• 한국염색가공학회지
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• 제3권2호
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• pp.43-48
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• 1991

Cellulose acetate (CA) and poly-4-vinyl pyridine (PVP) in various weight proportions were mixed in a mixed solvent of trifluoroacetic acid: methylene chloride/6:4 (v:v). CA was miscible with PVP in that solvent system. CA/PVP/solvent show liquid crystal in a certain range of concentration and the nature of that liquid crystal was cholesteric. Films of the liquid crystal composite cast from the liquid crystal solutions of CA/PVP were tested in a viewpoint of biomembrane. Results show that considering permselectivity CA/PVP membrane is better than that of CA and CA/PVP membrane is closer to cell membrane.

• Membrane and Water Treatment
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• 제3권3호
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• pp.201-209
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• 2012

Membrane separation technologies have some of advantages are considered a better alternative to traditional methods. Research of novel membranes is very vital for covering the higher required of membrane in several purposes like water desalting technology. In this work polyamide-6/cellulose acetate (PA-6/CA) blend membrane was developed according to the wet phase inversion system. The structures of the prepared membranes were examined by scanning electron microscopy (SEM). SEM images showed uniform particles distribution in the prepared membranes. Moreover, SEM images revealed that the membranes have relatively uniform surface (PA-6/CA). PA-6/CA blend membranes systems are evaluated by using synthetic NaCl solution. The separation performance showed that salt rejection increased with increasing of heat treatment of the casted films and it was improved with increasing of operating pressure.

• 한국기계가공학회지
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• 제10권5호
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• pp.31-37
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• 2011

For the domestic glasses industry to procure competitiveness in the world CA(Cellulose Acetate) frame of spectacles market, CNC machining system for CA frame including high-value added CA cutting technologies should be developed with new materials for the rim based on Cellulose and sheet manufacturing base. The spindle system of glasses frame equipment that is the core to the quality of CA frame is the key technologies to realize high-speed, high-precision so its importance is remarkably emerging. In the study, at the structural design of the high spindle system of the private equipment for CA glasses frame embedded a motor of 40,000rpm, the stability of design was analyzed and investigated through selecting lubrication structure and thermal characteristics of the spindle system.

• 생약학회지
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• 제33권3호통권130호
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• pp.257-261
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• 2002

Each ferritin molecule consists of light subunit 19,000 dalton and heavy subunit 22,000 dalton. Twenty-four protein subunit about $440,000{\sim}500,000$ dalton apoferritin which contained $20{\sim}30%$ Fe as ferric hydroxyphosphate polymer form. Horse spleen-derived ferritin consists of 90% light subunit. These genetic characteristics of ferritin preparations were able to determine by cellulose acetate electrophoresis, but these ferritin preparations contained other components to be disturbed during refining, extraction and making finish products and have difficulties in deciding to be just. So, this study was performed to establish the scientific method for determine the quality of ferritin preparations with immunodiffusion methods which has high specificity between heterogeneous proteins.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2009년도 Korea Superconductivity Society Meeting 2009
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• pp.54-54
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• 2009

• 대한수의학회지
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• 제24권1호
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• pp.31-35
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• 1984

The hemoglobin phenotype and the gene frequencies of 44 Formosan deer(Cervus nippon) in Kyung-Gi area were examined by using cellulose acetate and starch gel electrophoresis. 1. The method of cellulose acetate electrophoresis was simplier, more clear and preserative than starch gel electrophoresis. 2. The hemoglobin phenotype was appeared 3 types as $Hb^F$ $Hb^{FS}$ and $Hb^S$. The frequencies of appearance were $Hb^F$ 47.7%, $Hb^{FS}$ 47.7% and $Hb^S$ 4.5%, respectively. 3. The genetic factors of hemoglobin were observed as $Hb^F$ and $Hb^S$ and the rates of gene frequencies were 71.6% and 28.4%, respectively.

• 한국산업융합학회 논문집
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• 제2권2호
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• pp.83-90
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• 1999

A cellulose acetate membrane containing silver nitrate was prepared by gelatinizing in water at $2^{\circ}C$ after evaporating solvent from the casting solution on a glass plate. Permeation experiments for oxygen and nitrogen were conducted in the ranges of temperature, $5-40^{\circ}C$ and pressure difference, $1-5kg/cm^2$ in order to investigate the effects of temperature and pressure difference on permeation characteristics of the membrane. When the evaporation time was increased, the permeability of oxygen decreased but the separation factor of oxygen against nitrogen increased since a more dense layer was formed on the membrane surface. When the silver nitrate was added, the permeation flux was doubled and the separation factor was improved from 3.0 to 3.3. This implies that silver nitrate acts as an oxygen carrier in the membrane.

• 멤브레인
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• 제9권1호
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• pp.17-24
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• 1999

본 연구에서는 관형 상용막(ultrafiltration (UF), nanofiltration(NF)을 이용하여 우유를 농축하고 농축 성분의 변화를 알아보았다. 친수성막(sulfonated polysulfone (SPSf), polyacrylonitrile(PAN), cellulose acetate(CA)) 의 경우에는 투과유의 투과속도 감소가 완만하고 소수성막의 경우에는 투과속도 감소가 심하였다. UF 농축이 경우 전고형분, 단백질,지방 미네랄은 농축에 따라 증가하고 탄수화물은 감소하였다. NF 농축의 경우 UF와 같은 경향을 보였지만 탄수화물의 감소경향이 훨씬 적었다.

• 한국동물학회지
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• 제17권4호
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• pp.159-162
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• 1974

韓國産 개구리 目의 8種에 대하여 血色素와 血淸 단백질의 cellulose acetate 電基泳動圖를 조사하였다. 혈색소의 전기영동도는 종에 따라 그 구성성분의 수와 이동도에 차이가 있었다. 두꺼비와 금개구리에서는 단일 밴드로 나타났고, 여타의 종에서는 2밴드로 분리되었다. 혈청단백질의 전기영동도는 종에 따른 특징을 잘 나타내고 있다. 이들 동물의 혈청단백질에서는 다형현상이 나타나지 않았다. 모든 실험재료에서 albumin은 뚜렷이 나타나지만 prealbumin은 나타나지 않았다. 두꺼비에서는 albumin과 postalbumin 사이가 분명하게 분리되지 않았다. 따라서 혈청단백질의 전기영동도에서 두꺼비와 다른 종들을 쉽게 구별할 수가 있었다.

• Journal of Pharmaceutical Investigation
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• 제21권4호
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• pp.253-262
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• 1991

Microencapsulation of sodium ascorbate with cellulose acetate phthalate(CAP) by coacervation/ phase separation method were carried out. Various factors affecting microencapsulation, i.e., surfactant concentration. CAP concentration, stirring speed and treatment of spermaceti as a sealing agent were studied. Dissolution rate. particle size distribution, surface feature and stability test were investigated. CAP microcapsules prepared using 0.5% span 80 as a surfactant showed smooth and round surfaces. The release of sodium ascorbate was retarded by microencapsulation with CAP and by sealant treatment with spermaceti. When triturated with sodium bicarbonate, CAP microcapsules were more stable than unencapsulated sodium ascorbate under various RH conditions at $37^{\circ}C$.