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Natural variation of the nef gene in human immunodeficiency virus type 2 infect...
Pádua, E.; Jenkins, A.; Brown, S.; Bootman, J.; Paixão, M.T.; Almond, N.; Berry, N.Human immunodeficiency virus type 2 (HIV-2) infections cause severe immunodeficiency in humans, although HIV-2 is associated frequently with reduced virulence and pathogenicity compared to HIV-1. Genetic determinants that play a role in HIV pathogenesis are relatively poorly understood but nef has been implicated in inducing a more pathogenic phenotype in vivo. However, relatively little is known about the role...
The anomalous dispersion of the disorder-induced and the second-order Raman Ban...
Pimenta,M. A.; Hanlon,E. B.; Marucci,A.; Corio,P.; Brown,S. D. M.; Empedocles,S. A.; Bawendi,M. G.; Dresselhaus,G.; Dresselhaus,M. S.In this work we have studied the dispersion of the disorder-induced (D) and the second-order (G') Raman bands in single wall carbon nanotubes using several laser excitation energies (E laser) in the range 1.5-3.0 eV. An anomalous step-like behavior was observed in the E laser dependence of the G'-band frequency. This result is interpreted as a manifestation of the one-dimensional (1D) behavior of the phonon spe...
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