The phrase "alteration in amount" is correct and usable in written English.
It can be used in contexts where you are discussing changes or modifications to a quantity or sum, often in financial or statistical discussions.
Example: "The report indicated a significant alteration in amount compared to the previous quarter's figures."
Alternatives: "change in quantity" or "modification in sum."
Similarly, there was no detectable alteration in total amounts and phosphorylation of the key insulin-signaling enzymes in the heart and adipose tissue.
To investigate whether alterations in amounts of splicing factors are followed by changes in alternative processing of target genes, we analyzed their splicing patterns (Fig. 5).
This alteration in the amount of soil separates is possibly due to selective feeding, physical grinding by gizzard and redistribution of soil particles by means of earthworms casting activities (Edwards and Bohlen 1996).
This alteration in the amount of mandibular growth during active treatment was associated with a significantly greater increase in the SNB angle (0.7°) and a significantly greater decrease in the ANB angle (−1.1°) that remained stable in the follow-up (T1-T3 change, 0.9°, and −0.6°, respectively).
According to the present study, the enhanced CO concentrations and alteration in the amount and partitioning of O/H radicals, rather than direct reactions between N-radicals and CO2, are responsible for the effect of a high CO2 concentration on ammonia conversion.
In both E13.5 PGCs and 3dpp sprmatogonia, expression levels of Gapdh were also comparable between DicerCKO and controls (Figure3D), demonstrating that results of retrotransposon expressions were not due to alteration in the amount of Gapdh transcript.
No marked alteration in GSSG amount was observed in FRO and KTC2 cells within 24 hours.
Importantly, we did not observe any striking alteration in the amount of cohesins present on interphase chromatin assembled in the depleted extracts.
