The issues of repeatability, accuracy and correlation are inherent to microhardness testing. However, by using properly maintained and calibrated equipment, trained ...

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Dental enamel is a highly mineralized tissue that is mainly composed of a ‘non-stoichiometric’ form of hydroxyapatite (HAp). During enamel erosion by acidic beverages, acidic active agents in ...

INDIANAPOLIS—As the organization dedicated to setting and updating shaft seal standards, the Association for Rubber Products Manufacturers has released the revamped OS-3 standard for dynamic oil seals ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...