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bioactivity

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bi·o·ac·tiv·i·ty (b-k-tv-t)
n.
The effect of a given agent, such as a vaccine, upon a living organism or on living tissue.

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Relative Binding Affinity-serum Modified Access (RBA-SMA) Assay Predicts the Relative In Vivo Bioactivity of the Xenoestrogens Bisphenol A and Octylphenol," Environmental Health Perspectives 105, no.
QD absorption, distribution, metabolism, excretion, and toxicity depend on multiple factors derived from both inherent physicochemical properties and environmental conditions; QD size, charge, concentration, outer coating bioactivity (capping material and functional groups), and oxidative, photulytic, and mechanical stability have each been implicated as determining factors in QD toxicity.
Solids often come with a supplier-added dispersant and/or biocide, so check for particle size distribution and bioactivity to verify these additives are working.
 
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