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  • 1995-1999  (4)
  • Antagonists  (2)
  • Biochemistry and Biotechnology  (1)
  • Key words. Porous medium, torsional oscillation of a disk.  (1)
Datenquelle
Materialart
Erscheinungszeitraum
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Diversity of potential microbial parasites colonizing sclerotia of Macrophomina phaseolina in soil (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 136-140 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Key wordsMacrophomina phaseolina ; Antagonists ; Germination ; Agglutination ; Pseudomonas fluorescence ; Trichoderma harzianum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract The colonization of Macrophomina phaseolina sclerotia by microbial parasites was evaluated in unsterilized field soil at different levels of soil moisture (0, –5, and –10 kPa) and temperature (20, 30, and 40°C). The maximum colonization of sclerotia was recorded in soil held at –5 or –10 kPa at 30–40°C. Trichoderma harzianum isolate 25–92 and Pseudomonas fluorescens isolate 4-92 were recorded as potential sclerotial parasites, and they significantly (P=0.05) reduced the germination of sclerotia by 60–63%. Cells of P. fluorescens and buffer-washed conidia of T. harzianum were completely agglutinated at 28°C with crude agglutinin of M. phaseolina. The ability of different antagonists to parasitize the sclerotia were correlated with the agglutination ability of the antagonists.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00384445
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Diversity of potential microbial parasites colonizing sclerotia of Macrophomina phaseolina in soil (1996)
    Springer
    Biology and fertility of soils 22 (1996), S. 136-140 
    Details
    ISSN: 1432-0789
    Schlagwort(e): Macrophomina phaseolina ; Antagonists ; Germination ; Agglutination ; Pseudomonas fluorescence ; Trichoderma harzianum
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract The colonization of Macrophomina phaseolina sclerotia by microbial parasites was evaluated in unsterilized field soil at different levels of soil moisture (0,-5, and-10 kPa) and temperature (20, 30, and 40°C). The maximum colonization of sclerotia was recorded in soil held at-5 or-10 kPa at 30–40°C. Trichoderma harzianum isolate 25–92 and Pseudomonas fluorescens isolate 4–92 were recorded as potential sclerotial parasites, and they significantly (P=0.05) reduced the germination of sclerotia by 60–63%. Cells of P. fluorescens and buffer-washed conidia of T. harzianum were completely agglutinated at 28°C with crude agglutinin of M. phaseolina. The ability of different antagonists to parasitize the sclerotia were correlated with the agglutination ability of the antagonists.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00384445
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 3
    Digitale Medien
    Digitale Medien
    Flow in a porous medium induced by torsional oscillation of a disk near its surface (1999)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 50 (1999), S. 529-545 
    Details
    ISSN: 0044-2275
    Schlagwort(e): Key words. Porous medium, torsional oscillation of a disk.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Physik
    Notizen: Abstract. Torsional oscillation of an infinite disk in a viscous liquid bounded by a porous medium fully saturated with the liquid has been discussed. It is assumed that the flow between the disk and the porous medium is governed by Navier-Stokes equation and that in the porous medium by Brinkman equation. Flows in the two regions are matched at the interface by assuming that the velocity and stress components are continuous at it. It is found that the depth of penetration of the flow in the porous medium is proportional to the square root of the permeability of the medium. The oscillation of the disk induces a steady radial-axial flow in both the regions in such a way that there is a steady axial flow of the fluid from the porous medium to the free flow region i.e. the fluid is expelled out from the porous medium. The steady flow in the porous medium increases with the increase of the permeability of the medium and with the decrease of the distance between the oscillating disk and porous surface.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s000330050164
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Representation of culture transition states in A. suboxydans (1998)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 73 (1998), S. 23-30 
    Details
    ISSN: 0268-2575
    Schlagwort(e): vitamin C ; structured mathematical model ; continuous culture kinetics ; sorbose ; sorbitol ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The kinetics of the biotransformation of D-sorbitol to L-sorbose by Acetobacter suboxydans (NRRL B-72) features both substrate and product inhibition. Model-based reactor operating strategies can eliminate the inhibitions and improve the yield and productivity of the fermentation. Unstructured models are usually unable to acknowledge complex intracellular physiological changes and therefore their application to dynamic growth conditions is limited. By considering RNA as a bottleneck growth limiting compound a structured mathematical model was developed to describe the transient growth of Acetobacter suboxydans. The model parameters were determined by a non-linear regression technique which minimized the deviation between the model prediction and the experimental (extracellular and intracellular) continuous culture data. The model was used to simulate the transient culture behaviour during the step-down in the dilution rates (from 0·1 h-1 to 0·05 h-1) in the continuous culture experiments. The experimental results and the model simulation results showed reasonable agreement. © 1998 Society of Chemical Industry
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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