2006;571;502-; originally published online Feb 2, 2006; J. Physiol. Stephen W. Jones Are rate constants constant? This information is current as of March 21, 2006 publication unless article is open access. This version of the article may not be posted on a public website for 12 months after http://jp.physoc.org/cgi/content/full/571/3/502 This is the final published version of this article; it i...

Transient network hydrogels cross-linked through histidine-divalent cation coordination bonds were studied by conventional rheologic methods using histidine-modified star poly(ethylene glycol) (PEG) polymers. These materials were inspired by the mussel, which is thought to use histidine-metal coordination bonds to impart self-healing properties in the mussel byssal thread. Hydrogel viscoelastic...

We discuss the recoupling of homonuclear dipolar interactions between quadrupolar nuclei under magic-angle spinning conditions, caused by the first-order quadrupolar interaction. This recoupling leads to NMR linewidths displaying a nonmonotonic dependence on the spinning frequency, meaning that broader lines may result as the spinning rate is increased. The effect depends on geometrical paramet...

Although H2 is the simplest and most abundant molecule in Universe, its formation interstellar medium, especially photodissociation regions far from being fully understood. According to suggestions, of catalysed by polyaromatic hydrocarbons (PAHs) on surface grains. In present study we have investigated catalytic effect small PAHs with an imperfect aromatic system. Quantum chemical computations...

The Total Collision Energy (TCE) model is used to simulate chemical reactions in the Direct Simulation Monte Carlo method. Colliding particle pairs with total collision energy (translational plus internal energy) greater than an activation energy are accepted for reaction with a probability which depends on the amount of the collision energy in excess of the activation energy. Constants in the ...

Eight distinct hydroxy nitrates are stable products of the first step in the atmospheric oxidation of isoprene by OH. The subsequent chemical fate of these molecules affects global and regional production of ozone and aerosol as well as the location of nitrogen deposition. We synthesized and purified 3 of the 8 isoprene hydroxy nitrate isomers: (E/Z)-2-methyl-4-nitrooxybut-2-ene-1-ol and 3-meth...