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Effect of a Low Environmental Temperature on Weight and Food Consumption

机译：环境温度低对体重和食物消耗的影响

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Fifty young adult rats (220-300 gm.) were divided into two groups. Twenty-five were subjected to moderately severe cold (5℃);25 were maintained at 25℃. Each group was divided into 5 subgroups, which received a thiamine-deficient diet for 18 days supplemented with the following levels of thiamine:0.3 mcg./gm. diet, 0.4 mcg./gm., 0.5 mcg./gm., 0.6 mcg./gm., and 2.0 mcg./gm. Respective mean weight changes at these levels were:-69 gm., -55 gm., -51 gm., -18 gm., and +26 gm. for the cold rats;-89 gm., -71 gm., -49 gm., -37 gm., and +55 gm for the rats held at 25℃. Corresponding mean voluntary food intakes for the 18-day period were 253, 299, 304, 351, and 436 gm. for the rats at 5° C and 97, 100, 123, l43, and 284 gm. for the rats at 25℃. A statistical analysis indicated that there was no significant difference in weight response between the warm and cold rats at deficient levels of thiamine intake. The relation of weight changes to food intakes suggested that the cold rats used an approximately constant increment of food for their extra energy requirements in the cold.

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