Radio process

Thermo-oxidative degradation and radio-processing of ethylene vinyl acetate elastomers. Polymer Degradation and Stabiiity 82 (2003), p. 463-466... 

A unique process for chemical stabili2ation of a ceUular elastomer upon extmsion has been shown for ethylene—propylene mbber the expanded mbber obtained by extmsion is exposed to high energy radiation to cross-link or vulcani2e the mbber and give dimensional stabUity (9). EPDM is also made continuously through extmsion and a combination of hot air and microwaves or radio frequency waves which both activate the blow and accelerate the cure. 

Frequency Allocations. Under ideal conditions, an optimum frequency or frequency band should be selected for each appHcation of microwave power. Historically, however, development of the radio spectmm has been predominantly for communications and information processing purposes, eg, radar or radio location. Thus within each country and to some degree through international agreements, a complex Hst of frequency allocations and regulations on permitted radiated or conducted signals has been generated. Frequency allocations developed later on a much smaller scale for industrial, scientific, and medical (ISM) appHcations. 

Curing with Microwave or Radio-Frequency Processing Equipment... 

Plasmas can be used in CVD reactors to activate and partially decompose the precursor species and perhaps form new chemical species. This allows deposition at a temperature lower than thermal CVD. The process is called plasma-enhanced CVD (PECVD) (12). The plasmas are generated by direct-current, radio-frequency (r-f), or electron-cyclotron-resonance (ECR) techniques. Eigure 15 shows a parallel-plate CVD reactor that uses r-f power to generate the plasma. This type of PECVD reactor is in common use in the semiconductor industry to deposit siUcon nitride, Si N and glass (PSG) encapsulating layers a few micrometers-thick at deposition rates of 5—100 nm /min. 

Remote control units. These units are used to control unit processes. Basic control functions such as the PID algorithm are implemented here. Depending on other hardware components used, data acquisition capability may be required to perform digital control. They may be configured to supply process set points to single-loop controllers. Radio telemetiy may be installed to communicate with MUX units located at great distances. 

Cellulose Propionate H All conventional processes Toys, pens, aitomo-tive parts, radio cases, toothbrushes, handles... 

F P-F Most molding processes Jewelry, light fixtures, toys, radio cabinets, house-wares, lenses, insulators... 

The reaction of trifluoromethyl radicals, generated in a radio-frequency discharge process, with elemental mercury f/7i], mercury halides [174], dime-thylmercuiy [24], or HgO [175] has been used for the preparation of CFjHgX and (CF3)2Hg. Direct fluorination of dimethylmercury with elemental fluorine gives (CF3)2Hg [176],... 

The process by which heat is emitted from a body and transmitted across space as energy is called radiation. Heat radiation is a form of wave energy in space similar to radio and light waves. Radiation does not require any intermediate medium such as air for its transfer. It can readily take place across a vacuum. 

In many applications, especially where process plant is concerned, the measurement information is required to be conveyed to a central point, which may be a control room manned by operators or a computer which carries out the control functions automatically. The connecting link between the various measurement points and the central control is usually a telemetry system, although in some cases the distances involved are so large that radio links need to be used. 

Early studies on oxide films stripped from iron showed the presence of chromium after inhibition in chromate solutionand of crystals of ferric phosphate after inhibition in phosphate solutions. More recently, radio-tracer studies using labelled anions have provided more detailed information on the uptake of anions. These measurements of irreversible uptake have shown that some inhibitive anions, e.g. chromateand phosphate are taken up to a considerable extent on the oxide film. However, other equally effective inhibitive anions, e.g. benzoate" pertechnetate and azelate , are taken up to a comparatively small extent. Anions may be adsorbed on the oxide surface by interactions similar to those described above in connection with adsorption on oxide-free metal surfaces. On the oxide surface there is the additional possibility that the adsorbed anions may undergo a process of ion exchange whereby... 

A factor which previously limited installation of automatic corrosion monitoring systems was the cost of cabling between sensors and control room instrumentation-this was particularly relevant to the electrical resistance (ER) systems. Developments to overcome this have included transmitter units at the probe location providing the standard 4-20 mA output (allowing use of standard cable) for onward transmission to data systems or the use of radio linkage which has been successfully used for other process-plant instrumentation. 

In these processes, specialized equipment actually deposits a fine spray of molten metal on the plastic surface. The relatively thick, rough surface is generally used in non-appearance internal surfaces for electromagnetic and radio frequency shielding, as well as static electricity dissipation. 

The radioactive gas radon seeps out of the ground a product of radio. tiv< processes deep in the Earth. There is now some concern that its. iimnlation in buildings and its nuclear decay products can lead to dangerou, . h Vs I-, ot... 

Radio-Frequency (RF) sputtering, using frequencies above 50 kHz, can sputter insulators but the process has low deposition rates. 

We investigate here whether coherent detection of optical waves issued from celestrial sources can be processed in a way similar to radio astronomy (Fig. 1). 

GS21 Assessment of the radio frequency ignition hazard to process plants where flammable... 

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