The phrase "alter over a" is not correct and does not convey a clear meaning in written English.
It is unclear when to use it due to its lack of context and coherence.
Example: "The plan will alter over a period of time."
Alternatives: "change over a" or "modify over a".
Some epoxies have altered over a relatively short period of time and dramatically changed the appearance of the sculpture, while other synthetic consolidants have proved unable to penetrate deeply enough into the stone, and their application has resulted in a thin, dense, and impermeable crust that falls away owing to the buildup of salts or water vapour behind it.
Second, macrophage activity may alter over time as a consequence of tumour-induced immune dysfunction, since nitric oxide production, which is a major effector molecule for tumour cell killing, was suppressed in macrophages of tumour-bearing mice [ 32].
Once a rule is implemented its adoption may alter over time.
Given the changing demography of the student population, this may alter over time.
The chemical may be introduced at a precise time, the dose can be altered over a large range and the chemical may be removed simply by replacing the medium surrounding the embryo.
Figure 5 also showed that the point of transition from high viscosity to low viscosity was sharp, and the shear stress level could be altered over a modest range by changing the hydrophobicity and the amount of the added nanoparticles.
In two cell lines gene dosage was altered over a chromosomal region that spanned 14 genes on mouse chromosome 17.
Transfusion use was not altered over a 28-day period following administration of tranexamic acid.
The remaining lines showed variable fractions of the genome altered over a continuum; no discrete categories could be identified.
