"I really didn’t expect that at my advanced age, I would be awarded the highest honor in international nursing circles," said Mme. Sun Jingxia, 81, who had just returned from Beijing where she received the ..."I really didn’t expect that at my advanced age, I would be awarded the highest honor in international nursing circles," said Mme. Sun Jingxia, 81, who had just returned from Beijing where she received the Nightingale Medal. Wearing a light yellow suit, with a collar bordered in red, Sun is inhigh spirits, reminding people of the beauty of the setting sun. It is clear that Sun Jingxia has deep feelings as she looks at the medal which shows a relief of Florence Nightingale’s head. She spoke in her usual soft voice but with some excitement, "President展开更多
The self-assembly between poly(4-diazonium styrene) (PDS) and poly(sodiumsulfonate styrene)(PSS) was investigated.The mutilayer ult ra thin films were fabricated layer-by-layer successfully from PDS and PSS.Af ter hea...The self-assembly between poly(4-diazonium styrene) (PDS) and poly(sodiumsulfonate styrene)(PSS) was investigated.The mutilayer ult ra thin films were fabricated layer-by-layer successfully from PDS and PSS.Af ter heating for 10 min at 70℃ the multilayer film became very stable towards po lar solvents.No considerable changes were observed for the heated film soaked i n DMF (20℃) for 48 h,while the unheated film almost destroyed at same conditio n.The dramatic improvement in stability of the film towards polar solvents shou ld be attributed to the conversion of bonds between the layers of the film from ionic bond to covalent bond under heating.Y(4 DIAZONIUMSTYRENE)ANDPOLY(SODIUMSULFONATESTYRENE)YANGZhaohui,JIANGWei,CAOWeixiao(CollegeofChemistryandMolecularEngineering ,PekingUniversity ,Beijing 10 0 871)Abstract Theself assemblybetweenpoly( 4 diazoniumstyrene) (PDS)andpoly(sodiumsulfonatestyrene) (PSS)wasinvestigated .Themutilayerultrathinfilmswerefabricatedlayer by layersuccessfullyfromPDSandPSS .Afterheatingfor 1 0minat 70℃themultilayerfilmbecameverystabletowardspolarsolvents.NoconsiderablechangeswereobservedfortheheatedfilmsoakedinDMF ( 2 0℃ )for48h ,whiletheunheatedfilmalmostdestroyedatsamecondition.Thedramaticimprovementinstabilityofthefilmtowardspolarsolventsshouldbeattributedtotheconversionofbondsbetweenthelayersofthefilmfromionicbondtocovalentbondunderheating .Keywords Poly( 4 diazoniumstyrene) 。展开更多
文摘"I really didn’t expect that at my advanced age, I would be awarded the highest honor in international nursing circles," said Mme. Sun Jingxia, 81, who had just returned from Beijing where she received the Nightingale Medal. Wearing a light yellow suit, with a collar bordered in red, Sun is inhigh spirits, reminding people of the beauty of the setting sun. It is clear that Sun Jingxia has deep feelings as she looks at the medal which shows a relief of Florence Nightingale’s head. She spoke in her usual soft voice but with some excitement, "President
文摘The self-assembly between poly(4-diazonium styrene) (PDS) and poly(sodiumsulfonate styrene)(PSS) was investigated.The mutilayer ult ra thin films were fabricated layer-by-layer successfully from PDS and PSS.Af ter heating for 10 min at 70℃ the multilayer film became very stable towards po lar solvents.No considerable changes were observed for the heated film soaked i n DMF (20℃) for 48 h,while the unheated film almost destroyed at same conditio n.The dramatic improvement in stability of the film towards polar solvents shou ld be attributed to the conversion of bonds between the layers of the film from ionic bond to covalent bond under heating.Y(4 DIAZONIUMSTYRENE)ANDPOLY(SODIUMSULFONATESTYRENE)YANGZhaohui,JIANGWei,CAOWeixiao(CollegeofChemistryandMolecularEngineering ,PekingUniversity ,Beijing 10 0 871)Abstract Theself assemblybetweenpoly( 4 diazoniumstyrene) (PDS)andpoly(sodiumsulfonatestyrene) (PSS)wasinvestigated .Themutilayerultrathinfilmswerefabricatedlayer by layersuccessfullyfromPDSandPSS .Afterheatingfor 1 0minat 70℃themultilayerfilmbecameverystabletowardspolarsolvents.NoconsiderablechangeswereobservedfortheheatedfilmsoakedinDMF ( 2 0℃ )for48h ,whiletheunheatedfilmalmostdestroyedatsamecondition.Thedramaticimprovementinstabilityofthefilmtowardspolarsolventsshouldbeattributedtotheconversionofbondsbetweenthelayersofthefilmfromionicbondtocovalentbondunderheating .Keywords Poly( 4 diazoniumstyrene) 。
