Influence of stress corrosion on the mechanical properties of laser-welded titanium.

Statement Of Problem: Whether laser-welded (LW) titanium can resist the stress corrosion produced by the combination of fluoride ions and stress in the oral environment is unknown.

Purpose: The purpose of this in vitro study was to investigate the influence of stress corrosion on the mechanical properties of LW titanium.

Material And Methods: Twenty-seven titanium bars (25×2 mm) with a circular cross-section were cut in half and laser-welded, while another 27 nonwelded (NW) bars were used as the control.

Lipase production in solid-state fermentation monitoring biomass growth of aspergillus niger using digital image processing.

The aim of this study was to monitor the biomass growth of Aspergillus niger in solid-state fermentation (SSF) for lipase production using digital image processing technique. The strain A. niger 11T53A14 was cultivated in SSF using wheat bran as support, which was enriched with 0.