Charge stoichiometry inside polyelectrolyte-protein complexes: A direct SANS measurement for the PSSNa-Lysozyme System

Article Abstract:

Small angle neutron scattering and UV titration is used to study effect of the ratio of negative to positive charges on the structure of complexes formed by short negatively charged polyelectrolyte chains (PSS) and globular positively charged proteins (lysozyme). It is observed that the primary complexes reach a finite size, controlled by electrostatic repulsion, and then aggregate at a higher scale with a fractal dimension of 2.1 characteristic of reaction-limited colloidal aggregation.

Science & research, All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Polyelectrolytes, Research, Usage, Stoichiometry, Lysozyme, Report

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Self-assembled networks of ribbons in molecular hydrogels of cationic deoxycholic acid analogues

Article Abstract:

Aqueous gels derived from three cationic 24-nor 3,12-dihydroxy cholane (DC) derivatives with N-methyl-2-pyrrolidinone (NMP), N-methylmorpholine (NMM), and 1,4-diazabicyclo[2.2.2]octane (DABCO) at the side chain positions are exhaustively characterized by small-angle neutron-scattering experiments. The relations between the structural information and the rhetological properties are discussed.

Aqueous solution reactions

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Role of solubilized water in the reverse ionic liquid microemulsion of 1-butyl-3-methylimidazolium tetrafluoroborate/TX-100/benzene

Article Abstract:

The ionic liquid-in-oil (IL/O) microemulsions consisting of 1-butyl-3-methylimidazolium tetrafluoroborate (bmimB[F.sub.4]) surfactant TX-100 and benzene are prepared and the effect of water on the microstructure is studied. The results show that the addition of small amount of water to the IL/O microemulsion increased the amount of solubilized bmimB[F.sub.4].

Nuclear magnetic resonance spectroscopy, Ionic solutions

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