Experimental study of the ferroelastic phase transition in urea/n-heptadecane composite
Article Abstract:
The ferroelastic phase transition in urea/n-heptadecane CO[(N[H.sub2.]).sub.2]/[C.sub.17][H.sub.40] composite around the structural phase transition undergone by this crystal at 159 K is analyzed. A phenomenological model is used to describe the phase transition from the hexagonal to the orthorhombic phases of the urea, which has resulted in a linear relation between the excess entropy and the spontaneous strain and the bifringence.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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Experimental charge density study of estrogens: 17[beta]-estradiol-urea
Article Abstract:
The charge density analysis of the series of 17[beta]-estradiol urea using optical coordinate system and slow, initially constrained refinement is presented. It is observed that the oxygen atoms seem to be near to [sp.sup.3] in shape, demonstrating two consistent, distinct lone pairs despite varying chemical environments.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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The influence of Urea and trimethylamine-N-oxide on hydrophobic interactions
Article Abstract:
The potentials of mean force for pairs of neopentane molecules immersed in aqueous solutions containing urea, trimethylamine-N-oxide (TMAO) obtained through molecular dynamics simulations suggest that TMAO does not counter the protein denaturing effect of urea by enhancing hydrophobic attraction amongst nonpolar groups.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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