Development approaches

To comply with existing and future legislation with respect to silver content in processor rinsing water, the approach developed by Agfa is threefold. [Pg.609]

An approach developed by Guggenheim [106] avoids the somewhat artificial concept of the Gibbs dividing surface by treating the surface region as a bulk phase whose upper and lower limits lie somewhere in the bulk phases not far from the interface. [Pg.76]

A more elaborate theoretical approach develops the concept of surface molecular orbitals and proceeds to evaluate various overlap integrals [119]. Calculations for hydrogen on Pt( 111) planes were consistent with flash desorption and LEED data. In general, the greatly increased availability of LEED structures for chemisorbed films has allowed correspondingly detailed theoretical interpretations, as, for example, of the commonly observed (C2 x 2) structure [120] (note also Ref. 121). [Pg.704]

The fomialism outlined in the previous sections is very usefiil for small systems, but is, as explained, impractical for more than six to ten strongly interacting degrees of freedom. Thus, alternate approaches are required to represent dynamics for large systems. Currently, there are many new approaches developed and tested for this purpose, and these approaches are broadly classified as follows ... [Pg.2311]

The approach developed by Jungen and Merer (JM) [24] is of a similar level of sophistication. The main difference is that IM prefer to remove the coupling between the electronic states by a transformation of the Hamiltonian matrix (i.e., vibronic energy matrix), rather that of the Hamiltonian itself. They first calculate the large amplitude bending functions for one of the adiabatic potentials, as if it belonged to a E electronic state. These functions are used as... [Pg.511]

A newer approach developed for producing commercial quantities of high purity AP (8,36) involves the electrolytic conversion of chloric acid [7790-93 ] to perchloric acid, which is neutralized by using ammonia gas ... [Pg.66]

The approach developed will be used for working up of a new generation of the corresponding standai ds. The same approach may be also adapted for analysis of some other products of gas industry, such as liquefied gases, natural gas, etc. [Pg.183]

We direct attention to procedures for estimating the air quality impact of stationary sources based on an approach developed by the US EPA. [Pg.297]

A fruitful approach for velocity computation in the first three zones of jets supplied from outlets with finite size was developed based on the hypothesis that momentum diffuses with distance from the source in the same manner as heat energy." 40 approach, developed by Elrod,Shepelev and Gelman, - and Regenscheit, utilizes the method of superposition of jet momentum from the multiple-jet system. These jets originate from the points with supply air veloc-... [Pg.453]

The second approach, developed by Woodward and co-workers and repeatedly applied by others, involves the condensation... [Pg.111]

After we obtained the self-consistent electronic structure of the magnetic multilayers we calculated the non-local conductivity by evaluating the quantum mechanical linear response of the current to the electric field using an approach developed by Kubo and Greenwood. In this approach the conductivity is obtained from a configurational average of two one-electron Green functions ... [Pg.274]

Although important contributions in the use of electrical measurements in testing have been made by numerous workers it is appropriate here to refer to the work of Stern and his co-workerswho have developed the important concept of linear polarisation, which led to a rapid electrochemical method for determining corrosion rates, both in the laboratory and in plant. Pourbaix and his co-workers on the basis of a purely thermodynamic approach to corrosion constructed potential-pH diagrams for the majority of metal-HjO systems, and by means of a combined thermodynamic and kinetic approach developed a method of predicting the conditions under which a metal will (a) corrode uniformly, (b) pit, (c) passivate or (d) remain immune. Laboratory tests for crevice corrosion and pitting, in which electrochemical measurements are used, are discussed later. [Pg.1004]

As in the [22]porphyrin(3.1.3.1) series, the cyclohexene moieties being part of the bridges originate from the preparation of the dimers from dimethylpyrrole and a hydronaphthalene diketone by acid-catalyzed condensation. The synthetic approach developed by Franck2b has the advantage over the foregoing method that more stable conventional pyrroles and dipyrryl-methanes can be used to form the macrotetracycle in a stepwise manner. [Pg.696]

The FEP and PDLD approaches developed in the previous chapters can be used conveniently to calculate the effect of genetic mutations. For example, one can calculate the reaction profile for the native and mutant... [Pg.184]

The first approach developed by Hsu (1962) is widely used to determine ONE in conventional size channels and in micro-channels (Sato and Matsumura 1964 Davis and Anderson 1966 Celata et al. 1997 Qu and Mudawar 2002 Ghiaasiaan and Chedester 2002 Li and Cheng 2004 Liu et al. 2005). These models consider the behavior of a single bubble by solving the one-dimensional heat conduction equation with constant wall temperature as a boundary condition. The temperature distribution inside the surrounding liquid is the same as in the undisturbed near-wall flow, and the temperature of the embryo tip corresponds to the saturation temperature in the bubble 7s,b- The vapor temperature in the bubble can be determined from the Young-Laplace equation and the Clausius-Clapeyron equation (assuming a spherical bubble) ... [Pg.260]

The complexity of steam-liquid flow in a micro-channel is the result of interactions between liquid inertia, the liquid viscous force, and surface tension. The approach developed by Lee and Mudawar (2005a) may be used to calculate the pressure drop in micro-channels. Two key measures of these interactions are the Reynolds and Weber numbers based on liquid properties. [Pg.318]

These equations, supplemented by the expression for the liquid density and vapor pressure, may be integrated into the general case only numerically. However, for some important particular cases, reasonable approximations can be introduced which simplify the system of equations for the average parameters to a form that can be integrated analytically. This approach, developed below, yields expressions for a set of first-order integral equations of the average parameters. [Pg.358]

The quasi-one-dimensional model of flow in a heated micro-channel makes it possible to describe the fundamental features of two-phase capillary flow due to the heating and evaporation of the liquid. The approach developed allows one to estimate the effects of capillary, inertia, frictional and gravity forces on the shape of the interface surface, as well as the on velocity and temperature distributions. The results of the numerical solution of the system of one-dimensional mass, momentum, and energy conservation equations, and a detailed analysis of the hydrodynamic and thermal characteristic of the flow in heated capillary with evaporative interface surface have been carried out. [Pg.374]

A variation of an approach developed by Meyers was used to prepare nifedipine-type 1,4-dihydropyridines 35 from pyridine 34 using an oxazoline-directed aryllithium 1,4-addition reaction <96H(43)2425>. [Pg.228]

To explain the effect of the GP on the nuclear dynamics [i.e., to explain the difference between the dynamics described by an encircling T g(< )) and an encircling T n(< ))], we need to compare the topology of T g(< )) with the topology of T n(< ))- In Section II. C, we review how this can be done using the homotopy of the Feynman paths [41-45] that make up these wave functions. But first, to demonstrate the simplicity of the problem, we use the diagrammatic approach developed in Refs. [27 and 28]. [Pg.6]

In particular, for copolymers this required an orthogonal coupling of one GPC to another to achieve the desired cro fractionation before application of dual detectors. This method is really a new polymer analysis member of a family of approaches developed in the literature which we are now terming "Orthogonal Chromatogr hy . It not only provides both a cro fractionation approach for copolymers and a new way of determining the GPC s "imperfect resolution" it also enables separation mechanisms previously reserved for the liquid chromatography of small molecules to be used for polymer analysis. [Pg.149]

In any event, we are confident that the computational approach developed in this study, owing to its efficient use of molecular symmetry, can help develop large basis sets for first and second hyperpolarizabilities. An important aim would be that of estimating, at least at empirical level, Hartree-Fock limits for these quantities. To this end the use of basis sets polarized two times, according to the recipe developed by Sadlej [37], would seem very promising. [Pg.293]

Based on the limited success of this approach and the more promising results from the benzoxathiin reduction approach, development of this route was put into lower priority. [Pg.150]

An alternative to repeated cloning of PCR products is a recombination-based approach developed by Liu et al. (1998) to permit the cloning of a PCR product into a plasmid and the rapid conversion of the plasmid to a number of different expression systems without the necessity of cloning the PCR product multiple, independent times. The method, termed the univector plasmid-fusion system (UPS), involves the insertion of the PCR product into a particular type of plasmid, called the univector, which can then be placed under the control of a variety of promoters or fused in-frame to various tag sequences. The system is based upon plasmid fusion using the Cre-lox site-specific recombination system of bacteriophage PI (Sternberg et al., 1981). The Cre enzyme is a site-specific recombinase that catalyzes recombination between two 34 base pair (bp) loxP sequences and is involved in the resolution of dimers formed during replication of the... [Pg.37]

For a limited number of exposure pathways (primarily inhalation of air in the vicinity of sources), pollutant fate and distribution models have been adapted to estimate population exposure. Examples of such models include the SAI and SRI methodologies developed for EPA s Office of Air Quality Planning and Standards (1,2), the NAAQS Exposure Model (3), and the GEMS approach developed for EPA s Office of Toxic Substances (4). In most cases, however, fate model output will serve as an independent input to an exposure estimate. [Pg.295]

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