Root cast

Vadose cementation is intimately associated with rhizocretions, which record the orientation and position of former root systems as root casts or moulds (Klappa, 1980b Esteban Klappa, 1983 Goudie, 1983 Retallack, 1988, 1990 Wright Tucker, 1991 Gardner etal., 1992 Milnes, 1992). 

Cohen, A.S. (1982) Paleoenvironments of root casts from the Koobi Fora Formation, Kenya. J. sediment. Petrol., 52, 401-414. 

The bottom edge of the fencing material should be rooted into a continuous-cast concrete sill set into the ground to prevent the material being bent up and burrowing ... 

The gel layer thickness increases linearly with the square root of dipping time indicating that indeed a slip-casting process is operative. The rate constant depends on gel structure and pore size of the support. If the modal pore size of the support is increased from 0.12 /im (type 1 support) to 0.34 /xm (type 2 support) the casting rate is decreased in accordance with theory. Typical casting rates for type 1 and type 2 supports are 4.4 /xm/s and 2.8 /xm/s, respectively for HNO3-stabilized sols with a concentration of 1.22 mol boehmite/L. 

The conditions (12.5) have been stumbled upon from time to time and then dismissed as unphysical n cannot be 0 But the reader who has faithfully waded through Chapters 9 and 10 should by now be somewhat hardened to refractive indices less than 1—or even 0. Indeed, one of our objectives in Chapter 9 was to clear the way for the introduction of (12.5), knowing full well that it is often unpalatable. Prejudices about what the dielectric function can or cannot be are not nearly so deeply rooted as those surrounding the refractive index thus, (12.3) can be cast in a more palatable form in terms of the complex dielectric function of the particle c = t + it" ... 

The brain can no longer be seen as a vast piece of organic clockwork, but as a subtle device amplifying quantum events. If we trace a nerve impulse down to its root, there lies a quantum uncertainty, a sea of probability. So just how is it that this sea of probability can cast up such ordered structures and systems as the conception of a cello concerto or abstract mathematical entities Perhaps here we may glimpse a way in which "spirit" can return into our... 

Fig. 20.4. An example of motor neuron loss reflected in ventral root axon number. The L4 ventral root stained for myelin is shown in cross-section in (A) a control mouse, (B) an nmd mouse (Ighmbp2 mutant), (C) an nmd mouse carrying a modifier locus from CAST, and (D) an nmd mouse with transgenic rescue of the Ighmbp2 gene driven in the nervous system. For details, see (39).

The fact is, the physical chemists never use their eyes and are most lamentably lacking in chemical culture. It is essential to cast out from our midst, root and branch, this physical element and return to our laboratories. 

Films cast from the root SCMKA gave an a-diagram when examined by X-ray diffraction (MacRae and Rogers, unpublished observations,... 

Driese S. G., Mora C. L, and Elick J. M. (1997) Morphology and taphonomy of root and stump casts of the earhest trees (Middle and Late Devonian), Pennsylvania and New York, USA. Palaios 12, 524-537. 

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