http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Gas chromatography-Thermal Energy Analyzer에 의한 휘발성 니트로소아민과 담배 특유의 니트로소아민들의 동시 분석연구
이문수,지상운,박영수,Rhee, Mun-Su,Ji, Sang-Woon,Park, Yang-Su 한국연초학회 1993 한국연초학회지 Vol.15 No.2
This is to investigate the methodology for the simultaneous determination of Wk, mk and TSNA using gas chromatography(GC) in combination with chemiluminescence detector, thermal energy analyzer(TEA) . The simultaneous analysis has been estimated by evaluating tobacco. The TEA was linked to GC equipped with non -polar SPB -5 fused silica capillary column which was introduced into the ceramic pyrolysis tube by the point of 16cm from the end of TEA. Quantification was carried out by internal standardization with WDPA after calibration of retention times and response factors with authentic nitrosoamines. It was demonstrated that WDPA was most preferable as internal standard for the simultaneous analysis. The recoveries of the internal standard were in the range of 83∼96% . Nitrosoamines in this method were detected with determination limit of 0.1ng and was made by a straight line in calibration curve by TEA response. The suitability of nitrosoamines extraction in tobacco leaf was investigated. It was most suitable to extract nitrosoamines from tobacco leaves with 0.01 M NaOH within a period of 8 hours. Thimerosal as an antibacterial agent was added to NaOH solution to prevent artifactual formation. The fractionation and the purification of nitrosoamines form alkaline extracts were conveniently performed using Extrelut multilayer column and dichloromethane. Reproducible and reliable results were obtained for the determination of nitrosamines in a relatively short time compared to previous known method. TSNA contents in burley were about 4 times higher as those in the fluecured tobacco.
이문수,장기철,지상운,Rhee, Mun-Su,Jang, Gi-Cheol,Ji, Sang-Un 한국연초학회 1993 한국연초학회지 Vol.15 No.1
Nitric oxide of gas phase in cigarette smoke was conveniently determined by Chemiluminescence NO analyzer with 20 ports rotary type smoking machine Data are presented to support this observation. On the basis of this method the amount of NO in the smoke from nonblended and commercial cigarettes were estimated. Gas phase NO concentration in main stream smoke was correlated well with the nitrate levels in tobacco leaves, but there was no correlation with the tar yields. In consequence, it would be considered that the methodology in this study provided simple and rapid quantification for NO in cigarette smoke.
Environmental Tobacco Smoke의 이화학적 특성
이문수 한국연초학회 1995 한국연초학회지 Vol.17 No.1
On the basis of the literature, which is at present still scientific information improvable, the results of research done so far into the occurrence and analytical methodology of major markers of environmental tobacco smoke(ETS) have been summarized. Key areas addressed are: differences in physicochemical composition between mainstream smoke, sidestream smoke and ETS: techniques for field measurement of ETS: relationship between indoor air quality with ETS and its distribution view of US EPA and its problems: biological effects and concerning estimation of ETS exposure.
李汶樹 全南大學校 農漁村開發硏究所 1982 농어촌개발연구 Vol.17 No.2
This paper treats the deformation characteristics rather than the shear ones. On the reconsolidated and remoulded saturated clay sampled from the downstream of Yeongsan river in Cheollanamdo, it is investigated that the prediction of strains will be possible based on the theory considering the effect of dilatancy among the several prediction theories1) developed so far through the undrained and drained triaxial compression test. The conclusions analized are as follows. 1. It is confirmed that the stress paths obtained from the undrained triaxial test with constant cell pressure are similar one another. and state path normalized with Pe (mean equivalent pressure) is overlapped on the same locus. 80 that there exists a unique state path on the specimens used in this experimental study. 2. The volumetric strain due to the model based on the characteristics of the dilatancy effects is similar to the experimental observation. 3. Thè prediction of shear strain due to both the incremental theory and the volumetric strain2) is similar to the experimental observation.