Jo,Kyung-Yul

조경열,최윤수,석경순 대구효성가톨릭대학교 1986 연구논문집 Vol.32 No.1

A new spectropotometric determination of citric acid was examined using carbonyldiimidazole (CDI) which has been used in petide synthesis. CDI was reacted with citric acid to form yellow acyl-imidazole derivative (λ??443nm) in dichloroethane. This colored reaction was so characteristic with tricarboxylic acid that can be used selective determination of citric acid in common carboxylic acid. As increasing the reaction temperature, the acyl compound was decomposed to produce the substance of which physical property was similar to the hydrolized compound. Citric acied was calibrated in the range of 1-6μg/ml and the extinction coefficient of the acyl-imidazole compound was 28000 in this condition.

한열변증에 따른 중풍 환자의 제반특성 비교

김민경,이인환,신애숙,김나희,김혜미,심소라,나병조,조승연,박성욱,정우상,문상관,박정미,고창남,조기호,김영석,배형섭,Kim, Min-kyung,Lee, ln-whan,Shin, Ae-sook,Kim, Na-hee,Kim, Hye-mi,Shim, So-ra,Na, Byung-Jo,Cho, Seung-yeon,Park, Seong-uk,Jung, Woo Sang 대한중풍순환신경학회 2010 대한중풍.순환신경학회지 Vol.11 No.1

Object : This study was conducted as part of the national project to standardize stroke diagnosis in Korean medicine. In this study, we aimed to evaluate the characteristics of acute stroke between heat pattern group and cold pattern group. Methods : We recruited stroke patients from 5 universities(Kyung-Hee University oriental medical center, Kyung-Hee University East-West Neo medical center, Kyungwon university lncheon oriental medical center, Kyungwon university Songpa oriental medical center and DongGuk university llsan oriental medical center) from April, 2007 until February, 2010. We diagnosed them and selected 463 heat pattern patients and 182 cold pattern patients. Results : We find that the risk factor of smoking, alcohol, diet(prefer to meat) are more associated with the heat pattern group. On the other hand, inflammation history in recent 3 months and diet(prefer to sea food) are more associated with the cold pattern group. RBC, Hg, Hct, TG, CK and Cl are more related to the heat pattern group. CPT, total cholesterol and HDL are more related to the cold pattern group. Tae-eum type takes high distribution of the heat pattern group, and So-eum type takes high distribution of the cold pattern group. Conclusions : This study provides evidence that the heat pattern group have more risk factor than the cold pattern group.

헬륨 마이크로파 플라즈마 토치의 개발과 특성에 관한 연구

曺競鉉,朴勇男 한국교원대학교 환경과학연구소 2001 환경연구논문집 Vol.- No.6

MPT는 최근에 개발된 마이크로파 플라즈마로서 수용매에 강하다. 여러 가지의 변형된 형태의 MPT를 개발하여 구조에 따른 플라즈마의 방전되는 형태를 조사한 결과 이중관 토치는 플라즈마 기체를 적게 소모하여 쉽게 플라즈마가 형성되었으나 토치의 끝이 높은 온도에 견디지 못하고 쉽게 상했다. ICP토치와 같은 형태의 삼중관 토치에 석영관을 중심관으로 사용할 때 가장 안정되고 대칭적인 플라즈마를 형성할 수 있었다. 바탕선을 조사해 본 결과 He MPT는 대기 중으로 돌출되어 대기와 많이 혼합되고 질소에 의해 quenching되는 것으로 보여진다. Membrane desolvator를 탈용매화 장치로 사용하여 헬륨 MPT의 감도를 조사해 본 결과 아르곤 MPT와 비교할 때 대부분의 원소에 대헤 검출한계가 10배 이상 높았다. 그러나 여기 에너지가 높은 원소는 비교적 효율적으로 검출할 수 있었다. 헬륨 마이크로파 플라즈마는 적은 양의 플라즈마 기체만 필요하여(약 1.6L/min) 경제적이며 매우 안정된 형태를 보여주었다. 플라즈마의 분광특성을 조사한 결과 들뜸온도 4950 K, 전자 밀도 3.28×10^(14) cm^(-3)로 측정되었다. MPT, which bas been developed recently, is very tolerant to aqueous samples. Several types of MPT have been investigated and is found that the double concentric tube could sustain a stable plasma at a low plasma gas flow rate. However, the tip of torch is easily ruined. Triple concentric torch has shown the best stability and the plasma shape, much like that of ICP, especially when the central channel is quartz. The plasma is exposed and mixed with air as is suggested from the background spectrum, which leads to quenching of He MPT. Sensitivity of helium MPT equipped with a membrane desolvator has shown 10 times lower than that of Argon MPT for most of elements except for the ones with relatively high excitation energy. He MPT requires small plasma flow rate (about 1.6 L/min), stable and simple to use. Excitational temperature and electron number density measured are 4950 K and 3.28 × 10^(14) cm^(-3), respectively.

韓國産 植物中 Tannin分布에 關한 硏究

趙庚烈 대구효성 가톨릭 대학교 1975 연구논문집 Vol.16 No.1

On studying the paper chromatography of the extract from 10 kinds plants (Table 1.), it was found the paper chromatogram (Fig.1.) including 3 spots to 8 spots, and comparing with the reports of OSHIMA, NAKABAYSHI and NISHIDA, it was identified these substances as shown in Fig.1 at the area of spots and Rf values (Fig. 1 and Table 3). By this method it is summarized as follow: a. As shown in Fig. 1, both the pyrogallol type and the catechol type tannin were contained in plants. b. Sample No. VIII(Quercus aliena Blume var. pellucida Blume) contained the most tannic acid, as total % is 14.3%, and sample No. VII, IV, contained comparatively much tannic acid. c. The plants shown in sample No. V, VI, VII, VIII are abundant in Korea because of its latitude and climate condition.

Ferric Ammonium Sulfate에 依한 Tannic Acid의 定量에 關한 硏究

趙庚烈 대구효성가톨릭대학교 1974 연구논문집 Vol.14 No.1

The study on tannic acid colirimetric determination was attempted with ferric ammonium sulfate. Concentration of tannic acid, then used, was 3.1×10-4M.∼1.2×10-3M., and that of ferric ammonium sulfate 2.0×10-4%. The two 325㎛ and580㎛ peaks apperaed on absorption curve, and the former was used, in this determination. The caribration curve was drawn at about pH value 3.7, and 325㎛. The analytical method mentioned above was applied to a number of cases, and was found comparatively good result.

鹽酸과 鹽化암몬이 黃化砒素 沈澱에 미치는 影響

趙慶烈 대구효성가톨릭대학교 1972 연구논문집 Vol.10 No.1

Ⅰ. According to Noyes-Swift method, As? is qualitatively analyzed from cation groupⅡ, and arsenic trisulfide is precipitated by hydrogen sulfide gas at 1% hydrochloric acid acidity. The arsenic trisulfide precipitation easily peptizes through filtration; to prevent this peptization, 5% ammonium chloride usually applied. Ⅱ. The author has experimented with 8 differential hydrochloric acid concentrations and 6 differential ammonium chloride concentrations, and obtained the following results. a. By use of 5%(7.17) hydrochloric acid acidity obtained the favorable result in the reaction solution. b, 3% ammonium chloride of washing solution brought better result than 5% ammonium chloride. c. In ordinary analysis 1%~5% hydrochloric acid acidity and 3%~5% ammonium chloride washing solution can be applied.

Volhard間接法으로 鹽素이온 定量時 Nitrobenzene添加의 再考察

趙庚烈 대구효성가톨릭대학교 1967 연구논문집 Vol.1967 No.2

In the precipitation titration, the indirect method of Volhard has been commonly adopted in the determination of chlorine ion. This method has been extensively employed by the Korean Pharmacopoeia in the determination of chloride compound. Since silver chiloride is more soluble than silver thiocyanate, silver chloride is removed by filtration, and the excess silver nitrate is back titrated with ammonium thiocyanate. Later, Caldwell modified this process by adding a small amount of nitrobenzene to the suspension. In order to search for better reagent than nitrobenzene, the author tested five different organic substances, nitrobenzene, benzene, ethyl ether, pertroleum ether and carbon teatrachloide. It was found that petroleum ether is most effective in coating silver chiloride. The effect of carbon tetrachloride and benzene are shown to be similar to that of nitrobenzene.

주걱송편버섯(Pycnoporus cinnabarinus) SCH-3의 Laccase 생산에 미치는 유도원의 영향

조경언,이현수,윤경하 순천향대학교 기초과학연구소 2004 순천향자연과학연구 논문집 Vol.10 No.2

This study was performed to examine the effect of inducer on laccase production of Pycnoporus cinnabarinus SCH-3 isolated from Korea. The different inducers including 2,5-xylidine were added in the culture of Pycnoporus cinnabarinus SCH-r respectively. 2,5xylidine was predominant of the inducers tested in laccase production. Addition of 2,5-xylidine enhanced 12-fold laccase production, While nothing of inducers produced isoenzyme of laccase, as determined by non-denaturing polyacrylamide gel electrophoresis.

溶媒가 指示藥感度에 주는 影響 : Acid-base indicator Ⅰ 酸.鹽基指示藥 Ⅰ

趙庚烈 대구효성카톨릭대학 1971 연구논문집 Vol.8 No.1

The following results were obtained from the experiment to determine the effect of solvent to indicator sensitivity. (1) Non-water-soluble sample does not apply to the Kolthoff theory. (2) Methanol can not be used as solvent in neutralization titration with phenolphthalein indicator. (3) Te reduce error to the maximum degree, ethanol should be used as solvent at the minimum amount. (4) Alcohol interferes with the dissociation of phenolphthatein. (5) For the detemination of Aspirin, it is advised that alcohol should not be used as solvent.

유압 윈치 CLD시스템의 제어

조중선,정경욱 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-

Control of an electro-hydraulic servo-controlled winch system which has no distinct performance specifications is investigated in this paper. Because of the lack of the performance specification, the research is focused to finding effective parameters which give clear physical meanings for the behavior of the system. Two new parameters named "settling rotation angle" and "settling safety ratio" are proposed for the control of general winch system. The physical meanings of the two parameters are explained precisely. Performance specifications for the target winch system are derived by using the proposed two parameters and a controller is designed to meet the performance specifications. Simulation results show that the designed controller gives responses which can be accepted for the target winch system. The concepts of the new design parameters proposed in this paper can be applied to any kind of servo-controlled winch systems.