Aggregation, probability

On die basis of molecular welglit determinabons by ayoscopy In THE and conductlvdy measutemetiis. It was conduded diat die polymeric dialn breaks up in solution to form smaller aggregates, probably giving rise to solvent-separated... 

Eli Ruckenstein Various time scales have to be compared to obtain an answer to this question. If the relaxation time to attain equilibrium is short compared to the time scale determined by the fluid mechanics, local thermodynamic equilibrium can be assumed. Such an assumption can be made for micellar solutions because the surfactant aggregation and the dissociation of aggregates are relatively rapid processes. It is, however, expected that the size of the aggregate will depend on the stress. For concentrated dispersions, the problem may be more complicated because the processes of aggregation and dissociation of aggregates probably are much slower. 

The crystalline aggregates, probably the fringed micelle crystallites, act as physical crosslinks and decrystallize at elevated temperatures. RIM elastomers containing a higher content of rigid crystallizing segments show more resistance to thermal decay. 

Analysis of the products of the thermal unfolding reaction revealed that after the appearance of the unfolding intermediate, recovery of the chains decreased due to aggregation. This aggregation probably resulted from the partially unfolded monomeric chains formed from the dissociation of the mtermediates. The aggregation of the partially denatured chains rendered the kinetic analysis difficult. 

The process can be disaggregated with analytical tools —such as fault trees, event trees, and various stochastic models— into subprocesses, for which good statistical evidence is available. Aggregate probabilities can then be constructed. No good data are available for the process under consideration, but good data are available for a similar process and these data may be adapted or extended for use either directly or as part of a disaggregated model. 

In the case of plasmid duplex DNA, MgC probably induces the aggregation of the ssDNA produced by denaturation at high temperature. Indeed, such aggregation does not take place when KCl is also present (concentrations as low as 25 mM KCl are sufficient to prevent aggregation, probably because, in combination with MgCh, it prevents denaturation at high temperature). 

Hazard probability The aggregate probability of occurrence of the individual hazardous events that create a specific hazard (MIL-STD-882). 

In the last ascending part of the curve, some of the interparticle material in the chain-Uke aggregates probably dissolves and separates into individual particles, which grow into nanometre-sized coUoidal composite calcium carbonate. 

Reihs and coworkers [17] reported nanoparticular complexes between PDADMAC or PLL and copolymers of maleic acid at n ln = 0.6, which increased in size from around 60 to 120 nm by increasing Cpel- This was explained by subsequent exceeding of the overlap concentration of either of the PEL components, which increased the complexation and aggregation probability. 

A. Salicylates - Evidence has been given that aspirin increases bleeding time and decreases blood platelet aggregation, probably by virtue of the acetoxy group. On the other hand, in oxidative phosphorylative uncoupling in mitochondria, the action is due to the salicylic acid moiety. ... 

Since this is still an aggregate, probably medium-term, exercise there is room for adjustment as we get closer to real demand,... 

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