이황화탄소 폭로가 혈압과 콜레스테롤치에 미치는 영향

洪起天,李恩一,金光鍾 고려대학교 의과대학 1994 고려대 의대 잡지 Vol.31 No.3

To study the effects of exposure to carbon disulfide on blood pressure and serum cholesterol level, we gathered the informations from file of the periodic health examination for occupational disease, the periodic health examination for general disease and medical records in, Wonjin factory clinic. The study subjects were 266 workers who had worked in spinning department as exposure group, and 207 male office workers and 59 female office workers as non-exposure group. The results are as follows; 1. The slope coefficients of systolic blood pressure(as dependent variable) and age and exposure duration(as independent variable) were 0.013 and 0.066 respectively in exposure group. And the slope coefficients of diastolic blood pressure(as dependent variable) and age and expoure duration(as independent variable) mere 0.010 and 0.051 respectively in expoure group. 2. The slope coefficients of systolic blood pressure(as dependent variable) and age and tenure duration(as independent variable) were 0.019 and 0.009 respectively in male unexposure group, and were 0.032 and 0.018 respectively in female unexposure group. And the slope coefficients of diastolic blood pressure(as dependent variable) and age and tenure duration(as independent variable) were 0.016 and 0.009 respectively in male unexposure group, and were 0.019 and 0.033 respectively in female unexposure group. 3. The slope coefficient of exposure duration was greater than that of age in exposure group and that of age was greater than that of tenure duration in male unexposure group. 4.There was no significant difference of blood pressure between the exposure and non-exposure group. 5.The slope coefficients of Serum cholesterol(as dependent variable) and age and exposure duration(as independent variable) were 0.03 and 0.035 respectively in exposure group. The slope coefficients of serum cholesterol(as dependent variable) and age and tenure duration(as independent variable) were 0.102 and -0.012 respectively in male unexposure group. And the slope coefficients was very low in female unexposure group. 6. The slope coefficient of exposure duration was similar to that of age in exposure group, and only age was positively related to serum cholesterol in male unexposure group.

쓰레기 소각재를 잔골재로 혼합한 콘크리트의 기초적 물성연구

홍기호,하상훈,김정규,어석홍 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-

The purpose of this study is to investigate the material characteristics and strength properties of concrete mixed with waste incinerated bottom ash(BA), and to evaluate the leaching of environmentally harmful heavy metals from the bottom ash itself and from hardened concrete mixed with bottom ash. For this purpose, two reference mixed with W/C ratio of 0.45 and 0.55 were used, and the replacement proportion of BA was varied with ratios of 0, 30, 50, 70 and 100% by volume of fine aggregate in the reference mixes. The variation of compressive and splitting tensile strength, workability and unit weight of concrete were considered. Test results showed that the strengths, workability and unit weight decreased with increase in proportion of BA replaced. Leaching test results showed that there would be no environmentally harmful problem from using BA as substitutes of fine aggregates in concrete.

유전치의 전장피개수복 : 증례보고

홍기상,이상훈,장기택 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2

치아우식증, 외상, 발육성 결함으로 광범위한 수복이 필요한 유전치의 치료는 소아치과의사에게 있어서 매우 까다로운 문제이다. 이상적인 수복수술은 강도, 내구성, 심미성과 장착의 효율성을 모두 갖추어야 한다. 이에 행동조절문제가 있는 어린이를 치료하는 기술적 문제를 더하면, 여러 가능한 수복 방법 중에서 적절한 술식을 선택하는 것은 어려운 일이다. 현재 사용되는 수복술식에는 복합레진의 접착을 사용한 celluloid strip crown, conventional stainless steel crown, open-faced stainless steel crown, commercially 및 chairside veneered stainless steel crown과 epoxy-coated stainless steel crown 등이 있다. 이 모든 술식이 나름대로의 기술적, 기능적 또는 심미적 단점을 갖고 있어 각각의 효율적이고 효과적인 사용을 위해서는 적절한 선택이 중요하다. 이에 저자는 이러한 여러 가지의 전장피개수복 방법을 사용해 유전치를 치료하여 그 결과를 보고하는바이다. Primary anterior teeth requiring extensive restorative therapy due to caries, trauma or developmental defects can present a particularly challenging problem for the pediatric dentist. The ideal restorative technique would combine strength, durability, esthetics and efficiency in placement. Couple these concerns with the technical difficulties of operating on children with behavior management problems, and the dentist is left with the difficult tack of choosing from a variety of restorative options. Restorative modalities currently in use to treat primary anterior teeth include bonding with composite resin as in celluloid strip crowns, conventional stainless steel crowns, open-faced stainless steel crowns, commercially and chairside veneered stainless steel crowns and epoxy-coated stainless steel crowns. Each of these techniques presents technical, functional or esthetic compromises that complicate their efficient and effective usage. This is a report of the results obtained at the Department of Pediatric Dentistry. College of Dentistry, Seoul National University, through the use of these various methods of treating primary anterior teeth.

인터넷을 통한 동기화 된 캡션 및 동영상 데이터베이스에 관한 설계 및 구현

홍동권,박기현,신승봉 계명대학교 산업기술연구소 1998 産業技術硏究所 論文報告集 Vol.21 No.1

Current information society requires effective ways to process multimedia data like image, audio, video and so on, Many public of private information providers gather, store multimedia information and supply a different kind of multimedia data to users in everywhere. Most of users nowadays access multimedia data via internet. Audio and video data are usually transmitted to users by using streaming technology for instant replay. In this paper, we investigate database design techniques for effective retrieval of video segment and replay method of retrieved videos, Especially we shows the design and implementation technique for closed captioning of streaming file.

(±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b,d] pyran-9(8H)-one의 염소화 반응에 관한 연구

홍기운,육찬남,백승화 圓光大學校 1991 論文集 Vol.25 No.2

(±)-6a, Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b,d] pyran-9[8H]-one의 염소화 반응은 metal halide와 함께 18-crown-6존재하에m-chloroperbenzoic acid에 의해 산화반응이 일어났다. 이 반응계에서는 염소화 반응이 방향족 고리에만 선택적으로 일어났다. (±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b, d]pyran-9(8H)-one has been chlorinated in the aromatic ring with metal halide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. This reagent system effects the regiospecific chlorination of activated aromatic ring over olefinic double bond.

폐수슬러지를 혼입한 콘크리트의 재료특성 및 강도특성

홍기호,하상훈,김정규,어석홍 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-

The purpose of this study is to investigate the material characteristics and strength properties of concrete mixed with wastewater sludge, and to evaluate the leaching of environmentally harmful heavy metals from the wastewater sludge itself and from hardened concrete mixed with wastewater sludge. For this purpose, a reference mix with W/C ratio of 0.45 was used and the replacement proportion of wastewater sludge was varied with ratios of 0, 30, 50, 70 and 100% by volume of coarse aggregate in the reference mix. The variations of compressive and splitting tensile strength, workability and unit weight of concrete were considered. Test results showed that the strengths and unit weight decreased with increase in proportion of wastewater sludge replaced, but workability increased. Leaching test results showed that there would be no environmentally harmful problem from using wastewater as substitutes of coarse aggregates in concrete.

경화방법에 따른 아크릴 레진 표면의 물리적 성질에 관한 연구

홍순호,이기대 慶北大學校 齒科大學 1987 慶北齒大論文集 Vol.4 No.1

Two principal techniques have been used in relining dentures: the direct intraoral application of acrylic resin and the indirect method which use heat cured acrylic resin. In this study, to observe the physical properties of acrylic resin surfaces by curing procedure in indirect methods which used heat cured acrylic resin and self cured ??erylic resin. The results were as follows: 1. In two types of resin, the surface hardness of heat cured specimen higher than self cured specimen. 2. In two of resin, there was difference in the surface roughness. 3. In two types of resin, the surface porosity of self cured specimen more larger and number than heat cured specimen.

T.S. Eliot와 형이상시의 부활

홍기종 釜山大學校 1989 人文論叢 Vol.34 No.1

소아에서 발생한 골수이형성 증후군 2례

홍성진,윤석중,김성우,조형구,오명호,김기혁,이인성 건국대학교 의과학연구소 1996 건국의과학학술지 Vol.5 No.-

Myelodysplastic syndrome(MDS) is a group of acquired conditions characterized by progressive bone marrow failure associated with normocellular or hypercellular bone marrow that cannot be attributed to nutritional deficiency, chronic infection, or other chronic systemic illness, and cannot be reversed by the successful treatment of those conditions. Whereas the cases of secondary MDS occur at all ages, primary MDS is essentially a disease of elderly, though no age group is exempt and predomonant in men. The MDS is fundamentally clonal disorders at the level of the haemopoietic totipotent stem cell. Clinically, they are characterized by varing degrees of peripheral cytopenia(s) with morphological and functional abnormalities of blood elements. We have experienced two unrelated pediatric cases, who showed pancytopenia on admission and the characteristic marrow findings of MDS. The first case, a 12 months-old girl, showed increased reticulin with abnormal localization of immature precursor cells(ALIP) in her bone marrow, in addition to dysplastic features such as bi-and multi-nucleation of late normoblasts and internuclear bridging. She also showed 22% of blasts in her bone marrow cells thus classified in the category of RAEB-t after FAB classification. Also found were a chromosomal abnormality namely 46 XX t(14q21q), which was an unusual one. Her family brought her home and, 4 month later, she deceased. The second case, a 12 year-old boy, showed pancytopenia with Pseudo-Pelger-Huet anomaly in neutrophils but no blasts in the peripheral blood. Bone marrow of this case also showed the picture of dyserythropoiesis with binuclearity, internuclear bridging, nuclear fragments, multinuclearity of late normoblasts, in addition to megaloblastoid change in the normoblasts and increased mitosis in granulocytic series. No chromosomal abnormality was found. Classified as RA after FAB classification of MDS. Showed good response to conservative management for anemia for more than one year.

인삼이 말초신경 장애성 통증에 미치는 영향과 그 기전에 관한 연구

홍기완,김광진 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

The aim of the present study was to investigate the antinociceptive effects of ginseng extracts on neuropathic pain evoked by peripheral nerve injury in rats, according to the method of Bennett and Xie. Chronic constrictive nerve injury to sciatic evoked markedly allodynia, which was determined by withdrawal time and ratio to the innocuous mechanical, chemical and cold stimuli (5oC) applied to the hind paw. Total saponons of ginseng extract(100mg/kg) inhibited allodynia to the stimuli applied but higher dose of saponins had no effect. Among the saponin extract, protopanaxadiol saponins(PT) was found to be the effective component for the antinociceptive action of ginseng extracts on neuropathic pain. On the other hand the prototopanaxatriol saponins (PD) had no effect on neuropathic pain. MK-801(1.6mg/kg) and IA-966(0.1mM/kg) enhanced the antinociceptive effect of PT on chemical and cold allodynia. MK-801 and HA-966 enhanced, transiently, the effect of PT on chemical and cold allodynia. Apomorphine(4mg/kg) inhibited all the mechanical, chemical, and cold allodynias in the neuropathic animal that was reversed by the first day of PT administration, but returned to the inhibited state on the second day of PT administration. Serotonin(60mg/kg) enhanced transiently the antinociceptive effect of PT on allodynia to mechanical and chemical stimuli, but showed prolonged effect on the allodynia to cold stimuli. PT enhanced transiently the antinociceptive effects of the TEA(10mM) on allodynia to mechanical and chemical stimuli, but the enhanced effect on cold allodynia was maintained. From these results it is concluded that total saponin extracts of ginseng has antinociceptive effects on the allodynia to mechanical, chemical and cold stimuli in the neuropathic pain animal, and among the ginseng extract PT is the effective component, and that the mechanism of the antinociceptive effects of PT is not simple.