Glass application

Glasses 7905, 7910, 7911, 7912, 7913, and 7917 foi special uv and k applications. Glass 1720 is available with improved uv transmittance (designated glass 9730). Glass 7760 is also available with special transmission suitable for sunlamps. 

Common law trademark right, 25 258 Common mode failures, 13 169 Communication. See also Communications organizational, 21 622, 628-629 in pilot-plant planning, 19 467-468 among process control levels, 20 676 Communication applications, glass fibers in, 12 612-616... 

Phosphates. Many phosphates claim unique material advantages over silicates that make them worth the higher material costs for certain applications. Glass-ceramics containing the calcium orthophosphate apatite, for example, have demonstrated good biocompatibility and, in some cases even bioactivity (the ability to bond with bone) (25). Recent combinations of fluorapatite with phlogopite mica provide bioactivity as well as machinability and show promise as surgical implants (26). 

The May Pack has been used world-wide to characterise radioiodine. In some applications, glass fibre-filters have replaced membrane filters and copper or silver gauzes have been used to trap elemental iodine. The separation of iodine species in the May Pack is at best qualitative. Some inorganic iodine vapour may be adsorbed on the particulate filter. Conversely, iodine adsorbed on particles, and trapped on the particulate filter, may be desorbed during extended periods of sampling. 

In most routine applications, glass electrode cells are calibrated by the two-point or bracketing procedure, using two secondary (or primary) standards with values that bracket the range in which the unknown lies. 

The modern use of glass has been somewhat reduced by the advent of plastics. Despite the durability and cost-effectiveness of plastic containers, plastic has not permeated all pharmaceutical applications. Glass is still the most attractive packaging material where chemical inertness, very low moisture and gas permeability, and heat resistance are concerned. Modern uses of glass are typically restricted to injectable liquids for parenteral use ° and other sterile preparations. ... 

Also used in industrial applications, glass and lens coating, cosmetics, penetrating oils, and personal-... 

Another glass cleaning variation that was launched as a product is a no-drip application. Glass cleaners, of their nature, have the viscosity and flow properties... 

Polysilicate. [DuPont] Polysilicate binder for refractory, ceramic, metal, inorg. fiber, catalyst support, inorg. paint systems, zinc coatings findustrial applic. glass surface modifier. 

In the majority of practical applications, glass electrodes cells are calibrated by a two-point calibration, or bracketing, procedure using two standard buffer solutions, with pH values, pH(Sj ) and pH(S2), bracketing the unknown pH(X). Bracketing is often taken to mean that the pH(Si) and pHfSj) buffers selected from Table 2 should be those that are immediately above and below pH(X). This may not be appropriate in all situations and choice of a wider range may be better. 

Many polymers in everyday use contain fillers and colouring agents that render them opaque. The optical properties of the base polymer are thus obscured. On the other hand the clarity of optical transmission of many polymers and the fact that they are almost colourless, coupled with their low density and excellent mechanical properties, are the reasons for their use to replace glass in many applications. In other applications glass would be totally inappropriate because of its greater brittleness. Other polymers, such as the ubiquitous polyethylene, are often colourless but translucent rather than transparent. 

---