rec.photo: live & let live

Jim Phelps wrote:


Yup. That's in that list of 'accoutrements'. I bid on some on that auction
site. Guy even had the loader for sale. But, it wasn't in the cards for me
that day. I'll keep looking.


They often seem to sell for more used then new. Add the risk of getting
the older model that supposedly doesn't work that well and I've given up and
trying to find an extra reel on the auction site.

Nick

jjs wrote:


Right outside my house is a Jobo ATL2 awaiting trash pickup. Boxes of tubes
and bottles, too. Hope the trash guys don't charge me extra to take it
away.


Tubes? Could they be print tanks? I'd kill for a couple extra-))

Nick

In article ,
(Mark Cudworth) wrote:

Just being pedantic, but positrons are anti-matter and can't exist in an
uranium (or any other kind of) atom. Matter can't "lose" anti-matter the
way atoms can shed electrons.

Probably was thinking Protons.

Question does antimatter collect positive matter
until it reaches some sort of
stasis thereby becoming positive itself?

--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

(Plutonium Committee) wrote in message . com...
(Uranium Committee) wrote in message . com...


All this written "Scientific Method" by the person who, in
rec.photo.darkroom, just recommended to someone to "Trial and Error"
it. Come on, who you trying to kid. You are inconsistent as hell!
You lose a positron?

For your information, 'trial and error' IS the application of the
scientific method. Basing your approach on myths or dogma and refusing
to look at results of trials is the opposite of the scientific method.
The Zonazis use myths and dogma handed down to them by Propaganda
Minister Minor Weiss.

Ansel über Alles!

Uranium, I think I can speak with some feeling of the general mood
here. No one would miss you if you half-life'd and turned into lead
and went away. In other words, you won't be missed if you never
posted here again. Why don't you easy your own internal pain and
frustration and lurk or even better, don't come here anymore.

What you want is of absolutely no interest to me. All you can talk
about is 'feelings'. That's a rather poor substitute for the
scientific method. It is not surprising that you Zonazis NEVER talk
about things in a scientific way. It is beyond your (severely) limited
understanding.

Mark Cudworth wrote:


Just being pedantic, but positrons are anti-matter and can't exist in an
uranium (or any other kind of) atom. Matter can't "lose" anti-matter the
way atoms can shed electrons.

Well, in fact, there are radioisotopes that decay with positron emission
-- they're the source for Positrom Emission Tomography imaging, a system
usually used to pinpoint energy usage by locating tagged glucose (used
for tracing activity in the brain, mostly).

I don't offhand recall what decay event emits a positron, other than
that it's not a common one like alpha (helium nucleus) or beta-
(electron) emission. It's a combination of energy-matter exchange
(creation of a particle, usually from released binding energy) and
charge conservation that does it. A neutron decaying to a proton (as
when tritium decays to helium-3) emits an electron; I think I remember
either a positive muon or positive pion can decay with positron
emission, and IIRC these particles are produced by some alpha or beta
emissions -- this is all very hazy, I'm not a physicist or medical
imaging technician, who would know this stuff. There are also cases
where a gamma ray photon can convert to an electron-positron pair (often
with a much lower energy photon, neutrino, etc. "left over"), an
activity typically associated with an annihilation event.

In any case, while a decaying nucleus doesn't directly emit positrons as
it can electrons, there certainly are decay events related to common
radioactivity that do emit positrons as part of a particle decay series.

--
I may be a scwewy wabbit, but I'm not going to Alcatwaz!
-- E. J. Fudd, 1954

Donald Qualls, aka The Silent Observer
Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm
Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.

Mark Cudworth wrote:


Just being pedantic, but positrons are anti-matter and can't exist in an
uranium (or any other kind of) atom. Matter can't "lose" anti-matter the
way atoms can shed electrons.

Well, in fact, there are radioisotopes that decay with positron emission
-- they're the source for Positrom Emission Tomography imaging, a system
usually used to pinpoint energy usage by locating tagged glucose (used
for tracing activity in the brain, mostly).

I don't offhand recall what decay event emits a positron, other than
that it's not a common one like alpha (helium nucleus) or beta-
(electron) emission. It's a combination of energy-matter exchange
(creation of a particle, usually from released binding energy) and
charge conservation that does it. A neutron decaying to a proton (as
when tritium decays to helium-3) emits an electron; I think I remember
either a positive muon or positive pion can decay with positron
emission, and IIRC these particles are produced by some alpha or beta
emissions -- this is all very hazy, I'm not a physicist or medical
imaging technician, who would know this stuff. There are also cases
where a gamma ray photon can convert to an electron-positron pair (often
with a much lower energy photon, neutrino, etc. "left over"), an
activity typically associated with an annihilation event.

In any case, while a decaying nucleus doesn't directly emit positrons as
it can electrons, there certainly are decay events related to common
radioactivity that do emit positrons as part of a particle decay series.

--
I may be a scwewy wabbit, but I'm not going to Alcatwaz!
-- E. J. Fudd, 1954

Donald Qualls, aka The Silent Observer
Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm
Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.

Donald Qualls writes:

Well, in fact, there are radioisotopes that decay with positron emission

Good grief! Yes, I understand all kinds of neat things can be created by
nuclear decay (or destruction). I was responding to a poster who (in
jest) asked if losing a positron would make uranium more negative.
Sub-atomic decay isn't a method by which atoms change their ionic state.

--
Mark Cudworth

"Mark Cudworth" wrote in message
...
Donald Qualls writes:

Well, in fact, there are radioisotopes that decay with positron emission

Good grief! Yes, I understand all kinds of neat things can be created by
nuclear decay (or destruction). I was responding to a poster who (in
jest) asked if losing a positron would make uranium more negative.

No, I was suggesting that Uranium Subcommittee (who is really Mike
Scarpitti) was negative because he lost a positron. Now, don't you agree
that Mr. Uranium is made of anti-matter?

In article , "jjs"
wrote:

Mr. Uranium is made of anti-matter?

More like doesn't matter.

--
LF Website @ http://members.verizon.net/~gregoryblank

"To announce that there must be no criticism of the President,
or that we are to stand by the President, right or wrong,
is not only unpatriotic and servile, but is morally treasonable
to the American public."--Theodore Roosevelt, May 7, 1918

jjs wrote:

"Mark Cudworth" wrote in message
...

Donald Qualls writes:

Well, in fact, there are radioisotopes that decay with positron emission

Good grief! Yes, I understand all kinds of neat things can be created by
nuclear decay (or destruction). I was responding to a poster who (in
jest) asked if losing a positron would make uranium more negative.


No, I was suggesting that Uranium Subcommittee (who is really Mike
Scarpitti) was negative because he lost a positron. Now, don't you agree
that Mr. Uranium is made of anti-matter?



I was just figuring (in an Asimovian sort of way) that would mean he was
a few positrons shy of a brain...

--
I may be a scwewy wabbit, but I'm not going to Alcatwaz!
-- E. J. Fudd, 1954

Donald Qualls, aka The Silent Observer
Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm
Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.