Reaggregation

Atterwill, C. K. (1989). Brain reaggregate cultures in netirotoxicological investigations Adap-tational and neurodegenerative processes following lesions. Mo/. Toxicol. 1, 489-502. 

Ehses M, Romerosa A, Peruzzini M (2002) Metal-Mediated Degradation and Reaggregation of White Phosphorus. 220 107-140... 

In particular it can be shown that the dynamic flocculation model of stress softening and hysteresis fulfils a plausibility criterion, important, e.g., for finite element (FE) apphcations. Accordingly, any deformation mode can be predicted based solely on uniaxial stress-strain measurements, which can be carried out relatively easily. From the simulations of stress-strain cycles at medium and large strain it can be concluded that the model of cluster breakdown and reaggregation for prestrained samples represents a fundamental micromechanical basis for the description of nonlinear viscoelasticity of filler-reinforced rubbers. Thereby, the mechanisms of energy storage and dissipation are traced back to the elastic response of tender but fragile filler clusters [24]. 

Metal-Mediated Degradation and Reaggregation of White Phosphorus... 

Reaggregation During processing, these particles must be kept from reaggregating or clumping up, thus destroying the benefits of the approach. 

Here are two of many known examples of specific cell-cell adhesion. The species-specific reaggregation of dissociated cells of marine sponges (Chapter 1) depends upon a 20-kDa proteoglycan of unique structure209-211 together with a cell surface receptor protein and calcium ions. The recognition of egg cell surfaces by sperm212-214 is species... 

The effects of dissociating agents have been described. In 6 M guanidine hydrochloride a value of 83,300 was found (14), but this value was probably the result of partial reassociation (43). Urease dissociates even in 3 M guanidine hydrochloride to (2n) subunits of 60,000 daltons (7), but it reaggregates upon standing. 

In both of these situations there was opportunity for partial reduction of disulfide bonds before polypeptide refolding and reaggregation began as the guanidine salt diffused out of the dialysis sac. 

Reaggregation, however, occurs much slower, primarily in undiluted polymers and at high polymer concentrations, because the styrene content of the aggregates elevates the transition temperature and thus reduces the chain mobility. The reaggregation slows down as it progresses. 

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