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Concern exists about whether or not multiplex assays are sensitive enough to detect subtle yet biologically relevant changes in circulating concentrations of inflammatory biomarkers such as interleukin (IL)-6 in healthy humans. We tested two different multiplex kits (human Magnetic Luminex Performance Assay, R&D Systems [Minneapolis, MN]; and human Cytokine/Chemokine Magnetic Bead Panel, Millipore...
This paper describes a study of the use of ultrasound to measure the pressure between two machine elements in contact. Relationships between ultrasonic reflection coefficient and pressure have been found both empirically and via a numerical contact model. The numerical contact model was used to predict the stiffness of the interface. This stiffness was then converted to ultrasonic reflection coefficient...
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