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First principles calculation and Boltzmann transport theory have been combined to investigate the fundamental influence of internal displacement (u) on lattice stability, band structure, phase transition, and thermoelectric properties of Bi. Calculation reveals that Bi could keep its ground-state rhombohedral structure and mechanical stability within the entire studied range of u (0.2150 ≤ u ≤ 0.2500)...
The expression of β-site APP-cleaving enzyme 1 (BACE1) is increased in the brain of late-onset sporadic Alzheimer’s disease (AD) and oxidative stress may be the potential cause of this event. The phenolic glucoside gastrodin (Gas), a main component of a Chinese herbal medicine Gastrodia elata Blume, has been demonstrated to display antioxidant activity and suppresses BACE1 expression. However, the...
We demonstrate notch filters in polymer fiber Bragg gratings for use at THz frequencies. The filters were created by introducing a π/2-phase shift into narrowband Bragg gratings manufactured in Topas polymer subwavelength fiber. Experimental results are presented and compared with a model of the filter.
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