"Jon Mcleod" wrote in message
m...
Richard Clark wrote:
On Fri, 05 Sep 2008 14:00:52 -0400, Jon Mcleod
wrote:
A few weeks ago, I asked about generating an 140kHz electric field
across a leaf, part of a bio-med lab. Thanks for the answers. But it
turns out I misread the roster and was in the wrong group.
What I ACTUALLY NEED to do is generate a 100kHz electric field, at
1v/cm, across a T-Bone steak, to measure whether it retards or
accelerates decomposition over time. The hypothesis is that the e-field
retards growth of certain bacteria inside the meat.
A pretty shabby hypothesis.
By design, we have not been instructed exactly how to construct the
methods and apparatus. I have at my disposal a function generator and
various amplifiers.
It is a gross oversimplification to just connect one wire to one end of
the steak, and another wire at the other end, and apply 20V RMS across a
20cm steak to generate 1V/cm?
Yes it is a gross oversimplification. What are your controls?
Thanks. Sorry about the idiot questions.
Hi Jon,
It has been historically proven that the e-fields of 60 Hz current
across the ribs of convicts, over time (about several minutes)
seriously accelerates decomposition. Sterilization would naturally
follow too answering the point about bacteria growth. Between those
two obvious observations, it would seem you have a conflicting agenda.
The hypothesis you are testing seems to want to simultaneously
challenge and support longstanding evidence through shifting frequency
without actually specifying how MUCH current should be applied. Thus
the hypothesis devolves to: "How does frequency enter into what has
already been observed?" Let me point out that this, too, already has
longstanding evidence of
doing pretty much offering the same outcome; and the state, for the
sake of economy, has long since abandoned the hypothesis of performing
executions with 100KHz electric chairs.
To put it simply, you have to many unstated and unfulfilled variables
to call your proposal a hypothesis.
73's
Richard Clark, KB7QHC
Mr. Clark,
The control is another steak is similar size from the same grocery
packaging, placed in a second apparatus that is not powered.
The idea is that a certain frequencies of low-voltage e-fields inhibit
cellular mitosis.
The professor saw an article in Science magazine about treating cancer
with these fields, and decided it would be a nice lab activity for his
students to observe other effects with this type of field.
http://www.rife.de/files/disruption_...eplication.pdf
Since generating an e-field in "meat" or "plant material" is not so easy,
this is part of the assignment. We need to figure it out and then fully
describe it in our methods section. The leaf people are using
high-voltage insulated wires. With "meat", which is larger, I don't think
this will work. I am wondering if I can use a low-voltage direct
connection.
My problem is that our group is weak on electromagnetism. They have been
floundering, and now I am floundering with them. I have some ideas, but
ideas are best vetted through those with PRACTICAL experience, which you
guys seem to have. I have also wasted almost 2 weeks by sitting in the
wrong group. OK I am an idiot in terms of BOTH electromagnetism and
reading directions.
Bottom line: I need to generate a 1V/cm field across a t-bone steak. Merit
or no merit (this is college). Does anyone have any place I might look on
line, or any book I might buy, or any advice on how I might accomplish
this?
Thank you.
the problem is, do you want the field 'inside' the meat, or in the air
around the meat? The problem is made harder because the steak is not only a
dielectric material, which changes the magnitude of the field, but is also
moderately conductive, which essentially shorts out the field. also, the
properties depend on the direction of the field... you might want to see if
your library has this article:
http://ieeexplore.ieee.org/xpl/freea...rnumber=300250 . personally
i would probably go the other way and suspend the meat on an insulating net
horizontally and put a plate above and below it that are bigger than the
steak. it is much easier to generate a uniform field between large parallel
conductive plates than with wires... as a first approximation make the
plates about double the largest dimension of the steak. it may be
acceptible to set the steak on one of the plates (sterilize it first) and
just suspend the other one above it.