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https://www.selleckchem.com/products/prostaglandin-e2-cervidil.html Moreover, the device can be reused as sampler and sensor (until three times without loss of electrochemical performance) and the fabrication is reproducible (RSD = 7%, for three different devices). Hence, this 3D-printed material is an excellent candidate for the analysis of GSR, an indispensable analysis in the forensic field.We have developed an upconversion nanoparticles (UCNPs) based fluorescence immunoassay for simultaneously detecting tyramine and histamine in foods. The anti-tyramine and anti-histamine antibody were linked to NaYF4Yb, Tm (emission at 483 nm) and NaYF4Yb, Er (emission at 550 nm) UCNPs as multicolor signal probe, respectively. The tyramine and histamine coating antigen were connected to magnetic microspheres as capture probe, respectively. Base on a competitive format, capture probes compete with analytes to combine corresponding signal probes. Under excitation at 980 nm, the formed competitive immune-complex fluorescent signal at 483 and 550 nm indicates concentration of tyramine and histamine, respectively. This immunoassay has detection linear from 0.5 to 100 μg L-1 with limit of detection (LOD) of 0.1 μg L-1 for tyramine, and 0.1-100 μg L-1 with LOD of 0.01 μg L-1 for histamine, respectively. This multiplexed analysis format has potential applications for rapid, efficient detecting multiple food risk factors.Highly specific and sensitive detection of single-nucleotide variants (SNVs) is of central importance in disease diagnosis and pharmacogenomics. However, it remains a great challenge to successfully detect very low amounts of mutant SNV sequences in real samples in which a SNV sequence may be surrounded by high levels of closely related wild-type sequences. Herein, we propose an ultra-specific and highly sensitive SNV sensing strategy by combining the competitive sequestration with the nonlinear hybridization chain reaction (HCR) amplification. The rationally designed s

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