nuclear magnetic resonance
C2Academic, Scientific, Technical, Medical
Definition
Meaning
A physical phenomenon in which atomic nuclei absorb and re-emit electromagnetic radiation in a magnetic field.
The phenomenon serves as the fundamental principle for a range of techniques, most notably NMR spectroscopy and magnetic resonance imaging (MRI), used to analyze the molecular structure of substances and to create detailed images of the body's internal structures.
Linguistics
Semantic Notes
A compound noun referring to both a physical phenomenon and the analytical techniques based on it. In common usage, often shortened to its acronym 'NMR' or, in medical contexts, to the related term 'MRI'.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Pronunciation of 'nuclear' varies.
Connotations
Identical technical connotations. 'MRI' is the overwhelmingly preferred public-facing term for medical imaging in both regions.
Frequency
Equally high frequency in relevant technical fields in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
NMR is used to [VERB]...Researchers performed NMR on [NOUN PHRASE].The [NOUN] was analysed by NMR.The NMR [VERB] revealed...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Rare, except in contexts of selling or developing scientific/medical instrumentation.
Academic
Ubiquitous in chemistry, biochemistry, physics, and materials science papers. Standard term.
Everyday
Virtually non-existent; 'MRI scan' is the common term for the medical application.
Technical
The fundamental term for the phenomenon and core analytical method in laboratory science.
Examples
By Part of Speech
verb
British English
- The compound was NMR'd to confirm its purity.
- We need to NMR this sample before proceeding.
American English
- The sample was NMR'd for structural analysis.
- Let's NMR the final product to verify the structure.
adverb
British English
- The sample was analysed NMR-spectroscopically.
- The results were determined NMR-quickly.
American English
- The structure was solved NMR-spectroscopically.
- They characterised the material NMR-rapidly.
adjective
British English
- The NMR spectrometer required cryogenic cooling.
- They published the NMR spectral data in the supplement.
American English
- The NMR facility is located in the new science building.
- Her research relies on NMR spectroscopic techniques.
Examples
By CEFR Level
- The doctor sent her for an MRI scan, which uses nuclear magnetic resonance.
- Scientists have powerful machines to study molecules.
- Nuclear magnetic resonance, or NMR, is a key technique for determining the structure of organic compounds.
- MRI scanners utilise the principles of nuclear magnetic resonance to produce detailed images of soft tissues.
- The research team employed two-dimensional nuclear magnetic resonance spectroscopy to elucidate the protein's folding dynamics in solution.
- Advances in superconducting magnet technology have dramatically increased the sensitivity and resolution of modern NMR spectrometers.
Learning
Memory Aids
Mnemonic
Nuclei (like tiny magnets) Resonate (respond) in a Magnetic field - NMR.
Conceptual Metaphor
A radio station for atoms: The magnetic field tunes the nucleus to a specific frequency, which then broadcasts information about its molecular environment.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'nuclear' here as 'ядерный' in the sense of 'atomic weaponry'. The correct scientific translation is 'ядерный магнитный резонанс' (ЯМР), though the weaponry connotation can cause confusion for the uninitiated.
- The acronym 'NMR' (эн-эм-ар) is commonly used in Russian scientific speech, similar to English.
Common Mistakes
- Mispronouncing 'nuclear' as 'nuke-you-ler'. The standard pronunciation follows 'clear'.
- Confusing NMR (the general phenomenon/spectroscopy) with MRI (the specific medical imaging application). All MRI is based on NMR, but not all NMR is MRI.
- Incorrect hyphenation or word order, e.g., 'magnetic-nuclear resonance'.
Practice
Quiz
What is the most common everyday term for the medical imaging application of nuclear magnetic resonance?
FAQ
Frequently Asked Questions
MRI (Magnetic Resonance Imaging) is a medical imaging application *based on* the physical phenomenon of nuclear magnetic resonance. 'NMR' is the broader term for the phenomenon and its use in laboratory spectroscopy.
The 'nuclear' refers to the atomic nucleus (the core of the atom), which acts like a tiny magnet. It does not refer to nuclear energy or radiation; the process is non-ionising and safe for medical use.
It is a cornerstone technique in chemistry (especially organic and analytical), biochemistry, structural biology, pharmacology, and materials science. Its medical counterpart, MRI, is used in radiology and clinical diagnostics.
An NMR spectrum is a graph showing the resonant frequencies of atomic nuclei in a molecule. The positions, intensities, and splitting patterns of the peaks provide detailed information about the molecule's structure, dynamics, and chemical environment.