The phrase "a decrease in penetration" is correct and usable in written English.
It can be used in contexts discussing market analysis, research findings, or any situation where a reduction in the extent of influence or reach is being described.
Example: "The latest report indicates a decrease in penetration of our product in the target market, suggesting the need for a revised marketing strategy."
Alternatives: "a reduction in reach" or "a decline in access".
Accordingly, this patient's data were provisionally removed, resulting in miniscule changes to the median rate of femoral head penetration (a decrease in proximal penetration of 0.006 mm/year and a decrease in MTPM penetration of 0.007 mm/year).
The mechanical property enhancements provided by the coating have been quantitatively estimated including the fractional support of the contact load by the coating which contributes to a decrease in contact penetration at a given load.
When applied the continuous anodic current, the TiO2 layer might be deposited at the entrance to the pores, leading to a decrease in the penetration of electrolyte into the pores of the porous TiO2 film.
Worldwide and at different times during Earth history, in-depth studies of drowning unconformities revealed that changes in nutrient input, clastic delivery, temperature, or a combination of them may be responsible for a decrease in light penetration in the water column and the progressive suffocation and poisoning of photosynthetic carbonate producers.
On the other hand, an increase in the catalyst loading increases the solution opacity and leads to a decrease in the penetration of the photon flux in the reactor and thereby decreases the photocatalytic degradation rate (Kamble et al. 2003; Gogate and Pandit 2004).
If focusing on the older age group also leads to a decrease in vaccine penetration (60%), then program effectiveness drops further to a 50.9% decrease in lifetime cervical cancer cases in this cohort.
An upregulation of P-gp in rat brain endothelium was also observed in an inflammatory pain model causing a decrease in the penetration of the P-gp substrate, morphine and consequent antinociception (Seelbach et al., 2007).
Results revealed a direct relationship between orifice exit area reduction and a decrease in hot jet penetration speed.
The reason for such a decrease in the chloride ion penetration depth is because the addition of SF cause considerable pore refinement i.e. transformation of bigger pores into smaller one due to their pozzolanic reaction concurrent with cement hydration.
