Semi-solid heterogeneous systems

Semi-Solid Heterogeneous Systems (Mold Spore Germination).177... 

In this investigation, three main focus areas are reported (1) S. aureus growth in homogeneous liquid media system, (2) mold spore germination in heterogeneous semi-solid starch-sugars and cellulose-sorbose systems with, and (3) survival of organisms in freeze-dried locust bean and xanthan... 

The attention paid to the polymer solid state is minimized in favour of the melt and in this chapter the static properties of the polymer are considered, i.e. properties in the absence of an external stress as is required for a consideration of the rheological properties. This is addressed in detail in Chapter 3. The treatment of the melt as the basic system for processing introduces a simplification both in the physics and in the chemistry of the system. In the treatment of melts, the polymer chain experiences a mean field of other nearby chains. This is not the situation in dilute or semi-dilute solutions, where density fluctuations in expanded chains must be addressed. In a similar way the chemical reactions which occur on processing in the melt may be treated through a set of homogeneous reactions, unlike the highly heterogeneous and diffusion-controlled chemical reactions in the solid state. 

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