INDEX interfacial area

In model equations, Uf denotes the linear velocity in the positive direction of z, z is the distance in flow direction with total length zr, C is concentration of fuel, s represents the void volume per unit volume of canister, and t is time. In addition to that, A, is the overall mass transfer coefficient, a, denotes the interfacial area for mass transfer ifom the fluid to the solid phase, ah denotes the interfacial area for heat transfer, p is density of each phase, Cp is heat capacity for a unit mass, hs is heat transfer coefficient, T is temperature, P is pressure, and AHi represents heat of adsorption. The subscript d refers bulk phase, s is solid phase of adsorbent, i is the component index. The superscript represents the equilibrium concentration. 

Functionality Analysis. Solubility was determined on 1% (w/v) dispersion of protein in 0.2 M phosphate buffers at a pH of 3.0 to 8.0. After stirring for 0.5 hr, the dispersion was filtered (0.45 /xm. Millipore), and the filtrate was analyzed for protein by the BCA method (21). Emulsifying activity index (EAI), expressed as interfacial area/unit weight protein (mVg) / was assessed by the turbidometric method of Pearce and Kinsella (22). 

Cameron, D.R., Weber, M.E., Idziak, E.S, Neufeld, R.J., and Cooper, D.G. 1991. Determination of interfacial areas in emulsions using turbidimetric and droplet size data Correction of the formula for emulsifying activity index. J. Agric. Food Chem. 39 655-659. 

Table 8.4 Calculated d spacings from measured and indexed Bragg peaks for hexagonal and cubic Si CjEOsi 6/D4 mixtures at 58°C, and derived micellar core radius Reore and interfacial area per molecule, as.

The interfacial area is A the thickness of the diffusion layer is 5 the index 0 refers to bulk concentrations. The volume of the bulk is equal to the total volume V of the reaction phase, minus the volume of the diffusion layer, which is A 5. The last equation can be rewritten to give the second boundary condition ... 

We can quantify the emulsifying power of a molecule using the Emulsifying Activity Index (EAI). If I add a certain volume of oil V (the dispersed phase) to water (the continuous phase) with an emulsifier, the radius of the oil droplets formed R can be related to the increase in interfacial area by the simple expression... 

There are surprisingly few studies of the retention mechanism for open tubular columns but the theory presented for packed columns should be equally applicable. For normal film thicknesses open tubular columns have a large surface area/volume ratio and the contribution of interfacial adsorption to retention should be significant for those solutes that exhibit adsorption tendencies. Interfacial adsorption has been shown to affect the reproducibility of retention for columns prepared with nonpolar phases of different film thicknesses [322-324]. The poor reproducibility of retention index values for columns prepared from polar phases was demonstrated to be c(ue to interfacial... 

In the diffusive interfacial transport-refractive index (DIT-NDX) method, compositions are determined using precise refractive index data (8). Refractive index data valid to +/- 0.00005 are obtainable using the DIT apparatus vithin an area of 30 ym2 in a sample approximately 25-ym thick (0.75 picoliter volume). Data collection and analysis require 9 seconds. The accuracy, spatial resolution, and speed vith vhich refractive indices can be determined are thus superb. 

O/W nanoemulsions with droplet radii in the range 26-66 nm could be obtained at surfactant concentrations between 4% and 8%. The nanoemulsion droplet size and polydispersity index was shown to decrease with increases in surfactant concentration this effect was considered due to the to the increase in surfactant interfadal area and the decrease in interfacial tension, y. 

After formation of this highly porous layer, the electrode is immersed into an acidic detachment solution, typically 25% sulfuric acid or phosphoric acid, which causes the rapid dissolution of the interfacial oxide. This process is faster in the areas indented by the smaller and smaller branched pores. Under such conditions, the aeid can readily access the Al electrode so that gas is evolved when the H2 bubbles coalesce, the process is completed. The Al electrode is then rinsed by immersion in water and dried in air. The porous alumina membrane is finally eollected by sliding an index card between the alumina layer and the Al electrode. The two faces of the detached alumina membrane are not equivalent the face that was detached from the Al electrode surface contains remnants of the interfacial oxide layer. However, these remnants can be... 

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