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Seung Ho Lee,Hwa Jeung Lee,In Jeoung Baek,Jung Min Yon,Sang Yoon Nam,Beom Jun Lee,Young Won Yun,Yun-Bae Kim,Seock Yeon Hwang,Jin Tae Hong 한국실험동물학회 2006 Laboratory Animal Research Vol.22 No.1
Scalp hair loss has increased recently in young-aged people as well as middle-aged people, and although there are no serious in health problems, scalp hair loss may significantly affect a variety of psychological and social experiences and the individual's quality of life. DREAMMO scalp lotion is composed of several plant extracts which are known to be used as oriental medicine to prevent hair loss or promote hair growth in alopecia. This study was carried out to investigate the effect of DREAMMO scalp lotion on hair growth in an alopecia model of C57BL/6 mice. Mice were divided into three experimental groups including control, DREAMMO scalp lotion and 3% Minoxidil (MXD). The test compounds were topically treated with 0.2 ㎖ per mouse per day for 4 weeks. The hair growth was determined photographically and histologically in an alopecia model of C57BL/6 mice. After 3-4 weeks, DREAMMO scalp lotion significantly increased hair growth compared to the controls in the dorsal skin of C57BL/6 mice. DREAMMO scalp lotion also promoted the elongation of hair follicles than the controls. These results suggest that DREAMMO scalp lotion has a hair growth activity and can be useful for the treatment of alopecia.
용해실리카의 기준경도를 이용한 나노 압입시스템의 실험적 교정
이윤희 ( Yun Hee Lee ),안승민 ( Seung Min Ahn ),김주영 ( Ju Young Kim ),박찬평 ( Chan Pyung Park ),장희광 ( Hee Kwang Jang ) 대한금속재료학회(구 대한금속학회) 2015 대한금속·재료학회지 Vol.53 No.3
Indirect calibration of a nanoindentation system was performed by deriving a reference loading curve. This reference load-depth relationship was accomplished by assuming a perfect nanoindentation test on an ideal reference material; if all components in a nanoindentation system are well calibrated and the reference material has unique hardness and Young’s modulus, the indentation depth can be formulated with a function of the indentation load having two parts of contact and surrounding elastic depths. Substituting both the hardness and Young’s modulus of a fused silica into the derived function, the reference loading curve was plotted and directly compared with experimental data of the fused silica measured by two commercial nanoindenters. All indentation loading curves showed leftward shifts compared to the reference loading curve, and this is discussed, offering two reasons for the result, system compliance and indenter apex geometry.(Received January 6, 2014)
FMS에서 그룹형성에 의한 그룹내 가공부품투입순서/그룹간 가공순서결정 모델
윤영수,서승록 大邱大學校 科學技術硏究所 1995 科學技術硏究 Vol.2 No.2
This study aims to develp an algorithm to connect group formation problem with part releasing sequence in groups and group precessing sequence among groups under the hierachical operation structure in flexible manufacturing systems(FMS). For group formation, rank order clustering(ROC) algorithm is used and this algorithm is programmed by using the macro functions of QUATTRO, one of the spreadsheet packages. The part releasing sequence in groups and group processing sequence among groups are solved by the heuristic approach and 0-1 integer programming using Hanuning distance. As a case study, the effectiveness of the proposed FMS operation procedure is shown through numerical examples.
위암 환자에서 위절제술후 나타나는 담도확장의 임상적 의의: 추적 CT 소견을 중심으로
윤구섭,백승연,이문규,김영환,오용호 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1
A retrospective review of consecutive 35 patients'pre and post operative abdominal computed tomography was performed to determine frequency and degree of bile duct dilatation following Billroth Ⅱ operation for stomach cancer and it's clinical significance. Degree of intrahepatic biliary dilatation was classified as mild, moderate, marked according to the extension into central, middle and peripheral zone of liver, respectively. Three specialists on the abdominal image participated in analysis of those findings without prior information of the patients. Intrahepatic biliary dilatation was seen in 22 patients(63%) analysed by at least one radiologist, in 13 patients(37%) by at least two radiologists. Bile duct dilatation on CT was common finding and not necessarily meant tumor recurrence. Vagotomy and afferent loop resulted form Billroth Ⅱ were one of possible causes of bile duct dilatation. This study showed in the cases of bile duct dilatation without clinical and other radiological evidence of recurrence, no further study are needed and only enough to follow up study.
정현형 조화하중을 받는 아치 구조물의 연속 응답 스펙트럼 분석에 의한 비선형 동적 불안정 특성에 관한 연구
윤태영,김승덕 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
In this study, we investigate the fundamental mechanisms of the dynamic instability when the sinusoidal shaped arch structures with pin-ends are subjected to the sinusoidal harmonic excitations. For this research, we derive equations of motion for shallow arch structures considering geometrical nonlinearity and get discrete nonlinear equations of motion by Galerkin's method. We can get the nonlinear displacement responses by Newmark - β method, and using this analyze the characteristics of dynamic instability through the running response spectrum by FFT9Fast Fourier Transform).
윤영웅,김상렬,최일곤,한승완 東亞大學校 1992 東亞論叢 Vol.29 No.1
비뉴튼류인 CMC수용액중의 기체체류량과 용량액상물질전달계수를 분산판 구멍의 면적비와 용액의 물성에 따라 실험하였다. ε??와 K??a의 값은 CMC의 농도가 증가할 수록 감소하나 구멍의 수가 3∼8개 범위에서는 분산판의 구멍 면적비에 거의 영향이 없었다. 실험에 의하여 column에 적용될 수 있는 ε??와 K??a에 대한 식을 제안 하였다. The effect of properties of CMC-solution and area ratio of distributor hole on gas holdup and volu-metric liquid-phase mass transfer coefficient in a bubble column have been experimentally studied. The values of ε?? and K??a were decreased with increasing concentration of CMC and were scarcely affected by the area ratio of distributor in the range of the 3∼8 hole number. Correlations for ε?? and K??a were formulated from the experimental result.
딸기 ‘설향’ 육묘 시 모주의 묘소질과 정식 시기가 런너와 자묘의 생육에 미치는 영향
김대영, 김수, 최학순, 이선이, 허윤찬, 정승룡 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2
This study was conducted to investigate the effect of plantlet quality and transplanting time of mother plants on the growth of runner and daughter plants of strawberry (Fragaria×ananassa) ‘Seolhyang’ during nursery. Plantlet quality of mother plants is expected to be able to distinguish on the basis of crown diameter because crown diameter was highly correlated with fresh weight(r = 0.85), leaf area(r = 0.81), root weight(r = 0.75) and 1st primary roots(r = 0.73). Mother plants were transplanted based on the crown diameter (7~9 mm, 9~11 mm, 11~13 mm and 13~15 mm) in 15 March, 2012. Also, mother plants were transplanted in 15 March, 30 March, 15 April, 30 April and 15 May to investigate the best transplanting date. As a result, the number of daughter plants in the treatment 9~11 mm and 11~13 mm were 22.7 and 22.4 respectively at the end of July. But the number of daughter plants in the treatment of 7~9 mm and 13~15 mm reduced 26% and 16% respectively compared to the average number of the daughter plants in the treatment between 9 mm and 13 mm. The number of daughter plants in the treatment of 15 March, 15 April and 15 May were 20.2, 18.8 and 13.2 respectively at the end of July. Early time of transplanting was able to obtain the more daughter plants and improve the plantlet quality of daughter plants. Therefore, mother plants having crown diameter between 9 mm and 13 mm recommended to be transplanted until the end of March to obtain sufficient daughter plants and improve plantlet quality of daughter plants for producing strawberry fruits.