Novel insight into cellulose supramolecular structure through ¹³C CP-MAS NMR spectroscopy and paramagnetic relaxation enhancement.

(13)C CP-MAS NMR and paramagnetic relaxation enhancement provide novel insight into the supramolecular structure of solid cellulose I and II. Separable NMR signals associated with crystalline interiors, solvent accessible and inaccessible surfaces, as well as non-crystalline material are assigned and confirmed. For the first time solvent accessibility is evidenced and monitored through (13)C T1 NMR relaxation enhancement in paramagnetic medium.

Asymmetric or symmetric bilayer formation during oblique drop impact depends on rheological properties of saturated and unsaturated lipid monolayers.

Bilayer structures are formed by approaching two liquid surfaces with phospholipid monolayers, which are brought into contact by oblique drop impact on a liquid surface. Asymmetric bilayers can be produced by the coupling of drop and target monolayers. In contrast, symmetric bilayers or multilayers are formed by collapse of the compressed target monolayer.