"Isosbestic" Pronounce,Meaning And Examples

"Isosbestic" Meaning

The term "isosbestic" refers to a point or range of points on a spectroscopic absorption or emission spectrum of a molecule or atom where the absorption or emission intensity is the same, regardless of the concentration of the substance. In other words, an isosbestic point is a spectral region where the absorbance or emission remains constant, regardless of changes in the concentration of the species being studied. This phenomenon is commonly observed in absorption spectroscopy, particularly in ultraviolet-visible (UV-Vis) and infrared (IR) spectroscopy.

"Isosbestic" Examples

Isosbestic

An isosbestic point is a point on the absorption spectrum of a molecule at which the absorption of light by the molecule is unaffected by changes in the environment or the presence of other substances. Here are 5 usage examples:

Example 1

The spectrophotometer was used to measure the absorbance of the protein at different wavelengths, noting that the isosbestic point occurred at 280 nm.

Example 2

The absorption spectra of the enzyme showed a characteristic isosbestic point at 380 nm, indicating a conformational change in the protein.

Example 3

Researchers used the isosbestic point to distinguish between the wild-type and mutated forms of the protein, as the mutated form showed a different absorption spectrum.

Example 4

The isosbestic point in the absorption spectrum of the haemoprotein was used to determine the reaction mechanism.

Example 5

The isosbestic point of the chromoprotein was recorded and found to be at 440 nm, a important feature in the study of protein structure and function.

Note: Isosbestic points are often used in biochemistry and biophysics to study protein conformation, reaction mechanisms, and enzyme activity.