모 통신관련, 사업장 연작업자들의 건강수준 평가

장덕희,황보영,리갑수,김화성,이성수,안규동,이병국 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1

To evaluate the health status of lead workers in telecommunication industry, author studied 369 male workers working in a telecommunication industry. Study variables chosen were blood zinc protoporphyrin(ZPP), hemoglobin, serum glutamic oxalacetic transaminase(SGOT), serum glutamic oxalacetic transaminase(SGPT), γ-glutamyltrans-peptidase(GGT) and hepatitis B virus antigen and antibody. Personal data such as smoking and drinking habit, work duration were also collected. 15 lead related symptom questionnaires were provided to all lead workers and filled up by themselves and reconfirmed by physician. The results were obtained as follow; 327 workers(89%) among 369 workers were healthy and 42(11%) workers abnormal health state. 9 workers were disease state among 42 workers those who were abnormal health state. The most frequent disease was liver disease(52.4%), and next was hypertension(26.2%) and then anemia(9.5%), hyperlipidemia(4.8%) and pulmonary tuberculosis(4.8%) in order of frequency. There was no case of lead intoxication. The mean of blood ZPP concentration of study subjects was 14.4±6.9㎍/㎗ and maximum blood ZPP concentration was 48.0㎍/㎗. The means of GOT, GPT and GGT were 29.4±10.0unit/L, 19.7±14.4unit/L and 38.7±31.5unit/L, respectively. The prevalence rate of hepatitis B virus antigen was 6.8% and the one of hepatitis B virus antibody was 43.6%. The symptoms with high prevalence rate above 40% were six; 'loss of appetite', 'frequent numbness of fingers or feet', 'feeling tired or fatigue generally', 'becoming nervous or sensitive to not important things', 'feel dizziness when standing up', and 'feel sleepy frequently'. The prevalence rate of symptoms were increased by the increase of age. The prevalence rate of symptoms were higher in smoking group and drinking group than non-smoking group and non-drinking group, respectively.

플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

젖소 足皮膚炎에 대한 오존연고의 治療 效果

이수진,전무형,조성환,김덕환,박창식,김명철 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

Thirty dairy cows with pododermatitis were selected and treatment effect of ozone ointment for bovine pododermatitis was investigated. In addition, bactericidal effect of ozone ointment on etiological agent of bovine pododermatitis was evaluated. The pathohistological examination for the pododermatitis, according to application with ozone ointment was investigated. Thirty dairy cows were divided two groups: control group(vaseline group: 15 cows), treatment group(ozone ointment group: 15 cows). Various parameters were evaluated in terms of the lameness score, swelling score, lesion score, WBC, neutrophil, pathohistological finding, and antimicrobial action. As compared with vaseline group, ozone ointment group revealed significant decrease of lameness (p<O.05), swelling (p<O.O1) and lesion score (p<O.05) were shown in hoof lesions on 14 days after application. In hematological findings, WBC count revealed slightly high values within normal range before treatment, however, this was I Corresponding author improved on 14 days after application of ozone ointment. The number of neutrophils was slightly higher than that of normal, however. this was improved on 14 days after application of ozone ointment. In pathohistological findings, normal dermal tissue was found in tissues with pododermatitis on 14 days after application of ozone ointment. In antimicobial action, marked decrease rate of bacteria was observed in feet of all cases treated with ozone ointment. The decreasing rate of bacteria in anaerobic culture was higher than that in aerobic culture.

2 Parameter Criterion을 이용한 안정성 평가에 관한 연구

이종형,유덕상,박무수 國立金烏工科大學校附設生産技術硏究所 1997 産業技術開發硏究 Vol.13 No.-

In this paper, the following results about character stics of surface fatigue crack are obtained by △p decreasing experiment and crack generation using SPPS 42 of pipe-use carbon steel. The △Kthe of surface crack is smaller than the △Kth of through crack. Therefore, if the △Kth of through crack is used as defect estimation, it becomes dangerous. The validity of Engineering safety is represented establishing fatigue fracture estimation diagram by the 2 parameter criterion of threshold and fatigue limit.

동물원에서 사육중인 Japanese Macaque (Macaca fuscata)에서 Zoletil 마취에 관한 연구

이재일,이수진,홍성혁,신남식,김덕환,박창식,전무형,조종민,김영석,김명철 충남대학교 형질전환복제돼지연구센터 2004 논문집 Vol. No.8

To evaluate the effects of Zoletil (tiletamine-zolazepam) that have been widely used for the chemical restraint and anesthesia of primates, on physiologic alteration, blood gas analysis and anesthetic duration in the Japanese macaque(Macaca fuscata), this study was carried out. Zoleril was administered by intramuscular injection, Evaluation of temperature, heart rate, respiration rate and blood gas analysis were performed before administration ancl at 1,10, 20, 30, 40, 50 and 60 min after administration, and induction and maintenance time was recorded. There was no significant difference in heart rate, PCO₂PO₂after Zolcril administration and temperature, respration rate, pH were significant difference compared with those of before administration, The induction time was 2.5±l.Omin and maintenance time was 86±23.2min. It was considered that Zoletil could he usefully used for the sedation and immobilization of Japanese macaque reared in zoological garden.

벤처기업 성공요인에 관한 이론적 고찰

李章雨,張壽德 한국중소기업학회 1998 기업가정신과 벤처연구 Vol.1 No.2

A main purpose of this study is to establish the conceptual framework for identifying success factors of technology-based small ventures(venture companies). For the purpose, the existing studies on start-up company, entrepreneurial firms, small firms with competitive advantage against large firms, high-tech firms, technology-based firms, and venture-capital vacked firms were reviewed. We found that factors such as characteristics of entrepreneur, environment, competitive strategies, resource capabilities, and organizational structure have been considered as the main influences on the performance of venture business. With a conceptual framework, we suggest 12 propositions which explain the impact of the success factors on venture performance.

부틸메타크릴레이트의 환경친화적인 광중합 및 열분해특성

이내우,최재욱,설수덕 한국산업안전학회 2002 한국안전학회지 Vol.17 No.2

This study is the series of photopolymerization on alkyl methacrylate(AMA) to continue further research. The objective of this work is to investigate the environmental fraternitive characteristics of photopolymerization kinetics on n-Buthyl methacrylate(BMA) and comparing the decomposition behavior to other AMA. The experiment was done in aqueous solution under the influence of photo-initiator concentration(0.05~0.25㏖/l), light intensity(5000~9000??/㎠) and monomer concentration(2.0~6.0㏖/l). n-BMA was polymerized to high conversion ratio using hydrogen peroxide(H_2O_2), and the kinetics model we have obtained is as follows. R_p=k_p[S]^0.24[M]^0.33[L]^1.53exp^(27.19/RT) The differential method of thermogravimetric analysis(Friedman method) was used to obtain value of activation energy on decomposition reaction. The average value of it was 27.5㎉/㏖.

에틸메타크릴레이트의 환경친화적인 광중합특성에 관한 연구

이내우,최재욱,설수덕 釜慶大學校 2001 釜慶大學校 論文集 Vol.6 No.-

Photopolymerization, the utilization of electromagnetic radiation(or light) as the energy source for polymerization of functional monomers, oligomers is the basis of important commercial processes with broad applicability, including photoimaging and UV curing of coatings and inks. The objective of this study is to investigate the characteristics of environmental fraternitive photopolymerization of ethyl methacrylate(EMA). This work is the second step to continue further research about alkyl methacrylate. The experiment has been carred out in aqueous solution under the influence of photo-initiator concentration(0.05∼0.25mol/H_2O_2), light intensity(5000∼9000μJ/cm^2) and monomer concentration(2∼6mol/EMA). EMA was polymerized to high conversion ratio using hydrogen peroxide (H_2O_2), and the kinetics model which we have obtained is as follows. R_P=k_p[S]^0.28[M]^0.41[L]^1.58exp^(33.30/RT) The differential method of thermogravimetric analysis(Friedman method) was used to obtain value of activation energy on decomposition reaction. The average value of it is 31.9 kcal/mol and is similiar to the activation energy of orginal polymerization.

Stuides on Histone ( Ⅵ ) : Histones from Normal and Myelocytic Leukemia Leucocytes

이근배,이희성,전재수,최재득 생화학분자생물학회 1980 BMB Reports Vol.8 No.1

The five major fractions of histone from normal and myelocytic leukemia leucocytes were prepared by the procedure of Johns. Electrophoretic behaviors on acrylamide gels and amino acid composition of various histone fractions from normal and leukema leucocytes: were compared:: The results obtained were as follows 1. The yields of whole hisfome isolated from normal and : inyelocytic leukemia leucocytes recovered were 37.08㎎ and 58.64㎎ per lg packed cells, respectively. 2. A marked increase in the amount of fraction KAS (f2b) from leukemia leucocytes was observed. These events were apparently correlated with a parallel decrease in the fractions KAP (f1) and ARE (f3). The .amount of fraction fZa (GRK+LAK) was almost to those of corresponding fraction of normal leucocytes. 3. Amino acid analysis showed the fraction ARE (f3) from leukemia cells contained markedly greater amounts of e-N-monomethyllysine and e-N-dimethyllysine than that from the normal cells.

젖소 足皮膚炎에 대한 오존수의 治療 效果

이수진,조성환,전무형,김덕환,박창식,한홍율,김명철 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10

This study was carried out to determine therapeutic the effect of ozonated water therapy on bovine pododermatitis. In addition, bactericidal effect of ozonated water on etiological agent of bovine pododermatitis was examined. The pathohistological examination for the pododermatitis, according to application with ozonated water and ozone ointment was investigated. Thirty healthy cattle were divided two groups(each of 15) : control group (povidone group), treatment group (ozone solution group). Various parameters were evaluated in terms of the lameness score, swelling score, lesion score, WBC count, neutrophil count, pathohistological finding, and antimicrobial action. The decrease of lameness and lesion score were shown in hoof lesions on 14 days after application of ozonated water. Significant decrease of swelling was shown in hoof lesions on 14 days 1 Corresponding author after application of ozonated water(p < 0.01). In hematological findings, WBC count revealed values within normal range. The number of neutrophils was slightly higher than that of normal, however, this was improved on 14 days after application of ozonated water. In pathohistological findings, recovery was rapid macroscopically and microscopically in the treatment with ozonated water on the hoof lesions and ozonated water was effective. In antimicobial action, bactericidal effect was observed in treatment with ozonated water on the hoof lesions and ozonated water was effective.