1933
DOI: 10.1111/j.1469-185x.1933.tb01086.x
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Growth Factors of Lower Organisms

Abstract: Summary. The foregoing article is an attempt to give a general account of the growth factors of lower organisms, i.e. the substances which must be supplied in addition to food materials of known composition in order that normal growth can occur. As regards the growth factors required by lower organisms, the number of cases to which such a strict definition can be applied is limited to a few, and it has been necessary to include discussion of factors of which the indispensable nature is uncertain. In the case o… Show more

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Cited by 22 publications
(6 citation statements)
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“…In general, inositol and vitamin B, appear to be two of the most important growth factors, and are essential for the normal development of many fungi and bacteria, not all of which can synthesize them (cf. the review by Peskett, 1933). According to Kogl and Fries (1937), Polystictus adustus is dependent on the addition of vitamin B, to a synthetic medium, and Nematospora gossypii requires biotin.…”
Section: (C) Growth Stimulation By Complex Metabolic Productsmentioning
confidence: 99%
“…In general, inositol and vitamin B, appear to be two of the most important growth factors, and are essential for the normal development of many fungi and bacteria, not all of which can synthesize them (cf. the review by Peskett, 1933). According to Kogl and Fries (1937), Polystictus adustus is dependent on the addition of vitamin B, to a synthetic medium, and Nematospora gossypii requires biotin.…”
Section: (C) Growth Stimulation By Complex Metabolic Productsmentioning
confidence: 99%
“…Thus the Marmite litmus milk culture especially often showed in unclotted cultures a bright red colour, apparently indicating an acidity greater than that at which clotting began in plain litmus milk. Conversely, clotting * The difficult problem of bacterial growth factors has been admirably reviewed by Peskett (1933) and by Knight (1936). frequently took place in the N.T.R.D. autolysate media at apparent acidities which did not produce clotting in litmus milk.…”
Section: The Unreliability Of Litmus As An Indicator In Milkmentioning
confidence: 99%
“…These are critically discussed in the reviews of PESKETT (7) and of KOSER and SAUNDERS (4). The main points listed in their reviews were considered in the conduction of the following series of tests.…”
Section: General Proceduresmentioning
confidence: 99%