Spindle-like morphology

Figure 1.55. The relationships between the concentration product, (Ba " )i(S04 )i, at the initiation of barite precipitation, and morphologies of barite crystals (Shikazono, 1994). The dashed line represents the boundary between dendritic barite crystals and well-formed rhombohedral, rectangular, and polyhedral barite crystals. The 150°C data are from Shikazono (1994) the others from other investigations. D dendritic (spindle-like, rodlike, star-like, cross-like) barite Dp feather-like dendritic barite W well-formed rectangular, rhombohedral, and polyhedral barite. The boundary between the diffusion-controlled mechanism (Di) and the surface reaction mechanism (S) for barite precipitation at 25°C estimated by Nielsen (1958) The solubility product for barite in 1 molal NaCl solution at 150°C based on data by Helgeson (1969) and Blount (1977). A-B The solubility product for barite in 1 molal NaCl solution from 25 to 150°C based on data by Helgeson (1969).

Figure 9.4 Resveratrol induces morphological changes in cultured BPAEC. Panel A. Microscopic illustration of the stellar, cobblestone-like morphology characteristic of cultured normal BPAECs. Panel B. Illustration of elongated, spindle-shaped morphology characteristic of 100 pM resveratrol-treated cells. Cells are stained with rhodamine-phalloidin and viewed with a 20X objective. Note the long, tortuous projections.

The rod-like morphology of the nanofibrils supports the high yields, because a-chitin nanofibrils prepared by acid hydrolysis from TEMPO-mediated oxidation have a spindle-like shape and a larger distribution range of widths. 

Furthermore, R. K. Rana et al. reported a bio-inspired assembly of Ag/ AgCl/ZnO nanostructures with poly(allylaminehydrochloride) as the mineralizer for the enhaneed visible-light-driven photocatalytic activity. The as-prepared Ag/AgCl/ZnO had a spindle- and rod-like morphology along the (OOOl)direction with a width of 100-200 nm and a length of 400-700 nm (Fig. 26A). The Ag/AgCl particles were trapped in the porous... 

Beads need not be always spherical or spindle like collapsed shapes and prune-like beads (Shawon and Sung 2004) have been described. When a particularly volatile solvent such as THF is used to electrospin PS from 13 wt% solution, cup-shaped beads, likely resulting from the collapse of thin-walled spherical beads, were observed. Even more complex bead morphologies, such as porous cups with PMMA/acrylonitrile (8wt%) (Liu and Kumar 2005) or raisin-like morphologies with polycarbonate/(THF/CHCl3 1 1) (14-15 wt%) (Krishnappa et al. 2003), have been reported. Several complex shapes of beads encountered in electrospinning are illustrated in Fig. 3.8. 

The TN (molecular class basal-like) constitutes approximately 16% of all breast tumors. Morphologically, they show three dominant patterns sheetlike growth ( 50%), ductal NST (-40%), or apocrine carcinomas (-10%). These tumors may also show spindle... 

---