Electronegativity Difference as a Descriptor for the Oxidation-Inhibiting Effect of the Alloying Element during the Early Stages of Titanium Oxidation.

Degradation of the mechanical properties of α-titanium, which is used to manufacture parts of jet engines, due to high-temperature oxidation is detrimental for the engine components. Therefore, to overcome this problem there are ongoing endeavors to develop novel oxidation-resistant titanium alloys and improve the properties of the existing ones. In an effort to understand the effect of alloying on oxidation of the α-Ti(0001) surface and to identify descriptors for rational design of oxidation-resistant alloys, in this work, using density functional theory-based calculations, we studied oxygen sorption and surface to subsurface diffusion on pure and alloyed α-Ti(0001) surfaces.

Breast lump as a presentation of a hydatid disease.

Hydatid disease is a lesion caused by larval form of Echinococcus granulosus and is seen endemically in sheep-rearing countries. Humans are intermediate hosts of this organism. The liver is the first filter that stops about 75% of the embryos and the lungs filter another 10%, leaving only 15% to develop into cysts in other organs of the body.