Energy From Thorium Discussion Forum

It is currently Feb 23, 2018 9:22 am

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Oct 06, 2014 3:15 pm 
Offline

Joined: Jul 14, 2008 3:12 pm
Posts: 5060
The following research suggests space radiation has caused increased cataracts in astronauts:

http://emmrem.unh.edu/papers/cataracts.pdf

This seems a little unbelievable. Apart from the issues with the subjective methodology used, that such small dose would cause a huge increase in eye cataracts is hardly believable from a biological viewpoint.

The authors did not bother to check for spurious correlations. In particular, astronauts are exposed to high amounts of sunlight, both visual and ultraviolet. More time in space would correlate well with both greater ionizing radiation from cosmic rays and such, and with UV radiation (near and mid UV radiation is not considered ionizing). One would think this a much more important factor since it concentrates in the form of eye damage. Astronauts are the only group where this huge increase in eye cataracts is seen, which suggests gamma and x-rays to not be at fault. Otherwise everyone in Ramsar, Iran and other high background radiation areas would have to be completely blind by middle age.


Top
 Profile  
 
PostPosted: Oct 06, 2014 6:54 pm 
Offline

Joined: Dec 01, 2006 7:23 pm
Posts: 139
Perhaps cosmic rays act differently on the body than the alpha, beta and gamma rays. Most cosmic rays are protons, with some heavier nuclei. The energies are so high that they generate muons. From Wikipedia's "Health threat from cosmic rays", The quantitative biological effects of cosmic rays are poorly known, and are the subject of ongoing research.

_________________
Paul Studier


Top
 Profile  
 
PostPosted: Oct 06, 2014 9:27 pm 
Offline

Joined: Aug 29, 2008 4:55 pm
Posts: 496
Location: Idaho Falls, Idaho
Maybe they should have worn goggles while in space?


Top
 Profile  
 
PostPosted: Nov 03, 2014 9:32 pm 
Offline

Joined: Dec 14, 2006 1:01 pm
Posts: 380
It's much more likely to be an effect of their training in jet aircraft. It would be interesting to compare to military pilots.


Top
 Profile  
 
PostPosted: Nov 04, 2014 3:03 am 
Offline

Joined: Jul 14, 2008 3:12 pm
Posts: 5060
Ida-Russkie wrote:
Maybe they should have worn goggles while in space?


How much does this help for shielding high energy particles?


Top
 Profile  
 
PostPosted: Nov 04, 2014 3:08 am 
Offline

Joined: Jul 14, 2008 3:12 pm
Posts: 5060
rgvandewalker wrote:
It's much more likely to be an effect of their training in jet aircraft. It would be interesting to compare to military pilots.


That sounds logical. Could be a confounding factor. We'd need to know the lifetime doses.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group