Odor Dilution
Odor Dilution - Related Videos
06:41
Testing for Odor Discrimination and Habituation in Mice
0 Views •
Cited by 66 •
2015
This manuscript describes a protocol to examine the olfactory system of rodents. The olfactory habituation/dishabituation test will allow investigators to determine whether a mouse habituates to a repeatedly presented odor and whether the mouse demonstrates dishabituation when presented a novel odor.
29:23
High-resolution Measurement of Odor-Driven Behavior in Drosophila Larvae
0 Views •
Cited by 24 •
2008
In this video article, we describe a new method allowing the construction of odorant gradients with stable and controllable geometries. We briefly illustrate how these gradients can be used to screen for olfactory defects (full and partial anosmia) and to study more subtle features of chemotaxis behavior.
08:50
Visually Mediated Odor Tracking During Flight in Drosophila
0 Views •
Cited by 8 •
2009
Here we describe how to optimize the acquired video image for an olfactory magnetic-tether (OMT) apparatus. We also describe two sample experimental protocols for studying visuo-olfactory fusion.
02:59
Solution Concentration and Dilution
0 Views •
2020
The relative amount of a given solution component is known as its concentration. Often, though not always, a solution contains one component with a concentration that is significantly greater than that of all other components. This component is called the solvent and may be viewed as the medium in which the other components are dispersed or dissolved. Solutions in which water is the solvent are, of course, very common on our planet. A solution in which water is the solvent is called an aqueous...
02:52
Real-Time Monitoring of Odorant Receptor Activation in Recombinant Cells
0 Views •
2025
Source: de March, C. A. et. al., Real-time In Vitro Monitoring of Odorant Receptor Activation by an Odorant in the Vapor Phase. J. Vis. Exp. (2019)This video demonstrates the method to monitor the real-time activation of odorant receptors in recombinant mammalian cells using luminescence measurement. Odorant binding triggers G-protein activation and cAMP production, activating glosensor proteins that emit luminescence upon substrate binding, providing a quantitative measure of receptor response.
FAQs
Serial dilutions create a graded sequence in which progressively fewer odorant molecules are available to stimulate olfactory receptors. Comparing responses across that sequence shows how detection changes as concentration falls. The point at which an individual no longer responds can be related to a sensory threshold, helping connect chemical availability with perceptual sensitivity.
Odor dilution can be used to examine both perceived intensity and whether an odor is detected at all. These outcomes provide different information: intensity describes how strongly a stimulus is experienced, whereas detectability concerns its presence above an individual’s sensory threshold. Separating them helps researchers interpret concentration-dependent sensory responses more precisely.
Varying odorant concentration allows researchers to test how animals respond when chemical cues become weaker. Changes in behavior can indicate how sensory systems support locating food, recognizing mates, avoiding threats, or reacting to environmental chemicals. This connects the concentration of an odorant with observable behavioral outcomes and, where measured, related neural responses.
An odor source is mixed with an odor-free solvent or carrier to reduce the amount of odorant presented in each dilution. The carrier provides the basis for preparing comparable samples while minimizing competing odors. Using a controlled dilution series lets researchers attribute differences in responses to changing odorant availability rather than an added background smell.
Researchers begin with an odor source and prepare successive mixtures by combining it with an odor-free solvent or carrier. Each dilution reduces the odorant concentration relative to the preceding sample. The resulting series is then presented for comparison, allowing responses to be recorded across concentrations and helping identify where detection or behavioral effects decline.
The method is useful when a study needs to compare animal responses across controlled odor concentrations. In behavioral assays, researchers can examine whether weaker or stronger samples alter actions associated with food, mates, threats, or environmental chemicals. Such comparisons help determine how concentration relates to behavior rather than relying on a single odor presentation.
Threshold testing uses progressively reduced odorant concentrations to identify the lowest level at which an individual can detect or respond to an odor. Researchers compare outcomes across the dilution series and relate the final detectable sample to sensory sensitivity. This provides a concentration-based measure that can support comparisons of olfactory responses in biological experiments.