X-Message-Number: 18221
Date: Sun, 23 Dec 2001 18:00:25 -0800 (PST)
From: Doug Skrecky <>
Subject: 54'th update on fly longevity experiments
This is the 54'th update of my fly longevity experiments. All bottles
contain 1/4 tsp citric acid as a standard additive. Recorded average
temperature during the experiment was 25.3 C.
In this experiment I seek to further examine rice products, as well as
soy protein. I did not expect rice bran to be beneficial since it contains
a lot of fat, and all tested fats have reduced fly longevity in published
experiments. However since rice polishings have at least some fat in them
I decided to test rice bran anyhow. A relatively new breeding bottle was
used, with a lot of young, fairly healthy flies.
Rice bran turned out to be positive early in the experiment, but
neutral later on. The early results could be due to chance. Rice
polishings and rice protein turned out to be beneficial only during the
first month. Soy protein
exerted a beneficial effect throughout the experiment. This is consistant
with a powerful protective effect against some viruses. However at the day
58 census, neither of the two remaining control flies could fly, while
several could still do so in some of the other bottles. Soy and rice may
exert a small retarding effect on motor neuron degeneration.
Run #54 Percent Survival on Day
supplement 4 9 14 20 26 33 42 47 52 58 64 70 74 79
___________________________________________________________________
control 100 83 80 77 77 70 43 33 17 7 0 - - -
rice bran 1 tsp 100 100 100 100 89 72 50 33 11 0 - - - -
rice polishings 1 tsp 93 93 87 87 87 67 40 40 20 7 7 0 - -
rice polishings 2 tsp 100 100 95 89 89 79 42 32 11 5 5 0 - -
rice protein 1 tsp 100 100 100 93 93 87 40 13 7 7 7 7 7 0
rice protein 2 tsp 92 92 92 92 75 67 50 42 8 0 - - - -
soy protein 1 tsp 91 91 91 91 82 82 64 36 36 18 18 9 0 -
soy protein 2 tsp 100 94 94 94 94 88 69 50 38 19 6 6 0 -
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