Strings of particles

Identify the daughter nuclides in each step of the radioactive decay of uranium-235, if the string of particle emissions is a, p, a, P, ct, a, a, P, a, p, a. Write a balanced nuclear equation for each step. 

For the intepretation of the rheological results, using the elastic floe model, it is necessary to have a model for the flocculated structure. For the present case, flocculation probably takes place by interpenetration of PVA tails under worse than 9- conditions for the chain. A typical floe may be assumed to consist of strings of particles linked together in a more-or-less three-dimensional network. The compactness of the floe (as measured by Cpp) is related to its strength by the number of chains, n, which pass through unit cross sectional area of the floe (29,31). n can be calculated from the total number of bonds per floe (36), i.e. 

Second, the spatially periodic model suggests further interpretations and experiments. That no kink exists in the viscosity vs. concentration curve may be related to the fact that the average dissipation rate remains finite at the maximum kinematic concentration limit, ma>. Infinite strings of particles are formed at this limit. It may thus be said that although the geometry percolates, the resulting fields themselves do not, at least not within the context of the spatially periodic suspension model. 

The initial sintering stress is dependent upon only the dihedral an e. The application of stress on a string of particles will affect the chemical potential at the grain boundary and, more important, determine the sintering rate. The chemical potential of a surface atom is given by [9]... 

Flocculation of fine particles in gases or liquids plays an important role in industrial environmental control systems. Solid particulate contaminants are often so small that their removal from liquid or gaseous effluents is not economically possible. The agglomeration of these solids into sometimes rather loose larger floes , conglomerates, or strings of particles facilitates removal with conventional, economic environmental control devices. 

Extending these studies to ion-dipole mixtures in which a background dielectric constant is replaced by fluctuating solvent point dipoles, leads to practical nonergodic-ity due to the formation of clusters and/or strings of particles [164]. 

A similar device made use of a dispersion of semiconducting particles in an insulating fluid. Winslow in 1947 first patented such a fluid made by mixing fine silica particles in oil. This fluid flowed easily under ordinary conditions but gelled when a strong electric field, about 2 kV mm, was applied across it. Winslow showed by microscopic stndy that strings of particles were formed between the electrodes when the voltage was imposed. 

Fig. 5.26 SEM micrographs of several membrane surfaces reveal a range of pore structures that in turn result in a range of separation applications. An experimental, microporous, polyethylene membrane is shown (A) with elongated, stretched porous regions of various sizes, separated by fibrils, in the draw direction, and unstretched lamellae normal to the draw direction. This surface structure is quite different from three commercial membranes (B-D). One membrane (B) consists of a low density network of rounded pores, many of which are larger than 1 /im across. A nucleopore membrane (C) has more defined pore structure with rounded pores bored through from one side to the other. The morphology in (D) is an open network structure with the polymer in the form of strings of particles.

Physically, p —> 1 means that a string of particles has no probability of forming an arch and jamming at the hopper aperture, which implies that the aperture is longer than the string length. In this limit of p = 1, Equation 1.7 integrates to... 

---