HDTenEightyP/NetNews huggingface dataset:
From: cpsigd01@ulkyvx.louisville.edu
Subject: Re: irradiating stuff as science project(s)
Date: Thu, 7 Jan 1993 15:23:52 GMT
Organization: University of Louisville

In article <8374@news.duke.edu>, sherouse@RadOnc.Duke.EDU (George W. Sherouse) writes:
> 
> I have been asked to suggest an experiment to a high school student
> involving the irradiation and observation of some biological system.
> I suggested the (classic) irradiation of seeds to different doses and
> subsequent determination of the dose-dependence of germinating
> fraction.
> 
> My questions:
> 
> 1) Can anyone supply details for irradiation of seeds?  What kind of
> seeds and range of doses constitute a good model?
> 
> 2) Is there any other (maybe better) model one could use?
> 
> Thanks.
> 
> - George
Seeds are very resistant to ionizing radiation.  This may inconvenience the
group that you ask to irradiate them.  I would suggest the following:

1. The student should grow several (maybe 10) Coleus plants from seed.
2. When they reach 5 inches in height will:
	A. One group - do nothing (control)
	B. Second group- prune the plant tips (this will enhance side growth
development)
	C. Third group- irradiation with x-rays or Cobalt-60 gamma rays the
plant tips.
	D. Fourth group irradiate as in C the main stem (not the tips)
	E. Fifth group irradiate only the roots.

3.  Measure plant growth.
4.  I can only guess what dose to use. Perhaps 1000 RADS or 10 Grays.
Newsgroups: sci.med.physics
From: vsvankay@acs.ucalgary.ca (Hima Sagar- The Humming Bird)
Subject: What is Radiation Oncology ?
Date: Sat, 09 Jan 93 08:37:23 GMT
Distribution: na
Organization: E & C Engg., Univ. Of Calgary, Calgary, Canada
Keywords: Radiation oncology, info, please
Followup-To: sci.med.physics

Hi,

Could somebody explain what is involved in radiation oncology ?
Info on the fields of study involved and background needed to become
a radiation oncologist would be highly appreciated. Please email to
vsvankay@acs.ucalgary.ca.
I will summarize if there is sufficient interest.

Again, please excuse my ignorance, as I am a zippo in medical areas.

Thanx very much for your help.

Cheers,
Vidya.




-- 
Vidya 'Hima' Sagar 
vsvankay@acs.ucalgary.ca (or) vankay@enel.ucalgary.ca
Newsgroups: sci.med.physics
From: cpsigd01@ulkyvx.louisville.edu
Subject: Re: Fellowships for Medical Physics?
Date: Wed, 6 Jan 1993 18:54:43 GMT
Organization: University of Louisville

In article <1993Jan3.021515.1@adcalc.fnal.gov>, bliss@adcalc.fnal.gov writes:
> Does anyone out there know of any Fellowships or other forms of financial aid
> available for someone pursuing a Masters Degree in Medical Physics?  Any
> information would be appreciated.
> 
> Kevin
You have already obtained some information concerning pre-doctoral fellowships.
For those who already have training in Physics (say a Ph.D.), there are 
post-doctoral training programs (sometimes called Resident Training Program)
in Medical Physics.  These are 1-2 years and provided a stipend.  On-the-job
training in Radiological Physics is offered in prepration for taking 
National Board Exams.  Job prospects are good in either clinical or 
academic sites.  The salary is quite good, but varies depending upon the
geographical location.  Good Luck.-- 
****************************************************************************
* Curt SIGDESTAD, Univ. Louisville  	    "OLD AGE AND TREACHERY WILL    *
* CPSIGD01@ULKYVX.CT.LOUISVILLE.EDU	     OVERCOME YOUTH AND SKILL."    *
* CPSIGD01@ULKYVX.BITNET	                                           *
* 			(502)588-7722   (502)588-8072 FAX                  *
****************************************************************************
Newsgroups: sci.med.physics
From: glowboy@robot.nuceng.ufl.edu (Louis H Iselin)
Subject: Re: Fellowships for Medical Physics?
Summary: try AAPM or physicist at your local hospital 
News-Software: VAX/VMS VNEWS 1.41    
Organization: Nuclear Engineering Sciences - Univ. of Florida
Date:  5 Jan 1993 12:04 EST  

In article <1993Jan3.021515.1@adcalc.fnal.gov>, bliss@adcalc.fnal.gov writes...
>Does anyone out there know of any Fellowships or other forms of financial aid
>available for someone pursuing a Masters Degree in Medical Physics?  Any
>information would be appreciated.
> 
>Kevin

First, sorry to George for the e-mail, I pushed the wrong button ... :)

Try Amer. Assn. of Physicists in Medicine (AAPM - part of the American
Institute of Physics, the umbrella organization which contains APS, etc.)

The fellowships from the Health Physics Society and US Dept. of Energy are
for health physics and the DOE fellowships expressly forbid medical physics
study.

Good Luck,

Louis H Iselin
UFla. Nuclear Engineering Sciences
DOE Health Physics Fellow (1988-1992)

for information on the UFla. Programs in:
	Nuclear Engineering - Dr. E.T. Dugan
	Health Physics      - Dr. D.E. Hintenlang
	Medical Physics     - Dr. L. Brateman
	Engineering Physics - Dr. A.M. Jacobs
write --

Program Coordinator in _________
University of Florida
Department of Nuclear Engineering Sciences
202 Nuclear Sciences Center
Gainesville, FL  32611-2055

(904) 392-1401
From: stpeters@crd.ge.com (Dick St.Peters)
Newsgroups: sci.med.physics
Subject: Re: resisting electromagnetic radiation
Date: 13 Jan 93 00:13:49 GMT
Reply-To: stpeters@crd.ge.com
Organization: GE Corporate R&D

In article 1ikm78INNcip@post.its.mcw.edu, jmoulder@post.its.mcw.edu (John Moulder) writes:
>> I've heard of people using some device which sprays negative
>> ions in the air, I believe, in order to reduce the hazard.
>
>They are probably tqlking about negative ion generators.  These 
>will have absolutely no effect on electromagnetic fields.

Correct.  What these things do is negatively charge particles (dust) in
the air, causing them to be attracted and stick to nearby surfaces.
Usually, the point is to clean the air in semiconductor cleanrooms.
They do have a medical use: cleaning the air for people allergic enough
to dust or pollen that they will accept plating their walls with grime.
Their lungs too, maybe ...

--
Dick St.Peters
GE Medical Systems, New Berlin, WI  stpeters@med.ge.com (temporary)
GE Corporate R&D, Schenectady, NY   stpeters@crd.ge.com (permanent & forwarded)
Xref: sparky sci.med.physics:545 sci.engr.biomed:681 sci.engr:2484
From: fil@cs.ucsd.edu (Filippo Menczer)
Newsgroups: sci.med.physics,sci.engr.biomed,sci.engr
Subject: x-ray sensor maker wanted
Date: 12 Jan 93 02:06:07 GMT
Followup-To: sci.med.physics
Distribution: ca
Organization: CSE Dept., U.C. San Diego

Hello, 

this is my first posting so please be patient.
I need help and I am not sure this is the right newsgroup to
write to, so I would also appreciate pointers to better places
where I can look.

I need to find a company, to my knowledge located in 
Southern California, which makes the following product:

- an X-RAY SENSOR used for x-ray imaging in dentistry; 
- it converts x-ray photons directly into electric pulses;
- used as an alternative to (radiation-shielded) CCD; 
- perhaps (?) another application is for industrial-use cameras;
- dimensions: 18mm x 24mm x 5mm (external, packaged width);
- protected from radiation for "long working life";
- min. resolution: 8 lines/mm;
- min. definition: 0.1 mm;
- it is currently used in a x-ray imaging system for
  dentists made by Philips (Dutch electronics giant);
  the interface of this system produces an 8-bit image
  (256 gray-scales) for a PC;
- the same company is (?) developing a larger x-ray sensor.

If somebody knows who produces this sensor, please reply
to me via e-mail (I don't read this newsgroup).
I would appreciate any info through which I can get in touch
with this company (name, address, phone, email, fax...).

Thank you for your help.

fil@cs.ucsd.edu

Filippo Menczer
CSE Dept. 0114
UC San Diego
La Jolla, CA 92093-0114 USA
From: jmoulder@post.its.mcw.edu (John Moulder)
Newsgroups: sci.med.physics
Subject: Re: How much radiation can an organism survive? (Panspermia)
Followup-To: sci.med.physics
Date: 4 Jan 1993 18:41:08 GMT
Organization: Medical College of Wisconsin
Distribution: world
Reply-To: jmoulder@post.its.mcw.edu (John Moulder)
NNTP-Posting-Host: moulder.radbio.mcw.edu
Keywords: panspermia, radiation

>  The Panspermia hypothesis is that after life originates on one
> planet (or in a molecular cloud, or whatever) it can be
> transportedby natural causes to other planets . . . 

  <stuff deleted>

> Anyway, does anyone have a reference for the work on the
> microbe spores?  I am interested in exactly how much radiation 
> these things can take.

No endorsement of the theory, but yes, "primitive life forms" 
can take pretty high doses.  Whether these doses are high enough 
to fit the theory depends on:
1) dose rates in space (someone must know, but I don't)
2) assummed transit times
3) assumed shielding (naked, or inside a rock)

In any case, approximate 50% lethal doses from DS Grolch and LE 
Hopwood, Biological Effects of Radiations, Academic Press, 1979.  
Where there is a range I have given the maximums.

humans:            500 rad
plants:         50,000 rad
insects:        50,000 rad
brine shrimp:   70,000 rad (wet)
               250,000 rad (dry)
bacteria:      100,000 rad
virus:         500,000 rad
protein:    10,000,000 rad (wet)
           200,000,000 rad (dry)

And yes, I double checked the number of zeros (-:

John Moulder (jmoulder@post.its.mcw.edu)    Voice: 414-266-4672
Radiation Biology Group                       FAX: 414-257-5033
Medical College of Wisconsin, Milwaukee

John Moulder (jmoulder@post.its.mcw.edu)      414-266-4672
Radiation Biology Group
Medical College of Wisconsin, Milwaukee, Wisc
From: sherouse@RadOnc.Duke.EDU (George W. Sherouse)
Newsgroups: sci.med.physics
Subject: irradiating stuff as science project(s)
Date: 6 Jan 93 21:37:02 GMT
Organization: Radiation Oncology, Duke Univ. Medical Center
Originator: sherouse@roentgen.RadOnc.Duke.EDU


I have been asked to suggest an experiment to a high school student
involving the irradiation and observation of some biological system.
I suggested the (classic) irradiation of seeds to different doses and
subsequent determination of the dose-dependence of germinating
fraction.

My questions:

1) Can anyone supply details for irradiation of seeds?  What kind of
seeds and range of doses constitute a good model?

2) Is there any other (maybe better) model one could use?

Thanks.

- George
From: andys@mph.sm.ucl.ac.uk (Andrew Simmons)
Newsgroups: sci.med.physics
Subject: Address for ADAC
Date: 8 Jan 93 11:53:44 GMT
Reply-To: andys@mph.sm.ucl.ac.uk
Organization: Medical Physics Dept., University College, London, UK

Does anyone have an e-mail address or postal address for ADAC
(manufacturers of Nuclear Medicine software). Either the States
or UK would be great.

Thanks,
        Andy Simmons

 ----------------------------------------------------------------------------
 Andrew Simmons                JANET   : andys@uk.ac.ucl.sm.mph
 Dept. of Medical Physics      BITNET  : andys%uk.ac.ucl.sm.mph@ukacrl.bitnet
 University College London     INTERNET: andys@mph.sm.ucl.ac.uk
 Capper St,LONDON WC1E 6JA,UK  Tel: +44 71-380-9700     Fax: +44 71-380-9577
 ----------------------------------------------------------------------------
Newsgroups: sci.med.physics
From: denise@isl.stanford.edu (Denise M. Cuevas)
Subject: resisting electromagnetic radiation
Organization: Information Systems Lab, Stanford University
Distribution: sci.med.physics
Date: 7 Jan 93 17:55:01


Call me an ignorant, radical fool, but the fact remains that I want to
decrease my exposure to electromagnetic radiation. I've heard the
pro and con arguments on whether this is a true hazard, and I've
decided to be on the safe side. Unfortunately, I'm surrounded by it,
most noticeably from powerlines near my house and computer terminals
and copiers in my office.

I've heard of people using some device which sprays negative ions in
the air, I believe, in order to reduce the hazard. This doesn't make a
lot of sense to me and leads to the question - is a spray of negative
ions dangerous? 

Has any research been done on blocking electromagnetic radiation? I
assume that planting trees between my house and the power lines
would be ineffective. How about buttressing the walls of my house with
some sort of repulsing material?

I would like to get pregnant soon, so I'm wrestling with whether I
should quit my job (to reduce my exposure to the copiers and
computers) and lose my medical coverage.

Any thoughts?

Thanks,
Denise Cuevas
From: dh@fncrd6.fnal.gov (don husby)
Newsgroups: sci.med.physics
Subject: dental.chemistry?
Date: 10 Jan 1993 19:34:07 GMT
Organization: Fermilab
Distribution: world
NNTP-Posting-Host: fncrd6.fnal.gov
Summary: Question about tooth chemistry and role of Florine and Chlorine

  Since I couldn't find any newsgroups related to dentistry, I
thought s.m.p might be the right place for this query:
  I have noticed that as the weather gets cold and I have to start
swimming in indoor, chlorinated pools, that my teeth seem to be
rougher and more succeptable to staining.  Since florine has
something to do with teeth, and chlorine is chemically related, I
suspect that maybe chlorine un-does the good things that florine does.
  Can anyone offer some insight?  What does florine do for teeth?
From: caf@omen.UUCP (Chuck Forsberg)
Newsgroups: sci.med
Subject: Re: resisting electromagnetic radiation
Date: 9 Jan 93 00:17:03 GMT
Article-I.D.: omen.1993Jan09.001703.3078
Distribution: sci.med, sci.med.physics, sci.engr.biomed, misc.health.alternative
Organization: Omen Technology INC, Portland Rain Forest

In article <1993Jan8.082352.12105@mr.med.ge.com> hinz@picard.med.ge.com (David Hinz (hinz@picard.med.ge.com)) writes:
>Denise M. Cuevas (denise@isl.stanford.edu) wrote:
>: 
>: Has any research been done on blocking electromagnetic radiation? I
>: assume that planting trees between my house and the power lines
>: would be ineffective. How about buttressing the walls of my house with
>: some sort of repulsing material?
>
>A Faraday cage is used to block RF leakage, can't really speak for 60Hz 
>though.  Basically, what you need is a conductive box, with no gaps,
>surrounding that which you want to keep  the RF out of (or in).
>
>At the frequencies that MRI uses, copper mesh is sufficient, although
>copper foil/sheet or welded steel (3/8") is usually used.  I would have
>to defer to someone with more RF experience than I to tell you if this would
>help at microwave or ELF frequencies.  (MRI uses frequencies in the TV/FM
>radio band, usually 21 MHz to 63 MHz, up to 170MHz for 4 tesla systems).

A Faraday cage should reduce 60 Hz magnetic fields somewhat
thanks to induced currents.  Doors and windows would be a
problem.  I don't think you could afford to do it "right" with
mu-metal properly installed.

An iron or steel sheet under the bed might reduce 60 Hz magnetic
fields somewhat.

In a single-phase residential situation, it may be possible to
reduce the 60 Hz magnetic fields by balancing the currents on
either side of neutral.  The procedures audiophiles use to
eliminate ground loops may be useful.

-- 
Chuck Forsberg WA7KGX          ...!tektronix!reed!omen!caf 
Author of YMODEM, ZMODEM, Professional-YAM, ZCOMM, and DSZ
  Omen Technology Inc    "The High Reliability Software"
17505-V NW Sauvie IS RD   Portland OR 97231   503-621-3406
From: turpin@cs.utexas.edu (Russell Turpin)
Newsgroups: sci.med
Subject: Re: Impotence treatments
Summary: Very likely a physical problem.
Date: 10 Jan 93 17:05:07 GMT
Organization: CS Dept, University of Texas at Austin
NNTP-Posting-Host: im4u.cs.utexas.edu

-*----
In article <1993Jan10.151531.5386@eng.umd.edu> georgec@eng.umd.edu (George B. Clark) writes:
> Journal of Urology, 1991;145, 1989;145 &141
>
> Impotence can be the first sign of a brain tumor, nerve damage,
> arteriosclerosis, hormone imbalance, emotional disorder, cancers, 
> or infections.

Undoubtedly rhinocerous horn will cure all of these.  Strange,
though, that the ancient Chinese sages do not prescribe it 
for these problems when they present very different symptoms.
I guess rhinocerous horn only cures arteriosclerosis when it
causes impotency.

> Six out of ten times, however, the man has arteriosclerosis, ...

A neurosurgeon of my acquaintance was once referred a patient, a
married man, who had developed difficulty walking for more than a
short distance.  The surgeon thought the problem was blood
supply, and in exploring this possibility, he asked the man when
he had last had sex.  Several years was the answer.  It turned
out that the man had an obstruction in the lower part of the
aorta, which after correction (by a vascular surgeon) not only
restored the patient's ability to walk as far as he wanted, but
also greatly rejuvenated his conjugal relations. 

The sad part of this story is that the man had not gone to a
physician for his impotence, but had waited until he had
difficulty walking.  If the arterial problem had been one that
risked rupture, he might have died for his unwillingness to view
his impotence as a likely symptom of a physical problem.  As it
is, he experienced several needless years of sexless marriage. 

Russell
Newsgroups: sci.med
Subject: Re: sex, menstruation, endometriosis
From: RGINZBERG@eagle.wesleyan.edu (Ruth Ginzberg)
Date: 5 Jan 93 09:06:34 EDT
Distribution: world
Organization: Philosophy Dept., Wesleyan University
X-News-Reader: VMS NEWS 1.20In-Reply-To: keri@maths.uwa.oz.au's message of 5 Jan 1993 03:08:56 GMTLines: 20

In <1iau48INN8bd@uniwa.uwa.edu.au> keri@maths.uwa.oz.au writes:

> 	What is 'retrograde menstruation'?

The flow of menstrual fluids backwards, exiting the uterus through the
fallopian tubes rather than through the cervix & vagina, as they are usually
supposed to. That is, if in fact it exists.  There is a tiny space between the
ovaries and the top end of the fallopian tubes (which ova regularly traverse
without getting "lost" in the peritoneal cavity).  The hypothesis is that in
'retrograde menstruation', menstrual fluids barge all the way up the tubes
(note that sperm, in order to accomplish this feat, must 'swim';  there is no
physiological mechanism to 'wash' them in that direction), & then spray
themselves around on your innards.

I have trouble imagining how one would test for such a condition, let alone
come up with statistics about how frequently it does or does not occur.

------------------------
Ruth Ginzberg <rginzberg@eagle.wesleyan.edu>
Philosophy Department;Wesleyan University;USA
Newsgroups: sci.med
From: larry@bradley.bradley.edu (L. D. Stratton)
Subject: Yocon
Organization: Bradley University
Date: Fri, 8 Jan 93 16:14:15 GMT

I've been taking Yocon for about 3 days now but the sideeffects are 
really bad, at least I think they are the sideeffects.

I've had insomnia, a physiological condition similar to anxiety without
the accompanying mental state, very cold extremities.  The PDR describes
nausea, dizziness (although my SO wonders how I would notice), nervousness,
irritability, sweating.  These don't seem to be pronounced except as 
noted.

Will these adverse reactions dissipate as dosage continues? Right now
I'm TID but the worst is yet to come.  I can handle everything except
the insomnia.

HELP!!!
From: geb@cs.pitt.edu (Gordon Banks)
Newsgroups: sci.med
Subject: Re: Adiposity 101
Date: 5 Jan 93 15:44:46 GMT
Reply-To: geb@cs.pitt.edu (Gordon Banks)
Organization: Univ. of Pittsburgh Computer Science

In article <1992Dec30.093539.11348@omen.UUCP> caf@omen.UUCP (Chuck Forsberg) writes:

>>to you.  This is a further demonstration of the problem with HMOs.
>
>I thought Kaiser was a well-run organization, stuff of Legends, etc.
>

It is, as HMOs go.  But the problem is generic to HMOs.  You don't get
to choose your physician.  If the one you have doesn't cooperate,
you are stuck.

-- 
----------------------------------------------------------------------------
Gordon Banks  N3JXP      | "I have given you an argument; I am not obliged
geb@cadre.dsl.pitt.edu   |  to supply you with an understanding." -S.Johnson
----------------------------------------------------------------------------
From: geb@cs.pitt.edu (Gordon Banks)
Newsgroups: sci.med
Subject: Re: Migraine Medication
Date: 12 Jan 93 20:29:07 GMT
Reply-To: geb@cs.pitt.edu (Gordon Banks)
Organization: Univ. of Pittsburgh Computer Science

In article <AMT.93Jan5124847@dunvegan.linus.mitre.org> amt@linus.mitre.org (Anne Tallant) writes:
>>
>>In my experience, propranolol is more effective than verapamil, although
>>more people have side effects.
>
>One of these side effects is depression.  Take a hypothetical case where
>an individual, who is already taking an antidepressant for depression,
>experiences this side effect (ie. experiences depression despite the fact
>that the antidepressant had controlled the original source of depression).
>What are the possible courses of action that could be taken to offset the
>depression that appears to be a side effect of the propranalol?

Taking less propranolol would be the only thing I could suggest.
I usually won't use it in patients who have a history of depression
and have never used it in anyone already on antidepressants for
depression.




-- 
----------------------------------------------------------------------------
Gordon Banks  N3JXP      | "I have given you an argument; I am not obliged
geb@cadre.dsl.pitt.edu   |  to supply you with an understanding." -S.Johnson
----------------------------------------------------------------------------
From: geb@cs.pitt.edu (Gordon Banks)
Newsgroups: sci.med
Subject: Re: What's Lorazepam
Date: 4 Jan 93 16:29:40 GMT
Reply-To: geb@cs.pitt.edu (Gordon Banks)
Organization: Univ. of Pittsburgh Computer Science

In article <1992Dec26.013553.295@vpnet.chi.il.us> gpond@vpnet.chi.il.us (george pond) writes:
>Whats Lorazepam and how does it compare to Valium or does it all.  Is
>it addictive?  What's the usual dose.

It is a close relative of Valium with a longer half-life.  It is
addictive.  I use it mostly to break status epilepticus, and it
that case the initial dose is 4mg IV.  It produces less respiratory
depression and is easier on the veins than IV Valium.
It is also used as a tranquilizer in oral doses of 1 or 2 mg.

-- 
----------------------------------------------------------------------------
Gordon Banks  N3JXP      | "I have given you an argument; I am not obliged
geb@cadre.dsl.pitt.edu   |  to supply you with an understanding." -S.Johnson
----------------------------------------------------------------------------
From: pburch@roc.mbcr.bcm.tmc.edu (Paula Burch)
Newsgroups: sci.med
Subject: Re: sex, menstruation, endometriosis
Date: 6 Jan 1993 15:38:29 GMT
Organization: Baylor College of Medicine, Houston, Tx
Distribution: world
Reply-To: pburch@bcm.tmc.edu
NNTP-Posting-Host: roc.mbcr.bcm.tmc.edu
Originator: pburch@roc.mbcr.bcm.tmc.edu


In article <1993Jan5.090634.580@news.wesleyan.edu>, RGINZBERG@eagle.wesleyan.edu 
(Ruth Ginzberg) writes:
> ....The hypothesis is that in
> 'retrograde menstruation', menstrual fluids barge all the way up the tubes
> (note that sperm, in order to accomplish this feat, must 'swim';  there is no
> physiological mechanism to 'wash' them in that direction), & then spray
> themselves around on your innards.

While I agree that 'retrograde menstruation' appears to be no more than 
a speculation, you must be mistaken about the lack of a physiological 
mechanism to propel something up from vagina to fallopian tubes. 

Talc is sometimes found in the ovaries, evidently as a result of 
application either externally or onto a contraceptive diaphragm. The
explanation given--perhaps again a speculation--was that the same 
mechanism that serves to help sperm move upward can also move other 
particles. (In case you missed that story, this sort of usage of 
talcum powder is supposed to be associated with an increased risk of 
ovarian cancer.)

I can't quite imagine how else the particles of talc may have made their
way into the ovaries where they were found, short of gross error on
the part of the researchers.

Paula Burch
pburch@bcm.tmc.edu
Newsgroups: sci.med