Comparisons are made of the translational and rotational diffusion of small-molecule probes in a polymer near its glass transition temperature, Tg . In the rubbery state, 1.1Tg . T . Tg, translational diffusion is much less temperature dependent than rotational reorientation; in a “quenched” glass, translation and rotation have similar temperature dependencies. This is explained to be a consequ...

The photodissociation dynamics of the tert-butyl radical (t-C(4)H(9)) were investigated using photofragment translational spectroscopy. The tert-butyl radical was produced from flash pyrolysis of azo-tert-butane and dissociated at 248 nm. Two distinct channels of approximately equal importance were identified: dissociation to H + 2-methylpropene, and CH(3) + dimethylcarbene. Neither the transla...

This paper reports an investigation of the stability and dissociation dynamics of the low-lying singlet and triplet states of ozone (O3) using coincident photoelectron and photofragment translational spectroscopy. These experiments provide an upper limit of 0.5 μs for the lifetime of the low-lying excited states of O3. The A2 and B2 states dissociate with nearly all available energy appearing i...

Photofragment translational spectroscopy was used to study the photodissociation of the methyl perthiyl radical CH(3)SS at 248 nm. The radical was produced by flash pyrolysis of dimethyl disulfide (CH(3)SSCH(3)). Two channels were observed: CH(3) + S(2) and CH(2)S + SH. Photofragment translational energy distributions indicate that CH(3) + S(2) results from C-S bond fission on the ground state ...

UNLABELLED BACKGROUND Clinical translational medicine (CTM) is an emerging area comprising multidisciplinary research from basic science to medical applications and entails a close collaboration among hospital, academia and industry. FINDINGS This Session focused discussing on new models for project development and promotion in translational medicine. The conference stimulated the scientif...

In a single-component superfluid under rotation a broken symmetry in the order parameter space results in a broken translational symmetry in real space: a vortex lattice. If translational symmetry is restored, the phase of the order parameter disorders and thus the broken symmetry in the order parameter space is also restored. We show that for Bose-Einstein condensate mixtures in optical lattic...

We provide an update on the state of translational research in movement disorders, using examples of Huntington disease, Parkinson disease, and dystonia. While substantial progress in our understanding of these disorders has been achieved, development of neuroprotective treatments remains an unrealized goal. Here we highlight some of the emerging research areas that show the most promise for tr...

The state-to-state vibrational predissociation (VP) dynamics of the hydrogen-bonded ammonia-water dimer were studied following excitation of the bound OH stretch. Velocity-map imaging (VMI) and resonance-enhanced multiphoton ionization (REMPI) were used to determine pair-correlated product energy distributions. Following vibrational excitation of the bound OH stretch fundamental, ammonia fragme...