랑방 복합 스포츠 문화센터

E+E,Leth&Gori 현대건축사 2014 월간 CONCEPT Vol.- No.180

副生廢石膏 活用에 대한 基礎的 硏究

권이열 漢陽大學校 環境科學硏究所 1984 環境科學論文集 Vol.5 No.-

본 연구는 국내 비료공장에서 배출되는 인산부생생석고를 대상으로 하여 이를 활용하기 위한 기초적 연구이며 산업폐기물 활용에 관한 연구의 일환이다. 현재 국내에서 도자기용 형재로 사용하고 있는 수입석고를 위의 부생폐석고로 대체가능한가를 조사하고저 이에 대한 기초적 물성과 화학조성을 비교하며 불순성분들이 석고의 품질에 미치는 영향을 고찰하고 또한 수입품과 국내 부생폐석고의 형재로서의 성능을 검토하여 다음과 같은 결론을 얻었다. 1. β형 반수석고에 주요불순성분인 CaHPO₄·2H₂O, Al₂O₃, SiO₂가 단미로 혼입될 경우 (a) 응결시간에 미치는 영향: 일반적으로 완만히 짧아지고 CaHPO₄·2H₂O의 영향이 가장 현저하였다. (b) 습인장강도에 미치는 영향: 일반적으로 습인장강도는 약화되며 Al₂O₃, SiO₂의 영향이 큰 반면 CaHPO₄.2H₂O의영향이 적었다. 2. 불순성분 2성분이 복합되어 혼입될 경우 (a) 응결시간에 미치는 영향: Al₂O₃-CaHPO.2H₂O계에서는 양성분쪽으로 치우칠 때 응결시간은 길어지며, Al₂O₃-SiO₂계와 CaHPO₄·2H₂O-Al₂O₃계에서는 Sio₂의 함율이 높을수록 길어지는 경향이 있었다. (b) 습인장도에 미치는 영향: Al₂O₃-CaHPO₄.2H₂O계와 SiO₂-CaHPO4.2H₂O계에서는 CaHPO₄·2H₂O함율이 높을수록 Al₂O₃-SiO₂계에서는 SiO₂의 함율이 높을수록 습인장도는 약화되는 경향이 있었다. 3. 불순성분이 3중혼입될 경우 (a) 응결시간에 미치는 영향: SiO₂의 함율 및 Al₂O₃의 함율이 높을수록 CaHPO₄·2H₂O함율이같은 경우 SiO₂함율이 CaHPO₄. 2H₂O의 함율보다 높을수록 응결시간은 길어지는 경향이 있었다. (b) 습인장강도에 미치는 영향: CaHPO₄·2H₂O의 함율이 높을수록 CaHPO₄·2H₂O의 함율이 같을 때는 Al₂O₃의 함율이 SiO₂함율보다 높을수록 인장강도는 떨어지는 경향이 있었다. 4. 부성폐석고를 하소하여 만든 β형 석고를 70% 이내로 혼합할 경우 도자기 형제용 석고의 한국공업규격에 적합한 함율임을 알 수 있었다. A study for utilization of waste gypsum occurring as by-products from the domestic fertilizer industry was carried out. In order to ascertain the possibility of substitution of imported gypsum by waste gypsum in the practical use, some physical and chemical properties of waste gypsum were investigated. The following results were obtained from this study: 1. When β-gypsum hemihydrate was adulterated by major impurities such as CaHPO₄·2H₂O, Al₂O₃ and SiO₂: (a) Setting time of the gypsum was gradually reduced. (b) Wet-tensile strength of the gypsum was decreased by these impurities. Al2o3 and SiO2 were more effect than CaHPO₄·2H₂O on the strength 2. When binary-component were adulterated by β-gypsum: (a) Setting time of the gypsum was increased by Al₂0₃-CaHPO₄·2H₂O especially when the amount of either component of this binary system is predominate over the other. For both Al₂0₃-SiO₂ and CaHPO₄-Al₂O₃ systems the coagulation time was increased with the content of SiO₂ (b) Wet-tensile strength of the gypsum was decreased with the content of SiO₂ in Al₂0₃-SiO₂ system and with the content of SiO₂ in both Al₂0₃-CaHPO₄·2H₂O and SiO₂-CaHPO₄·2H₂O systems. 3. When triple-components were adulterated in β-gypsum: (a) Setting time of the gypsum was increased with decrease of the content of SiO₂ meanwhile decreased with the content of Al₂0₃. When the content ratio of CaHPO₄·2H₂O was the same, the setting time was increased in case of the content of SiO₂ was larger than that of CaHPO₄·2H₂O. (b) Wet-tensile strength of the gypsum was decreased proportionally with the amount of CaHPO₄·2H₂O. When the content ratio of CaHPO₄·2H₂O was the same, the tensile strength was decreased in case of the amount of Al₂0₃ was predominant over that of SiO₂. 4. When 70% of β-gypsum obtained by calcination If waste gypsum was adulterated in β-gypsum hemihydrate, a good pottery moldin material which fits to the korean industrial standard was obtained.

형광분석법을 이용한 혈청중 알루미늄 분석

권이열 漢陽大學校環境科學硏究所 1987 環境科學論文集 Vol.8 No.-

혈청중의 알루미늄 함량을 lumogallion을 이용하여 형광분석법으로 분석하였다. 형광측정조건으로 여기파장과 형광파장을 선정하였도 pH와 형광강도와의 관계, 혈청중에 존재하는 철 및 구리이온의 영향, isoamyl alcohol로 용매추출했을 때의 영향등을 검토하였다. 알루미늄 complex의 형광강도는 pH가 5일때에 최대를 나타내었다. 혈청중의 알루미늄 함량 분석에서 철 및 구리이온의 방해는 hydroxylamine hydrochloride와 o-phenanthroline용액을 가하고 isoamyl alcohol로 추출함으로서 막을 수 있었다. The amounts of aluminum in serum were determined by the fluorometric method. Lumogallion was used as a fluorescent reagent. The excitation and the emission spectra of the aluminum complex, the effect of pH on fluorescence intensity, the interference of ?? and ??ion in serum, and the effect of isoamyl alcohol extraction were investigated. The maximum fluorescence intensity of the aluminum complex was found at pH 5. The interference of ?? and ??ion in the determination of aluminum was prevented when sample solution treated with hydroxylamine hydrochloride and o-phenanthroline solution was extracted with isoamyl alcohol.

수용액에서 시멘트를 이용한 중금속이온의 처리

권이열 韓陽大學校 環境科學硏究所 1986 環境科學論文集 Vol.7 No.-

수용액에서 중금속을 제거할 목적으로 보통시멘트와 스래그시멘트로 수용액을 처리 하였다. 구리, 납, 아연 양이온의 0.05M 수용액을 시멘트 0.25∼4%로 상온에서 대략 4시간까지 처리한 결과는 다음과 같다. 수용액 중이 금속이온은 90% 정도 제거할 수 있다. 보통 시멘트가 스래그시멘트 보다 효과적이다. 흡착되는 속도는 구리, 납, 아연 순이다. An aqueous solution containing heavy metal ions is treated with the portland cement andslag cement separately to remove the these ions. 0.05M aqueous solutions of each of Cu²+, Pb²+, and Zn²+ are treated with 0.25∼4% of cements at room temperature for approximately four hours. The result shows that the portland cement is superior to the slag cement in terms of adsorptivity to remove 90% of the heavy metal ions. The adsorption rate increases in the order of Cu²+, Pb²+, and Zn²+.

노래미, Agrammus agrammus (Temminck et Schlegel)의 性成熟에 따른 GTH 細胞의 活性에 關한 硏究

鄭義泳,李澤烈 釜山水産大學校 1985 釜山水産大學 硏究報告 Vol.25 No.2

1981年 7月부터 1984年 8月까지 釜山市 海雲臺 동백섬의 조간대에서 채집된 노래미, Agrammus agrammus를 對象으로 性成熟에 따른 腦下垂體의 gonadotroph(GTH 細胞)들의 活性變化를 光學 및 電子顯微鏡的 方法에 의해 調査하였다. 生殖巢 生長 成熟에 따라 腦下垂體의 GTH細胞의 活性과 分布面積이 擴大되고 있으나 일단 完熟된 後 排卵前의 個體들은 GTH 細胞들의 活性이 점차로 減少되고 그 分布 面積이 줄어든다. GTH 細胞의 細胞質內에는 電顯像에서 직경이 100∼300nm이고 높은 電子密度를 가지는 多數의 작은 分泌顆粒들과 직경이 800∼1000nm이며 낮은 電子密度를 가지는 小數의 큰 分泌球의 2種類가 관찰되었는데, 이 中 작은 分泌顆粒들이 成熟과 産卵에 관여하는 것으로 보인다. The activity of gonadotrophs (GTH cell) of greenling, Agrammus agrammus, was histologically investigated under photo and electron microscopy. The materials were monthly collected at the coastal area of Tongbaeksom, Pusan, Korea, Since July 1981 to August 1984. Gonadotrophs were activated during the growing period, and their activities decreased at the spawning season with a peak for the mature period. Two kinds of secretory granules in the gonadotrophs were detected by the electron microscope, i. e. many small granules with high electron-density were related to both maturation and ovulation or spermiation ranging from 100-300nm in diameter, and a few large globules with low electron-density from 800-1000nm.

하천수중 유분의 박층크로마토그라피에 의한 분리 및 비색정량

권이열 漢陽大學校環境科學硏究所 1987 環境科學論文集 Vol.8 No.-

하천수의 n-Hexane 추출물질중에 함유하는 광물성유과 동식물석유를 Thin Layer Chromatography에 의해 분리 정량하는 방법에 대하여 고찰하였다. 추출된 Hexane액의 일부를 CHC1₃에 용액시키고 Thin Layer Chromatography에 수포화된 CHC1₃용액을 써서 전개 한 다음 Anisaldehyde 시약으로 발색시키면 광물성유는 Rf=0.70~0.77, 동식물성유는 Rf=0.50~0.58로서 분리되었다. 고급지방산 등의 극성이 높은 유기물질을 중크롬산칼륨-황산은 혼합수용액과 가열시켜 유분을 산화하고, 이때 생성된 Cr(Ⅲ)의 흡광도를 측정함에 따라 각각의 유분의 양을 거의 정량적으로 구할 수 있었다. 그리고 이러한 방법을 실제 하천수 시료에 적용시켜 보았다. Separation and identification of mineral oils and glycerides in hexane extracts from river water were studied by thin layer chromatography(TLC). First, various minetal oils, glycerides animal and vegetable oils and fatty acids were examined as reference materials on silica gel TLC plates by using water saturated chloroform as solvent. The amount of each component was deternined by first treated the spots with a mixture of H₂SO₄, K₂Cr₂??, and Ag₂SO₄and then measuring the optical absorption of Cr(Ⅲ) species formed. By this procedure, trace oils as little as 0.017 meq.(oxidation equivalent by K₂Cr₂SO₄)were determined. The present method was applied to classify various dispersed oils in river water.

온수 추출특성에 관한 실험적 연구

박이동,장영근 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1

A lot of research on energy storage process has been performed but few extraction process has been studied. In this study, extraction process of hot water stored in a hot water storage tank was analyzed according to dynamic and geometric parameters dominating the hot water withdrawal process. For this study, the experiments of hot water extraction were carried out by changing withdrawal rates of hot water ranged from 4LPM to 8LPM (Q=4, 6, 8LPM) and by changing temperature differences between hot water initially stored in a storage tank and cold water inflowed to a storage tank ranged from 10℃ to 30℃ (△T=10, 20, 30℃). And also, single round port, perforated distributor (Aspect Ratio=2) and modified distributor (Aspect Ratio=2. 5) were used as a inlet and outlet shapes. The purpose of this investigation was to experimentally determine what outlet conditions are favorable to enhance hot water extraction efficiency during the hot water withdrawal process. As a results, during the hot water extraction, as the extraction rate of hot water decreased, at the same time the temperature difference between cold water inflowed to the storage tank and hot water initially stored in the storage tank increased and modified distributor I(MDI) was used outlet shape, thermocline appeared at the lower region of the storage tank, extraction efficiency of hot water increased.

한국 賃金勞動者層 내부구성의 변화

정이환 서울産業大學校 1994 논문집 Vol.40 No.1

Korea has a quite militant labor movement and arm's length labor-management relations. One of the factors of this labor militancy is the internal composition of the working class. A large part of the Korean working class have been production workers employed in large establishments, and they've been quite homogeneous internally. They had many features characterizing traditional 'proletariat'. However, the internal composition of the Korea working class is changing these days. First of all, the percentage of the production workers out of the whole working class is getting smaller. Even the number of production workers itself if decreasing. Instead if it, the portion of the white collar workers is increasing. Secondly, the temporary workers who are called the 'peripheral working strata' are increasing. They are subsituting permanant workers. Thirdly, the percentage of the workers employed in large establishments is decreasing, while that of the workers of small establishments are increasing. In sum, we can say that the integrity of traditional working class is beginning to be disintegrated from the end of the 1980's in Korea. These changes are expected to be the factors which will weaken the militancy of Korean labor movement. These changes, nevertheless, are slow, and their effects on labor movement and industrial relations shouldn't be exaggerated.

急傾斜 開水路上을 물이 流動할 때 粘性力과 重力의 效果

朴伊東 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.2

Experiment results showed that film water flow(arount 0. 5mm of film thickness) on steep open channel (made of a normal glass with 160cm of the length) was affected by mainly gravity force rather than viscosity force. Characteristics of the gravity force affecting to the film water flow depended upon the flow rate of water, namely strong gravity force affected to the flow for a big flow rate than for a little flow rate. Very large deviation of the effect between a big and a little flow rate took place at entrance of the channel. Specialy, for the maximum flow rate(10 GPM) the most effect at the entrance decreased rapidly at early stage. Contrarily, for the minimum flow rate (0.25GPM) the effect at the entrance rather increased a little at early stage comparatively. Generally, the effects of gravity force kept almost constantly for all flow rate from mid point of the channel (about 80cm from the entrance of channel).

多空質層內의 流體流動의 Diffusivity Equation의 誘導

朴伊東,吳炳旭 成均館大學校 1980 論文集 Vol.28 No.-

Science of underground water or oil reservoir is rather a global concept. One of the basic tool or elements are basic equation of flow in the underground. Flow through porous media has the viewpoint of using known or presumed knowledge of the reservoir material(media), the fluid (or fluids) present in the media, and the operating conditions of the system to descirbe mathematically the expected behavior of the reservoir system. The mathematical description could then be used to predict the behavior of the system. For effective production behavior, reservoir engineers are interested in all of these processes as they occur in porous media. In this study, as the first step derivation of diffusivity equation for slightly compressible fluid flow in the porous media was confined for linear horizontal flow system. Diffusivity equation (flow equation) was confined for linear horizontal flow system. Diffusivity equation (flow equation) was derived by combining three basic physical laws such as law of consercation of mass, darcy's law and equation of state which the fluid had to obey. As a result for derivation of diffusivity equation, ∂^2 p/∂x^2=øμc/k·∂p/∂t was obtained.