Wedge Shaped Cells
Wedge Shaped Cells - Related Videos
01:24
Wedges
0 Views •
2025
A wedge is a simple machine that serves various purposes, such as adjusting the elevation of structural or mechanical parts, providing stability for heavy objects, and splitting a body into two parts. This versatile tool can amplify an applied force, making it easier to manipulate large or heavy objects. Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
06:33
Preparing Wedge Brain Slices to Visualize Auditory Neurons
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2025
This video demonstrates the process of preparing wedge-shaped brain slices in a laboratory setting. Using a vibratome, a wedge-shaped slice from a mouse's brain is crafted with varying thickness. This slice contains the auditory nerve root positioned on the thicker end, while the hearing-related neurons are located on the thinner end.
02:59
Auditory Nerve Root Stimulation and Postsynaptic Current Recordings in a Mouse Brain Wedge Slice
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2025
This video demonstrates a protocol for stimulating the auditory nerve root and recording postsynaptic currents in medial olivocochlear neurons in mouse brain wedge slices.
11:20
Imaging Cell Shape Change in Living Drosophila Embryos
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Cited by 23 •
2011
Early development of the fruit fly, Drosophila melanogaster, is characterized by a number of cell shape changes that are well suited for imaging approaches. This article will describe basic tools and methods required for live confocal imaging of Drosophila embryos, and will focus on a cell shape change called cellularization.
10:53
Shape Memory Polymers for Active Cell Culture
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Cited by 25 •
2011
A method for developing cell culture substrates with the ability to change topography during culture is described. The method makes use of smart materials known as shape memory polymers that have the ability to memorize a permanent shape. This concept is adaptable to a wide range of materials and applications.
FAQs
The Beer–Lambert law connects the measured absorbance with three relevant quantities: optical path length, concentration, and molar absorptivity. Because the cell presents different path lengths, absorbance can be examined as the light-travel distance changes while the sample and compound remain the same. This relationship allows measurements to reveal how strongly a chemical species absorbs light.
The angled windows create a continuously changing distance through which light travels in the sample. Consequently, different regions of the same cell provide different optical conditions rather than one fixed path length. This gradual variation makes it possible to study how the analytical signal responds to thickness and to use path-length changes when interpreting spectrophotometric measurements.
A fixed-path cuvette provides one defined sample thickness, whereas a wedge-shaped cell supplies a range of path lengths within one holder. That distinction is useful when a single fixed path does not provide an ideal absorbance measurement. It also allows researchers to investigate path-length effects directly instead of comparing separate cells with different designs.
Researchers can measure absorbance at multiple effective path lengths and interpret those values with the Beer–Lambert law. When concentration is considered alongside the path-length variation, the measurements support determination of the compound’s molar absorptivity, also called its extinction coefficient. Using one variable-path cell helps link the optical signal to thickness systematically.
The sample is placed in the optical holder, and spectrophotometric readings are collected under the available path-length conditions. The resulting absorbance values can then be compared with the corresponding changes in light-travel distance. This workflow supports calibration, characterization of absorbing compounds, and evaluation of how optical path length influences the analytical signal.
It is useful when a sample’s absorbance falls outside the ideal range available from a fixed-path cuvette. The variable path length provides alternative optical distances within the same cell, allowing the measurement to be examined under a more suitable thickness. This expands the practical range of spectrophotometric analysis without requiring a separate fixed-path design for every condition.
Measurements can support extinction-coefficient determination, characterization of absorbing compounds, and calibration of spectrophotometric responses. They can also show how changing optical path length affects the analytical signal. In chemistry research, these outcomes help connect observed absorbance with sample thickness and concentration while providing a systematic basis for interpreting optical measurements.