Eethyl benezylidencyanoacetate 유도체에 대한 thiophenol 첨가 반응의 속도론적 연구

朴茂淳,金文執,崔元植,黃善岩,孟柱煬 순천향대학교 1991 논문집 Vol.14 No.1

Reaction of benzaldehyde derivatives with ethylacetate afforded ethylbenzylidenecyanoacetate. Especially, the crystal structure of ethyl p-methoxybenzylidenecyanoacetate were demonstrated by X-ray diffrection method. The crystal structure is only exist in E-form. The kinetic studies on the mechanism of nucleophilic addition of thiophenol to ethyl benzylidenecyanoacetate have been investigated by UV-spectrophotomery and the rate equation which can be applied over wide pH range was obtained. From the rate equation, effect of generalbase and substituent, the fellowing reaction proposed. Below pH 3.0, thiophenol added to the double bond, while above pH9.0 thiophenoxide ion added to the double bond. In the range of pH from 3.0 to 9.0, these reaction occurred competitively.

3-Phenyl-1-(2-furyl)propenone의 반응에 관한 이론적 연구

박해윤,맹주양 순천향대학교 1994 논문집 Vol.17 No.3

3-Phenyl-l-(2-furyl) propenone Was prepared by the condensation reactions of acetylfuran with benzaldehyde. The reactivity of 3-phenyl-l- (2-furyl) propenone has been studied by CNDO calculation for electrostatic potential energy surface, electric charge, geometric parameters in the molecular system. The calculated electric charge of b-carbon of 3-phenyl-l-(2-furyl) propenone is positive (0.055). The change in the electronic spectra of 3-phenyl-l- (2-furyl) propenone appear isosbestic point for hydrolysis. The nucleophilic adduct which was prepared by the reaction of 3-phenyl-l-(2-furyl) propenone was 3-phenyl-l- (2-furyl) -3-thiophenylpropanone. From the results, the reaction mechanism was proposed 1,4-Michael type addition reaction of 3-phenyl-l-(2-furyl) propenone with nucleophile.

B2B 환경 제조업의 공급업체에 대한 SCM 구축

양광모,류도희,박주식,강경식 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

Today's environment of enterprise is changing. They have to face customers' demands with the right product, the right service and supply them at the right time. And also cut down logistics and inventory cost and bring up the profit as much as they can. This means the change of petting enterprise first in importance to putting customer first in importance. therefore to correspond to customer's demand, shorting lead time is becoming a essential condition. The answer to this changes of environment is supply chain management. In this study, we use Goldratt's drum-buffer-rope scheduling in between manufacturer and supplier. And when shortage of inventory occur, search for the supply chain's CCR. Pressing CCR leer more production, and supply inventory from logistic center to guide for inventory buffing. using logistic warehouse between manufacturer and supplier, can execute function of buffer.

본태성 고혈압이 동반된 당뇨병환자의 혈중 인슐린 농도

양동호,홍세용,성기범,안무영,윤신구,박형국,양광익,황주호,신현길 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.1

Multiple lines of evidence link elevated blood pressure with diabetes mellitus. Specifically, it has been proposed that resistance to insulin-stimulated glucose uptake and hyperinsulinemia may play a central role in the cause and clinical course of hypertension. In diabetes mellitus, insulin resistance and/or hyperinsulinemia is an common finding and it is interesting whether the hyperinsulinemia may play a signigicant role in hypertension with DM in the same way as in essential hypertension without diabetes mellitus. The object of this study was to compare insulin and c-peptide levels between age, sex, and obesity matched two groups(DM with DM without hypertension). Method The study group consisted of 55 male diabetes mellitus patients, aged between 45-55 (years). Patients with obesity (body mass index · 30 ㎏/m2), renal disease (proteinuria · 300 ㎎/24hr urine), and secondary hypertension were excluded. Insulin and c-peptide were measured in overnight fasting state and after oral administration of glucose(75 gm). In the fasting, venous plasma glucose levels were similar in the hypertensive and control group(132 ±7 ㎎/dl vs 135 ±8 ㎎/dl). In the fasting, venous plasma insulin levels were higher in the hypertensive than in the control group (10.9 ±5.3 μIU/ml vs 5.5 ±3.9 μIU/ml, p = 0.0001). After loading with 75 gm glucose, venous plasma insulin level seems to be higher in the hypertensive patients than in the control patients, but the difference was not signigicant statistically (27.2 ±17.5 μIU/ml vs 19.9 ±18.9 μIU/ml, p = 0.1297). The mean insulin concentration of the essential hypertensive patients with diabetes mellitus was twice that of the normotensive patients with diabetes mellitus. In control group, there was a direct relations between insulin level and c-peptide, in both fasting state (R = 0.617, p = 0.0001) and glucose-loaded state (R = 0.531, p = 0.001). But in hypertensive group, there was no relations between insulin level and c-peptide, in both fasting state (R = 0.257, p = 0.2738) and glucose-loaded state (R = 0.307, p = 0.1885).

순음의 위상차를 이용한 스테레오 시스템에서의 음상 정위 특성 연구

박영민,박양우,장주석 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

In the AV system, stereophonic system has been studied to produce a realistic sound effect. The width of stereo AV system speakers is narrow, to have the spatial impression of sound effect, widening the sound image is necessary. The direction of sound image depends on the phase delay and the sound pressure level difference between two channels. In this paper, we analyze the relationship between the phase delay and the direction of the sound image relating to the frequency of sound source. Also we experimented to directionally localize the sound image of the pure tone with shifting phases and controling sound pressure level between two channels when the sound is reproduced by two speakers to make a spatial impression of sound effect.

코일형 곡관에서 층류맥동유동의 압력분포

박우룡,모양우,최주호,유영태 順天大學校 1992 論文集 Vol.11 No.1

The characteristic of the pressure distributions are studied theoretically and experimentally for the laminar steady flow and the laminar pulsating flow generated by the butterfly valve in the coiled pipes with the curvature ratios of 7 and 30. The pressure gredient ratios affact with Wormersley numbers, Dean numbers, velocity amplitude ratios and time averaged Reynolds numbers. The pressure gredient ratios of oscillatory components increase according to increasing the Wormersley number and the velocity amplitude ratio.

중소기업 효율성 향상을 위한 품질정보시스템 (Quality Information System) 개발

양광모,전현정,박주식,강경식 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - The biggest difficulty the small and small business currently face is not to have the effective operation of management system that is the computerization of management, and the problem is the small and medium-sized company can not afford the expenses caused by maintaining and operating such huge man-powers and facilities. Therefore, in this study, we try to develope the Quality Information System allowing the effective outflow and management of information through the availability lf viewing and managing the information by the level by menas of setting the log-in levels for the operation of information, easy revision or medification in the changed structure and new assignment made and followed by the modularization of program. For the accomplishment of above purpose, the material coding work or process allowing the easy classification of materials by emplyees of the company through the in-house standardization of material classifying standard is the foundation for the fast data processing so, it must be achieved first. And also, the purpose of this study is for inducement of the production management and quality control operated by companies to the computerization and automation, and we try to develop the DB Design allowing the realtime monitoring the ordered quantity to quantity to be delivered and output through a unit of PC and the increased consequence with the other works by monitoring the output at the site through the central PC instead of the system monitoring the output at the site by the manager for accomplishment of this purpose.

영아 천식의 임상적 고찰 : Asthma prospective score에 의한 Based on Asthma Prospective Score

양은석,노영일,문경래,박영봉,박상기,변주남 조선대학교 부설 의학연구소 1999 The Medical Journal of Chosun University Vol.24 No.1

A Clinical study was made on 40 patients for infantile asthma less than 2 years old who had been admitted to the Department of Pediatrics of Chosun University Hospital from January 1997 to December 1998. We evaluated family history of allergic diseases, clinical features, serum IgE level, eosinophilia, chest radiologic findings and response to bronchodilator. The results obtained were as follows ; 1) The male to female ratio of patients studied was 4 : 1. 2) Eighteen of the 40 patients (45.0%) had a family history of allergic diseases, of which 10 patients had maternal allergic diseases. 3) Atopic dermatitis was the most common disease (37.5%) among the associated allergic diseases. 4) Thirty two of the 40 patients (80.0%) showed high serum total 19E levels. 5) Only 5 of the 20 patients who were examined by MAST showed positive reaction. 6) The frequency of chest radiologic findings observed in these patients was as follows ; hyperinflation (52.5%), increased bronchovascular marking(30.0%), no pathologic findings(25.0%), and pneumonic infiltration(25.0%). 7) In response to bronchodilator 28 cases(70.0%) were effective. 8) When we divided the 40 patients into two groups by the diagnostic criteria of Asthma prospective score (AP score), 30 patients(75.0%) were included in a compatible group. On the basis of AP score, family history of major or minor allergic dieases and the responsiveness to bronchodilator were important factors for the diagnosis of asthma.

뇌하수체 부위의 결핵성 뇌농양 : 증례 보고1예 A Case Report

박수영,박순필,김상진,도종웅,주양자 대한신경외과학회 1988 Journal of Korean neurosurgical society Vol.17 No.1

The authors described a case of tuberculous brain abscess, located on the sellar area with an episode of tuberculous meningitis on the past history. Tuberculous brain abscess, encapsulated collection of pus, is quite rare. Especially, occurrence around the sellar area is extremely rare. On brain CT scan, tuberculous brain abscess on sellar region was differented from pituitary adenoma, craniopharyngioma, germinoma, pyogenic brain abscess, etc. The history of previous tuberculous meningitis was meaningful for the diagnosis of our case. So, we have reported this case with review of the articles.

매립지 복토재로의 재활용을 위한 하수슬러지의 부산석회계 고화재를 이용한 안정화 연구

박태욱,박주양 한양대학교 환경공학연구소 2000 環境科學論文集 Vol.21 No.-

하수처리 과정에서 필연적으로 발생하는 하수슬러지를 부산석회를 혼합하여 개발한 새로운 고화재로 무기화학적으로 처리하여 쓰레기 매립장의 복토재 및 일반 매립재로서의 재활용가능성에 대하여 검토를 하였다. 기존 사용되는 석회계 재료의 단점을 보완하여 보다 경제적이고 안정적인 재료를 개발하였으며, 개발된 고화재에 대하여 고화재 자체 및 혼합개량체에 대하여 여러시험을 실시하였다. 하수슬러지와 혼합하여 개량하고 개량된 인공토의 물성변화 및 역학적특성을 분석 검토하고, 화학적 용출시험을 병행하였다. 시험결과를 복토재료의 시방기준과 규격을 비교하여 재활용 가능성을 검토한 결과 재활용가능한 것으로 분석되었다. A feasibility study was made for recycling sewage treatment sludges into daily cover materials for municipal waste landfills or reclamation fill materials after treament using new stabilization/ solidification binder based on by-product lime from a soda ash producing plant. The new binder was more economical and more stable than the existing lime-based stabilization binder. Various physical and chemical leaching tests were made for raw sewage sludge, new binder material, and sewage sledge treated by the new binder. The treated sewage sludge was concluded to be suitable fur the daily cover material by comparing the test results with required specifications.