| 单词 | covalent bond |
| 释义 | covalent bond noun[C] chemistryspecializeduk/kəʊˌveɪ.lənt ˈbɒnd/us/koʊˌveɪ.lənt ˈbɑːnd/achemicalbondin which twoatomsshareone or morepairsofelectronsthatholdthem together 共价键（原子间共享电子而形成的化学键）Cells
covalent bond| American Dictionarycovalent bond noun[C] us/koʊˈveɪ·lənt ˈbɑnd/achemicalbond in which twoatomsshareone or morepairsofelectrons, whichholdthem together Examplesofcovalent bondcovalent bond This structure is unique in enzymes in that the two ends are the only form ofcovalentbondattachment to rest of the protein. From theCambridge English Corpus Thereafter, b-ionone freely exchanged within the binding pocket during perfusion because the truncated retinoid cannot form acovalentbondwith opsin. From theCambridge English Corpus The mechanism of the attractive force in acovalentbondrelies on highly complex electromagnetic interactions between electrons with magnetic spin components. From theCambridge English Corpus This is of course equivalent to saying that as acovalentbondbegins to form between the phosphorus and the 2h-oxygen, the burden of the negative charge becomes relieved. From theCambridge English Corpus This type of chemical bond is either a non-polarcovalentbondor a polarcovalentbond. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.As such, the chemical linkage (usually acovalentbond) should be subjectable to biodegradation, such as hydrolysis, by an enzymatic or non-enzymatic mechanism. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.What makes the isopeptag different from other peptide tags is that it can bind its binding protein through a permanent and irreversiblecovalentbond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.If the unpaired electrons can spin-pair to form acovalentbond, then the covalent bonding interaction can lower the energy of the charge transfer state. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.They are not full charges because the electrons are still shared through acovalentbondbetween the oxygen and carbon. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.While traditional chemistry focuses on thecovalentbond, supramolecular chemistry examines the weaker and reversible noncovalent interactions between molecules. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.This new peptide tag can allow scientists to target and isolate their proteins of interest through a permanentcovalentbond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These products incorporate a unique synthetic bioadhesive that forms acovalentbondwith tissue proteins enabling adhesion to internal organs and achieving a sealing effect. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Photochemical routes to oxyallyl cations generally result in the formation of a newcovalentbondbefore the cycloaddition itself takes place. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Secondly, since there is nocovalentbond, various indicators can be used with the same receptor. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.To uncage molecules, a photolysis system is required to cleave thecovalentbond. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.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. |
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