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Li Chengfeng,Lyu Qishen,Li Zheng,Yang Shuliang,Sun Yong,Tang Xing,Zeng Xianhai,Lin Lu 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9
The hydrogenation of biomass-based furan compounds is an important step for the catalytic valorization of biobased chemicals. In this work, Ru-based catalysts supported on different supports, such as HY, MgO and Amberlyst-15, were prepared and estimated for the hydrogenation of dimethyl 2,5-furandicarboxylate (FDMC). Among them, Ru/HY provided a desirable yield of 99.4% for tetrahydrofuran-2,5-dicarboxylic acid dimethyl ester (THFDMC) under 90 °C and 3 MPa H2. Based on catalyst characterization, Ru/HY could offer more surface Ru0 species and carbon radical intermediates than other catalysts, which could largely favor the activation of hydrogen and then promote the hydrogenation of FDMC over Ru/HY.
Feng Ding,Dandan Meng,Jiyang Dai,Qishen Li,Ahmed Alsaedi,Tasawar Hayat 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.2
By means of the model equivalence theory, this paper proposes a model equivalence based least squares iterative algorithm for estimating the parameters of stochastic dynamical systems with ARMA noise. The proposed algorithm reduces the number of the unknown noise terms in the information vector and can give more accurate parameter estimates compared with the generalized extended least squares algorithm. The validity of the proposed method is evaluated through a numerical example.
Zaixing Chen,Fanhao Meng,Xixiang Ying,Shu Meng,Xu Zhu,Hong Jiang,Qishen Cao,Xuying Li 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.5
The present study was designed to validate an analytical method based on HPLC for the quantitative measurement of the Apigenin-7-O-β-D-glucoside (AGL) in rat plasma after intravenous administration. HPLC analysis was done using a C_18 column, UV detection at 335 nm, and a mobile phase of methanol:0.2% phosphoric acid (1:1, v/v). Good linearity was observed over the range of 0.06-7.20 μg/mL with a lower limit of quantication of 0.06 μg/mL. The intraand inter-day precision values were below 9.97%. No interference peaks or matrix effects were observed. The method was fully validated and successfully applied to a pharmacokinetic study of AGL.