You may find the following link useful:
http://niremf.ifac.cnr.it/docs/DIELECTRIC/AppendixC.html
There is a great deal of data on the electrical properties of tissues
at radio frequencies.
You have an interesting idea but I think it will be a challenge in
live animals. You will be looking for subtle changes in the absorption
spectrum and having to remove lots of other effects from your
measurements. One of the biggest is the breathing of your test animal.
The amount of air in its lungs varies the radio absorption.
How deep are the tissues you want to study? You may have more luck
doing near field measurement close to the surface but repeatability
will be an interesting challenge.
Chris.
On Jan 3, 3:55 am, Veera <drveera...@gmail.com> wrote:
> Oh my GOD such a small spark is bringing so many ideas and
> suggestions...
> I feel very happy to so many responses to my query...
> Really this group is very powerful...
> i really believe that miracles happen when may brains combine...
> Thank you everyone for your useful suggestions....
>
> On Jan 3, 6:30 am, CoryG <c...@geesaman.com> wrote:
>
> > If you are looking at imaging methods, I'd suggest pursuing phased
> > arrays. You can get sub-wavelength resolution out of the phasing and
> > depending how it's made (freq-phasing, phase-angle phasing, amplitude
> > phasing, etc) can get the ability to view/control variable size
> > objects instead of having to focus on a single target molecule.
> > Phased arrays are going to be huge when they are properly utilized
> > within the medical industry (with what would probably be a
> > supercomputer today running one) - but there seems to be little work
> > on it at the moment, you can definitely see the start in dumb-rf (for
> > lack of a better term) forms of cancer treatment utilizing metallic
> > nano-particles and what is more or less an induction coil to burn out
> > the cells. With enough precision (ie: more nodes, more computing
> > power, vastly greater cost) you could image and manipulate living
> > cells in real time (conductivity of ion pathways, affinity for
> > particular chemical reactions in a region, heating/cooling, etc). Of
> > course, if you are trying to get something done with it in the
> > immediate future, phased arrays probably aren't the way to go - I
> > started on one about a year ago and got side tracked on building new
> > super-capacitors (having done so because I found a way to make better
> > ones while trying to cut the costs of a 210KVA power supply to wellunder the $10-$15k it would cost just in iron if I were to hand-make
> > the transformers). In a DIY sense, there's a lot to be done to get
> > phased arrays into an attainable realm, mainly in power supplies and
> > broadband phase-shifters (everything else is relatively cheap per
> > component, but increases in cost with the number of nodes). Didn't
> > mean to get too off-topic here, but RF is a pretty cool subject - it's
> > kind of sad the greatest modern use of it is in telecommunication.
>
> > On Jan 2, 6:55 pm, Nathan McCorkle <nmz...@gmail.com> wrote:
>
> > > On Mon, Jan 2, 2012 at 6:38 PM, John Griessen <j...@industromatic.com> wrote:
> > > > On 01/02/2012 12:41 PM, Simon Quellen Field wrote:
>
> > > >> Suppose we made a strongly polar molecule that was fairly large in
> > > >> comparison
> > > >> to other strongly polarized molecules in the body (a small peptide is
> > > >> large in
> > > >> comparison to water, for example). We build it so that it changes its
> > > >> length in
> > > >> response to something we want to measure (some gene expression or siRNA,
> > > >> or
> > > >> maybe just oxygen levels). Now it will resonate at a different radio
> > > >> frequency
> > > >> when the levels of that target change.
>
> > > >> We already do this with light. An acid-base indicator is a large molecule
> > > >> that
> > > >> resonates at a particular frequency (say that of blue light) in a basic
> > > >> solution,
> > > >> but resonates at a different frequency (red light) in an acid. Making the
> > > >> molecule
> > > >> larger shifts the frequency lower
>
> > > > Good thinking Simon. Like it. Would be nice to open hardware something
> > > > like that
> > > > because it is the classic instrument that makes something invisible become
> > > > visible.
>
> > > > And it seems novel to me...
>
> > > We may have touched on this before, but this seems very close to
> > > bio-telecommunication...
>
> > > > --
> > > > You received this message because you are subscribed to the Google Groups
> > > > "DIYbio" group.
> > > > To post to this group, send email to diybio@googlegroups.com.
> > > > To unsubscribe from this group, send email to
> > > > diybio+unsubscribe@googlegroups.com.
> > > > For more options, visit this group at
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>
> > > --
> > > Nathan McCorkle
> > > Rochester Institute of Technology
> > > College of Science, Biotechnology/Bioinformatics
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