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Yangwon Chae,Kwangsik Jang,Yesol Jo,Shamshik Shin,Sohi Kang,SeEun Kim,Kyung Mi Shim,Seong Soo Kang 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
Introduction Radio frequency technology has been developed as a noninvasive method to reduce subcutaneous fat. This study aimed to measure the safety and effectiveness of the radiofrequency fat reduction system (RF system). We evaluated the efficiency of heat transfer to the subcutaneous layer by using ex vivo model. And then, we tried to verify the safety of the RF system by measuring skin surface temperature changes and the effectiveness by evaluating histological changes in subcutaneous lipocytes in pigs. Materials & Methods The RF system was developed and manufactured by PolyBioTech co., Ltd., Gwangju, Republic of Korea. In ex vivo model, fresh pork containing skin, subcutaneous, and muscle layer was treated with the RF system at 43℃ or 40℃ for 15 minutes. The temperature changes in the cut section of the pork were measured during treatment. In in vivo model, a dorsal skin of pig was also treated with the RF system at 45℃ for 30 minutes. The skin surface temperature of the pig was measured before and after treatment. Moreover, the treated sites were biopsied and evaluated histologically immediately, 1 day, and 7 days after treatment. Results In ex vivo model, the skin surface temperature of the pork did not exceed the set temperature value for most of the treatment time. And as the treatment time progressed, the heat gradually transferred to the deep layer. In in vivo model, the skin surface temperature of the pig remained below the set for the entire treatment time. In histological evaluation, no skin damage was observed and the sizes of subcutaneous lipocytes in pigs had shrunken by 27.87% immediately after, 30.83% 1 day after, and 34.81% 7 days after treatment. Conclusion The RF system used in this study effectively reduced subcutaneous fat without side effects such as skin damage. Based on this, it is expected that safe and effective use of this system will be possible for non-invasive fat reduction.
Successful Surgical Treatment of Severe Lower Lip Avulsion in Two Cats
Kwangsik Jang,Yangwon Chae,Euisin Yang,조현민,Kyung Mi Shim,Chun-Sik Bae,강성수,김세은 한국임상수의학회 2022 한국임상수의학회지 Vol.39 No.5
Two Korean short-haired cats were admitted to the Veterinary Med- ical Teaching Hospital, Chonnam National University, with severe lower lip avulsion. In the first case, the treatment was performed using the tension-free suture technique with rubber tube stents. The second case was treated using the tension-free suture technique with rubber tube stents for lip avulsion and using the cerclage wiring technique for alveolar fracture. The teeth around the alveolar fracture were extracted and bone graft and collagen membrane were applied at the alveolar fracture site to stabilize the mandibular alveolar fracture. Thereafter, the cerclage wire was placed circumferentially around the mandible. In both cases, normal function of the oral cavity was successfully recovered by repairing the anatomic abnormality. In conclusion, tension-free suture technique can be a treatment option for bilateral lower lip avulsion in cats.
죽탄 및 죽초액 제조를 위한 인도네시아산 및 국내산 대나무의 탄화특성 비교 연구
Yang, Won,Kim, Hui-Yeol,Chae, Tae-Young,Ibik, K.,Pohan, H.G. 한국연소학회 2010 한국연소학회지 Vol.15 No.1
Carbonization characteristics of Indonesian bamboos were investigated using lab-scale tube furnace, in order to find optimum design temperature of a carbonizer for producing bamboo charcoal and vinegar. The bamboo samples used in this study are local bamboos from Damyang in Korea, Andong and Petung in Indonesia. Correlation of electric resistance, specific surface area and pH of bamboo vinegar with pyrolysis temperature has been investigated. Electric resistance of the charcoal increased for higher pyrolysis temperature the specific surface area was also increased as carbonization temperature got higher. Charcoal which has specific surface area of over $300\;m^2/g$ could be produced at $700^{\circ}C$. pH of bamboo vinegar was decreased for highter carbonization temperature and vinegar under pH 3 could be produced for all bamboo samples. In this experimental condition, it was found that lower carbonization temperature is better for producing bamboo vinegar of high quality, while higher temperature is better for obtaining bamboo charcoal with larger surface.