디지털 음악 및 아날로그 음악이 악력에 미치는 영향 평가

최민지 ( Min Ji Choi ),홍지혜 ( Ji Hye Hong ),송영웅 ( Young Woong Song ) 대구가톨릭대학교 자연과학연구소 2011 자연과학연구논문집 Vol.9 No.1

This study evaluated the effect of the music type (analog and digital) on the grip strength. Five male and five female healthy college students participated in the experiment. The independent variables were music type (analog, digital, no music) and listening time (5 min., 10 min., and 15 min.). The classic LP disc was used as the analog music and the LP was converted to mp3 to make the digital music source. Grip forces were measured every 5 minutes until 15 minutes using Jamar strain guqge. Mean forces and peak forces were used as dependent variables. The analysis of variance showed that there was no difference between analog and digital music (p>0.05). Only, the gender effect was statistically significant (p<0.05). These results should be verified using different types of music (not only classical music) or preferred music, during different listening time duration (>15 minutes).

인체혈장 중 에탐부톨의 HPLC 분석법의 검증 및 단일용량 투여에 의한 약물동태 연구

곽혜선,박경호,최준식,송진아,성민경,장정옥,이화정 한국약제학회 2005 Journal of Pharmaceutical Investigation Vol.35 No.2

An HPLC method was employed for the determination of ethambutol in human plasma. After addition of internal standard (IS, octylamine, 2 μg/mL) and alkalinization of the plasma with 5 M sodium hydroxide, the drug and IS were extracted into the mixture of chloroform and diethyl ether (40:60, v/v). Following a 15-min vortex-mixing and a 10-min centrifugation, the organic phase was spiked with 100 pL of phenylethylisocyanate (2000 μg/mL) for chemical derivatization, mixed for 5 min and evaporated to dryness under a stream of nitrogen. The residue was reconstituted with 100 μL of mobile phase and 20 pL was injected into Cl8 column with a mobile phase consisting of methanol:water (70:30, v/v). The samples were detected utilizing an ultraviolet detector at 200 nm. The method was specific and validated with a limit of 0.15 μg/mL. Infra- and inter-day precision and accuracy were acceptable for all quality control samples including the lower limit of quantification. The applicability of this method was demonstrated by analysis of human plasma after oral administration of a single 1200-mg dose to 20 healthy subjects. From the plasma ethambutol concentration vs. time curves, the mean AUC was 9.61 ± 1.64 μg hr/mL. and Cmax of 2.68 μg/mL reached 2.73 hr after administration. The mean biological half-life of ethambutol was 3.46 ± 1.21 hr. Based on the results, this simple and validated assay could readily be used in any pharmacokinetic studies using humans.

피칸(Carya illinoensis C. KocH)으로부터 지질대사물질의 분리 및 동정

송명종,한민우,양혜정,이대영,노영덕,백남인 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1

피칸(Carya illinoensis C. Koch) 열매를 80% MeOH로 추출하고, 추출물을 극성에 따라 n-hexane, CHCl_(3), EtOAc, n-BuOH 및 물로 분배, 추출하였다. 이 중 EtOAc분획으로부터 silica gel column chromatography를 반복하여 4종의 지질화합물을 분리하였다. 분리된 화합물 화학구조는, NMR 및 MS 등의 스펙트럼을 해석하여 oleic acid methyl ester, linoleic acid methyl ester, β-sitosterol, daucosterol(3-O-β-D-glucopyaranosyl β-sitosterol)으로 동정하였다. Carya illinoensis C. Koch was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with n-hexane, CHCl_(3), EtOAc, n-BuOH and H_(2)O, successively. From the EtOAc fraction, four compounds were isolated through the repeated silica gel column chromatographies. From the results of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as oleic aicd methyl ester(1), linoleic aicd methyl ester(2), β-sitosterol(3), and daucosterol(4). They were the first to be isolated from C. illinoensis.

태아 피부의 cytokeratin 1, 10, 14 발현

송계용,이선,서동혜,김미경,민혜정,지제근 대한병리학회 2001 Journal of Pathology and Translational Medicine Vol.35 No.3

발기부전 검사에서 천연색 복합초음파촬영술과 야간음경발기검사의 일치도

송윤섭,구자현,김민의,이혜경,김두상,박영호,이남규 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1

We intended to know that the result of color duplex ultrasonography corresponded to that nocturnal penile tumescence rigidity in the diagnosis of erctile dysfunction. We performed both color duplex ultrasonography and nocturnal penile tumescence rigidity in 15 erectile dysfunction men. Colr duplex ultrasonography was done with a 7 MHz. color Doppler unit after intracorporeal pharmacological injection and measured maximal arterail diameter, peak systolic velocity, end-diastolic velocity and the results were compared with rigidity and tumescence in nocturnal penile tumescence rigidity using RigiScan. The positive predictive value, negative predictive value, sensitivity, specificity, overall accuracy of color duplex ultrasonography was reasonable when the result of color duplex ultrasonography was compared with the that of nocturnal penile tumescence rigidity. According to this results, color duplex ultrasonography could not only predict but also correspond to nocturnal penile tumescence. Therefore, we suggest that color duplex ultrasonography can relpace nocturnal penile tumescence rigidity if psychogenic and neurogenic erectile dysfunction are distinguished by history and neurologic examination.

호산구성 간농양 54예의 임상상

강혜련,권혁수,송우정,이상민,김태범,박혜경,장윤석,김윤근,조상헌,민경업,김유영 대한알레르기학회 2004 천식 및 알레르기 Vol.24 No.2

휴대폰 카메라용 자동초점 구동기의 충격해석

이성민,김봉석,송준호,이수훈,이혜진,이문구,송준엽,이창우 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

Recently, the robustness against daily impact is important according to portablization and downsizing of mobile electronics. Especially, almost parts of cellular phone should undergo drop test when they fall 1.5 m above ground. This test simulates the case when cellular phone slips through user's fingers while he is talking on the phone. This paper studies a drop test of auto focusing (AF) actuator for camera module in cellular phone. This component is composed of voice coil motor (VCM) as an actuator and leaf spring as a guide and suspension. The leaf spring's deformation is essential for the test because its permanent distortion disables the focusing, and then, a high quality photograph cannot be obtained. Up to now the drop test has been carried out after fabricating real AF actuator. We propose a dropt test model which simulates the drop test based on finite element analysis. This model makes us enable investigate the stress acting on the clamping and curved parts of leaf spring. Stress over Von Mises criterion lets the spring deformed permanently, and then AF actuator malfunctioned, It helps us to design and modify AF actuator without manufacturing the real product. And also, it saves the time and cost for the development of new products.

다공성 하천구조물을 이용한 2차 처리수의 수질개선 효과

이혜미,오종민,최이송 경희대학교 환경연구소 2002 環境硏究 論文集 Vol.11 No.-

This study was performed to application of porous hydraulic structures(porous weir and porous river bed materials) to water purification in small and middle stream. This study was investigated the ability of water purification according to the variety of environmental conditions, periphytons and material of hydraulic structures. When the ordinary hydraulic structure was used as contact d a , the average removal efficiency of SS, BOD and COD were SS(48.4%), BOD(25.2%), COD(12.0%) respectively. Also when the porous hydraulic structure was used as contact media, the average removal efficiency of SS, BOD, COD and T-P were SS(83.0%), BOD(62.1%), COD(45.9%), T-P(32.3%) respectively. Judging from our results, porous concrete applied to the weir from took a great role of removal efficiencies of BOD, COD(low concentration range of organic materials) and T-P

대학생들의 자기이미지가 의복 혁신성과 동조성에 미치는 영향

서민정;김연희;윤송이;서문숙;이규혜 한양대학교 2008 韓國 生活 科學 硏究 Vol.28 No.1

The purpose of this study was to examine self images as antecedents of clothing innovativeness and conformity. A survey questionnaire was made for the empirical research. 206 university students living in Seoul metropolitan area participated in the study. The data were analyzed using factor analysis, Chi-square, t-test, ANOVA, and stepwise regression. The self image measures were classified six factors (free, affirmative, self-centered, traditional, sensual, and feminine image). According to regression analysis, fashion innovativeness was affected by free, traditional, sensual image, and conformity was only influenced by traditional image. Respondents were classified into four groups by innovativeness and conformity scores; Low innovativeness/Low conformity group(LI/LC), Low innovativeness/High conformity group(LI/HC), High innovativeness/Low conformity group(HI/LC), and High innovativeness/High conformity group(HI/HC). For LI/LC consumers, innovativeness was affacted by the sensual self image. For LI/HC consumers, and innovativenss was affected by the feminine self image. The conformity of HI/LC were influenced by traditional self image.

근육세뇨관 수분 및 이온 이동에 대한 모델

양훈모,송혜섭,민영기 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.2

본 연구는 세뇨관 벽을 통하여 물과 이온이 이동하는 현상을 수학적 모델에 근거하여 수행하였다. 세포측막, tight junction, 기저막으로 구성된 측간질 공간으로의 염분이동은 삼투현상에의해 동시에 수분이동을 유발한다. 이로인한 수분에 공간내 증가는 정수합을 증가시켜 Na, Cl, HCO3 에 대한 반사계수가 0 이고 투과성이 매우 높은 기저막을 통해 용액이 유출된다. 동반이동 가능성과 비평형 열역학 이론을 포함한 본 모델을 이용하여 tight junction의 이온투과성과 반사계수가 물과 이온 이동에 미치는 영향을 조사해 본 결과는 다음과 같다. 1. 수분의 전도성(Lp)은 100배 이상하여야 삼투압에 의한 수분이동이 전체 수분이동에 영향을 미칠 수 있다. 2. 관강 측과 기저측 세포막은 반사계수가 1이기 때문에 세포를 관통하는 convective ion flux에는 영향이 없었다. 3. 관강내 액과 측공간 액사이에는 높은 HCO3 농도 경사가 유지되고 있기 때문에 HCO3에 대한 높은 반사계수는 삼투적 수분 흡수에 필수적이다. 4. Cl의 반사계수의 감소는 수분흡수를 증가시켜 Cl 재흡수도 증가시켰다. 동시에 전기적 확산에 의해 Na 재흡수도 증가하였다. 5. 전반적인 반사계수의 감소는 수분 재흡수는 감소 시켰으나 용질 재흡수는 증가시켰다.