| http://www.w3.org/ns/prov#value | - Solid matrix material, such as but not limited to sponge-like material, silica, silica powder, silica filter paper, absorbent powder, or filter paper or other matrix materials as described herein can be added to the wells and will allow the introduction of biological materials, according to non-limiting theory, by absorption, adsorption, specific or non-specific binding or other mechanism of attac
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