Daniel McDonald and Jack Gilbert (both University of California, San Diego; CA, USA) discuss the challenges faced during fecal sample collection and highlight important factors to consider when ...
The appropriate procedure for obtaining a nasopharyngeal swab specimen, as shown in the video by Marty et al. (published on April 17 at NEJM.org), 1 is of paramount importance. Proper collection of a ...
The Izod impact test fixes one end of a notched specimen in a cantilever position by means of a vice. A striker on the arm of a pendulum or similar energy carrier then strikes the specimen. The energy ...
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