For your eyes too: a new set of images of biological materials from the scientific commissioning of the MOGNO beamline at Sirius

The high-energy imaging beamline MOGNO was recently designed, installed and commissioned at the Sirius fourth-generation synchrotron radiation source at the LNLS in Brazil. MOGNO, a micro- and nano-imaging beamline, has as primary source a 3.2 T superbend permanent magnet dipole with a critical energy of 19.15 keV and operates in a cone-beam geometry. The present paper addresses the commissioning experiments in propagation-based phase-contrast imaging and microtomography, revealing high-precision details of a wide range of non-stained biological samples with minimal preparation. We illustrate the potential of non-destructive fast high-resolution microtomographic imaging, particularly for fine anatomical studies of Brazilian biological specimens. Three-dimensional investigations reveal the internal morphology of the head of a dengue fever vector mosquito (Aedes aegypti) and of the whole embryo of a reptile (Brasiliscincus agilis) and of an amphibian (Eleutherodactylus cochranae), as well as the features inherent in an archaeological artefact (Galeocerdo cuvier tooth) and a fish fossil bone (Elopomorpha incertae sedis).