中文摘要：

用小角X射线（SAX）研究聚乙烯吡咯烷酮（PVP）对磷脂酰乙醇胺（PE）脂质膜结构的影响。研究发现，在PE—PVP膜中，随着PVP浓度的增加，发生了由立方相Im3m（Q^229）到立方相Pn3mQ^224）的相变。在0．05wt％PVP中，PE—PVP膜是处在Im3m（Q^229）和Pn3m（Q^224）共存的立方相。在0．5wt％PVP中，PE—PVP膜是以立方相Pn3m（Q^224）存在。

英文摘要：

The effects of polyvinylpyrrolidone （PVP） on the phase stability and structures of the mixture membranes of 1, 2 - Dielaidoyl - sn - glycero - 3 - phosphoethanolamine （DEPE） have investigated by small angle X-- ray scattering. A phase transition from Im3m （Q^229） to Pn3m （Q^224） phase occurred with increasing PVP concentration in the DEPE- PVP membrane. At 0.05 wt% PVP,DEPE- PVP membranes were in the coexistence cubic phase of both Q^224 and Q^229 ,and at 0.5 wt% PVP,DEPE membranes were in the Q^224 phase.