Project title
This work was supported by the Portuguese Foundation for Science and Technology, FEDER and COMPETE [PTDC/SAU-FCF/099082/2008; PTDC/SAUFCF/ 70384/2006; PTDC/SAU/NEU/73119/2006; SFRH/BD/30608/2006; SFRH/BD/29479/2006; SFRH/BPD/62945/2009; SFRH/BD/45311/2008, SFRH/BPD/49079/2008; SFRH/BPD/46086/2008; SFRH/BPD/31547/2006]