From: b5249-23@mathcs.sjsu.edu (Kurt Stocklmeir)
Newsgroups: sci.med
Subject: cancer
Date: 8 Oct 92 22:56:25 GMT
Organization: San Jose State University - Math/CS Dept.

If anybody can answer the following questions, please send mail.

This is associated with exciting haematoporphyrin.  I am trying
to find a method of putting a molecule of this dye in an excited state by
using any kind of collision.  To start, I need to be careful when I use
the word collision.  A collision can occur when 1 particle hits another
particle.  However, in physics a collision between charged particles can
occur through interaction of electric fields and magnetic fields.  An
electric field of an electron can transfer momentum to a charged particle
while the electron is a large distance from the charged particle. 

In general, collisions between particles can transfer energy.  For
example, a moving electron can collide with an atom and transfer
energy to an electron in the atom.  The electron in the atom can go
into a higher energy level or escape the atom.

In some dye lasers, fast electrons are used to collide with the dye.  When
electrons collide with the dye, the dye goes into an excited state.

Collisions are also used in gas lasers.  Molecules in an excited state
can transfer energy to another kind of molecule in a collision. In a
HeNe laser, He is first put in an excited state.  That means an electron
in He is at a higher energy level.  He then collides with Ne.  He goes
into a lower energy level and Ne goes into a higher energy level since He
and Ne have about the same energy at that 1 level.

Collisions between hydrogen atoms occur in galaxies.  This creates
21 cm radiation.  In a hydrogen atom the electron can spin in the
same direction and opposite direction as compared to the proton.
1 kind of system has a small amount more energy that the other kind
of system.  A hydrogen atom at the lowest energy level can collide
with another hydrogen atom and because of that the spin of the
electron changes direction.  The electron then goes back to the
lower energy and emits electromagnetic radiation.  The wavelength
is 21 cm.

1 big problem is how fast can a particle like an electron, proton, or ion
can move in a liquid.????  I could be wrong, but I think an electron with
1.8 ev of kinetic energy has a velocity of about 800,000 m/s.  I think an
ion like Ca, Zn, K would need to move at about 2000 m/s.  Most molecules in
a gas move at about 800 m/s at about 90 degrees f.

1 example that could help to find out how fast a molecule can move
in a liquid is rotating molecules.????  This method could also be used to
excite haematoporphyrin.????  Microwave ovens heat food by making H2O molecules
rotate.  This method is also used to relax muscles in people.  The mircowaves
go through the fat where there is not a lot of H2O but gets absorbed
by the H2O in muscles.
                                             12
I think H2O molecules rotate in food about 10    times each second.????
If that is true, then they must be rotating at a high speed.???? 

I can not remember since it has been a long time, but it is something like the
alternating electric field of the mircowave radiation causes the
H2O molecules to rotate since they are polar molecules.  I think
1 or only a small number of frequencies of microwave radiation can be used
to make H2O molecules rotate, but I am not positve why.????  I think the
wavelength needs to be about the same size as the molecule or something.
But I do not know many things.  I do not know the moment of inertia for a
H2O molecule.????  That means I can not figure out the kinetic energy
of a H2O molecule that is rotating because of microwave radiation.????

kinetic energy = .5Iww
where I is moment of inertai
w is angular velocity

I do not know if anybody has ever done research with a maser to
heat food, since it is not needed.????

If H2O molecules can not get at least 1.8 ev of kinetic energy rotating
other methods could also be used.  For example, when mass is rotating,
the force increases as the distance from the center of rotation increaes.
The ends of molecules that are longer would be moving much faster when
rotating with the same angular velocity as compared to H2O.  Even
if a molecule is not polar, an electric dipole moment can be created
by an electric field.  This applies to proteins, dyes, etc.  Because
the molecule would have an electric dipole moment, it would vibrate
in mircowave radiation like H2O molecules.  But the frequency of
mircowave radiation would not be the same.????

most complex molecules have 3n-6 resonant frequencies.  This is
associated with vibration.  I think I have heard about moving
up through this kind of energy level to get to an excited state
where an electron gets into a higher energy level.????

I have been told that sound and ultasound can also be used to
put haematoporphyrin in an excited state.  Somebody may know
something about exciting molecules only of a certain size or shape
using certain frequenciesof sound.????
Newsgroups: sci.med