Cores solid materials

Cables with multiple-layer sheathing have plastic-insulated cores. Solid PE or sintered PE is used as the plastic. Sintered PE is a foamed polyethylene material that has different electrical properties than solid PE. Under certain circumstances the core region is filled with a petrolatum material to give protection against... 

Two other types of peaks that can be observed in the XPS spectrum of solid materials are referred to as a shake-up and shake-off satellites. When a core-level electron is ejected from an atom by photoemission, the valence... 

It is interesting to generalise this solution for any core skin density ratio. Fig. 2.20 shows how the optimum skin thickness varies with D. This is independent of the solid material density or modulus but is based on a weight... 

The lithosphere is the solid portion of the earth. We shall use the term to include the central core, though there remains controversy as to whether the core is solid or liquid. The lithosphere is a sphere of solid material about 4000 miles in radius. We have direct access to only a minute fraction of this immense ball. The deepest mine penetrates only two or three miles. The deepest oil wells are about five miles deep. 

In the profiles of the core from the industrial area, mercury displays the highest accumulation. Mercury in this area, close to the industrial district, has probably derived from a large chloralkali plant which has employed mercury cathodes since the fifties. Whereas, at present, very severe measures are taken to prevent mercury spills into the Lagoon, in the past, polluted waters and solid materials were discharged almost untreated. In the most superficial strata a marked decrease in the accumulations is, in fact, recorded. Lead and Cd accumulations are lower here by a factor of 5-10. The presence of cadmium in the sediments of the Lagoon has been referred to sphalerite (ZnS) processing on the basis of a strict concomitant... 

Cores were collected from the NATA and adjacent wetland. Solid material was obtained from the aquifer beneath the NATA by filtering water samples from MW17. Pore water was squeezed from cores in a hydraulic press. Groundwater, surface and lake water samples were filtered (0.2 pm) in the field. Sub-samples were acidified to preserve cations. Arsenic species were separated on site by passing filtrate through SAX cartridges (Le et al. 2000). 

Shrinking-Core Model (SCM). Here we visualize that reaction occurs first at the outer skin of the particle. The zone of reaction then moves into the solid, leaving behind completely converted material and inert solid. We refer to these as ash. Thus, at any time there exists an unreacted core of material which shrinks in size during reaction, as shown in Fig. 25.3. 

Comparison of Models with Real Situations. In slicing and examining the cross section of partly reacted solid particles, we usually find unreacted solid material surrounded by a layer of ash. The boundary of this unreacted core may not... 

Another quite different area where ECP s have proven to be very useful for the development of transition metal cluster models. By using a very simplified description of the metal atoms, where all electrons including the d-electrons are considered as core, certain properties of the solid material such as chemisorption on metal surfaces or the reactivity of metal clusters has been studied theoretically with considerable success. 

Design of Layered Phosphonates Possessing Functionalities for Coordination to Multiply Bonded Bimetallic Cores. Solids shown in Figure 3c can be designed readily with LMPs because their galleries can be modified by pendant functionalities covalently anchored to the layers with the methods introduced by Alberti (25,55) and Dines (54-57). Reaction of organic phosphonic or arsonic acids with M4+ oxides, oxychlorides, and halides yields M(03XR)2 (X = P or As M = Ti, Zr, U, Th, and Ce) layered materials,... 

A lower level of organization in the supramolecular structure is evident even if the layered structure of the core and the stacking of the cyclohexane residues are retained. In this context, ordered H-bonded ionic triple-stranded helicates, involving (R,R)-frdicarboxylic acid, (R,R)-44, in D2O afforded the complex (R.R)-29 (R,R)-44 as large, colourless crystals suitable for X-ray analysis (Scheme 20). The same reaction performed in the presence of the mismatched (5,5)-tra -cyclohexane-l,2-dicarboxylic acid (45) did not give any solid material. A similar result was obtained with (S)-methylsuccinic acid. 

Encapsulation is a process in which tiny particles or droplets are covered by a coating [36-43]. Its role is either to isolate the active ingredient or to control the rate by which it leaves the capsule. As examples for the first case, one can mention the isolation of vitamins from oxygen or of a reactive core from chemical attack, and for the second case, the control of the rate of release of drugs or pesticides. Numerous encapsulation techniques have been suggested. Most of the encapsulations of the active solid materials have been carried out for solids larger than 1 pm. 

Solid material (%) (Volume of soil particles in core/total core volume) X 100... 

A tool used for extracting a vertical core of solid material, as when sampling from a barrel or bag. 

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