Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 68,704   Posts: 1,482,705   Online: 896
      
Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 38
  1. #21

    Join Date
    Nov 2005
    Location
    Los Angeles, CA
    Shooter
    Multi Format
    Posts
    4,791

  2. #22
    Klainmeister's Avatar
    Join Date
    Jun 2010
    Location
    Santa Fe, NM
    Shooter
    4x5 Format
    Posts
    1,493
    Images
    30
    Quote Originally Posted by budrichard View Post
    I little knowledge can be a dangerous thing.
    Background, I have BS and MS degrees in Nuclear Engineering as well as having worked and managed all areas of Commercial Nuclear Power including Health Physics.
    The device shown, Inspector EXP has a limit of 300,000 Counts per Minute(CPM) or 100mr/Hr.
    Now one would not want to live in a 100mr/Hr radiation field but it would take over 4500 hours of continuous whole body exposure at 100 mr/Hr to reach the LD/50 or Lethal dose to 50% of the individuals exposed without any medical intervention.
    The video seems impressive but the levels measured don't appear to excede 10,000 CPM or further factor of 300 less exposure. So a little noise makes what is in reality very low readings seem very impressive.
    But there is more, the different organs of the body have different sensitivities to radiation, the lens of the eye being particularly more sensitive. Any beta(electrons) or Alpha(Helium nuclei) particles will be stoped by the body of the camera from reaching the eye leaving us to contend with Gamma(High energy Photons or light) particles.
    At the levels this device appears to be measuring and the usage factor, I would not have any worries.-Dick
    Hey Dick, you still work in the nuclear industry? Where ya at?
    K.S. Klain

  3. #23

    Join Date
    Sep 2011
    Location
    Adirondacks
    Shooter
    Multi Format
    Posts
    3,152
    Quote Originally Posted by BrianShaw View Post
    How would we see through the vest? I'd be more worried about getting that eye cancer that travels immediately to the brain.
    You get that from TV, not camera gear. Camera gear is actually an antidote.

  4. #24

    Join Date
    Jul 2011
    Shooter
    8x10 Format
    Posts
    2,288
    Lens design in the EU or for anything marketing to the EU has had to change due to ingredient
    restrictions, including radioactive or toxic. Some excellent lenses have disappeared from new mfg
    due to this. The classic dye transfer color prining process used a Thorium mordant. Some of us have
    substituted uranyl nitrate (lab grade yellowcake). Can cause a customs issue in certain cases, but 100g per purchase is really silly to question, because it would take shiploads of the stuff to make
    a dirty bomb.

  5. #25
    benjiboy's Avatar
    Join Date
    Apr 2005
    Location
    U.K.
    Shooter
    Multi Format
    Posts
    6,419
    What about Thorium toothpaste http://www.orau.org/ptp/collection/q...toothpaste.htm, the mind boggles.
    Ben

  6. #26

    Join Date
    Sep 2011
    Location
    Adirondacks
    Shooter
    Multi Format
    Posts
    3,152
    Quote Originally Posted by benjiboy View Post
    What about Thorium toothpaste http://www.orau.org/ptp/collection/q...toothpaste.htm, the mind boggles.
    You missed the radium water. http://www.orau.org/ptp/collection/q...aterjarwtr.htm

  7. #27
    Mainecoonmaniac's Avatar
    Join Date
    Dec 2009
    Shooter
    Multi Format
    Posts
    2,723
    Images
    6
    Quote Originally Posted by benjiboy View Post
    What about Thorium toothpaste http://www.orau.org/ptp/collection/q...toothpaste.htm, the mind boggles.
    Have anybody heard of Darkie toothpaste?

    http://en.m.wikipedia.org/wiki/Darlie
    "Photography, like surfing, is an infinite process, a constantly evolving exploration of life."
    Aaron Chang

  8. #28
    AgX
    AgX is offline

    Join Date
    Apr 2007
    Location
    Germany
    Shooter
    Multi Format
    Posts
    7,440
    A overview of photographic lenses containing radioactive elements:

    http://camerapedia.wikia.com/wiki/Radioactive_lenses

  9. #29

    Join Date
    Nov 2005
    Location
    Los Angeles, CA
    Shooter
    Multi Format
    Posts
    4,791
    Quote Originally Posted by Mainecoonmaniac View Post
    Have anybody heard of Darkie toothpaste?

    http://en.m.wikipedia.org/wiki/Darlie
    ... or Pit Stop, the auto racer's deoderant:

    http://www.autoweek.com/article/2011...news/110629885

  10. #30

    Join Date
    Jun 2003
    Shooter
    Multi Format
    Posts
    15,260
    Blog Entries
    2
    Images
    2
    Quote Originally Posted by BrianShaw View Post
    Even the real Fiesta (orange) was radioactive, not just cheap knockoffs.
    hi brian

    a friend in college used to tell me about artists who would buy any sort of fiestaware they could find, knock offs, the real thing
    and grind down the paint to make their own radioactive gazes ... from what i remember, it requires a government permit
    as a nuclear power facility ( or something like that ) because of handling issues ... this was told tome 25 years ago, i might be mis-remembering what he said

    Quote Originally Posted by Gerald C Koch View Post
    Both bananas and Brazil nuts are high in potassium. 40K is radioactive decaying mostly by emission of a beta particle. Fortunately for us it has a very long half-life of 1.2×109 years. Still each of us experiences about 4500 events/s from the potassium in the body.
    hi jerry,

    brazil nuts have amounts of selenium in them too
    and according to dr house too many brazil nuts
    can cause poisoning that looks very much like radiation poisoning
    you just need a moth larva antidote, it works well as a tea
    and counteracts both poorly advised chemotherapy as well as the selenium.

    it would be good kodak or ilford or ?? sold moth larvae with every container of
    selenium toner, it might come in handy !

Page 3 of 4 FirstFirst 1234 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin