in this study, the vertical, transverse and oblique diameters of the spinal cord segments (c1, c6, c12, c18, t1, t4, l1, l4, l6 and l8) and the ratio of gray matter to white matter in chick (l month) and adult (18 months) male ostriches, each group consisted of 3 animals, were measured with standard micrometric method using 6 μm thick sections by light microscope. with advancement of age, the r...

BACKGROUND A majority of published studies indicate that farmers have an elevated risk of developing non-Hodgkin's lymphoma (NHL) compared to other workers. METHODS We evaluated accidental exposure to pesticides, the use of personal protective equipment, and exposure to animals among male farm residents in a Canadian population-based, multi-centre, NHL-control questionnaire study. RESULTS I...

Flexible manipulators have high degrees of freedom and deformability, enabling dexterous movements allowing for unexpected contacts with the environment. Underactuated tendon-drive mechanisms are most widely adopted because their simplicity effectiveness. However, they suffer from difficulty in modeling achieving dexterity structural stability. In this letter, we focus on ostriches, which can d...

A large incomplete ostrich femur from the Lower Pleistocene of North China, kept at Muséum National d’Histoire Naturelle (Paris), is described. It was found by Father Emile Licent in 1925 Nihewan Formation (dated about 1.8 Ma) Hebei Province. On basis minimum circumference shaft, a mass 300 kg, twice that modern ostrich, obtained. The bone remarkably robust, more so than recent, Late Pleistocen...