액체소듐속에서 소듐-물반응에 의한 재질의 Wastage현상

정경채,정지영,김병호,김태준,최병해,최종현,김의식 한국공업화학회 2003 응용화학 Vol.7 No.1

In this study we observed and analyzed the corrosion phenomena in leak site and the effect on temperature at the target surface of heat transfer tube material by sodium-water reaction through water leakage in liquid sodium atmosphere. Surrounding of leak hole of the specimen was damaged by the wastage phenomena due to corrosion and erosion of material, and hole size by damage of leak site was extended from 150㎛ to about 200㎛. Also, the damaged size appeared in the target surface was observed to about 1000㎛ diameter. The temperature of target surface increased about 70~80℃ by the heat of sodium-water reaction even with the small leakage of 15㎖ water. From the results of EPMA and EDX analysis, damaged area are found to covered with complex compounds such as (NaOH+Na_2O) FexOy or (NaCrO_2+nA_2CrO4) mixed up with the sodium oxides by sodium-water reaction and the Fe or Cr element by matrix of tube sodium oxides by matrix of tube material.

소듐-물 반응사고 중/후반기 계통거동특성 연구

정지영,어재혁,김태준,정경체,김병호,한도희,박남국 한국공업화학회 2004 응용화학 Vol.8 No.1

In order to investigate the later phase of a sodium-water reaction (SWR) event in KALIMER (Korea Advanced Liquid MEtal Reactor), the code SELPSTA (Sodium-water reaction Event Later Phase System Transient Analyzer) has been developed and an experimeantal study has been carried out for verification of the simple analysis model applied to the code. The 24 data set obtained in the experiment have been pre-analyzed. Comparison of SELPSTA results with experimental data shows fairly good agreement in the transient.

나트륨-물 반응 사고 중/후반기 거동특성 연구

정지영,어재혁,정경채,김병호,김종만,김태준,박남국 한국공업화학회 2003 응용화학 Vol.7 No.1

Generally, the analysis of a sodium-water reaction (SWR) is classified by two major events. One is the very initial stage of peak pressure and shock wave propagation caused by the reaction itself, and the other is the bulk motion including the mass transfer phase in the quasi-steady state of the reaction period during several second or minute orders after leak initiation. The system dynamic response during a sodium-water reaction event shows very different characteristics between the initial stage and the long-term period. In order to investigate the later phase of a SWR event. the code SELPSTA (Sodium-water reaction Event Later Phase System Transient Analyzer) has been developed and the desing and construction of the test facility has been made.

나트륨-수증기 반응에 대한 실험적 연구

정지영,정경채,김병호,김태준,최종현,박남국 한국공업화학회 2002 응용화학 Vol.6 No.2

An experimental study for the investigation of the sodium-steam reaction phenomena was carried out. No significant aggressive explosion phenomena were observed as compared with that of sodium-water reactions. It was also observed that the rate of increase of reaction temperature decreases with increasing initial temperature of liquid sodium and that the temperature of the target depends upon the flow rate of injected steam.

Co-60 감마선에 대한 부정형조사면의 조직공중선량비(TAR) 계산

이수용,김채옥,김필수,지영훈 漢陽大學校 基礎科學硏究所 1988 基礎科學論文集 Vol.7 No.-

방사선치료에 사용되는 대표적인 부정형조사면 다섯가지에 대한 각 관심점에서의 선량계산을 위하여 새로 고안한 도표를 사용하여 Co-60감마선에 대한 부정형조사면의 조직공중선량비(TAR)를 계산하였다. 도표를 이용한 계산과 기존의 계산법인 컴퓨터계산법 및 근사법으로 구한 TAR를 측정에 의한 TAR에 비교하여 다음과 같은 결과를 얻었다. 관심점이 방사선속의 중심축상에 있을 때 부정형조사면에서 이들 방법으로 구한 TAR의 대부분은 오차가 1% 이내에서 잘 일치되어 있으며, 축으로부터 벗어난 경우에는 최대 오차가 각각 2.4%,2.3%, 및 8.8% 이었다. 이들 결과로부터 새로 고안한 도표를 이용한 계산법의 정확성을 확인하였다. In order to calculate the dose on each interest point in five types of irregularly shaped fields used commonly in radiotherapy, the tissue-air ratios (TAR) in these fields for Co-60 gamma radiation were calcnlated using the newly devised SAR-chart. The TARS calculated from newly method of using the SAR-chart. computer method and approximation method at the interest point were compared to the TARs obtained from measurement. The result are as follows: In case of the interest points on central axis the calculated TARs in irregularly shaped fields by the above metioned methods were well agreed within the error of 1%, whereas for the interest points on off-axis the calculated TARs were resulted in the maximum errors of 2.4%, 2.3% and 8.8% respectively. From these results, the accuracy of calculation method of using the SAR-chart was comfirmed.

수입각증후군에 의한 급성 복증 1례

정은욱,지삼룡,이영태,박지훈,김동기,제인수,채두근,박성재,박은택,이연재,이상혁,설상영,정정명 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Afferent loop syndrome is an uncommon complication of a gastrectomy and Billroth Ⅱ reconstruction. It may cause symtoms at any time from the first postoperative day to many years after the gastrectomy. Afferent loop syndrome is characterized by abdominal pain, vomiting and elevation of serum amylase. Thus, it is difficult to differentiate afferent loop syndrome from other cause of acute pancreatitis. However, the history of gastrectomy can be an important clue for diagnosing afferent loop syndrome. We experienced one case of chronic afferent loop syndrome with acute pancreatitis. After appropriate management, the abdominal pain disappeared and serum amylase level decreased. We report this case with a review of relevant literatures.

SELDI-TOF MS를 이용한 탄저 치사독소 처리에 의한 생쥐 재식세포주의 단백질체 분석

정경화,서귀문,김성주,김지천,채영규 한양대학교 이학기술연구소 2007 이학기술논문지 Vol.10 No.-

탄저는 탄저균이 동물에 감염되어 발병하는 인수 공통 질병이다. 탄저균의 아포가 감염되면 식균작용에 의해 대식세포 내로 들어가게 된다. 대식세포 내에서 아포는 발아하며 대식세포에서 숙주의 체내로 들어가게 된다. 치사독소는 방어항원과 치사요소로 구성되어있다. 방어항원은 세포의 탄저독소 수용체에 결합하여 방어항원에 결합한 치사요소를 세포내로 운반한다. 운반된 치사요소는 mitogen-activated protein kinase kinase (MAPKK)의 N-말단 부위를 전달하는 것으로 알려졌으나, 이 기작은 세포 사멸에 직접적인 영향을 주지 않는다. 탄저 치사독소에 의한 세포 사멸에 대한 많은 연구가 이루어지고 있으나, 그 기전이 아직까지 명확하게 규명이 되지 않고 있는 실정이다. 본 연구에서는 탄저 치사독소 처리에 의한 생쥐 대식세포주 (RAW 264.7)의 단백질의 발현양상을 조사하여 탄저 치사독소의 세포내 작용기작을 규명하고자 하였다. 단백질 발현 양상을 SELDI-TOF MS을 이용하여 분석하였다. 치사독소를 처리한 대식세포주에서 3,973 Da 단백질의 발현은 90분과 180분에 2배 정도 증가하였다. 단백질 6,066 Da의 발현은 60분에 두 배 증가하고 시간이 지남에 따라 점점 증가하였다. 단백질7,520 Da은 발현이 감소하고, 단백질 8,375 Da과 16,769 Da의 발현은 점점 감소하여 180분에는 절반으로 감소하는 경향을 보였다. MAPKKs가 절단되는 60분이 기준으로 점차 변화가 일어나는 이들 단백질은 치사독소의 절단된 MAPKKs에 의해 발현이 변화하는 것으로 추정되었다. Anthrax is an infectious disease caused by Bacillus anthracis. The spores of B. anthracis are accessed into the body and germinated in macrophages. B. anthracis secretes three virulence factors (such as, protective antigen : PA, lethal factor : LF, and edema factor : EF), and escapes destruction and lyse the macrophages by an unknown mechanism. Anthrax toxins play a central role in pathogenesis of anthrax. Lethal toxin (LeTx) is a mixture of PA and LF. LF is a zinc-dependent endoproteinase that cleaves the amino terminus of mitogen-activated protein kinase kinases (MAPKKs). The role of LeTx in mediating these effects is unknown, largely due to the difficulty in identifying and assigning function to individual proteins. To analyze the cytosolic protein profile of murine macrophages treated with LeTx, we have performed surface enhanced laser desorption/ionization time-of-flight mass spectrometer. The protein peak of 3,973 Da was increased 2 fold at 90 min and 180 min in murine macrophages treated with the LeTx. The protein peak of 6,066 Da was increased 2 fold at 60 min and gradually increased at 90 min and 180min. Protein peak 8,973 Da and 16,769 Da was decreased 2 fold in 180 min. Our results suggest that these proteomic approaches are a useful tool to study gene and protein expression in intoxicated macrophages.

반월상 연골판 손상을 동반한 내측 측부인대 부분파열 환자의 한방 치료 효과: 증례보고

전용현(Yong-Hyun Jeon),김두리(Doo-Ri Kim),문희영(Hee-Young Moon),박지원(Ji-Won Park),이윤하(Yun-Ha Lee),채지원(Ji-Won Chai1),최동주(Dong-Joo Choi),최효정(Hyo-Jung Choi) 척추신경추나의학회 2019 척추신경추나의학회지 Vol.14 No.2

Objectives : The purpose of this report was to introduce 3 cases of patients diagnosed with both medial collateral ligament tear and meniscal tear that showed clinical improvement after Korean medicine treatment. Methods : These patients received Korean herbal medicine, pharmacopuncture treatment, and acupuncture treatment. We assessed these cases by using the Numeric Rating Scale (NRS), Western Ontario and McMaster Universities’Arthritis Index (WOMAC), and the European Quality of Life-5 Dimension Index (EQ-5D). Results : After Korean medicine treatment, most of the NRS, WOMAC, and EQ-5D scores showed improvement on every discharge date of these 3 cases. The NRS and WOMAC scores of all cases showed a decrease. The EQ-5D of all cases showed an increase. Conclusions : Through this research, we concluded that Korean medicine treatment can be helpful in relieving pain and improving the quality of life and function of knee joint movement in patients with medial collateral ligament tear and meniscal tears.

급성 신우신염이 선행된 Escherichia coli 농흉 1예

차치운,조준형,김미진,오윤정,연재우,이성규,오미정,채지영,김수연 대한감염학회 2009 감염과 화학요법 Vol.41 No.5

We experienced a case of acute pyelonephritis which progressed to Escherichia coli bacteremia and later complicated by empyema in a 65-year-old female. She was successfully treated with intravenous antibiotic therapy and percutaneous drainage of empyema.

The Impact of HIIT Program on Self-control and Attention in Middle School Boys

Chai, Ji Young(최지영),Kim, Kyeong Lae(김경래),An, Min Ji(안민지) 학습자중심교과교육학회 2019 학습자중심교과교육연구 Vol.19 No.23

이 연구는 HIIT 프로그램이 남자 중학생의 자기통제력과 주의집중력에 어떠한 영향을 미치는지를 규명하여, 효율적인 HIIT 프로그램 개발에 필요한 기초 자료를 제공하는데 목적이 있다. 연구 참여자는 J도 H군 소재 H중학교 3학년 남학생 22명으로, 실험집단과 통제집단에 각각 11명씩 무선 배정하였다. HIIT 프로그램은 주 3회 20분씩, 8주 동안 수행하였으며, SPSS 통계 프로그램을 활용하여 t-test를 실시하여 집단 내 및 집단 간 차이를 분석하였다. 8주간 HIIT 프로그램 적용 후 실험집단 내 전‧후 비교에서 자기통제력 하위 6가지 항목 중 충동성, 모험추구, 자기중심, 화 기질 4가지 항목에서 유의차가 나타났다. 집단 간 사후 비교에서는 충동성과 화 기질 2가지 항목에서 유의차가 나타났다. 집단 내 사전·사후 주의집중력 변화에서는 실험집단에서 선택적 주의력, 지속적 주의력은 통계적으로 유의한 차이가 나타났고, 자기통제력/분산주의력은 통계적으로 유의한 차이가 나타나지 않았다. 실험 후 집단 간 비교에서는 모든 변인에서 통계적으로 유의한 차이가 나타나지 않았다. This study was to analyze the influence of HIIT on self-control and attention in middle school boys. The participants of This study were 22 3rd grade male students at H middle school. They were divided into 2 groups randomly(Exercise Group-EG:11, Control Group-CG: 11). The program was performed for 20 minutes, 3 times each week for 8 weeks from April to June in 2017. The t-test was used to analyze the differences within and between two groups. After 8 weeks, there were significant differences statistically in impulsiveness, adventure seeking, self-centering, anger temperament(self-control). There was significant difference between two groups in impulsiveness and anger temperament. In the changes of attention before and after the experiment, there was significant difference statistically in selective attention and sustained attention but there was no difference in self-control/distributed attention of EG. There was no significant difference statistically between two groups after the experiment.