Temperature dependence of intensities

MCD studies, temperature dependence of intensity, 36 249 models, 39 36-41 resting state, 39 40-41 peroxidase, 36 235-237, 43 79 active-site structure, 43 81-83 bimolecular reaction, 43 98-99... 

V. I. Bukhtoyarova and M. V. Tonkov. Intermolecular interactions in compressed gases from translational absorption spectra II Temperature dependence of intensity. Opt. Spectrosc., 43 133, 1977. 

Fig. 2. Temperature dependence of intensity of fluorescence of auramine O in polystyrene film open circles, heating from room temperature to the melting point filled circles, cooling and solidifying the melt (70)...

From the experimental point of view, it was realized that the systems which showed ix , behavior should display ESR lines from the (upper) coupled states, iSx = 2 and St = 1, at appropriate temperatures, perhaps displaying hyperfine splitting and having a characteristic temperature dependence of intensity. Theoretical calculations (276) and observed ESR lines from the St = 2 levels on single crystals of [CU4-0(Cl)6(0PPh3)4] (277) and powders of [Cu40(Cl)g(quinoline)4] (278)... 

Fig. 16a and b. Temperature dependence of intensity distribution of polyMMA radical (a) in anisole at —120 °C (b) in benzonitrile at indicated temperatures... 

The enthalpy of the adsorption of chlorobenzene was determined from the temperature-dependence of the SERS intensities [4.301]. 

Fig. 9. Normalised temperature dependence of the ESR intensity for an SWCNT sample [40],...

Vapor pressure, like density and solubility, is an intensive physical property that is characteristic of a particular substance. The vapor pressure of water at 25°C is 23.76 mm Hg, independent of volume or the presence of another gas. Like density and solubility, vapor pressure varies with temperature for water it is 55.3 mm Hg at 40°C, 233.7 mm Hg at 70°C, and 760.0 mm Hg at 100°C. We will have more to say in Chapter 9 about the temperature dependence of vapor pressure. 

In retrospect, by inspecting the literature, we find a confirmation of this variance (see for instance Ref. [67]). Peak intensities of bands originally assigned to Franck-Condon components of the excilonic emission have random relative intensities. This would not be possible if the bands were intrinsically vibronic. Since we know that the excilonic emission, as it is observed in single crystals, is rather sharp at low temperatures, we were forced to reconsider the assignment of the fluorescence of thin films. From the temperature dependence of the fluorescence effi-... 

The model [39] was developed using three assumptions the conformers are in thermodynamic equilibrium, the peak intensities of the T-shaped and linear features are proportional to the populations of the T-shaped and linear ground-state conformers, and the internal energy of the complexes is adequately represented by the monomer rotational temperature. By using these assumptions, the temperature dependence of the ratio of the intensities of the features were equated to the ratio of the quantum mechanical partition functions for the T-shaped and linear conformers (Eq. (7) of Ref. [39]). The ratio of the He l Cl T-shaped linear intensity ratios were observed to decay single exponentially. Fits of the decays yielded an approximate ground-state binding... 

The recoil-free fraction depends on the oxidation state, the spin state, and the elastic bonds of the Mossbauer atom. Therefore, a temperature-dependent transition of the valence state, a spin transition, or a phase change of a particular compound or material may be easily detected as a change in the slope, a kink, or a step in the temperature dependence of In f T). However, in fits of experimental Mossbauer intensities, the values of 0 and Meff are often strongly covariant, as one may expect from a comparison of the traces shown in Fig. 2.5b. In this situation, valuable constraints can be obtained from corresponding fits of the temperature dependence of the second-order-Doppler shift of the Mossbauer spectra, which can be described by using a similar approach. The formalism is given in Sect. 4.2.3 on the temperature dependence of the isomer shift. 

It has been shown that the rate constants obtained from the slopes of In [intensity] versus plots approximate the rates of the highest-probability matrix sites. Hence, workers have utilized the temperature dependence of these values, or other empirically derived stretched exponential time dependencies, to estimate low temperature Arrhenius plots. The validity of such methods, however, depends critically on obtaining accurate time-dependence data on the fastest matrix sites, which is increasingly difficult as temperatures are raised. 

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