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한국인 정신분열병 환자의 지연성 운동장애와 $CYP2D6^*4$ 및 $CYP2D6^*10$ 다형성들의 연합에 대한 고찰
우성일,강동우,서한길,김봉조,이인상,정근화,박소영,정치영,이환철,정경천,손진욱,Woo, Sung-Il,Kang, Dong-Woo,Seo, Han-Gil,Kim, Bong-Jo,Lee, In-Sang,Jeong, Geun-Hoa,Park, So-Young,Jung, Chi-Yeong,Lee, Hwan-Cheol,Jeong, Kyeong-Cheon,Sohn, 대한생물정신의학회 2000 생물정신의학 Vol.7 No.2
P450 CYP2D6 enzyme(=debrisoquine hydroxylase) is known to metabolize many neuroleptics and some genetic polymorphisms in the CYP2D6 gene were reported to be associated with tardive dyskinesia(TD). We investigeted the association of two genetic polymorphisms in the CYP2D6 gene, $CYP2D6^*4$ and $CYP2D6^*10$, with TD in Korean schizophrenic subjects. Subjects consisted of 71 Korean schizophrenics and TD was evaluated using the Abnormal Involuntary Movement Scale (AIMS). There were no statistically significant differences in the demographic variables of age, male to female percentage and the current antipsychotic(CPZ equivalent) dose between the group with TD and the group without TD. But the duration of antipsychotic drug exposure was significantly higher in the group without TD(p=0.000, by independent t-test). The mean AIMS score in the group with TD was $11.2{\pm}6.6$(S.D.). Genotypings for the presence of $CYP2D6^*4$ and $CYP2D6^*10$ were done using PCR amplifications and endonuclease digestions. There were no statistically significant genotypic and alleleic associations between TD and $CYP2D6^*4$(by chisquare tests), and between TD and $CYP2D6^*10$(by chi-square tests). These results indicate that the $CYP2D6^*4$ and $CYP2D6^*10$ polymorphisms have no significant roles in the causation of TD.
( Sung Soo Park ),( Seung Hoon Kim ),( Mihee Kim ),( Jong Wook Kim ),( Yoo Mi Ko ),( Sung Kyoung Kim ),( So Hyang Kim ),( Chi Hong Kim ) 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.4
Although influenza A (H1N1) virus leads to self-limiting illness, co-infection with bacteria may result in cases of severe respiratory failure due to inflammation and necrosis of intra-airway, as pseudomembranous tracheobronchitis. Pseudomembranous tracheobronchitis is usually developed in immunocompromised patients, but it can also occur in immunocompetent patients on a very rare basis. We report a case of pseudomembranous tracheobronchitis complicated by co-infection of inflenaza A and Staphylococcus aureus, causing acute respiratory failure in immunocompetent patients.
Park, Mi Ra,Abbas, Yawar,Hu, Quanli,Abbas, Haider,Lee, Nam Joo,Lee, Tae Sung,Yoon, Tae-Sik,Kang, Chi Jung American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.10
<P>The fabrication of a hybrid structure with a gamma-Fe2O3 nanoparticle assembly and a Ta2O5 thin-film layer was demonstrated. This hybrid device rejuvenated the switching characteristics of only the Ta2O5 thin film. The hybrid device manifested the typical bipolar switching characteristics in the structure of Ti/gamma-Fe2O3/Ta2O5/Pt on the SiO2/Si substrate. The SET voltage (V-SET) was observed at similar to+1.6 V, and the RESET voltage (V-RESET), at similar to-1 V, which are smaller compared to those of the Ti/Ta2O5/Pt device. The temperature-dependent switching characteristics of both devices were studied to understand the conduction mechanism in both devices. The results were space charge limited conduction (SCLC) for the higher voltages at a high resistance state (HRS) and purely ohmic conduction at a low resistance state (LRS). The devices showed a high and stable ratio of currents in LRS and HRS. Finally, it was confirmed that the insertion of the gamma-Fe2O3 nanoparticle assembly at the interface of Ti/Ta2O5 rejuvenated the switching characteristics of the hybrid device.</P>
Reduction of ipsilateral thalamic volume in temporal lobe epilepsy with hippocampal sclerosis
Park, Kang Min,Kim, Tae Hyung,Mun, Chi Woong,Shin, Kyong Jin,Ha, Sam Yeol,Park, JinSe,Lee, Byung In,Lee, Ho-Joon,Kim, Sung Eun CHURCHILL LIVINGSTONE 2018 Journal of Clinical Neuroscience Vol.55 No.-
<P><B>Abstract</B></P> <P>The thalamus plays an important role in the modulation of both focal and generalized seizures, but the mechanisms related to seizures may be different among epilepsy syndromes. The aim of this study is to investigate the thalamic atrophy in different epilepsy syndromes. We enrolled a total of 72 patients with epilepsy (22 patients with temporal lobe epilepsy with hippocampal sclerosis, 21 patients with extra-temporal lobe epilepsy, and 29 patients with juvenile myoclonic epilepsy). We analyzed structural volumes of the brain with FreeSurfer 5.1 software, and compared them among subgroups of epilepsy and normal control subjects. Moreover, we quantified correlations between the duration of epilepsy and the structural volumes with age and sex as covariates. The volumes of the ipsilateral hippocampus in temporal lobe epilepsy with hippocampal sclerosis were significantly smaller than those in extra-temporal lobe epilepsy and normal control subjects [analysis of variance (ANOVA), p < 0.001]. Although the volumes of the ipsilateral thalamus were not different from those of normal control subjects, the volumes of the ipsilateral thalamus were negatively correlated with duration of epilepsy in temporal lobe epilepsy with hippocampal sclerosis (r = −0.5, <I>p</I> = 0.02). However, the volumes of interest in extra-temporal lobe epilepsy and juvenile myoclonic epilepsy were not different from those in normal control subjects, and none of these structures were correlated with duration of epilepsy. These findings suggest that the role of the thalamus may be different in thalamo-limbic circuits among epilepsy syndromes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We investigate the thalamic atrophy in different epilepsy syndromes. </LI> <LI> There is a reduction of ipsilateral thalamic volume only in temporal lobe epilepsy with hippocampal sclerosis. </LI> <LI> The role of the thalamus is different in thalamo-limbic circuits among epilepsy syndromes. </LI> </UL> </P>
Zinc Sulfide-selenium X-ray Detector for Digital Radiography
Park, Ji-Koon,Kang, Sang-Sik,Kim, Jae-Hyung,Mun, Chi-Woong,Nam, Sang-Hee The Korean Institute of Electrical and Electronic 2002 Transactions on Electrical and Electronic Material Vol.3 No.4
The high bias voltage associated with the thick layer (typically 500-1000 ㎛) of selenium required to have an acceptable x-ray absorption in radiography and fluoroscopy applications may have some practical inconvenience. A hybrid x-ray detector with zinc sulfide-amorphous selenium structure has been developed to improve the x-ray sensitivity of a a-Se based flat-panel digital imaging detector. Photoluminescence(PL) characteristic of a ZnS:Ag phosphor layer showed a light emission peak centered at about 450 nm, which matches the sensitivity spectrum of selenium. The dark current of the hybrid detector showed similar characteristics with that of a a-Se detector. The x-ray sensitivity of hybrid and a-Se x-ray detector was 345 pC/㎠/mR and 295 pC/㎠/mR at an applied voltage of 10 V/㎛, respectively. The purpose of this study was to evaluate the pertinence of a solution using a thin selenium layer, as a photosensitive converter, with a thick coating of silver doped zinc sulfide phosphor.
Development of Integrated Boration and Dilution Model for Boron Concentration Behavior Analysis
Chi, Sung-Goo,Park, Han-Kwon,Kuh, Jung-Eui Korean Nuclear Society 1992 Nuclear Engineering and Technology Vol.24 No.1
In this study, an integrated boration and dilution (INBAD) model is proposed to predict the required makeup flowrate for RCS boron concentration change and to analyze the boron concentration behavior at each subsystem within the RCS including CVCS during boration and dilution operation. The INBAD model is constructed by integrating an existing neutronic code and a boration and dilution model. The boration and dilution model has been developed for our specific purpose using the one-cell model and multi-cell model. In addition, in order to assess the boron concentration behavior more realistically, two important features such as variable pressurizer heater output and optional makeup mode (either direct or indirect injection) are implemented in this model. In order to demonstrate the usefulness of this model, the boron concentration behavior analysis at each subsystem were performed for both direct and indirect injection mode using YGN 3 and 4 design data. Also, the effect of pressurizer heater output on the primary loop boron concentration was investigated. The results showed that the boron concentration changes can be predicted accurately at each subsystem during boration and dilution operation.