Uptake and elimination of 4 labelled lipid-soluble xenobiotics (napthalene, phenanthrene, 2,4,5,2',4',5'-hexachlorobiphenyl (PCB), octachlorostyrene) were studied in 19 anthozoans and 1 hydrozoan ...common to Bermudian waters. The concentration of radioactivity in the tissues was determined using liquid scintillation counting. All organisms tested took up radioactivity from the water. However, elimination rates were very slow compared to those of other marine organisms. Napththalene was the most rapidly eliminated compound of the 4 tested. There was a much higher concentration of phenanthrene in the tissues than octachlorostyrene throughout the entire experiment. Tissue samples from Diploria strigosa taken 9 mo after exposure to PCB contained 84% of the original radioactivity.
Phys. Rev. B. 53, 3912 (1996). The results of magnetoconductivity measurements in GaInAs quantum wells are
presented. The observed magnetoconductivity appears due to the quantum
interference, which ...lead to the weak localization effect. It is established
that the details of the weak localization are controlled by the spin splitting
of electron spectra. A theory is developed which takes into account both linear
and cubic in electron wave vector terms in spin splitting, which arise due to
the lack of inversion center in the crystal, as well as the linear terms which
appear when the well itself is asymmetric. It is established that, unlike spin
relaxation rate, contributions of different terms into magnetoconductivity are
not additive. It is demonstrated that in the interval of electron densities
under investigation (0.98-1.85)*10^(12) 1/cm^2 all three contribution are
comparable and have to be taken into account to achieve a good agreement
between the theory and experiment. The results obtained from comparison of the
experiment and the theory have allowed us to determine what mechanisms dominate
the spin relaxation in quantum wells and to improve the accuracy of
determination of spin splitting parameters in A3B5 crystals and 2D structures.
The results of magnetoconductivity measurements in GaInAs quantum wells are presented. The observed magnetoconductivity appears due to the quantum interference, which lead to the weak localization ...effect. It is established that the details of the weak localization are controlled by the spin splitting of electron spectra. A theory is developed which takes into account both linear and cubic in electron wave vector terms in spin splitting, which arise due to the lack of inversion center in the crystal, as well as the linear terms which appear when the well itself is asymmetric. It is established that, unlike spin relaxation rate, contributions of different terms into magnetoconductivity are not additive. It is demonstrated that in the interval of electron densities under investigation (0.98-1.85)*10^(12) 1/cm^2 all three contribution are comparable and have to be taken into account to achieve a good agreement between the theory and experiment. The results obtained from comparison of the experiment and the theory have allowed us to determine what mechanisms dominate the spin relaxation in quantum wells and to improve the accuracy of determination of spin splitting parameters in A3B5 crystals and 2D structures.
