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김형진,이지영,권혁윤 한국공업화학회 2004 응용화학 Vol.8 No.1
This study was carried out to evaluate the application possibility of UF Membrane System to papermaking industry in order to optimize the recycling of white water. In this study, for the efficiency test of UF modules, the MWCO(molecular weight cut-off) of the membrane was estimated by the COD measurement from UF filtrate water. From the rejection rate of membrane, three kinds of UF module were selected and evaluated in the factors of COD, SS, turbidity and flow rate.
강산 및 강알칼리 음독에서 냉각 용액을 사용한 희석 요법과 중화 요법의 가능성
이중의,송형곤,김동훈,권운용,곽영호,서길준,윤여규 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3
Background: There is no effective treatment modality for caustic agent ingestion. Dilution and neutralization are prohibited because of the risk of secondary thermal injury. This experiment is designed to evaluate the amount of dilution and neutralization heat and to gauge the applicability of dilution and neutralization therapy using cold solutions to suppress the peak temperature. Methods: This is an in-vitro chemical experiment. HCl, CH3COOH, NaOH, and NH4OH are selected as representatives of strong and weak acids and strong and weak alkali, respectively. 20℃, 11.6M, 5.8M, and 2.9M solutions of each acid and alkali are made and mixed using a magnetic stirrer at a room air temperature of 28℃. The peak temperature, the duration above 40℃, and the heat amount are measured or calculated. Results: When a 11.6M HCl or NaOH solution is diluted with same amount of water, 32 or 18cal. per mL of HCl or NaOH is produced, respectively. HCl produces a significant peak temperature, but NaOH does not. The lower the concentration, the lower the amount of heat production. 11.6M CH3COOH and NH4OH solutions don't produce dilution heat.11.6M and 5.8M solutions of all acids and alkali produce destructive neutralization heat. However, 2.9M solutions produce neutralization heat which might be controllable. When a 11.6M HCl or NaOH solution is neutralized with a -10℃ 2.9 M NaOH or HCl solution, respectively, the peak temperature produced is below 40℃ and seems to add little thermal damage to viable tissue. Conclusion: Dilution and neutralization with a cold solution in cases of strong acid or alkali ingestion is a promising method to avoid thermal injury.
Kim, Jong-Man,Lee, Sang-Hyo,Park, Jae-Hyoung,Kim, Jung-Mu,Baek, Chang-Wook,Kwon, Young-Woo,Kim, Yong-Kweon The Institute of Electronics and Information Engin 2004 Journal of semiconductor technology and science Vol.4 No.4
This paper reports a novel tunable bandpass filter using two-state switched inductor with direct-contact MEMS switches for wireless LAN applications. In our filter configuration, the switched inductor is implemented to obtain more stable and much larger frequency tuning ratio compared with variable capacitor-based tunable filter. The proposed tunable filter was fabricated using a micromachining technology and electrical performances of the fabricated filter were measured. The filter consists of spiral inductors, MIM capacitors and direct-contact type MEMS switches, and its frequency tunability is achieved by changing the inductance that is induced by ON/OFF actuations of the MEMS switches. The actuation voltage of the MEMS switches was measured of 58 V, and they showed the insertion loss of 0.1 dB and isolation of 26.3 dB at 2 GHz, respectively. The measured center frequencies of the fabricated filter were 2.55 GHz and 5.1 GHz, respectively. The passband insertion loss and 3-dB bandwidth were 4.2 dB and 22.5 % at 2.55 GHz, and 5.2 dB and 23.5 % at 5.1 GHz, respectively.
Kim, Min-Soo,Kim, Jong-Ho,Lee, Yoon-Sik,Lim, Geon-Gyu,Lee, Hyang-Beom,Park, Jae-Hyoung,Kim, Yong-Kweon IOP 2009 JOURNAL OF MICROMECHANICS AND MICROENGINEERING - Vol.19 No.1
<P>We present an experimental and theoretical analysis of dielectrophoretic (DEP) particle deflection in a microfluidic channel for the separation of protein-bound particles. A 2D electrode array with widely spaced bars is designed to deflect a particle at the exit of the fluidic channel by negative DEP force. When particles pass through the channel, the particle streams are deflected differently depending on the DEP characteristics of the particles. In this paper, we propose methodologies to characterize the DEP force with the deflection distance using comparative analyses of a simulation and an experiment. The deflection distances of the particles are measured as a function of the ac voltage applied and compared with full 3D simulations. The Clausius–Mossotti (CM) factor of a protein-bound particle is analyzed, based on frequency-dependent deflection distance data measured experimentally, and protein-bound particles are separated from a mixture with nonbound particles in a real application. Two particle groups, 2.3 µm and 6.4 µm polystyrene particles, were used for the simulation and experimental study, and the 6.4 µm diameter particles were selected as an adequate protein-binding substrate for the application of biomolecular detection. Bovine serum albumin (BSA) was used as a test target protein. The particle's BSA binding is identified by the change in the particle's deflection distance. In particular, we used 1 wt% BSA as a target protein sample to investigate the deflection of 6.4 µm diameter particles as a function of protein concentration. The frequency-dependent CM factor curves for BSA-bound and nonbound particles are also calculated theoretically. Therefore, this paper shows a model analytic study on the biomolecular detection performance of a fabricated DEP-deflection microsystem. In addition, we present further significant analyses such as calculation of the electrical surface conductance of BSA around a particle, and we trace simulation errors. The surface conductance of particles treated with 1 wt% BSA was calculated to be 1.36 nS.</P>
김형권(Hyoung-Kweon Kim),손영창(Young-Chang Son),손진규(Jin-Kyu Son) 한국정보과학회 2009 한국정보과학회 학술발표논문집 Vol.36 No.2B
KVMF 메시지는 KVMF 전술데이터링크 시스템에 사용되며, 다양한 형태의 데이터를 실시간으로 교환하다. 이러한 KVMF 메시지를 처리하기 위해, KVMF 메시지처리 소프트웨어는 개발되어져야 한다. KVMF 메시지처리 소프트웨어 소스코드 자동 생성기는 KVMF 메시지처리 소프트웨어의 개발기간을 단축시키고, 소프트웨어 개발 오류를 제거하는데 그 목적이 있다.
Identification of the Elements Regulating the Expression of the Phospholipase C Delta1
Hongtae Kim,Jae Young Kim,Kyoung-Ah Kim,Young Lim,Young-Hoon Kim,Pil-Woo Huh,Kweon Haeng Lee,Hoon Han,Young Pil Wang,Hyoung Kyun Rha 한국분자세포생물학회 2002 Molecules and cells Vol.14 No.1
Recently we cloned the phospholipase C delta1 (PLC-d1) promoter region and found that PLC-d1 is selec-tively expressed in several tissues. In order to estab-lish the common and cell-type specific transcriptional elements, 1.8 kilobase of the 5¢-flanking region of PLC-d1 was characterized in several cell lines. A tran-sient transfection assay of the -1787-Luc construct in several cell lines demonstrated the potential transcrip-tional enhancement of reporter activities in the neuroblastoma cell [SK-N-BE(2)C] and kidney cell lines (Cos-7), but not in liver cell lines (Chang liver cell). Transient transfection assays of a series of 5¢ 3¢ deletion constructs of the PLC-d1 promoter and electronic mobility shift assays suggested that the E-box and HFH3 binding sites are cell-type specific elements, and that Sp-1 is a major transcriptional activator of a majority of cell lines. Our findings, therefore, indicate that the combination of several elements within the 5¢-flanking region of the PLC-d1 gene dictates its restricted expression in several cell lines.