Ref HAL: hal-00550429_v1
PMID 18031067
DOI: 10.1021/la702037k
WoS: 000251583000041
Exporter : BibTex | endNote
49 Citations
Résumé:

Microscopic and molecular structures of ω- and γ-gliadin monolayers at the air-water interface were studied under compression by three complementary techniques: compression isotherms, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), and Brewster angle microscopy (BAM). For high molecular areas, gliadin films are homogeneous, and a flat orientation of secondary structures relative to the interface is observed. With increasing compression, the nature and orientation of secondary structures changed to minimize the interfacial area. The γ-gliadin film is the most stable at the air-water interface; its interfacial volume is constant with increasing compression, contrary to ω-gliadin films whose molecules are forced out of the interface. γ-Gliadin stability at a high level of compression is interpreted by a stacking model.