The phrase "alteration by a" is correct and usable in written English.
It can be used when discussing changes or modifications made by a specific agent or entity.
Example: "The alteration by a skilled artisan can significantly enhance the value of the artwork."
Alternatives: "modification by a" or "change made by a".
Phenotypic alteration by an organism in an imposed condition has been considered an important strategy for better adaptation [29].
"Ecosystem engineering" describes habitat alteration by an organism that affects another organism; such nontrophic interactions between organisms are a current focus in ecological research.
α7 nAChR activation ameliorated these alterations by a mechanism involving heme-oxygenase I induction.
Combined with the earlier observation that small polar organic compounds can migrate across mineral surface water films, this provides support for the hypothesis that initially water-wet mineral surfaces can undergo wettability alterations by a two-stage process, involving initially the establishment of a surfactant layer by small polar organic molecules replacing water at the mineral surface.
Several parasites are known to cause ZO-1 alterations by a wide array of mechanisms [ 33, 53, 54].
Our first formulation involves nucleotide-level alignment that can detect structural alterations by a single-unified dynamic programming approach.
The array CGH analysis data were evaluated to identify genomic alterations by a statistical analysis with Genomic Workbench Standard Edition version 5.0.14 (Agilent).
However, we only found one alteration by aCGH, a 1.2 MB gain in SCZP-hiPSC that was maintained in the NPC, suggesting that genes in this region may not be essential for the initial stages of neuron differentiation.
However, South Africa's second-innings total in a 1906 Johannesburg Test has been retrospectively changed by one run - an alteration supported by a surviving scorebook - which would make Dean Jones's single off the ball before the crucial run.
