Spin Trapping Spectroscopy
Spin Trapping Spectroscopy - Related Videos
13:21
Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
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Cited by 40 •
2012
Electron paramagnetic resonance (EPR) spectroscopy was employed to detect nitric oxide from bovine aortic endothelial cells and superoxide radical anion from human neutrophils using iron (II)-N-methyl-D-glucamine dithiocarbamate, Fe(MGD)2 and 5,5-dimethyl-1-pyroroline-N-oxide, DMPO, respectively.
01:08
NMR Spectroscopy: Spin–Spin Coupling
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2024
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...
07:33
Magnetic Resonance Spectroscopy of live Drosophila melanogaster using Magic Angle Spinning
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Cited by 5 •
2010
This technique enables the use of high-resolution magic angle spinning proton MR spectroscopy (HRMAS 1H-MRS) for molecular characterization of live Drosophila melanogaster with a conventional 14.1 tesla spectrometer equipped with an HRMAS probe.
08:03
Study of Protein Dynamics via Neutron Spin Echo Spectroscopy
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Cited by 4 •
2022
The present protocol describes methods for investigating the structure and dynamics of two model proteins that have an important role in human health. The technique combines bench-top biophysical characterization with neutron spin echo spectroscopy to access the dynamics at time and length scales relevant for protein interdomain motions.
13:39
Optical Trapping of Nanoparticles
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Cited by 7 •
2013
The following setup approach details low power optical trapping of dielectric nanoparticles using a double-nanohole in metal film.
FAQs
The spin-trapping agent converts an unstable free radical into a longer-lived paramagnetic radical adduct. This transformation makes the reactive species more amenable to examination by electron paramagnetic resonance. Rather than attempting to measure the original radical while it exists briefly, researchers analyze the adduct’s characteristic spectrum to obtain information about the species formed during the process.
The radical adduct produced during spin trapping has a characteristic electron paramagnetic resonance spectrum. Interpreting that spectral pattern provides evidence about the unstable radical that reacted with the trapping agent. The approach therefore links a measurable paramagnetic signal to an otherwise difficult-to-observe chemical species, helping researchers investigate oxidative processes in biological and engineered systems.
Short-lived free radicals can be difficult to measure directly because they do not remain available for observation. Spin trapping addresses this limitation by producing a more persistent paramagnetic adduct before spectral analysis. The extended lifetime supports detection and characterization of reactive species, making the technique useful when transient chemistry must be examined within a complex biological or engineered environment.
In bioengineering research, the method can help characterize reactive oxygen and reactive nitrogen species generated by enzymes, cells, biomaterials, or device-related processes. Examining these species connects radical formation with oxidative activity in the system under study. This information can support investigations of cellular stress, material compatibility, tissue engineering, and engineered systems designed for controlled redox behavior.
A typical experiment begins by allowing a spin-trapping agent to react with an unstable radical. The reaction forms a longer-lived paramagnetic radical adduct, which is then examined using electron paramagnetic resonance. Researchers use the resulting characteristic spectrum to obtain information about the original radical and relate its formation to the biological or engineered process being investigated.
Bioengineers may choose Spin Trapping Spectroscopy when the species of interest is too short-lived for straightforward direct measurement. Its value extends across systems where radicals arise from enzymes, cells, biomaterials, or devices. By making transient reactivity detectable through an adduct spectrum, the method helps evaluate oxidative processes and redox behavior in engineered environments.
Measurements can help identify reactive oxygen and nitrogen species associated with cellular stress, biomaterial behavior, tissue-engineering environments, or device-related processes. These observations provide a way to examine material compatibility and oxidative activity rather than relying only on system-level outcomes. The resulting information can also guide the design of systems intended to maintain controlled redox behavior.