Needle structure

Inteimediate purity. 50 to 55 percent alumina. The anorthite (needle-structure) form is more resistant to the action of steam exposure. 

Two types of structures were seen a needle type bundled structure pointing inward towards the center of the sphere and surface bumps. The needle type structures overall were less than 10 pm in length and less than 1 pm in thickness. To confirm that these structures corresponded to sodium alanate. elemental mapping of the alanate s sodium and aluminum constitutes was made. As can be seen in Fig.5, the presence of intense sodium distribution was noted on the needle structures while the both the surface bumps and needle structures showed the presence of aluminum distribution. These results confirmed spheres filling with the alanate. While these needle structures are not usual for sodium alanate. it is speculated that the porous silica could have provided a nucleation surface for these unique structures formation. Nevertheless, since the samples were exposed to ambient air prior to the... 

Lee and co-workers demonstarted that a micromachined parylene nozzle could serve as an electrospray emitter on a silicon chip. This hollow-needle structure extended more than a millimeter beyond the edge of the silicon substrate. MS/MS analysis of the mixture of peptides obtained from the trypsin digest of cytochrome c was demonstrated with this micromachined emitter, and... 

Adding La 11 Ag LaOgCOs CaC03 CaC03 Cubes — less defined, bigger Ag Round, smaller, needle structures 0.38 8.2 54.7 41.3... 

In the case of calcined kaoUn, individual kaolin plates are thermally fused into a clustered shape. With scalenohedral and aragonitic PCC, either a rosette or repetitive needle structure is formed through carefully controlled reactions of milk of lime and carbon dioxide. Amorphous silica products are chemically aggregated into repeating silica rings. 

Virjamo V, Sutinen S, Julkunen-Tiitto R. Combined effect of elevated UVB, elevated temperature and fertilization on growth, needle structure and phytochemistry of young Norway spruce (Picea abies) seedlings. Glob Chang Biol 2014 20... 

Fig. 8.7 (a) Fluorescence microscopy and (b) atomic force microscopy of the organic needle structures of Fig. 8.6. Image size 20 X 20 pm. Typical dimensicns are a break...

The morphology of the engineered calcium carbonate is shown in Figure 1 fi om which one can see it has a needle-like morphology. The average long axis of the needle structure was found to be l.OSum, whereas the short axis to be 0.25um. The fitted aspect ratio was found to be 5.42. Table 1 summarizes the particle size data for talc A and talc B. 

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