만성중이염의 골도청력변화

박선홍,노용훈,이도용,나한조,김용기,최봉남,도남용 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1

We have usually experienced bone conduction impairment in chronic otitis media, but it is unclear that raised bone conduction threshold is due to the reflection of cochlear dam- age and / or Carhart effect ( an artificial elevation of bone conduction threshold due to conductive defect ) or both. The purpose of this study is to verify the influence of the artificial elevation of the bone conduction threshold in chronic otitis media and to estimate Carhart effect. A total of 336 cases of tympanoplasty with unilateral chronic otitis media without any other causes of sensorineural hearing loss was studied. The average threshold levels of the bone conduction in diseased ears ranged from 18.5dB at 4kHz to 12.1dB at 250Hz The longer duration of the disease, the larger perforation size, the more severe damage of the middle ear structure and the presence of the cholesteatoma made bone conduction threshold increased. The postoperative thresholds of bone conduction were Improved in 36 cases (40.4%) of the 89 cases that underwent operation with type I tympanoplasty technique without electrie drilling. The degree of the maximal improvement was 14.3dB at 2000Hz and the minimum was 8.8dB at 250Hz. but these result did differ from a statistically significant degree. The result suggest that the bone conduction threshold in chronic otitis media is elevated artificially by conductive defect and improved by successful reconstructive surgery.

농부가 아닌 환자에서 발생한 긴털가루진드기(Tyrophagus Putrescentiae)에 의한 기관지천식 1례

최대로,김형수,고창옥,김희선,윤호성,박용범,김상훈,이재영 대한천식 및 알레르기학회 2004 천식 및 알레르기 Vol.24 No.1

Storage mites are believed one of the most important allergens in farmers and rural regions. Tyrophagus putrescenitiae, belonging to storage mites, is found not only within storehouses but also in the house dust, and the third most common mites following Dematophagoides farinae and Dermatophagoides pteronyssnus in house dust in Korea. The sensitization rate to Trophagus putrescentiae was reported as high as that of house dust mite in patients visiting the allergy clinic in large cities in Korea. We experienced a 69-year-old man who had suffered from dyspnea, wheezing, and coughing for 10 years. He retired from the teaching profession, and had lived in a large city. Deajeon. The skin prick test showed a positive reaction to Tyrophagus putrescentiae and negative reactions to house dust mites. The bronchial challenge test with Tyrophagus putrescentiae showed late asthmatic reaction. We confirmed a Tyrophagus putrescentiae induced asthma in non occupational setting. (J Asthma Allergy Clin Immunol 24 : 141-5, 2004)

파랑에 의한 항내진동의 제어에 관한 실험적 연구

최한규,이선용 江原大學校 産業技術硏究所 1994 産業技術硏究 Vol.14 No.-

This study is to investigate harbor oscillation phenomenon according to combination of the wall structures by model experiment in a three dimensional wave basin. Six different types of wall combination were chosen through combination of erect wall, erect dissipation block, and san beach, wave height at selected points in the harbor were measured by electronic wave gage. Test results show that the wall structure composed solely of erect walls showed generally highest harbor oscillation. Since natural beach shows lower reflection than erect dissipation block do, we thought it would be more efficient to use natural beach for improved harbor oscillation. The result showed, however, that the erect dissipation block are more efficient than natural beach to attain less harbor oscillation. The reason seens that the erect dissipation blocks have better capability to control breaking wave on the surface of the structure.

질소분압에 따른 TaNx coating층의 미세조직 연구

김선화,최용락 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3

TaNx film were fabricated for this research by the reactive magnetron sputtering process. In order to improve TCR, it was investigated the transformation of coated TaNx film. The variables were the N₂/Ar fraction and the thermal heat-treatment. The electrical resistance and the TCR of specimen were measured. It was observed the microstructure change under thermal heat-treatment by XRD experiment. Also the morphology of TaNx film was observed by SEM. As a result, TCR was stabilized when N₂/Ar fraction were 0.166 to 0.25. The phases of as-coated TaNx film were Ta, TaN, β-Ta and amorphous. The new phases, Ta₄N and Ta₃N?? were formed after thermal heat-treatment. As the ratio of nitrogen gas was increased, the morphology of the layer was changed to a discontinuous island particle. These results were consistent with results of electrical resistance change.

Bis-Diazotized Benzidine에 의한 연속 및 동시흡착법에 의하여 Tuberculin PPD로 감작된 적혈구를 이용한 혈구응집반응의 민감성

김택선,정상인,최철순,양용태 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.3

Passive haemagglutination test(PHA) using sheep red blood cells(SRBC) sensitized with soluble antigens by means of coupling agents, i.e., tannic acid, bis-diazotized benzidine(BDB), chromic chloride, glutaraldehyde, and so on, provide an extremely sensitive technique to detect a minute quantity of serum antibody as low as 0.01㎍. It also has advantage over agglutination and precipitation tests in that if it is transferred either to hemolysis test(PHL) or to inhibition test(PHI), soluble antigen-antibody complexes and incomplete or hapten antigen-nonprecipitating antibody complexes that are not detectable by other tests can be demonstrated. This study was undertaken to determine the optimum amount of BDB and tuberculin PPD antigen for consecutive and simultaneous coupling of SRBC in conjunction with the sensitivity of the PHA test. In addition, the sensitivities of PHA and PHL test were compared and the PHA units of antibody and diluents for tuberculin PPD antigen for PHI test were discussed. The results are summarized as follows: 1. The optimum amount of BDB for consecutive and simultaneous coupling of 0.2ml of 2.5% SRBC were 20㎍ and 13㎍, respectively, and the optimum amount of tuberculin PPD antigen were about 125㎍ and 250㎍ respectively. The optimum ratios between BDB and tuberculin PPD antigen for consecutive and simultaneous coupling were 1:6.3 and 1:19.2, respectively. 2. In the consecutive coupling, the PHA titre was linear to both BDB and tuberculin PPD concentrations, whereas in simultaneous coupling it was affected by the level of tuberculin PPD but not by that of BDB from 5㎍ to 13㎍. 3. Using SRBC sensitized consecutively with tuberculin PPD or sensitins prepared from four species of mycobacteria the homologous PHL tests were sensitive than the PHA tests by 1:2 to 1:4 dilutions, and the end-point of PHL test was more clear-cut than that of PHA test.

빈랑자 추출물의 염색성 및 기능성에 관한 연구

김지선,조용석,최순화 대한가정학회 2003 Family and Environment Research Vol.41 No.7

Recently there has been interested in the use of natural dyes in textile applications. Generally natural dyes can exhibit better biodegradability and have a higher compatibility with the environment. In this study, cotton wool and silk fabrics were dyed with alkali extract of Arecae semen using various mordants, and their dyeabilities were discussed. Additionally the fastness to washing, perspiration, light, rubbing, and drycleaning and UV-B protection rate were also investigated. Cotton, silk and wool fabrics dyed with alkali extract of Arecae semen were colored in reddish yellow tint. The optimum dyeing condition of the colorants extracted from the Arecae semen was three repeated dyeing at 95℃ for 1.5hrs. The dyed fabrics by using mordanting methods improved the fastness to washing, perspiration and drycleaning, but the fastness to light and rubbing were not increased. The UV-B protection rate of the wool fabrics were increased by dyeing with extract of Arecae semen.

Seed Germination in the Vitaceae : Ⅰ. Responses of Parthenocissus tricuspidata Seeds to Stratification and Temperature

金善圭,李大鎭,金吉龍,崔東龍,李英喆 충북대학교 농업과학기술연구소 1990 農業科學硏究 Vol.8 No.1

Influence of moist chilling at 3°C and subsequent germination temperature on seed germination of Parthenocissus tricuspidata (Sieb. & Zucc.) Planch. Was studied. 1.Seed germination of P. tricuspidata increased between 20° and 25°C by prolonged chilling of 8 to 12 weeks. 2.Percent seed germination was higher at 20°C than 25°C, but germination rate was higher at 25°C. 3.Length of time for germination(LTG) and germination span (GS) in days were decreased by prolonged chilling. LTG and GS were also lower at 25°C than 20°C. 4.P. tricuspidata seemed to be a dark germinating species.

장거리 달리기 선수에서 횡문근융해와 생화학적 지표의 변화에 대한 연구

안선호,최석채,김태현,나용호,송주흥,이영진,조지현,최석준 대한신장학회 2000 대한신장학회잡지 Vol.19 No.5

칼슘이 캠벨어얼리 葡萄나무의 揷木에 미치는 影響

金善圭,崔東龍,李英喆 충북대학교 농업과학기술연구소 1990 農業科學硏究 Vol.8 No.1

Effects of kind [Ca(OH)2 and Ca(NO3) 2] and concentration (0.15 and 1.0% ) of Ca and tap water treated for various time (1,2, and 4 days) to Campbell Early (Vitis labruscana B.) cuttings on bud-break, shoot growth, rooting, and respiratory activity were studied. 1.Percent budbreak increased by Ca for 2 days and tap water for 1 day treatments. 2.Prolonged soaking with Ca and water increased shoot growth at early stage. 3.Percent rooting and percent of well rooted cuttings at early stage were increased by various soaking treatments, but the effect was diminished as the application time prolonged. 4.Soaking treatments markedly increased the respiratory activity of the cuttings. Respiratory ac-tivity showed a proportional increase by tap water treatment, while with Ca, respiratory activity increased from 1 to 2 day's treatment regardless of the kind of Ca, and whether remained steady [Ca(NO3) 2] or decreased [Ca(OH) 2], thereafter. 5. Respiratory activity and final percent rooting correlated significantly, and correlation coefficients between respiratory activity and percent budbreak after 8 weeks and shoot length after 2 weeks were highly significant

經路分析을 通한 健康信念模型에 關한 硏究

洪大容,최학의,鄭善太 慶尙大學校 1985 論文集 Vol.24 No.1

A theoretical framework of "Health Belief Model" were used to examine the factors which are assumed to impact upon health belief and preventive action. The survey was carried out from Oct. 1 to 30, 1984 with a representative sample of middle and high school students (N=1.868) by structured questionaire. The results of zero-order correlation analysis, multiple regression analysis and path analysis were as follows : 1) The simple correlation analysis reveals that the variables affecting the preventive action are school grade(p<0.05), sex(p<0.05), area (p, 0.05), parent's education level (p<0.05). The results indicated that the higher school grade is, the more the preventive action is and urban area shows higher preventive action than rural area. Girl students showed higher preventive action than boy students. Parent's education level was proved to be effective on the preventive action, too. But pre-recommendation of preventive action showed non significant relationship with the preventive action, therefore it was not proved that the cue to action variables are important to explain health behavior. 2) According to the results obtained by multiple regression analysis, the threat about disease is affected by sex (β=0.1913), area (β=-0.0801), economic level (β=-0.0480) and academic a chievement (β=-0.0648) at very significant level (p<0.001). The perceived benefits of preventive action, considered to be as positive health belief variable turns out to be affected by parent's education level (β=0.0062), economic level (β=0.0661), academic achievement (f=-0.0330) and the knowledge about disease (β=0.1075) at very significant level (p<0.001). In this results, we can find the difference between positive health belief and negative health belief. On the contrary to the threat about disease, education was doing a very important role on the perceived benefits of preventive action. 3) The factors affecting the Preventive action were Proved to be school grade (β=-0.1138), sex (β=-0.0839), area (β=0.0866), economic level (β=-0.0438), the threat about disease (β=0.0439) and the Perceived benefits of preventive action (β=0.0424) (p<0.001). In point, we can find the preventive action is affected more by the threat about disease than by the perceived benefits of preventive action. Therefore it can be stressed that the promotion of the health behavioral change can be achieved effectively by negative health belief than by positive health belief in a city or rural area except metropolitan city. So we can say the different approaching method is needed according to the circumstances of each area to attain the desired end. 4) The path analysis shows the same results of the multiple regression analysis. Among the variables (individual characteristic variables, cue to action variable, health belief variables), only sex and health belief variables are affected more by causal effect than by non-causal effect. And the hypothesis, the health behavior are affected by health belief, is proved to be ture.