• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2005년도 추계학술발표논문집
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• pp.293-299
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• 2005

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2005년도 춘계학술발표논문집
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• pp.48-54
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• 2005

• 분석과학
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• 제12권5호
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• pp.415-420
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• 1999

칼라필터의 Black Matrix (BM)의 표면에 발생하는 잔사의 양을 Atomic Force Microscopy (AFM) 측정 결과에 의해 얻어진 히스토그램을 사용하여 정량화하였다. 히스토그램을 free BM 표면(1)과 잔사(2)에 해당하는 두 개의 Gaussian 함수로 분리하고 각 분포의 면적($a_1$, $a_2$)을 계산하여, 잔사가 차지하는 면적비($a_2/(a_1+a_2)$)를 계산하였다. 또한, free BM 표면에 대한 Gaussian 함수로부터 free BM 표면내에 또 다른 잔사가 존재하고 있음을 알 수 있었다. 이것의 경우에는 잔사의 양을 정확하게 수치적으로 정량화는 할 수 없지만, 분포의 평균값과 표준 편차로부터 정성적인 결과를 얻을 수 있다.

• 상하수도학회지
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• 제24권5호
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• pp.527-536
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• 2010

Although the bubble-floc agglomerate floated and formed the float layer on the surface of the water in the DAF process, after inducing in the thickening tank a part of the bubble-floc agglomerate come up again to the surface and the other is settled at the bottom of the tank. The bubble-floc agglomerate divided into two group as the scum on the surface and the sludge of the bottom gives rise to operational troubles for the thickening process. In order to find out the cause of break-up and the effective thickening method for sludge from the DAF process, the composition of the bubble-floc agglomerate was investigated and a series of flotation experiments carried out. There was no difference of composition between the scum on the surface and the sludge of the bottom in the thickening tank. The coagulation was not effective to improve the trouble that the bubble-floc agglomerate divided into the scum and the sludge. It was estimated that for the bubble-floc agglomerate of thickening tank the trouble was caused by not the change or the difference of chemical composition but whether the bubble-floc agglomerate hold bubbles. Furthermore, for the effective thickening of sludge from the DAF process, it is required an additional flotation applied the AS ratio depending upon the solid concentration of sludge as the operation parameter.

• Applied Biological Chemistry
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• 제46권1호
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• pp.28-31
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• 2003

Soybean phytosterols는 혈중 콜레스테롤 수치를 낮추는 효과를 지닌 것으로 알려져 있다. 이를 이용한 기능성 마요네즈 제조를 위하며 대두 scum으로부터 soybean phytosterols를 분리한 후 여러 농도로 마요네즈에 첨가하였다. Soybean Phytosterols 첨가가 마요네즈의 품질에 미치는 영향을 살펴보기 위하여 용해성, 점도, 유화안정성, 관능평가를 통하여 soybean phytosterol의 마요네즈 적정 첨가량을 조사하였다. 마요네즈 제조시 가장 바람직한 soybean phytosterol의 첨가량은 용해성, 점도, 유화 안정성과 관능평가에서 0.5% 첨가가 가장 바람직한 것으로 평가되었다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.943-944
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• 2008

In this paper, image processing technologies was employed to monitor and visualize the conditions of the inside of furnace for glass. In order to capture the images of the furnace under the high temperature environment, specially designed camera system was used. From the experimental results we see that the developed software showed good information about the inside conditions such as a scum line and positions of bubbles.

• 상하수도학회지
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• 제30권2호
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• pp.187-196
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• 2016

In this study, a newly developed agitator with hydrofoil impeller applied to actual biological process in advanced wastewater treatment plant was evaluated. Several series of experiments were conducted in two different wastewater treatment plants where actual problems have been occurred such as the production of scums and sludge settling. For more effective evaluation, computational fluid dynamics (CFD) and measurements of MLSS (Mixed Liquor Suspended Solids) and DO (Dissolved Oxygen) were used with other measuring equipments. After the installation of one unit of vertical hydrofoil agitator in plant A, scum and sludge settling problems were solved and more than seventy percent of operational energy was saved. In case of plant B, there were three cells of each anoxic and anaerobic tanks, and each cell had one unit of submersible horizontal agitator. After the integration of three cells to one cell in each tank, and installation of one vertical hydrofoil agitator per tank, all the problems caused by improper mixing were solved and more than eighty percent of operational energy was found to be saved. Simple change of agitator applied to biological process in wastewater treatment plant was proved to be essential to eliminate scum and sludge settling problems and to save input energy.

• Asian-Australasian Journal of Animal Sciences
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• 제13권11호
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• pp.1593-1597
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• 2000

In the quiescent state, cattle-manure slurry stratifies into three discernible layers, namely a floating scum layer, a bottom sludge layer and a watery middle layer. The proportions of top (scum), middle and bottom (sludge) layers were approximately 20, 60 and 20% respectively of the volume of the whole slurry. Particulate matter from the different stratified layers was characterised for particle size distribution and cellulose, hemicellulose and lignin composition. Total solids concentrations of top, middle and bottom layers were 12.7, 2.8 and 7.4% respectively. Larger particles were found in the top layer compared with the bottom. The top layer contained the highest amounts of Neutral Detergent Fibre (NDF), Acid Detergent Fibre (ADF), cellulose and hemicellulose, but the lowest amount of Total Kjeldahl Nitrogen (TKN). The bottom layer contained the highest amounts of Acid Detergent Lignin (ADL) and TKN. With increase in particle size, there were increases in NDF, ADF, cellulose and hemicellulose, accompanied by decreases in ADL and TKN. Biochemical methane potential of the three layers was also measured. The top layer was found to produce the most methane with the middle layer producing the least. Biomethanation rate from the top layer was also the highest. Differences in biomethanation rates and biochemical methane potential were attributed to differences in chemical composition of the particulate matter. About 48%, 23% and 30% of the total chemical oxygen demand (COD) in the top, middle and bottom layers respectively of the slurry was found to be degradable.

• 한국자기학회지
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• 제3권3호
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• pp.241-246
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• 1993

본 연구에서는 습식법에 의해 얻어진 초미립 마그네타이트 표면에 포화지방산이온($C_{9}~C_{18}$)을 화학흡착시키고, 그 위에 SDBS로서 물리흡착층을 형성시켜 수상자성유체를 제조하였다. 마그네타이트 27 g에 대해서 Lauric acid의 첨가량 $2.66{\times}10^{-2}mol$ 이상, SDBS 첨가량 5g 이상에서 수상자성유체의 분산율이 85% 이상 유지되었다. 고체함량이 0.05 g/cc에서 0.4 g/cc로 증가함에 따라 수상자성유체의 자화값은 2.07 eum/g에서 9.31 eum/g으로 증가하였으며, 점도는 1.20 cp에서 3.95 cp로 증가하였다. 1N-HCI 및 1N-NaOH를 사용하여 수상자성유체의 pH 변화에 따른 분산특성을 조사한 결과 pH 3.1~11.1의 영역에서 안정한 분산특성을 나타내었다. 합성마그네타이트 주위에 포화지방산($C_{9}~C_{18}$)을 제1계면활성제로 사용하여 수상자성유체를 제조한 결과, 탄소길이가 증가함에 따라 분산율은 향상되었으나 다량의 scum이 발생하였다.

• 한국식생활문화학회지
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• 제19권4호
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• pp.429-434
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• 2004

대두 탈취부산물(scum)로부터 분리 정제한 식물성스테롤 처리 식이를 휜쥐에게 4주간 공급하며 혈장지질, 포도당 농도 및 혈장, 췌장, 근육조직의 인슐린 함량에 미치는 영향을 조사하였다. 대두 탈취부산물로부터 분리 정제한 식물성스테롤 성분의 순도는 68.3%였으며, 그 조성은 campesterol 21.4%, ${\beta}$-stigmasterol 62.3%, sitosterol 11.0% 및 미확인물질 5.8%였다. 식물성스테롤 처리량의 증가에 따라 $0{\sim}3%(w/w)$ 처리군 에서의 중성지질, 총 콜레스테롤 및 인지질 함량의 감소는 비례관계가 성립하였으나 그 이상의 처리는 큰 차이가 없었다. 따라서 식물성 스테롤 처리가 혈장지질 농도와 밀접한 상관관계가 있으며, 식물성 스테롤의 적정 처리량은 3%(w/w)내외인 것으로 밝혀졌다. 한편 혈장, 근육조직의 인슐린 함량변화 등의 탄수화물 관련 조직에는 거의 영향을 미치지 않는 것으로 밝혀졌다.