Compound odontoma에 관한 증례보고

주훈,백남규,백병주 大韓小兒齒科學會 1990 大韓小兒齒科學會誌 Vol.17 No.2

Odontomas are probably the most common of the odontogenic tumors, and have been defined as “a tumor composed of dentin and enamel in which pulp and cementum also are present.” Clinically, although odontomas may be discovered at any age, they developed at the same time normal odontogenic structures are differentiating. Odontomas are slow growing, nonpainful lesion that may cause local enalargement and frequently interfere with normal tooth eruption. Radiographically, odontomas are usually situated between the roots of teeth and appear either as an irregular mass of calcified material surrounded by a narrow radiolucent band with a smooth outer periphery, or as a variable number of toothlike structure with the same peripheral outline. The treatment of the odontoma is surgical removal, and there is no expectany of recurrence.

Vibrational Spectroscopy of Sulfur-Containing Silicon-Rich Silicon-Oxide Films Fabricated via a Coevaporation Technique

Byeong-Kyou Jin,최용규 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.3

We have fabricated sulfur-containing silicon-rich silica thin films by using a coevaporation technique. Transmission spectra in the infrared region indicated the presence of S atoms participating in the silica networks via Si-S bonds while absorption spectra in the ultraviolet/visible region proved that some of the S atoms were present in the form of S2 and S3 molecules. The optical bandgap energy was inversely proportional to the number of sulfur atoms incorporated. The structural evolution of the thin lms is discussed in connection with the S concentration. We have fabricated sulfur-containing silicon-rich silica thin films by using a coevaporation technique. Transmission spectra in the infrared region indicated the presence of S atoms participating in the silica networks via Si-S bonds while absorption spectra in the ultraviolet/visible region proved that some of the S atoms were present in the form of S2 and S3 molecules. The optical bandgap energy was inversely proportional to the number of sulfur atoms incorporated. The structural evolution of the thin lms is discussed in connection with the S concentration.

Solution-based fabrication of germanium sulphide doped with or without Li ions for solid electrolyte applications

Byeong Kyou Jin 한양대학교 세라믹연구소 2012 Journal of Ceramic Processing Research Vol.13 No.S1

Ge-S and Li-Ge-S powders were synthesized via solution-based process in order to employ chalcogenide-based solid electrolyte for use in Li secondary batteries. GeCl4 and thioacetamide in combination result in Ge-S powders of which major crystalline phase becomes GeS2 where the tetragonal and orthorhombic phases coexist after heat treatment. A chemical treatment using NaOH brings about the reduction of chlorine in the powders obtained. However, the heat treatment at 300 ο C is more effective in minimizing the chlorine content. When lithium chloride is used as the precursor of Li ions, the LiCl powders are agglomerated with an inhomogeneous distribution. When Li2S is used, the Li-Ge-S powders are distributed more uniformly and the orthorhombic GeS2 phase dominates in the powders.

Vibrational Spectroscopy of the Sulfur-Containing Silicon-Rich Silicon Oxide Films Fabricated Via Coevaporation Technique

Byeong Kyou Jin,Yong Gyu Choi 한국표면공학회 2008 한국표면공학회 학술발표회 초록집 Vol.2008 No.-

회전체 스트레스 정보를 이용한 터빈 축 피로수명 평가

진병규(Byeong Kyou Jin),박기범(Ki Beom Park),채장범(JangBom Chai) 대한기계학회 2014 大韓機械學會論文集A Vol.38 No.4

원자력 발전소의 터빈-발전기 시스템과 같이 일정한 토크와 함께 축 진동에 의한 가변 응력이 인가되는 부재의 경우 비틀림 응력에 의한 피로 파괴 거동을 보인다. 따라서 본 연구에서는 터빈-발전기의 터빈 축에 인가하는 비틀림 응력을 측정하고 응력에 의해 발생하는 피로 파괴 거동을 분석하는 것을 목적으로 하였다. 이를 위해 터빈-발전기 시스템과 같은 실험 장치를 제작하고 임의의 부하를 인가하여 다양한 비틀림 응력에 대한 피로 파괴 거동을 평가하였다. 특히 기존의 알려진 피로 거동 평가 방법인 응력-수명, 변형률-수명, 균열성장 평가 방법을 동시에 적용하여 평가를 진행하였다. 부하의 크기가 증가하면서 평가 방법과 무관하게 피로 수명이 감소하는 경향이 확인하였으며 5 kV 부하 인가 시 최대 10배의 피로 수명의 감소가 발생하였다. The equipment or with a constant torque and a variable stress due to axial vibration such as the turbine-generator system in nuclear power plant show the fatigue fracture behavior. Thus this study whoul aim to measure the torsional stress and analyze the fatigue fracture behavior. To achieve this, we manufactured the equipment similar with turbine-generator system and applied various torsional vibration stress due to external load. In particular, the evaluation was conducted with the existing evaluation methods of the fatigue behavior of known stress-life, strain-life, crack growth assessment methods. With increasing the external load and independent methods tends to decrease the fatigue life was confirmed up to 10 times in 5 kV external load compared to without external load.

히스티딘 중합체가 일차배양 기도 상피세포에서의 뮤신 유리에 미치는 영향

전병규(Byeong Kyou Jeon),윤인대(In Dae Yun),이재우(Jae Woo Lee),이충재(Choong Jae Lee) 대한약학회 2010 약학회지 Vol.54 No.5

We investigated whether poly-L-histidine (PLH) significantly affect mucin release from cultured airway epithelial cells. Confluent primary hamster tracheal surface epithelial (HTSE) cells were metabolically radiolabeled with 3H-glucosamine for 24 hr and chased for 30 min in the presence of PLH to assess the effect on 3H-mucin release. PLH 9,850 and PLH 6,700 specifically inhibit mucin release from airway goblet cells without significant cytotoxicity. This finding suggests that poly-L-histidine might function as an airway mucoregulative agent.

Deformation of Amorphous GeSe₂ Film under Uniaxial Pressure Applied at Elevated Temperatures

Jin, Byeong Kyou,Lee, Jun Ho,Yi, Jeong Han,Lee, Woo Hyung,Shin, Sang Yeol,Choi, Yong Gyu The Korean Ceramic Society 2015 한국세라믹학회지 Vol.52 No.2

In an effort to evaluate the practicability of an imprinting technique for amorphous chalcogenide film in Ge-based compositions, we investigate the deformation behavior of the surface of amorphous $GeSe_2$ film deposited via a thermal evaporation route according to varying static loads applied at elevated temperatures. We observe that, under these static loading conditions, crystallization tends to occur on its surface relatively more easily than in As-based $As_2Se_3$ films. As for the present $GeSe_2$ film, higher processing temperatures are required in order to make its surface reflect the given stamp patterns well; however, in this case, its surface becomes partially crystallized in the monoclinic $GeSe_2$ phase. The increased vulnerability of this amorphous $GeSe_2$ film toward surface crystallization under static loading, when compared with the $As_2Se_3$ counterpart, is explained in terms of the topological aspects of its amorphous structure.

자기공명영상과 단일광자방출단층영상을 재구성한 Hybrid 영상에 관한 연구

전병규 ( Byeong Kyou Jeon ) 한국위생과학회 2006 한국위생과학회지 Vol.12 No.2

고 에너지 X-선이 새싹식물 종자의 생장에 미치는 영향

전병규(Byeong-Kyou Jeon),여진동(Jin-Dong Yeo) 한국방사선학회 2017 한국방사선학회 논문지 Vol.11 No.6

본 연구는 고 에너지 X-선을 조사한 새싹식물 종자를 파종 및 재배하여 산도, 염도, 당도, 당산비의 변화를 분석하고 식물의 생장에 미치는 영향을 알아보고자 하였다. 새싹식물 6종의 종자에 각 종자별로 대조군 1개군과 실험군 4개군을 구성하여 6MV X-선을 0, 2, 5, 8, 10 Gy 각각 조사하였다. 조사된 종자들을 파종하고 재배하여 식물의 액을 추출 및 성분분석을 실시하였다. 무순과 적무의 산도는 모두 증가하였고, 청경채와 메밀은 산도가 평균적으로 감소하였다. 다른 종자의 실험 군은 대조군과 비슷한 산도로 분석 되었다 새싹식물의 염도, 당도는 평균적으로 감소하였으나, 적무의 염도는 2배 증가하였고, 수분 함량이 높은 콩나물은 당도가 모두 증가하였다. 따라서 고 에너지 X선은 식물의 성분에서 염기성 이온을 생성하고, 수분 함량이 높은 식물은 방사선 감수성이 높아 생장에 영향을 받아 과산화물이 생성되어 식물의 성분 변화에 영향을 미친다고 판단된다. 향후 고 에너지 방사선의 조사에 따른 식물성분의 변화 원인을 알아내기 위한 지속적인 유전학적 연구가 필요할 것이다. This study examined the irradiation effect of high energy x-rays on the growth of sprout plants seeds. particularly with regard to acidity, salinity and sugar content change. The experimental groups were one day old sprout plants seeds irradiated with 6MV x-rays at doses of 2, 5, 8, 10 Gy using a linear accelerator. The control group was not irradiated. After two weeks, sprout plants were grown and harvested for component analysis. The acidity of the x-ray irradiated radish and red radish groups were significantly higher than that of the control group and bok choi and buckwheat groups lower than that of the control group. The salinity and sugar content of the x-ray irradiated 5 groups were significantly lower than that of the control group and Soybean and Red radish groups higher than that of the control group. The cause of plants component change were estimated to have occurred by generate basic ions and radiation sensitivity by moisture content. Further genetic studies will be needed to confirm the correlation between high energy x-rays and the cause of plants component change.

X선 조사가 닭 유정란 부화과정에 미치는 영향

전병규(Jeon, Byeong-Kyou),여진동(Yeo, Jin-Dong) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.12

방사선 감수성이 높은 시기의 닭 유정란에 방사선치료용 선형가속장치를 이용하여 고 에너지 X선을 조사하 고, 부화과정 및 생존율, 외형적 기형, 혈액세포의 변화를 관찰하여 방사선 조사가 유정란 부화과정에 미치는 영향에 대하여 연구 하고자 하였다. 방사선 감수성이 가장 높을 것으로 예상 되는 5일째에 고 에너지 10 MV-X선을 5개의 유정란을 한 군으로 설정한 실험군에 각각 5, 7.5, 10 Gy를 조사하고 부화기에 입란 하였다. 매일 검란을 실시하여 20일간의 부화과정을 관찰하고 부화 예정 1일 전에는 방사선촬영을 실시하여 부화상태와 전체 골격 형성을 확인하였 다. 부화 된 병아리는 방사선촬영과 혈액분석을 실시하였다. 부화율은 대조군과 실험군에서 각각 80, 46.7%이고, 조사 선량 별 부화률은 대조군과 5, 7.5, 10 Gy 에서 각각 80, 100, 40, 0% 로 조사선량이 증가 함에 따라 부화율은 감소 하였다. 기형발생률은 대조군과 실험군에서 각각 0, 60% 이다. 조사선량 별 기형 발생률은 5, 7.5, 10 Gy 에서 각각 20, 80, 80% 이다. 미부화란의 인공 파각 후 좌측날개, 안구돌출, 발, 목뼈 기형이 나타났으며, 조사선량이 증가함에 따라 기형발생률이 증가 하였다. 백혈구 평균치는 대조군, 5, 7.5 Gy에서 각각 87.64, 100.76, 81.42 (103/uL) 으로 나 타났다. 고에너지 X선에 의한 직, 간접적 손상인 부리 이상, 눈 결손, 계태사, 혈액성분의 변화를 확인 하였다. 특히 조사선량이 높을수록 부화율과 백혈구의 평균수치가 감소하였으며, 기형의 발생률과 계태사가 증가 하였다. 기형 발 생의 원인은 염색체 이상으로 추정된다. 향후 고 에너지 X선 조사에 따른 기형의 원인을 알아내기 위한 지속적인 유 전학적 연구가 필요할 것이다. This study examined the irradiation effect of high energy x-rays on the hatching process of fertilized eggs, particularly with regard to malformation and blood cells change. The experimental groups were five day old fertilized eggs irradiated with x rays at doses of 5, 7.5, 10 Gyusing alinear accelerator. The control group was not irradiated. After three weeks, hatched chicks were sacrificed and examined for blood sampling. The survival rate of the x-ray irradiated groups were significantly lower than that of the control group( 46.7vs 80%). The malformation rate of the experimental groups was60%, whereas no congenital malformations were observed in the control group. The experimental groups had a significantly higher malformation rate. The types of malformation were left wing defect, proptosis, microcephaly, cervical spine, and feet anomaly. The incidence of malformationincreased with increasing radiation dose. The white blood cell count of control group and eachexperimental groups (5 and 7.5 Gy) were 87.64, 100.76 and 81.42 (103/μL), respectively. X-ray irradiation of 5 day old chick embryos increased the rate of death and malformation significantly.The malformations wereestimated to have occurred by chromosomal abnormalities. Further genetic studies will be neededto confirm the correlation between high energy X-rays and the cause of malformations.