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한 호,안명주,최정혜,이창범,이영열,최일영,김인순,이웅수 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.2
Pernicious anemia is the most common cause of vitamin B12 deficiency and is caused by autoimmune destruction of parietal cell containing gastric mucosa region. This disease is significantly associated with autoimmune endocrinopathies and anti-receptor autoimmune disease. We report here a case of 26-year old man who was diagnosed pernicious anemia with high level of autoantibody titer (antithyroglobulin antibody 1:25,600 and antimicromosomal antibody 1:6,400) indicating subclinical Hashimoto's thyroiditis. Since other autoimmune diseases are frequently associated with pernicious anemia even without evidence of clinical symptoms, screening test for the presence of autoimmune disease should be evaluated in these patients.
헤밍 공정의 횟수가 헤밍 품질에 미치는 영향에 관한 연구
신나은,최문호,최영덕,최해운,장래성,최계광,김세환,윤재웅,이춘규,Shin, Na-Eun,Choi, Moon-Ho,Choi, Young-Deok,Choi, Hae-Un,Jang, Rae-Seong,Choi, Kye-Kwang,Kim, Sei-Hwan,Yun, Jae-Woong,Lee, Chun-Kyu 한국금형공학회 2016 한국금형공학회지 Vol.10 No.1
In this study, it was investigated by comparing the experimental hemming by the 3 steps and 2 steps in order to stabilize the quality of the hemming process. In the experimental results, the three-step hemming superior to the two-step one and the dimensional stability of part that was made by the three-step on was high. When the second stage Hemming has been found that the deflection caused by the force to the wear of the punch becomes larger plane can be folded by the hemming crimping and crimp uncertain.
( Choi Kang ),( Cui Gang ),( Youngrok Choi ),( Hyeyoung Kim ),( Suk-won Suh ),( Hae Won Lee ),( Nam-joon Yi ),( Kwang-woong Lee ),( Kyung-suk Suh ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Aims: Reviewed the long-term cosmetic outcomes of the different types of wound incision. Methods: 121 Living donors underwent donor hepatectomy for LDLT from September 18th 2006 to December 6th 2013 were included. They were divided into 4 groups according to the incisional types; inverted L upper (n=78 the L group), upper midline (n=35, the U group) and transverse (n=8, the T group). Wound cosmetic outcomes were evaluated mean 458 days after operation using the Vancouver Scar Scale. Results: The T group had better cosmetic outcomes; VSS median of 4.5, 5.0, 6.0 and 7.0 in T, MB, L and U groups respectively. Pigmentation (P=0.153), vascularity (P=0.219), pliability (P=0.336) and wound height (P=0.639) were not different according to the groups. Hypertrophic scarring and Keloids occurrence was lower in T group: 1 (12.5%) in T group, 10 (28.6%) in U group and 19 (24.4%) in L group (P=0.033) (Table 1). The location of scarring was usually in midline incisional site. The distribution of scarring was even in the transverse incision, but it was occurred a little more in the upper 1/3 and the lower 1/3 in midline incision. Conclusions: General long-term cosmetic outcomes were similar following the different minimally invasive incisions. Hypertrophic scar and Keloids occurrence can be decreased in the transverse incision.
Woong-Ki Choi,Myung-Sun Hong,Hae-Seong Lee,안계혁,Joon-Hyuk Bang,이영실,김병주 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.2
In this work, the electromagnetic interference shielding effectiveness (EMI-SE) of carbon nanotube/carbon fiber-reinforced HDPE matrix composites are investigated with various preparation conditions, such as the carbon fiber and carbon nanotube content, the presence of metal additives, as well as mixing speed and time. It was found that the EMI-SE of the composites increased with filler contents and metal additives. These results indicate that the content and length of carbonaceous fillers determine the electric networks in the composites, resulting in the control of the EMI-SE of the composites.
그람양성구균에 대한 Teicoplanin과 Vancomycin의 시험관내 항균력
최태열,김경숙,전용관,서일혜,김정욱,이웅수,안정열,김홍석,정재용,최효선,김덕언,유진우 대한감염학회 1994 감염 Vol.26 No.1
An increasing frequency of methicillin resistant S. aureus(MRSA), methicillin resistant coagulase negative staphylococci(MRCNS) and Enterococcal infection have been observed in recent years. Teicoplanin is a new glycopeptide antibiotic obstained from the Actinoplanes teicomycetius. The molecular structure and spectrum of antimicrobial activity of teicoplanin is simillar to those of vancomycin, and has been reported to have an excellent in vitro and in vivo effect against various gram-positive infections. Therefore, we evaluated the in vitor susceptibility of gram positive cocci, such as, S. aureus, coagulase negative Staphylococci(CNS), and Enterococci to teicoplanin and vancomycin. The total 253 strains consisted of MSSA(40), MRSA(53), MSCNS(47), MRCNS(48), and Enterococci(65). They were assayed by disc diffusion and agar dilution. During the study, 57% of S. aureus and 49% of CNS showed resistance to methicillin. The inhibitory diameter of teicoplanin was 15-20mm in MSSA, 12-19mm in MRSA, 13-24mm in MSCNS, 11-23mm in MRCNS, and 15-22mm in Enterococci respectively, and showed sensitivity in all but 8 strains(3.2%). The range of the minimum inhibitory concentration (MIC) of teicoplanin to MSSA, MRSA, MSCNS, MRCNS and Enterococci were 9.12-2.0㎍/ml, 0.25-2.0㎍/ml, & 0.25-32㎍/ml, 0.12-1.0㎍/ml respectively. One case of S. haemolyticus was resistant to teicoplanin (32㎍/ml) by the agar dilution method. Eight minor (3.2%) and one major(0.4%) error was observed when the MIC and disk diffusion data were correlated with teicoplanin. As for vancomycin the inhibitory diameter was 17-21mm in MSSA, 15-21mm in MRSA, 18-26mm in MSCNS, 18-25mm in MRCNS, and 16-22mm in Enterococci respectively. The range of the MIC of vancomycin to MSSA, MRSA, MSCNS, MRCNS, and Enterococci were 0.25-1.0㎍/ml, 0.25-4.0㎍/ml, 0.5-2.0㎍/ml and 0.5-2.0㎍/ml respectively. One minor error (0.4%) was seen with the vancomycin disk. The MIC90 of MSSA and MRSA exhibited the same results in teicoplanin (1.0㎍/ml, 1.0㎍/ml), and vancomycin(2.0㎍/ml, 2.0㎍/ml). MSCNS and MRCNS exhibited greater MIC90 with teicoplanin(4.0㎍/ml, 8.0㎍/ml) than vancomycin(2.0㎍/ml, 2.0㎍/ml). Incontrase Enterococci were more susceptible to teicoplanin(0.5㎍/ml) than to vancomucin (2.0㎍/ml). Results from this analysis indicated that both teicoplanin and vancomycin were very excellent for gram positive infections, especially those resistant to methicillin.
Choi, Young Hae,Kim, Jin Woong,Yoo, Ki Pung,Noh, Min Jeong,Park, Eun Mee 한국화학공학회 1996 Korean Journal of Chemical Engineering Vol.13 No.2
Experimental results concerning the processing feasibility of using supercritical CO₂ were reported for the extraction of epicuticular wax from Ephedra herb. Subsequently the isolability of nonacosan-10-of from the total extract of epicuticular wax was evaluated by TLC and gas chromatography. Also, Soxhlet extractions of Ephedra herb by n-hexane and chloroform were performed and these results were compared with those obtained by supercritical CO₂ extraction. As a result, we could demonstrate that supercritical CO₂ can be an economical alternative to the organic solvents in processing the medicinal plant.
Effect of Grain Size and Die-Upset Temperature on Texture in Die-Upset Nd-Fe-B Magnet
Hae-woong Kwon,Kang, Y.S.,Choi, G.S.,Yu, J.H. IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>Hot-pressed Nd<SUB>13.5</SUB>Fe<SUB>77</SUB>Si<SUB>1</SUB>B<SUB>8</SUB> alloy compacts with various grain sizes ranging from approximately 50 nm to 200 nm were prepared using melt-spun material. The compacts were then subjected to die-upsetting. The effect of grain size in the hot-pressed compact on the texture in die-upset magnet was investigated. The effect of die-upset temperature on the texture in die-upset magnet was also investigated. Texture in the die-upset Nd<SUB>13.5</SUB>Fe<SUB>77</SUB>Si<SUB>1</SUB>B<SUB>8</SUB> alloy samples decreased with increasing the grain size in the hot-pressed compact before the die-upsetting. This dependence of texture on the initial grain size could be explained by the unique texture formation mechanism of a stress-induced preferential grain growth via dissolution and precipitation. Texture of the die-upset sample was also influenced by the die-upsetting temperature. The samples die-upset at 700degC and 900degC had poorer texture compared to the samples die-upset at the temperature range of 750degC-850degC. The poor texture in the sample die-upset at lower temperature of 700degC was attributed to the less dissolution of the unfavorable Nd<SUB>2</SUB>Fe<SUB>14</SUB>B grains and low fluidity of the liquid Nd-rich grain boundary phase. The poor texture in the sample die-upset at higher temperature of 900degC was explained by the reduced elastic modulus and the excessive grain growth of the Nd<SUB>2</SUB>Fe<SUB>14</SUB>B grains.</P>