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Isotope

Isotope

(Science: radiobiology) One of several nuclides having the same number of protons in their nuclei and hence having the same atomic number, but differing in the number of neutrons and therefore, in the mass number. Almost identical chemical properties exist between isotopes of a particular element. The use of this term as a synonym for nuclide is to be discouraged.


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Re: Molecular gene (genome) concept scientifically untenable

... one example of a chemical structure losing its properties when the structure is intact?” Since you’re a chemist, you surely know about the kinetic isotope effect. Nuclear decay will change the properties of a molecule, without changing chemical structure.” Dear AstraSequi, you are misleading people ...

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by PAWahid
Sat May 12, 2012 2:29 am
 
Forum: Molecular Biology
Topic: Molecular gene (genome) concept scientifically untenable
Replies: 12
Views: 11392

Re: Molecular gene (genome) concept scientifically untenable

... one example of a chemical structure losing its properties when the structure is intact? Since you’re a chemist, you surely know about the kinetic isotope effect. Nuclear decay will change the properties of a molecule, without changing chemical structure. But regardless, that is not what you said ...

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by AstraSequi
Fri May 11, 2012 9:31 am
 
Forum: Molecular Biology
Topic: Molecular gene (genome) concept scientifically untenable
Replies: 12
Views: 11392

Re:

... of most datation based on radioactive decay is already quite large due to other variable factor (including the exact proportion of the measured isotope at the time of formation of the experimental subject), and there is no way from what I read here to assess if that variation is going to change ...

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by Zenithar66
Thu Apr 07, 2011 1:11 am
 
Forum: Evolution
Topic: 5 best proofs of evolution
Replies: 175
Views: 172263

5 best proofs of evolution

... of most datation based on radioactive decay is already quite large due to other variable factor (including the exact proportion of the measured isotope at the time of formation of the experimental subject), and there is no way from what I read here to assess if that variation is going to change ...

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by canalon
Wed Apr 06, 2011 9:51 pm
 
Forum: Evolution
Topic: 5 best proofs of evolution
Replies: 175
Views: 172263

AIDS – a tritium disease?

From the research I have done on the web, since there is no mention of tritium in my text books, all I can work out is it's a rather rare isotope of hydrogen that is more often than not made by UV light reacting with the atmosphere. This event in itself is incredibly rare, and the tritium emits ...

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by MillieKittan
Wed Mar 02, 2011 7:33 pm
 
Forum: Human Biology
Topic: AIDS – a tritium disease?
Replies: 23
Views: 9194
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