• 보건세계
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• v.45 no.3 s.499
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• pp.4-7
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• 1998

지난 1997년은 결핵관리부분에도 많은 어려움이 있었던 해였다. 특히 국가결핵관리사업의 핵심사항인 영유아 결핵예방접종에 있어 민간의 병$\cdot$의원 경피 비시지 사용이 늘어 결핵예방사업에 지장을 주었고 결핵진단용약(PPD)의 공급차질 그리고 교육부와 학생 검진문제에 대한 의견상충 등으로 결핵관리사업편람을 재검토하는 계기가 되었다. 그러한 중에도 현재 마지막 정리단계에 있는 '2000년대 국가결핵관리 발전방안 모색을 위한 작업반'의 활동결과는 지난 1년간 각계의 전문가들이 여러차례의 진지한 토의를 거쳐 얻은 귀중한 결실이었다. 동 활동내용은 민간 병$\cdot$의원과 함께 결핵의 현실을 정확하게 재조명하고 해결방안을 찾고자 하는데 의미가 컸다고 할 수 있으며 우리나라의 중$\cdot$장기 결핵관리사업 계획수립에 기초가 되어 결핵의 조기퇴치에 크게 기여할 것이라고 확신한다. 1998년은 그 작업결과를 바탕으로 단기적으로 그동안 해결하지 못했던 문제점의 해결에 최선을 다하여 국가결핵관리의 체계를 재정립하고 장기적으로는 다가오는 2000년대에 대비하여 보다 발전된 국가결핵관리 사업의 초석을 다지고자 한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1996.11a
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• pp.218-220
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• 1996

A composite films were prepared by using Polyphenylenediamine(PPD) synthesized in our lab. and crystalline V$_2$O$_{5}$ in various mixture ratio for using positive active material of polymer film battery. The thermal stability of prepared composite film was carried out by using TGA. Electrical conductivity of composite film were also measured by using four-probe method in dry box. The thermal stability of prepared composite film is more than 35$0^{\circ}C$. The electrical conductivity of composite film increased and showed the highest value(about 23 S/cm) when doped at 0.4% LiCiO$_4$solution.n.

• Journal of the Korean housing association
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• v.15 no.1
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• pp.25-32
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• 2004

The purpose of this study is to understand the indoor thermal environment in the earth brick wall building what is called a ecological Architecture. To investigate thermal performances of the earth brick walls, it measured indoor and outdoor air temperature, relative humidity, globe temperature and PMV in reference house. The result of this study were summarized as the followings; 1) When the outdoor average air temperature was $21.8^{\circ}$, livingroom was $24.9^{\circ}$, kitchen was $25.1^{\circ}$ and 2nd floor room was $25.6^{\circ}$ at 150 cm height from the floor. 2) Although the average outdoor relative humidity was 78%, the livingroom was 67.5%. 3) As the air temperature difference between at the top and bottom was $0.6^{\circ}$ in living room, this value was below 1 % of PPD by ASHRAE Handbook. 4) Predicted Mean Vote(PMV) by ISO-7730 was +0.41.

• Journal of the Ergonomics Society of Korea
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• v.15 no.1
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• pp.91-103
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• 1996

For determining thermal comfort properties of work suit in an atomic power plant, three different coverall ensembles (PVE, PET/Rayon, PP Nonwoven) were selected and the resistance to dry and evaporative heat transfer were measured for each ensemble by using a sweating thermal manikin. Also, PMV (Predicted Mean Vote) and PPD(Predicted Percentage of Dissatisfied) indices were predicted according to ISO 7730. As a result, ideal environmental conditions in an atomic power plant were suggested to make workers feel thermally comfortable. In addition, ideal intrinsic insulation values of coverall ensembles as a work suit under the present environmental conditions in the at6omic power plant were provided. The information given in this paper can be used to control environmental conditions in the atomic power plant thermally comfortable and to select a proper work suit for providing thermal comfort to the workers.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.6
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• pp.581-588
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• 2000

This paper describes the effect of vertical air circulation on the thermal environment in an airport passenger terminal with induced flow by jet fans. In comparing the level of thermal comfort at the breathing line of 1.5 m in height, the results from the two models with or without the vertical air circulation, show that the average PPD is 8% in the former and 23% in the latter, respectively. It is thought that vertical air circulation lends to improved thermal comfort for human in respect of ventilation in a large space.

• Bulletin of the Korean Chemical Society
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• v.16 no.5
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• pp.392-397
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• 1995

o-Phenylenediamine (o-PD) was electropolymerized on glassy carbon electrodes under a potential cycling condition. The resulting polymer films mediated electrons for the reduction of molecular oxygen at pH=1.0. It was found from the RDE, RRDE, and cyclic voltammetry experiments that the modified electrodes reduce oxygen to hydrogen peroxide at about 300 mV lower potential than the bare glassy carbon electrode. The polymer film consisted of more than two components. Among those, only one component was active in oxygen reduction, which was formed mainly in the earlier stage of the electropolymerization. 2,3-Diaminophenazine, a cyclic dimer of o-PD, was also active in the oxygen reduction reaction, from which it was suggested that the active polymeric component has a structural unit similar to the cyclic dimer. Finally, the electropolymerization mechanism for the formation of the active and inactive components has been proposed.

• Journal of the Korean Society for Precision Engineering
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• v.12 no.12
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• pp.130-138
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• 1995

Machined graphite/epoxy surfaces were studied by using SEM (Scanning Electron Microscopy), surface profilometry and its analysis to determine suitable surface describing parameters for machined unidirectional and multidirectional laminate composite. The surface roughness and profile are found to be highly depdndent on the fiber layup direction and the measurement direction. It was possible to machine 90 .deg. and -45 .deg. plies due to the adjacent plies, which were holding those plies. It was found that the microgeometrical variations in terms of roughness parameters $R_{a}$ without $D_{y}$(Maximum Damage Depth) region and $D_{y}$are better descriptors of the machined laminate composite surface than commonly used roughness parameters $R_{a}$and $R_{max}$ The characteristics of surface profiles in laminate composite are well represented in CPD (Cumulative Probability Distribution) plot and PPD (Percentage Probability Density) plot. Edge-trimmed multidirectional laminate surfaces are Gaussian and random for profiles measured along the tool movement direction, they are periodic and non-Gaussian in the direction perpendicular to the tool movement.t.ent.t.

• Journal of Ginseng Research
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• v.10 no.1
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• pp.11-20
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• 1986

The potential effects of ginseng saponin on the growth, aflatoxin production, and physicochemical characteristics of Aspergillus parasiticus R-716 were investigated and the results obtained were summarized as follows. The pH values of culture filtrate were increased with an increase of addition amount of saponins, the amount of mycelium was increased up to l19% by the addition of 0.01% protopanaxatriol saponin (triol). Amount of aflatoxin was increased in proportion as the bright yellow color of chloroform extract of culture filtrate was intensified. There was no difference in sporulation by the addition of 0.02% saponins, however, the sporulation was gradually decreased as the addition concentration of saponins increased. Aflatoxin production was reduced to the level of 8% by the addition of crude saponin, but production of aflatoxin B1 and B2 were inhibited by 56% and 8% with the addition of 0.5% pure saponin. The production of aflatoxin B. was increased by the addition of 0.5% trios saponin, and by the addition of 0.02% biol saponin, aflatoxin G, production reached to the maximum and thereafter it was decreased.

• The Journal of Internal Korean Medicine
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• v.25 no.1
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• pp.16-27
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• 2004

In the traditional Chinese medicine, Drynariae Rhizoma (DR) has been reported as a good enhancer for bone healing. DR, a plant widely used in the traditional medicinal systems of Korea, has been reported to possess antiviral, antibacterial and anti-inflammatory activities. Modulation of immune response to alleviate disease has been of interest for a long time. Plant extracts have been widely investigated for possible immunomodulatory properties. Thus, I have evaluated the anticellular and immunomodulatory properties of ethanolic extract of DR. DR extract inhibited proliferation of mitogen (phytohaemagglutinin; PHA) and antigen (purified protein derivative; PPD)-stimulated human peripheral blood mononuclear cells (PBMCs). In addition, DR inhibited growth of several cell lines of mouse and human origin. It also inhibited production of nitric oxide (NO), interleukin-2 (IL-2) and tumor necrosis $factor-{\alpha}\;(TNF-{\alpha})$. Intracytoplasmic $interferon-{\gamma}\;(IFN-{\gamma})$ and expression of cell surface markers, CD16 and HLA-DR, on human PBMC, were not affected on treatment with DR but CD25 expression was down regulated. This study demonstrates the antiproliferative and immunosuppressive potential of ethanolic extract of DR in vitro.

• Journal of Food Hygiene and Safety
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• v.16 no.3
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• pp.200-205
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• 2001

In this study, occurrence of aflatoxin M$_1$(AEM$_1$) in domestic milk and milk products was determined. The level of AFM$_1$ in market milk (0.047 ppb) was lower than that in raw milk (0.083 pub) but this looks like that is due to dilution in collecting process rather than the effect of sterilization. In the case of nonfat dry milk, level of AFM$_1$appeared high by 0.24 ppb but it is thought to be not different from market milk actually because nonfat dry milk is diluted at intake. In the case of ice cream, finished products were contaminated with AFM$_1$of 0.020 ppd and also have the possibility of the contamination of AFB$_1$due to secondary raw material such as nuts and almond. On the basis of the results of this study and previous studies, Monte-Carlo simulation is conducted to estimate the contamination level of AFM$_1$in domestic market milk. To consider uncertainty and variability fitting procedure was passed through. And we used beta distribution to estimate the prevalence and triangular distribution to estimate the concentration level of AFM$_1$in milk. As a result, the 5%, 50% and 95% points of the distribution of the probability of AFM$_1$contamination level in milk is 0.0214, 0.0946 and 0.1888 ppb, respectively. Also we estimate that AFM$_1$in almost milk was low more than 0.5 ppb that is American acceptable level but 80.4% exceeded far 0.05 ppb that is European standard.