Record nummer 104254
Titel Onderzoekingen over de aerobe celluloseontleding in den grond
toon extra info.
door Georg Wilhelm Harmsen
Auteur(s) Harmsen, G.W.
Uitgever Groningen : Wolters
Jaar van uitgave 1946
Pagina's VIII, 229 p., 18 p. pl ill
Annotatie(s) Proefschrift Wageningen
Tutor(s) Smit, Prof. Dr. J.
Promotiedatum 1946-06-26
Proefschrift nr. 137
Samenvatting door auteur toon abstract
Harmsen detected and isolated nearly all of the microbes previously mentioned in the literature: 1. The Cellvibrio group did not form a unit but only represented cellulose-decomposing strains within a large morphological group; 2. The Cytophaga group was mainly dependent upon cellulose as a foodstuff; 3. Polyangides, belonging to the Myxobacteriaceae; 4. Bacilli were not strictly specific cellulose-decomposers although some strains preferred cellulose to soluble carbohydrates; 5. Actinomycetes were the chief cellulose-disintegrators in most soils; 6. Proactinomyces and Mycobacteria or Corynebacteria.

Harmsen also studied the distribution of cellulolytic microbes and their function in the soil. Nearly all groups of microbes appeared to play their special part in the decomposition of cellulose. The different groups formed a succession during decomposition. After manuring most soils with material rich in cellulose, only a few species proved quantitatively important (alkaline soils: actinomycetes cellvibrios or polyangides; acid soils: fungi).

On almost synthetic cellulose agar, many cellulolytic bacteria were markedly stimulated in their growth by extracts of plant or animal origin, by soil or by stable manure, and often by metabolic products of several other microbes. For this reason mutual stimulation, such as of celIvibrios by actinomycetes or of Cytophagae by Bacilli, was frequent in cellulose decomposition.

Online full text
Op papier Haal het document, vind aanverwante informatie of gebruik andere SFX-diensten
Trefwoorden (cab) bodembiologie / koolhydraten / degradatie
Rubrieken Bodemvruchtbaarheid
Publicatie type Proefschrift
Taal Nederlands
Er zijn nog geen reacties. U kunt de eerste schrijven!
Schrijf een reactie

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.