Interactions of trimethylamine N-oxide and water with cyclo-alanylglycine

Article Abstract:

The osmolyte trimethylamine N-oxide (TMAO) is one of the family of compounds found in living systems that can stabilize biomolecular tertiary structures and intermolecular (super 1)H{(super 1)H} nuclear Overhauser effects between the protons of cyclo-alanylglycine and protons of solvent components in TMAO-water solutions are determined. It is concluded that the formation of solute-hydrated TMAO complexes with lifetimes longer than the rotational correlation time of the complex is most likely reason for the observed effects.

Industrial organic chemicals, not elsewhere classified, Methylamines, Glycine

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Molecular dynamics study of surfactant monolayers adsorbed at the oil/water and air/water interfaces

Article Abstract:

An investigation of the physical properties of monolayers of monododecyl diethylene glycol (C (sub 12) E (sub 2)) surfactants adsorbed at the oil/water and air/water interfaces by atomistic molecular dynamics (MD) simulations is carried out. The analysis demonstrates that the surfactant molecules show more extended conflicts with a resultant rise in the thickness of the monolayer in the presence of the oil medium, and that the hydrocarbons tails of the surfactants are more vertically oriented at the oil/water interface.

CHEMICALS AND ALLIED PRODUCTS, Ethylene Glycol, Analysis, Molecular dynamics, Adsorption, Mechanical properties

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Conformational change of poly(ethylene glycol) near the critical point of isobutyric acid + water

Article Abstract:

New measurements of the kinematic viscosity, v, are reported as a function of temperature for a solution of isobutyric acid + water at the critical composition, to which poly(ethylene glycol) (PEG) was added at a concentration of 6.01 mg/mL. The data reveal that v decreases near the critical point, with a maximum in v at about 0.05 degrees Celsius above the critical temperature, [T.sub.c].

Industrial Organic Chemicals, Butyric Acid, Polyethylene glycol

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