| http://www.w3.org/ns/prov#value | - As described above, the porous membrane may be treated so as to be provided with a hydrophilicity by being dipped in a treatment solution such as, for example, hydrophilic polymers such as hydroxypropylcellulose (HPC), polyvinyl alcohol (PVA), carboxymethylcellulose (CMC), or the like, lecithin, a surfactant, or the like.
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