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Chick feeding tests on treated tung meals
Author(s) -
Holmes R. L.,
Spadaro J. J.,
Watts A. B.
Publication year - 1967
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02908375
Subject(s) - meal , ammonia , phosphoric acid , chemistry , urea , food science , zoology , biology , biochemistry , organic chemistry
In attempts to detoxify tung meal, batches were treated with gaseous ammonia at 100 psi at room temp and at 110C, also at 110C with phosphoric acid, with sodium carbonate, and with urea, and by benzene extraction. The analyses of the meals for total, ammonia and nonprotein nitrogen, and for pH are given. The treated meals were fed to chicks by replacing half the protein in a standard chick ration by protein from the tung meals. All treatments except benzene extraction greatly reduced toxicity of the meal, but no ration containing tung meal was equal to the standard chick ration in its effect on rate of growth. The best meal was that treated with ammonia. The average gain in weight of chicks in 21 days (15th to 36th day) on the ration containing this meal was 247 g compared to 325 g for the chicks on the standard ration. None of the rations containing treated meals killed any chicks except the benzene‐extracted meal. The untreated meal killed 23 out of 40 chicks and the survivors gained only 88 g in 21 days.