Radiographical study of skull fragment of Venta Micena (VM-0) (Orce, Granada Spain)

Since 1983, the Orce skull has been a polemic piece. The last article which refuses the human affinity of VM-0 is based on the presence of a supposed coronalis suture in VM-0 situated at 40mm of lambda point (Moyà-Solà &; Khöler 1997). This would imply that VM-0 belonged to a very small skull not possible in human genus. The present detailed x-ray study which includes: “classic x-ray”, digital x-ray, macro x-ray and computerized tomography, proves definitively the not presence of coronalis suture in VM-0 and demonstrate that all interpretations based on the presence of coronalis suture are a great mistake. Also this study shows different characters which prove the human affinity of VM-0: presence of a wide sulcus sagittalis (9mm), the print of the superior sinus sagittalis where drained venous blood of a big brain is not possible in a colt whose brain size is similar to that of sheep. We consider that the visual inspection is not enough in human Palaeontology and it is incorrect to not apply the different tests which permit proving or refusing the different subjective impressions.     

Translocation and loss of phosphate along roots of wheat seedlings

Summary Sites of phosphate uptake, translocation and loss along sterile roots of 5-day-old wheat seedlings were obtained using an automatic scanning method. Highest uptake occurred in the apical centimetre of the primary root and in the lateral root zone although appreciable uptake occurred along the whole of the root. 68% of absorbed phosphate was translocated from the apex, 84% from the midroot portion and 87% from the lateral root zone after 24 hr. Profuse production of lateral roots is seen as important in phosphate uptake and translocation.Losses of absorbed phosphate from root to solution were small and the patterns of such losses along the root corresponded with the patterns of uptake by the root. Patterns of net flux of phosphate along the root are likely to be identical with those for influx. Patterns of phosphate loss along the root are in marked contrast to those reported for chloride efflux and loss of organic materials.