( Sook Ja Son ) 한국피부장벽학회 2013 한국피부장벽학회지 Vol.15 No.2
Viral wart is a benign cutaneous and mucosal proliferation by human papillomavirus(HPV) infection that usually occurs largely in children and adolescent. HPV infection is associated with inoculation of virus into the epidermis by breaking in the epithelial barrier. However, the dysfunction of skin barrier in patients with viral wart is not well established. We focused on identification of the hygiene status and the skin barrier function of children and adolescent patients with viral wart. This study was conducted with fifty patients with palmoplantar viral warts and fifty normal control group. Compared with the control group, hygiene status of patient group was poor. Physical activities with barefoot were more observed in patient group. Underlying dermatologic diseases including hand or foot eczema did not show statistical difference between two groups, but hyperhidrosis was significantly higher in patient group. The values of the hydration, transepidermal water loss, and acidity of skin were significantly higher in patient group than normal control group. This study demonstrates that poor hygiene, physical activities with barefoot, hyperhidrosis, and dysfunction of skin barrier were associated with patients with viral wart. So, we consider that these conditions consequently increase the possibility of HPV infection.
( Tae Seok Kong ),( Seo Wan Kim ),( Tae Young Han ),( June Hyunkyung Lee ),( Sook Ja Son ),( Moon Sam Shin ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Patients of atopic dermatitis (AD) are highly susceptible to colonization by various bacteria, including staphylococcus aureus (S. aureus). Triclosan is a lypophilic chlorophenol biocide with broad-spectrum antibacterial activities. Objectives: The aims of this study were to assess the efficacy of a moisturizer containing triclosan compared with the moisturizer alone (vehicle) for the treatment of AD. Methods: In total, 30 patients with mild to moderate AD instructed to apply the study cream and vehicle on each antecubital fossa. Patients were assessed for severity according to the SCORAD. Skin barrier function was checked by corneometer, transepidermal water loss and acidity. S. aureus was sampled on each antecubital fossas using by contact-plate sampling technique. Results: Evaluation were performed at week 0 (baseline), 2nd and 4th. At week 2, there were significant decrease in SCORAD and improvement of skin barrier function from baseline for the study cream. And the number of S. aureus colonies was statistically decreased from baseline. At week 4, the severity of AD and skin barrier function were also improved with continuous using of study cream. And there was more decreased the colonization of S. aureus comparing with week 2. Conclusion: This study demonstrates that topical application of triclosan-containing moisturizer reduces the colonization of S. aureus of the patients with AD. Moreover, the severity of AD and skin barrier function were improved with treatment.
( Tae Seok Kong ),( Seo Wan Kim ),( Tae Young Han ),( June Hyunkyung Lee ),( Sook Ja Son ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Viral wart is a benign cutaneous and mucosal proliferation by human papillomavirus(HPV) infection that usually occurs largely in children and adolescent. HPV infection is associated with inoculation of virus into the epidermis by breaking in the epithelial barrier. However, the dysfunction of skin barrier in patients with viral wart is not well established. Objectives: We focused on identification of the hygiene status and the skin barrier function of children and adolescent patients with viral wart. Methods: This study was conducted with fifty patients with palmoplantar viral warts and fifty normal control group. Results: Compared with the control group, hygiene status of patient group was poor. Physical activities with barefoot were more observed in patient group. Underlying dermatologic diseases including hand or foot eczema did not show statistical difference between two groups, but hyperhidrosis was significantly higher in patient group. The values of the hydration, transepidermal water loss, and acidity of skin were significantly higher in patient group than normal control group. Conclusion: This study demonstrates that poor hygiene, physical activities with barefoot, hyperhidrosis, and dysfunction of skin barrier were associated with patients with viral wart. So, we consider that these conditions consequently increase the possibility of HPV infection.
( Tae Woong Kong ),( In Tae Kim ),( Tridib Kumar Sinha ),( Junho Moon ),( Dong Ho Kim ),( Inseon Kim ),( Kwangyong Na ),( Min-woo Kim ),( Hye-lin Kim ),( Taegyeong Hyeong ),( Jeong Seok Oh ) 한국고무학회 2020 엘라스토머 및 콤포지트 Vol.55 No.4
Stearic acid (SA), polyethylene glycol (PEG), and malic acid (MA) have been used to modify the surface of waste gypsum to develop corresponding poly (butylene adipate-co-terephthalate) (PBAT) composites. According to the mechanical properties, MA-treated gypsum (MA-gypsum) showed the best performance, whereas SA-gypsum showed the worst performance. In contrast to SA and PEG (having -COOH and -OH as polar functional groups, respectively), the presence of both -OH and -COOH in MA is responsible for the superior surface treatment of gypsum and its better dispersion in the polymer matrix (as revealed by FE-SEM analyses). The presence of long aliphatic chain in SA is supposed to inhibit the dispersion of SA-gypsum. Further, the performance of MA-gypsum/PBAT was enhanced by adding polylactic acid (PLA). The maximum optimized contents of MA-gypsum and PLA are 20 and 7.5 wt% for developing a high-performance PBAT composite.