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1,1,1 TCE 의 대체 세정제에 대한 세정 성능 비교
정용안,황영한,노경호 ( Yong An Jung,Young Han Hwang,Kyung Ho Row ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Many alternatives to 1,1,1 TCE (1,1,1 trichloroethane) mainly used as cleaning solvent for metal parts are developed and commercialized because the solvent is scheduled to phaseout after 1996. Considering there are many kinds of parts and contaminants in metal cleaning, it is essential to investigating the characteristics and performance of the alternatives prior to use. For the contaminant of a cutting oil, Actrel 1047L and Solena vda which are the commercially available and promising alternatives were experimented at the same cleaning condition of 1,1,1 TCE to check the cleaning performance. The experimental results showed that the removal efficiency of 1,1,1 TCE was the lowest at the dipping cleaning condition, but it was better at the ultrasonic condition. Overally, the removal efficiency of Solena vda was better than that of Actrel 1047L for removing the cutting oil used in this experiment. But the small portion of spot was not entirely cleaned out with Solena vda, and its removal efficiency in terms of the number of experiments was worse than that of Actrel 1047L. Also trichloroethylene which is one of the conventional chlorinated solvents showed the smallest change in the removal efficiency.
고산홍경천 에탄올 추출물의 항산화작용과 쥐의 혈압 및 골격근 수축성에 미치는 영향
김은철(Yinzhe Jin),청위동(Yu-dong Cheng),이광진(Kwang Jin Lee),정용안(Yong An Jung),노경호(Kyung Ho Row) 한국생물공학회 2011 KSBB Journal Vol.26 No.3
To study the effects of ethanol extract of the Rhodiola Sachalinensis on the anti-oxidation and blood pressure and skeletal muscles contractility in rats. The ethanol extracts and fractions of Rhodiola Sachalinensis were determinated the anti-oxidation effects by DPPH (1,1-dipenyl- 2-picrylhydrazyl) method and comparing with the BHA (Butylated hydroxyanisole) and AA (Ascorbic acid). The gastrocnemius and soleus muscle contractility were observed by stmulating the sciatic nerve with electricity after affusing stomach with ethanol extract of the 200 mg/kg dosage of Rhodiola Sachalinensis for 4 weeks. The ethanol extract of the Rhodiola Sachalinensis could shorten latent period, increase maximal contractive extent and time and relaxative time at the twitch and complete tetanus of gastrocnemius and soleus muscles. The ethanol extract of the Rhodiola Sachalinensis shows high anti-oxidation effect and can enhance skeletal muscles contractility in rats.
노경호,이광진,정용안 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.6
반도체 웨이퍼의 표면 변화에 따른 대체세정제의 세정효율을 측정하기 위하여 ESCA(Electron Spectroscopy for Chemical Analysis)를 이용하여 웨이퍼의 표면을 분석하였다. 농도가 1,000ppm인 4개(Fe, Cu, Ni, Zn)의 표준 용액을 오염물질로 사용하였고, 대체세정제로 APG C_(8-12)와 APG C_14를 사용하였다. ESCA 분석결과 Si, C, O peak가 검출되었으며, 각 오염물질에 대해서 APG C_14가 APG C_(8-12)보다 우수한 세정도를 나타냈다. To measure the cleaning efficiency of alternative cleaning solvents by surface variation of semi-conductive wafer, the experiments were carried out surface analysis of wafer by ESCA(Electron Spectroscopy for Chemical Analysis). Five 1,000 ppm standard solutions(Fe, Cu, Zn, Ni) were used as contaminant materials, and APG C_(8-12) and C_14 were used as alternative cleaning solvents. To result the analysis of ESCA, Si, C and O were detected to major peak and for each contaminant material, APG C_14 was shown better cleaning efficiency than APG C_(8-12).