일부 농촌지역 여성들의 혈청지질치와 관련요인에 대한 조사

임정환,조영채,이동배 한국농촌보건회 1997 농촌의학·지역보건 Vol.22 No.1

酸化鐵의 CO/CO_2가스 還元速度에 미치는 不純物의 影響

金東義,裵錫煥 경북대학교 1985 論文集 Vol.40 No.-

The quantitative reaction of pure hematite and CO/CO_2 (80/20) gas mixture was studied at 900℃. Impurities such as CaO, SiO_2, and Al_2O_3 were added respectively to observe their effect on reduction of hematite. The micro-structure of reduced phases was observed by optical microscope and S. E. M. to investigate the depth of each phase. The results revealed that the change of reduction rate of pure hematite and added impurities increased rapidly to 30% and 39-50% respectively in the initial stage and then the reduction rate decreased, because the formation of dense iron layers by sintering and recrystalization surrounded partial reduced wu¨stite reflics, and this hindered the reducing gas diffusion. The reduction rate which impurities were added always is increased than that of pure hematite, was the maximum at 1.2wt.% regardless of its kinds of impurities. Each promoters is increased the reaction rate by the role of active center when the reduction is proceeding. The increased of reduction rate was proportional to ionic radius (r) and ionic charge (ε) of added impurities.

강원도 중학교 체육교사의 보건학습 지도 실태

이동욱,김승재,박기동,김세환 강원대학교 체육과학연구소 2000 江原大學校附設體育科學硏究所論文集 Vol.- No.23

The purpose of this study was to investigate current situations on middle school physical education(PE) teacher's health instruction in Kangwon-do. The results attained from 165 middle school physical education teacher's in Kangwon-do are listed below: 1.Although physical education recognize the absolute necessity of health instruction in middles schools in Kangwon-do, it can't be acknowledged that sufficient instruction is being performed due to numerous other reasons. 2.Mostly, physical education teachers are in change of health instruction, but sometime it is refered to nurse-teachers, 3.For appropriate health instruction, first of all, related teaching materials and training opportunities should be more available. Based on above conclusion, following suggestions are made: 1.Information about health instruction must be sought with a great weight when teachers have any training opportunity. 2.School classroom must equip necessary teaching materials for health instruction. 3.There have to be more opportunity for intensive training to teachers. 4.Health instruction includes subtle subjects like problems relates sex education. Physical education teachers be in change of course but it can asked to nurse teachers if it for a better quality of health instruction.(It should be more rational to request nurse-teachers if a young male physical education teacher is in a girl's school) Also, issues related to independence on health instruction subject must be carefully examined.

새로운 이핵 백금-디티올렌 화합물의 합성과 확인

노동윤,서은미,이명환 서울여자대학교 자연과학연구소 1997 자연과학연구논문집 Vol.8 No.-

중성 리간드인 dppf를 사용하여 새로운 백금 화합물을 합성하고 적외선과 자외선 분광법에 의해서 분석하였다. 적외선 분광법에 의해서 페닐기의 방향족 C=C의 신축진동이 1600cm-1~1400cm-1에서 확인되었으며, dmit 화합물에서는 1053.2cm-1에서 C=S 신축진동이, i-mnt 화합물에서는 2210.6cm-1에서 C=N 신축진동이 확인되었다. 자외선 분광법에 의해서는 400nm~500nm에서 매우 약한 페로센의 d-d 전자전이를 보였다. 또한 dmit 화합물에서 C=S의 전자전이가 466nm에서 관측되었다. New platinum(II) complexes containing 1.1'-bis(diphenylphosphino) ferrocene (dppf) as a neutral ligand and 1.2-dithiolenes (dmit : dimercapto isotrithione; dddt : 5.6-dihyro-1.4-dithiin-2.3-dithiolate; phdt : 5-phenyl-6-hydro-1.4-dithiin-2.3-dithiolate; dphdt :5.6-diphenyl-1.4-dithiin-2.3-dithiolate; mtdt : 1.2-bis(methylthio)ethylene-1.2-dithiolate) or 1.1-dihiolene (i-mnt : isomalononitriledithiolate) were synthesized in three-solvent system (benzene : methanol : water = 1 : 1 : 1). The single crystals were grown by diffusion method using dichloromethane and methanol in freezer. These compounds were characterized by FT-IR and UV-vis spectroscopic methods : In the FT-IR spectra, aromatic C=C stretching vibrations near 690~750cm-1 were observed in all Pt(dithiolene)(dppf) complexes. C=S stretching vibration of dmit ligand and C=N i-mnt ligand were also indexed at 1053.2cm-1 and 2210.6cm-1, respectively. electronic transition of phenyl group was observed between 215nm and 260nm while electronic absorption characteristic of C=S in dmit ligand appeared at 466nm in UV-vis spectra.

大氣汚染物質의 變異原性에 關한 硏究 : 마우스 母體 및 胎仔의 小核試驗을 中心으로

韓東宣,車喆煥,張聖薰,裵思相 고려대학교 의과대학 1989 고려대 의대 잡지 Vol.26 No.3

This Study aimed at identifying the cytogenic effect of air pollutants in pregnant mouse and her fetus. Samples of air pollutants were collected by the high volume air sampler in several sites of Seoul from May through December in 1988. Total suspended particulates (TSP) were measured and those of benzene and methanol were extracted and dissolved in dimethyl sulfoxied (DMSO). Those were injected into peritoneal cavity by the concentration and the micronucleated polychromatic erythrocyte (MNPCE) was observed in the bone marrow of mother mice. IN addition, the liver of fetus was extracted and MNPCE was observed. Transplacental genetic toxicity due to air pollutants in both cases was measured in the end. 1. In case of the tar concentration equivalent to those residing in the volume of 100m³ of air, the MNPCEs in the mother's bone marrow were 0.57±0.15% and 0.70±.20% in Shinchon; 0.27±0.17% and 0.40±0.13 In Jungrung and in the underground shopping center ; 0.33±0.10% and 0.55±0.13% in the subway station. The MNPCEs measured in the sample of the tunnels, of which tar concentration was equivalent to that in 50m³ and 100m³ of air, were 0.86±0.24% and 1.06±0.17% in tunnel A and 0.70±0.15% and 0.96±0.23% in tunnel B; those were the highest MNPCE in the samples of mother mice. 2. The MNPCEs measured in the liver of featus were 0.60±0.25% and 0.80±0.15% in Shinchon. In Jungrung and the underground shopping center, the MNPCEs in the liver of fetus were the same as those in mothers. In the sample of the subway station, the MNPCEs in the liver of fetus, 0.73±0.20%, were higher than in mothers only in the 200? tar concentration. The MNPCEs in the 50m³ and 100m³ tar concentration were 0.87±0.10% and 1.27±0.27% in tunnel A, and 0.68±0.41% and 1.07±0.23% in tunnel B. It showed that the MNPCEs only in the 100m³ tar concentration were higher than those in mothers.

들깨鍾子의 休眠에 미치는 貯藏濕度의 影響

徐東煥,李憂升 慶北大學校 1992 論文集 Vol.52 No.-

25 cultivars of perilla seeds were stored in air dry room condition after harvest. Seed samples were taken from the seed in storage and tested for germination at 25℃ to study the natural dormancy of the perilla seed. In air dry room, natural dormancy periods ranged from 51 to 71 days in cultivars for leave, from 28 days of the shortest ‘Daegugal’to 78 days of the longest ‘Daemyounghuk’in oil seed cultivars, and from 18 days of the shortest ‘India’to 61 days of ‘Baegimsogal’and ‘Hugim’. Dormancy period of ‘Jukjaso’was 152 days and other cultivars in Jaso group ranged from 62 to 72 days. The seeds of seven cultivars of perilla were stored in various levels of relative humidity from November 11 to March 31 Following year. Germination of ‘Gimhae’and ‘Gyungsanbaek’was conspicuously delayed at low storage humidity. The dormancy period of two cultivars were 51 days after harvest at RH100% and 121 days and 131 days at RH 30%, respectively. Thus, the lower storage humidity, the longer dormancy period. Above results indicate that excessive drying of perilla seeds after harvest causes inferior germination and delays dormancy break. Therefore, perilla seed should not be stored in excessively dry condition.

印刷出版業 勤勞者 尿의 突然變異誘發性에 關한 調査硏究

宋東彬,車喆煥,金永煥 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.1

As a part of the human population monitoring on the mutagenicity of environmental pollutants in industrial working sites, this study was performed with a purpose of examining the mutagenicity in urine of printing workers who are exposed to pollutants such as lead and certain organic solvents. Also, environmental monitoring of major pollutants of ambient air in printing indutries, such as lead, toluene, xylene, benzene and methyl ethyl ketone (MEK), was carried out to correlate the relationship between mutagenicity and environmental chemicals. In addition, the relationship between mutagenicity and other factors such as age, career, smoking amount and the amount of urinary hippuric acid, the major metabolite of toluene, was evaluated. The test method employed in studying the mutagenicity in urine was Ames test using Salmonella typlumurium TA98. The mutagenic activity was calculated based on urinary creatinine levels and spontaneous revertants. The subjects of this study were 95 line-workers(esposed group) and 27 clerks (unexposed group) from 3 printing industries. The line-workers mere from the type picking and setting, photolithographing, offset printing and gravure printing part. The results are as follows : 1. The mutagenic activity in urine from printing works was 92.7, which is 2.5 times higher than that of the control group (35.0). Especially, the smokers of gravurers showed the highest mutagenic activity of 183.9. 2. The mutagenic activity of smokers in the unexposed group was 2.7 times higher than thar of the nonsmoker, while in the exposed group the mutagenic activity of smokers was only 1.3~1.5 times higher than that of the unexposed group. 3. The mutagenicity in urine of printing workers showed a strong correlation with the air concentration of organic solvents (r=0.54). On the other hand, little correlation was seen with the amount of hippuric acid in urine (r=0.11). 4. The age, career and smoking amount of the workers showed no remarkable correlation with the mutagenic activity in urine.

레이저 박피술의 피부면적 감소효과와 레이저 punch out 병변의 치유에 대한 실험적 연구

강동희,윤을식,구상환,안덕선,박승하 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3

An experimental study was designed to analyze the surface reduction effect of ultrapulse carbon dioxide laser on the skin of guinea pigs receiving laser resurfacing. Two squares of skin measuring 3x3 ㎠ were designed on each side of the abdomen of guinea pigs(n=10). Five animals received laser resurfacing on their abdomen at energy of 250mJ/5 watt, and five other animals received 500 mJ/5 watt. On each animal, the left side square was treated with one pass of a CO2 laser, and the right side q=square was treated with two passes using a C.P.G. scanner. The size of the resurfacing area was determined by celluloid overlays at 1,2,3,4 and 6 weeks. Immediately following laser resurfacing, the area was decreased to 69%(left side) and 56%(right side) of the designed area in the 250 mJ/5 watt group, and 59% and 40% in the 500mJ/5 watt group. After 6 weeks, the resurfaced area had been reduced to 70% and 56% of the designed area in the 250mJ/5 watt group, and 60% and 40% in the 500mJ/5 watt group. As a result, the effect of surface reduction by CO2 laser resurfacing increased at a higher power and when more passes of the ultrapulse carbon dioxide laser were applied. The laser treated skin continued to maintain its contracted dimensions. These findings suggest that ultrapulse carbon dioxide laser may be an effective treatment method for rhytides. Another experiment was performed on multiple punch-out lesions on guinea pig skin(n=2) with 1,2,3 mm collimated hand pieces for the purpose of determining a new laser treatment method. After 4 weeks, on gross and histological examination, there were no differences in the healing of multiple punch-out lesions and the healing of punch-out lesions was complete without any scarring. These findings suggest that the laser punch-out method can be used for the treatment of acne scars.

스탬핑 성형해석을 위한 유한요소의 자동생성

유동진,윤정환 대진대학교 생산기술연구소 1999 생산기술연구소 논문집 Vol.2 No.-

In the present study, a general method for the mathematical description of arbitrarily shaped surface is proposed by introducing the parametric surface. A polynomial function is employed to descrive the base parametric surface and the boundary curves are defined to describe arbitrary three - dimensional trimmed surfaces. For the mesh generation of initial sheet blank, a grid-based mesh generation algorithm using quadtree is proposed. In order to generate the finite element mesh for tool surface, a hybrid method based on the grid approach and the Delaunay triangulation if proposed. To verify the validity of the proposed method, automatic mesh generation is carried out for some chosen complicated parts including actral automotive panel.

한국인 손의 동맥 분포에 관한 연구

이동락,장가용,김진환 大韓成形外科學會 1985 Archives of Plastic Surgery Vol.12 No.1

The arteries of the hand from several diversified pattern that pemit classification into well defined categories. Many of the deviations can be explained on an embryological basis. The superficial volar arch can be divided into 2 large groups: those with complete arches and those with incomplete arches. A complete arch is present in about 76 percent of cases. It is further subdivided into 4 types, based upon the method by which the contributing arteries join. The incomplete arches can be divided into 4 types. The median artery enters into the formation of the superficial palmar arch in about 10 percent of cases. There were 6 different pattern of branching of the superficial palmar arch. A reciprocal relationship with respect to size usually occurs between the common palmar digital arteries and the palmar metacarpal arteries of the deep palmar arch. The deep volar arch is less variable than the superficial arch. Two deep palmar branches of the ulnar artery are usually present, either one or both of which may contribute to the deep arch. The deep arch is complete in 93% of cases. Usually the caliber is reciprocal to that of the superficial arch.