摘要 :
Phytochemical investigation of Arenga pinnata(Wurmb.) Merr.fruits led to the isolation of 5 new compounds,designated A.pinnata A-E(1-5),and 13 known compounds(6-18).All compounds were isolated from A.pinnata for the first time.The...
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Phytochemical investigation of Arenga pinnata(Wurmb.) Merr.fruits led to the isolation of 5 new compounds,designated A.pinnata A-E(1-5),and 13 known compounds(6-18).All compounds were isolated from A.pinnata for the first time.Their chemical structures were identified based on extensive spectroscopic methods,including HR-ESI-MS,ID and 2D-NMR.To the best of our knowledge,this is the first systematic scientific study on the chemical composition of the Arenga genus.
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摘要 :
Thin silver film is widely used as the cathode in organic light-emitting diode displays and it is generally fabricated using the thermal evaporation method. But during the evaporation process, there is an inevitable outgassing pro...
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Thin silver film is widely used as the cathode in organic light-emitting diode displays and it is generally fabricated using the thermal evaporation method. But during the evaporation process, there is an inevitable outgassing problem and this creates high viscosity bubbles in melted silver. When the bubbles break, the high energy released scatters silver droplets which damage the silver surface. In this study, we were able to decrease the number of droplets from 6,171 to 278 with a degassing process of 400 ℃ for 6 h before proceeding with a thermal evaporation process.
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