The phrase "altered by introducing" is correct and usable in written English.
It can be used when describing a change that occurs as a result of adding something new or different to a situation or context.
Example: "The experiment's results were altered by introducing a new variable that had not been considered before."
Alternatives: "modified by adding" or "changed through the introduction of".
The mechanical behavior of NWs is altered by introducing preset nano-twins,.
The selected sequences were altered by introducing glycine linkers with terminal cysteines at both amino and carboxyl terminus of the peptide designs.
Photochromic properties can be selectively altered by introducing structural modifications to the parent compound, namely, by varying substituents attached to certain positions.
Further molecular graphics studies and Mulliken's electron population analysis indicated that the energy level of ELUMO-b can be altered by introducing peripheral substituting groups on the meso-phenyl ring.
The second subgroup is altered by introducing controlled fold changes in the gene expression values.
Temperate grasslands originally dominated by caespitose (bunchgrass) species have been altered by introduced livestock, and are highly vulnerable to invasion by competitive annual and rhizomatous perennial exotic grasses (Mack 1989; Hayes and Holl 2003).
Today, there are remnants of this forest still extant, not only altered by many introduced species, but also not a true virgin forest because during the occupation by British and Hessian armies during the American Revolution the forests were entirely cut down on Manhattan Island to provide firewood and construction materials.
Based on the data presented here and from previous studies, the variations in cleavage activity of the various lengths of F2As are attributed to the nature of the region immediately upstream of F2A (18 30aa upstream of the cleavage site), altered by residues introduced by the cloning strategy, or, by the introduction of spacer sequences.
To assess whether this putative ARE sequence might be crucially involved in DAX-1 promoter responsiveness to androgens, site-directed mutagenesis was used to alter it by introducing nucleotide substitutions.
The government is altering the system by introducing a cap on welfare payments of £26,000 per household from next April and bringing in a "universal benefit", replacing the current range of out-of-work benefits.
Anthropogenic factors can alter hybridization dynamics by introducing new potentially hybridizing species or by diminishing barriers to hybridization.
