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한대희,김성구,박상호,김성한,조원영,방덕원,조윤행,정의룡,은영근,권영구 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.1
Background : Patients with chronic renal fialure have a substantially elevated risk of death from cardiovascular diseases than do the general population. the patients with chronic renal failure are at significantly increased freqeuncy of hypertension, hyperlipidemia, and diabetes mellitus which are known to the risk factors of the coronary artery diseases, and the prevalence of the coronary artery diseases in chronic renal failure patients is highly associated with the hemodynamic disorder and metabolic abnormalities. therefore we expected that the coronary angiographic findings in patients with chronic renal failure should be different from the general population (control groups) and investigated the risk factors contributing to coronary artery diseases. Method : we have retrospectively compared the coronary angiographic findings of 44 patients with chronic renal failure on hemodialysis with that of 88 patients in the general population and investigated the factors contributing to the development and acceleration of coronary artery diseases in patients with chronic renal failure Result : Hypertension and diabetes mellitus which is risk factors for coronary artery disease is significantly increased in patients with chronic renal failure, in coronary angiographic finding the severity of the lesion is worse. the incidence of PCI or CABG of patients with chronic renal failure is more than that of control group but statistically no difference between patients with chronic renal failure and control group. the sex, the duration of disease, the duration of dialysis, serum creatinine in patients with chronic renal failure have no correlation to the prevalence of coronary artery disease and severity of lesion. hyperglycemic patients with chronic renal failure have high incidence of coronary artery disease and are worse in the severity of lesion Conclusions : There is significantly increased the pevalence and severity of involving multiple coronary artery diseses in hyperglycemic patients with CRF.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
미세먼지 자극에 의한 저온숙성 선인장 열매 추출물의 생리활성 연구
조항의(Hang-Eui Cho),강정욱(Jung-Wook Kang),최순호(Soon-Ho Choi),차영권(Young-Kwon Cha),유단희(Dan-Hee Yoo),김소은(So-Eun Kim),김효민(Hyo-Min Kim),최호민(Ho-Min Choi),조미래(Mi-Rae Jo),김지영(Jee-Yong Kim),이인철(In-Chul Lee) 한국인체미용예술학회 2020 한국인체미용예술학회지 Vol.21 No.1
Air pollutants can trigger various disorders in humans and induce skin aging effects, related cell death, and inflammation. This study demonstrated the effects of low temperature-fermented Opuntia Ficus-Indica Fruit extracts (LTOE) treated total suspended particles (TSP). LTOE induced the expression of pro-inflammatory cytokines such as tumor necrosis factor (TNF)-α, interleukin (IL)-8 without cytotoxicity. To investigate the anti-aging effect, LTOE inhibited the production of matrix metalloproteinase (MMP)-1 (collagenase) more than Opuntia Ficus-Indica Fruit extracts (OE) in TSP-treated Normal human fibroblast cells. This study reports the significant improvement of anti-inflammation and decrease of MMP-1 related to the LTOE, which will be helpful in processing cosmetic ingredients.
Improvement of Electrical and Thermal Characteristics of Nano-Micro Epoxy Composite
Cho, Sung-Hoon,Kim, Yu-Min,Kwon, Jung-Hun,Lim, Kee-Joe,Jung, Eui-Hwan,Lee, Hung-Kyu,Shin, Pan-Seok The Korean Institute of Electrical and Electronic 2011 Transactions on Electrical and Electronic Material Vol.12 No.4
Polymer nanocomposite has been attracting more attention as a new insulation material because homogeneous dispersion of nano-sized inorganic fillers can improve various properties significantly. In this paper, various kinds of epoxy-based nanocomposites were made, and the AC breakdown strengths of Nano filler and micro-$SiO_2$ filler mixtures of epoxy-based composites were analyzed using sphere-to-sphere electrodes. Moreover, nano- and microfiller combinations were investigated as an approach to practical application of nanocomposite insulation materials. Its composition ratio was 100 (resin):82 (hardener):1.5 (accelerator). AC breakdown tests were performed at room temperature ($25^{\circ}C$), $80^{\circ}C$, and $100^{\circ}C$ in the vicinity of $T_g$ ($90^{\circ}C$). Thermal conductivity was measured using TC-30.
실내 인테리어용 오크 무늬목의 산성염료 염색성 및 후가공 효과
조항성(Hang-sung Cho),심의진(Eui-jin Shim) 충북대학교 생활과학연구소 2022 생활과학연구논총 Vol.26 No.3
Background/Objectives: In this study, we compared and analyzed the dye ability of oak-patterned materials with acid dyes, and evaluated their performance as interior materials. Use of processed timber can help reduce environmental damage and the economic burden of resources (important problems with use of raw timber) and can meet the needs of various fields where the sensibility of raw timber is required. Veneer wood is positioned as a high-value-added product due to its luxury and beauty, and it is used in various fields as a building-related material, such as interior decoration, furniture, flooring, building interior materials, and lumber. Dyeing is necessary to enhance the aesthetic appearance of this pattern and to expand its use. Methods: As the wood used in the experiment, American red oak, which has marketability in the market, was selected. The spectral reflectance of each wavelength band was measured using spectrophotometer to evaluate the apparent concentration and dyeability of the dyed and fixed samples. Durability was evaluated by measuring rubbing and light fastness. Results: The oak pattern was dyed with 3 types of acid dyes and a comparative analysis was performed. The most suitable conditions are 95℃, 3 hours, and 3% o.w.f. In addition, evaluating resilience to daylight fastness, resilience to rubbing, fire resistance, and flame retardance, yielded results suitable for use as an interior material. Conclusion/Implications: It was confirmed that veneer can be dyed with acid dyes and used. It is hoped that this study will be used as basic data for dyeing veneer with acid dyes and synthetic dyes in the future. The results of this research are expected to contribute as basic data for the dyeing process of synthetic dyes.
Glyoxal/Aluminium Ammonium Sulfate를 이용한 면직물의 DP가공에서 첨가제의 영향
조항성,이범수,정성훈,이의소,Cho, Hang-Sung,Lee, Beom-Soo,Jeong, Seong-Hoon,Lee, Eui-So 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.4
When glyoxal was used as a crosslinking agent and aluminium ammonium sulfate as a catalyst for durable-press finishing, coreactants and additives to minimize the decrease of physical properties of durable-press finished cotton fabrics were studied. Also, optimum conditions such as coreactant/glyoxal mole ratio, the concentration of additives and the effects of one-bath and two-bath were investigated. Under the optimum concentration of DEG, the whiteness and strength retention of the fabrics treated with glyoxal/DEG/additive mixtures were increased while wrinkle recovery angles were decreased significantly. Under the optimum concentration of each additive, cotton fabrics were treated with various impregnation time in order to find the effect of two-bath method. The whiteness of cotton fabrics was increased by two-bath method, and wrinkle recovery angles were decreased either slightly or unchanged while the strength retention was not affected.