influence of aluminum, gallium, indium- doping on the boron-nitride nanotubes (bnnts) investigated with density functional theory (dft) and hartreefock (hf) methods. for this purpose, the chemical shift of difference atomic nucleus was studied using the gauge included atomic orbital (giao) approch. in the following, structural parameter values, electrostatic potential, thermodynamic parameters,...

Received 7/15/2009; revised 7/31/2009; accepted 7/31/2009. For correspondence and reprints contact: Shih-Chuan Tsai, M.D., Department of Nuclear Medicine, Taichung Veterans General Hospital. 160 Section 3, Taichung Harbor Road, Taichung 407, Taiwan. Tel: (886)4-23592525 ext. 4801, Fax: (886)423741348, E-mail: [email protected] We present the case of a 62-year-old man experiencing persistent f...

the production and application of pet tracers has been a unique step in the progress of nuclear medicine in last two decades. the most important pet tracers include f-18, c-11 and n-13 radioisotopes and many nuclear medicine centers throughout the globe are using them. however some new tracers are under their way to the mass administration, currently being in the clinical trials or preliminary ...