Composite surface structures inspired by the functional of Scapharca subcrenata shells can improve tribological properties effectively, composed ordered “U”- shape micro-grooves and solid lubricant Sn-3.0Ag-0.5Cu (SAC305) alloys. A series wear tests were conducted to further investigate formation characteristics self-compensating lubrication film, then mathematical model spreading tribofilm cou...

Mango agribusiness is an expanding activity in Brazil and produces a large volume of waste that are not reused. seeds one the residues from fruit processing, potential starch source. In food industry, used as functional ingredient, allowing preservation important characteristics foods. The objectives this study were to extract mango seed, characterize it terms its physicochemical, technological...

The northwest corner of the MoonÕs South Pole-Aitken (SPA) basin contains a high abundance of thorium and a unique Imbrian aged geomorphologic unit that consists of Ògrooves and moundsÓ (referred to here as the Imbrian grooves). Because the location of these features are almost antipodal to the Imbrium basin, where high-thorium ejecta and seismic energy are expected to have converged, an Imbriu...

STATEMENT OF PROBLEM No study has evaluated the efficacy of auxiliary tooth preparation elements for crowns with originally reduced resistance form. PURPOSE This study evaluated the effects of different auxiliary preparation features on the resistance form of crowns with reduced axial wall and total occlusal convergence. MATERIAL AND METHODS An Ivorine tooth was prepared on a milling machin...

Embryos of the ac/ac maternal-effect mutant in Pleurodeles waltl show disturbed epibolic movement during gastrulation. At the early gastrula stage, ectoderm cells begin to sink in at random sites in the animal half of the embryo. At the advanced gastrula stage the ectodermal pits develop into grooves. Electron microscopical analysis shows that many cells in the bottom of the pits and grooves ha...

Human chromosome polymorphisms were investigated by scanning electron microscopy (SEM). Centromeric heterochromatin was of a constricted morphology. The extent of the C banded region was demarcated by a prominent circumferential groove in G banded chromosomes. Circumferential grooves were observed within the heterochromatin of chromosome 9, and the number of grooves present reflected the size o...

In this paper, the electric-discharge machining (EDM) of non-contact seal grooves was studied. Two types of material, namely: tungsten carbide and silicon carbide were tested by EDM due to their hard machining behaviors. The geometry of seal grooves is another reason why grinding or other precision machining processes cannot be applied. Four parameters of EDM processes were studied, namely: ele...