난소 미분화 기형종 1 례

최욱(W CHOI),최동수(DS Choi),목정은(JE Mok) 대한산부인과학회 1986 Obstetrics & Gynecology Science Vol.29 No.6

저자들은 본 대학 부속병원에서 난소 미분화(악성)기형종 1례를 경험하고 외래 추적관찰중에 있기에 문헌고찰과 함께 보고하는 바이다. Immature teratoma of the ovary is an uncommon and highly lethal ovarian germ cell tumor. This tumor represents approximately 1% of ovarian teratomas and occurs primaily in young adults. Immature teratomas may be composed of elements from all three germ layers the ectoderm, mesoderm and endoderm. These tumors are characterized by the presence of variable amounts of incompletely differentiated tissue. Treatment consists of complete excision of tumor at early stage, followed by adjunctive combination chemotherapy. The two most important prognostic parameters are known as stage of disease and histologic grade. The purpose of this paper is to report our experience with a patient with immature teratoma of the ovary in our hospital, with a brief literature review.

정적연소기에서의 고압디젤 분무 가시화

최욱(W. Choi),홍창호(C.H. Hong),김의희(E.H. Kim),김철(C. Kim),이종태(J.T. Lee),최병철(B.C. Choi) 한국자동차공학회 2001 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-

We carried out the experiments on the basic characteristics of high-pressure diesel spray. The experimental rigs were made by using the common rail injection system (1300 bar). Among many key factors critical in determining the characteristics of diesel spray, the ambient pressure, ambient temperature were selected as our test parameters. The test conditions chosen were accounted for the typical density range of a light-duty diesel engine(ρ=10~25㎏/㎥). These conditions were modulated by the combinations of ambient pressures (1~50 bar) and the ambient temperatures (300~673 K). As the ambient densities were increased, spray tip penetration decreased but spray angle increased. However, as the ambient densities were increased, even under increased ambient temperature, there was seen a condition that spray tip angle slightly decreased.<br/> <br/>

[가솔린엔진부문] BULK COMBUSTION을 위한 메탄올 및 가솔린 혼합연료의 분무특성에 관한 연구

최욱(W. Choi),임진강(J.K. Lim),최병철(B.C. Choi),임명택(M.T. Lim),김영길(Y.K.Kim),H. Fujimoto 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The main object of tins work is to investigate the spray behavior and spray charateristics of methanol and MX5 for tile bulk combustion. For this purpose, the effects of the ambient temperature and the injection pressure have been studied with the PIV system and CVCC for visualization. In tins experiment, the spray visualization of methanol and M85 was performed under various conditions such as ambient temperature, injection pressure.<br/> As a result, it is noticed that the increase of ambient temperature and injection pressure influenced tile formation of mixture. For the formation of homogeneous mixture, the improvement of fuel vaporization and tile formation of uniform temperature field were required.<br/>

활성탄 제조를 위한 자동차 페타이어의 연소특성에 관한 연구

최병철(B.C.Choi),최욱(W.Choi) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1

Tire shredding was considered as a single compound to determine its theoretical air/fuel ratio and heated in quartz reactor through electric furnace under various conditions (temperature up to 950°C, heating rates at 20, 50, 80 °C/min, λ=0.4 ~1.0). As temperature was increased the percentage mass of solid char decreased until approximately 600℃ after which was nearly constant. The effect of heating rate and air/fuel ratio on mass reduction of solid char was small relative to temperature but on CO emmision was significant. The trend of pore size distribution shifted to smaller pore radius region as temperature was increased and surface area increased with increase of reaction temperature.<br/>

배란유도주기에 따른 초음파검사와 기초체온표의 비교분석

최욱,서병희,이재현,Choi, W.,Suh, B.H.,Lee, J.H. 대한생식의학회 1985 Clinical and Experimental Reproductive Medicine Vol.12 No.2

Four points on the basal body temperature (B.B.T.) curve was correlated with the estimated time of ovulation, as determined by serial ultrasound in 50 induced menstrual cycles from 22 subjects. The time of ovulation was estimated by measuring the maximal diameter of follicles and observing the morphologic changes within the ovary from follicle to corpus luteum. The results were as following; 1. The diameter of the follicle measured at the day before disappearance was 21.1 mm on an average (S.D.: 2.14). The average follicular growth for 4 days before ovulation was measured at a rate of 2.8 mm/day, and rapid growth of follicle was observed 3.1 mm/day at the day before. 2. The changes associated with rupture of the follicles were the followings, in order of frequency; decrease in size(94%), disappearance of follicles(64%), fluid in the Cul-de-Sac(26%) and increased internal echoes(16%). 3. Only 20 of 50 cycles, exhibited a BBT dip and correlated with the estimated time of ovulation by ultrasound in 2 of which cases(10%). BBT nadir, 30 of 50 cycles, correlated in 5(16.7%). The first day of hyperthermic plateau(FDHP) and BBT coverline was exhibited in all cycles, correlated in 41(82%) and 35(70%) cases. 4. The relationship between the diameter of dominant dominant follicle, measured by ultrasound, and the basal body temperature curve were as following. During cycles in which dip was observed on the BBT curve, the follicular diameter were 10.5${\pm}$2.12 mm on 4 days prior to the point (D-4), and 12.5${\pm}$2.12 mm (D-3), 15.5${\pm$2.12 mm (D-2), 17.0${\pm}$1.41 mm (D-1) and 21.5${\pm}$2.12 mm just prior to the dip (D-0). In the nadir; 9.6${\pm}$1.67 mm (N-4), 12.8${\pm}$1.79 mm (N-3), 16.2${\pm}$1.92 mm (N-2), 18.2${\pm}$2.17 mm (N-1) and 21.4${\pm}$2.61 mm (N-0). In the First day of Hyperthemic Plateau (FDHP); 9.8${\pm}$1.36 mm (F-4), 12.4${\pm}$1.41 mm (F-3),15.1${\pm}$1.57 mm (F-2), 18.1${\pm}$1.67 mm (F-1) and 21.2${\pm}$2.25 mm (F-0). In the BBT coverline endopint; 9.9${\pm}$.39 mm (C-4), 12.5 ${\pm}$1.44 mm (C-3), 15.2${\pm}$1.64 mm (C-2), 18.0 ${\pm}$1.69 mm (C-1), and 21.2${\pm}$2.31 mm (C-0). 5. The relationship between the ultrasonographic signs of ovulation and the basal body temperature curve were as following. The BBT dip correlated with the ovulation in 2 cases, which revealed decrease in follicular diameter (100%), fluid pattem in the Cul-de-Sac (1 case, 50%) and complete disappearance of follicle (1 case, 50%). In the nadir (5 cases); the ultrasonographic signs of ovulation were decrease in follicular diameter (5 cases, 100%), fluid pattern in the Cul-de-Sac (1 case, 20%) and complete disappearance of follicle (3 cases, 60%). In the First day of Hyperthermic Plateau (41 cases); decrease in follicular diameter (40 cases, 97.6%), fluid pattern in the Cul-de-Sac (11 cases, 26.8%), appearance of internal echo and thickening of the wall (6 cases, 14.6%) and com plete disappearance of follicle (28 cases, 68.3%). In the BBT coverline endpoint (35 cases); decrease in follicular diameter (33 cases, 94.3%), fluid pattern in the Cul-de Sac (9 cases, 25.7%), appearance of internal echo and thickening of the wall (5 cases 14.3%) and complete disappearance of follicle (20 cases, 57.1%).

정상임신에 있어서 Real-time 초음파 분석에 의한 태반성숙등급과 임신재태주수 및 태아아두대횡경치와의 관계에 관한 연구 ( 제 l보 )

서병희(BH Suh),최욱(W CHOI),이재현(JH Lee) 대한산부인과학회 1983 Obstetrics & Gynecology Science Vol.26 No.9

Biparietal Diameter in Normal Pregnancy At approximately the tenth to twelfth week of gestation, structures of the placenta can be clearly identified. Prior to that time,. the placenta appears as a conglomeration of high level echoes. Recent advances in ultrasound techlonology allow not only for localization of the placenta in utero but also for observation of internal texture and structure of the placenta. Also ultrasonography provides a noninvasive technique for the evaluation of fetal gestational maturity. In 1979, Granuum and associates described a method for classifying and grading placental maturity pased on ultrasound evaluations of placental textural changes in the in vivo placenta. During the period of six months from Jan. to June l983, the authors demonstrated correlation between maturational changes in the placenta and the biparietal diameter as seen by ultrasound and gestational weeks in 67 cases of pregnant women (over pregnancy 31weeks) at the obstetric ward of the Kyung Hee University Hospital. 1. The mean gestational age for Grade I Placentas was 35.6 weeks (range, 31 to 41 weeks). The mean gestational age for Grade Ⅱ placentas was 39.9 % weeks (range, 34 to 42 weeks). The mean gestational age for Grade Ⅲ placentas was 40.3 % weeks (range, 37 to 44 weeks). 2. 13(81%) of the 16 cases (gestational age<37 weeks) were in Grade Ⅰplacentas. At the forty-second week of pregnancy. 58 percent of patients will have Grade Ⅱ placentas, and 42 percent will have Grade Ⅲ placentas. Presence of a Grade Ⅰ placenta after the 42 weeks of pregnancy seriously challenges the patients date. 3. In the group of Grade Ⅰplacenta, the mean biparietal diamter was 8.3cm (range, 7.4 to 10cm). In the group of Grade Ⅱplacenta, the mean biparietal diameter was 9.0cm (range, 8.4 to 9.9cm). In the group of Grade Ⅲ placenta, the mean biparietal diameter was 9.0cm (range, 7.7 to 9.9cm)

태성 연골세포 발육부전증 1례

최욱,이서경,서병희,이재현 慶熙大學校 醫科大學 1984 慶熙 醫大 論文集 Vol.9 No.1