The Oldroyd-B model has been used extensively to predict a host of instabilities in shearing flows viscoelastic fluids, often realized experimentally using polymer solutions. present review, written on the occasion birth centenary James Oldroyd, provides an overview found across major classes flows. These comprise (i) canonical rectilinear including plane Couette, and pipe Poiseuille flows; (ii...

.................................................................................................................................. iii CONTENTS ................................................................................................................................... vi 1 INTRODUCTION AND LITERATURE REVIEW ............................................................... 1 1.1 Introduct...

A series of polypeptoid homopolymers bearing short (C1–C5) side chains of degrees of polymerization of 10–100 are studied with respect to thermal stability, glass transition and melting points. Thermogravimetric analysis of polypeptoids suggests stability to >200 °C. The study of the glass transition temperatures by differential scanning calorimetry revealed two dependencies. On the one hand an...

Polymerization processes with high reproducibility, traceability, and nontoxic compounds are required for biomedical applications. Here an automated solvent-free polymerization of hyperbranched polyglycerol has been established on a multiple-hundred gram scale. Performed is anionic ring-opening multibranching (ROMB) slow addition glycidol. The approach avoids commonly used organic solvents duri...

The ability of three known probiotic strains (two lactobacilli and one bifidobacterium) to ferment fructooligosaccharides (FOS) from yacon roots (Smallanthus sonchifolius Poepp. Endl) was compared to commercial FOS in this study. Results indicate that Lactobacillus acidophilus NRRL-1910, Lactobacillus plantarum NRRL B-4496, and Bifidobacterium bifidum ATCC 15696 were able to ferment yacon root ...