Structural Characterization Methods
Structural Characterization Methods - Related Videos
10:24
A Method for Characterizing Embryogenesis in Arabidopsis
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Cited by 11 •
2017
This protocol outlines a method for observing embryogenesis in Arabidopsis via ovule clearance followed by the inspection of embryo pattern formation under a microscope.
09:21
Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity
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Cited by 5 •
2015
Biofilms have complex interactions with their surrounding environment. To comprehensively investigate biofilm-environment interactions, we present here a series of methods to create heterogeneous chemical environment for biofilm development, to quantify local flow velocity, and to analyze mass transport in and around biofilm colonies.
07:15
A Novel Method for In Situ Electromechanical Characterization of Nanoscale Specimens
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Cited by 2 •
2017
Isolating electrical and thermal effects on electrically assisted deformation (EAD) is very difficult using macroscopic samples. Metallic sample micro- and nanostructures together with a custom test procedure have been developed to evaluate the impact of applied current on the formation without joule heating and evolution of dislocations on these samples.
08:54
An Immunofluorescent Method for Characterization of Barrett’s Esophagus Cells
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2014
There is a discernible need for improved information on molecular drivers of Barrett’s Esophagus. Immunofluorescent staining is a useful technique for understanding the effects of cell signaling on cell morphology. We present a simple, effective protocol for the use of immunofluorescent staining to assess therapeutic treatment in Barrett’s Esophagus cells.
08:19
A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse
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Cited by 1 •
2022
This article details murine congenital heart disease (CHD) diagnostic methods using fetal echocardiography, necropsy, and Episcopic fluorescence image capture (EFIC) using Episcopic confocal microscopy (ECM) followed by three-dimensional (3D) reconstruction.
FAQs
The measured signal is interpreted according to the interaction that produced it. Infrared responses indicate functional groups, nuclear magnetic resonance signals help establish connectivity, X-ray diffraction locates atoms in a crystal, and mass spectrometry supplies molecular-mass information. Because each measurement emphasizes a different structural feature, interpretation converts experimental patterns into constraints on a proposed chemical structure.
Complementary methods reduce the risk of assigning a structure from incomplete evidence. A mass measurement can support a molecular-mass assignment, while infrared data test for functional groups and nuclear magnetic resonance examines connectivity. X-ray crystallography adds atomic positions when applicable. Agreement among these independent observations strengthens identification and helps distinguish isomers.
The desired structural information guides method selection. If the main issue is functional-group identification, infrared measurements are relevant; connectivity calls for nuclear magnetic resonance; atomic positions call for crystallography; and molecular mass calls for mass spectrometry. Choosing by the information required prevents a single measurement from being treated as sufficient evidence for every structural question.
These methods differ in both the probe and the structural result. Infrared and nuclear magnetic resonance use electromagnetic radiation, whereas crystallography uses X-rays and mass spectrometry examines ions. Their outputs are therefore not interchangeable: one emphasizes functional groups, another connectivity, another atomic positions, and another molecular mass. This distinction supports integrated structural interpretation.
A practical workflow begins by identifying what must be established about the substance, such as functional groups, connectivity, atomic arrangement, or molecular mass. Researchers then select measurements that address those features and compare the resulting signals with the proposed structure. Using several methods to validate one reaction product or unknown compound provides a more defensible assignment than relying on one result.
In drug development, materials research, catalysis, and quality control, these methods help verify what was made and assess whether its structure matches the intended material. Structural evidence can also connect molecular arrangement with observed properties. In chemistry workflows, that makes the methods useful for unknown compounds as well as for validating products and supporting the reliability of prepared substances.