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한종규,한경렬,백병준,김형환,배원경,김일영 순천향의학연구소 2005 Journal of Soonchunhyang Medical Science Vol.11 No.1
Hemifacial microsomia(HFM) is a craniofacial disorder and complex malformation syndrome with a variable and asymmetric malformation involving first and second pharyngeal arch derivatives. Multiple etiological mechanisms for HFM have been considered. Mechanisms proposed include genetic factors, early embryogenesis insults involving abnormal neural crest development and migration, and stapedial artery hematoma. HFM is the second most common craniofacial malformation but has been rarely reported in korea, and we report five cases of HFM in temporal bone CT findings. The temporal bone CT findings of five patients aged 6 days and 19 years(mean, 9 years) with hemifacial microsomia were reviewed and evaluated. Particular attention was focused on auricular malformation, external auditory canal, volume of middle ear cavity, ossicular anomaly, facial nerve anomaly and inner ear anomaly. In all patients, temporal bone CT scans revealed the stenosis or atresia of external auditory canals, decreased middle ear cavities, matoid underdevelopment and ossicular anomalies including ossicular ankylosis, but only one patient showed facial nerve or inner ear anomaly. In conclusion, temporal bone CT scan is a useful diagnosis modality of hemifacial microsomia, which is especially more useful in preoperative evaulation and estimation of postoperative prognosis that demonstate middle and inner ear anomalies.
백경렬(Kyung-Ryul Baek),양재경(Jae-Kyung Yang),박상우(Sang-Woo Park) 한국환경관리학회 2006 한국환경관리학회 학술연구발표회 논문초록집 Vol.2006 No.6
It was evaluated whether carbonization would be available as a new technology for thermal treatment and recycle of municipal solid wastes(MSW) as alternative fuel. We studied on the fuel possibility of MSW by the carbonization. The yield was reduced as a carbonization temperature and time was increased and the contents of volatiles and the fixed carbons expressed the contrast tendency in all conditions. The fuel ratio were best suitable at the 500℃ of carbonization temperature and 30min of time. The calorific values of the carbonized products were in the range of 3,400~6,200㎉/㎏. The results of this research are illustrated that' the best condition for MSW carbonization is 500°C and 30min.
산성 및 유기성 가스의 동시제거를 위한 준건식 세정시스템의 적정 운전 조건
백경렬,구자공 한국환경과학회 2001 한국환경과학회지 Vol.10 No.1
The effect of major operating parameters in spray drying sorber(=SDS) for automatic control for the simultaneous removal of acidic and organic gaseous pollutants from solid waste incinerator was performed. The field experiment was carried out in pilot scale test for the quantification of major operating parameters of hydrophilic and the hydrophobic pollutants. The removal efficiencies of SO_2 and HCI in the 5wt% slurry condition were being increased with the increase of the stoichiometric ratio which is the molecular ratio of lime to the pollutant concentration, and with the decrease of inflow flue gas temperature in the pilot SDS reactor. The removal efficiency along the height of spray drying sorber was closely related to the temperature profile, and more than 90% of total removal efficiency was achieved in an absorption region. For the removal of acidic gas the optimum operating condition considering the economics and a stable operation is the 5wt% of slurry concentration, 1.2 of stoichiometric ratio and 250℃ of inflow flue gas temperature. For the organic gases of benzene and toluene the removal efficiencies were 20 - 60% which is much lower than that of acidic gas. The best removal efficiency was obtained at 1.5 of stoichiometric ratio and 250℃ of inflow flue gas temperature. The organic's removal efficiency along the height of spray drying sorber was quite different from that of acidic gas, that is, more than 60% of the total removal efficiency for benzene and 90% of the total removal for toluene were achieved in the dried adsorption region, which was formed at the lower or exit part of the reactor.
족관절 만성 불안정성을 갖는 축구선수에 적용된 변형 Brostrom 수술식
이경태,김현철,양기원,송백용,김장열,박성률 대한스포츠의학회 2001 대한스포츠의학회지 Vol.19 No.2
To evaluate the surgical results of anatomical procedure(Modified Brostrom) for symptomatic ankle instability, 29 patients(29 feet) with chronic ankle instability evaluated retrospectively from August 1994 to September 1998 after failing non-operative method for 6 months. The consecutive series of patient compromised 29 male football players with the average age 21 years. 12 ;layers were high level professional ;layer and the 17 players were amateur student players. All patients had grade 3 symptomatic instability by anterior drawer test. To evaluated associated injury and exact pathology of the ligament, all patients took the MRI and/or bone scan. For the evaluation of clinical outcome, relief of pain & instability and anterior drawer test were used. A subjective grading scale modified from Hamilton was used. Of the 29 operation performed, there were 21 excellent results, 5 good results and fair results as a whole. The reason for the all fair results were delayed return to the sport activity, and associated with osteochondral lesions. As associated injuries, we found 5 anterior impingement syndromes of ankle, 5 peroneal tendon problems, ossicle under malleolus and others. Those who didn't have any associated injury had all excellent result. There were 3 minor complications. To conclude, modified Brostrom procedure is available operative procedure for football players with chronic symptomatic ankle instability.
양수염색체 검사에서 경험한 변이형 염색체 4 Cases
이성률 ( Sung Ryul Lee ),백청순 ( Chung Soon Baek ),신미경 ( Mi Kyung Shin ),이규현 ( Kyu Hyun Lee ),조영숙 ( Young Sook Cho ) 대한임상검사과학회 1998 대한임상검사과학회지(KJCLS) Vol.30 No.3
Retrospective studies suggest that measurement of maternal serum unconjugated estriol, in combination with matemal serum human chorionic gonadotropin (hCG) and a-fetoprotein provides an effective method of prenatal screening for Down syndrome. The median maternal serum unconjugated estriol is lower in pregnancies with a Down syndrome fetus Comparative evalution studies concerning magnetic separation method reagent and coating tube method reagent were conducted the SAMKWANG REFERENCE LABORA T0RIES The results were summarizes as follows: 1. In 300 maternal serum at 14 to a) weeks gestraion uE3 level is near to overall mean (Table 1.2 figure 1.2) 2. The data of magnetic separation method were correlated well with coating tude method (r=O.8E64) Chromosomes that karyotyped in amniocentesis show various chromosome morphology and banding patterns because of culture state, media, hypotonic treatment intensity, band staining condition and individual variation etc. It is crucial that individual chromosomes were distinguished normal variation from abnormality because of different interpretation of fetus state. We experienced 4 cases that chromosomes showed different rmrphology or banding pattern from nonnal variant chromosomes. In Case I, chromosomes 22 that looked as add(22p) in amniotic fluid was 22pss and that 22pss was maternal origin In case 2, chromosome 19 looked add(19q) but that was maternal origin and mother``s chromosomes showed 1 banding variation chromosomes 9 of case 3 looked add(9q) but that was paternal origin and father``s chromosomes showed ~ banding variation also. In case 4, chromosomes 21 was 21p-and the shortness of p arm of chromosomes 21 was originated from mother. Consequently, all 4 cases were thought to be nonnal variant after parent``s karyotype. In armiotic fluid karyotyping, irregular chromosomes those looked different from nonnal variant chromosomes might be discriminated between variant and abnonnal chromosomes by parental blood karyotyping or other methods, Besides routine reference investigation, other methods, such as F1SH, PcR, CGH or other banding techniques may be introduced exact interpretation or karyotyping in amniotic fluid chromosomes analysis.