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박종명,황의경,김인천,이재진,정현규,강구환,Park, Jong-myung,Hwang, Eui-kyung,Kim, In-cheon,Rhee, Jae-chin,Chung, Hyun-kyu,Kang, Ku-hwan 대한수의학회 1998 大韓獸醫學會誌 Vol.38 No.1
Piglets' diarrhea is one of the major causes of economic loss in Korean swine industry. To prevent this serious and persistant problem, we have developed systemic farm evaluation and analysis program. The program consists of the checklist and the computerized program. The items of the checklist are selected on the basis of various causative factors related with the piglets' diarrhea including sanitational status, nutritional management, or farm environment. The checklist is composed of 30 items including 6 factors on facility, 8 factors on environment, 6 factors on nutrition and 10 factors on sanitation, respectively. Minimum 1 to maximum 10 points was assigned to each item depending on level or status of farm. The scores calculated by sum of points obtained from each item could find out the problems which the farm was confronted with. To investigate the applicability of a program 150 swine farms raising over 500 heads were selected from 7 provinces throughout the country and surveyed. There were significant correlations between the piglets' diarrhea and the scores of the checklist. Based on above results we revised the checklist which consisted of 22 items including 5 factors on facility, 7 factors on environment, 3 factors on nutrition and 7 factors on sanitation. After that we composed a computerized diagram out of each point of an item which showed and indicated weak factors to be improved promptly. Our present study suggested that this newly established swine farm evaluation program would be a very efficient way to find out the problems and support the systemic control program of the piglets' diarrhea for swine farms.
조직중의 잔류 diethylstilbestrol과 zeranol의 동시분석법에 관한 연구
Jong Myung Park(朴鍾鳴),In Cheon Kim(金仁千),Young Hwa Sim(沈暎和),Sang Hee Jeong(鄭詳憙),Sun Namgoong(南宮琁),Keun Sik Park(朴根植),Mun Han Lee(李文漢),Chang Up Lee(李昌業) 한국예방수의학회 1992 예방수의학회지 Vol.16 No.3
A simultaneous analysis method using GC/MS was developed to monitor residual DES and zeranol. The residues in tissues were determined by the method developed. The residues in tissues were homogenized with sodium acetate buffer, hydrolysed with β-glucuronidase and extracted with acetonitrile. Lipids in the extract were removed with dichloromethane, the solvent was evaporated and then the residues were redissolved in alcohol mixture. Sep-pak cartridge was applied for clean-up and the separated residues were derivatized using TMSI and BSTFA. The residues were determined by GC/MS with DB-5 column, helium as a carrier gas, electron impact ionization mode and TIC and SIM scan mode. The limit of detection was 1 ppb and the calibration curves showed good linearity.
GC/MS를 이용한 돼지고기중의 올라퀸독스 잔류분석에 관한 연구
Jong Myung Park(朴鍾鳴),In Cheon Kim(金仁千),Young Hwa Sim(沈暎和),Mun Han Lee(李文漢),Ki Poong Lee(李起豊) 한국예방수의학회 1993 예방수의학회지 Vol.17 No.1
The olaquindox is used as one of the growth-promoting feed additives in pig industry. To date its maximum residue limit in pork tissues is not established. The olaquindox exists in the body both as an intact form and metabolized form such as olaquindox-4-monoxide and desoxyolaquindox. For food safety and to establish the guideline for the safe use of the olaquindox, it was demanded to develop the new analysis methods to detect the olaquindox and its metabolits in tissues. In this study, olaquindox and its metabolites were extracted with acetonitrile from muscle, liver and kidney from olaquindox-fed pigs. The extracts were then reduced to desoxyolaquindox by using ferrous sulfate. Desoxyolaquindox was treated with bis (trimethylsilyl) trifluoroacetamide (BSTFA) to obtain the derivative for GC/MS analysis. The retention time of the derivative analyzed by GC/MS was about 13.9 minutes and monitored ion masses were 303, 200 and 143. The relative ion intensity ratio was 31 : 41 : 100. The recovery rate of the olaquindox from spiked pork tissues was ranged from 82.7 to 121.1%. The study revealed that this new analysis method was more accurate compared to the conventional method. It is suggested that thisnew analysis method may replace the conventional one.
랫트 및 돼지 체내에서 후라졸리돈의 환원대사에 관한 연구
Jong Myung Park(朴鍾鳴),Young Hwa Sim(沈暎和),In Cheon Kim(金仁千),Nam Seop Jin(鎭南燮),Mun Han Lee(李文漢) 한국예방수의학회 1995 예방수의학회지 Vol.19 No.1
The reductive metabolism of an antibacterial nitrofuran, furazolidone[N-(5-nitro-2-furfurylidene)-3-amino-2-oxazolidone] was investigated. E. coli rapidly metabolized furazolidone to the reduced cyano metabolite under aerobic condition. The major solvent-extractable metabolite produced under the aerobic incubation was isolated and analyzed by mass spectrometry. The mass spectra indicated that this metabolite was unequivocally identified as 3-(4-cyano-2-oxobutylideneamino)-2-oxazolidone, an end product of the reductive metabolism of the nitro group of furazolidone. When furazolidone was administered orally to rats and piglets, 3-(4-cyano-2-oxobutylideneamino)-2-oxazolidone was isolated and purified from the muscle, kidney and liver tissues according to the withdrawal time. These purified extracts were analyzed by high performance liquid chromatography(HPLC).
사회과에서 포트폴리오 기법을 통한 수행평가가 학생들의 학습태도 및 탐구기능에 미치는 영향
김인천,한상욱 순천대학교 과학교육연구소 2001 科學과 敎育 Vol.9 No.-
This study is to examine empirically whether the performance assessment through portfolio techniques affects the students’ learning attitudes and inquiry skills in social studies. For this study, 160 students of a girls’ academic high school were sampled and divided into two groups of the experimental group introducing portfolio techniques and the control group without the techniques. And the data of their learning attitudes and inquiry skills were analyzed by t-test. The results of the study show that there are significant differences between the experimental group and the control group. In conclusion, this study reveals that execution of the performance assessment through portfolio techniques in social studies is effective in all the sides of the students’ learning attitudes and inquiry skills.
김인천,나성웅 충남대학교 공업교육연구소 1995 論文集 Vol.18 No.1
In this paper, two efficient block motion estimation algorithms are presented. First, a new pixel decimation technique is introduced which selects a pixel with maximum deviated value from the subblock mean. The selected pixels well represent the characteristics of the image bolck such as edge and texture region. Using these pixels makes the pixel decimation technique more efficient than doing uniformly selected pixels. Simulation results show that the proposed method is superior in performance to the standard method and also that of Liu and Zaccarin. Second, a modified multistep search algorithm is presented of which first step is the comparision of the mean and the variance instead of the conventional searching. Simulation results show that the proposed method is slightly better in PSNR than the conventional multistep search algorithm with less computational complexity.