Axial growth

In the dise-type eouplings, the axial growth is limited by the dise defleetion range, so the equipment must be adjusted with more axial aeeuraey than with gear eouplings. 

Besides lateral (parallel) growth of MFI layers onto a porous metal support, also axial growth of MFI crystals onto (dense) metal supports is possible leading to interesting new composite catalysts. 

Pyrolysis of hydrocarbons (e.g. benzene, acetylene, naphthalene, ethylene, etc.) in the presence of catalysts (e.g. Co, Ni and Fe deposited on substrates such as silicon, graphite or silica) provides an additional route to fullerenes and carbon nanotubes. Prior to the discovery of fullerenes in 1985, pyrolytically grown nanofibres/nanotubes had actually been observed and structurally identified by several authors [74, 89-91]. Even at that early stage, a growth mechanism was postulated involving metal (catalyst) particles, which were held to be responsible for the agglomeration of carbon and subsequent axial growth of the fibre. 

The axial growth of the vitreous body is essentially completed by the age of 13 years. 

FIGURE 10 Variation of measured crystal axial growth rates with temperature over a period of 3 min following ice crystal nucle-ation. [Adapted from Ryan, B. F., Wishart, E. R., and Shaw, D. E. (1976). J. Atm. Sci. 33, 842-851. Courtesy of the American Meteorological Society and the lead author.]... 

FIGURE 12 Variation of calculated crystal axial growth rates with temperature over a period of --3 min following ice crystal nucleation. 

We provided, for the first time, experimental evidence for the involvement of cellular processes in the control of the axial growth of spicules. Using the primmorph system, we demonstrated that these cell processes originate from evaginations of the... 

Fig. 14.3 Stages of crystal pulling from the melt with variable free surface geometry, a) - Seeding, b), c), d) - Radial growth, e), f), g) - Axial growth.

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