시판 요구르트 Starter의 생리적 특성

임용숙,김순희,이신호 대구효성가톨릭대학교 응용과학연구소 1994 응용과학연구논문집 Vol.3 No.-

시판 호상 요구르트의 품질 검사와 분리된 유산균의 starter특성을 조사한 결과 시판 요구르트의 유산균 수는 9개 회사 시료중 1개 회사가 1.66×10^6CFU/g 을 나타내었고 그외 8개 회사제품은 10^8 ~ 10^9CFU/ml 범위를 나타내었다. 제품의 pH 범위는 4.00 ~ 4.33 으로 비교적 산미가 강하였으며, 적정산도는 1.063 ~ 1.321% 였다. 순수 분리한 요구르트 starter의 산 생성 속도는 배양 시간이 경과함에 따라 적정산도가 모두 증가하는 것으로 나타났다. 특히 배양 12시간째 starter B가 산 생성이 가장 좋았으며, starter E의 산 생성 속도가 가장 늦었다. 9개 회사 starter는 공히 위액과 담즙산에 강한 내성이 관찰되었으며 특히 D, E, G 균주의 경우 위액과 담즙산에 거의 생존하여 가장 내성이 강한 경향을 나타내었다. Viable cells, pH and titrable acidity of nine kinds of marketing gel-type yoghurts and acid production and survival in digestive fluids and bile salts of the isolated starters were investigated. Viable cells of one sample was 1.66×10^6(CFU/g) and other eight samples show-ed about 10^8 to 10^9 (CFU/g). All samples tested had a strong acidic taste with the pH of 4.0 to 4.3 and titrable acidity with 1.063 ` 1.321% lactic acid/ml. Acid production of isolated yoghurt starter increased during incubation. After 12 hr incubation, starter B showed the highest acid pro-duction ability but starter E was the lowest. All of starters were survived in artificial gastric juice and bile salts, especially starter B, E and I showed the strong resistance in artificial gastric juice and bile salts.

Detection of Antibokies to Sendai Virus Using protein G-based ELISA

임윤규,우희종,이영순 濟州大學校 農科大學 動物科學硏究所 1993 動物科學論叢 Vol.8 No.1

We have established an enzyme-linked immunosorbent assay(EL1SA) using enzyme labeled protein G(Protein G-ELISA) to detect Sendai virus-specific antibodies in laboratory animals. Best results were obtained at fl 6.0 of diluent and at 1 to 10 dilution of sera. Antigen concen-tration for solid phase matrix was 5μg /㎖ and the conjugate of horseradish peroxidase (HRP) and prqtein G was used at 1 to 100 dilution. We, also, investigated the sensitivity and speci-ficity of protein G and protein A. Protein C showed relatively high O. D. values than protein A in general. Furthermore, only Protein G-ELISA could detect the Sendai virus specific anti-bodies in rat. though both methods were effective in other species, mouse and guinea pig. No siginificant nonspecific reation was observed at our experimental conditions in both methods.

시판 요구르트 Starter의 생리적 특성

임용숙,김순희,이신호 대구효성가톨릭대학교 식품과학연구소 1994 식품과학지 Vol.6 No.-

시판 호상 요구르트의 품질 검사와 분리된 유산균의 starter 특성을 조사한 결과 시판 요구르트의 유산균 수는 9개 회사 시료중 1개 회사가 1.66×10^6CFU/g을 나타내었고 그외 8개 회사제품은 10^8~10^9CFU/㎖ 범위를 나타내었다. 제품의 pH 범위는 4.00~4.33으로 비교적 산미가 강하였으며, 적정산도는 1.063~1.321%였다. 순수 분리한 요구르트 starter의 산 생성 속도는 배양 시간이 경과함에 따라 적정산도가 모두 증가하는 것으로 나타났다. 특히, 배양 12시간째 starter B가 산 생성이 가장 좋았으며, starter E의 산 생성 속도가 가장 늦었다. 9개 회사 starter는 공히 위액과 담즙산에 대한 내성이 관찰되었으며 특히 D, E, G 균주의 경우 위액과 담즙산에 거의 생존하여 가장 내성이 강한 경향을 나타내었다. Viable cells, pH and titrable acidity of nine kinds of marketing gel-type yoghurts and acid production and survival in digestive fluids and bile salts of the isolated starters were investigated. Viable cells of one sample was 1.66×10^6(CFU/g) and other eight samples showed about 10^8 to 10^9(CFU/g). All samples tested had a strong acidic taste with the pH of 4.0 to 4.3 and titrable acidity with 1.063-1.321% lactic acid/㎖. Acid production of isolated yoghurt starter increased during incubation. After 12 hr incubation, starter B showed the highest acid production ability but starter E was the lowest. All of starters were survived in artificial gastric juice and bile salts, especially starter B, E and I showed the strong resistance in artificial gastric juice and bile salts.

한국인 파킨슨병에서 Monoamine Oxidase B 유전자와 Cytochrome P450IID6 유전자의 다형성

이용희,임정근,이상도,이영재 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

발레 그랑 쥬떼 동작의 운동학적 분석

심재희,임용규,우병훈 한국학교체육학회 2003 한국학교 체육학회지 Vol.13 No.2

본 연구의 목적은 발레에서 그랑 쥬떼(grand jete´) 동작을 3차원적 동작분석을 통하여 숙련자와 미숙련자 사이의 차이점을 운동학적인 변인으로 규명하는데 있으며, 또한 차이가 나타난 변인에 대한 원인을 분석하여 발레를 지도하는 데 있어서 과학적 자료를 제공하고자 한다. 연구결과에 기초하여 발레 그랑쥬떼 동작은 도약전에는 신체중심을 낮게 하고 오른쪽 발끝의 속도를 빠르게 하여 높은 신체중심으로 체공시간을 길게 하고 양다리를 최대로 신전하여 좌·우 대퇴각은 수직과 수평으로의 더 많은 공간과 힘을 이용하는 것이 효율적인 동작을 수행할 수 있는 결과로 사료된다. The purpose of this study is to analyze the movement of Grand Jete´ through the analysis of 3-dimensional movement, and to find out the difference between experts and the unskilled through kinematical cause. And the purpose is also to provide scientific source by analyzing the cause of its difference when teaching ballet. I come to the condusion below through the kinematical analysis in order to achieve this purpose of the study. 1. The time required means the time needed between each event. It takes the experts 0.361 second from E-3, which is from jumping to reaching the highest point, to E-4, which is a landing point, on the other hand, it takes the unskilled 0.252 second. It takes the longest time to stay in the air between E-3 and E-4. The total required time is 0.694 seconds in case of the experts, and 0.548seconds in case of the unskilled. Concerning the duration of staying in the air, the case of the former is longer than the one of the latter. There is the significant difference between the former and the latter (P<.05). 2. In case of experts, the displacement of the bodily center is 83.44±1.09% in E-3, and in case of the unskilled, 76.44±1.00%. Concerning the height of the bodily center, the case of the former is higher than the one of the latter. There is the significant difference between the former and the latter (P<.01). 3. The speed of the tiptoe to the right side is the top speed between E-3 and E4. The speed of experts in E-2 is 7.69±3.57m/s, and the one of the unskilled in E-2 is 9.51±0.99m/s. The speed of the former is remarkably reduced compared to the one of the latter. There is the significant difference between the former and the latter (P<.01). 4. In the case of the displacement in angle of the right and left ankle joints, temporary reduction of the angle of the experts right ankle in E-2 influences the vertical rise and the horizontal movement. There is the significant difference in E-4 (P<.05). 5. Concerning displacement in angle of the right and left coxae, the experts right coxa angle is 100.58±6.98°, and their left one is 108.92±3.58°. In case of the unskilled, the right coxa angle is 89.66±6.58°, and the left one is 130.33±5.49°. The unskilled need the power and flexibility of the femoral muscle of the left coxa. There is no significant difference between the former and the latter. Based on the result of the study, they should lower the bodily center before jumping and make the speed of the right tiptoe fast when they practice the movement of Grand Jete. And then using high bodily center, they have to prolong the time of staying in the air. Simultaneously, they should stretch both legs so that the right and left femoral ankle can use more space and power vertically and horizontally. Those series of movement can make them practice Grand Jete better.

만성폐쇄성 폐질환 환자에서 적혈구 항산화효소의 변화

국기용,이만재,조희충,임영국,박일,김원식,이승일,이병래 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1

Toxic oxygen free radicals have been implicated as important pathologic mediators in many clinical disordesrs. Enhandng the intracellular content of antioxidant enzymes can provide means of limiting biological damage caused by oxygen free radicals. Many investigations have examined the potential of various oxyradical scavengers to modulate oxyradical injury. The oxygen free radicals play a role in the pathogenesis of chronic obstructive pulmonary disease. To investigate the pulmonary oxyradical injury and the protective role of antioxidant enzymes, author measured the amount of thiobarbituric acid reactants, the activiteies of antioxidant enzymes (superoxide dismutase, glutathione peroxidase, and catalase) and the sulfhydryl groups in serum and red blood cells from the chronic obstructive pulmonary disease groups and the normal controls. The thiobarbituric acid reactant in chronic obstructive pulmonary disease groups was increased than the controls in both serum and red blood cells, and the superoxide dismutase activity in red blood cells was no statistically difference in both groups. But, the glutathione peroxidase and catalase activities were lowered in chronic obstructive pulmonary disease groups than the controls. The sulfhydryl groups in serum and red blood cells were no statistically difference in both groups. These results suggest that the increased thiobarbituric acid reactant in chronic obstructive pulmonary disease groups mean oxygen radical toxicity, and the decreased glutathione peroxidase and catalase activities may play a role in cellular injury.

아몰퍼스 자왜 와이어의 제작과 센서특성

신용진,임재근,조남희 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this paper, we describe fabrication method and sensing functions of amorphous magnetostrictive wire. (Fe,Co)77Si8B5 chosen as nonstoichometric composition, is melted under high frequency induced furnance and then the melted composition is injection-quenched on water-flow at high speed revolution through the nozzle. As the result amorphous magnetostrictive-wires whose diameters are about 125㎛ are obtained On investigation of characteristics of the amorphous wires, a sharp Matteucci effect occurs even by low external magnetic field. It occurs by large Barkhausen jump due to magnetostriction of the amorphous wire. As the results of experiments, we find that amorphous-wires have sufficient characteristics needed as high sensitive security sensor material.

이중구조 촉매전극을 이용한 알칼리 연료전지에 관한 연구

노용우,이태희,설용건,장의종,김경림 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.1

An experimental low-temperature low-pressure hydrogen-oxygen alkali fuel cell was constructed and its performance was tested for various operating conditions. Hydrogen was used for fuel and oxygen was used for oxidant and KOH solution was used for electrolyte. Both electrodes for hydrogen and oxygen were prepared by the same method and the materials used were carbonyl nickel and ammonium bicarbonate. Experimental results show that maximum current density of 8.91 mA/㎠ was obtained at 40℃ wt% KOH solution and optimum power was 1.74 mW/㎠ at 6.43 mA/㎠ current density.

지구과학의 개념형성학습에 관하여 : 변화에 대한 개념을 중심으로 Especially Concerning to Concepts about Changing Phenomena

姜用熙,林成圭 경북대학교 과학교육연구소 1989 科學敎育硏究誌 Vol.13 No.-

By analyzing Earth Science textbooks currently used in high schools. we tried to establish a basic conceptual system concerning to changing phenomena based on the ESCP's structuralizing scheme. Investigating facts about time and change, we have found 21 basic concepts which should be understood through concept-forming teaching and learning. By classifying the basic concepts to fit the four principles suggested by NSTA as a scientific basic-system. we also tried to generalize the selected concepts. We made test problems in order to test high school students' understanding about earth science concepts especially concerning the changing phenomena in the field of astronomy. Using questionnaire method, we applied the test problems to 160 high school students in Taegu and Kyungpook areas. The results were as follows : the mean score of concept-learned group was 56.0 and that of unlearned group was 48.5. This means that the learned-group had been improved by concept-forming teaching.

Cu-SiO₂촉매상에서 메탄올의 메틸포메이트로의 탈수소 반응에 관한 연구

김경림,박해경,설용건,이태희,전민기 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

Cu-SiO₂촉매상에서 구리의 함량을 달리하며 메탄올을 반응물질로 하여 탈수소 반응을 고정층 연속흐름 반응기에서 행하였다. 조작조건의 범위는 온도 175∼250℃, 압력 ?? 접촉시간 0.013∼0.043g.cat.hr/mL이었다. 구리의 함량에 따라 전화율과 선택도가 달라지고 구리의 함량이 1.5wt.%일 때 메틸포메이트로의 수율이 가장 좋았다. 최적 조작 조건은 온도와 접촉시간이 각각 225℃, 0.033g.cat.hr/mL 부근이었다. 이온 교환법으로 제조된 1.5wt.% Cu-SiO₂촉매상에서 메탄올의 탈수소 반응의 활성화 에너지는 3.73kcal/mol이었다. The dehydrogenation of methanol to methylformate was studied over Cu-SiO₂catalyst prepared by ion-exchange method with the change of copper content in a fixed bed, continuous flow reactor. The ranges of experimental conditions were : at the temperature between 175℃ and 250℃, pressure at ??, and contact time between 0.013 and 0.043g.cat.hr/mL. Conversion and selectivity were changed with Cu content and yield of methylformate showed the highest value with 1.5wt.% Cu. The optimum conditions were 225℃, 0.033g.cat.hr/mL for reaction temperature and contact time, respectively. The activation energy of dehydrogenation of methanol to methylformate was 3.73kcal/mol over 1.5wt.% Cu-SiO₂.