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Background correction when reading ELISA with TMB substrate

I'm doing some ELISA development, and I'd like some justification/best practices for background correction. I'm using a horseradish-peroxidase (HRP) detection system along with a TMB substrate and an ...
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Colormetric assay for a phenol product?

I am working on an assay for phenol products created by a colony of bacteria. I have searched up a paper that involves gibbs reageant but the protocol is kind of unclear. Does any of you know where I ...
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What is the probe that absorbs at 450nm in the presence of NADH in this assay?

The colorimetric assays by Biovision and Sigma Aldrich seem to utilise a probe that binds to or reacts with NADH in order to cause absorbance at 450nm which can then be quantified by a ...