Luminol-based Assay
Luminol-based Assay - Related Videos
03:02
Synthesis of Luminol - Concepts
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2020
Chemical reactions can be classified as endothermic or exothermic depending on whether the reactions absorb or release heat when they change to products. The difference in energy between reactants and products is known as the enthalpy of the reaction. This is found by calculating the difference in energies between the products and the reactants, or ΔH. If ΔH is positive, the reaction is endothermic; if it is negative, the reaction is exothermic. While chemical reactions are traditionally...
13:41
Synthesis of Luminol - Student Protocol
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2020
Source: Lara Al Hariri and Ahmed Basabrain at the University of Massachusetts Amherst, MA, USA Synthesis of 3-NitrophthalhydrazideExpand In this lab, you'll synthesize 3-aminophthalhydrazide, which is also called luminol, in a 2-step process. The first step is a condensation reaction between 3-nitrophthalic acid and hydrazine. During this step, the carboxylic acid groups are substituted with NH groups to produce 3-nitrophthalhydrazide and two water molecules. You must work in a fume hood...
04:36
Synthesis of Luminol - Instructor Prep
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2020
Source: Lara Al Hariri at the University of Massachusetts Amherst, MA, USA Preparation of SolutionsExpand Here, we show the laboratory preparation for 10 students working in pairs, with some excess. Please adjust quantities as needed. Before you get started, put on a lab coat, splash-proof safety glasses, and nitrile gloves. The chemicals that you will use are hazardous, so both solutions must be prepared and handled in a fume hood. Prepare 10 mL of a 10% by volume solution of...
04:25
Endotoxin Activity Assay: A Chemiluminescence-Based Bioassay for Investigating Endotoxin Activity in Blood Sample
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2025
This video demonstrates a rapid bioassay for investigating endotoxin activity in a whole blood sample via a chemiluminescence-based method. This assay is a rapid and sensitive biomarker test for early-stage diagnosis of endotoxin-mediated sepsis.
02:58
An Assay to Detect Oxidative Burst in Arabidopsis Leaf Discs upon Immune Elicitation
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2025
This video demonstrates an assay to measure oxidative burst in Arabidopsis leaves upon immune elicitation. Leaf discs, cut from plant leaves, are incubated with bacterial peptides functioning as microbe-associated molecular patterns or MAMPs. Upon detection of the MAMPs, plant cells induce the production of extracellular ROS, which is detected using a chemiluminescence assay.
FAQs
In this reaction, hydrogen peroxide supplies oxidizing conditions, while horseradish peroxidase acts as the catalyst that promotes luminol oxidation. The resulting excited product releases measurable light. Changing the amount of target or reaction activity can therefore alter signal intensity, allowing the assay to connect a chemical event with a quantitative optical readout.
Signal intensity provides an indication of how much target or reaction activity is present, because the measured light is related to that amount. Its broad dynamic range supports measurements across differing signal levels rather than restricting analysis to a narrow interval. This is useful for quantitative comparison in immune response and infection studies.
Luminol oxidation links reactive oxygen species analysis to a measurable light signal. In applications that examine these species, the assay uses its light-generating reaction to quantify associated chemical activity. This capability extends its immunological relevance beyond antibody or antigen detection, supporting investigations of oxidative activity during infection-related research.
A typical workflow combines luminol with hydrogen peroxide and horseradish peroxidase, then measures the emitted light. The peroxide and catalyst establish the reaction conditions, while the optical measurement supplies the assay readout. In immunological experiments, the target may be an antibody, microbial antigen, or inflammatory marker, supporting sensitive quantitative analysis.
Luminol-based assays can support detection of antibodies, microbial antigens, inflammatory markers, and reactive oxygen species. These targets connect the method to both host-response measurements and pathogen-related investigation. The same light-based readout can therefore be applied to different questions, including immune activation, microbial presence, and chemical activity associated with infection.
Within Immunology and Infection, the method supports diagnostics, pathogen studies, and quantitative analysis of immune responses. Its broad dynamic range helps accommodate differing signal levels, while compatibility with automated instruments facilitates instrument-based measurement. Together, these features make it relevant for studying microbial targets, inflammatory responses, and immune-associated chemical activity.