Comparison of trophic factors changes in the hippocampal CA1 region between the young and adult gerbil induced by transient cerebral ischemia.

Yan, Bing Chun,Park, Joon Ha,Kim, Sung Koo,Choi, Jung Hoon,Lee, Choong Hyun,Yoo, Ki-Yeon,Kwon, Young-Geun,Kim, Young-Myeong,Kim, Jong-Dai,Won, Moo-Ho Kluwer Academic/Plenum Publishers 2012 Cellular and molecular neurobiology Vol.32 No.8

<P>In the present study, we investigated neuronal death/damage in the gerbil hippocampal CA1 region (CA1) and compared changes in some trophic factors, such as brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF) and vascular endothelial growth factor (VEGF), in the CA1 between the adult and young gerbils after 5 min of transient cerebral ischemia. Most of pyramidal neurons (89%) were damaged 4 days after ischemia-reperfusion (I-R) in the adult; however, in the young, about 59% of pyramidal neurons were damaged 7 days after I-R. The immunoreactivity and levels of BDNF and VEGF, not GDNF, in the CA1 of the normal young were lower than those in the normal adult. Four days after I-R in the adult group, the immunoreactivity and levels of BDNF and VEGF were distinctively decreased, and the immunoreactivity and level of GDNF were increased. However, in the young group, all of their immunoreactivities and levels were much higher than those in the normal young group. From 7 days after I-R, all the immunoreactivities and levels were apparently decreased compared to those of the normal adult and young. In brief, we confirmed our recent finding: more delayed and less neuronal death occurred in the young following I-R, and we newly found that the immunoreactivities of trophic factors, such as BDNF, GDNF, and VEGF, in the stratum pyramidale of the CA1 in the young gerbil were much higher than those in the adult gerbil 4 days after transient cerebral ischemia.</P>

40세 이하 관상동맥 질환자에서 장기적 임상 관찰

이승욱,정명호,박종철,박형욱,조상희,김원,김계훈,이상현,강경태,조장현,김남호,김건형,안영근,조정관,박종춘,강정채 全南大醫大 2001 전남의대학술지 Vol.37 No.2

영골(靈骨).강압혈(降壓穴) 자극(刺鍼)이 혈압(血壓)에 미치는 영향(影向)

임영남,심성용,한지완,고호연,박종형,한양희,전찬용,김동우,Yim, Young-Nam,Sim, Sung-Yong,Han, Ji-Wan,Ko, Ho-Yeon,Park, Chong-Hyeong,Han, Yang-Hee,Chun, Chan-Yong,Kim, Dong-Woo 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.2

Objective : The purpose of this study is to evaluate the clinical effect of the non-pharmacological anti-hypertension method, acupuncture, for hypertensive patients. Methods : 26 patients diagnosed with hypertension were each treated by one of three methods: an anti-hypertension drug(adalat soft capsule), venepuncture, and acupuncture. In cases of rising blood pressure, patients were treated by their one of the three methods, and blood pressure was measured at regular intervals. Result : As for the group of acupuncture treated patients on Young-gol(ling-gu) and Gang-ap-hyul(jiang-ya-xue), readings dropped 18.0mmHg in systolic blood pressure and 6.50mmHg in diastolic blood pressure. This was a greater effect than that seen in the venepuncture treated patients. Blood pressure checked one hour after acupuncture treatment showed a greater difference than blood pressure checked after thirty minutes. Conclusion : Safe reductions in blood pressure were observed through the non-pharmacological method of acupuncture on Young-gol(ling-gu) and Gang-ap-hyul(Jiang-ya-xue).

Shelf Life Determination of Precooked Frozen Meat Dumplings

Lee, Young-Chun,Yang, Hyung-Sub,Kim, Dong-Ho 한국산업식품공학회 2002 산업 식품공학 Vol.6 No.3

Quality of frozen foods is significantly affected by the storage temperature and tie, and the consumers' demand for safe quality frozen foods is increasing. The objective of this research was to estimate the shelf life of frozen cooked meat dumplings, based on the changes in the selected physico-chemical and sensory quality attributes. Precooked frozen meat dumplings sampled from the same lot produced at a frozen food company in Seoul were stored at -10, -15, and -20℃. The meat dumplings sampled at 3- to 4-week intervals were subjected to the determination of volatile basic nitrogen (VBN), thiobarbituric acid (TBA), peroxide value (POV), surface color and shear value after thawing at 5℃ for 15 h. High quality life (HQL) was determined through the triangle test and practical quality life (PQL) through the scoring test. VBN, TBA and POV increased as the storage period was increased. HQL of the frozen meat dumplings were 189 and 252 days at -10 and -15℃, respectively. The estimated PQL were 349, 475, and 491 days at -10, -15, and -20 ℃, respectively. Statistical analysis indicated that there were significant relationships between sensory scores and VBN and POV of the stored meat dumplings. VBN was selected as the most reliable objective quality index for the shelf life determination (PQL) of the precooked frozen meat dumplings.

조기발병형 파킨슨병환자와 정상인의 호흡 및 발성 특성 비교

전은애(Eun Ae Chun),손영호(Young Ho Shon),백승재(Seung Jae Baek),이필휴(Phil Hyu Lee),남정모(Chung Mo Nam),이지은(Ji Eun Lee),최예린(Yaelin Choi) 한국언어청각임상학회 2010 Communication Sciences and Disorders Vol.15 No.4

배경 및 목적: 파킨슨병은 호흡과 발성에 영향을 준다. 49세 이전에 발병하는 조기발병형 파킨슨병(young-onset parkinson’s disease: YOPD, 이하 YOPD)도 호흡과 발성에 문제가 있는지 보기 위해 정상군과 비교하여 살펴보고자 하였다. 또한 파킨슨병 환자의 음성에 관한 연구는 있었지만 YOPD 환자의 음성특성에 대한 호흡과 발성 기능에 대해서 연구된 선행연구는 찾아보기 어렵다. 방법: YOPD 환자군 6명과 빈도대응 시킨 정상군 6명을 대상으로 호흡기능 평가를 위하여 MicroQuarkⓇ를 이용하여 노력성 폐활량(forced vital capacity: FVC, 이하 FVC), 1초간 노력성 호기량(forced expiratory volume at one second: FEV1, 이하 FEV1)과 1초간 노력성 호기량의 노력성 폐활량에 대한 비(이하 FEV1/FVC)를, 음향학적인 평가를 위하여 Multi-Dimentional Voice Program(이하 MDVP)를 이용하여 주기간 주파수 변동률 (이하 jitter)과 주기간 진폭 변동률(이하 shimmer)을, 공기역학적인 평가를 위하여 Phonatory Aerodynamic System(이하 PAS)를 이용하여 평균호기류율(mean airflow rate: MFR, 이하 MFR)과 성문하압(subglottal pressure: Psub, 이하 Psub)을, MDVP를 이용하여 최대발성지속시간(maximum phonation time: MPT, 이하 MPT)을 측정하고 분석하였다. 이비인후과 전문의사가 후두 스트로보스코피(stroboscopy)를 통해 후두의 병리 유무를 평가하였다. 두 집단의 호흡기능, 발성기능의 차이는 맨-휘트니 U검정(Mann-Whitney U-test)을 실시했다. 결과: MPT는 YOPD 환자군에 비하여 정상군이 통계적으로 유의하게 길었고, jitter와 shimmer는 정상군에 비하여 YOPD 환자군이 통계적으로 유의하게 컸다. 그러나 두 군간의 FVC, FEV1, FEV1/FVC, MFR, Psub은 통계적으로 유의한 차이가 없었다. 논의 및 결론: 두 집단 간의 호흡기능에서 차이가 없고 YOPD의 MPT, jitter, shimmer가 정상범주를 벗어나 차이가 있다. 이들 변수들이 YOPD의 음성적 진단, 치료계획과 예후를 판단하는데 도움이 될 것이다. 따라서 본 연구는 ‘연령’이라는 혼란변수를 배제하고 파킨슨병의 음성 특성을 규명 하는데 의의가 있다고 할 수 있다. Background & Objectives: Parkinson’s disease affects respiration as well as phonation. Young-onset Parkinson’s disease (YOPD) can occur even before the age of 49 years. The present study selected YOPD patients in such a manner as to exclude the confounding variable of ‘age’ and thus examine the vocal characteristics of Parkinson’s disease solely. We aimed to compare the respiration function and phonation characteristics of these YOPD patients with a normal group. Methods: The present study’s subjects included a YOPD group comprised of 6 patients whose chronological ages were between 38 and 49 years and onset ages were prior to 49 years, and a normal group comprised of 6 subjects selected by frequency-matching. For testing respiration function, FVC, FEV1 and FEV1/FVC were measured using Cosmed’s MicroQuarkⓇ as a basic test for the ventilation function of the lung. For vocal sampling, the Multi-Dimensional Voice Program (MDVP) and the Advanced Model 5105 of KayPENTAX’s Computerized Speech Lab (CSL) Model 4400 were used to analyze maximum phonation time (MPT), jitter, and shimmer. Additionally, KayPENTAX’s Phonatory Aerodynamic System (PAS) 4500 was utilized to analyze mean air flow rate (MFR) and subglottal pressure (Psub). Otolaryngologists and neurologists participated in the research cooperatively, and the otolaryngologists assessed the presence of laryngeal disease directly through larynx stroboscopy in the all subject. Mann-Whitney’s U test was used to analyze the difference between the 2 groups’ respiration and phonation function. Results: The MPT was longer in the normal group than YOPD patient group, and both jitter and shimmer were larger in the YOPD patient group than the normal group; both of these differences were statistically significant. However, there was no statistically significant difference in FVC, FEV1, FEV1/FVC, MFR, and Psub. Discussion & Conclusion: The 2 groups’ respiration function did not differ, and YOPD patients’ MPT, jitter, and shimmer differed beyond the normal range. Thus, these variables will help in YOPD patients’ phonation diagnosis and therapeutic plans or prognosis. Although there have been studies on the phonation of Parkinson’s disease patients, limited advanced research can be found on the respiration and phonation function of YOPD patients’ vocal characteristics. The results of this study are meaningful and provide a better understanding of Parkinson’s disease because the subjects were selected such that confounding by age was avoided.

일산화탄소 및 고압산소의 폭로가 흰쥐의 제2형 폐포세포와 사구체에 미치는 영향에 관한 연구

백두진,정호삼,이계훈,황세진,전영호,전영희 한양대학교 의과대학 1997 한양의대 학술지 Vol.17 No.2

The present study was performed to investigate the ultrastructural changes of the type Ⅱ pneumocyte in the lung and that of the glomerulus in the kidney after carbon monoxide(CO) or hyperbaric oxygen (HBO) exposure. The male Sprague-Dawley rats, weighing about 200gm, were used as experimental animals. The animals were divided into CO exposure group, air exposure after CO exposure group, HBO exposure group and HBO exposure after CO exposure group. After single CO and HBO exposure (3790ppm), the specimen of lung and kidney were obtained. According to routine method, EM preparations were made and observed with electron microscope. The results obtained were as follows ; 1. Slight disruption of the mitochondrial membrane was observed in alveolar type Ⅱ pneumocyte, after single CO exposure. 2. In all experimental groups except CO exposure group, decrease in number and atropy of rough endoplasmic reticulum, disruption of double membrane and crista of mitochondria and vacuolar degeneration of lamellar bodies in alveolar type Ⅱ pneumocytes were observed. 3. In all experimental groups, fusion of the pedicles of podocytes, and obliterations of the endothelial fenestrations were observed. These results suggested that CO and HBO exposure may induced the ultrastructural damages in the alveolar type Ⅱ pneumocyte and the glomerulus.

使用時簡 比例 保證政策에 따른 設備代替 時期決定

全永鎬 弘益大學校 科學技術硏究所 1992 科學技術硏究論文集 Vol.2 No.-

This paper determines the optimal replacement time for a system with imperfect corrective maintenance operations under pro-rata warranty policy. The failureqr rateq after corrective maintenance lies between the states as good as new and as bad as old. Numerical examples using the Weibull case are presented.

PASS정책 하에서 예비검사량 결정

全永鎬 弘益大學校 1987 弘大論叢 Vol.19 No.2

This paper determines an optimal preliminary sample size under price adjusted to a single sampling plan from the producer's point of view. Price adjusted to a single sampling plan is based an a sample size n drawn randomly from a population of N units. The price is determined by the number of defects found in the sample. This preliminary sample size is affected by the percent defectives, preliminary inspection cost, price of the non-defectives, and preliminary replacement cost.

저공해 사이클론 연소기 설계를 위한 유동해석 연구

전영남,백원석,김승호,김미환 조선대학교 환경공해연구소 2001 環境公害硏究 Vol.17 No.2

가속수명 시험을 통한 PWB의 제품 신뢰성 평가 연구

全永鎬,權彛章 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

This paper describes a highly accelerated life test (HALT, USPCBT) method for rapid qualification testing of STH PWB(Silver Through Hole Printed Wire Boards). This method was carried to be an alternative to the present time-consuming standard 1344 hours life testing(THB). The accelerated life test conditions were 121℃ 95%R. H. at 50V bias and without bias. Their results are compared with those observed in the standard 1344 hours life test at 40℃/95%R.H. at 50V bias and without bias. The studied were focused on the samples' time-to-failure as well as the associated conduction and failure mechanism. The abrupt drop of insulation resistance is due to the absorption of water vapour. And the continuous drop of insulation resistance is due to the Ag migration. The ratio of time-to-failure of HALT(USPCBT) samples to THB was 25 and 11 at 50V bias and without bias respectively.