Abstract Iron speciation in ancient sedimentary rocks is widely used to reconstruct oceanic redox conditions over geological time, specifically assess the extent of oxic, euxinic (anoxic containing sulfide), and ferruginous iron) conditions. We explore how post-depositional processes can skew particular geochemical signals rock record. One such process when aqueous sulfide—including that produc...

Triassic tetrapods are of key importance in understanding their evolutionary history, because several tetrapod clades, including most of their modern lineages, first appeared or experienced their initial evolutionary radiation during this Period. In order to test previous palaeobiogeographical hypotheses of Triassic tetrapod faunas, tree reconciliation analyses (TRA) were performed with the aim...

One of the more vexing issues in ecology is how historical processes affect contemporary patterns of biodiversity. Accordingly, few models have been presented. Two corollary models (centre of origin, time-for-speciation) can be used to make quantitative predictions characterizing the tropical niche conservatism hypothesis and describe diversification as diffusion and subsequent cladogenesis of ...

Copper (Cu) and stainless steel 316 L are widely used for biomedical applications, such as intrauterine devices orthopedic/dental implants. Amino acids abundantly present in biological environments. We investigated the influence of select amino on corrosion Cu under naturally aerated deaerated conditions using a phosphate-free buffer. increased both aeration at pH 7.4. release was also signific...