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CdTe Quantum Dots as Fluorescent Probes for Josamycin Determination
Jinyun Peng,Keliang Nong,Guangshan Mu,Fengying Huang 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
A new method for the determination of josamycin has been developed based on quenching of the fluorescence of 3-mercaptopropionic acid-capped CdTe quantum dots (MPA-CdTe QDs) by josamycin in ethanol. Reaction time, interfering substances on the fluorescence quenching, and mechanism of the interaction of CdTe QDs with josamycin were investigated. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of josamycin between 12.0 and 120.0 μg mL^(−1) with a correlation coefficient of 0.9956 and a detection limit of 2.5 μg mL^(−1). The proposed method was successfully applied to commercial tablets, and the results were satisfactory, i.e. consistent with those of high-performance liquid chromatography (HPLC).
CdTe Quantum Dots as Fluorescent Probes for Josamycin Determination
Peng, Jinyun,Nong, Keliang,Mu, Guangshan,Huang, Fengying Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
A new method for the determination of josamycin has been developed based on quenching of the fluorescence of 3-mercaptopropionic acid-capped CdTe quantum dots (MPA-CdTe QDs) by josamycin in ethanol. Reaction time, interfering substances on the fluorescence quenching, and mechanism of the interaction of CdTe QDs with josamycin were investigated. Under optimum conditions, the relative fluorescence intensity was linearly proportional to the concentration of josamycin between 12.0 and 120.0 ${\mu}g\;mL^{-1}$ with a correlation coefficient of 0.9956 and a detection limit of 2.5 ${\mu}g\;mL^{-1}$. The proposed method was successfully applied to commercial tablets, and the results were satisfactory, i.e. consistent with those of high-performance liquid chromatography (HPLC).
Nonparaxial correction solution to isodiffracting sub-cycle pulsed beam propagation in free space
Hong Guo,Dongmei Deng,Fahuai Yi,Hong Jin Kong,Lu Guangshan 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.5
The propagation of an isodifiracting sub-cycle pulsed beam, modelled by a Poisson spectrum, in free space is studied, and a nonparaxially corrected solution is presented both analytically and numerically. Numerical simulations indicate that, for a half-cycle pulsed beam, the paraxial approximation is not valid, so the nonparaxial corrections must be taken into account.
Lei Wang,Jiangtao Jia,Muhammad Faheem,Yuyang Tian,Guangshan Zhu 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
A transparent, freestanding Porous Aromatic Framework-97 (PAF-97) membrane was successfully synthesized via a one-step acid-catalyzed reaction. Due to the introduction of ether groups, the obtained PAF-97 membrane possesses enhanced structural flexibility, thus increasing the flexibility of the resulting membrane. This is proofed by the fact that the feeding pressure of the membrane reaches as high as 5.5 bar during the separation of gas mixtures. The Young’s moduli of the membrane were 6.615 GPa and 11.11 GPa, either in a dry or hydrated state respectively. To be highlighted, under a feeding pressure of 3.6 bar, the PAF-97 membrane rendered the permeance values of 2.90 × 10−7, 1.29 × 10−8 mol m−2 s−1 Pa−1 for CO2 and CH4, respectively, with a CO2/CH4 permselectivity of 22.48.