A statistically significant decrease in the density of DCN and PVCN neurons (25%) was found at 24 months of age compared to the one month old animals.
The decrease in the grain size from 7.5 to 3.8 μm resulted in a significant decrease in the density, size, and volume fraction of cavities.
It consists of a slight increase in the particle size and a slight decrease in the density, which can be both explained by an Ostwald ripening mechanism.
During seismic affected period, considerable decrease in the density of heavier ion - O+ and increase in the ion temperature (Ti) is observed during all the selected events.
The results pointed out that it was possible to observe significant decrease in the density and increase in some specific mechanical properties by controlling the extrusion foaming process.
As the Pioneer 10 spacecraft sped toward its closest approach to Jupiter in 1974, it detected a sudden decrease in the density of charged particles roughly 125,000 km (78,000 miles) from Jupiter, just inside the orbit of its innermost moon, Metis.
Treatment of as-made zeolites with NH4F led to a significant decrease in the density of siloxy framework defects but silanol groups could not be totally eliminated, even after calcination.
Upon annealing, the tendency was revealed towards coalescence within the set of particles, i.e. increase in the particle average diameter and decrease in the density of particles with time.
The aged passive layer becomes more resistant to pit initiation, due to either a decrease in the density of active sites or a decrease in the nucleation rate constant for pit initiation.
This thus leads to a decrease in the density of grain boundaries in the film.
However, the decrease in the density directly influenced the mechanical properties of the composites.
