The development of novel morphologies and the circumstances under which they arise and diversify are major research foci in evolutionary developmental biology. Horned beetles in the genus Onthophagus provide excellent opportunities to address the development of novel morphologies because they exhibit a great diversity of horn structures that lack direct homology to any other insect appendages. ...

La correcta gestión energética de las fuentes propulsión y almacenamiento un vehículo eléctrico híbrido permite disminuir el uso combustible, operar en forma más eficiente aumentar tiempo vida los componentes. En presente artículo se estudian diversas técnicas control para con motor hidrógeno como fuente generación principal; baterías/supercapacitores combinadas almacenamiento. Se hace una comp...

Uric acid accumulates in several tissues of the Indian apple snail, P. globosa, during aestivation. This accumulation is particularly high in the foot muscle and reproductive organs. Since the kidney, a tiny organ in the snail, has only a limited capacity to store uric acid, extrarenal tissues are used as storage depots of uric acid during aestivation. It is suggested that the aestivating snail...