NCEs

The entries in molecular mechanics parameter files are described in th e /lypcrChem iicfcre.nce Manual. Tfse th e folio won g proced ii re to modify an existing parameter set ... 

Dyna.micPerforma.nce, Most models do not attempt to separate the equiUbrium behavior from the mass-transfer behavior. Rather they treat adsorption as one dynamic process with an overall dynamic response of the adsorbent bed to the feed stream. Although numerical solutions can be attempted for the rigorous partial differential equations, simplifying assumptions are often made to yield more manageable calculating techniques. 

Fire Resista.nce. Many fillers, particularly inorganic oxides, are noncombustible and provide a measure of passive fire resistance to filled plastics by reducing the volume of combustible matter in the filled composition. Depending on their density, they may also serve as insulation. 

MoistureResista.nce, Plastic foams are advantageous compared to other thermal insulations in several appHcations where they are exposed to moisture pickup, particularly when subjected to a combination of thermal and moisture gradients. In some cases the foams are exposed to freeze—thaw cycles as well. The behavior of plastic foams has been studied under laboratory conditions simulating these use conditions as well as under the actual use conditions. 

Ca.pa.cita.nce, This property is dependent on the dimensions of the inner and outer conductors and the dielectric constant of the core. Most computer systems have a maximum allowable capacitance for interconnecting cables. For these systems, the lower the capacitance of the core material, the longer the cable that can be used. 

Ma.intena.nce. There are two types of maintenance work required (11). The first is regular preventative work, such as the periodic inspection and repair of a liner used to promote flow, protect the stmcture, or both. Loss of a liner may be unavoidable for an abrasive or corrosive product, yet... 

Fra.gra.nce. A key aesthetic for consumer acceptance of personal cleansing products is the product fragrance. Fragrance is utilized by... 

Wa.terBa.la.nce Chemicals. Water balance chemicals include muriatic acid, sodium bisulfate, and soda ash for pH control, sodium bicarbonate for alkalinity adjustment, and calcium chloride for hardness adjustment. A recent development is use of buffering agents for pH control. One of these products, sodium tetraborate, hydrolyzes to boric acid and a small amount of orthoborate (50) which provides significantly less buffering than carbonate and cyanurate alkalinity in the recommended pool pH range of 7.2—7.8 even at 100 ppm. 

Stea.m Ba.la.nces. The steam balance is usually the most important plant-wide energy balance. It shows each service requirement, including the use of steam as a working fluid to develop power. 

Use the Naphtali-Sandholm SC method to compute stage temperatures and interstage vapor and liquid flow rates and compositions for the rehoiled-stripper specifications shown in Fig. 13-53. The specified hottoms rate is equivalent to removing most of the nCs and nCe and some of the nC in the hottoms. 

Allyl cyanide, OHj. CH CEI. ON. The analytical values of a frac-tiori amounting tc a Few grama, which passed over botw ui 190° and 123°, and which also coolained sulphur (d, O fi- iTO saponification number 47 7) pointed to the prolialile presi.-nce oF allyl cyanide. 

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