Talk:Amino acid dating

Untitled

Yes, too technical, and jargon-filled, and written in the most obtuse style possible. This needs some serious edits - and the author has a tendancy to drop in and remove maintenance tags. Magichands 22:48, 20 March 2007 (UTC)

Needs to be broken into sections and have headings. RJFJR 20:34, 5 April 2007 (UTC)

I have tried to improve the article. I feel the context tag can now be removed. Does everyone agree? Please comment. I will try to improve the article further when i get the time. --Dhshah 18:19, 7 April 2007 (UTC)

changes

I originally wrote the article as an explanation to people involved in other dating methods, therefore with a science background . All statements are purposely general rather than specific, and hopefully unambiguous. No specific references are therefore included. Pictures would help but I have none. I added a list of web pages for further reading. I hope accessibility is not obtained at the cost of ambiguity. Bill B. Bill beauvais 20:52, 14 April 2007 (UTC)

Absolute or relative dating method?

I can find sources on either side. [1] says you can't use it for absolute dating. [2] says it's neither, but is a derivative method. [3] seems to describe it as an absolute dating method. And [4] again says it's a relative method. Doug Weller (talk) 18:48, 15 September 2008 (UTC)

"asymmetric" carbon atoms

I changed the expression " having an asymmetric carbon atom." to "having a stereocenter at their α-C atom". The reason is, that atoms are essentially spherically symmetric. Only their substitution pattern may exhibit asymmetry, otherwise molecules such as methane could also be asymmetric/chiral.
TCSH 132.187.199.137 (talk) 11:29, 22 July 2015 (UTC)

External links modified

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Merger proposal

The following discussion is closed. Please do not modify it. Subsequent comments should be made in a new section. A summary of the conclusions reached follows.

The result of this discussion was do not merge . - GA Melbourne (talk) 06:06, 26 December 2022 (UTC)

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All three of these articles appear to broadly overlap and involve the same topic. They all provide different sources of information and specifics on the topic. I think they would all be best combined into one larger article. I don't have enough bio knowledge to combine them properly. Herravondure (talk) 00:58, 26 May 2022 (UTC)

• Oppose as one is the natural occurrence of the stable isotopes. Another is the natural occurrence of unstable isotopes, and the last is artificial manipulation. Graeme Bartlett (talk) 00:04, 27 May 2022 (UTC)

• Question: what would be the title of the merged article? Is there a field in biochemistry that focuses on all amino acid isotope statistics? The void century (talk) 20:08, 26 July 2022 (UTC)

This is an extremely bad idea. Amino acid racemization dating does not depend on the isotopic composition at all. It involves a very slow chemical isomerization reaction from a left-handed isomer of a chiral molecule to a right-handed isomer of the same chiral molecule (or vice versa). These are unimolecular reactions with the same first-order kinetics as a radioactive isotope decay, but because they are chemical reactions, they can be influenced by the temperature history of the sample. The amino acid racemization dating method is useful because the half-lives of some amino acid racemization reactions fall into gaps between isotopic half lives. 184.96.143.55 (talk) 04:14, 14 November 2022 (UTC)

• Oppose None of the three articles have significant overlap. In addition to what the IP editor mentions on how amino acid racemization dating differs, SILAC is concerned with measuring relative abundance of proteins using "artificial" amino acids, while the last article is concerned with the natural occurrence of isotopes in amino acids (and how kinetic isotope effects can be exploited to map reaction networks of small molecules). Synpath (talk) 22:13, 21 November 2022 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.