White dendrites

In most Al-containing alloys, the shape of the particles was tear-drop like due to the tight surface oxide film. The typical shape was shown in Fig.l. The effect of rapid solidification on microstructures is shown in Fig. 5 for AI2CU (precursor for Raney Cu) with a small amount of Pd (11). In the case of slowly solidified (conventional) precursor, most of the added Pd was solidified as a secondary Pd rich phase shown by white dendritic structure in Fig.5 (a). On the other hand, no such secondary phase was observed in a rapidly solidified precursor as shown in Fig.5 (b). 

We note the two constituents previously mentioned—the a constituent and the (a+y) eutectoid, which we will call E. The a constituent appears as white dendrites, while the eutectoid appears black. 

The white dendrites are a-Ph particles. As evident from Fig. 4.5a for the Ph—3.5 wt% Sh alloy, the a-Ph dendrites are several hundreds of micrometres in size and are oriented along the cooling direction. These particles are surrounded hy eutectic phase (dark grains). The crystallographic structure of the Ph—11.7 wt% Sh alloy (Fig. 4.5h) comprises mostly eutectic particles with only single a-Ph grains formed on cooling. These two phases (a-Ph and eutectic) have different mechanical properties and therefore the mechanical properties of the alloy will depend on its composition. 

The stone was a glassy knot containing white dendritic crystals, as shown in Figure 8(a). Petrographic analysis identified the stone through physical characteristics and the birefringence level as recrystaUized zirconia dendrites in a viscous sac, as shown in Figure 8(b). 

Min WP, Zhou D, Ichim TE, Strejan GH, Xia X, Yang J, Huang X, Garcia B, White D, Dutartre P, Jevnikar AM, Zhong R Inhibitory feedback loop between tolerogenic dendritic cells and regulatory T cells in transplant tolerance. J Immunol 2003 170 1304-1312. 

A marked increase in apolipoprotein D immunoreactivity is observed in hippocampus following neurotoxicity induced by KA (Table 6.3) (Ong et al., 1997). This increase in apolipoprotein D immunoreactivity occurs on the first day after KA injection, mainly in the cell bodies and dendrites of neurons (Fig. 6.3 A, 3B). Unlike the gray matter, no increase is observed in white matter tracts (Ong et al., 1997a). The significance of this upiegulation of apolipoprotein D remains unknown. However, apolipoprotein D binds to arachidonic acid (Morais Cabral et al., 1995), which is released by PLA2 stimulation. This could be a protective mechanism to limit the oxidative products from arachidonic acid, e.g. 4-HNE, after kainate injection. 

Figure 19.6 Micrographs of hippocampal neurons on FC membrane after (a) 4 hours, (b) 4 days (c) 16 days of culture. The arrows in a) indicate the emerging processes from the cell circumference the arrows in b) indicate the (black) axon and the dendrites (white).

Chalcedony Moss agate, mocha stone Any color, translucent to opaque, rarely transparent, several varieties may mix in any one specimen Clear to gray translucent white/black or green tree-like inclusions (dendrites) not a true agate, should be referred to as chalcedony with inclusions... 

Statistical analysis of dendritic trees. Brain Res 249 211 -221. Seldon HL. 2005. Does brain white matter growth expand the cortex like a balloon Hypothesis and consequences. Laterality 10(1) 81-95. 

A readily distinguished subtype, organized into the primary follicles of B-ceU zones focused around follicular dendritic cells in the white pulp of the spleen and the cortical areas of peripheral lymph nodes. 

Physical Properties of Pure Compact Iron.—The properties of iron are affected to such a remarkable and unique extent by the presence of small quantities of alloying elements, chief amongst which is carbon, that these phenomena are an important study in themselves. It is not intended in this section, therefore, to deal with the physical properties of any commercial iron other than the chemically pure and compact metal. For a discussion of the physical and metallurgical properties of various types of commercial iron and its alloys, the reader is referred to Part III. of this volume. Pure iron is a white metal which can be readily machined in a lathe, and even cut with a knife. It crystallises according to the cubic system,3 but crystals are rare, the metal being usually massive. Dendritic crystals may be obtained artificially with branches parallel to the cubic axes.4 Shock apparently assists or induces crystallisation in iron.5... 

HIV is an RNA retrovirus that infects CD4 lymphocytes, macrophages,and dendritic cells.Untreated HIV infection causes the progressive loss of CD4 T cells, the immune system white blood cells that protect against infection and malignancy. AIDS is diagnosed based on a low CD4 count, a high viral load, and the increased susceptibility to various infections or malignancies. 

Occasional development of Probable development of some adrenal adrenal suppression suppression Aggravation of a dendritic ulcer Discomfort with injection White residue possible Occasional white material, which is Epithelial keratopathy from cosmetically objectionable frequent applications Subconjunctival adhesions Occasional conjunctival infections Allergy to diluent Occasional orbital infection Occasional intraocular injection of steroid Ulceration of conjunctiva after repeated injections if not given behind the eye Exophthalmos and rugae in fundus Papilledema Adrenal suppression Occurrence of systemic side effects more likely... 

Where both y- and 6-dendrites are formed the y-dendrites appear white and the area occupied by the 6-dendrites dark at low magnification (figure 1.8 a). The reason forthis is that, on cooling and quenching, the 6-dendrites are partly transformed to y which contains closely spaced networks of residual 6, figure 1.8 b. 

Former 8-dendrites and y-dendrites. White in-terdendritic areas, (compare figure 11). 

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