4 documents found, page 1 of 1
Chemical and mineral comparison of fossil insect cuticles from Crato Konservat ...
Bezerra, Francisco Irineudo; Silva, João H. da; Miguel, Emílio de Castro; Paschoal, Alexandre Rocha; Nascimento Júnior, Daniel Rodrigues doThe Crato Formation palaeoentomofauna from the Lower Cretaceous (Aptian) of northeast Brazil is extremely well preserved. Crato insects are often complete with abdomen, thorax, head, legs, wings articulated and fragile cuticle details observed at the macro and micro scale. The Crato Formation stands out for the high diversity of fossil insects with at least 386 described species, so far. We investigate the pres...
Throwing light on an uncommon preservation of blattodea from the Crato formatio...
Bezerra, Francisco Irineudo; Silva, João Hermínio da; Paula, Amauri Jardim de; Oliveira, Naiara Cipriano; Paschoal, Alexandre RochaFossilization results from several physical-chemical-geological processes. Original labile and non-bioclastic structures rarely survive throughout this process. In particular, the Crato Formation (Araripe Basin) is one of the most significant Cretaceous KonservatLagerstätten due to its well-preserved invertebrates, mainly three-dimensional insects. In general, Crato insects exhibit brown-orange color, constitut...
A microscopia Raman de alta resolução e suas aplicações na ciência dos materiais
Paschoal, Alexandre RochaThe quest for miniaturization of the structures has always been a constant effort of science and technology and today engineering can be thought on the atomic scale. Nowadays, the Abbe diffraction limit has been exceeded and superresolutions are achieved by many optical microscopy techniques. The combination of microscopy techniques with vibrational spectroscopy greatly expanded the set of information that can ...
Polimorfismo conformacional no modafinil investigado através de cálculos DFT e ...
Paschoal, Alexandre RochaPolymorphism, de ned as the ability of a molecule (or a set of molecules) to adopt several packing arrangements, became, in the last decades, a eld of research on its own. Among other advantages of studying polymorphic systems, one can cite the study of the in- uence of molecular packing on solid-state properties, a better understanding of nucleation and crystal growth mechanisms. These advantages became releva...