The phrase "an initial decrease at" is correct and usable in written English.
It can be used when discussing a reduction or decline that occurs at the beginning of a specific time period or event.
Example: "The data showed an initial decrease at the start of the experiment, followed by a gradual increase."
Alternatives: "a preliminary drop at" or "an early decline at".
There was an initial decrease at 3 h after inflammation and a subsequent increase after inflammation in the excitability of RVM neurons and the inhibition of nocifensive responses.
Likewise, idh3a showed its greatest expression at 3 hours (148%), after an initial decrease at 1 hour.
Frataxin mRNA levels were still stable 6 hours after removing the drug, they showed an initial decrease at 12 hours and returned to the pre-treatment baseline 24 hours after drug removal.
After an initial decrease at 3 and 6 months, PCDD/F total body burden increased slightly but significantly at 12 months after versus before surgery (p < 0.01).
In contrast, c-Myc-infected cells regained a mitotic index (∼4%) that is comparable to the untreated population at the 24 h time-point, following an initial decrease at the 12 h time-point.
Also, broadly speaking there were increases in the proportion of B cells (following an initial decrease at 14 dpi) and reductions in the proportions of various T cell subpopulations (CD4+, CD8+ and δγ T cells) over the course of infection.
For intermediate and high oxygen fractions, an initial decrease in hardness at 600 °C annealing is followed by an inversion at the highest temperatures (700 and 800 °C, respectively), resulting from possible oxide phases crystallization, defect annealing at high temperatures and some extended phase segregations.
The reactions of all mutant enzymes, except R174A, showed an initial decrease in absorbance at 420 nm followed by a large increase.
When renal dysfunction was combined with cardiac dysfunction in CRD, besides an initial decrease, proteinuria progressed at the same rate as in RD.
Of note, the impact of Natalizumab as measured by decrease of CD49d SFI on T cells directly correlates with the presence of neutralizing antibodies against Natalizumab: one patient in our cohort showed an initial decrease of CD49d immunoreactivity at M1, followed by a return to baseline at M6 (Supplementary Figure S1).
The temperature dependence of the relative resistivity of isotropic high-density graphite, extruded graphite and graphite sheets showed an initial decrease to a minimum at around 600 °C followed by a linear increase up to 3000 °C.
