실리카 입자를 함유한 광경화형 도료 물성

홍진후,주형태,김순기,김석찬 조선대학교 생산기술연구소 2004 生産技術硏究 Vol.26 No.1

We investigated the effects of nano-silica on the kinetic and film properties of UV curable coatings. Coating properties such as hardness, gloss, chemical and stain resistances and adhesion of the UV cured films containing various concentration of nano-silica were investigated. The matting, pencil hardness, chemical resistance, and abrasion resistances were apparently improved Via addition of nano-silica. Pendulum hardness was also enhanced with the increasing content of nano-silica up to 5 weight percent. However, the pendulum hardness and the adhesion decreased as nano-silica content increased above 10 weight percent. DPC analysis revealed that the presence of nano-silica in UV curable coating formulation enhanced photo curing. It was demonstrated that hardness. abrasion resistance, and chemical resistance of UV cured film can be increased without loss of optical properties through nanocomposite.

침전법에 의한 알루미나 분말제조 IV.ZrO₂의 분산에 의한 Al₂O₃/ZrO₂ 복합체의 제조 및 기계적 특성

홍기곤,이홍림,이형직,이호순 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.2

In this study, a precipitation method, one of the most effective liquid phase reaction, was adopted in order to prepare high-tech Al₂O₃/ZrO₂ composite ceramics. Al₂(SO₄)₃·18H₂O, ZrOCl₂·8H₂O and YCl₃·6H₂O were used as starting materials and NH₄OH as a precipitation agent. Fine powders were prepared at optimum calcination condition. Sinterability of each fine powder and the effects of ZrO₂ on the grain size and mechanical properties of Al₂O₃ were investigated. The composition of Al₂O₃/ZrO₂ composites was fixed as Al₂O₃-15v/o ZrO₂(+3m/o Y₂O₃). The effect of MgO on the grain size of Al₂O₃ZrO₂ ceramics was also investigated.

인슐린 비의존형 당뇨병 환자에서 24시간 혈압 변동 및 요중 알부민 배설량에 관한 연구

주기산,안기완,정종훈,배학연,홍순표 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Recently, blood pressure(BP) starts to increase in close relationship to development of persistent microalbuminuria in diabetes. Thus, author studied 24-hour BP changes in diabetics compared to the those in nondiabetics and the changes of urinary albumin excretion (UAE) according to 24-hour BP changes in diabetics with microalbuminuria. Twenty-four-hour ambulatory blood pressure monitoring(ABPPM) was performed in 38 NIDDM patients(18 normotensives and 20 hypertensives) and in 37 control subjects without diabetes(18 normotensives and 19 hypertensives) . Also 24-hour ABPM was performed in 38 diabetics (20 microalbuminurit and 18 normoalbuminuric). The analysis of individual recordings allowed us to detect an impaired circadian pattern(the disappearance of the nocturnal BP decrease or a paradoxical BP increase) in 30% of the normotensive and 31% of the hypertensive diabetics. Twenty-four-hour ABPM(night systolic/diastolic ±SD mmHg) was significantly higher in microabluminuric(124.2 ±11.4/75.1±8.2 mmHg) than in normoalbuminuric subject, (114.0±7.6/64.6±6.6 mmHg, p<0.05). This study suggests that not only awaking BP but also especially day-night minimum SBP decrease are highly responsible for the renal impairment in NIDDM patients, unrelation to hypertension. Thus. ABPM reflects the association between UAE and blood pressure in diabetics more precisely than clinical measurements. and a significant correlation exists between rate of increase in Urinary albumin excretion and blood pressure in diabetics.

보호관찰대상자의 NEO-PI-R 성격 특성과 심리적 성장환경에 관한 연구

박지홍,차타순 부경대학교 학생생활연구소 2001 學生生活硏究 Vol.17 No.-

The purposed of the study were to investigate the personality traits of the NEO-PI-R and the Psychological Growth Environment for the probationers through the analysis of the personality traits, the psychological growth environment and the personality traits according to the parents images of the probationers groups. One hundred twenty probationers and one hundred twenty one high school students in Pusan were thested by the NEO-PI-R in Korean version and the Psychological Growth Environment. Major findings from this study are summarized as follows; 1)The probationers show lower scores in self-consciousness, fantasy, aesthetics, feelings, actions, idears, valus, altruism, competence, dutifulness, deliberation of the NEO-PI-R than the normal groups. 2)The probationers show lower scores in achievements, mutual role expectations, mutual intimacy, love, receptivity of Psychological Growth Environment than the normal groups. 3)The probationers felt their parents democratically show higher scores in warmth, gregariousness, positive emotions, trust of NEO-PI-R than those felt their parents autocratically or noninterventionall

위팔동정맥루 구제를 위한 노쪽피부정맥의 지연 표재전위 : A Case Report

이홍기,박훤겸,남영수,백홍규,전순호 대한혈관외과학회 2004 Vascular Specialist International Vol.20 No.1

과민성 장 증후군의 증상 경감을 위한 비약물적 접근 고찰

최명애,김금순,안경주,채영란,최정안,홍해숙,박미정,이경숙,신기수,정재심 대한기초간호자연과학회 2005 Journal of korean biological nursing science Vol.7 No.2

There have been many trials of clinical efficacy of multicomponent and single component treatments for irritable bowel syndrome(IBS). We reviewed effects of non phamacological treatments in the IBS. Though the efficacy of multi-component approaches was unclear, several results suggest that cognitive behavioral therapy was effective in improving gastrointestinal symptoms of IBS. As a single component, cognitive therapy and relaxation with or without biofeedback could improve the symptoms and psychological health of IBS patients. Yoga, meditation, self-help information and hypnotherapy could be applicable to IBS.

결핵치료제인 시판 리팜피신제제의 생체내 이용율

김종두,안기완,서영환,조경상,김철,김상도,홍순표 朝鮮大學校 附設 醫學硏究所 1992 The Medical Journal of Chosun University Vol.17 No.1

This study was attempted to investigate the dissolution rate and the bioavailability of commercially available rifampicin preparations after oral administration in nine normal volunteers. Cross-over design was used for the analysis. The dissolution test was conducted in artificial gastric juice and artificial intestinal juice using basket method with four rifampicin preparations (A, B, C, and D) which were pharmaceutically equivalent. The results were as follows; The dissolution rate was higher in the order of A>C>B>D in artificial gastric juice, and A>B>C>D in artificial intestinal juice. Area under the blood concentration time curve (AUC) was larger in order of A>C>B>D. Relative bioavailability(%) of rifampicin preparations were 93.6% for B, 97% for C, 84.4% for D preparation compared with standard A preparation. Peak blood concentration (Cmax) was higer in order of A>B>C>D. Peak time (Tmax) was larger in order of D>C>A>B. Absorption rate constant (Ka) was larger in order of B>A>D>C. there was little difference in elimination rate constant and biological half-life. The correlation of the dissolution rate in artificial gastric juice and area under the blood concentration time curve as well as correlation of the dissolution rate in artifical intestinal juice and peak time showed significant linear relationship. From the result of the this experiments, it can be concluded that for the choice of preparations, bioavailability must be performed in man because the bioavailability of rifampicin preparations showed big differences among commercial preparations which were abvertised as pharmaceutically equivalent, and that the bioavailability of rifampicin preparations in man partially could be predicted from the results of dissolution rate.

피조개 발의 점액질에 대한 조직화학적 연구

최병태,조기진,홍말숙,정권순,조운복 釜山大學校 師範大學 1995 교사교육연구 Vol.31 No.-

피조개 발의 조직학적 구조는 hematoxylin-eosin염색 및 Weigert iron hematoxylin염색을, 점액질 성상을 검색하기 위하여 PAS반응, diastase 침지 후 PAS반응, alcian blue pH 2.5염색, alcian blue pH 1.0염색, alcian blue pH 2.5-PAS염색, alcian blue pH 1.0-PAS염색, aldehyde fuchsin pH 1.7-alcian blue pH 2.5염색 및 0.25% toluidine blue염색을 실시하였다. 피조개의 발은 상피, 상피하결합조직 및 근층으로 이루어져 있었으며 상피는 단층섬모원주세포로 되어 있었다. 상피하결합조직 및 근층에 다세포성 점액선인 발선이 발달되어 있었고 도관은 결합조직과 상피세포를 거쳐 개구되어 있었다. 근층은 종주근, 수직근 및 횡근섬유로 구성되어 있었다. 점액질의 조성을 보면 상피세포섬모에는 sialomucin만을, 상피세포는 중성점액질만 함유하고 있었다. 상피세포 및 결합조직내 점액도관에는 산성과 중성점액질의 혼합성인 것과 산성점액질만 함유한 것이 혼재하나 전자가 더 많았다. 산성점액질의 성상으로 보아 대부분이 강 sulfomucin을 가지며 일부는 약 sulfomucin과 sialomucin의 혼합성이었다. 대부분 발선의 점액선포에 대한 점액질 조성은 점액도관과 유사하였으나 일부 상부발선의 점액선포는 중성점액질만을, 하부발선의 점액선포는 sialomucin만을 함유하였다. This study was performed to investigate the histological structure and the histochemical properties of the mucosubstances in the foot of Anadara broughonii. For the histological structure, hematoxylin-eosin and Weigert iron hematoxylin staining were used. The mucosubstances stained with PAS, PAS-diastase, 0.25% toluidine blue, alcian blue pH 2.5, alcian blue pH 1.0, alcian blue pH 2.5-PAS, alcian blue pH 1.0-PAS, aldehyde fuchsin pH 1.7-alcian blue pH 2.5 methods. The foot was composed basically of three layers: epithelium, subepithelial connective tissue and muscular layers. The foot was lined by simple ciliated columnar epithelial cell. Foot glands consisted of multicelluear mucous acini were present in the subepithelial connective tissue and muscular layer. The mucous duct of foot glands was distributed from connective tissue to epithelial cells, and open onto the surface of the foot. The foot muscle traveled in three planes as longitudinal, transverse and vertical muscle fiber. About the properties of mucosubstances on the foot, cilia of epithelial cell contained sialomucin only and epithelial cell neutral mucosubstances only. Most of mucous duct within epithelial cells and connective tissue showed a mixture of acidic and neutral mucosubstances, while a few mucous ducts were contained acidic ones only. Among acidic mucosubstances, notable strong sulfomucin were found in most mucous cell of duct, and a mixture of weak sulfomucin and sialomucin appeared in a few cells. The properties of mucosubstances in the food glands were similiar to those of mucous duct. But a few mucous acini contained neutral mucosubstances and sialomucin only in upper and lower portion of foot gland, respectively.

산업근로자의 식생활 의식행태 조사

김무룡,황연자,차경미,이순자,위광복,남철현,김기열,김홍길 慶山大學校 保健福祉硏究所 1997 保健福祉硏究 Vol.1 No.-

This study was carried out to grasp the awareness and habits of food intake and use the information for health education program in order to help healthy dietary life. The survey was done in cooperation with health manager in industries on 1,200 workers who was selected randomly from 5 types of industries from Sep. 2 to Oct. 31, 1995. The results are summarized as follows: 1) The percentage of subjects who assess themselves "Healthy" was more higher in female, in 20∼29 age group, in single, in daytime workers, in college graduate than other groups respectively. 2) As for the degree of health education satisfaction, 35.5% of the subjects answered "dissatisfaction" 3) As for the exercise, 52.7% exercised for their health and the rate of exercise was more higher in male, in 30 years age group, in single than other groups respectively. 4) The rate of smoking was 57.6% and the rate of drinking alcohol was 47.3%. 5) 92.8% of the subjects got stress everyday and the rate is more higher in female, in less than 19 years old, in single, in longer working duration, in lower income, in high school graduates, in workers of product field line than other groups respectively. 6) As for drinking times of coffee or soft drink, two times per day was 29.5%, more three times per day was 28.0%. As for the eating speed of meal, 46.0% of the subjects answered "fast" and the rate was more higher in male, in 30 years age group, in married group, than other groups respectively. 7) With regard to the level of preference to instant food, 23.1% preferred to take instant food. As for the level of preference to hot and salty food, 28.1% preferred to have hot and salty food. 8) The score of eating behavior was 3.38±32 point to 6 point full marks. 9) With regard to the correlation among related variables, the variables of gender, marital status and working duration had positive relation with the variables of regular meal intake, the preference to food intake between regular meals.

대동맥 이첨판과 승모판 이탈증을 동반한 대동맥 판하부 협착 1예

김용화,장경식,양태영,임영국,안기완,홍순표 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Discrete subaortic stenosis is a rare cardiac disorder especially in Orientals which occupies eight to ten percent of aortic stenosis, It occurs mainly before age of eighteen and accompanies with aortic valve abnormalities such as aortic stenosis, supravalvrlar stenosis, bicuspid valve and muscular hypertrophic subaortic stenosis, and other cardiac abnormalities such as ventricular septal defect, pulmonary stenosis and coarctation of aorta. There is no report of discrete subaortic stenosis accompanied with mitral valve prolapse. The major complications of discrete subaortic stenosis are aortic insufficiency, and subacute bacterial endocarditis. We report a case of asymptomatic nineteen-year-old male of discrete subaotic stenosis with bicuspid aortic valve and mitral valve prolapse, which is comfirmed by two-dimensional and Doppler echocardiography including transesophaigeal echocardiography.