1,146
edits
Changes
Jump to navigation
Jump to search
Line 20:
Line 20: − + Line 49:
Line 49: − + + + + + Line 61:
Line 65: − + + + + + + + + + Line 78:
Line 90: + +
more on Mertz & additional refs
</blockquote>
</blockquote>
=1855 Elias Kane =
=1855 Elisha Kane =
Kane, E.K. Arctic Explorations. The second Grinnell expedition in search of Sir John Franklin, 1853, 1854, 1855. Ed. Loomis, C. and Martin, C. R.R. Donnelley & Sons Co, Chicago: 1996.
Kane, E.K. Arctic Explorations. The second Grinnell expedition in search of Sir John Franklin, 1853, 1854, 1855. Ed. Loomis, C. and Martin, C. R.R. Donnelley & Sons Co, Chicago: 1996.
=1911 Douglas Mawson=
=1911 Douglas Mawson & Xavier Mertz=
In 1911-12, while exploring the Antarctic coast, Australian Douglas Mawson and Swiss Xavier Mertz lost their supplies when their companion Briton Belgrave Ninnis fell into a cravasse. Mawson and Mertz were forced to eat their huskies.
In 1911-12, while exploring the Antarctic coast, Australian Douglas Mawson and Swiss Xavier Mertz lost their supplies when their companion Briton Belgrave Ninnis fell into a cravasse. Mawson and Mertz were forced to eat their huskies.
Cleland J, Southcott RV. Hypervitaminosis A in the Antarctic in the Australasian Antarctic Expedition of 1911-1914: a possible explanation of the illness of Mertz and Mawson. Med J Aust 1969; 1: 1337-1342.
Shearman DJ. Vitamin A and Sir Douglas Mawson. BMJ 1978; 1: 283-285.
Nataraja, A. Man’s best friend? Student BMJ 10 (2002)158-9 (http://www.studentbmj.com). A summary of Mawson, D., Fiennes, R. Home of the blizzard, a true storyof Antarctic survival.Edinburgh:Birlinn,2000. (Both Mawson and Fiennes have books describing their antartic experiences, which are in Strozier Library)
Nataraja, A. Man’s best friend? Student BMJ 10 (2002)158-9 (http://www.studentbmj.com). A summary of Mawson, D., Fiennes, R. Home of the blizzard, a true storyof Antarctic survival.Edinburgh:Birlinn,2000. (Both Mawson and Fiennes have books describing their antartic experiences, which are in Strozier Library)
:...
:...
<blockquote>
<blockquote>
Just 100g of husky liver contains the toxic dose of vitamin A for an adult male. With six dogs between them(with a liver on average weighing 1kg), the pair would have ingested around 60 toxic doses between them. Mawson ate far less liver than Mertz which, inall probability, is why Mertz was more seriously (indeed, fatally) affected. Mawson preferred to give the comparatively tender meat to his travelling companion, who could not bear to chew on the otherwise very tough flesh of his beloved dogs.
Just 100g of husky liver contains the toxic dose of vitamin A for an adult male. With six dogs between them(with a liver on average weighing 1kg), the pair would have ingested around 60 toxic doses between them. Mawson ate far less liver than Mertz which, in all probability, is why Mertz was more seriously (indeed, fatally) affected. Mawson preferred to give the comparatively tender meat to his travelling companion, who could not bear to chew on the otherwise very tough flesh of his beloved dogs.
</blockquote>
</blockquote>
The case of Mertz is discussed by Carrington-Smith, who suggests that Mertz's symptoms can be accounted for by severe food deprivation, rather than vitamin toxicity. Her article has a nice concise summary of both polar cases and clinical cases of hypervitamintosis A.
Carrington-Smith, D. Mawson and Mertz: a re-evaluation of their ill-fated mapping journey during the 1911–1914 Australasian Antarctic Expedition. Med. J. Australia, 183 (2005) 638-641 <https://www.mja.com.au/public/issues/183_11_051205/car10291_fm.html>
=Levels of Vitamin A in Arctic Animals=
=Levels of Vitamin A in Arctic Animals=
Some references I need to look up:
Some references I need to look up:
Feeney RE. Polar journeys: the role of food and nutrition in early exploration. Washington, DC: American Chemical Society, and Fairbanks: University of Alaska Press, 1997.
Lewis, R. W., and J. A. Lentfer. 1967. The vitamin A content of polar bear liver: range
Lewis, R. W., and J. A. Lentfer. 1967. The vitamin A content of polar bear liver: range
Russell, F. E. 1967. Vitamin A content of polar bear liver. Toxicon 5:6162
Russell, F. E. 1967. Vitamin A content of polar bear liver. Toxicon 5:6162
Southcott R, Chesterfield N, Lugg D. Vitamin A content in the livers of huskies and some seals from Antarctic and subantarctic regions. Med J Aust 1971; 1: 311-313.