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Liquid absorption verification

Since the earlier treatments of this problem by Ramachandran and Sharma(4) and Uchida et.al.(7).several experimental studies and verifications of predictions of enhancement factors have been reported(7,15,16) several detailed models based on film concept have also been proposed(7-12).Recently a penetration model for an instantaneous irreversible chemical reaction has also been presented.which however differs numerically only negligibly than the film model(13).The most important modification of Ramachandran and Sharma s treatment is due to Uchida et. al.(7-9) who consider that the rate of solid dissolution may be accelerated by the absorption of gas as discussed above.They have also considered the case where the concentration of solid component in the bulk liquid phase may not be maintained at the saturation solubility(that is,"finite" slurry) which occurs of course when the rate of solid dissolution is relatively slow compared with gas absorption rate(8).The case where the solid dissolution is finite was further considered by Sada et.al.(12) both theoretically and experimentally.Uchida et.al.(8) could also explain the data of Takeda et.al.(14) by their modified model.Analytical solutions presented above are for instantaneous reactions ... [Pg.880]

The characterisation of a stimulus responsive surface in general includes two aspects verification of the surface composition and evaluation of the materials response due to the presence of the stimulus. Although a variety of techniques are available to characterise peptides and their stimulus-responsive properties in solution and in bulk, many of these are not compatible with surface-immobilised peptides. Hence, a conunon approach is to characterise the peptide material in solution before attachment to the surface. UV-based turbidity measurements (Lee et al., 2009 Nath Chilkoti, 2003 Teeuwen et al., 2009) and calorimetry (Barbosa et al., 2009) are used to determine the LCST of ELPs. The isomerisation of azobenzene can be stndied with UV absorption, nuclear magnetic resonance spectroscopy, and high-performance liquid chromatography (Auemheimer et al., 2005 Hayashi et al., 2007), and CD is used to determine the presence of helices in a peptide (Minelli et al., 2013 Yasutomi et al., 2005). Nonsolution-based methods that can be used to characterise responsive peptide surfaces will be discussed in more detail below. [Pg.85]


See other pages where Liquid absorption verification is mentioned: [Pg.96]    [Pg.301]    [Pg.367]    [Pg.160]    [Pg.149]    [Pg.96]    [Pg.96]    [Pg.181]    [Pg.333]   
See also in sourсe #XX -- [ Pg.5 ]




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