Skin entrance dose for digital and film radiography in Korean dental schools

Cho, Eun-Sang,Choi, Kun-Ho,Kim, Min-Gyu,Lim, Hoi-Jeong,Yoon, Suk-Ja,,Kang, Byung-Cheol 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4

Purpose : This study was aimed to compare skin entrance dose of digital radiography with that of film radiography and to show the dose reduction achievement with digital systems at 11 dental schools in Korea. Materials and Methods : Forty six intraoral radiographic systems in 11 dental schools were included in this study. Digital sensors were used in 33 systems and film was used in 13 systems. Researchers and the volunteer visited 11 dental schools in Korea. Researchers asked the radiologic technician (s) at each school to set the exposure parameters and aiming the x-ray tube for the periapical view of the mandibular molar of the volunteer. The skin entrance doses were measured at the same exposure parameters and distance by the technician for each system with a dosimeter (Multi-O-Meter : Unfors instruments, Billdal, Sweden). Results : The median dose was 491.2 μGy for digital radiography and 1,205.0 μGy for film radiography. The skin entrance dose digital radiography was significantly lower than that of film radiography (p<0.05). Conclusion : Fifty-nine percent skin entrance dose reduction with digital periapical radiography was achieved over the film radiography in Korean dental schools.

분자역학적 방법을 이용한 부산시내 대형건물 냉각탑수의 레지오넬라균의 형별 분류

김정만,정석훈,서대영,박은희,송은주,최재철,이은엽,장철훈 대한임상미샐물학회 2004 Annals of clinical microbiology Vol.7 No.1

대동맥 판막 치환술 후 반복되는 Acinetobacter baumannii 균혈증의 원인이 된 대동맥염 1예

정용필,김성철,송은희,장은영,김은경,김윤지,성흥섭,김미나,최상호,우준희,김양수 대한감염학회 2007 감염과 화학요법 Vol.39 No.3

감염성 대동맥염은 흔하지 않지만 매우 위중한 질병으로 Salmonella so.와 S. aureus가 주된 원인균이다. 아직까지 병원내 감염의 주요 원인균인 Acinetobacter baumannii에 의한 감염성 대동맥염은 보고된 바가 없었다. 저자들은 대동맥 판막 치환술을 시행받은 76세 남자 환자에서 적절한 항생제 투여에도 반복되는 A. baumannii 균혈증의 원인이 감염성 대동맥염으로 진단되었던 1예를 경험하였기에 보고하는 바이다. Infectious aortitis is an uncommon yet, life threatening disease. Early surgical treatment and prolonged antibiotic therapy is crucial to survival. Salmonella sp. and Staphylococcus aureus are the most common organisms isolated. There is no case report of infectious aortitis caused by Acinetobacter baumannii, which has recently emerged as a major cause of health care-associated infections. Here, we describe a 76-year-old male with infectious aortitis who experienced recurrent bacteremia due to A. baumannii in spite of adequate antimicrobial therapy after aortic valve replacement.

Piplartine과 전립선암 세포사멸

공은희,김광연,유선녕,이선이,안순철 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

Background: Prostate cancer is one of the leading causes of cancer-related deaths in men worldwide.Piper species have known anti-proliferation and anti-cancer activity. This study was to examine the anti-proliferation effects of piplartine on human prostate cancer cell. Methods: PC-3 human prostate cancer cells received piplartine 15 uM for 24 hours. Microarray was performed on piplartine-treated PC-3 cells. Results: Among 253 genes which were altered by piplartine-treated PC-3 cells (>3-4 folds), 143 genes were up-regulated and 110 genes were down-regulated by piplartine in microarray. Most of genes whichwere up-regulated by piplartine were functionally classified as apoptosis, immune response related genes. Genes which were down-regulated by piplartine were functionally classified as transcription, cell cycle related genes. Conclusion: Piplartine may induce anti-tumor activity for human prostate cancer along with regulated of cell cycle and apoptotic genes in piplartine-induced PC-cells.

의료전달체계 개선의 방향과 전략

박은철 건강보험심사평가원 2021 HIRA RESEARCH Vol.1 No.1

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한국인 알코올의존환자에서의 제1형 부신피질자극 호르몬 분비 촉진 호르몬수용체의 유전자 다형성에 관한 연구

김철민,김성곤,김지훈,김현경,김미경,유정현,민은정 대한생물치료정신의학회 2011 생물치료정신의학 Vol.17 No.2

스트레스 반응에 중요한 역할을 하고 있는 CRHR1 유전자 SNP와 알코올 의존과의 연관성에 관한 선행 연구들이 있다. 이에 본 연구는 백인을 대상으로 조사했던 기존연구와는 달리 한국인 남녀를 대상으로 하여 알코올 의존군과 정상 대조군의 CRHR1 유전자형 빈도 및 대립유전자형 빈도를 비교하였다. 본 연구의 연구대상자들은 알코올 의존군 268명(남자 218명, 여자 50명)과 정상 대조군 137명(남자 78명, 여자 59명)이었다. CRHR1 유전자 SNP를 SNP database와 선행연구를 근거로 선정한 후, 연구 대상자들의 이러한 SNP 유전자형을 PCRRFLP방법으로 조사하였다. 그 결과, 한국인의 CRHR1 유전자 SNPs로 7개(rs242938, rs404623, rs28364027, rs16940686, rs937, rs878886, rs878887)가 분석되었다. 이중 rs28364027의 A 대립 유전자의 빈도는 남녀 각각에서 알코올 의존군이 대조군보다 유의하게 높았다. 그리고 rs28364027의 AA 유전자형 및 A 대립 유전자와 rs878886의 CC유전자형 및 C 대립유전자의 빈도는 알코올 의존군내에서 여성이 남성보다 유의하게 높았다. 이러한 결과를 종합해 보면 CRHR1 유전자 SNP가 알코올 의존의 유전적 원인의 중요한 요인일 가능성을 제시하고 있다. 또 이러한 CRHR1 유전자 SNP가 알코올 의존의 유전적 원인에서 남녀간 차이를 설명할 수 있을 가능성도 시사하고 있다. Objectives:There were several preceding studies investigating the association between alcohol dependence and corticotropine releasing hormone receptor1(CRHR1) gene SNPs that play an important role in response to stress. The frequencies of CRHR1 genotypes and alleles were compared between alcohol-dependent patients and normal control subjects. Methods:The subjects were 268 alcohol-dependent patients(218 males, 50 females) and 137 normal controls(78 male, 59 female). CRHR1 gene SNPs were investigated according to the SNP database and the results from previous studies, and their genotypes were analyzed by polymerase chain reaction(PCR) and restriction fragment length polymorphism(RFLP). Results:Seven CRHR1 gene SNPs(rs242938, rs404623, rs28364027, rs16940686, rs937, rs878886, rs878887) were found in Korean subjects. The frequency of rs28364027 A allele was significantly higher in alcohol-dependent patients than normal controls in both genders. In alcohol-dependent patients, the frequencies of AA genotype and A allele of rs28364027, and of CC genotype and C allele of rs878886 were higher in female than male. Conclusion:These results suggest that CRHR1 gene SNP is one of the important genetic factors in the etiology of alcohol dependence. And also it is supposed that the different frequency of SNP genotype could explain stress-related gender difference in the genetic etiology of alcohol dependence.

장기간의 40분 달리기 운동이 비만학생의 혈청 지질 및 아포지단백 대사에 미치는 영향

박철호,권민호,고봉민,박은경,우상헌 東亞大學校附設스포츠科學硏究所 1999 스포츠科學硏究論文集 Vol.17 No.-

The purpose of this study was to investigate the effect of 12 wks before and after running exercise of obsese student in D high school in Pusan city, exercise group(7) performed 12 wks running exercise and control group(7),before and after subjects performed the maximal exercise thest on treadmile's 12 wks running exercise. Through the comparision and analysis of change serum lipids and apoliporotein metabolism, the results of this study were as follows. 1. In 12 wks before and agter running exercise at the rest time,exercise group was found to have a great decrease in TC(8%),TG(29%),LDL-C(7%) and to have a significant in crease in HDL-C(20%),FFA(74%). 2. At the rest, the control group was found to have a little decrease in TG, HDL-C,LDL-C and to have little changes in TC and FFA. 3. In 12wks before and after running exercise at the maximal exercise, the exercise group was found to have a significant decrease in TC(18%),TG(23) and to have a significant in crease in HDL-C(20%),LDL-(25%),FFA(23%) and TG and HDL-C were found to have a significant change. 4. At the maximal exerxcise , were found to have little change in the control group. 5. Apo A-I in the exercise group was found not to have the change signicantly. but to have anincrease 5% at the rest time, 6% at the maximal exercise. And the control group was almost found not to have change. 6. Statically, Apo B in the exercise group was found not to have a signficant change, but to have the increase 12%at the maximal exercise and the control group was found not to have a change.

Horseshoe Appliance에 의한 전치부 반대교합 치험예 : CASE REPORTS OF ANTERIOR CROSSBITE CORRECTION TREATED BY HORSESSHOE APPLIANCE

조은수,김수철,정규림 대한치과교정학회 1984 대한치과교정학회지 Vol.14 No.2

The present paper describes 4 clinical cases of Hellman dental age Ⅲ A group of functional Class Ⅲ malocclusion in which the horsehoe appliance was applied to obtain normal anteroposterior relationship between jaws. What is the most noteworthy in the result from the use of this appliance is that minimum down and backward rotation during backward repositioning of the mandible is noticed and the excellent retentive property in itself makers allowance for effective orthopedic correction in mixed dentition with anterior crossbite.

장기간의 40분 달리기 운동이 비만학생의 호흡순환능력과 혈청 지질에 미치는 영향

박철호,고봉민,박은경,우상헌,안민호 동아대학교 스포츠과학연구소 2000 스포츠科學硏究論文集 Vol.18 No.-

The purpose of study was to investigate the effect of 12wks before and after running exercise of obsese in D high school in Pusan city, exercise group(7) performed 12wks running exercise and control group(7), before and after subjects performed the maximal exercise test on treadmill's 12wks running exercise. Through the comparision and analysis of change respiro-circulatory and serum lipids the results of this study were as follows. 1. In 12wks before and after running exercise, physique and body composition of exercise group was found to have a great decrease in %Fat(6%), Fat(kg)(6%), Triceps(7%) and to have a significant in crease in %LBM(6%). 2. Respiro-circulatory Capacity of exorcise group at the maximal exercise, was found to have a great decrese in VE(5%), RR(8%), RQ(5%). 3. In 12wks before and after running exercise at rest time, in seam lipids of exercise group was found to have a great decrease in TC(8%), TG(29%), LDL-C(7%) and to have a significant in crease in HDL-C(20%), FFA(74%). 4. At rest time, the control group was found to have a little decrease in TG, HDL-C, LDL-C and to have little change in TC and FFA. 5. In 12wks before and after running exercise at the maximal exercise, in serum lipids of the exercise group was found to have significant decrease in TC(18%), TG(23%) and to have a significant in crease in HDL-C(20%), LDL-C(25%), FFA(23%) and TG and HDL-C were found to have a significant change. 6. At maximal exercise, was found to have little change in the control group.

TSD 半剛接 接合部를 適用한 超大型 浮遊式 上部構造物의 2次 彈性解析

宋和澈,李恩淑 韓國海洋大學校 附設 海洋科學技術硏究所 2002 硏究論文集 Vol.11 No.1

In general, the semi-rigid connections are preferred for low rise structure, If semi-rigid connections are used for superstructures of very large floating structures(VLFS), the number of rigid connections can be reduced and more economical construction will be possible. In this study, considering service load and wave load in VLFS, the applicability of mixed use of rigid and semi-rigid connections has been studied using TSD connections for a four-bay eight-story frame. ABAQUS(Finite element analysis program) is used for conduction second order elastic analysis.