Spectrum distribution

Miconazole [my KON a zole], clotrimazole [kloe TRIM a zole], and econazole [e KON a zole] are topically active drugs and are only rarely administered parenterally because of their severe toxicity. Their mechanism of action, antifungal spectrum, distribution, and type of metabolism are the same as ketoconazole. 

The intensity derived from Afoi(so) will appear in the absorption spectrum distributed over the electronic origin and totally symmetric vibronic bands according to the Franck-Condon principle. This follows from the fact that a rigid molecular framework is assumed in the mixing... 

Calculations have been done for the rheological model [7.2.25] with 20 relaxation elements in the spectrum, distributed according to the law [7.2.29] with z = 2. To illustrate the contribution of rheological non-linearity in equation [7.2.25] the numerical coefficient a (a=l or 0) was introduced in the term with containing material derivative. The value a=l... 

Spectrum Distribution of (co-)variance over frequencies or wave numbers. 

Figure Al.7.12. Secondary electron kinetic energy distribution, obtained by measuring the scadered electrons produced by bombardment of Al(lOO) with a 170 eV electron beam. The spectrum shows the elastic peak, loss features due to the excitation of plasmons, a signal due to the emission of Al LMM Auger electrons and the inelastic tail. The exact position of the cutoff at 0 eV depends on die surface work fimction.

Photoelectron spectroscopy provides a direct measure of the filled density of states of a solid. The kinetic energy distribution of the electrons that are emitted via the photoelectric effect when a sample is exposed to a monocluomatic ultraviolet (UV) or x-ray beam yields a photoelectron spectrum. Photoelectron spectroscopy not only provides the atomic composition, but also infonnation conceming the chemical enviromnent of the atoms in the near-surface region. Thus, it is probably the most popular and usefiil surface analysis teclmique. There are a number of fonus of photoelectron spectroscopy in conuuon use. 

Alternatively, in the gas phase one may be able to tell the direction of polarization in the molecular framework by looking at the intensity distribution among the rotational lines in a high-resolution spectrum. 

It is well known that the electron-impact ionization mass spectrum contains both the parent and fragment ions. The observed fragmentation pattern can be usefiil in identifying the parent molecule. This ion fragmentation also occurs with mass spectrometric detection of reaction products and can cause problems with identification of the products. This problem can be exacerbated in the mass spectrometric detection of reaction products because diese internally excited molecules can have very different fragmentation patterns than themial molecules. The parent molecules associated with the various fragment ions can usually be sorted out by comparison of the angular distributions of the detected ions [8]. 

Figure B2.5.12 shows the energy-level scheme of the fine structure and hyperfme structure levels of iodine. The corresponding absorption spectrum shows six sharp hyperfme structure transitions. The experimental resolution is sufficient to detennine the Doppler line shape associated with the velocity distribution of the I atoms produced in the reaction. In this way, one can detennine either the temperature in an oven—as shown in Figure B2.5.12 —or the primary translational energy distribution of I atoms produced in photolysis, equation B2.5.35.

Figure 10. Level spaeitig distributions P s/ s)) for the cone states of the first-excited electronic doublet state of Li3 with consideration of GP effects [12] (a) Ai symmetry (b) A2 symmetry (c) E symmetry (d) full spectrum. Also shown by the solid lines are the corresponding fits to a Poisson distribution.

---