Action of Microorganisms on Bituminous Materials1: I. Effect of Bacteria on Asphalt Viscosity
AUTOR(ES)
Traxler, R. W.
RESUMO
Visual effects of Mycobacterium ranae on a 135-penetration asphalt (asphalt 1A) are described, which show the texture and rheological characteristics of the asphalt to be modified by microbial action. A bentonite-asphalt emulsion system for asphalts 1A, 3A, and 6A was used to subject these materials to the degradative activity of M. ranae and Nocardia coeliaca for 4 months at 30 C. N. coeliaca caused 1.5-, 3.9-, and 6.8-fold increases in relative viscosity of asphalts 1A, 3A, and 6A, respectively. A similar susceptibility pattern for M. ranae was obtained on the same asphalts, but apparently this organism exerted even a greater effect on asphalt 6A since the viscosity of this residue was too hard to be determined satisfactorily. Comparison of these data with analyses of the three asphalts indicates that the organisms probably attack the resin components of the asphalts.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1058358Documentos Relacionados
- THE ACTION OF MICROORGANISMS ON FATS I. : Oxygen Uptake by Bacteria in the Presence of Lipid Substrates1
- Effect of Naturally Occurring Xanthines on Bacteria: I. Antimicrobial Action and Potentiating Effect on Antibiotic Spectra
- Studies on the Action of Wetting Agents on Microörganisms: I. The Effect of pH and Wetting Agents on the Germicidal Action of Phenolic Compounds
- ACTION OF FORMALDEHYDE ON MICROORGANISMS I. : Correlation of Activity with Formaldehyde Metabolism
- LYSINE, METHIONINE AND TRYPTOPHAN CONTENT OF MICROORGANISMS I. Bacteria