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( Joo Hee Kwak ),( Gun Woo Koo ),( Sung Jun Chung ),( Dong Won Park ),( Hyun Jung Kwak ),( Ji Young Moon ),( Sang Heon Kim ),( Jang Won Sohn ),( Ho Joo Yoon ),( Dong Ho Shin ),( Sung Soo Park ),( Ju Y 대한결핵 및 호흡기학회 2014 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.118 No.-
Gastric mucosal damage by iron pills is often reported, but cases with iron pill aspiration are not common. Through oxidation of impacted iron pill, bronchial mucosal damage can proceed to chronic bronchial inflammation and necrosis, resulting endobronchial stenosis and rarely, perforation. We report a 92-year-old woman who endured chronic productive cough with significant atelectasis at left middle and lower lung field. Bronchoscopy revealed significant luminal narrowing with exudative inflammation at left main bronchus. Bronchial washing cytology showed necroinflammatory exudates and a few brown pigmented materials. Mucosal biopsy revealed diffuse brown pigments suggesting the presence of ferrous pigment, crystal deposition and marked tissue degeneration. After vigorous coughing, dark sediments were expectorated, and overall symptoms and radiological abnormalities were improved from then on. This case report is the first in our country, in spite of a few previous reports in the abroad. In conclusion, cautious observation of the aspiration-prone patients and early detection of iron pill aspiration might be important to prevent iron pill induced bronchial injury.
Sung-Il Kim,Joo Yong Kim,Do youn Kim,Ye Jin Gyeon,Jun Soo Kwak,Hak Soo Seo 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Arabidopsis E3 SUMO ligase SIZ1 (AtSIZ1) controls vegetative growth and development including responses to nutrient deficiency and environment stresses. Here, we analyzed the effect of AtSIZ1 on the stability and amount of seed proteins. Proteomic analysis showed that the amount of three major nutrient reservoir proteins, CRUCIFERIN (CRU) 1, 2 and 3, were decreased in siz1-2 mutants. However, quantitative real-time RT-PCR showed that transcript levels of CRU1, 2 and 3 genes were rather significantly higher in siz1-2 mutants than wild-type plants. Yeast two hybrid analysis revealed that AtSIZ1 interacts with CRU1, CRU2 and CRU3, strongly suggesting that CRU1, 2 and 3 proteins are sumoylated by AtSIZ1. In addition, the analysis of amino acid composition by HPLC showed that the contents of amino acids were a bit high in siz1-2 mutants. Our data indicate that AtSIZ1 plays an important function for accumulation of seed storage proteins through its ligase activity.
2010 Cleft Lip Charity Operation in Lao PDR
Jun-Bum Cho,Han-Sol Choung,Eun-Hyun Park,Eui-Hyung Hong,Hae-Jung Park,Ho-Sung Seo,Sung-Soo Park,Joo-Young Park,Ui-Lyong Lee,Eun-Suk Kim,Won Lee,Pill-Hoon Choung 대한구순구개열학회 2010 대한구순구개열학회지 Vol.13 No.1
한국얼굴기형환자 후원회 의료봉사팀은 2010년 2월 6일에서 12일까지 라오스의 수도인 Vientiane을 방문하여 구순구개열 무료수술을 무사히 마쳤다. 의료봉사팀은 총 11명으로 구성되었다. 구강악안면외과의 6명과 간호사 2명, 학생 3명이었다. 수술은 라오스 비엔찬의 Mahosot 병원에서 수술장 한개에 수술 침대를 두개 놓고, 두팀을 구성하여 수술을 진행하였다. 당시 서울대학교 치과대학 예방치학교실 백대일 교수님께서 안식년을 맞아 라오스에서 라오스인 구강건강에 관한 national survey를 수행하고 계셨는데 수술팀에게 많은 도움을 주셨다. 2월 7일 토요일 예진 때는 한국국제협력단에서 파견한 국제협력의사 박병원 선생님(내과 전문의)께서 통역으로 도와 주셨다. 총 30명의 환자가(남:여=14 : 16) 수술을 받았으며, 환자들의 평균 나이는 9.7세였다. 수술 종류는 cheiloplasty, palatoplasty, rhinoplasty, scar revision, lip reconstruction로 구분 지을 수 있었으며, 모든 수술은 합병증 없이 마무리되었다. 이번 자선수술을 통해 30명의 환자를 수술하였고, 라오스 의사들에게 구순구개열 진료에 대한 기술을 교육할 수 있었다. 또 라오스 치과대학과 자매결연을 맺는 등 한국-라오스 우호증진에 많은 기여를 한바 이를 보고한다.
Bending Strength of Korean Softwood Species for 120 × 180 mm Structural Members
Sung Jun Pang,Joo Saeng Park,Kweon Hwan Hwang,Gi Young Jeong,Moon Jae Park,Jun Jae Lee 한국목재공학회 2011 목재공학 Vol.39 No.5
The goal of this study is to investigate bending properties of domestic timber. Three representative structural timber from Larix kaempferi, Pinus koraiensis, and Pinus densiflora, in the northeastern South Korea were selected. Visual grading for the timber was conducted based on KFRI notification 2009-01 and the bending strength for the timber was evaluated based on ASTM D 198 bending. The high percentage of grade 1 and 2 for Larix kaempferi shows that the KFRI notification was optimized for this species. The bending strength distributions from Pinus koraiensis and Pinus densflora were very similar. It could be possible to specify the allowable bending properties of these two Specification using a united species group similar to spruce-pine-fir. Lastly, the bending strength of 120 × 180 mm structural members was higher than both existing values in KBC 2009 and design values for timber of imported species described in the NDS. Thus, 120 mm thick domestic sofiwoods could replace the commercial imported species and the KBC should be modified to provide design values for both timber and dimensional lumber, respectively, like NDS.
The Effects of NEES on PARP Expression and Cell Death in Rat Cerebral Cortex After Ischemic Injury
Sung Won Kim,Jung Sook Lee,Ki Mai Um,Ji Sung Kim,Suk Hee Lee,Yoo Rim Choi,Nyeon Jun Kim,Bo Kyoung Kim,Mi Suk Cho,Joo Hyun Park,Soon Hee Kim 국제물리치료학회 2010 Journal of International Academy of Physical Ther Vol.1 No.2
The majority of strokes are caused by ischemia and result in brain tissue damage, leading to problems of the central nervous system including hemiparesis, dysfunction of language and consciousness, and dysfunction of perception. The purpose of this study was to investigate the effects of Poly(ADP-ribose) polymerase(PARP) on necrosis in neuronal cells that have undergone needle electrode electrical stimulation(NEES) prior to induction of ischemia. Ischemia was induced in male SD rats(body weight 300g) by occlusion of the common carotid artery for 5 min, after which the blood was reperfused. After induction of brain ischemia, NEES was applied to Zusanli(ST 36), at 12, 24 and 48 hours. Protein expression was investigated using immuno-reactive cells, which react to PARP antibodies in cerebral nerve cells, and Western blotting. The results were as follows: In the cerebral cortex, the number of PARP reactive cells after 24 hours significantly decreased(p<.05) in the NEES group compared to the GI group. PARP expression after 24 hours significantly decreased(p<.05) in the NEES group compared to the GI group. As a result, NEES showed the greatest effect on necrosis- related PARP immuno-reactive cells 24 hours after ischemia, indicating necrosis inhibition, blocking of neural cell death, and protection of neural cells. Based on the results of this study, NEES can be an effective method of treating dysfunction and improving function of neuronal cells in brain damage caused by ischemia.
Sang-Taek Lee,Hee-Jun Kim,Ju-hee Cho,Daesuk Joo,Dae-kyong Kim 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
This paper reports an investigation of pulse width modulation (PWM) techniques for twophase brushless DC (BLDC) motors fed by a two-phase eight-switch inverter in a fan application. The three-phase BLDC motor is widely applied in industry; however, a lower-cost two-phase BLDC motor and drive circuit has been greatly in demand in recent years. In this paper, we introduce a mathematical model of the two-phase BLDC motor with sinusoidal back electromotive forces (EMFs) based on traditional three-phase BLDC motors. To simplify the drive algorithm and speed up its application, we analyze the principle of block commutation for a two-phase BLDC motor drive in the 180-electricaldegree conduction mode, and we further propose five PWM schemes to improve the commutation performance of the two-phase BLDC drive. The effectiveness of the proposed PWM methods is verified through experiments.
Joo Bio,Park Mina,Ahn Sung Jun,Suh Sang Hyun 대한영상의학회 2023 Korean Journal of Radiology Vol.24 No.5
Objective: Meningeal lymphatic vessels are predominantly located in the parasagittal dural space (PSD); these vessels drain interstitial fluids out of the brain and contribute to the glymphatic system. We aimed to investigate the ability of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in assessing the dynamic changes in the meningeal lymphatic vessels in PSD. Materials and Methods: Eighteen participants (26–71 years; male:female, 10:8), without neurological or psychiatric diseases, were prospectively enrolled and underwent DCE-MRI. Three regions of interests (ROIs) were placed on the PSD, superior sagittal sinus (SSS), and cortical vein. Early and delayed enhancement patterns and six kinetic curve-derived parameters were obtained and compared between the three ROIs. Moreover, the participants were grouped into the young (< 65 years; n = 9) or older (≥ 65 years; n = 9) groups. Enhancement patterns and kinetic curve-derived parameters in the PSD were compared between the two groups. Results: The PSD showed different enhancement patterns than the SSS and cortical veins (P < 0.001 and P < 0.001, respectively) in the early and delayed phases. The PSD showed slow early enhancement and a delayed wash-out pattern. The six kinetic curve-derived parameters of PSD was significantly different than that of the SSS and cortical vein. The PSD washout rate of older participants was significantly lower (median, 0.09; interquartile range [IQR], 0.01–0.15) than that of younger participants (median, 0.32; IQR, 0.07–0.45) (P = 0.040). Conclusion: This study shows that the dynamic changes of meningeal lymphatic vessels in PSD can be assessed with DCE-MRI, and the results are different from those of the venous structures. Our finding that delayed wash-out was more pronounced in the PSD of older participants suggests that aging may disturb the meningeal lymphatic drainage.