Globular particle

A model which is attracting increasing attention, because of its relevance to actual solids composed of globular particles (Section 1.6), is the packed sphere model. By applying the same general principles as those outlined... 

In the AFM images of Figure 12.15, one can see many separated and randomly deposited globular particles on the mica surface. In each image, the particles appear to be substantially uniform in size, i.e. they are essentially monodisperse. This is not surprising if each bright spot represents a single dendrimer molecule. 

But for large globular particles, the angular dependence in the Berry plot... 

Various manufacturing processes are employed for the production of different gi of carbon black (Medalia and Rivin, 1976). The most important is the oil fur process, in which petroleum residue is subjected to partial combustion and crac in a refractory furnace. Colloidal carbon is produced in the form of a hot smo] small globular particles, which on cooling undergo aggregation to give bran chain-like structures. 

Globular particles of relatively large size ( 200 nm) and low specific surface ( 10 m2 g"1) can be produced by the thermal process, which involves the the cracking of natural gas. The thermal blacks (e.g. Sterling FT) have lower ash co than the furnace blacks for this reason, and because of the discrete nature of primary particles, they are favoured for adsorption studies. 

Malleable cast iron, which is tougher and less brittle than either white or ordinary gray cast iron, is made by heat treatment of gray cast iron of suitable composition Under this treatment the flakes of graphite coalesce into globular particles, which, because of their small cross-sectional area, weaken the ferrite less than do the flakes (Fig, 26-5). 

TEM showed that V-MCM-41 particles have a highly ordered porous structure with some typical hexagonal crystals [38,93,173,176]. However, as other HMS materials, V-HMS consisted of globular particles of 0.1 to 0.4 pm in diameter with disordered channel packing [173,175]. Diffuse reflectance UV-visible spectra of V-HMS exhibited two bands in the range of 373-385 nm and 252-272 nm. Similar bands were observed at 384 and 265 nm for V-... 

A/An is a globular particle, containing lipids and proteins, that... 

The peroxidase activity of immobilized catalase on the oxidation of phenol has been studied. The immt ilization was carried out from catalase solutions with pH < 3,5 on two kinds of soot differing in the average size of the particles building them up. The effect of the initial concentration of ph iol on the rate of its peroxidase oxidation by catalase immobilized on the soot of finer-graWd structure has been studied. The relationships obtained are described by the equation of Michaelis-Menten. The kinetic parameters (the constant of Michaelis - Km. the maximum reaction rate - V, the rate constant - k and the activation energy - of the process were calculated. It was found that catalase adsorbed on the soot of larger globular particles does not take part in the peroxidase oxidation of phenol. 

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