Aggregate of nodules

On the other hand, fine-grained CAIs consist of aggregates of nodules with a concentric structure consisting of spinel cores surrounded by melilite, anorthite, and diopside, or melilite cores surrounded by anorthite and diopside (Fig. 7.5). The sequence of minerals in the nodules is consistent with a condensation sequence. However, the textures of the overall objects are complicated and often indicate extended and multistage histories. For... 

The "tubones" existing at the top -three in number-, are composed of an aggregate of nodules with reniform morphology, suiTounded by a thin layer, more or less abundant, of dark-gray dolomitic marls. At times this layer is weak and remember the chicken-wire structure. 

The atomic force microscope work has shown the size of the aggregates of nodule aggregates (ANA s) vary with the spinning conditions and also... 

Liver Nodule A small node, or aggregation of cells within the liver. 

Backscattered electron image of a portion of a fine-grained Type A CAI in the Efremovka CV3 chondrite. This inclusion consists of nodules of spinel (sp) surrounded by anorthite (an) and thin rims of pyroxene (px). This CAI may be an aggregate of condensates. 

Statement 1. Bituminous sand is an aggregate of sand, clayey matter, oil and water. The sand consists mainly of quartz particles of 50 to 200-mesh size and smaller, but also of particles of other minerals including mica, rutile, ilmenite, tourmaline, zircon, spinel, garnet, pyrite, and lignite. Clay occurs interbedded with the bituminous sand itself. Ironstone nodules of all sizes up to eight inches in diameter occur in the bituminous sand beds, especially in the southern part of the deposit. The oil is viscous, naphthenic, and of a specific... 

One might expect the nodule diameter of pure LDPE to be the same as that in the amorphous rubber/LDPE blend. This could result if the same proportion of LDPE nucleated the crystals and if no amorphous EPDM lay inside the LDPE crystallites. However, the concentration of crystallites would be lower in the blend. It is impossible for us to measure the concentration of crystallites in this blend. The resolution is inadequate and the etching depth is not accurately known. We will have to look at blends containing less LDPE to see if the crystallite concentration decreases. No spherulites are seen in these blends by polarized optical microscopy. However, these nodules are too small for optical resolution, and may indeed be spherulites or aggregates of lamellae. 

The most readily observed structure of PPy samples is the peculiar surface morphology common to all electropolymerized PPy films and coatings. The morphology consists of nodules ranging in size to hundreds of microns and that themselves consist of aggregations of smaller particles. The structure has been referred to as a cauliflower - or fractal -like surface. 

Important membrane surface properties include the size of nodules and nodule aggregates, the shape of pores, the pore size and pore size distribution, and the surface roughness. In this chapter, the focus will be on nodules and nodular aggregates since AFM seems most suitable for those. Moreover, there is evidence that nodular structure has some relationship to membrane performance. 

Nodular aggregates—spherical clumps of nodules, from 400 to 1000 A in diameter... 

The diameter of the nodules appears to be 20 and 16 nm for S and M membranes, respectively. For the H membrane, supernodular aggregates of 620 nm contained 6-8 nodule aggregates of 140 nm (Fig. 4.27). In addition to their small diameter (12 nm), the Si02 nodules are more discernable than those of M and S membranes. 

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