Atlas of Chagas disease vectors in the Americas

Authors have studied most of the known species of Triatominae with Scanning Electron Microscopy (SEM) JEOL and HITACHI S-500. They were able to photograph structures in these bugs belonging to the 5 known tribes. 12 of the 14 genera existing on the American Continent and Caribbean Islands, and 98 of the 111 recognized species of the subfamily. It was not possible to study either Bolbodera or Parabelminus with SEM

Passive mechanical properties of the aorta during pregnancy in rats.

The passive mechanical properties of the aorta from rats were investigated on in vitro preparations during pregnancy. At 0 mm Hg, volume was found to be higher in pregnancy than in control series. At the lower pressures of the hysteresis curves, Volumetric Distensibility Modulus was higher in control series than during pregnancy. Hysteresis percentage, and stress relaxation were found to be diminished during pregnancy. The water of the aortic wall was increased from the 14th day of pregnancy. This evidence suggests that during pregnancy there was an increase in volume and vessel turgidity, which could be taken in relationship with the lowering of the fibrous elements folds.