Composition controlled synthesis and Raman analysis of Ge-rich Si(x)Ge(1-x) nanowires.

Here, we report the synthesis of Si(x)Ge(1-x) nanowires with x values ranging from 0 to 0.5 using bulk nucleation and growth from larger Ga droplets. Room temperature Raman spectroscopy is shown to determine the composition of the as-synthesized Si(x)Ge(1-x) nanowires. Analysis of peak intensities observed for Ge (near 300 cm(-1)) and the Si-Ge alloy (near 400 cm(-1)) allowed accurate estimation of composition compared to that based on the absolute peak positions. The results showed that the fraction of Ge in the resulting Si(x)Ge(1-x) alloy nanowires is controlled by the vapor phase composition of Ge.

Effect of the hormonal contraception on serum reverse triiodothyronine levels.

Thyroid hormones and the thyroxine-binding globulin are increased during hormonal treatment with oral contraceptives without changes in the thyroidal economy. Now we report that even reverse triiodothyronine, the main peripheral catabolite of thyroxine, is significantly increased during therapy with oral contraceptives.

Some biochemical platelet patterns in stable coronary patients.

Patients affected by stable angina pectoris whose platelets were characterized by ultrastructural alterations, were investigated in some biochemical changes of their platelets. A decrease of P.A.R. (platelet aggregate ratio), an increase of MDA production in particular conditions, nevertheless a stability of cAMP content in platelets, even after thrombin stimulation, were found.