國産染科 染色加工에 關한 硏究(1)

朴炳基 全北大學校 1973 論文集 Vol.15 No.-

In order to study dyeing shade by domestic dyestuff, two kinds of domestic dyestuffs as Nylon Fast Black 3B and Nylon Fast Black G, have been performed. The obtained results may be summarized as follows: 1. As the absorbing capacity of Nylon for Nylon Fast dyestuff, not only is the total amount of dye absorbed influenced by the amount of acid, but the rate of exhaustion is also dependent upon acidity. 2. Absorption rate of acid dyes is influenced to a great extent by temprature, it must be dyed above 40℃. 3. Neutral bath method lead to significant differences in the dyed Nylon fabric, but acid bath method lead to little differences by the same dyestuff. 4. As the same dyestuff, we found out exchange of color shade was made according to the kinds of acid, pH range, dyeing methods. We noticed that Nylon fabric has been well dyed in heavy shade using strong acid with acid dyestuff. 5. There is no significant differences for Color-fastness of dyed goods according to the kinds of acid.

A Study of Finishing Conditions influencing Spandex Quality

( Pyong Ki Park,Young Gyun Kim ) 한국품질경영학회 1984 품질경영학회지 Vol.12 No.1

A Study of Finishing Conditions influencing Spandex Quality

Park, Pyong Ki,Kim, Young Gyun The Korean Society for Quality Management 1984 품질경영학회지 Vol.12 No.1

스판덱스 섬유는 신축성 섬유로서 착용감이 좋기때문에 스포츠웨어나 편물에 많이 이용되고 있으며 화학적으로 폴리아미드 조성과 비슷하나 주 사슬속에 산소원자를 포함하고 있어서 유연하며 융점이 낮다. 스판덱스 섬유에 대한 연구동향은 구조에 관한것, 물성에 관한것, 편성에 관한것, 염색가공에 관한것, 등으로 대별할 수 있으나 가공조건에 따른 물성변화를 검토한 것은 별무하다. 따라서 스판덱스 섬유의 가공시와 유사한 조건을 부여하고, 영향을 미칠 것으로 예상되는 인자 즉 강도, 신도, 수축율, 피로도에 대한 통계적 검정을 통하여 영향력을 확인했고, 반응 방정식을 유도했다. 이 보문은 본 학회지 Vol.9,No1 에 게재한 "스판덱스 섬유의 염색조건이 섬유품질에 미치는 영향" 을 정리 영문 번역한 것이다. Spandex is a elastomeric fiber in which the-fiber-forming substance is a long chain polymer consisting of at least 85% segmented polyurethane. In the polyurethanes there are the additional oxygen atoms in the main chains of the molecule. The effect of these oxygen atoms is to make the molecule flexible. From a physical point of view, elasicity and recovery from stretch are the most important properties of polyurethane, so its use had now expanded into many knitting industry. In this paper, we wish to Test the effect of some finishing conditions on the quality of polyurethane.

저온 플라즈마 및 Sputter Etching 처리에 의한 염색직물의 심색화 가공

박병기(Pyong Ki Park),이문철(Mun Cheul Lee),박건용(Geon Yong Park) 한국염색가공학회 1996 韓國染色加工學會誌 Vol.8 No.2

산화억제제를 첨가한 일방향 탄소 / 탄소 복합재료의 물성

박수진,이재락,박병기,조민석 한국공업화학회 1998 응용화학 Vol.2 No.1

Ultimate objective of this research is to develop polymer composite materials having high mechanical performance at high application temperatures. The study on oxidation reaction inhibition for the prediction of C/C composites working life in oxidizing environments is one of the primary concerns for the prediction of composite behaviors, together with a study of thermal and mechanical properties. On the other hand, silicides like MoSi₂ may be more suitable for this application, as these materials have high melting point (>2300K) and excellent oxidation resistance. In addition these materials becomes ductile above its brittle-to-ductile transition (BDT) temperature of 900℃, leading to the high mechanical performance at high application temperatures. In their real applications, this is to provide understanding the effects of oxidation inhibitors on the oxidation reaction and thermal resistance properties at high temperatures.

相對濕度와 綿纖維의 濕潤回得率에 關한 硏究

朴炳基,李鐘文 全北大學校 1974 論文集 Vol.16 No.-

Relative Humidity is the term used to describe the moisture existing in the atmosphere. And most Textile fibres are Hygroscopic ; so they have the ability to absorb or give up moisture. If the relative amount of moisture in air is greater than in textile material, this moisture is absorbed by Hygroscopic textile material ; if the relative amount of moisture in air less than in material, the moisture will be give up by the material. These changes are due to differences between the vapour pressure of atmosphere and material. For any given Humidity, the moisture regain will be higher for desorption than absorption. The relationship between the moisture regain of cotton and relative humidity of the atmosphere is of fundamemental importance in study of the structure of cellulose, the subject also of practical importance in textile processing and physical properties of cotton fibre. Relative humidity is the ratio of the weight of the existing vapour to that of the maximum weight of vapour which the space could contain at the same temperature explessed as a %. To make a determination of Relative Humidity with the use of the wet and dry bulb Hygrometer. Charts have been prepared for converting the reading of wet and dry bulb. Moisture Regain is the % weight of moisture based on the oven-dry weight of the material. The Regain of a material is considered to be the amount of moisture at the time of test. Samples of yarn were conditioned in desiccators in which the R.H was maintained at different levels by means of solutions of acid of known concentration. The yarn was in the form of leas and equilibrium regain % was determined in a Brabender Semi-automatic tester. The result of study may be summarized as follows 1. The moisture regain at a given relative humidity was found to decrease with an increase in dry-bulb temperature. 2. Na_2CO_3 boiled cotton was found to take up less water when absorbing moisture. 3. Moisture Regain was found to depend also on the previous heat treatment, previous heating to a high temperature reading the capacity of the material to absorb water. 4. For any given humidity, the moisture regain will be high for desorptin ; the phenomenon known as "hysteresis". 5. The effect of temperature on moisture regain was found to be greater at temperatures above about 93℃.

방향족화합물이 함유된 폐수의 생물학적 처리

박춘호,김용기,오평수 한국산업미생물학회 1991 한국미생물·생명공학회지 Vol.19 No.6

방향족화합물을 생분해하는 미생물을 분리하여 생물학적 처리에 응용하기 위해 폐수 및 토양에서 150종의 균을 분리하였다. 그 중에서 COD 제거율과 방향족화합물의 이용능이 가장 우수한 HC107균을 선발하여 Pseudomonas sp.로 동정하였다. 활성슬러지 장치에서 Pseudomonas sp. HC107 배양액을 2㎖/day씩 처리하면서 화학, 제약 및 도료공장의 폐수를 혼합하여 연속처리한 결과 처리수의 COD, BOD 및 phenol 제거율이 평균 92.5%, 95.3% 및 93.5%로 나타났다. The bacteria which can biodegrade aromatic compounds were screened from soil and wastewater. The isolated Pseudomonas sp. HC107 had high removal rate of COD and phenol. And also thls strain grew on m-cresol, salicylate, toluene, 2,4-D and benzene. When the strain culture (2㎖/day) was treated on continuous reactor at mixed wastewater from chemical, pharmaceutical and dye industry, the treatment rate of COD, BOD and phenol was to be about 92.5%, 95.3% and 93.5%, respectively.

유지폐수의 생물학적 처리에 관한 연구

박춘호,김용기,유희종,오평수 한국산업미생물학회 1991 한국미생물·생명공학회지 Vol.19 No.1

유지함유폐수를 생물학적으로 처리할 목적으로 폐수 및 토양으로부터 45종의 균을 분리 동정하여, 그 중에서 COD 제거율과 유지제거율이 우수한 LW-27균을 선발 동종하였다. 동정결과 LW-27균은 Pseudomonas chlororapihis의 유연균으로 동정됐다. LW-27균의 제제화는 45℃에서 24시간 진공건조하여 82% 이상의 균 생존율을 얻어 제제화하였다. 제제된 LW-27을 0.1g씩 매일 활성슬러지장치에 처리하면서 혼합폐수를 연속 처리한 결과 처리수의 COD, BOD 및 n-헥산 추출물질농도의 제거율이 평균 92.9%, 94.8% 및 98.0%로 나타났다. The biodegradable bacteria for fats and oils were isolated from soil and wastewater. The isolated strain was designated as LW-27 which had high COD removal rate and biodegradability on fats and oils, and was identified as Pseudomonas chlororapihis. The cell viability of LW-27 which produced by vacuum drying at 45℃ for 24 hours was 82%. When the wastewater was mixed with LW-27 agent (0.1g/day) on the activated sludge unit, the removal rates of COD, BOD and n-hexane extract of the effluents were about 92.9%, 94.8% and 98.0%, respectively.

외상으로 인한 사망 환자의 임상적 통계학적 고찰

김기창,김창호,박희주,이문수,백무준,송옥평 대한외상학회 1996 大韓外傷學會誌 Vol.9 No.2

The studies on the statistics of emergency patients, who are increasing in number due to the increase in population and the development of modern materialistic civilization, may contribute to the minimization of mortality and morbidity of the patients requirring emergency treatment. The authors performed a retrospective review on the records of 183 mortality cases after the admission to the General surgery department via emergency room in Soon Chung Hyang University Chun An Hospital from June 1983 to December 1994. The studies on the analytical data about the sex, age, cause of trauma, the time interval between onset of urgent situation and arrival at emergency room, the length of the management at emergency room,the time interval before operation,amount of transfusion, A. S. A(American society of anesthesia) class, injured organ etc. will be very valuable references for the physicians and hospitals in such a rapidly changing society and may contribute to the advancement of the public welfare.

Adaptive Statistical Iterative Reconstruction 기법을 적용한 측두골 CT 검사의 선량 감소와 영상의 질에 대한 고찰

이기백(Ki Baek Lee),박상협(Sang Hyub Park),김선기(Sun Ki Kim),조평곤(Pyong Kon Cho) 대한CT영상기술학회 2011 대한CT영상기술학회지 Vol.13 No.2

목적 측두골 CT의 검사는 고해상력을 필요로 하기에 높은 선량과 Boneplus, Edge 알고리즘 등을 요구한다. 이러한 알고리즘은 영상의 가장자리 부분을 강조시키지만 상대적으로 노이즈가 높은 특성을 가지고 있다. 이에 본 연구는 선량을 적게 사용하면서 노이즈를 줄일 수 있는 반복적 재구성법을 적용시켜 그 유용성을 평가해 보았다. 대상 및 방법 연구에는 64채널 MDCT(GE LightSpeed VCT XTe, Waukesha, USA)가 사용되었다. 노이즈 측정은 workstaion을 사용해 측두골 검사의 동일한 부위에 표준편차(standard deviation)을 측정하였고 공간해상력을 측정하기 위해서 Victoreen사의 AAPM 팬텀(Model 76-410, Nuclear Associates LTD)으로 MTF(Modulation Transfer Function)을 측정하였다. 200 mA에 ASIR를 적용시킨 것과 기존 300mA를 적용시킨 측두골 검사를 비교해 선량와 알고리즘에 따른 노이즈, 공간해상력을 측정하였다. 결과 200mA 조건에 ASIR 적용하지 않았을 때와 ASIR 30 적용 시 동일 부위의 ROI를 비교해 보았더니 오른쪽(RT)의 표준편차(standard deviation)에서는 평균 20.4% 감소하였고 왼쪽(LT)에서는 평균 19.8% 감소하였다. 그리고 ASIR 적용하지 않았을 때와 ASIR 60 적용 시를 비교해 보면 RT에서 평균 40.6%, LT에서 39.9% 노이즈가 감소하였다. 또한 과거의 측두골 검사(300mAs 사용)의 SD가 평균 65.14일 때 120 kVp, 200 mAs의 스캔 조건에 ASIR 30의 적용시켰을 때의 영상 노이즈가 평균 66.13으로 가장 비슷하다는 것을 확인할 수 있었다. 200 mA, 300 mA에서 공간해상력(high contrast resolution)은 Boneplus 알고리즘 사용시 각각 평균 11.17과 11.16으로 standard 알고리즘 사용시 각각 6.77와 6.76으로 거의 비슷하였다. 결론 200 mA, 300 mA 조건에 따른 해상력(resolution)의 변화는 크게 나지는 않지만 노이즈는 상당한 차이가 났다. 이러한 상황에서 GE사의 ASIR의 적용은 노이즈를 줄이고 환자에게 적은 선량(200mA)으로 기존의 300mA를 사용한 영상과 비슷한 영상의 질을 유지할 수 있게 되었다. I. Purpose Temporal Bone CT needs high level of dose and algorithm of Boneplus, edge and so on. because it demands high contrast resolution. this algorithm emphasizes the edge region in image but relatively has plenty of noise character. thus, in this study, the usefulness was evaluated by using Iterative Reconstruction which can reduce dose and noise level. II. Meterial and Methods CT scans were performed with a 64-slice MDCT(GE LightSpeed VCT XTe, Waukesha, USA). Standard Deviation, 이하 SD) for Noise index were measured in same area of temporal bone CT exams by using workstation and for high contrast resolution, MTF(.Modulation Transfer Function) were measured by AAPM Phantom(Model 76-410, Nuclear Associates LTD, Victoreen, USA). according to different dose and algorithm, figures of Noise and High contrast resolution were compared with between protocol of 200 mA using ASIR(Adaptive Statistical Iterative Reconstrucion) and it of 300 mA. III. Result Compared with ROI(Region a Interest) of same size between 200 mA without ASIR and 200 mA with ASIR 30, SD of HU(Hounsfield Unit) was decreased to average 20.4% in Rf(Right) and 19.8% in LT(Left). between 200 mA without ASIR and with ASIR 60, it was reduced to average 40.6% in Rf and 39.9% in LT. also, there is no choice between SD(average 65.14) of prior temporal bone CT exam(usage of 300 mA) and SD(average 66.13) of exam using 200 mA with ASIR 30. high contrast resolution of 200 mA and 300 mA was averagely each 11.17 and 11.16 in Boneplus algorithm and each 6.77 and 6.76 in Standard algorithm there were incredibly similar. IV. Conclusions According to a different condition(200 mA versus 300 mA), fluctuations of resolution were not significantly different but those of noise had considerable gap. in this situation, to adapt ASIR made by GE can reduce noise to image. consequentially, this method can provide lower dose(200 mA) to patients than prior exams(300 mA) and balance similar image quality.