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Your search keyword '"Chen, Aiju"' showing total 19 results
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19 results on '"Chen, Aiju"'

7. Hydrodynamics research of a two-body articulated wave energy device

Author

Chen Aiju, Zhang Chao, and You Ya-ge

Subjects
Physics, Environmental Engineering, 020209 energy, Equations of motion, Ocean Engineering, 02 engineering and technology, Geometric shape, Mechanics, Function (mathematics), Width ratio, Energy device, Simple (abstract algebra), 0202 electrical engineering, electronic engineering, information engineering, Boundary element method, Excitation
Abstract

The paper proposed a calculation method for a two-body articulated wave energy device with a complex geometric shape. The hydrodynamic performance of the Eagle wave energy device as an example was studied. The hydrodynamic calculation was carried out by the boundary element method based on the simple Green's function to solve the wave excitation force and hydrodynamic coefficients. Based on the above, the motion equation was obtained. Using the motion equation, the hydrodynamic response and capture width ratio of the device at different wave frequencies were calculated. In summary, this computational result can be used to evaluate and optimize the performance of the articulated wave energy device.

Published
2018

19. Effect of pH on the complexation of kaempferol-4'-glucoside with three β-cyclodextrin derivatives: isothermal titration calorimetry and spectroscopy study.

Author

Zheng Y, Dong LN, Liu M, Chen A, Feng S, Wang B, and Sun D

Subjects
Calorimetry, Entropy, Hydrogen-Ion Concentration, Molecular Structure, Solubility, Spectrum Analysis, Glucosides chemistry, Kaempferols chemistry, beta-Cyclodextrins chemistry
Abstract

The utilization of kaempferol and its glycosides in food and pharmaceutical industries could be improved by the formation of inclusion complexes with cyclodextrins at different pH. This study explores the complexation of kaempferol-4'-glucoside with sulfobutyl ether-β-cyclodextrin (SBE-β-CD), hydroxypropyl-β-cyclodextrin (HP-β-CD), and methylated-β-cyclodextrin (M-β-CD) in phosphate buffer solutions of different pH using isothermal titration calorimetry, UV-vis absorption and proton nuclear magnetic resonance spectroscopy at 298.2 K. Experimental results showed that kaempferol-4'-glucoside binds with the three β- cyclodextrins in the same 1:1 stoichiometry. The rank order of stability constants is SBE-β-CD > HP-β-CD > M-β-CD at the same pH level and pH 6.0 > pH 7.4 > pH 9.0 for the same cyclodextrin. The binding of kaempferol-4'-glucoside with the three β-cyclodextrin derivatives is synergistically driven by enthalpy and entropy at pH 6.0 and enthalpy-driven at pH 7.4 and 9.0. The possible inclusion mode was that in the cavity of β-CD is included the planar benzopyranic-4-one part of the kaempferol-4'-glucoside.

Published
2014
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