Nano/Micro Science and Technology in Biorheology: by Rio Kita, Toshiaki Dobashi

By Rio Kita, Toshiaki Dobashi

Integrating easy to utilized technology and know-how in medication, pharmaceutics, molecular biology, biomedical engineering, biophysics and irreversible thermodynamics, this publication covers state-of-the-art learn of the constitution and serve as of biomaterials at a molecular point. additionally, it examines for the 1st time experiences played on the nano- and micro scale. With leading edge applied sciences and methodologies aiming to explain the molecular mechanism and macroscopic courting, Nano/Micro technology and know-how in Biorheology completely covers the elemental ideas of those reviews, with precious step by step motives of methodologies and perception into scientific purposes. Written via pioneering researchers, the ebook is a helpful source for teachers and scientists, in addition to graduate scholars, operating or learning in bio-related fields.

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Additional resources for Nano/Micro Science and Technology in Biorheology: Principles, Methods, and Applications

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91] considered the effect of the end-group structure of PNIPAM. In many studies, NIPAM samples have been synthesized using ammonium persulfate as an initiator. They studied the effect of salt addition on the mesoglobule formation and argued that, despite the small number of ionic end groups of PNIPAM, these charges may be situated on the surfaces of PNIPAM mesoglobules, thus significantly contributing to the stability. However, Aseyev et al. [88] observed mesoglobule formation for PNIPAM homopolymers bearing a neutral end group.

Here, the interaction range l0 is assumed to be equal to agg1/2 [78], although l0 would be much smaller than agg1/2. Then, the ratio τent/τcont ~ (a3N3ϕ3/2)/(agg3/2) is roughly estimated to be 105. The result τent/τcont >> 1 indicates the contribution of the viscoelastic effect to the slow aggregation of PMMA. As shown in Figs. 12b, plots for higher concentrations can be represented by straight lines, indicating the exponential growth of clusters: Mw,agg ~ eGt and agg ~ eHt, where G and H are coefficients independent of time.

They studied the effect of salt addition on the mesoglobule formation and argued that, despite the small number of ionic end groups of PNIPAM, these charges may be situated on the surfaces of PNIPAM mesoglobules, thus significantly contributing to the stability. However, Aseyev et al. [88] observed mesoglobule formation for PNIPAM homopolymers bearing a neutral end group. Another mechanism of the colloidal stability is related to the translation entropy of polymer chains [88]. A polymer in a poor solvent optimizes its interaction energy via the intermolecular association among polymer chains, which results in a decrease in the translational entropy of the chains.

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