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백승,소영석,노준,김철성,장대수 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1
Background and Objectives : Digital rectal examination (DRE) and uroflowmetry have been usually together in the BPH management. The aim of this study was to determine whether DRE would affect uroflowmetry measurement. Materials and methods : A total of 80 male patients were included in this study. First uroflowmetry was done after DRE, second uroflowmetry was done without DRE. Third uroflowmetry was done after DRE, and fourth was done without DRE. Results : The mean Qmax on uroflowmetry after DRE was 15.2±8.7㎖/sec and 14.9±9.8㎖/sec. The mean Qmax on only uroflowmetry was 15.3±8.9㎖/sec and 15.4±8.4㎖/sec. There was statistically no difference between the mean Qmax(P> 0.05). And effect of digital rectal examination on uroflowmetry measurement with age was statistically no difference between the mean Qmax(P)0.05). Conclusions : We could not find and effect of DRE on uroflowmetry parameters, In this study, uroflowmetry test would be appropiate for recommending DRE before or after.
이법이,백태경,정호삼,이규식,박준영 한양대학교 의과대학 1993 한양의대 학술지 Vol.13 No.1
It is well known that interstitial cell of Leydig is developed from the mesenchymal cell in the intestitial tissue of the testis during fetal period, but it gradually regressed until puberty when mature Leydig cell is derived from the mesenchyme of interstitial tissue of fetal Leydig cell. The function of the Leydig cell is synthesis and secretion of testosterone which influences on differentiation of male geritalia at fetal period, and revealation of male secondary sexual characteristies and differentiation of sperm at puberty. To investigate the differentiation of interstitial cell in interstitium and ultrastructural changes of interstitial cell in rat testis and ultrastructural changes of interstitial cell in rat testis and relation to testosterone secretion, the author has studied this experiment. Fetal rats on the 16th, 18th and 20th gestational days and rats on the 1st, 3rd, 7th day, 2nd, 3rd and 8th week after birth were used as experimental animals. Some of obtained testis were stained with hematoxylin and eosin for light microscopic study, and other specimens were double stained with uranyl acetate and lead citrate for electron microscopic study. The results were as follows: 1. On the 16th day of pregnancy, a few of round eosinophilic Leydig cells are firstly observed in the interstitium of testis in fetal rat. On the 18th and 20th day of pregnance, 1st and 3rd day of neonatal life, a number of Leydig cells forming cellular cord were observed. On the 1st and 2nd week after birth, number and size of Leydig cell are markedly reduced but on teh 3rd week after birth Leydig cells are reappeared. On the 8th week after birth distribution of Leydig cells is similar to that in adult rat testis. 2. On the 18th and 20th day pregnancy, and 1st and 3rd day of neonatal life, circular or oval shaped mitochondria matrix were observed in the Leydig cell. On the 1st and 2nd week after birth, giant mitochondria and mitochondria with disorganized mitochondrial crista were revealed. On the 3rd and 8th week after birth, appearances of mitochondria were similar to that in Leydig cell of the rat testis on the 20th day of pregnancy. 3. Numerous and round cisternae of smooth endoplasmic reticulum were observed in Leydig cell of rat testis on the 18th and 20th day of pregnancy. 1st and 3rd day of neonatal life, and 1st week after birth . Horseshoe-shaped deformity and reduction in number of cisternae of smooth endopalmic reticulum were revealed in Leydig cells on the 2nd week after birth. Numerous and round cisternae of smooth endoplasmic reticulum were seen on the 3rd and 8th week after birth. 4. A few lipid droplets were revealed in Leydig cell of rat testis on the 18th day of pregnancy, but many lipid droplets were observed in Leydig cells of rat testis on the 20th day of gestation, 1st and 3rd day of neonatal life, and 1st week after birth. Numbers of lipid droplets were gradually decreased after 2nd week of postnatal life. 5. Many autophagic vacuoles were observed in Leydig cells would be firstly differentiated from the mesenchymeal cells in interstitium of fetal rat testis on the 16th day of pregnancy, and proliferated from the 18th day of pregnancy to the 1st day of neonatal life, and then gradually regressed before the puberty, but at the begining of puberty adult type of Leydig cell be proliferated.
Young-Joon Baik,Kwan-Won Lim,Yong-Sub Sim,허주열,Jong-Keuk Park,Wook-Seong Lee 한국부식방식학회 2019 Corrosion Science and Technology Vol.18 No.5
Silicon carbide (SiC) thin films become superhard when they have microstructures of nanocolumnar crystallinegrains (NCCG) with an intergranular amorphous SiC matrix. We investigated the role of ion bombardmentand deposition temperature in forming the NCCG in SiC thin films. A direct-current (DC) unbalanced magnetronsputtering method was used with pure Ar as sputtering gas to deposit the SiC thin films at fixed targetpower of 200 W and chamber pressure of 0.4 Pa. The Ar ion bombardment of the deposited films wasconducted by applying a negative DC bias voltage 0-100 V to the substrate during deposition. The depositiontemperature was varied between room temperature and 450°C. Above a critical bias voltage of -80 V, theNCCG formed, whereas, below it, the SiC films were amorphous. Additionally, a minimum thermal energy(corresponding to a deposition temperature of 450°C in this study) was required for the NCCG formation. Transmission electron microscopy, Raman spectroscopy, and glancing angle X-ray diffraction analysis (GAXRD)were conducted to probe the samples’ structural characteristics. Of those methods, Raman spectroscopywas a particularly efficient non-destructive tool to analyze the formation of the SiC NCCG in the film,whereas GAXRD was insufficiently sensitive.
백영곤(Young Gon Baik),유희준(Hee Joon Yu),손숙자(Sook Ja Son),유형준(Hyoung Joon Yoo),전인기(Inn Ki Chun) 대한피부과학회 1994 大韓皮膚科學會誌 Vol.32 No.1
Background : It has been weil known that patients with diabetes mellious are prone to cutaneous infections, but whether superficial mycoses are truely more prevalent in diabetic patients is still controversial. Objective : The purpose of this study was to