X-Message-Number: 24793
Date: Mon, 11 Oct 2004 09:15:44 -0700 (PDT)
From: Doug Skrecky <>
Subject: 155'th update on fly longevity experiments
This is the 155'th update of my fly longevity experiments. Average
temperature was 27.6 C during this run. Estimated maximal longevity
using the formula (363 - T*11.2) is 54 days.
After testing purple sweet potato a few runs back, purple rice
extract also looked worth testing as well. This is commonly called
"black" rice since the purple color is so concentrated. A true black
sesame extract was tested as well since sesame has modestly increased
survival in "short-lived" mice. High molecular weight polyethylene glycol
also gets "the fly test", since this is known to offer powerful
protection against bacteria. COLD-FX is supposed to be helpful against
viruses.
Although PEG 10,000 is not supposed to be absorbable, the toxicity
of high dose PEG argues the opposite. Low dose PEG may have offered some
small net benefit to old flies. The modest performance of COLD-FX
suggests that virus infections might constitute only a minor threat to
fly survival. As expected both black rice, and black sesame extracts also
offered some small benefit.
Run #155 Percent Survival on Day
supplement 11 21 27 32 37 43 48 53 58 63
_________________________________________________
control one 93 82 71 46 25 11 7 0 - -
control two 97 92 92 81 70 35 14 3 0 -
black rice 12.5% 98 73 71 56 49 39 22 2 0 -
(hot water- 25% 97 88 82 77 74 50 38 9 0 -
extract) 50% 100 96 93 82 79 50 39 11 0 -
black sesame 12.5% 100 83 77 73 63 57 7 0 - -
(hot water- 25% 96 93 85 78 56 41 30 7 4 0
extract) 50% 94 94 77 71 53 53 24 18 0 -
PEG 10,000 1/8 tsp 100 97 77 56 44 27 21 12 3 0
PEG 10,000 1/2 tsp 59 56 52 33 15 15 11 0 - -
COLD-FX 50 mg 95 76 71 57 38 24 14 0 - -
COLD-FX 200 mg 96 82 75 64 46 36 21 7 0 -
COLD-FX 800 mg 100 82 71 64 46 36 32 4 0 -
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