Viral Titration
Viral Titration - Related Videos
10:17
Introduction to Titration
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2023
Source: Laboratory of Dr. Yee Nee Tan — Agency for Science, Technology, and Research Titration is a common technique used to quantitatively determine the unknown concentration of an identified analyte.1-4 It is also called volumetric analysis, as the measurement of volumes is critical in titration. There are many types of titrations based on the types of reactions they exploit. The most common types are acid-base titrations and redox titrations.5-11 In a typical titration process, a standard...
06:58
n-Butyllithium Titration
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2023
Source: Vy M. Dong and Diane Le, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate a simple technique to titrate and obtain an accurate concentration of the organolithium reagent, n-butyllithium (n-BuLi). Organolithium reagents are extremely air- and moisture-sensitive and proper care must be taken to maintain the quality of the reagent so that it may be used successfully in a reaction. The n-BuLi titration experiments should be performed regularly...
02:08
Titration of a Polyprotic Acid
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2020
A polyprotic acid contains more than one ionizable hydrogen and undergoes a stepwise ionization process. If the acid dissociation constants of the ionizable protons differ sufficiently from each other, then the titration curve for such polyprotic acid generates a distinct equivalence point for each of its ionizable hydrogens. Therefore, titration of a diprotic acid results in the formation of two equivalence points, whereas the titration of a triprotic acid results in the formation of three...
02:23
Acid-Base Titration Curves
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2020
A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid. For a titration carried out for 25.00 mL of 0.100...
12:00
Titration of Human Coronaviruses Using an Immunoperoxidase Assay
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Cited by 14 •
2008
In this video, we demonstrate an alternative method for detection and titering of viruses using an enzymatic antigen detection technique known as an immunoperoxidase assay. Here, we will show you how to collect your viral samples, prepare the cells for testing, and finally the immunoperoxidase assay using serial dilutions to determine the viral titer.
FAQs
Serial dilutions create a set of related test samples rather than relying on one concentrated preparation. Each dilution is applied to susceptible cells, allowing the resulting infection signal to be compared across sample concentrations. This design helps connect observed plaques, cytopathic effects, or other assay signals to the amount of infectious virus and supports a reproducible concentration estimate.
Susceptible cells provide the biological system in which infectious virus can be detected. If the sample produces plaques, cytopathic effects, or another measurable signal in those cells, the assay records evidence of infection. Their use makes the measurement relevant to infectivity and to experiments examining interactions between viruses and host cells.
The reporting format reflects the assay signal used to quantify infection. Plaque-forming units are associated with visible plaques, whereas tissue culture infectious dose is another way to express the infectious concentration measured in cell culture. Keeping the reporting approach clear helps investigators compare results appropriately when evaluating replication, treatments, vaccines, or prepared reagents.
Reliability depends on obtaining a consistent estimate of infectious virus from the sample and using that estimate to standardize experimental infections. Consistent titers reduce variation in the amount of virus introduced into virus-host cell studies. As a result, experiments become easier to compare and reproduce, whether they examine replication, antiviral treatments, vaccines, or prepared reagents.
Before an experimental infection, a measured titer allows researchers to use a defined infectious-virus concentration rather than an unquantified sample. This supports consistent exposure of host cells across experiments. Standardization is particularly important when comparing viral replication or assessing an antiviral treatment or vaccine, because differences in the starting amount of virus could otherwise affect interpretation.
The method supports evaluation of antiviral treatments and vaccines, characterization of viral replication, and preparation of consistent reagents. In each case, the measurement provides a common way to describe the infectious input or preparation used in the study. That shared reference improves comparison among experiments and helps researchers interpret differences in experimental outcomes.
Because the assay exposes susceptible cells to sample dilutions, its outcome links the virus preparation to a detectable response in a host-cell system. Plaques, cytopathic effects, or other signals provide experimental evidence of infection. This connection makes titration useful for studying viral replication while providing a practical basis for comparing how different preparations affect cells.