http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Simultaneous Determination of Harman, Harmaline and Norharman by Synchronous Fluorescence
Karim Mohammad Mainul,Lee Sang-Hak Korean Society of Photoscience 2005 Journal of Photosciences Vol.12 No.3
The simultaneous determination of harman, harmaline and norharman has been described using synchronous fluorescence technique. The method has been based on their natural fluorescence. It is difficult to analyze and determine their contents by conventional fluorescence method because of their similar molecular structures. The synchronous spectrum, maintaining a constant wavelength difference of ${\Delta}{\lambda}=185nm$ between the excitation and emission monochromators, was selected as optimum to perform the determination. The method was also performed in aqueous medium at pH 4.0 and in presence of sodium dodecyl sulfate (SDS), $1{\times}10^{-5}M$. Under the optimum conditions, each analyte has the linear determination range of $1{\times}10^{-7}M-\;1{\times}10^{-4}M$.
Rana, Ashequl A.,Karim, Mohammad Mainul,Takafuji, Makoto Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.1
A new high performance liquid chromatograpgy (HPLC) stationary phase that possesses an internal carbonyl functional group is synthesized by heterogeneous "graft from" method. This new stationary phase, poly (vinyl octadecanoate) grafted silica (Sil-2) is then characterized by different physico-chemical methods such as diffuse reflectance infrared fourier transform, suspension state $^1H$ NMR, solid state $^{13}C$ CP/MAS NMR, $^{29}Si$ CP/MAS NMR, elemental analysis and thermogravimetric analysis. Chromatographic properties of Sil-2 were evaluated under reversed phase condition by separating polycyclic aromatic hydrocarbons (PAHs) and comparing the chromatographic results with those on polymeric as well as monomeric octadecylated silica stationary phases.
Ashequl A. Rana,Mohammad Mainul Karim,Makoto Takafuji 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.1
A new high performance liquid chromatograpgy (HPLC) stationary phase that possesses an internal carbonyl functional group is synthesized by heterogeneous “graft from” method. This new stationary phase, poly (vinyl octadecanoate)grafted silica (Sil-2) is then characterized by different physico-chemical methods such as diffuse reflectance infrared fourier transform, suspension state ^1H NMR, solid state ^13C CP/MAS NMR, ^29Si CP/MAS NMR, elemental analysis and thermogravimetric analysis. Chromatographic properties of Sil-2 were evaluated under reversed phase condition by separating polycyclic aromatic hydrocarbons (PAHs) and comparing the chromatographic results with those on polymeric as well as monomeric octadecylated silica stationary phases.