http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jeong, Jin,Kim, Seung Hee The Basic Science Institute Chosun University 2018 조선자연과학논문집 Vol.11 No.4
A zinc oxide thin film doped with aluminum was deposited by RF sputtering. The deposition temperature of the sputter chamber was kept constant at $350^{\circ}C$, the power supplied to the chamber was 75 W, the oxygen flow rate was changed to 10 sccm and 20 sccm, and the thin film deposition time was changed to 120 and 180 minutes. The structures of the deposited zinc oxide thin films were analyzed by van der Waals method using an X-ray diffractometer. As a result of X-ray diffraction, the amount of oxygen supplied to the zinc oxide thin film increased, and the surface growth of the (002), (400), (110), and (103) planes showed a change with increasing deposition time. Moreover, as the amount of oxygen supplied to the zinc oxide thin film increased, their shape was observed to be coarse, and the thin film' s particles shape was correlated with the oxygen chemical defect introduced.
Jeongjin Son,차상원 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.5
Sex hormones are important metabolites in vertebrates’ development and reproduction. For rapid screening sex hormones, matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS) is one of the promising analytical platforms, but MALDI MS faces many challenges in detecting steroids such as low ionization efficiency and matrix background interference. One potential strategy to overcome matrix interference in the low m/z region is using a cyclodextrin (CD)-supported matrix for steroid analysis since CDsupported matrixes are known to effectively suppress matrix-related ion signals. In this study, we aimed to find the optimal CD-supported matrix for the analysis of the nonderivatized sex steroids. Our results showed that the αCD-supported 2,5-dihydroxybenzoic acid (DHB) matrix efficiently ionized all three major classes of sex hormones, estrogens, androgens, and progestagens, with low or no matrix background and also with high sensitivity. In addition, the αCD-supported DHB matrix mainly generated molecular ions or protonated ions of sex hormones, and this enabled us to obtain information-rich tandem mass spectra which potentially lead to unambiguous identification of steroid species from complex metabolite mixtures.
JeongJin Kim,SooJin Kim,SangSoo Lee 한국지질과학협의회 2003 Geosciences Journal Vol.7 No.4
The morphology of Gallionella ferruginea and othermicroorganisms in the ochreous precipitates in acid mine drainage(AMD) were investigated using a scanning electron microscope(SEM) equipped with energy dispersive spectrometry (EDS). Min-eralogy of the precipitate containing the microorganism was char-Galionella ferrugineahaving twisted structure are found from precipitate samples onthe stream bottom in AMD. Other microorganisms, characterizedby coccus, bacillus, rod or cylindrical forms, are also observed inthe precipitates. The ochreous preciptate was appeared reddishbrown color (Munsell color 3.5YR hues) and consisted mainly offerrihydrite with minor goethite.