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균기산(勻氣散)이 흰쥐의 국소뇌혈류량 및 평균혈압에 미치는 효과
정종안,홍석,전상윤,Jung, Jong-An,Hong, Seok,Jun, Sang-Yun 대한한의학방제학회 2007 大韓韓醫學方劑學會誌 Vol.15 No.2
Kyungisan (KGS) has been used in oriental medicine for many centuries as a therapeutic agent for treatment of stroke caused by deficiency of qi(氣虛). This study was performed to evaluate effects of KGS extract on the regional cerebral blood flow(rCBF) and mean arterial blood pressure(MABP) in rats. The result of this study were as follow ; 1. KGS significantly increased rCBF irrelevant to MABP in normal rats, 2. To prescribe KGS after pretreatment with indomethacin(IDN) decreased rCBF as compared with control group to administered only KGS in normal rats. But the change of MABP is not significantly as compared with control group. 3. To prescribe KGS after pretreatment with methylen blue( MTB) decreased MABP and rCBF as compared with control group to administered only KGS in normal rats. Especially, it significantly decreased rCBF. These results suggest that KGS increase rCBF by enlargement diameter of pial artery in brain. The active mechanism of KGS is related with prostaglandin activated by cyclooxygenase. So, I suggest that KGS has an anti-ischemic effect through the improvement of cerebral blood flow and can be used for stroke.
Transcranial Doppler Ultrasonography(TCD)의 참고치와 변화 요인들과의 연관성
정종안,조국령,김남욱,강철식,전상윤,홍석,Jung, Jong-An,Cho, Gook-Ryung,Kim, Nam-Uk,Kang, Chul-Sik,Jeon, Sang-Yun,Hong, Seok 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.4
Objective : We present reference values of flow velocities of intracranial and extracranial cerebral arteries and relation with change factor. Method : We checked transcranial Doppler ultrasonography on mean velocity, systolic velocity, pulsatility index, and resistance index of 252 patients. We also compared differences of change factor. Result : The result showed a difference by sex and age and relevance between vessels besides mean velocity of vessels related with past history and social history. Conclusion : According to the above results, females showed higher velocity of all vessels. With advancing age, subjects showed reduction in velocity and increase in pulsatility index and resistance index. Anterior cerebral, middle cerebral, and posterior cerebral artery increased in proportion to velocity of internal carotid artery and basilar artery. Vessel velocity correlated with diabetes mellitus, hypertension and hyperlipidemia.
테라헤르츠파를 이용한 허니컴샌드위치 복합재 패널의 FFT 스캔이미지 비파괴탐상기법
정종안 ( Jong-an Jung ),( D. K. Hsu ),임광희 ( Kwang-hee Im ) 조선대학교 공학기술연구원 2017 공학기술논문지 Vol.10 No.2
In recent years, the importance of terahertz waves (T-ray) has been recognized for detecting defects. With the characterization of Fiber reinforced plastics (FRP) composites the T-ray techniques have been applied. The present study deals with THz scan images of honeycomb sandwich composite panels using a refractive index (n) and electrical conductivity of glass fiber embedded epoxy matrix composites and carbon fiber reinforced plastics (CFRP) skin. A method of detection of FRP composites with impact damage is presented and also aluminum wires could be detected when woven carbon fibers are twisted with conductivity. Thus, a level of transmitted power of THz waves in CFRP composites was compared with that of glass fiber composites quantitatively on the basis of electric field (E-field) in the fiber direction to evaluate a level of transmission of THz according to frequency bandwidth. Based on the T-ray characteristics, a FFT scan image method is proposed, which could detect impact damage on the honeycomb sandwich panels and also a test valid region of THz waves is evaluated for detecting aluminum wires according to carbon fiber orientation when the aluminum wires were inserted with woven carbon fibers on the surface of honeycomb sandwich panels.
정종안 ( Jong An Jung ),황우채 ( Woo Chae Hwang ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.1
Important issues in the design of the vehicles could be represented such as reducing CO2 emissions and improving the fuel economy. However, vehicle safety is ensured in a state in which the design is to reduce the weight of vehicle weight reduction for the wings to be made. In this study, a representative of lightweight material CFRPs (carbon fiber reinforced plastic), thin-walled members using the CFRPs were studied after the collapse crash. Also, experimental investigations are carried out for the CFRP thin-wall member and in order to study the effect of various stacking condition. Static and impact collapse tests were performed with change of the interface numbers, such as fiber orientation angle. Collapse modes and energy absorption characteristics had been analyzed.
과민성(過敏性) 대장증후군(大腸症候群)에 대한 문헌적(文獻的) 고찰(考察)
조윤성,정종안,홍광해,정경아,Cho, Yoon-Sung,Jung, Jong-An,Hong, Gwang-Hae,Jeong, Kyoung-Ah 대한한의학방제학회 2006 大韓韓醫學方劑學會誌 Vol.14 No.2
Objective & Methods : Irritable Bowel Syndrome is occurred frequently in daily life. Nevertheless. medical treatment of the Irritable Bowel Syndrome is almost dependent on western cure, but that cure is not effective enough. So we chose the oriental medicine textbook that were dealing with the oriental concept and the treatment of Irritable Bowel Syndrome. we got these results. Results were as follows : 1. Irritable Bowel Syndrome is characterised by recurrent or chronic abdominal pain, with distension, disturbed defecation and psychic problems without organic lesions. 2. The etiology of Irritable Bowel Syndrome include stress. disharmony of liver and spleen, the coldness of spleen and kidney and the lack of qi or yin, etc. 3. The oriental treatments of Irritable Bowel Syndrome are warming spleen and kidney, easing liver and stopping diarrhea. 4. The internal medication of Irritable Bowel Syndrome was the most used 11 times Tongsayobang(痛瀉要方) and 10 times Yijungtang(理中湯). 5. The most many used herb were Atractylodjs macrocephalae rhjzoma(白朮), Gjnseng Radix (人蔘), Cjnnamomj Cortex(肉桂), Polyporus(猪笭), etc.