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The utilisation of magnetic nanoparticles for magnetically confining and concentrating target analytes in a microscopic volume for in situ optical detection significantly improves the selectivity and sensitivity of DNA sensors.
Results for all these samples (non-purified His-tagged bacteriophage T7, His-tagged Escherichia coli ribosomes, native Sindbis virus, and purified but low-concentration native Tulane virus) demonstrated the capability of cryo-SPIEM approach in specifically trapping and concentrating target particles on TEM grids with minimal view constraints for cryo-EM imaging and determination of 3D structures.
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The basic strategy for this approach is the use of trapping probes to concentrate target DNAs selectively from complex samples.
However, this is possible using an adequate tissue preparation method to concentrate target cells prior to plating.
Therefore, a representative quantity of tissue and subsequent tissue preparation to concentrate target cells are essential for precise quantification.
We believe once optimized, the novel approach of utilizing ATPS to concentrate target molecules, such as infectious viruses, prior to the detection step could significantly improve the sensitivity of LFA, which in turn could enhance its effectiveness as a POC solution for preventing pandemic outbreaks.
Moreover, magnetic beads may also be applied to capture and concentrate targets other than NA for multiplex analysis.
In these cases, g-iDEP would offer improved results obtained from traditional methods by first removing interfering components and concentrating the target.
Therefore, we demonstrated proof-of-principle that concentrating a target virus with ATPS prior to the detection step enhances the detection limit of the LFA, thereby increasing the sensitivity of the immunoassay.
The focus of this work is on the latter approach, and we investigated concentrating a target virus using an aqueous two-phase system (ATPS) prior to its detection via LFA.
To woo Target, van Stolk flew to Minneapolis eight times in eight months, peddling the idea of selling concentrate; Target's own bottlers fill 12-ounce cans and package them into fridge-friendly 12-packs.
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