Optimization of conditions for selective dissociation of trifluorobromomethane molecules in carbon isotope separation

Abstract

Precise measurements have been made of the rate of sedimentation of whole blood in which the concentrations of red blood cells and the plasma proteins have been systematically varied. The contribution of each factor to the sedimentation process is expressed in terms of three parameters that describe the sedimentation c w e : the set-up time, and the slopes of the fint and second phases of settling. This analysis affords delination between the onset and the degree of aggregation of the red blood cells as contributors to the usual ESR value. the height of plasma in a 200 nm blood column after 60 min. In t e m of the 60 min ESR value, an increase in the haematocrit or albumin concentration inhibits sedimentation, the latter only slightly. whereas an increase in the concentration of globulin or fibrinogen accelerates sedimentation. with fibrinogen showing the more marked effect.

Effect of NO on the Isotopically Selective Dissociation of CF3Br with a Transversely Excited Atmospheric CO2 Laser

“…Due to the different experimental conditions, it is difficult to compare in detail their results with ours. Avatkov et al and Parthasarathy et al , have observed, as we do, that the dependence of the enrichment factor on the irradiation fluence is strong, and they used fluences between 2.6 and 3, while we use from 0.98 to 1.7 J/cm 2 .…”

“…The multiple photon dissociation (MPD) of polyatomic molecules has been studied by several authors. − We have studied the MPD of pure CF 3 Br and mixtures with monatomic (He, Ar, and Xe), diatomic (H 2 , D 2 , and N 2 ), and polyatomic (CF 4 ) gases. , The experiments were carried out by irradiating with a transversely excited atmospheric (TEA) CO 2 laser, at different temperatures, pressures, and fluences. Mixtures of CF 3 Br with different gases − have also been studied by MPD, following the effect of the presence of these gases on the carbon-13 enrichment. They observed that the enrichment factor tends toward 1 as the total pressure increases, when irradiating with laser lines between 1035 and 1050 cm -1 , as we do.…”

“…10,11 The experiments were carried out by irradiating with a transversely excited atmospheric (TEA) CO 2 laser, at different temperatures, pressures, and fluences. Mixtures of CF 3 -Br with different gases [12][13][14][15][16] have also been studied by MPD, following the effect of the presence of these gases on the carbon-13 enrichment. They observed that the enrichment factor tends toward 1 as the total pressure increases, when irradiating with laser lines between 1035 and 1050 cm -1 , as we do.…”

Carbon Isotope Selective Separation From MPD of CF3Br With a TEA CO2 Laser

“…The process of isotopic selective multiphoton dissociation (MPD) of polyatomic molecules in the gas phase has been amply studied by several authors [1][2][3][4][5][6][7][8][9]. Pure CF3Br and mixtures with different gases have been also studied by MPD [10][11][12][13][14][15]. These studies reveal that the wavelength is the most relevant parameter to attain selectivity.…”