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- W1448160117 abstract "A turn-on competitive immunoassay using a low-cost Blu-ray optomagnetic setup and two differently sized magnetic particles (micron-sized particles acting as capture particles and nano-sized particles acting as detection particles) is here presented. For Salmonella detection, a limit of detection of 8×10(4)CFU/mL is achieved within a total assay time of 3h. The combination of a competitive strategy and an optomagnetic setup not only enables a turn-on read-out format, but also results in a sensitivity limit about a factor of 20 times lower than of volumetric magnetic stray field detection device based immunoassays. The improvement of sensitivity is enabled by the formation of immuno-magnetic aggregates providing steric hindrance protecting the interior binding sites from interaction with the magnetic nanoparticle labels. The formation of immuno-magnetic aggregates is confirmed by fluorescence microscopy. The system exhibits no visible cross-reaction with other common pathogenic bacteria, even at concentrations as high as 10(7)CFU/mL. Furthermore, we present results when using the setup for a qualitative and homogeneous biplex immunoassay of Escherichia coli and Salmonella typhimurium." @default.
- W1448160117 created "2016-06-24" @default.
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- W1448160117 date "2016-03-01" @default.
- W1448160117 modified "2023-10-14" @default.
- W1448160117 title "Blu-ray optomagnetic measurement based competitive immunoassay for Salmonella detection" @default.
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- W1448160117 doi "https://doi.org/10.1016/j.bios.2015.08.070" @default.
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