| Topic: |
Science > Physics |
| User: |
"Art Ickles" |
| Date: |
20 Apr 2006 12:41:18 PM |
| Object: |
Re: silanate? |
http://www.mediref.info/Category_Details.aspx?Cat_ID=64: $
Silicon $
Silicon (Si) is present in biologic material as a silanate,
[...]
The word "silanate" does *not* refer to a chemical species.
I agree that it's a poor choice of word in the mediref article and
the original post. Like-minded individuals discussing a topic with
which they were already familiar could probably agree that "silanate"
could be a SILANol salt, ether or ester (ATE) = silanate, perhaps better
and more common as silanolate. But that doesn't make it official,
universal or correct. (Eric Lucas has just posted a similar comment
about silanate and its ambiguity.)
Since usenet isn't exactly a bunch of like-minded individuals (do we
all agree on that?), I think less ambiguous terminology would be preferred.
I don't think there's much biological silicon in the human body,
There isn't much Si but it's there: google "speciation silicon human" or
related terms. Everyone is exposed to Si by dietary means (naturally
occurring in water, foods). It is taken up from the gut and distributes
to the blood and is sometimes found in other organs. The studies tend
to involve very small quantities of Si being widely distributed and cannot
account for 100% of the Si. It's also hard to get a volunteer to ingest
labled Si and then allow their brain or liver to be ground up and analyzed.
Some workers in industry (or labs) are exposed to Si by inhalation. Some
develop silicosis or "white lung" (the silicon version of coal miners black lung).
In humans, Si appears to have an affect on the synthesis of bone and collagen
but there does not appear to be any proven ESSENTIAL role for Si as yet.
As of about 10 years ago, there was no evidence that there are any mammalian
enzymes that can process Si or organosilanes at Si. I'm assuming that that
hasn't changed. In plant biology, Si is more important and there are Si
transporters and what-not.
--
Sent by xanadoof from yahoo element from com
This is a spam protected message. Please answer with reference header.
Posted via http://www.usenet-replayer.com
.
|
|
|
Related Articles |
|
|
