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Enhanced tuneable rotatory power in a rotating plasma.
Phys Rev E
November 2020
Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08540, USA.
The gyrotropic properties of a rotating magnetized plasma are derived analytically. Mechanical rotation leads to a new cutoff for wave propagation along the magnetic field, and polarization rotation above this cutoff is the sum of the classical magneto-optical Faraday effect and the mechanico-optical polarization drag. Exploiting the very large effective group index near the cutoff, we expose here that polarization drag can be 10^{4} larger than Faraday rotation at GHz frequency.
View Article and Find Full Text PDFThe behavior of a Faraday-active turbid medium under ultrafast optical excitation is investigated. As the degree of polarization of early arriving photons is mostly preserved during the first 100 ps after the arrival of the ballistic component, the possibility of using the magneto-optical rotation of the light polarization as a new tool for tissue characterization is addressed. A technique is proposed for determining photon-scattering statistics in turbid biological media.
View Article and Find Full Text PDFOn the allosteric transition between the structures of high and low ligand affinity in carp hemoglobin.
Biochim Biophys Acta
October 1976
The variation of magneto-optical rotatory dispersion with pH for carp deoxyhemoglobin in the presence and absence of inositol hexaphosphate was interpreted as a pH-induced allosteric transition between the structures of high and low ligand affinity (the R and T states in terms of the two state model of cooperativity). Increasing the pH from 6 to 11 causes a decrease in the fraction of molecules in the T state from 1 to 0.65.
View Article and Find Full Text PDFMethods of magnetic optical activity, magneto-optical rotatory dispersion (MORD) and magnetic circular dichroism (MCD), were shown to be sensitivie to the quaternary structure of deoxyhemoglobin. The isolated alpha and beta chains, the monomeric hemoglobins (leghemoglobin, fraction III of Chironomus thummi thummi hemoglobin) and hemoglobin in the R state (hemoglobin digested with carboxypeptidases A and B) exhibit in the visible region two MORD minima of equal intensities. In native tetrameric hemoglobins studied (human, horse, porcine, feline, carp, tortoise, frog) the ratio of the intensities of these MORD minima is about 2.
View Article and Find Full Text PDFI. Analysis of the dication of deuteroporphyrin in the Q-band region. Methods for quantitative analysis of absorption spectra and magneto-optical rotatory dispersion with regard to zero-field splitting of a nearly degenerated term for the latter are described.
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