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Potential formula

Results obtained from Eq.(22) and numerical solution of the RDM equation with the instantaneous dissipation from the dissipative potential formula, are in very good agreement with our previous results [29] using propagation of density amplitudes. The adsorbate state populations P/ reach at long times constant values, with Pg(oo) + Pe(oo) = 1 — Ps(oo) and Ps equal to the total population of the substrate, maintained by a steady interaction between p-and s-regions. [Pg.377]

In depth knowledge of potential formula components at functional, physical and chemical levels. [Pg.36]

It is natural that Pt " cation is easier to be reduced than Ru " one according to their standard reduction potentials (formulas (6) and (7)). [Pg.672]

Using the two-potential formula [Ro 67] the Watson quasi-two-body t-matrix can be written as... [Pg.239]

Recently Elster, Liu and Thaler (ELT) [El 91] proposed a novel method for dealing with the momentum space Coulomb problem, which is, in principle, exact and may be less prone to numerical difficulties than the VP method. Their approach is based on the separation of the optical potential in eq. (3.63) and employs the two-potential formula [Ro 67] to express the full scattering amplitude as a sum of the point Coulomb amplitude and the point Coulomb distorted nuclear amplitude. The latter is obtained by numerically solving an integral equation represented in terms of Coulomb wave function basis states rather than the usual plane wave states. [Pg.259]

The convergence factor method is cumbersome and work is in progress to include the EMSO potential by way of the two-potential formula [Ro67] and the distorted wave Bom approximation (DWBA). [Pg.260]

Bruggeman s formula (v = l), Bottcher s formula and Polder-van Santen formula y = 2) and coherent potential formula (1/ = 3). ... [Pg.198]

It is not easy to find a formula to evaluate the friction coefficient under mixed lubrication conditions. As reported in many studies (see for instance [24]), complex phenomena related to the asperity contacts and to the chemical-physical characteristics of lubricant and materials are not easy to combine in a single expression. For instance, to include boundary lubrication effects, roughness should be present in each potential formula, but it cannot easily be introduced by using only one parameter such as Rq the above mentioned wear phenomena introduce additional variables. [Pg.831]

Once the production potential of the producing wells is insufficient to maintain the plateau rate, the decline periodbegins. For an individual well in depletion drive, this commences as soon as production starts, and a plateau for the field can only be maintained by drilling more wells. Well performance during the decline period can be estimated by decline curve analysis which assumes that the decline can be described by a mathematical formula. Examples of this would be to assume an exponential decline with 10% decline per annum, or a straight line relationship between the cumulative oil production and the logarithm of the water cut. These assumptions become more robust when based on a fit to measured production data. [Pg.209]

The main point of our elaboration is, that the Gibbs measure (4) of the potential lattice under interest ctin be considered as a nontrivial prior in the Bayes formula for the conditional probability, applied to the problem of image restoration ... [Pg.114]

By analogy with the Helmholtz condenser formula, for small potentials the diffuse double layer can be likened to an electrical condenser of plate distance /k. For larger yo values, however, a increases more than linearly with o, and the capacity of the double layer also begins to increase. [Pg.173]

IHP) (the Helmholtz condenser formula is used in connection with it), located at the surface of the layer of Stem adsorbed ions, and an outer Helmholtz plane (OHP), located on the plane of centers of the next layer of ions marking the beginning of the diffuse layer. These planes, marked IHP and OHP in Fig. V-3 are merely planes of average electrical property the actual local potentials, if they could be measured, must vary wildly between locations where there is an adsorbed ion and places where only water resides on the surface. For liquid surfaces, discussed in Section V-7C, the interface will not be smooth due to thermal waves (Section IV-3). Sweeney and co-workers applied gradient theory (see Chapter III) to model the electric double layer and interfacial tension of a hydrocarbon-aqueous electrolyte interface [27]. [Pg.179]

The final and less commonly dealt-with member of the family of electrokinetic phenomena is the sedimentation potential. If charged particles are caused to move relative to the medium as a result, say, of a gravitational or centrifugal field, there again will be an induced potential E. The formula relating to f and other parameters is [72, 77]... [Pg.188]

In the classical region of space, where the potential is less than the energy, the standard formula leads to an approximate relation between phase and modulus in the form of the following path integral ([237], Section 28)... [Pg.114]

It also has potential use in ceramic and glass formulas, as the oxide has a high melting point and imparts shock resistance and low expansion characteristics to glass. [Pg.74]

Most potential energy surfaces are extremely complex. Fiber and Karplus analyzed a 300 psec molecular dynamics trajectory of the protein myoglobin. They estimate that 2000 thermally accessible minima exist near the native protein structure. The total number of conformations is even larger. Dill derived a formula to calculate the upper bound of thermally accessible conformations in a protein. Using this formula, a protein of 150 residues (the approx-... [Pg.14]

It is estimated that mote than 25 x 10 different potentially toxic OP esters can be made using Schrader s classic (27) formula for effective phosphorylating agents, (39), where R and are short-chain alkyl, alkoxy, alkylthio, or alkylamino groups, and X is a displaceable moiety with a high energy P-bond such as E or acyl anhydride, and the pentavalent phosphoms atom is bonded to oxygen or sulfur. [Pg.279]

Catalyst Effectiveness. Even at steady-state, isothermal conditions, consideration must be given to the possible loss in catalyst activity resulting from gradients. The loss is usually calculated based on the effectiveness factor, which is the diffusion-limited reaction rate within catalyst pores divided by the reaction rate at catalyst surface conditions (50). The effectiveness factor E, in turn, is related to the Thiele modulus,

first-order rate constant, a the internal surface area, and the effective diffusivity. It is desirable for E to be as close as possible to its maximum value of unity. Various formulas have been developed for E, which are particularly usehil for analyzing reactors that are potentially subject to thermal instabilities, such as hot spots and temperature mnaways (1,48,51). [Pg.516]


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See also in sourсe #XX -- [ Pg.257 ]




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