두개안면 섬유성 이형성증의 임상적 고찰

백롱민,오갑성,윤성호,백세민,황민호 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.3

Fibrous dysplasia is a benign pathologic condition of bone and causes facial deformities as well as functional problems. We have managed 32 craniofacial fibrous dysplasia form March 1989 to December 1993. The most common age distribution of surgery was second decade(34%) and third decade(53%). In our patients, the desease process usually begins in childhood and progresses throughout puberty and adolescence. Treatment was aimed at preventing and correcting functional problems and achieving normal facial aesthetics. The reconstruction with other combined surgery, i.e., mandibular and maxillary osteotomies, reduction malar plasty, malar augmentation and orbit, nasal reconstruction with bone graft. Postoperative results were satisfactory in most cases. In some patients, repeated contouring(16%) surgery might produce less morbidity than a single massive resection. In evaluating the extent of the lesion, computerized tomography prooved to be a good diagnostic tool. Aethetically and functionally satisfactory surgical results were achieved by bone shaving in combination with reconstructive surgery.

원인 불명의 실신 환자의 진단에 있어서 Head - up tilt Test 의 유용성과 혈관미주신경성 실신 환자의 임상적 특징

윤호중(Ho Joong Youn),정욱성(Wook Sung Chung),백상홍(Sang Hong Baek),김철민(Chul Min Kim),박인수(In Soo Park),김재형(Jae Hyung Kim),최규보(Kyu Bo Choi),홍순조(Soon Jo Hong) 대한내과학회 1994 대한내과학회지 Vol.47 No.2

N/A Background: Syncope, defined as a transient loss of consciousness, is a frequently encountered symptom, but despite thorough clinical and invasive diagnostic investigation, the cause of syncope remains unexplained. In recent years, head-up tilt test has been of increasing interest as a diagnostic aids in patients with unexplained syncope. We studied to define the usefulness of various diagnostic test in the evaluation of patients with recurrent syncope, to assess the usefulness of head-up tilt test in the working of syncope of unknown origin and to evaluate the clinical characteristics of subgroups of patients with syncope induced by head-up tilt test. Methods: Between June, 1991 and November, 1992 at St. Mary`s hospital, 21 patients with history of syncope and 24 control subjects without history of syncope underwent 60° head-up tild test for 60 min. Results: 1) The definite cause for recurrent syncope were diagnosed in 10 of patients (47,6%) after clinical and invasive tests. 2) During head-up tilt test, vasovagal responses were provoked in 5 of 21 patients (23.8%) with recurrent syncope and 1 of 24 patients (4.2%) without syncope (p<0,05). 3) The head-up tilt test induced symptomatic bradycardia or hypotension in 3 of 10 patients (30%.) with negative electrophysiologic results. 4) During tilt induced vasovagal response, a) mean heart rate decreased to 42±24 beat/min from supine control of 70±12 beat/min (p<0. 05), b) mean systolic blood pressure decreased to 95±12 mmHg from supine control of 120±S mmHg (p<0,05), c) mean diastolic blood pressure decreased to 60±21mmHg from supine control of 72±13 mmHg (p<0.05), d) the time interval to onset of vasovagal response was 22±12 min. Conclusions: 1) In a large proportion of patients with recurrent syncope, the diagnosis remains unexplained despite a neurologic and cardiologic investigation including an electrophysiologic study. 2) Vasovagal responses are frequent cause in patients with recurrent unexplained syncope. 3) The head-up tilt test may be a simple, safe and highly yielding provocative test in the investigation of syncope of unknown origin.

Streptococcus salivarius의 요소분해효소 활성에 관한 연구

정상백,최호영,민병순,박상진,이진용,최기운 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.1

Dental caries is induced by organic acids produced by oral bacteria. In order to prevent dental caries, therefore, it is essential to maintain neutral pH in the oral cavity. Urea plays a major role in oral pH homeostasis. Urea is hydrolyzed by bacterial ureases to ammonia, causing a pH elevation, Streptococcus salivarius has been shown to be a major contribution to oral ureolysis. Synthesis of urease by S. salivarius appears to be constituitive, but can be greatly enhanced by low pH. It is, therefore, conceivable that ureolytic activity of S. salivarius from a carious lesion is greater than that of the bacterium from a healthy tooth. In the present study, urease activity of S. salivarius isolates from dental plaque of carious lesions was compared with that of the isolates from plaques of the teeth and the dorsum of the tongue; 45 S. salivarius strains were isolated from carious lesions(>C2) of 21 individuals with dental caries and 30 strains from 10 individuals without dental caries. The results were as follows: 1. All the 21 individuals with dental caries harbored ureolytic S. salivarius whereas 3 of 13 individuals without dental caries harbored non-ureolytic strains of S. salivarius. 2. All the 45 S. salivarius isolates from carious lesions showed urease activity. In contrast, of 30 isolates from individuals without dental caries, 17 isolates(56.7%) did not demonstrate urease activity, or if any, very little(<5μmol/min/mg). 3. Urease activity of the isolates from carious lesions was greater than that of the isolates from individuals without dental caries:the urease activity ranged from 42 to 381μmol/min/mg and from 0 to 208μmol/min/mg, respectively. 4. At acid pH(5.5), the isolates which showed intermediate urease activity at pH 7.0 demonstrated even higher activity whereas the isolate with no or lower urease activity did not show any significant difference in their activity. However, the isolates with the greatest urease activity from both individuals with and without dental caries, exhibited a rather much lower urease activity at pH 5.5. The overall results suggest that isolates may have their own urease activity but the isolates exposed to chronic acidic environment of the carious lesion might elevate urease activity of S. salivarius, which in turn, might influence on survival of S. salivarius itself and other bacteria establishing a new oral bacterial ecosystem.

알코올이 Dynamic Posturography에 미치는 영향

이진춘,고의경,장민호,이병주,백무진,노환중,왕수건,전경명 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.2

한국프로야구선수의 영양 컨디셔닝에 관한 조사연구

백영호,김민호 釜山大學校 附設 體育科學硏究所 1997 體育科學硏究所 論文集 Vol.13 No.-

This study was conducted by survey using 192 athletes of 8 teams in the first level of Korean professional baseball athletes regarding the nutrition and the eating habits with conditioning. This study was summarized as follows; There was significant difference between athletes' responses that 82.00% of athletes mentioned that they have breakfast, but 17.99% of athletes mentioned that they do not have breakfast. Before the game, regarding an amount of meal, the pitchers(41.18%), the catchers(42.86%), and the outfielder(47.37%) preferred "a little less amount of meal", but the infielder preferred "just about of meal" were appeared in day time of competition. As well as the night time of games, athletes preferred "just about an amount of meal"(44.92%), "a little less amount of meal"(33.69%), and "just as much as I feel full"(18.18%) as order. The athletes most preferred to have the light food(69.79%), such as kimbob, woodong, and neongmyon(iced noobles), the general Korean food(16.67%) such as the daenjang(soybean paste), daenjang soup, and chung kook jang(fermented soybeans), and the fastfood(10.42%) such as hamburger, sandwich before games. The most of athletes(68.75%) tend to do not have food after game 20 to 30 minutes. The pitchers(69.12%), the infielders(75.86%), and the outfielders(65.79%) tend to have three meals a day but the catchers(57.14%) tend to have less three meals a day. To keep condition, the pitchers(25.37%) and the outfielders(31.58%) tend to have special medications, but the catchers and the infielders tend to do not have it. The most of Korean professional baseball players were used with the nutritional conditioning. However, a few players required to have a little more knowledge of nutrition to keep their health. Unmarriage players more tend to have breakfast than marriage players so they required reeducation about nutrition to keep their health after marriage. To improve professional baseball players' peak conditioning, the nutritional management education, the menu, and the conditioning programs are required to develop.

홍천강 상류에 서식하는 묵납자루, Acheilognathus signifer의 성 성숙과 산란시기

백현민,송호복,권오길 한국어류학회 2003 韓國魚類學會誌 Vol.15 No.4

묵납자루, Acheilognathus signifer의 성적성숙과 산란시기를 연구하기 위하여 2002년 3월부터 동년 10월까지 북한강 수계의 홍천강 상류인 내촌천에서 조사, 연구하였다. 생식소성숙도지수(GSI)는 4월에 암컷(GSK = 6.95±0.83)과 수컷(GSI = 2.84±0.55) 모두 최대치로 나타났고, 암컷은 8월(GSI = 2.02±0.91), 수컷은 9월에(GSI = 0.54±0.50)최저치를 보였으며, 10월부터 GSI가 상승하였다. 산란관길이 지수(OI)는 5월에 최대로 신장(26.53±8.34%)되었으며, 8월에 가장 축소(5.77±1.37%)되었다. 암컷은 체장 45㎜ 이상, 수컷은 체장 40㎜이상부터 생식 활동이 가능 할 것으로 추정되었다. 암컷과 수컷에서 산란에 참여 비율이 높은 연령군은 2년생이었으며, 수컷은 암컷보다 3년생의 참여 비율이 높았다. 생식 주기는 3~4월의 성숙기 5~6월의 완숙 및 산란기, 7~8월의 퇴화 및 휴지기, 9~10월의 성장기로 구분되었다. 포란수는 141~314(평균 225)개였으며, 성비에서 암컷이 수컷보다 우세하게 나타나 암수의 성비가 1:1이 아니었고, 암수의 성비는 유의한 차이를 보였다(c^(2) = 13.5, P<0.05). 본 종의 산란 성기는 GSI가 높은 값을 나타내고, 산란관이 최대로 신장되며, 난소와 정소가 최대로 성숙하는 5월로 추정되었다. The Korean bitterling, Acheilognathus signifer, collected in the Naechoncheon, Hongchungun, Kangwon-do, Korea, from March to October 2002, were examined for sexual maturation and spawning season. Gonadosomatic index (GSI) and ovipositor indices (OI) values reached the maximum in May. The body length at sexual maturity was estimated at 45 ㎜ for the females and 40 ㎜ for the males. Reproductive cycle can be classified into the growing stage (September to October), mature stage (March to April), ripe and spent stage (May to June), and degenerative and resting stage (July to August), Two-year-old populations were the highest participants in spawning. Fecundity of A. signifer ranged from about 141-314 (average 225) eggs. The sex ratio of fema1e : male was not significantly different from 1 : 1 (χ² = 13.5, P< 0.05).

석·골재용 암석의 풍화에 따른 특성 변화

민경원,서백수,진호일,임길재 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

화강암의 조직을 고려하여 4개지역에서 6개 석ㆍ골재 석산을 대상으로 신선한 화강암과 풍화된 화강암을 Ⅰ ~ Ⅵ단계까지 체계적으로 채취된 화강암을 대상으로 풍화에 따른 화강암의 물리적ㆍ화학적 특성 변화에 대한 고찰(민경원 등, 1998)에 추가하여, 풍화에 의한 slake 내구성과 색도의 변화를 측정하고 토의하였다. slake 내구성 시험에서는 일반적으로 Ⅰ~Ⅲ 단계의 화강암이 시험 주기가 증가할수록 선형적이 질량감소를 보이고 Ⅳ~Ⅵ 단계에서는 곡선 모양의 감소 경향을 보여주면 세립질의 화강암이 상대적으로 높은 내구성을 가진다. 풍화에 따라 암석의 백색도는 감소하고 황색도는 증가하며, 표준화된 백색도-황생도 지수는 풍화단게를 지시해 줄 수 있는 유용한 지시자로 제안되었다. Fresh and weathered granitic rocks of grades Ⅰ to Ⅵ were sampled systematically from six stone and aggregate quarries in four chosen areas in consideration of their textures. In addition to the observed variations. of physical and chemical properties of granitic rocks in terms of weathering grades(Min et al., 1998), slake durability and color index variations were measured and discussed in this article. In the slake durability test, generally with increasing test cycles the granitic rocks of grades Ⅰ to Ⅲ show linear losses of weight but those of Grades Ⅳ to Ⅴ show curvilinear trends, and the fine-grained weathered granitic rocks have comparatively higher durability. As weathering proceeds, whiteness of rocks decreases and yellowness increases. A normalized whiteness-yellowness index is suggested as a weathering index to be one of useful indicators of weathering grades.

연준모치,Phoxinus phoxinus 와 금강모치, Rhynchocypris kumgangensis의 서식지 분리와 먹이 선택

백현민,송호복,심하식,김영건,권오길 江原大學校 附設 環境硏究所 2002 環境硏究 Vol.19 No.-

The authors investigated habitat segregation and prey selectivity of two cohabitants, Phoxinus phoxinus and Rhynchocypris kumgangensis, in Dongdaesheon, Jeongsoen-gun, Kangwon-do, Korea, from April to October 2001. P. phoxinus dominated the upper reaches of the stream, whereas R. kumgangensis dominated the middle and lower reaches of the upprer stream. P.phoxinus inhabited zones of relatively slow water velocity in the bottoom layer, but R. kumgangensis lived zones of relatively high water velocity in the middle and upper layers of the cohabitat. P. phoxinus ingested mainly Ephemeroptera, Trichophtera, Diptera in spring, and Diptera in summer and autumn. R. kumgangensis fed mainly on terrestrial insects in spring and summer, and Diptera in autumn.

상악 및 하악의 전방 분절 절골술을 이용한 안면 프로파일 성형술의 임상적 고찰

백세민,오갑성,윤은성,백롱민,임재호 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.5

Mid and lower facial convexity is more common in Oriental people than in Caucasian and it is thought to be caused by a more anterior position of dental and skeletal structures rather than soft tissue structures, a more procumbent dentition, and a more acute interincisial angle. To improve their lower facial profile, we performed maxillary and mandibular anterior segmental osteotomies in 96 patients, by way of using palatal mucoperiosteal flap for vascular circulation of the antrior segment and plates and screws for rigid fixation. We also used wafer splint which had been made through model surgery which dental cast and tracing of cephaloghram had been needed. We could get the accurate diagnosis and know how much and which direction the anterior segment should move to get the satisfactory result or improved lower facial profile and corrected occlusal relationship with the teeth. No major complications occurred throughout the followup period except three of over0recessed lip and two of septal deviation, otherwise most of the patients were satisfied with the result.

연준모치, Phoxinus phoxinus와 금강모치, Rhynchocypris kumgangensis의 서식지 분리와 먹이 선택

백현민,송호복,심하식,김영건,권오길 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.2

강원도 정선군의 동대천에 동서하고 있는 Phoxinus phoxinus와 Rhynchocypris kumgangensis의 서식지 분리와 먹이 선택에 대하여 2001년 4월부터 9월까지 계절별로 조사, 연구하였다. 두 종은 전형적인 Aa형 하천에 서식하고 있었으며, 상류쪽에서는 P. phoxinus가, 중·하류쪽에서는 R. kumgangensis가 우세하였고, 수온이 중요한 서식 제한 요인으로 나타났다. 동일 서식지에서 P. phoxinus는 유속이 느린 곳에, R. kumgangensis는 상대적으로 유속이 빠른 곳에서 점유율이 높게 나타났으며, P. phoxinus는 하천의 하층에, R. kumgangensis는 상층 및 중층에 주로 서식하였다. 먹이 생물은 P. phoxinus는 봄에 Ephemeroptera, Trichoptera, Diptera를 주로 섭식하였고 여름과 가을에는 Diptera를 섭식하였으며, R. kumgangensis는 봄과 여름에는 육상곤충, 가을에는 Diptera를 주로 섭식하였다. The authors investgated habitat segregation and prey selectivity of two cohabitants, Phoxinus phoxinus and Rhynchocypris kumgangensis, in Dongdeacheom, Jeongsoen-gun, Kangwon-do, Korea, from April to October 2001. P. phoxinus dominated the upper reaches of the stream, whereas R. kumgangensis dominated the middle and lower reaches of the upprer stream. P. phoxinus inhabited zones of relatively slow water velocity in the bottom layer, but R. kumgangensis lived zoned of relatively high water velocity in the middle and upper layers of the cohabitat. P. phoxinus ingested mainly Ephemeroptera, Trichoptera, Diptera in spring, and Diptera in summer and autumn. R. kumgangensis fed mainly on terrestrial insects in spring and summer, and Diptera in autumn.