Re: [Openeeg-list] A second look at HEG and near-infrared spectroscopy

[Phillip M. <phi...@sb...>]

I've worked with complex niobium HTSC SQUIDs for GHz ADCs
Don't be fooled by the "HIGH TEMPERATURE" super conductor label.
It is relative to 0K, and nitrogen liquefies in the temperature ranges =
thus described, NOT the high temperature people first think of.
Though such circuits can be handled with bare hands at room temperature =
(I have), they can't function unless cold enough to be super conductive.
http://www.google.com/search?hl=3Den&q=3DSQUID+HTSC
http://www.google.com/search?hl=3Den&q=3DSQUID+-HTSC+-web+-giant+-users+-=
http
http://www.google.com/search?hl=3Den&q=3DSQUID+-HTSC+operating+temperatur=
e
http://www.google.com/search?hl=3Den&q=3DSQUID+-HTSC+semiconductor+quantu=
m+unit+interference+device
http://www.google.com/search?hl=3Den&q=3DSQUID+-HTSC+ADC+GHz+semiconducto=
r+quantum+unit+interference+device
http://www.google.com/search?hl=3Den&q=3D%22room+temperature%22+supercond=
uctors
http://www.google.com/search?hl=3Den&q=3D%22Meissner+effect%22+supercondu=
ctors

Ammonia molecules give off radiation as described:
http://www.google.com/search?hl=3Den&sa=3DX&oi=3Dspell&resnum=3D0&ct=3Dre=
sult&cd=3D1&q=3Dammonia+GHz&spell=3D1

DMSO can be used to increase effective oxygenation:
http://www.google.com/search?hl=3Den&q=3DDMSO+oxygenation
and probably should be injected instead of adrenaline to preserve hearts =
paddled to death.
Since DMSO can keep extracted organs and limbs alive for hours, it =
should help unextracted organs last even longer.
http://www.google.com/search?hl=3Den&q=3DDMSO+transplant+transport

While it seems that oxygen could be sensed:
http://www.google.com/search?hl=3Den&q=3Doxygen+GHz
I would suspect that the characteristic energy wavelengths given off =
when oxygen combines with anything would be more qualitative, and better =
than quantitative.
http://www.google.com/search?hl=3Den&q=3Dchemical+combination+GHz
http://www.google.com/search?hl=3Den&q=3Dchemical+exothermic+GHz+radiatio=
n
The logarithmic amplitude modulation might not be too hard to detect, =
but the logarithmic frequency modulation might need SAWs and BAW =
correlators designed into the sensor system to discriminate the many =
probable similar effects in those angstrom ranges...

Measuring the oxygen in and comparing it to oxygen out is grossly useful =
for athletics.
But measuring and quadrangulating where and how fast oxygen combines and =
reacts with carbon and other chemicals might be very illuminating.

Of course, calcium waves...
http://www.google.com/search?hl=3Den&q=3Dcalcium+waves+glial+cells



----- Original Message -----=20
From: "Charl" <ti...@ho...>
To: <ope...@li...>
Sent: Tuesday, February 20, 2007 5:32 AM
Subject: [Openeeg-list] A second look at HEG and near-infrared =
spectroscopy


> Hello everyone,
>=20
> Like many before me, I have been brainstorming about making a neural=20
> interface with higher spatial resolution than EEG, and higher temporal =

> resolution than methods that look at brain oxygen levels (HEG, fMRI).=20
> Reading through the mailing list archives and various sites, it seems=20
> evident that using devices that are sensitive to magnetic fields (e.g. =

> SQUIDs) are not feasible for neural interfacing - at least in the near =

> future. Methods that look at oxygen levels in the blood are also not =
usable=20
> to achieve higher resolution, for obvious reasons.
>=20
> Reading about HEG has made me wonder - is it not possible to expand =
this=20
> technology to achieve the desired goal of higher resolution? Using=20
> near-infrared spectroscopy, it is possible to identify chemical =
substances=20
> by their response to light. Current HEG uses a fixed wavelength; I do =
not=20
> think it'll be very difficult to make a device which continuously =
"sweeps"=20
> its wavelength across a large enough spectrum. This light will not be=20
> targeted at hemoglobin, but at chemicals that are released during=20
> neurotransmission.
>=20
> Although I am quite adapt at electronics, I do not know a great deal =
about=20
> neurochemistry. Could someone (who considers him/herself an optimist,=20
> ideally ;) ) advise me on this matter?
>=20
> Kind regards,
> Charl
>=20
> _________________________________________________________________
> Play online games with your friends with Messenger=20
> http://www.join.msn.com/messenger/overview
>=20
>=20
> =
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