Due to the large heats involved and the closeness of the transitions, there is considerable overlap between the broadened transition peaks for the 10 K min(^{-1}) data.
DMA results showed an increased tan δ peak temperature and broadened transition peak, indicating restrained PHBV molecular mobility in the vicinity of the CNW surface.
In agreement with the structural design, the samples showed inhomogeneously broadened transition lineshape arising from the disorder, which is not only efficient for the absorption of blue LED sources, but also insensitive to temperature variations.
Thus, the broadened transitions observed by DSC for GOE-PASs are a consequence of their polymeric structure and, more specifically, may be related to the molecular weight range (10 50 kDa) that was investigated, as studies on THC have shown this molecular weight range to display broadened transitions relative to longer polymers.
Many of the residues exhibiting resonance doubling also participate in conformational line-broadening transition(s) that occur ~10-fold more rapidly, proposed previously to arise from a single global process.
The timeframe for the slow conformational exchange differs by five orders of magnitude from that for the fast limit line-broadening transition (τ≈100 μs) [ 13, 14] discussed above.
The 1.70 Å (1 Å=0.1 nm) resolution X-ray structure of the H87V variant is strikingly similar to that of FKBP12, yet this substitution quenches the slow conformational transition throughout the protein while quenching the line-broadening transition for residues near the 80′s loop.
In general, a DSC heating experiment will broaden the transition region, overestimate the transition temperature and associate more heat with the high-temperature part of the transition region.
An oriented, intermediate phase, discovered by solid state NMR and full-pattern X-ray analysis, gives rise to a substantially broadened glass transition that reaches to about 300 K, compared to the glass transition of the amorphous polyethylene with a midpoint at 237 K and end at 250 K.
The GROMOS microwave radiometer detects the thermal emission of the pressure broadened rotational transition of ozone at 142.175 GHz.
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