. The Biochemical journal, 1917. Biochemistry. Cliart XI. Curves 1-4. Basal diet -I- acetonc-insuliililc phosphotungstic acid prt-cipitate fraction corresponding to 10 % "; Curves 0-8. Basal diet -I- acetone-soluble phosphotungstic acid precipitate fraction corresponding to 10 *^(, "â ; 2. Basic lead acetate precipitation of yeast extracts. A 10% solution of "marmite" gave an exceedingly bulky fiocculent precipitate upon the addition of basic lead acetate solution. After removing this precipitate and subjecting it to a thorough washing, both precip
. The Biochemical journal, 1917. Biochemistry. Cliart XI. Curves 1-4. Basal diet -I- acetonc-insuliililc phosphotungstic acid prt-cipitate fraction corresponding to 10 % "; Curves 0-8. Basal diet -I- acetone-soluble phosphotungstic acid precipitate fraction corresponding to 10 *^(, "â ; 2. Basic lead acetate precipitation of yeast extracts. A 10% solution of "marmite" gave an exceedingly bulky fiocculent precipitate upon the addition of basic lead acetate solution. After removing this precipitate and subjecting it to a thorough washing, both precipitate and filtrate were decomposed by sulphuretted hydrogen gas, the lead-free solutions being neutralised and concentrated at low temperature and diminished pressure. Little growth promoting power was observed in either fraction (Chart XII), it being considered probable that the heavy and fiocculent nature of the lead sulphide precipitates had resulted in practically complete adsorption and loss of the active Chart XII. Curves 1-3. Basal diet -I- lead acetate filtrate fraction corresponding to 6 % "; Curves 4-6. Basal diet + lead acetate precipitate fraction corresponding to 6% "marmitt\" Curves 7-9. Basal diet + lead acetate filtrate fraction representing 6 % dialvsed "; Curves 10 and 11. Basal diet + lead acetate precipitate fraction representing 0 % dialvsed "; x indicates the time at which the addition of 0 % "marmite" to the diet was Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Biochemical Society (Great Britain); University of Liverpool. Biochemical Dept. London [etc. ] Cambridge University Press
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