Several samples of fossilized wood (charcoal) were collected in the Papayita archaeological site, in coastal Ecuador.This carbonized material was encountered inside a layer of volcanic ash that sealed the site.The ash-sized tephra was produced by a sub-Plinian eruption from Mucuna Pruriens the Guagua Pichincha volcano contemporaneous with the late
We investigated whole-plant leaf area in relation to ontogenetic variation in leaf-size for a forest perennial herb, Cardiocrinum cordatum.The 200-fold ontogenetic variability in C.cordatum leaf area followed a power-law dependence on total leaf number, a Swim Panty measure of developmental stage.When we normalized for plant size, the function desc
Sexual dysfunction and more specifically erectile dysfunction (ED) can be a harbinger of serious occult medical conditions.ED can be considered a clinical manifestation of generalized vascular disease and therefore shares similar Toy Cars risk factors: aging, hypertension, diabetes mellitus, hypercholesterolemia and smoking.The initial evaluation o
The Sasa Pb-Zn-Ag deposit belongs to the group of distal base metal skarn deposits.The deposit is located within the Serbo-Macedonian massif, a metamorphosed crystalline terrain of Precambrian to Paleozoic age.The mineralization, hosted by Paleozoic marbles, shows a strong lithological control.It is spatially and temporally associated with the calc