The densities and viscosities of the binary mixtures of JP-10 + n-octane and JP-10 + n-decane were determined from T = 293.15 K to T = 313.15 K at atmospheric pressure, over the entire composition range. Excess volume V
m
E of the binary mixtures was calculated. The experimental data indicate that the addition of n-alkane has a distinct effect on the density and viscosity of JP-10, and V
m
E values of the binary systems are negative. Experimental data were fitted to the Redlich−Kister equation, and the adjustable parameters and the standard deviations between experimental and calculated values were estimated. Conclusions were qualitatively discussed in terms of molecular interactions. The viscosity data have been correlated with several semiempirical equations, and the Grunberg−Nissan equation gives satisfactory results.
Densities and viscosities of exo-tetrahydrodicyclopentadiene + n-undecane and exo-tetrahydrodicyclopentadiene + n-tetradecane were measured at different temperatures of (293.15, 298.15, 303.15, and 313.15) K and atmospheric pressure over the entire composition range. The excess molar volumes V m E and deviations in viscosity δη for the mixtures were calculated from the experimental data and fitted to the Redlich-Kister equation, and the regression coefficients and the standard deviations of the fits were given. The viscosity data were correlated with several semiempirical equations, and the double-parameter McAllister equation gives satisfactory results.
While aging is associated with increased knowledge, it is also associated with decreased semantic integration. To investigate brain activation changes during semantic integration, a sample of forty-eight 25–75 year-old adults read sentences with high cloze (HC) and low cloze (LC) probability while functional magnetic resonance imaging was conducted. Significant age-related reduction of cloze effect (LC vs. HC) was found in several regions, especially the left middle frontal gyrus (MFG) and right inferior frontal gyrus (IFG), which play an important role in semantic integration. Moreover, when accounting for global gray matter volume reduction, the age-cloze correlation in the left MFG and right IFG was absent. The results suggest that brain structural atrophy may disrupt brain response in aging brains, which then show less brain engagement in semantic integration.
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