Reduced mobility

Similar, very detailed studies were made by Ebert [112] on water adsorbed on alumina with similar conclusions. Water adsorbed on zeolites showed a dielectric constant of only 14-21, indicating greatly reduced mobility of the water dipoles [113]. Similar results were found for ammonia adsorbed in Vycor glass [114]. Klier and Zettlemoyer [114a] have reviewed a number of aspects of the molecular structure and dynamics of water at the surface of an inorganic material. 

It was shown 15,161 that, as the filler-volume fraction is increased, the proportion of macromolecules, participating in this boundary layers with reduced mobilities, is also increased, so that the number of macromolecules participating in the Tg-process is reduced. This is equivalent to a relative increase of ur... 

It is primarily the prospect of reduced mobility and volatility, with the expected improvement in long-term performance, which motivates the preparation of polymeric ultraviolet stabilizers. Work in this area was reviewed thoroughly by Bailey and Vogl in 1976 (1), and more recently by the author (2). The present paper describes recent synthetic work involving four classes of effective ultraviolet stabilizers salicylate esters (I), 2-hydroxybenzophenones (II), a-cyano-3-phenyl-cinnamates (III) and hydroxyphenylbenzotriazoles (IV). In each... 

All died in 23 weeks reduced mobility prior to death 37... 

The SSP of PEN and co-polyesters based on 2,6-naphthalene dicarboxylic acid requires prolonged reaction times, which is obviously related to the rigidity of the monomers and therefore to both the reduced mobilities of the end groups and diffusion. Only a few detailed reports exist in the literature on this subject [31, 32], It should be noted that the analysis of PEN can become complicated due to its reduced solubility. 

Two dissimilar groups attached to two atoms that are in turn linked by a double bond or ring creates geometric isomerism because of the reduced mobility of the double bond or ring. 

Use premixed mobile phases for isocratic analysis to reduce mobile phase variations. 

Their reduced mobility allows them to be used in the study and mimicry of protein folding and serve as valuable models for gaining conformational insight into the properties of larger peptides and proteins. ... 

As discussed previously, a strong preference by Mn for octahedral over tetrahedral coordination should result in reduced mobility for Mn through a ccp oxygen framework. A reduced mobility for Mn in turn could increase the resistance of metastable chemically substituted Mn oxide structures against structural transformation. 

Kruhlak, M.J., Lever, M.A., Fischle, W., Verdin, E.., Bazett-Jones, D.P., and Hendzel, M.J. (2000) Reduced mobility of the alternate splicing factor (ASF) through the nucleoplasm and steady state speckle compartments. J. Cell. Biol. 10 150(1), 41-51. 

Fig. 13. Schematic representation of the influence of the hydrophilic spacer on the area occupied by the lipids in the monolayer. High mobility of the spacer requires large areas in the fluid phase (left). Reduced mobility of the spacer results in a decrease of the area occupied (right) [172]...

However, the complete elimination of the radicals is problematic, because their stability and hence their lifespan is enhanced by various kinetic or thermodynamic effects. For instance, alkyl groups have a stabilizing action and there is also a steric intervention by substituents with a blocking action or reduced mobility owing to strong crosslinking. Thus, some radicals hardly have any opportunity for recombination and remain isolated in the matrix. 

However, by no means are microbore HPLC columns nonoptimal when sample volumes are limited. Because of the substantially reduced mobile-phase volumes necessary to carry out a given separation, microbore columns are more easily interfaced to many useful detection systems, for example, electron-capture detectors, nitrogen-specific thermionic detectors, and mass spectrometers. 

This order is associated with chain alignment or, as previously seen, with a reduced mobility of the network strands. 

---