X-Message-Number: 22472
Date: Fri, 5 Sep 2003 21:39:40 -0700 (PDT)
From: Doug Skrecky <>
Subject: 102'nd update on fly longevity experiments
This is the 102'nd update of my fly longevity experiments. Average
temperature was 23.3 C during this run. Estimated maximal longevity using
the formula (363 - T*11.2) is 102 days.
Starting with this run, dark storage conditions are standard. Here I
reexamine at higher doses oxymol, and sour cherry syrups, as well as take
a first look at raspberry syrup. Oxymol has previously improved survival
at a 2 teaspoon dose in run #98, and sour cherry was beneficial at 1 tsp
in run #93.
Oxymol this time yielded only a modest advantage at a 2 tsp dose, late
in the experiment. Higher doses proved to be toxic. Sour cherry was also
helpful at a 2 tsp dose, but 4 tsp was toxic. Raspberry was also slightly
beneficial at the lower doses. In all these cases there appears to be a
narrow therapeutic range, with effective doses becoming rapidly toxic at
higher doses. [However the remaining raspberry syrup did prove to be
delicious.]
Starting with the next run I'll be testing the effect of raw vegetable
extracts found at local supermarkets.
Run #102 Percent Survival on Day
supplement 5 10 15 21 26 31 38 44 49 54 60 66
________________________________________________________________
control one 100 100 92 92 92 77 62 15 0 - - -
control two 94 94 94 69 69 63 31 19 19 6 6 0
oxymol 2 tsp 100 92 92 83 75 67 50 38 33 17 0 -
oxymol 4 tsp 96 87 87 83 78 70 39 4 0 - - -
oxymol 6 tsp 94 94 88 69 63 50 13 0 - - - -
raspberry syrup 2 tsp 100 95 95 90 90 71 57 33 24 5 0 -
raspberry syrup 4 tsp 100 100 96 96 91 91 57 30 17 0 - -
raspberry syrup 6 tsp 100 100 100 94 89 44 6 0 - - - -
sour cherry syrup 2 tsp 100 95 95 95 95 89 63 53 21 11 0 -
sour cherry 4 tsp 100 100 100 100 95 84 32 5 5 0 - -
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