Chateaubriand est un pionnier du romantisme fran*sais. Les Mémoires d′outre-tombe exerceront une influence majeure sur la littérature fran*saise. Si l′on considère les moeurs de son temps et son parco...Chateaubriand est un pionnier du romantisme fran*sais. Les Mémoires d′outre-tombe exerceront une influence majeure sur la littérature fran*saise. Si l′on considère les moeurs de son temps et son parcours personel, on pourrait distinguer chez Chateaubriand à la fois un homme de contradictions et un passeur entre deux展开更多
The multiphoton ionization dissociation of HFC 152a and HFC 134a under the irradiation of 355 nm and 266 nm was studied in this work. Their photolyzed products were analyzed by time of flight mass spectrum instrument....The multiphoton ionization dissociation of HFC 152a and HFC 134a under the irradiation of 355 nm and 266 nm was studied in this work. Their photolyzed products were analyzed by time of flight mass spectrum instrument. The photolyzed products of HFC 152a include H +( m/z =1), C +( m/z =12), CH + 3( m/z =15), C + 2( m/z =24), CF 2H +( m/z =51), and CF +( m/z =31), whereas there is no clear products for HFC 134a photolyzation. Further, the application prospects of HFC 152a and HFC 134a in refrigeration sector were also evaluated from the view point of environmental protection, synthesis conditions and usage performance. It is suggested that HFC 152a is a better alternative compared to HFC 134a in refrigeration sector.展开更多
文摘Chateaubriand est un pionnier du romantisme fran*sais. Les Mémoires d′outre-tombe exerceront une influence majeure sur la littérature fran*saise. Si l′on considère les moeurs de son temps et son parcours personel, on pourrait distinguer chez Chateaubriand à la fois un homme de contradictions et un passeur entre deux
文摘The multiphoton ionization dissociation of HFC 152a and HFC 134a under the irradiation of 355 nm and 266 nm was studied in this work. Their photolyzed products were analyzed by time of flight mass spectrum instrument. The photolyzed products of HFC 152a include H +( m/z =1), C +( m/z =12), CH + 3( m/z =15), C + 2( m/z =24), CF 2H +( m/z =51), and CF +( m/z =31), whereas there is no clear products for HFC 134a photolyzation. Further, the application prospects of HFC 152a and HFC 134a in refrigeration sector were also evaluated from the view point of environmental protection, synthesis conditions and usage performance. It is suggested that HFC 152a is a better alternative compared to HFC 134a in refrigeration sector.
