글래스비드 방법과 분말프레스 방법을 이용한 지르코니아 분말시편의 반정량 엑스선형광분석

강종봉,조범래,양성구 경남대학교 신소재연구소 1999 論文集 Vol.11 No.-

XRF는 시편의 종류에 따라 벌크, 분말 등 여러 가지 형태의 시료를 간단한 전처리 조작에 의해 빠른 시간에 분석할 수 있다는 장점으로 파인세라믹스의 원소분석으로 이용되고 있다. 그러나 시편들의 전처리 방법에 따라 분석의 결과가 달리 나타나고 있어, 본 실험험에서는 분말프페스형 시편과 글래스비드형 시편에서의 분석결과 차이를 밝히고자 하였으며, 분석결과에 미치는 영향들을 살펴보고자 하였다. 글래스비드형 시편인 경우 첨가하는 10배 이상의 플럭스 때문에 측정시편에 포함된 실제 분석하고자하는 시료의 양이 적어 오차의 범위가 크게 나타났다. 미량원소의 분석일 경우 글래스비드형 시편이 분말프레스형 시편의 시편보다 측정결과에서 많은 오차를 나타낸다. 이것은 X-선이 조사되는 영역에서 실제 시편내의 시료의 양이 미량 원소 분석의 오차를 나타냄을 알 수 있었다. XRF(X-ray Fluorescence Spectrometer) is one of the element analyzing instruments. which can be used to analyze ceramic materials of bulk, powder and various forms. The advantage of XRF is rapid analysis of elements in ceramics with simple sample preparation. In this study, the difference in results between pressed powder method and glass bead method were evaluated and the effects of sample preparation the final results were examined. The flux included in glass bead method, which is more than 10 times of samples, affected the final analyzing result. Trace element analysis in XRF could be affected by the sample amount because the region of X-ray beam is related the sample amount.

DSC를 이용한 인듐, 주석, 아연의 열물성 측정 시 승온속도와 분위기의 영향

강종봉,조범래,하영훈 경남대학교 신소재연구소 1999 論文集 Vol.11 No.-

시차주사열량계(DSC)를 이용하여 인듐, 주석, 아연의 융점과 용율열의 차이를 조사하였다. 승온속도는 5, 10, 그리고 20℃/min으로 하였고, 분위기 가스로는 아르곤, 질소, 그리고 건조공기를 사용하였다. 인듐의 경우는 융점은 질소와 공기 분위기에서 5℃/min의 승온속도에서, 용융열은 20℃/min의 승온속도에서 아르곤 분위기에서 문헌 값과 유사하게 나타났다. 주석의 경우는 융점과 용융열이 5℃/min의 승온속도에서 공기 중 분위기에서 문헌값과 유사했다. 아연의 경우는 융점은 5℃/min의 승온속도에서 공기 중 분위기였고, 용융열은 10℃/min에서 아르곤 분위기에서 유사하게 나타났다. 이 실험에서는 승온속도가 증가할수록 융점이 증가하는 것으로 나타났고, 분위기보다는 승온속도에 더 영향을 받는 것으로 나타났다. Indium, Tin, and Zinc were used to investigate the differences of the melting point and heat of fusion by the Differential Scanning Calorimeter (DSC). The heating rates were 5. 10, and 20℃/min, and the purging gases were Ar, N₂. and Air. The best results comparing to reference were obtained at the following conditions: for T_{m} of Indium, 5℃/min heating rate in N2 and Air atmosphere. for AH of Indium, 20℃/min heating rate in Ar: for T_{m} and AH of Tin. 5℃/min heating rate in Air atmosphere: for T_{m}, of Zinc, 5℃/min heating rate in Air atmosphere. for ΔH of Zinc. 10℃/min heating rate in Ar. In this study, as the heating rate increased. the melting point increased all samples. The melting point and heat of fusion were more influenced by the heating rate rather than by purging gas for all samples.

엔로플록사신 액제의 닭유래 병원세균에 대한 시험관내 항균효과 시험

윤효인,박병권,조준형,정상희,박경환,장범수,김종춘,황윤환,임종환,이내경,박승춘 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

In this study the antimicrobial spectrum and sensitivity of a liquid formulation of enrofloxacin against the major six pathogenic bacteria isolated from the diseased poultry in Korea were evaluated in comparison with ciprfloxacin (CFX), gentamicin (GM) and penicillin (PC). A liquid form of enrofloxacin, a test material and ciprofloxacin showed at least 83% antibacterial activity against all of six test pathogenic microorganisms at the fixed concentration of 10 ㎍/㎖. Gentamicin and penicillin revealed much lower antibacterial activity at the same condition. We evaluated the liquid form of enrofloxacin as having widespread antibacterial spectrum against poultry infections. The liquid form of enrofloxacin showed potent antibacterial activity, with the MIC range being 0.12∼2 ㎍/㎖ against Gram positives, 0.06∼2 ㎍/㎖ against Gram negatives and 0.5∼2 ㎍/㎖ against Mycoplasma spp. These values were equivalent to or somewhat higher than those of ciprofloxacin, but much lower than those of gentamicn and penicillin. This new liquid form of enrofloxacin would find its way in application of mixing with drinking water for the prevention and treatment of diverse infections in chickens.

엔로플록사신 액제의 닭 호흡기 및 소화기 감염증에 대한 예방 및 치료효과

윤효인,박병권,조준형,정상희,박경환,장범수,김종춘,황윤환,임종환,이내경,박승춘 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

We evaluated the efficacy of the liquid form of enrofloxacin against poultry respiratory and digestive infections, the major problems in the poultry industry, from diverse diagnosis viewpoints. Results obtained through this study were as follows: 1. The liquid form of enrofloxacin showed good acceptability to poultry owing to no abhorrence to the drug by chickens, which indicated its suitability for mixing in drinking water. 2. The application of the enrofloxacin formulation improved the productivity of the chicken farm to a great extent by lowering the death toll of chicken raised in the farm. 3. The use of the drug shortened the days to the market, and increased the body weight at the time of marketing. 4. Preventive and therapeutic effects of the liquid enrofloxacin were observed higher than ampicillin, a major antibiotic used in poultry farming. From above results, the liquid form of enrofloxacin would find its use for the prevention and treatment of digestive and respiratory infections, let alone the growth promotion and feed efficiency, especially in the chicken farming practice.

논문 / 반응소결된 다공성 뮬라이트의 미세구조 제어

조범래(Bum Rae Cho),윤상렬(Sang Ryul Yoon),강종봉(Jong Bong Kang) 한국복합재료학회 2000 Composites research Vol.13 No.5

기능과 품질에 기반한 침입탐지시스템의 평가를 위한 실험 데이터 패턴 생성

조범래(Bum-Rae Cho),김종(Jong Kim),홍원기(Won-Ki Hong) 한국정보과학회 영남지부 2001 한국정보과학회 영남지부 학술발표논문집 Vol.9 No.1

나로호 발사체 1차 비행시험에서의 궤적 및 자세 분석

노웅래(Woong-Rae Roh),조상범(Sang-Bum Cho),고정환(Jeong-Hwan Ko),선병찬(Byung-Chan Sun),김정용(Jeong-Yong Kim),박정주(Jeong-Joo Park),조광래(Gwang-Rae Cho) 한국항공우주학회 2010 韓國航空宇宙學會誌 Vol.38 No.3

본 논문에서는 나로호 발사체의 1차 비행시험에서 얻은 데이터를 바탕으로 발사체의 비행시험에서의 궤적 및 성능, 자세 제어에 대한 분석을 수행하였다. 나로호의 1차 비행시험에서는 페어링의 비정상 분리 문제가 발생하였으며, 이에 따라 위성의 궤도 투입이 실패하였다. 본 논문에서는 이러한 페어링 비정상 문제를 고려하여, 궤적 및 비행 성능, 자세제어 특성을 분석하였다. 또한 관성항법유도시스템의 비행 결과 및 성능 분석도 제시되었다. 비행후 분석 결과 페어링 분리 문제 이외에 다른 문제는 발생하지 않았으며, 다른 탑재 시스템들이 정상적으로 작동하였다. This paper presents the analysis results of trajectory, performance and attitude control based on the first flight data of the KSLV-I. The KSLV-I had a fairing separation problem and failed to inject spacecraft into the orbit. In this paper, the trajectory, flight performance, and attitude control was analyzed considering the influence of unseparated fairing. Moreover, the flight results and performance of the inertial navigation and guidance system were presented. As a results of post-flight analysis, any other problem besides the fairing separation problem was not happened and onboard equipment functioned normally.

정상 한국 성인에서 혈청 총콜레스테롤 및 중성지방치

조재화,남문석,이은직,오세창,김경래,임승길,이현철,허갑범,이상인,이관우 한국지질학회 1994 韓國脂質學會誌 Vol.4 No.2

The purpose of this study was to examine the level of serum total cholesterol and triglyceride of healthy Korean adults and the correlation between these serum lipid levels and other metabolic or anthropometric parameters. Measurement of percent ideal body weight(PIBW), body mass index (BMI), blood pressure, serum total cholesterol, triglyceride, blood glucose and hepatic and renal fuctional test were made to each of 8,208 healthy adults; 4,380 males and 3828 females. The mean serum total cholesterol and triglyceride were 185.2±36.0㎎/㎗ and 112.9±64.4㎎/㎗ respectively. Serum total cholesterol and triglyceride showed a gradual increase with age in both sex upto sixth decade. The percent increases in serum cholesterol and triglyceride levels of females after sixth decade were much greater than those of male. The serum total cholesterol showed a normal distribution curve but the serum triglyceride showed a skewed curve. The serum total cholesterol levels had positive correlation with age, PIBW, BMI and blood pressure. The serum triglyceride had positive correlation with PIBW, BMI, age and blood pressure.

Amylodextrin과 Acrylonitrile 및 Styrene의 Graft共重合

趙慶來,張貞戴,朴鍾範 新羅大學校 1991 論文集 Vol.31 No.1

Graft copolymerization of acrylonitrile(AN) and styrene(Sty)onto amylodextrin(AD) was carried out using ceric ammonium nitrate(CAN) as initiator under a variety of condition. The graft efficiency of PSty-AD increased by increasing CAN concentration from 0.001mol/1 to 0.0028mol/1, however, at higher CAN concentration(i.e., up to 0.004mol/1.) it decreased. In case of PAN-AD, the efficiency increased with increase in CAN concentration even at higher level. Increasing the AN concentration from 1% to 8% caused a significant enhancement in grafting. The same held true for raising the copolymerization temperature within the range of 25℃-50℃. The graft efficiency of PAN-AD increased by increasing AN concentration, while that of PSty-AD only increased by increasing Sty concentration from 0.5mol/1 to 3.0mol/1. The grafting reaction proceeded initially at a fast rate and decreased with time. The grafted polymers showed increased crystallinity and much lower water solubility as compared with AD. Furthermore the grafted polymers showed no reaction with iodine tincture

특발성 부갑상선기능저하증 1예

조준구,이현철,김현만,임승길,김경래,허갑범 최신의학사 1985 最新醫學 Vol.28 No.10