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Articles by Wen ke Liu
Total Records ( 2 ) for Wen ke Liu
  Wen Ke Liu , Qi Chang Yang and Lian Feng Du
  Two glasshouse experiments were conducted to investigate the efficiencies of various hydroponic solutions and their concentration effects in reducing nitrate concentration of lettuce after short-term treatment. The first experiment showed that hydroponic solutions of 0.1 mM KCI, 0.75 mM K2SO4, 0.1 mM KCI plus 0.75 mM K2SO4 and 5.0 x 10− 5 mM (NH4)6MO7O24 significantly decreased nitrate concentration in expanded leaves of lettuce, and tap water and distilled water did slightly. However, all treatment solutions did not significantly lower the nitrate concentration in petioles. The second experiment showed that all KCI, K2SO4 and (NH4)6MO7O24 solutions reduced nitrate concentration both in leaves and petioles, but increased concentration of treatment solutions did not enhance the efficiencies. In conclusion, 0.1 mM KCI, 0.75 mM K2SO4, 0.1 mM KCI plus 0.75 mM K2SO4 and 5.0 x 10− 5 mM (NH4)6MO7O24 were efficient treatment solutions to decrease nitrate concentration of hydroponic lettuce for short-term treatment, but their efficiencies were not improved with the increased solute concentration.
  Hai quan Zhang , Wen ke Liu , An lei Qin , Fei fei Wang , Li cheng Zhao , Shuai Zhang , Ying Li and Huai Yang
  A novel series of chiral dopants synthesised from (S)-1, 2-propanediol and mesogenic carboxylic acids were characterised by Fourier transform infrared and 1H nuclear magnetic resonance, and their helical twisting properties were investigated by doping the chiral dopants into a nematic liquid crystal host (SLC-1717). The results showed that the values of the molecular twisting power β were significantly dependent on the nature of the terminal substituents, terminal alkyl length and numbers of chiral centres in the molecular structure. Compared to compounds with electron-with-drawing groups (-NO2, -F, -CF3), the chiral compounds with terminal alkyl chains exhibited a higher β.
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