This article is unavailable. Pinkrah, V.T., Snowden, M.J., Mitchell, J.C., Seidel, J., Chowdhry, B.Z., Fern, G.R. Physicochemical properties of poly(N-isopropylacrylamide-co-4-vinylpyridine) cationic polyelectrolyte colloidal microgels, (2003) Langmuir, 19(3), 585-590. If you wish to obtain a copy please contact the author below: George.Fern@brunel.ac.uk