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황종식,상병인,유제강,이규현,민병렬,김병식 한국막학회 1994 멤브레인 Vol.4 No.4
정유산업 방출폐수를 재처리하여 양질의 공업용수로 활용하고자 역삼투막 및 공정으로 구성된 재활용 system을 고안하여 현장 pilot 실험을 수행하였다. 생산공정 운전상황에 따라 불규칙적으로 변하는 폐수 특성에도 불구하고 역삼투막의 경우 10~15kg/cm2 의 운전압력 범위내에서 96~99%정도의 비교적 높은 염배제율을 보였으며 본 실험을 통하여 얻은 재생수의 경우 냉각탑 공급용수로써의 충분한 가능성을 보여 주었다. 그러나 본 연구에서 제안 사용된 여과형 전처리 공정만으로는 충분한 처리효율을 기대하기 어려웠으며, 이는 각 여과공정법 처리수의 수질분석 결과 및 NaOH를 이용한 역삼투막 세정 결과로부터 쉽게 확인되었다. Reverse osmosis(R/O) pilot system, which consists of pretreatments and R/O membranes, was demonstrated to regenerate the petroleum refinery wastewater for the process feedwater supply. Despite of the unsteady quality of the wastewater effluent from the process facilities, relatively high salt rejection of 96~99% was obtained and the product water showed a feasible quality for the use of cooling tower feed water. The results of R/O membrane module cleaning with NaOH solution represented that there was some fouling effects on the membrane performance during the period of test due to the ineffective treatment processes proposed and used in this study.
감압증류에 의한 석유정제 상압잔사유와 폐윤활유의 혼합처리 및 공정모사
황종식,김형락,김명수 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.2
자동차용 내연기관에서 발생하는 폐윤활유를 석유정제 중질유분인 상압잔사유와 배합한 후 고비점 진증류 (TBP) 장치를 이용한 감압증류실험을 통해 재정제함으로써 폐유 내 존재하는 유해물질들의 제거효율을 평가하였다. 본 실험을 통해 고품질의 정제연료유분과 아스팔트를 얻었으며 폐유 내 중금속, 회분 그리고 잔류탄소분의 95% 이상이 감압잔사유쪽으로 제거되었다. 상압잔사유분에 대한 폐유의 혼합비율을 0-20%까지 변화시키면서 수행된 감압증류실험을 통해 폐유 혼합비가 증가함에 따라 정제연료유분의 수율 증가와 물성개선 효과가 입증되었다. 이러한 실험결과는 PRO II를 이용한 공정모사 결과 값과도 잘 일치된 결과를 보여주었다. The removal efficiency of the contaminated constituents existing in the waste automobile lube oils mixed with petroleum atmospheric residues during a re-refining process was investigated by a vacuum TBP distillation. The refined fuel oils and asphalts with higher qualities were obtained by this process and more than 95% of heavy metals, ash and carbon residue contents in the waste lube oils were eliminated to vacuum residues. The increased yield and improved quality of distilled products were identified in the range of 0-20% blending ratio of waste Tube oils to atmospheric residues. These experimental results showed the reasonable agreements with the calculated values provided by process simulation using PRO II.
탈착용 종아리 압박 기구 착용이 여자 대학생들의 등속성 운동 시 하지 근기능에 미치는 영향
류종식(Ryu, Jong-Sik),김차룡(Kim, Cha-Ryong),송남석(Song, Nam-Seok),김상영(Kim, Sang-Yeong),황강민(Hwang, Kang-Min),채원식(Chae, Won-Sik),김종근(Kim, Jong-Geun) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.6
The purpose of this study was to investigate the effect of muscular strength and muscle endurance on the isometric and isokinetic muscular strength of calf compression equipment. The subjects were selected among 18 college students who had no ankle related disorder among 20 subjects. All subjects measured ROM, maximum torque (Peak Torque), and total work of the ankle according to the presence or absence of the compression mechanism. Muscle strength test showed that the peak torque(Nm). Dorsi flexion was 33.41 ± 4.35Nm, 34.66 ± 4.45Nm, and plantar flexion was 120.94 ± 42.24Nm at the lower flexion, respectively, which was not significantly different from 123.97 ± 31.5Nm. Muscle endurance test showed that the total work(Nm). dorsi flexion was lowered from 82.22 ± 8.03Nm to 80.27 ± 7.93Nm, but there was no significant difference. On the other hand, plantar flexion was 237.05 ± 93.64 Nm and 255.94 ± 84.23 Nm, respectively (p<.05). These results suggest that wearing a calf compression equipment and dorsiflexion and flexion exercises will increase the range of static joint motion and improve strength and muscle endurance. In order to improve the ankle joint"s muscular function, Exercise seems to have a positive effect.
Liquid Sensing of a M-13 Bacteriophage-Based Colorimetric Sensor
문종식,최종완,황윤회,오진우 한국고분자학회 2018 Macromolecular Research Vol.26 No.9
Virus-based sensors using M-13 bacteriophages are considered as potentially useful techniques to detect harmful chemicals, such as endocrine disrupting chemicals and antibiotics. Despite their great potential, chemical detection using this color sensor is dependent entirely on gas phase samples. Here, a simple and rapid colorimetric sensor was fabricated using a genetically engineered M-13 bacteriophage for liquid detection. The hierarchical nanostructure with structural color can detect the target material with great sensitivity and selectivity. Liquid detection using a M-13 bacteriophage-based colorimetric sensor was performed to verify selectivity and sensitivity of the color sensor upon exposure to a liquid sample. Trinitrotoluene (TNT) was detected in ethanol solutions at concentrations as low as 40 pM, and 400 μM of three kinds of nitro-aromatic compounds could be identified using the M-13 bacteriophage- based colorimetric sensor. The liquid sensing technique described in this study may lead to the production of a viral color sensor for practical applications.