Noun(1) one of two or more atoms with the same atomic number but with different numbers of neutrons
(1) some elements have only one stable isotope(2) Beta radiation is the emission of an electron from the nucleus of a radioactive isotope .(3) Based on changes in isotopic composition, individual amino acids could be roughly divided into three groups.(4) Consequently, white mica populations and even individual grains may represent compositionally and isotopically heterogeneous systems.(5) Ecologists see these isotopic ratios of carbon, hydrogen, oxygen, and nitrogen as signatures.(6) It is an excellent piece of work which considers loop and quasigroup identities that are invariant under isotopy , proving a number of very interesting results.(7) Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.(8) During subsequent logging, samples of core were selected for sectioning and for geochemical, mineralogical and isotopic analysis.(9) Likewise, isotopically substituted lipid membranes can be differentiated from protein adlayers and even each other with the proper selection of unique isotopic labels.(10) Winter and summer laminae differences are significant and are isotopically depleted with respect to water column organic carbon.(11) This points to a minor influence of diagenetic carbonate on the isotopic signal.(12) Radioactive elements have different isotopes that decay at different rates.(13) The nuclei of the hydrogen isotopes are the proton, the deuteron, and the triton.(14) With its origin in the local electron distribution, the chemical shift is a sensitive reporter of the chemical environment of isotopically labeled atoms.(15) During interglacial periods the ice caps melt and return the isotopically light water to the oceans, where it mixes rapidly.(16) Radiocarbon dating relies on the fact that carbon exists naturally in several isotopic forms.
Word Example from TV Shows
The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.
"What is the lightest element on Earth
with no stable ISOTOPE?"
The Big Bang Theory Season 1, Episode 13
English to Khmer Dictionary: isotope
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