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oai:www.ideals.illinois.edu:2142/84184 2023-07-11 col_2142_5131 col_2142_14789 com_2142_5130 com_2142_14788 com_2142_8903

Gewirth, Andrew A. Feng, Zengqi Vivian 2015-09-25T22:13:22Z 2015-09-25T22:13:22Z 10000-01-01 2005 2005 Second, soft imaging mode of AFM and phase modulated ellipsometry are used to observe the phase transition process of supported lipid bilayer systems with and without the influence of other macromolecules. Addition of a weak polyelectrolyte, poly(methacrylic acid) (PMA), to a supported phospholipid bilayer depresses the melting temperature and alters the morphology of the bilayer in the gel phase. AFM study of the gel-fluid phase transition in supported phospholipid bilayers shows that at ∼5°C above Tm, AFM studies reveal the presence of a secondary phase transition. The secondary phase transition occurs as a consequence of decoupling between the two leaflets of the bilayer due to enhanced stabilization of the lower leaflet with either the support or the water entrained between the support and the bilayer. Addition of the transmembrane protein gramicidin A or construction of a highly defected gel phase results in elimination of this decoupling and removal of the secondary phase transition. Made available in DSpace on 2015-09-25T22:13:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3198990.pdf: 4848147 bytes, checksum: 3dfb2e12e3c1dd2895fb8dfe58594650 (MD5) Previous issue date: 2005 Embargo set by: Seth Robbins for item 85465 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 150 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005. http://hdl.handle.net/2142/84184 (MiAaPQ)AAI3198990 eng Chemistry, Analytical Microscopic and Spectroscopic Investigation Of: I. Copper-Additive Systems in Electroplating Bath. II. Supported Phospholipid Bilayer Systems text Chemistry Chemistry University of Illinois at Urbana-Champaign Dissertation Ph.D.