The ultraviolet-vis spectra indicate no significant shifts in the Soret band
during reduction or oxidation with a LiPF6 electrolyte, demonstrating that the heme chemical structure is not changed even in an O2-containing environment.
Decrease in absorbance of the Soret band
of hemin could be due to the addition of artemisinin or its derivatives.
7 Moreover, use of amber window film on home or car window can reduce exposure to Soret band
The changes of the non-illuminated HPD Soret band in solutions of various pH show that, in a slightly acidic medium, the PS is more aggregated than in neutral or alkaline solution (Fig.
Spectral measurements showed that HPD penetrates into micelles of these detergents; a typical red shift of the Soret band (from 369 to 402 nm) upon increasing the concentrations of TX-100, CTAB, and SDS was observed (Fig.
The Soret band energies of five porphyrins show significant correlations ([absolute val of r] = 0.
Kolling analyzed the Soret band energies of nickel protoporphyrin IX dimethyl ester in a set of 16 solvents with varying polarities and varying polarizabilities and concluded, by grouping solvents according to the Chastrette-Purcell generalized classification system, that the dependence of the Sore t band energies upon solvent polarizability effects is insignificant (Kolling 1989).
The absorption spectra of free-base porphyrins contain a strong Soret band in the blue region and four weaker Q bands in the visible region, while the absorption spectra of metalloporphyrins typically show only two Q bands (the [alpha] and [beta] bands) in addition to the strong Soret band.
Table 2 shows the correlation coefficients for the Soret band energies with respect to the solvent refractive index for the ethyl acetate -- chlorobenzene and ether -- anisole mixtures, and with respect to two functions of refractive index which have been related to polarizability (Renge 1993; Renge 1991).
The dilute in vitro myotome Hb spectra show a distinct Soret band
at 416 nm ([+ or -]1 nm) in air and 430 nm ([+ or -]1 nm) with sodium dithionite; however, the visible peaks were below detectable levels.
1);a broader band appears in the blue region near 340 nm and is also termed the B or Soret band
The Soret bands
for 2 and 3 occurred at 348 and 354 nm respectively.