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(A) Co-axial ES apparatus for generation of acetalated dextran (Ac-DEX) microparticles encapsulating the adjuvant resiquimod and a protein antigen in a single microparticle [11]. (B) Co-axial needle [12] and (C) Tetra-axial needle [12]. The Taylor cone would be created at the right-hand tip, with Luer-Lock style imports at the left and facing down.
