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Showing 1 to 9 of 9 for “"electron spin-lattice relaxation"”.
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Electron spin-lattice relaxation in YB3+ - doped silicate glass
"Relaxation rates of Yb3+ ions incorporated in low concentrations into a host silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature dependence of …
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Electron spin-lattice relaxation in ytterbium ion-doped silicate glass
"Relaxation rates of Yb$\sp{3+}$ ions incorporated in low concentrations into a host silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature …
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Electron spin-lattice relaxation of cytochrome P-450 from Pseudomonas putida
Electron spin-lattice relaxation measurements have been taken on o camphor-free low-spin ferric cytochrome P-450 (mo) and the high-spin species of camphor-bound cytochrome P-450 (mos). Relaxation rates were measured at x-and Ku-band frequencies using the technique of pulse-saturation recovery. The …
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Electron spin-lattice relaxation in proteins, model heme complexes and ferricyanide solutions at helium temperatures
Electron Spin-Lattice relaxation rates are reported for frozen solutions of the blue-copper proteins azurin and plastocyanin, the low-spin iron heme protein cytochrome-c, two (bis)imidazole ferric heme complexes in three different organic solvents and two ferricyanide solutions. Measurements were …
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Electron spin-lattice relaxation in two heme iron and two blue-copper proteins at liquid helium temperatures
The relaxation rates in frozen aqueous solutions of whale ferri-myoglobin azide, bovine ferri-hemoglobin azide, cupric azurin (P. aeruginosa) and cupric spinach plastocyanin were measured at 9.5 GHz using the pulse-saturation recovery method. Measurements covered a temperature range of 1.4 K to as …
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Spin lattice relaxation studies on iron proteins
… and refined. The temperature dependence of electron spin-lattice relaxation stimulated by Raman phonon scattering is measured in low spin ferric proteins. The data are analysed to yield the spectral dimension, a parameter characterizing the protein vibrational dynamics. Protein X-ray …
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Development of Low Frequency Electron Paramagnetic Resonance Methods and Instrumentation for Biological Applications
… 250 MHz and 1 GHz were developed.</p> <p>At low spin concentrations, the rapid scan background signal is often many times larger than the EPR signal of interest. To help remove the background contribution, a data acquisition procedure that takes advantage of a cross-loop resonator and bipolar …
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Strain-modified spin-lattice relaxation rates in some rare earth salts
"An examination was made of the electron spin-lattice relaxation rates of Ce and Er in LaCl3 progressively strained by replacing a small fraction of the ct ions by Br and also Nd in lanthanum magnesium nitrate (LMN) similarly strained with Zn replacing Mg in order to test our proposal that …
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Measured electron spin relaxation rates in frozen solutions of azurin: Vitamin B12r and nitrosyl ferrous myoglobin
Measured electron spin-lattice relaxation rates in frozen glycerin/water solutions at temperatures from 1.4 K to 20 K are reported for a copper-containing protein, azurin, and a cobalt -containing bi omol ecul ar complex, vitamin B 12r, which is the paramagnetic product of the photolysis of …