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Model two-site

Fig. 2. Two-site models of the sonochemical reactioas sites, (a) Thermal diffusioa sheU model (b) surface wave droplet model. Fig. 2. Two-site models of the sonochemical reactioas sites, (a) Thermal diffusioa sheU model (b) surface wave droplet model.
A. Two site model with two equivalent non-interacting binding sites. Kb = 1.2 M 1, koff = 6.6x10 7 sec, kcb = 1.3 x 107/sec. This model is incorrect because a tight and a weak site have been observed with different off-rate constants as listed in part B. [Pg.193]

NOTE Data were computer-analyzed with a two-site model (Munson and Rodbard 1980). Kh... [Pg.245]

Jensen EV, Khan SA (2004) A two-site model for antiestrogen action. Mech Age Develop 125 679-682... [Pg.166]

Figure 4.7, Intensity Cb quenching data for (a) Ru(bpy)3I+, (b) Ru(phcn)32+ (phen = 1.1 Ophenanthroline), and (c) Ru(Ph2phen>32+ in GE RTV 118 silicone rubber. The solid lines are the best fits using the two-site model. (Reprinted from Ref. 26 with permission. Copyright 1987 American Chemical Society,)... Figure 4.7, Intensity Cb quenching data for (a) Ru(bpy)3I+, (b) Ru(phcn)32+ (phen = 1.1 Ophenanthroline), and (c) Ru(Ph2phen>32+ in GE RTV 118 silicone rubber. The solid lines are the best fits using the two-site model. (Reprinted from Ref. 26 with permission. Copyright 1987 American Chemical Society,)...
The noise-free Stern-Volmer lifetime plots are clearly curved, which indicates a failure of a two discrete site model. However, this is a difficult nonlinear least-squares fitting problem, and the unquenched apparent lifetimes are within a factor of two of each other. Thus, for real data, it is much more difficult to pick up on the nonlinearities and exclude a discrete two-site model. For distributions with smaller R s, of course, fitting becomes too difficult for reliable model testing at least at 104 counts in the peak channel. [Pg.98]

The two-site model of Eq. (4.11) also works well for fitting the quenching data of a large number of ReL(C0)3NCR+ complexes with different a-diimines and alkyl groups embedded in a silicone rubber/62 Further, it provides considerable insight into the nature of the binding sites as a function of the structure and size of the a-diimine. [Pg.101]

Even though the two-site model has shortcomings, it is excellent for fitting intensity quenching curves. Thus, it has excellent predictive and calibration properties, has a chemically sound basis, and (at least for inorganic complex sensors) is preferable to the less accurate power law calibration equation. [Pg.101]

An advantage of the inability to detect single Gaussian distributions by intensity data is that intensity quenching data (even complex distribution functions of two sites) can be reliably modeled using a discrete two-site model. This has obvious practical implications in sensor design and calibration. [Pg.104]

The partition function and the binding isotherm of a general two-site model were discussed in Section 4.2. Here, we examine a special case of direct correlation only. The model is essentially the same as in the previous section, except that now... [Pg.77]

More sophisticated experimental and theoretical analysis of isoselective polymerizations have been performed by using a two-site model for propagation [Inoue et al., 1984 Wu et al., 1990]. The polymer product is fractionated into the highly isotactic, insoluble and atactic,... [Pg.712]

Strong evidence of ionic association was found by Stilbs and Lindman 69) in their PGSE study of aqueous polyelectrolyte solutions, polyacrylic acid and poly-methacrylic acid, neutralized by tetramethylammonium hydroxide, with or without sodium counterions. While polymer diffusion could not be detected since its T2 was too short, TMAOH and water diffusion was measured as function of degree of neutralization a, or Na+ content. A pronounced minimum of D(TMAOH) near a = 1 was interpreted in terms of a two-site model, leading to the determination that at a = 1, approximately half of the counterions are bound in both systems. Fourier transform techniques permitted the simultaneous measurement of diffusion of water and TMAOH. [Pg.24]

Gene regulatory proteins in bacteria were predicted (before their precise structure was known) to interact in the major groove of DNA by a two-site model of binding. Describe the data that showed this model to be correct. [Pg.799]

The effective local temperatures in both sites were determined. By combining the relative sonochemical reaction rates for equation 5 with the known temperature behavior of these reactions, the conditions present during cavity collapse could then be calculated. The effective temperature of these hotspots was measured at 5200 K in the gas-phase reaction zone and 1900 K in the initially liquid zone (6). Of course, the comparative rate data represent only a composite temperature during the collapse, the temperature has a highly dynamic profile, as well as a spatial temperature gradient. This two-site model has been confirmed with other reactions (27,28) and alternative measurements of local temperatures by sonoluminescence are consistent (7), as discussed later. [Pg.256]

Fig. 1 a. Two-site model b Schematic view of the effect of external force p acting on the motional unit in the two-site modd... [Pg.124]

Nevertheless, it must be pointed out that the two-site model lacks physical significance if we consider that there is probably a much broader distribution of... [Pg.125]

Further experiments, involving co-adsorption of molecular NO and its own dissociation products, support this two-site model. Energy loss spectra are shown in Figs. 6 and 7 where the Ru(001) surface was treated sequentially as follows (a) It was exposed to NO at 150 K (b) It was heated to a temperature sufficient to... [Pg.198]

The experimental data of Figs. 6 and 7 provide strong support for the two-site model of adsorption of NO. The dissociation products of NO occupy the same sites on the Ru(001) surface as the bridged state of molecular NO. When the initial coverage of dissociation products is sufficiently high, as in Fig. 7, the surface is poisoned with respect to subsequent adsorption of bridged NO. [Pg.203]


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See also in sourсe #XX -- [ Pg.290 , Pg.374 , Pg.375 ]

See also in sourсe #XX -- [ Pg.209 , Pg.214 ]




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