| http://www.w3.org/ns/prov#value | - By way of example, in some embodiments the unitary barrel may be constructed from various types of plastic, metal, stainless steel, glass (e.g., borosilicate glass), PTFE, the fluoropolymer PFA (e.g., perfluoroalkoxy polymer resin), the Dyneon??? TFM??? range of chemically-modified PTFE, aluminum, polyetheretherketone (PEEK), fluorinated ethylene propylene (FEP) 1 fluoro-treatecl high-density poly
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