Roca dels Bous (archaeological site) interesting archaeological site indeed. Furthermore, it is to be noted that the samples used for the 14C AMS dating were obtained from deep strata at the site. The oldest Neanderthal sites known in the nearby areas date back to around 40,000 BP. The first settlements attributed to “anatomically modern” Homo sapiens sapiens in Northern Spain are dated around 39,000-38,000 BP. All this would suggest that Neanderthals could have persisted in this particular area longer than previously believed, preceding the arrival of the first Homo sapiens to the area. Research work began in 1988. This wide period of time has contributed
Pertechnetate is found in a Meckel's diverticulum with Meckel's scans. All technetium salts are mildy radioactive, but some of them have explored use of the element for its chemical properties. In these uses, its radioactivity is incidental, and generally the least radioactive (longest-lived) isotopes of Tc are used. In particular, Tc (half-life 211,000 years) is used in corrosion research, because it is the decay product of the easily obtained commercial Tc isotope, which is its nuclear isomer. In theory, the longest-lived technetium isotope, Tc (half-life 4.2 million years), would be the optimal isotope for this use. Solutions of technetate(VII) react with