Surface area/weight

Esophagus Ensure transit Adjust tablet shape Surface area/weight ratio... 

It is necessary that the anodes supply current demands consistently during the life of the system. It is necessary to bear in mind that the current output of the anode varies with the shape of the anode because of the difference in surface area/weight ratio. The anode output I depends on the anode shape, resistivity of the environment, the protection potential Ep and the anode operating potential E., and may be written as ... 

The second set of descriptors describes hydrophobic surface properties of a molecule. As with the first set, the second set contains similar partial hydrophobic and partial hydrophilic surface area descriptors (PPHS-%and PNHS-%, respectively), differences in partial surface area descriptors (FPHS-% and FNHS-%), as well as total surface area weighted descriptors (WPHS-x and WNHS-%). In addition, two descriptors assessing the most hydrophobic atom and the most hydrophilic atom on the overall lipophilicity are also described (RPH and RNH). The atom-based fractional log P contributions used for calculations are those of Wildman and Crippen [37] and... 

The extent of degradation is related to the sample surface area, which is related to particle size. Therefore, it is important that the sample of active ingredient used is representative of that to be used for making the clinical product. Because photodegradation only occurs on the surface of solid samples, the surface area/weight ratio of the material exposed will affect the extent of observed degradation. 

This finding is consistent with the rule of thumb of electrokinetics that the isoelectric point of a mixed surface is the surface-area-weighted average of the isoelectric point values of the components (15). Hence it appears that this surface concentration regime corresponds to the completion of silica monolayer surface coverage of titania particles. This... 

The fin efficiency for flat fins (Fig. 17.14b) is obtained by a sector method [15]. In this method, the rectangular or hexagonal fin around the tube (Fig. 17.28a and b) or its smallest symmetrical section is divided into N sectors. Each sector is then considered as a circular fin with the radius reJ equal to the length of the centerline of the sector. The fin efficiency of each sector is subsequently computed using the circular fin formula of Table 17.7. The fin efficiency T /for the whole fin is then the surface area weighted average of x f, of each sector. 

The particles of carbon black are not discrete but are fused clusters of individual particles. The reinforcement conferred by the black is not influenced to any extent by the size of the unit but predominantly by the size of the particles within the unit. The primary particle typically has cross-sectional dimensions" of 5-100 nm. It is well established that the most appropriate way of describing the size of the primary particles is to express it as speciflc surface area/weight Particle size of itself has relatively little effect on the modulus. But tensile and tear strengths are affected by the particle size and both properties are normally enhanced as the surface area increases (i.e. surface area increases with decreasing particle size). The high surface area enhances the ability of the filler to wet the rubber and thus enhances the interaction at the rubber filler interface. It is the enhancement of the filler-rubber interface that provides the desired reinforcement in filled vulcanized rubber. 

The surface area/weight ratio of the ceramic particles should not exceed 10 m /g, as smaller particles tend to adversely affect the sintering characteristics of the accompanying inorganic binder. Ceramic particles having a surface area-to-weight ratio of 1-5 m /g are generally considered optimum. 

Some variations of the basic coupon specimens can provide rapid material corrosivity evaluations. The helical coil adopted in the ISO 9226 methodology is a high surface area/weight ratio coupon that gives a higher sensitivity than panel coupons of the same material. The use of bimetallic specimens in which a helical A91100 aluminum wire is wrapped around a coarsely threaded bolt may provide additional sensitivity and forms the basis of the Classify Industrial and Marine Atmospheres (CLIMAT) coupon [11 18]. 

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