| http://www.w3.org/ns/prov#value | - ps, vacuums, suction, air pressure, electrostatic attraction or repulsion, hydrophobic or hydrophilic interaction, electromagnetic coercion, osmotic pressure, centripetal acceleration, localized heating or cooling, charged gas bladders and so forth. [0011] In at least one embodiment, the means for directing is a structure that directs the sample from a source for the sample toward the surface of t
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