Stress Relaxation in Concentrated Solutions of Polymethyl Methacrylate: Molecular Weight Dependence

1956 ◽  
Vol 27 (7) ◽  
pp. 685-690 ◽  
Author(s):  
J. M. Watkins ◽  
R. D. Spangler ◽  
E. C. McKannan
Keyword(s):  
Molecular Weight ◽  
Stress Relaxation ◽  
Polymethyl Methacrylate ◽  
Concentrated Solutions ◽  
Molecular Weight Dependence

Molecular weight dependence of the conformational phase transition and electroluminescence of diarylpolysilane diodes

2000 ◽  
Vol 88 (6) ◽  
pp. 3408-3413 ◽  
Author(s):  
Satoshi Hoshino ◽  
Kazuaki Furukawa ◽  
Keisuke Ebata ◽  
Ingo Breyl ◽  
Hiroyuki Suzuki
Keyword(s):  
Phase Transition ◽  
Molecular Weight ◽  
Molecular Weight Dependence

Composition and molecular-weight dependence of the glass transition in polystyrene-poly(2,6-dimethylphenylene ether) blends

Polymer ◽  
1988 ◽  
Vol 29 (12) ◽  
pp. 2235-2243 ◽  
Author(s):  
Marco Aurelio de Araujo ◽  
Reimund Stadler ◽  
Hans-Joachim Cantow
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Molecular Weight Dependence

scholarly journals A theory relating the action of salts on bacterial respiration to their influence on the solubility of proteins

1947 ◽  
Vol 134 (875) ◽  
pp. 181-201 ◽  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Dehydrogenase Activity ◽  
Halophilic Bacteria ◽  
Convincing Evidence ◽  
Effect Of Temperature ◽  
Bacterial Respiration ◽  
Concentrated Solutions ◽  
Salting Out ◽  
Intact Cells

Evidence has been presented indicating that the action of concentrated solutions of salts on bacterial respiration may be partly explained in terms of salting-out. It has been suggested that the material upon which this action is exerted is probably one of the proteins concerned in respiration, perhaps a dehydrogenating enzyme. This theory provides satisfactory explanations for: ( a ) the relation between salt con­centration and rate of respiration or dehydrogenase activity; ( b ) the effect of temperature on this relation; and ( c ) the effect of pH on this relation, if it is further supposed that only the zwitterionic fraction of the protein is involved. The relative actions of various salts are in fair agreement with this suggestion, but provide no very convincing evidence either for or against it. The chief point of difficulty lies in the range of concentration over which the action is manifest. With halophilic bacteria, the evidence is consonant with the above view if the protein involved is one of high molecular weight. With normal organisms the salt concentra­tions are much lower than those causing salting-out. There is a little evidence that in normal organisms the dehydrogenating enzymes are less sensitive to salts than the intact cells, which may be the source of the discrepancy. No reason for this can yet be suggested, but the property must be absent from the enzymes of halophilic organisms, and whatever it is, its absence must be the foundation of the halophilic character.

Power law of molecular weight dependence of lateral growth rate of isotactic polypropylene

Polymer ◽  
2006 ◽  
Vol 47 (21) ◽  
pp. 7601-7606 ◽  
Author(s):  
Koji Yamada ◽  
Kaori Watanabe ◽  
Kiyoka Okada ◽  
Akihiko Toda ◽  
Masamichi Hikosaka
Keyword(s):  
Molecular Weight ◽  
Growth Rate ◽  
Power Law ◽  
Isotactic Polypropylene ◽  
Lateral Growth ◽  
Molecular Weight Dependence ◽  
Lateral Growth Rate
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