User talk:Bedrupsbaneman

Welcome!

Hello, Bedrupsbaneman, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few good links for newcomers:

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Matani2005 18:49, 29 Mar 2005 (UTC)

Social responsibility[edit]

The fact that a dictionary article has been transferred out of the encyclopaedia and in to the dictionary doesn't mean that one has to submit encyclopaedia articles to the dictionary in future. I'm not going to transwiki the article back, especially since you are here to submit your own article yourself. Read the protection notice on the page and follow its instructions. Talk to an administrator about unprotecting the Wikipedia page (you can start with Mailer diablo, who protected it) and then submit your encyclopaedia article to Wikipedia. I've marked your encyclopaedia article for deletion on Wiktionary, in part because it's in the way of the dictionary article. Uncle G 21:34, 2005 Apr 3 (UTC)

Hi Bedrupsbaneman, Thanks for your message. As per request, Social responsibility has been unprotected, and reverse-tranwikifed. :) - Mailer Diablo 21:54, 3 Apr 2005 (UTC)

Hydroxylapatite[edit]

As a naive materials scientist, I'd like to ask exactly what crystalline structure of calcium phosphate is found in bone. This makes several links to the page incorrect, but I can help re-link those articles once I know what page they properly should link to. I suggest that a stub article on that material be started within the HA article, and moved to its own namespace if it grows large enough.--Joel 29 June 2005 03:33 (UTC)

Hi Joel Do you have access to elsevier journals? Then the reference (wopenka, 2005) in the article on hydroxylapatite should give you some starting points. From what I know the apatite in bone and teeth is not hydroxylapatite but rather carbonate or fluoride apatites. Also the bone and teeth apatites have mineral impurities. since bone and teeth are composites they include "a lot" of organic matter. furthermore the structure of enamel and dentine in teeth is slightly diffent giving them different mechanical properties.

with regards to calcium phosphate structure in bone, i have no idea. maybe the intial disorganised bone is CaP that later is transformed into apatite. Bedrupsbaneman 29 June 2005 15:29 (UTC)

I do in fact have access to Elsevier...I'll look into that. My understanding is that the order is actually imposed from the start by the binding proteins, which serve as nucleation templates and determine the final crystal structure. I'll look into it some other time; thanks for the info.--Joel 29 June 2005 17:44 (UTC)