Cube blends

Cut a fresh, medium-sized potato (precooled for 24 hr at 1 to 5°C you need not peel the potato, but it should be washed to remove dirt and dust) into half-inch cubes. Blend 150 g of these cubes, added over a 30-sec period, with 150 ml of F120 for 2 min in a blender. Then quickly pour the resultant slurry onto a Buchner funnel lined with two to four layers of cheesecloth, and filter with vacuum, collecting the filtrate in the filter flask you prepared in step 2. Wash the crude pulp with 50 ml of H20 to ensure thorough enzyme extraction that is, add the water to the pulp, stir the mixture, and pass the mixture through the filter as before. Failure to complete these operations within 2 min of blending may result in loss of enzyme activity. Adjust the extract to a volume of 250 ml with... 

Cube blends, also called salt and pepper, employ a technique of blending concentrate and natural pellets prior to processing rather than metering concentrate in during processing. 

Cube blending—another type of batch process, where a batch of pellets (aka cubes) of one resin are mixed with a batch of pellets of one or more other resins. The blending usually occurs at room temperature, in a large container, that is then shaken and/or tumbled. The advantage of this process is that is simple, inexpensive, and does not subject the resin to a melt cycle. The disadvantage is that it can be difficult to ensure a consistent mix throughout the entire batch (Figure 3.20). 

Figure 3.20 Resin cubes of two different colors, about to be cube blended. XXLPhoto/Shutterstock.com.

PA also have a unique chemical structure that accommodates the use of dyes and colorants. Custom colors easily are achieved in the injection molding process through master-batch concentrates, cube blending, or custom compounding. 

Pigment used for dry blending is dried overnight at 150°C in a vacuum oven to remove absorbed gases and moisture. It is screened through a 149-p.m (100-mesh) screen directly onto the cubes, which are roUed or tumbled for at least 15 min. The pigmented resin is stored in an airtight container to prevent absorption of moisture. 

The predominantly ionic alkali metal sulfides M2S (Li, Na, K, Rb, Cs) adopt the antifluorite structure (p. 118) in which each S atom is surrounded by a cube of 8 M and each M by a tetrahedron of S. The alkaline earth sulfides MS (Mg, Ca, Sr, Ba) adopt the NaCl-type 6 6 structure (p. 242) as do many other monosulfides of rather less basic metals (M = Pb, Mn, La, Ce, Pr, Nd, Sm, Eu, Tb, Ho, Th, U, Pu). However, many metals in the later transition element groups show substantial trends to increasing covalency leading either to lower coordination numbers or to layer-lattice structures. Thus MS (Be, Zn, Cd, Hg) adopt the 4 4 zinc blende structure (p. 1210) and ZnS, CdS and MnS also crystallize in the 4 4 wurtzite modification (p. 1210). In both of these structures both M and S are tetrahedrally coordinated, whereas PtS, which also has 4 4... 

Figure 29.1 Crystal structures of ZnS. (a) Zinc blende, consisting of two, interpenetrating, cep lattices of Zn and S atoms displaced with respect to each other so that the atoms of each achieve 4-coordination (Zn-S = 235 pm) by occupying tetrahedral sites of the other lattice. The face-centred cube, characteristic of the cep lattice, can be seen — in this case composed of S atoms, but an extended diagram would reveal the same arrangement of Zn atoms. Note that if all the atoms of this structure were C, the structure would be that of diamond (p. 275). (b) Wurtzite. As with zinc blende, tetrahedral coordination of both Zn and S is achieved (Zn-S = 236 pm) but this time the interpenetrating lattices are hexagonal, rather than cubic, close-packed.

Combine all the ingredients, except the lime, in a blender and blend until you have a frozen liquid. Pour into a hurricane cocktail glass. (For a thicker drink, omit a few ice cubes.) Garnish the rim with a lime slice. 

Formulations for extrusion generally include light and heat stabilizers, lubricants, which facilitate molding, and colorants. These materials are generally purchased in a compounded ready to use cube form, in order to minimize irregularities in blending, etc. 

SPHALERITE BLENDE. Also known as zinc blende, this mineral is zinc sulfide, tZn, Fc)S, practically always containing some iron, crystallizing in the isometric system frequently as tetrahedrons, sometimes as cubes or dodecahedrons, but usually massive with easy cleavage, which is dodecahedral. It is a brittle mineral with a conchoidal fracture hardness, 2.5-4 specific gravity, 3.9-4.1 luster, adamantine to resinous, commonly the latter. It is usually some shade of yellow brown or brownish-black, less often red, green, whitish, or colorless streak, yellowish or brownish, sometimes white transparent to translucent. Certain varieties... 

Fig. 6.46 Calculated phase diagram cube for binary blends of symmetric diblocks (equal degrees of polymerization) with xN = 20 (Shi and Noolandi 1995). The diblock compositions are denoted /,/2 and the blend composition as cf>.

There are two modifications of Agl at ordinary temperatures, (3-AgI has the wurtzite (2 2PT) structure and y-Agl has the zinc blende (3 2PT) structure. For both of these structures Ag+ and I ions have CN 4 (tetrahedral). Above 145.8°C, a-Agl is formed with a bcc (3 2PTOT) structure for I ions. For a bcc structure all P, T, and O layers are filled by I ions for a-Agl. There are secondary interstitial sites for a bcc structure—four distorted tetrahedral sites (T ) in each face of the cube and distorted octahedral sites (O ) in the centers of the edges (12) and in the centers of the faces (6) of the cube. The T sites are shown as squares in each face of the bcc cube in Figure 7.28. The bcc cell... 

The ZnS zinc blende structure is cubic. The unit cell may be described as a face-centered sulfide ion sublattice with zinc ions in the centers of alternating minicubes made by partitioning the main cube into eight equal parts. 

Aluminum phosphide (A1P) exists as dark gray to dark yellow crystals with the cubic zinc blende structure.2 The length of an edge of the unit cube (a0) is 5.451 A. Aluminum phosphide does not melt or decompose thermally at temperatures up to 1000°. It is readily hydrolyzed to give phosphine. 

Most chemists represent their experimental conditions in mixture space, which corresponds to all possible allowed proportions of components that add up to 100%. A three component mixture can be represented by a triangle (Figure 2.31), which is a two-dimensional cross-section of a three-dimensional space, represented by a cube, showing the allowed region in which the proportions of the three components add up to 100 %. Points within this triangle or mixture space represent possible mixtures or blends ... 

Sphalerite (or zincblende ) has a lattice with zinc atoms at the corners and face centers of a unit cube and sulfur atoms at the centers of four out of the eight smaller cubes into which the large cube can be divided. Both zinc and sulfur are in regular tetrahedral coordination. The cleavage surface is the (110) surface, and this nonpolar face of ZnS (and other zinc-blende-structure binary compounds) is by far the best understood of all semiconductor surfaces (Kahn, 1983). 

In a large glass, mix 2 tablespoons of chocolate syrup and 1 tablespoon of cocoa powder until the cocoa is completely blended. Next add 4 ounces of cold nonfat milk and stir. Now add 4 ounces of cold club soda (sparkling water) followed by another 4 ounces of cold milk. Stir it gently to save the bubbles. Serve it with ice cubes or plain, and sip it through a straw for authenticity. 

In addition to the close packed structures, other more open structures exist. The most important of these are the body centred cubic and the diamond, or zinc blende, structures. In the former structure, eight spheres are arranged at the corners of a cube and a ninth sphere at the centre of... 

Blend guava, banana, flaxseeds, and soy milk until smooth squeeze half a lime for its juice, add Splenda, and ice cubes, and blend again until smooth. Pour into two tall glasses. Slit two lime slices and slide one onto the rim of each glass. Serve with a long spoon and straw. 

Adams and Baker used the methods previously described in Section III, D, 21 and Section IV, F to test four common types of blenders. They blended natural polythene granules with black granules which contained additives. The particles were cubes of -in. side, or cylinders or spheres about J-fj in. in diameter. 

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