Spectroscopic Abnormalities
Spectroscopic Abnormalities - Related Videos
02:23
Abnormal Proliferation
0 Views •
2021
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
02:23
Abnormal Proliferation
0 Views •
2023
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
10:51
Cardiac Exam III: Abnormal Heart Sounds
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2023
Source: Suneel Dhand, MD, Attending Physician, Internal Medicine, Beth Israel Deaconess Medical Center Having a fundamental understanding of normal heart sounds is the first step toward distinguishing the normal from the abnormal. Murmurs are sounds that represent turbulent and abnormal blood flow across a heart valve. They are caused either by stenosis (valve area too narrow) or regurgitation (backflow of blood across the valve) and are commonly heard as a "swishing" sound during auscultation.
06:38
Detection of Abnormal Prion Protein by Immunohistochemistry
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2023
Immunolabeling abnormal prion protein using immunohistochemistry protocols requires specific sample and anti-PrP antibody preparation methodologies. The present protocol describes the key steps in epitope demasking to ensure proper PrP immunolabeling and to minimize non-specific background staining. Also, this approach considers biosafety measures when conducting immunohistochemistry studies with the prion-infected tissues.
13:06
Visualization of miniSOG Tagged DNA Repair Proteins in Combination with Electron Spectroscopic Imaging (ESI)
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Cited by 12 •
2015
Electron spectroscopic imaging can image and distinguish nucleic acid from protein at nanometer resolution. It can be combined with the miniSOG system, which is able to specifically label tagged proteins in transmission electron microscopy samples. We illustrate the use of these technologies using double-strand break repair foci as an example.
FAQs
Concentration, chemical bonding, molecular conformation, and the surrounding environment can alter how molecular energy transitions interact with light. These changes may modify absorption, emission, or scattering behavior, producing a spectrum that differs from an expected profile. Examining which spectral features change helps connect an observed abnormality with possible compositional or structural variation in the material.
A shifted peak, altered intensity, broadened band, or additional signal does not by itself establish a single cause. Similar deviations may result from changes in composition, bonding, conformation, concentration, or environmental conditions. Comparing the abnormal spectrum with a validated reference profile provides a basis for separating genuine structural or compositional changes from process-related variation.
The relevant spectral behavior depends on whether the analysis examines absorption, emission, or scattering of light. An unexpected feature in one mode can reflect altered molecular energy transitions or changes in the material being measured. Keeping the measurement mode in view prevents researchers from treating every deviation as equivalent and supports more appropriate interpretation of structural or compositional changes.
Evaluation begins by comparing the measured spectrum with a validated reference profile representing the expected material or system. Investigators examine differences in peak positions, intensities, band widths, and signals that appear or disappear. The pattern of deviations can then indicate defects, contamination, disease-related alterations, or process variability, depending on the biological or engineered context.
A practical workflow is to obtain a spectrum from the biomaterial, reaction, cell, tissue, or engineered system, compare it with an appropriate validated profile, and characterize the observed deviations. Researchers then relate those changes to composition or structure and assess their significance for the system under study. This approach supports monitoring, characterization, and quality-control decisions.
Bioengineering applications include characterizing biomaterials, monitoring biochemical reactions, identifying changes in cells or tissues, and assessing engineered-system performance. Spectral comparisons can also help detect material defects, contamination, disease-related alterations, and variability introduced during processing. These uses make spectral analysis relevant both to biomedical investigation and to evaluating whether engineered products or systems perform consistently.