Photoacoustic spectroscopy of Baru – Dipteryx alata Vog A. F.R. Rodriguez, J. G. Santos, L. B. Silveira, A. C. Oliveira, P. C. Morais and O. A.C. Nunes Eur. Phys. J. Special Topics, 153 (2008) 543-546 Published online: 12 March 2008 DOI: 10.1140/epjst/e2008-00504-7