The phrase "additive is demonstrated" is correct and usable in written English.
It can be used in contexts where you are discussing the proof or evidence of an additive effect or property in a scientific or analytical setting.
Example: "In the study, the additive is demonstrated to enhance the overall effectiveness of the treatment."
Alternatives: "additive is shown" or "additive is evidenced".
The concept of additive manufacturing of thermosets is demonstrated by completing a novel deposition-and-scan technique that results in a patterned structure of cured epoxy.
The technique is demonstrated for pairwise-additive, 1/r interparticle potentials in Cartesian coordinates, and a general Mathematica® package is provided to derive the modified expansion coefficients symbolically.
Its optimality is demonstrated with respect to a generic additive metric.
The highest amount of functional TF in plasma was noted at shear rates between 1000 2000 s−1 but no additive effect was demonstrated when agonists were combined.
Because of bortezomib's distinctive mechanism of action, there was interest in combining this with standard anti-leukemia agents, and synergistic or additive interactions were demonstrated with range of chemotherapeutic agents in T-ALL and pre-B ALL cell lines in vitro [50].
Combining irradiation and cetuximab exposure, a synergistic and/or additive effect could be demonstrated in NSCLC cell lines in vitro [ 10].
In addition, the usefulness of the synthesized CPHE-AgNPs as antimicrobial additive in emulsion paint was demonstrated.
Such additive effects can also be demonstrated among "normal" people in the laboratory; for example, one may readily produce signs of hallucinations among sleep-deprived subjects or among subjects in a state of sensory isolation by administering otherwise subhallucinatory doses of drugs such as LSD or mescaline.
Additive alloy melting (ADAM) has been demonstrated to be a suitable, rapid and versatile casting method for manufacturing metallic samples on a laboratory scale with good chemical homogeneity at the macro-scale.
Although influenced by environmental conditions (e.g. Olsson et al. 2006), the adoption of alternative life-history tactics in salmonids involves significant additive genetic variation, which has been demonstrated both in the laboratory (Silverstein and Hershberger 1992; Heath et al. 1994; Wild et al. 1994) and in the field (Garant et al. 2003; Thériault et al. 2007b).
