Publications by authors named "J A Strayer"

Article Synopsis
  • - Magnetic nanoparticles (MNPs) are tiny particles (1 to 100 nanometers) made from magnetic materials, possessing unique properties that differ from larger forms; they are increasingly used in various fields such as medicine and technology.
  • - Their small size and magnetic behavior allow for manipulation with external magnetic fields, making them useful for targeted medical applications like drug delivery and imaging, while also being explored for environmental and energy-related uses.
  • - Despite the growing applications of MNPs, there are important concerns about their safety, such as potential toxicity and how they interact with cells, which is becoming a focus of both research and clinical studies.
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With the growing array of challenges humanity has been experiencing since the global pandemic, knowledge workers at all levels of organizations are experiencing a noted increase in the volatility, uncertainty, complexity, and ambiguity (VUCA) conditions of their work and lives. This has brought about significant changes in ways of working and associated ways of being that have become more fragmented and virtual. Disruptive change continues to unfold on many levels of society, from the organizational to the individual level, with multiple and often unintended consequences.

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Daptomycin is a common treatment for serious infections caused by gram-positive bacteria in adult patients; however, data regarding its safety and efficacy in the pediatric population are limited. This was a retrospective chart review of adverse reactions and treatment outcomes associated with daptomycin use in children <13 years old who received at least 1 dose of daptomycin. At least 1 dose of daptomycin was received by 147 patients.

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Magnetic nanoparticles (MNPs) have recently gained significant attention in various fields, including chemical and biomedical applications, due to their exceptional properties. However, separating MNPs from solution magnetophoresis is challenging when MNPs are smaller than 50 nm as Brownian forces become on the order of the magnetic forces. In this study, we successfully separated small MNPs (5-30 nm) by utilizing high magnetic fields and gradients generated by economical permanent magnets.

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Precisely and accurately determining the magnetic force and its spatial distribution in microfluidic devices is challenging. Typically, magnetic microfluidic devices are designed in a way to both maximize the force within the separation region and to minimize the necessity for knowing such details-such as designing magnetic geometries that create regions of nearly constant magnetic force or that dictate the behavior of the magnetic force to be highly predictable in a specified region. In this work, we present a method to determine the spatial distribution of the magnetic force field in a magnetic microfluidic device by particle tracking magnetophoresis.

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