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单词 free radical
释义
free radical
noun[Coften plural]
chemistryspecialized
uk
/ˌfriː ˈræd.ɪ.kəl/us
/ˌfriː ˈræd.ɪ.kəl/
amoleculethat has anextraelectronandthereforereactsveryeasilywith othermolecules:
自由基，游离基
Freeradicalshave beenimplicatedincancerand many otherseriousdiseases.游离基是罹患癌症和许多其他严重疾病的潜在原因之一。
SMART Vocabulary: related words and phrases
Physics: atoms, molecules & sub-atomic particles
  • acceptor
  • anion
  • anti-radical
  • antilepton
  • antimatter
  • antineutrino
  • elementary particle
  • hydroxyl ion
  • interatomic
  • interelectronic
  • interionic
  • intermolecular
  • intermolecularly
  • isotope
  • muon
  • neutrino
  • non-molecular
  • nucleon
  • nuclide
  • relative atomic mass
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(Definition offree radicalfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

Examplesoffree radical

free radical
Afreeradicalis a molecule with an unpaired electron.
From theCambridge English Corpus
Indirect evidence of increasedfreeradicalactivity (oxidative stress) may be obtained by measurement of antioxidant concentrations in all tissue and body fluids.
From theCambridge English Corpus
And finally a reperfusion injury characterized byfreeradicalformation and oxidative stress.
From theCambridge English Corpus
Thus, desiccation sensitivity may result from an inadequate provision offreeradicalscavenging mechanisms.
From theCambridge English Corpus
When afreeradicalreacts with a non-radical molecule a new radical is created, and consequently chain reactions are often initiated.
From theCambridge English Corpus
Freeradicalscavengers ameliorate the 2-cell block in mouse embryo culture.
From theCambridge English Corpus
The presence of thefreeradicalscavenging enzymes in parasitic organisms has been linked with immunomodulation.
From theCambridge English Corpus
They are knownfreeradicalscavengers and metal chelators.
From theCambridge English Corpus
Thefreeradicaltheory of aging : a critique.
From theCambridge English Corpus
During the hydrolysis again afreeradicalmechanism should be advocated for the reaction.
From theCambridge English Corpus
During rehydration, superoxide dismutase and glutathione reductase activities increased markedly, possibly affordingfreeradicalprotection until full hydration and metabolic recovery had occurred.
From theCambridge English Corpus
Possibly this is as a result offreeradicalformation.
From theCambridge English Corpus
Freeradicalactivity following contraction-induced injury to the extensor digitorum longus muscles of rats.
From theCambridge English Corpus
Ageing: a theory based onfreeradicaland radiation chemistry.
From theCambridge English Corpus
By a feedback mechanism on presynaptic auto-receptors, they reduce dopamine turnover and associatedfreeradicalproduction.
From theCambridge English Corpus
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
#https://dictionary.cambridge.org//dictionary/english/free-radical##
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更新时间：2025/9/27 8:20:57