understanding of the natural history of chronic hbv infection is useful for presenting the optimal management of chronic hbv infection. the aim of this study was to evaluate the natural history of chronic hepatitis b infection.in this cross sectional study, 219 untreated chronic hepatitis b patients from jan. 2010 to aug. 2012 were included. the subjects were classified in four groups based on ...

phase sensitive detector described here has two principal applications: a- to produce a d.c out put proportional to- the amplitude of an incoming a,c signal and indicate, by the outut polarity, the phase of the signal with respect to an internal reference. b- to detect the presence of a signal of known phase and frequency which would otherwise be lost in «background noise» and to measure its am...

the immune responses that develop following epstien-barr virus (ebv) infection are complex and involve both humoral and to a greater extent cell-mediated immune mechanisms. to evaluate the immune response, flow cytometric analysis of the peripheral blood of six patients during the acute phase of ebv infection was performed. this analysis revealed a significant increase in the percentages and th...

A theoretical study at the B3LYP/6-31++G(d,p) level was performed on the tatumerization of 7H-purine-2, 6-diamine into 9H-purine-2, 6-diamine. Such a tautomerism can take place via three different pathways namely A, B, and C. The energetic results associated with the gas phase reveal that pathways A, B, and C display a very high activation Gibbs free energy of 45.1, 68.6 and 48.9 kcal/mol, resp...

We propose the decay modes B → a0(→ ηπ)π to determine the CKM phase α. One can analyze these modes through (i) the B → a0π isospin pentagon, (ii) the time dependent Dalitz plot of B0(t) → a±0 π → ηπ+π−, and (iii) the time dependence of B0(t) → a0(→ ηπ0)π0. We show that the a0π modes have certain advantages as compared to the ρπ modes, and strongly recommend the time dependent Dalitz plot analys...

From an estimate of the meson-meson inelastic scattering at 5 GeV it is concluded that a typical strong phase in B decays to two mesons is of order of 20◦. For a particular final state an estimate of the phase depends on whether that state is more or less probable as a final state compared to those states to which it is connected by the strong interaction S matrix. PACS numbers: 13.25.Gv, 11.30...

The ratio of partial decay rates for charged and neutral B mesons to Kπ final states provides information on the weak phase γ ≡ Arg(V ∗ ub) when augmented with information on the CP-violating asymmetry in the Kπ mode. The statistical requirements for a useful determination of γ and certain systematic uncertainties are examined in the light of present information about the decays B → Kπ, B → Kπ,...