The small amyloid-forming GNNQQNY fragment of the prion sequence has been the subject of extensive experimental and numerical studies over the last few years. Using unbiased molecular dynamics with the OPEP coarse-grained potential, we focus here on the onset of aggregation in a 20-mer system. With a total of 16.9 μs of simulations at 280 K and 300 K, we show that the GNNQQNY aggregation follow...

Using the standard, low pressure, discharge-flow technique, with resonance fluorescence in the vacuum ultraviolet to observe Cl atoms, rate constants have been determined for the reaction of Cl atoms with O3 at temperatures down to 184 K. The measured rate constants for 298184 K fit the Arrhenius expression: k(T) = (3.6 ± 0.7) × 10 exp(( 310 ± 50 K) / T) cm molecule s. The results extend the d...

This study examines the thermal performance of a two-dimensional borehole system, featuring U-shaped pipe embedded in porous soil, through application computational fluid dynamics. The investigation encompasses 24 cases, assessing impact various factors such as soil conductivity (k = 1.5, 1.84, 2 W/mK), average temperature (T 280-285 K), and moisture content (10%-55%) on ice formation heat tran...

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