• KSBB Journal
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• v.29 no.5
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• pp.307-315
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• 2014

Recently seaweed polysaccharides have been extensively studied for alternative energy application. Because their producing cost is high and efficiency low, their industrial applications have been limited. The main component of cell wall of red algae represented by Gelidiales and Gracilariales is agar. Red-algae agar or galactan, consisting of D-galactose and 3, 6-anhydro-L-galactose, is suitable for bio-product application if hydrolyzed to monomer unit. For the hydrolysis of algae, chemical or enzymatic treatment can be used. A chemical process using a strong acid is simple and efficient, but it generates together with target sugar and toxic compounds. In an enzymatic hydrolysis process, target sugar without toxic compounds generation. The objective of this review is to summary the recent data of saccharification by chemical and enzymatic means from red seaweed for especially focused on automobile industry.

• Journal of Acupuncture Research
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• v.18 no.3
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• pp.48-55
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• 2001

Objective : The main cause of back pain & sciatica is HNP of L-spine. Recently, 8 Constitution Acupuncture is largely used for it, but the effects isn't announced. So we studied. The perceived pain diminishment is compared with Body acupuncture and 8 Constitution acupuncture. Methods : VAS(Visual analogue scale) was used for this research, with the pain indicator of 10 and 0 which represents a patient admission to a hospital and a status of no pain respectively. Two groups, consisting of Body acupuncture group with 17 persons and 8 Constitution acupuncture group with 12 persons, was randomly allocated for this research. SPSS(Statistical Program for Social Science) for window is used for a statistical analysis, and the independent T-test is performed to gauge the improvement of VAS, in which case, value of P below 0.05 is considered as useful. Results : The result of the VAS of comparison analysis between two groups after 10 days, shows that the improvement of subjective symptoms in Body acupuncture group is more effective than that in 8 Constitution acupuncture group. (independent T-test, P=0.009)

• Journal of Yeungnam Medical Science
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• v.33 no.1
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• pp.25-28
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• 2016

Nephrotic syndrome is associated with a hypercoagulable state, which results in thromboembolism as one of its main complications. Various pathogenetic factors that cause the hypercoagulable state in nephrotic syndrome have been recognized. We report on a 19-year-old female with a minimal-change disease who developed pulmonary thromboembolism combined with intracardiac thrombus while on tapering steroid. Our patient showed hypoalbuminemia with an episode of shock, and was successfully treated with thrombolysis and anticoagulation therapy.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.169-174
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• 2006

최근의 휴대전화는 음성 통화뿐만 아니라 메시지 및 이메일 송/수신, 사진/동영상 촬영 등 다양한 종류의 작업을 수행할 수 있으며, 그 기능이 점차 확장되고 있는 추세이다. 그러나 화면 공간의 제약으로 인한 메뉴 항목명의 축약, 메뉴 항목수의 증가, 메뉴 구조의 복잡화 등의 원인 때문에 많은 사용자들이 메뉴검색에 불편함을 겪고 있다. 이러한 문제점을 해결하기 위해, 본 연구에서는 기존의 메뉴 네비게이션을 통한 검색 방식, 하위 메뉴항목 제시 방식 이외에, 키워드 검색방식 및 유사 키워드 검색 방식을 개발하고 4가지 메뉴 검색방식의 사용성 평가실험을 수행하였다. 사용성 평가 실험 결과, 수행도 측면에서는 메뉴 검색 방식간의 차이가 유의하지 않았지만, 사용자 만족도 측면에서는 통계적으로 유의한 차이가 존재하였다. 4가지 메뉴 검색 방식 중 유사 키워드 방식은 사용자 만족도 측면에서 가장 선호되는 방식으로써, 추후 실제 휴대전화에 적용될 경우 사용자 만족도를 제고할 수 있을 것으로 기대된다.

• Journal of Microbiology
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• v.34 no.1
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• pp.90-94
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• 1996

The carboxymethyl cellulase (CMCase) was purified from the induced culture filtrate of hybrid TAPW15703 between Aspergillus niger and penicillium verruculosum made by nuclear transfer. The enzyme was purified 80 fold with an overall yield 17% from the culture medium by ammonium sulfate fractionation, Sephadex G-75 gel permeation chromatography, and DEAE-ion exchange column chromatography. The molecular weight of the CMCase has estimated to be 32,000 daltons on SDS-polyacrylamide gel electrophoresis and Sephadex G-150 gel permeation chromatography. The purified enzyme functions optimally at pH 4.0 and 4$0^{\circ}C$ The Km value for carbosymethyl cellulose was 68 mM. The enzyme activity was increased by the presence of $Mg^{2+}$and Mn$^{2+}$.

• Korean Journal of Materials Research
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• v.10 no.8
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• pp.545-550
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• 2000

3Y-TZP, 12Ce-TZP 및 3Y-TZP, 12Ce-TZP 현탁액의 제타포텐셜과 겉보기점도의 측정으로부터 슬립주입공정에 의한 다층복합체의 제조조건을 조사하였다. 아울러 다층복합체의 소결밀도, 미세구조, 결정상에 미치는 열처리의 영향을 검토하였다. 3Y-TZP와 12Ce-TZP 현탁액의 등전점을 pH 8부근이었으나 3Y-TZP/12Ce-TZP의 등전점은 pH8.6이었다. 현탁액은 전단속도의 증가와 더불어 점도가 감소하는 의가소성유동을 나타내었다. 15 및 20vol% 고체함량을 갖는 3Y-TZP와 3Y-TZP/12Ce-TZP 현탁액은 소량(0.3wt%)의 유기해교제의 첨가만으로 슬립주입에 적당한 유동성을 보유하였으나, 12Ce-TZP의 경우는 점도를 감소시키기 위하여 부가적인 전해질이 필요하였다. 이론밀도의 98% 이상을 보유하고 0.3~$2.2\mu\textrm{m}$의 입경을 갖는 치밀한 다층복합체가$ 1500^{\circ}C$ 소결로 얻어졌다.

• Proceedings of the Korean Society of Veterinary Clinics Conference
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• 2009.10a
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• pp.223-223
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• 2009

• Bulletin of the Korean Chemical Society
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• v.34 no.1
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• pp.174-178
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• 2013

A highly reliable dealkylation protocol of alkyl aryl ethers, whose alkyl groups are longer than methyl group, has been developed. We report that various ethyl, n-propyl, and benzyl aryl ethers are successfully cleaved using an ionic liquid, 1-n-butyl-3-methylimidazolium bromide, [bmim][Br], under microwave irradiation. Despite many characteristics such as lower cost and less toxicity of the alkylating agents, and greater hydrophobicity of the products, longer alkyl ethers have been significantly less exploited than methyl ethers, probably due to more difficulty in the deprotection step. Since it has the same advantages as the demethylation method developed by this group including mild conditions, short reaction time, and small use of the ionic liquids, the dealkylation protocol can greatly encourage the broader use of longer alkyl groups in the protection of phenolic groups. As with our previous study of demethylation using [bmim][Br], the microwave irradiation is crucial for the deprotection of longer alkyl aryl ethers. Unlike the conventional heating, which causes either low conversion or decomposition, the microwave irradiation seems to more effectively provide energy to cleave the ether bonds and therefore suppresses the undesired reactions.

• Proceedings of the Korean Society of Veterinary Clinics Conference
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• 2006.11a
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• pp.104-104
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• 2006

• Korean Journal of Crystallography
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• v.16 no.2
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• pp.141-148
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• 2005

It is well known that the general metals have a lot of grain boundaries. The grain boundaries play a negative role to increase the resistivity and to decrease the conductivity. The small resistivity and the large conductivity have been a goal of the material scientists, and no signal noise, perfect signal transfer, and the realization of the real sound are the dream of electronic engineers and audio manias. Generally, oxygen free copper (OFC) and Ohno continuous casting (OCC) copper cables have been used for the purpose of the precise signal transfer and low noise. However they still include a lot of grain boundaries. In our study, we have grown the single crystal by the Czochralski method and succeeded to produce single crystal wires from the crystal in the dimension of $0.5{\times}0.5{\times}2500mm$. The produced wire still possesses very good single crystal properties. We observed the structure of the wire, and measured the resistance and impedance. Glow Discharge Spectrometer (GDS) was used for analyzing the compositions of copper single crystals and commercial copper. Current-Voltage curve, resistance, total harmonic distortion and speaker frequency response were measured for comparing electrical and acoustic properties of two samples.