Spectral Strain parameter

Elastomers are solids, even if they are soft. Their atoms have distinct mean positions, which enables one to use the well-established theory of solids to make some statements about their properties in the linear portion of the stress-strain relation. For example, in the theory of solids the Debye or macroscopic theory is made compatible with lattice dynamics by equating the spectral density of states calculated from either theory in the long wavelength limit. The relation between the two macroscopic parameters, Young s modulus and Poisson s ratio, and the microscopic parameters, atomic mass and force constant, is established by this procedure. The only differences between this theory and the one which may be applied to elastomers is that (i) the elastomer does not have crystallographic symmetry, and (ii) dissipation terms must be included in the equations of motion. 

Spectrum simulation treated the hyperfine interactions by second order perturbation theory and there were distributions in D and E/D, because strain in these parameters dominated the spectra. Spectral features grow in up to 1 equivalent of added Mn(II) at geff = 15.4, 5.3, 3.0 and 2.0 (Bi 1B) and a broad signal with a... 

In order to have a standardized approach, several researchers are developing a protocol to compare obtained mass spectral data to spectral libraries [19-22]. This standardization is especially important when the goal is to differentiate between closely related species or strains. Experimental parameters such as incubation time [19], matrix type, and concentration [20] have been studied extensively. The conclusion of these studies is unanimous experimental spectra should be collected under the same conditions as reference spectra to ensure consistent reproducibility. 

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