• 대한핵의학회지
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• 제33권4호
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• pp.430-438
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• 1999

목적: 마이크로웨이브를 이용한 방사성 동위원소의 표지와 Sep-Pak 카트리지를 이용한 정도관리 방법의 개선으로 신속한 제조가 가능하면서도 높은 표지효율을 가진 방사성 의약품을 얻고자 하였다. 대상 및 방법: $C_{18}$ 그리고 alumina N Sep-Pak카트리지를 이용한 정도관리 방법을 $^{99m}Tc$-ECD, $^{99m}Tc$-MIBI, $^{99m}Tc-MAG_3$에 적용하였고 표지효율을 측정하였다. 마이크로웨이브를 사용하여 상기의 키트에 방사성 동위원소를 표지하여 표지효율을 비교하였다. 결과: 마이크로웨이브에 의해 생성된 세 가지방사성 의약품은 3 ml용액에 $^{99m}Tc$-ECD와 $^{99m}Tc$-MIBI는 10초, $^{99m}Tc-MAG_3$는 15초의 짧은 마이크로웨이브를 조사하여 모두 95% 이상의 표지효율을 나타내었다. $^{99m}Tc$-ECD와 $^{99m}Tc$-MIBI는 Sep-Pak alumina N 카트리지를 사용하여 짧은 시간 내에서도 정확한 정도관리 결과를 얻을 수 있었다. 방사성 의약품의 제조시간은 정도관리를 포함하여 모두 6분 이하를 나타내었다. 결론: Sep-Pak 카트리지를 이용한 정도관리 방법과 마이크로웨이브에 의한 방사성 의약품의 제조 방법은 일상적인 방사성 의약품의 제조에 적용이 가능하였으며, 방사성 의약품의 제조시간을 크게 단축시킬 수 있었다.

• Food Science and Biotechnology
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• 제14권4호
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• pp.543-546
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• 2005

Optimized conditions for protoplast preparation and regeneration from young hyphae of Monascus ruber were established. Heat shock treatment of spores gave rapid and synchronized germination. Spores collected from cultures grown for 7-8 days at $30^{\circ}C$ were germinated until over 70% germ tubes reached to 3-5 spore length. Enzymatic digestion of young hyphae was optimal with 50 mg/mL Glucanex in 0.1 M sodium citrate buffer containing 0.8 M mannitol as an osmotic stabilizer. Regeneration rate was around 10% when 0.8 M sorbitol was used as an osmotic stabilizer in regeneration medium. These conditions will be applied in genetic study of M. ruber that produces citrinin at high level and thus is good model strain for molecular genetic dissection of citrinin biosynthesis.

• 한국세라믹학회지
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• 제49권5호
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• pp.454-460
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• 2012

The nano-sized zirconia powders were synthesized in an impregnation method using pulp and $ZrOCl_2{\cdot}8H_2O$ as an initial material. The synthesized powders were characterized by XRD and FE-SEM. The particle size of the powder was controlled by preparation conditions, such as drying temperature and time. As a result of the various drying and calcination conditions, 30~50 nm sized homogeneous zirconia particles were obtained at $800^{\circ}C$ for 1 h. Crystallization and the rapid growth of particles were accelerated with increasing calcination temperature and time. Tetragonal phase generated below $800^{\circ}C$ were transferred to monoclinic phase with increasing calcination temperature and time. Moreover, above $800^{\circ}C$, heat treatment time had very large influence on the particle growth, and the change of drying condition also had large influence on the growth of a crystal.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1022-1022
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• 2001

To obtain accurate and repeatable analyses using NIR technology it is important to select an NIR instrument and / or its sample presentation attachments which allow the operator to minimize sampling errors without compromising the benefits of NIR analysis -namely rapid, low cost, minimal sample preparation, minimal structural facilities, minimal hazards. For each sample type and consistency there may be different optimal combinations of instrument, sample presentation attachment, and sample preparation. This paper will consider options available to NIR users in the area of plant and soil analysis and evaluate the potential benefits and disadvantages of crop nutrient diagnoses using laboratory based and airborne imaging techniques.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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• pp.1009-1012
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• 2003

A novel powder processing technique for the preparation of copper activated zinc sulfide (ZnS:Cu,Al) phosphor by combustion process has been proposed. Exothermic reaction between dissolved copper nitrate and carbohydrazide give small-sized particles in presence of alkali metal halides at lower temperature than the traditional method of preparation. This new route takes less than five minutes and requires much less energy. The optical and luminescence characteristics of ZnS:Cu,Al phosphor thus prepared were found to be enhanced significantly. Carbohydrazide acted as fuel at $500^{\circ}C$ with rapid heating and then the phosphors obtained were heated at $900^{\circ}C$ in an inert atmosphere for 3hrs to get better luminescent properties.

• 분석과학
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• 제11권6호
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• pp.474-477
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• 1998

화학발광고속액체크로마토그래피(chemiluminescence-HPLC, CL-HPLC)법을 이용하여 생체지질과산화물의 측정에 있어서 표준물질인 포스파티딜콜린 하이드로퍼옥사이드(phosphatidylcholine hydroperoxide, PCOOH)의 조제법을 개발하였다. 미산화의 포스파티딜콜린(PC)에 로즈벤갈(rose bengal)을 첨가하여 형광분광광도계에서 1시간 조사시킴으로써 광 산화 시켰다. 얻어진 PCOOH의 농도는 FOX(ferrous oxidation-xylenol orange)법으로 측정하여 계산한 후, 일정 농도로 희석하여 CL-HPLC계에서 분석하였다.

• Bulletin of the Korean Chemical Society
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• 제33권11호
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• pp.3745-3748
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• 2012

This study presents a rapid and simple ${\alpha}$ source preparation method for a radioactive waste sample. The recovery of $^{239}Pu$, $^{232}U$ and $^{243}Am$ using a micro-coprecipitation method was over 95%. The ${\alpha}$-peak resolution of Pu and Am isotopes through the micro-coprecipitation method is enough to discriminate the Pu and Am isotopes from other Pu and Am isotopes. The determination of the Pu and Am isotopes using the micro-coprecipitation method was applied to the radioactive waste sample, so that the activity concentrations of the Pu and Am isotopes using the micro-coprecipitation method in the radioactive waste sample were similar to those using the electrodeposition method.

• Fisheries and Aquatic Sciences
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• 제1권2호
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• pp.187-191
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• 1998

Chemotherapy can not be applied for the control of fish viral diseases because viruses depend on host machinery for their replication. Although new control strategies including vaccination are under development, avoidance of virus introduction by rapid and correct diagnosis is the best way of fish viral disease control. Although observation of virus particles with an electron microscope is an easy method for virus detection, it take a few days for the sample preparation. In order to shorten the sample preparation time, microwave radiation was applied in the procedure. With this method, 15 seconds was enough for fixation of virus infected fish samples or cultured cells inoculated with infectious hematopoietic necrosis virus, which takes 2-4 hours with routine methods. Also four minutes was enough for polymerization of embedding resin which takes 24-48 hours with routine methods. Samples prepared with microwave were good enough for direct electron microscopic observation and immunogold labeling assay.

• 한국미생물·생명공학회지
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• 제17권4호
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• pp.403-406
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• 1989

To establish tile standard condition of uniformed Kimchi product, we introduced the concept of starter and studied the preparation of rapid-fermented Kimchi. Of the strains isolated from Kimchi, Kakdugi and infant's feces, M7 strain grew effectively on aseptic Chinese cabbage juice and on salted Chinese cabbage, the growth of M7 was decreased severely. Inoculated with M7 in salted Chinese cabbage, appropriate range of pH and lactic acid content were reached at 8-13 hrs and 12 hrs after addition of spices, respectively. The result of sensory evaluation was not significant at 5% level.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.898-902
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• 1995

STEP is a neutral model for exchanging CAD modelbetween different CAD systms. The paper presents a laser path contour generation for rapid prototyping originated form STEP format files without using any tools nor libraries for STEP data manipulation. Polygons are generated from every point on the layer of given thickness, which are the intersections of layer plane and edges stored in entity tables. Curves are approximated with polygons whitin segment tolerance limit in order to cover sculptured surfaces. With the advantage of less data loss in direct slicing over STL formats, the system developed in this work shows a good potential to provide data share with various CAD systems including RP data preparation.