고양이 줄무늬체 기저부에서 청색반점 신경원의 연접종말에 대한 전자현미경적 연구

김택수,천명훈,정진웅 대한해부학회 1997 Anatomy & Cell Biology Vol.30 No.4

재래누룩으로 담금한 탁주 술덧의 발효 과정 중 휘발성 향미성분

이택수,최진영 서울여자대학교 자연과학연구소 2007 자연과학연구논문집 Vol.19 No.-

재래식 누룩으로 담금한 탁주 술덧의 발효과정 중 휘발성 향미성분을 GC와 GC-MS를 사용하여 분석 동정한 결과 alcohol 19종, ester 21종, acid 10종, aldehyde 9종, 기타 3종 등 62종의 향미 성분이 동정되었다. 동정된 향미성분 수는 담금일에 ester 10종, alcohol 9종을 비롯한 총 24종이었으나, 발효 2일에 alcohol 5종, ester 8종 등을 포함한 13종이 추가 검출되어 32종으로 담금일보다 8종이 증가되었다. 발효 12일에는 향미성분 수가 62종으로 가장 많았다. 발효 전 과정을 통하여 검출된 ethanol, 3-methyl-1-butanol, 2-methyl-1-propanol, benzeneethanol 등 alcohol류 6종, ethyl acetate, ethyl caprylate, n-amyl butyrate 등 ester류 5종, pentanoic acid 1종 등 총 12종이 검출되었다. Ethanol을 제외하고 발효 전 과정을 통하여 면적비율이 높은 성분은 ethyl caprylate, 3-methyl-1-butanol, benzeneethanol 이었다. 재래식 누룩으로 담금한 탁주에서 ethanol은 면적비율이 78.80-91.94%로서 타 향미 성분보다 월등히 높았다. 이외의 발효기간에 따라서는 2,3-butanediol, ethyl benzoic acid, acetic acid, 2-methyl-1-propanol, butanoate, 1-hexanol, 1-dodecanol 등의 성분도 면적비율이 다소 높게 나타나기도 하였다. Volatile flavor components in the mash of Takjus prepared with Traditional nuruk were identified by using GC and GC-MS. Nineteen alcohols, 21 esters, 10 acids, 9 aldehydes and 3 others were found in the mash of Takju. Twenty-four components including 10 esters and 9 alcohols were detected in early stage of fermentation. Eight more components were detected after second day of fermentation and 62 components were detected after 12 days of fermentation. Twelve flavor components including 6 alcohols such as ethanol, 3-methyl-1-butanol, 2-methyl-1-propanol and benzeneethanol, 5 esters such as ethyl acetate, ethyl caprylate and ethyl butyrate and 1 acids were usually detected in the fermentation process. Ethyl caprylate, 3-methyl-1-butanol and benzeneethanol were some of the major volatile components through the fermentation respectively. Peak area of 2,3-butanediol, ethyl benzoic acid, acetic acid, 2-methyl-1-propanol, butanoate, 1-hexanol and 1-dodecanol among the same group were higher than other components depending upon fermentation time.

3차원 부유구조체의 동해석을 위한 파랑하중의 산정

허택녕,이재성 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-

Water wave motions are so varied and complex that a general solution does not exist from the mathematical viewpoints. Even in the simple cases, approximations must be made. One of the important aspects of water wave theories is the establishment of the limits of validity of the various solutions due to the simplifying assumptions. In this study, an analytical method for estimating the wave forces was presented, and the dynamic analysis of three dimensional floating objects was accomplished. From the determination of water load, it is shown that some water wave having specific length affects a significant influence to the floating objects and causes a resonance of floating object. Therefore it is concluded that the resonance of important off-shore structure was investigated through the dynamic analysis.

Aspergillus oryzae를 이용한 쌀과 콩 고오지 제조중의 성분과 효소활성의 변화

이택수,이선민 서울여자대학교 자연과학연구소 2003 자연과학연구논문집 Vol.15 No.-

쌀, 콩, 쌀과 콩의 흔용원료에 Aspergillus oryzae의 단모균 (A균주)과 장모균 (B균주)을 접종하여 만든 고오지 제조과정 중의 성분, 효소력 및 고오지 소화액의 성분을 분석한 결과는 다음과 같다. 고오지의 pH는 5.80-7.93 의 범위로 제국 초기보다 후기에 다소 상승되었으며 기질별로는 콩, 쌀, 쌀과콩의 혼용고오지의 순으로 pH가 높았다. 적정산도는 0.22-3.57 ml (0.1N NaOH)의 범위로 72시간까지 증가하는 경향이었다. 단모균은 장모균의 고오지보다 적정산도가 높은 편이고 기질별로는 쌀과 콩의 흔용고오지에서 높게 나타났다. 액화와 당화 amylase의 활성은 최대활성기인 48-72시간에 콩 단용 고오지에서 가장 낮았고 쌀, 쌀과 콩의 혼용 고오지에서는 활성이 비슷하였다. 액화와 당화 amylase의 활성은 단모균보다 장모균 사용의 고오지에서 높았다. 고오지의 산성 및 중성 protease활성은 72시간에 최 대활성을 보였고 이 시기에 콩, 쌀과 콩, 쌀 고오지의 순으로 활성 이 높았다. 중성 protease는 콩, 산성 protease는 쌀 고오지에서 각각 높은 경향을 보였고, 단모균은 장모균의 고오지 보다 산성 및 중성 protease활성이 높았다 Cellulase활성은 48-72시간에 최대활성을 보였고 단모균과 장모균의 활성차이는 불명확하였으나 장모균 사용 시 콩단용 고오지에서 활성도가 낮았다. 고오지 소화액의 성분 중 총질소와 아미노태질소는 단모균 사용의 콩고오지에서, 환원당은 장모균 사용의 쌀 고오지에서 각각 높게 나타났다. ◁표 삽입▷(원문을 참조하세요) We analyzed the components, enzymatic activities and the compositions of auto-digested products of the Koji prepared with rice, soy bean, and the mixture of rice and soy bean, in which each was inoculated with Aspergillus oryzse which had short-mycelium (A strain) or long-mycelium (B strain). The pH of Koji was in the range of 5.80-7.93, increased a little in the later period, and it was exhibited the higher value of pH in the order of soy bean, rice and the mixture Koji, The titrable acidities were 0.22-3. 57ml (0.1N NaOH) and shown to have tendency to be increased with time to the period of 72 hours. The titrable acidity of Koji with short mycelium was higher than that of the Koji with long mycelium. And the acidity of the Koji with mixture of rice and soy bean was higher with respect to substrate. Liquefying and saccharifying amylase activities were lower in the soy bean Koji in 48-72 hours, which was the maximal activated period. But the activities were shown similar in the Kojis with rice and mixture of rice and soy bean. Both activities were higher in the Koji with long mycelium than with short mycelium. The acidic and neutral protease activities of Koji was observed to be maximal at 72 hours in order of soy bean, mixture of rice and soy bean, and rice Koji, The neutral protease had tendency to be shown to be high activity in the soy bean Koji, and acidic activity was high in the rice Koji, The Koji with short mycelium had higher activities than that with long mycelium in acidic and neutral protease activities. The cellulase activity was maximal in period of 48-72 hours and the difference in activity was not evident in the Koji with short mycelium and with long mycelium. However, the activity was lower in the soy bean Koii when long mycelium was used. The total and amino nitrogen of component of auto-digested Koji was highest in the soy bean Koji when short myceliumed Aspergillus oryzse was used, and the content of reducing sugar was highest in the rice Koji when long myceliumed Aspergillus oryzse was used.

두피 피판술에 의한 두피 결손의 재건

이택종 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

The scalp is a unique structure. The outer three layers of the scalp are quite independent of the skull. They are intimately fused together and move over the skull as a unit with the contraction of the associated frontalis and occipitalis muscles. The major blood supply and nerves enter the scalp from the periphery. These vessels traverse through the subcutaneous tissue and anastomose freely throughout the scalp. Following a loss of the scalp, usually, The periosteum is intact and lends itself well to the application of intermediate-thickness split thickness skin grafts. But full-thickness defects involving loss of all layers down to and including the periosteum are more difficult problems. Necrosis and sequestration are probable if the calvarium is deprived of its periosteal blood supply. If the outer table of the skull is bared of periosteum, a split graft will not take and should not be attempted. An old, but well coven technique, involves the removal of the outer table of the skull, exposing the well-vascularized diploe¨. A craniotome and sharp osteotome are used to remove the entire outer table of the skull in an area in which full-thickness scalp has been lost. This area will then accept a split-thickness skin graft immediately. Ilematomas and subsequent loss of graft are not infrequent, however, if the graft is placed immediately. Another method that can be used is the employment of small drill holes placed close together, approximately 1cm apart, through the outer table down into the dipolic spaces. Usually granulation tissue will come up through these small holes and spread out over the bone and give satisfactory granulation tissue for support of a split thickness skin graft in about one month. Applying a splitthickness skin graft directly on bone does not give the optimum results. Many times these are unstable and, because of the shearing effect of the skin from bone, breakdowns occur frequently over a period of many years. So, every attempt should be made to restore physiologic and esthetic integrity to the scalp by covering the denuded areas with appropriate tissue. Use of local flaps is the best method to achieve that. The scalp flaps contain skin, subcutaneous tissue, and galea mobilized in one layer. Rotation flaps, transposition flaps, bipedicle flaps and multiple flap techniques are commonly used techniques for scalp reconstruction. The number and combination of flaps for correction of defects challenge the surgeon's creativity. We have good result using the methods of scalp transposition flap and Orticochea three flap technique for repair of full-thickness scalp defects, Therefore, we present our experiences and the advantages of these techniques are described.

朝鮮朝 政治思想의 硏究 : 朝鮮朝에 있어서 國家 및 政治體系에 대한 認識의 定向 Changes in the Conception of the State and the Political System during Yi-Dynasty

李澤徽 서울敎育大學校 1983 論文集 Vol.16 No.-

Bis-Diazotized Benzidine에 의한 연속 및 동시흡착법에 의하여 Tuberculin PPD로 감작된 적혈구를 이용한 혈구응집반응의 민감성

김택선,정상인,최철순,양용태 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.3

Passive haemagglutination test(PHA) using sheep red blood cells(SRBC) sensitized with soluble antigens by means of coupling agents, i.e., tannic acid, bis-diazotized benzidine(BDB), chromic chloride, glutaraldehyde, and so on, provide an extremely sensitive technique to detect a minute quantity of serum antibody as low as 0.01㎍. It also has advantage over agglutination and precipitation tests in that if it is transferred either to hemolysis test(PHL) or to inhibition test(PHI), soluble antigen-antibody complexes and incomplete or hapten antigen-nonprecipitating antibody complexes that are not detectable by other tests can be demonstrated. This study was undertaken to determine the optimum amount of BDB and tuberculin PPD antigen for consecutive and simultaneous coupling of SRBC in conjunction with the sensitivity of the PHA test. In addition, the sensitivities of PHA and PHL test were compared and the PHA units of antibody and diluents for tuberculin PPD antigen for PHI test were discussed. The results are summarized as follows: 1. The optimum amount of BDB for consecutive and simultaneous coupling of 0.2ml of 2.5% SRBC were 20㎍ and 13㎍, respectively, and the optimum amount of tuberculin PPD antigen were about 125㎍ and 250㎍ respectively. The optimum ratios between BDB and tuberculin PPD antigen for consecutive and simultaneous coupling were 1:6.3 and 1:19.2, respectively. 2. In the consecutive coupling, the PHA titre was linear to both BDB and tuberculin PPD concentrations, whereas in simultaneous coupling it was affected by the level of tuberculin PPD but not by that of BDB from 5㎍ to 13㎍. 3. Using SRBC sensitized consecutively with tuberculin PPD or sensitins prepared from four species of mycobacteria the homologous PHL tests were sensitive than the PHA tests by 1:2 to 1:4 dilutions, and the end-point of PHL test was more clear-cut than that of PHA test.

한국에 있어서의 국제이해교육 실태조사연구(基一) : 유네스코 협동학교를 대상으로

이택휘 서울 敎育大學校 1981 論文集 Vol.14 No.-

콘크리트 배합설계용 전문가 시스템의 개발

허택녕,어석홍,이석홍 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-

A prototype expert system for normal concrete mix design was developed using an expert system development tool, EXSYS Professional. The knowledge contained in the system was obtained from the standard specifications of Korea Concrete Institute. American Concrete Institute and from the related British Standards. The knowledge base and use interface will be expanded to cover wider scopes of the problems. If the system is successfully developed as an operational system, it will produce a great deal of economic benefits by reducing the time money needed to obtain an expert's judgement and experience in decision making for repetitive tasks related to concrete mix proportions.

γ-Fe_2O_3 의 製造 및 磁氣特性

金澤基,周赫鍾 충남대학교 공업기술개발연구소 1976 工業技術開發硏究所論文集 Vol.3 No.1

In case of the γ-Fe_2O_3 preparation, pH of the Fe(OH)_2 solution and oxidation temperature of the FeO(OH) which was influenced on the magnetic properties of the γ-Fe_2O_3 has been investigated. The magnetic properties of these samples were measured with self-made magnetic hysteresis loop tracer. The formation of compound γ-Fe_2O_3 has been confirmed by X-ray diffraction. It was obtained that the preparing conditions of γ-Fe_2O_3 were about pH 10 of Fe(OH)_2 solution and oxidation temperature 300℃ of FeO(OH). The purity of this sample was obtained about 95%. The saturation magnetization(Ms) and the coecive force (Hc) are found to be varied with pH and oxidation temperature, and the maximum value of Ms, 68 emu/gr, and of Hc, 140 Oe, are obtained at pH 10 and oxidation temperature 300℃.