The dressing effect due to the quantum nature of phonons may cause the creation of bound states of several vibrons in the molecular chain. The possibility of creating soliton states of this type is discussed for the simple Fröhlich one-dimensional model. The regions of the system parameter space where different mechanisms dominate the behaviour of such entities are characterized.
Bentonite clays have many applications in industries ranging from
construction to cosmetics. Addition of polymers can profoundly influence the
properties of bentonite suspensions and we now describe the influence of a
range of different polymers. Whereas polyvinyl pyrolidone and soy isolate
only slightly influenced the pH and the electrical conductivity of bentonite
polymers in suspension, Carbopol solution caused decreases in both pH and
electrical conductivity. As expected, strong electrolytes like sodium
chloride caused big changes in the electrical conductivity of the
suspensions. When the temperature of the bentonite suspensions was increased,
the pH was almost unchanged, but the electrical conductivity increased.
Bentonite treated with polymer suspensions can be used in purifying polluted
water; for example, our results suggest that high pH caused by phosphorous
salts can be addressed using bentonite modified with Carbopol. [Projekat
Ministarstva nauke Republike Srbije: Stanisa Stojiljkovic, Vojkan Miljkovic,
Goran Nikolic, Ivana Savic and Ivan Savic, TR 34020, Danijela Kostic 172047
and Biljana Arsic 174007]
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