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Experientia

, Volume 1, Issue 7, pp 219–229 | Cite as

Les tests microbiologiques pour la détermination des vitamines

  • W. H. Schopfer
Article
  • 16 Downloads

Summary

The qualities required by a microorganism to work as test object are studied, so as the utilized methods to measure development.

The different, watersoluble vitamins from the group B: thiamin, riboflavin, nicotinic acid, adermin (pyridoxin), pantothenic acid, β-alanin, biotin, p-aminobenzoic acid, mesoinositol, enable the creation of a useful test with a selected microorganism.

The problem of the vitaminic factors of the soil is one of those which can only be studied with help of microbiological tests. The presence of vitamins in the soil is proved. Their origin is discussed. Their action and that of vitamins voluntary added to the soil is studied. It is shown that the qualities of soil and manures have a marked influence on the thiamin rate of the studied plant.

A cycle is suggested to show how the action of growth factors enable to understand the natural relations existing between the auxo-heterotrophic and the auxo-autotrophic organisms. The growth factors of the soil participate to the biological balance ruling life in and on the soil. The necessity of an “ecological vitaminology” is being considered.

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Copyright information

© Birkhäauser Verlag 1945

Authors and Affiliations

  • W. H. Schopfer
    • 1
  1. 1.Berne

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