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In this study, a 2 4 factorial experimental design was employed in order to evaluate the influence of the reaction conditions and preparation method on alginate–chitosan hydrogel properties. Alginate content, pH, chitosan molecular weight and the hydrogel preparation method were the independent variables and the reaction yield, particle size, swelling degree and point of zero surface charge...
Recently, Griess and Serwer (1998. Biophys. J. 74:A71) showed that it was possible to use trapping electrophoresis and unbiased but asymmetrical electric field pulses to build a correlation ratchet that would allow the efficient separation of naked DNAs from identical DNAs that form a complex with a bulky object such as a protein. Here we present a theoretical investigation of this novel macromolecular...
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