Hydrofluoric acid alkylation ABB and ConocoPhillips develop a critical new process analysis tool
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Effect of hydrofluoric acid concentration and etching time on the surface roughness of CAD/CAM ceramics
Introduction: Dental ceramics are considered as materials that can restore the appearance of natural teeth. Etching the inner surface of a ceramic restoration with hydrofluoric acid (HF) followed by using a silane coupling agent is a well-known and recommended method to increase the bond strength. The aim of etching on ceramic structure is to enhance the surface roughness (Ra) and energy and to...
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Engineer for John Crane Inc., in Morton Grove, Illinois. His responsibilities include recommending, designing, and troubleshooting sealing systems for the Midwest states. He spent 10 years as a Senior Design and Applications Engineer before becoming a Regional Engineer. Before John Crane, Mr. Kozlowski was a Design and Test Engineer for Aetna Bearing Company, in Chicago, where he was involved w...
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Hydrofluoric acid has been used as a novel stripping agent for molybdenum (VI) after its extraction with Cyanex 301. In the extraction steps effects of parameters such as type and initial concentration of acid, type of diluent, extractant concentration, metal concentration and temperature have been studied. In thestripping step, the effects of various stripping agents on stripping efficiency ha...
متن کاملThe Role of DNA Mismatch Repair and Recombination in the Processing of DNA Alkylating Damage in Living Yeast Cells
It is proposed that mismatch repair (MMR) mediates the cytotoxic effects of DNA damaging agents by exerting a futile repair pathway which leads to double strand breaks (DSBs). Previous reports indicate that the sensitivity of cells defective in homologous recombination (HR) to DNA alkylation is reduced by defects in MMR genes. We have assessed the contribution of different MMR genes to the proc...
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تاریخ انتشار 2007