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  1. No Access

    Article

    Morphological study of five bacteriophages of yellow-pigmented enterobacteria

    Two bacteriophages isolated onEnterobacter cloacae (C2, C2F) and three isolated onErwinia herbicola (E3, E16P, E16B) were purified by D2O gradient centrifugation. Phage-containing fractions were negatively staine...

    Francine Grimont, Patrick A. D. Grimont, P. du Pasquier in Current Microbiology (1978)

  2. No Access

    Article

    Growth parameters of Acinetobacter calcoaceticus on acetate and ethanol

    The growth parameters of Acinetobacter calcoaceticus, relevant to its mass cultivation on acetate and ethanol, were determined in batch and continuous culture experiments. Acetic acid exhibited a more powerful in...

    J. C. Du Preez, D. F. Toerien, P. M. Lategan in European journal of applied microbiology a… (1981)

  3. No Access

    Article

    Fermentation of D-xylose to ethanol by a strain ofCandida shehatae

    A strain ofCandida shehatae fermented 9% D-xylose directly to ethanol within 40 hours with a yield coefficient of 0.29. The specific rate of ethanol production attained a maximum value of 0.28 g ethanol (g cells ...

    J. C. du Preez, J. P. van der Walt in Biotechnology Letters (1983)

  4. No Access

    Article

    Utilization of glucose and cellobiose by Candida wickerhamii

    Candida wickerhamii produced ethanol under aerated and nonaerated conditions when grown on glucose but only under non-aerated conditions when grown on cellobiose. When the yeast was grown on 20 g·l−1 glucose in ...

    Stephanus G. Kilian, Bernard A. Prior… in European journal of applied microbiology a… (1983)

  5. No Access

    Article

    Two-dimensional analysis of gliadin proteins associated with quality in durum wheat: chromosomal location of genes for their synthesis

    Two-dimensional electrophoresis was used to fractionate the gliadin proteins from the endosperm of durum wheat. The increased resolution of the system, as compared with single-dimensional analysis, accentuated...

    D. L. du Cros, L. R. Joppa, C. W. Wrigley in Theoretical and Applied Genetics (1983)

  6. No Access

    Article

    Nutritional, temperature, pH, and oxygen requirements of Candida wickerhamii

    A defined growth medium was determined for the cellobiose fermenting yeast Candida wickerhamii. Biotin and calcium pantothenate were required for growth while thiamine stimulated growth and ethanol production. Th...

    Stephanus G. Kilian, Bernard A. Prior… in European journal of applied microbiology a… (1983)

  7. No Access

    Article

    A method for the detection of Issatchenkia orientalis in a baker's yeast factory

    A method for the detection of Issatchenkia orientalis (Candida krusei), a contaminant of bakers' yeast, is described. Nine different liquid medium types were compared and maximum specific growth rates for the yea...

    R. P. Tracey, H. J. J. van Vuuren, D. S. du Toit in Applied Microbiology and Biotechnology (1984)

  8. No Access

    Article

    The effect of aeration on xylose fermentation by Candida shehatae and Pachysolen tannophilus

    The ability of a Candida shehatae and a Pachysolen tannophilus strain to ferment D-xylose to ethanol was evaluated in defined and complex media under different levels of aeration. Aeration enhanced the ethanol pr...

    J. C. du Preez, B. A. Prior, Aida M. T. Monteiro in Applied Microbiology and Biotechnology (1984)

  9. No Access

    Article

    Somatic embryogenesis and plant regeneration in callus from inflorescences of Hordeum vulgare X Triticum aestivum hybrids

    Embryogenic callus cultures were obtained by culturing young inflorescence tissues of Hordeum vulgare cv. ‘PF51811’ (2x)XTriticum aestivum cv. ‘Chinese Spring’ (6x) hybrids on 2,4-D-containing N6 medium. After su...

    C. C. Chu, C. S. Sun, X. Chen, W. X. Zhang, Z. H. Du in Theoretical and Applied Genetics (1984)

  10. No Access

    Article

    A quantitative screening of some xylose-fermenting yeast isolates

    A quantitative screening procedure for xylose fermentation was conducted on 56 yeast isolates. Several of the isolates were found to be markedly superior toC. shehatae CSIR-Y492, one of the better xylose-fermenti...

    J. C. du Preez, B. A. Prior in Biotechnology Letters (1985)

  11. No Access

    Article

    The fermentation of hexose and pentose sugars by Candida shehatae and Pichia stipitis

    The fermentation by Candida shehatae and Pichia stipitis of xylitol and the various sugars which are liberated upon hydrolysis of lignocellulosic biomass was investigated. Both yeasts produced ethanol from d-gluc...

    J. C. du Preez, M. Bosch, B. A. Prior in Applied Microbiology and Biotechnology (1986)

  12. No Access

    Article

    A versatile assay for total cellulase activity using U-[14C]-labelled bacterial cellulose

    A versatile and sensitive assay for total cellulase activity and not just carboxymethylcellulase activity, is described. The method is equally suitable for studying the kinetics of solubilization of cellulose ...

    Patricia du Preez, A Kistner in Biotechnology Letters (1986)

  13. No Access

    Article

    Temperature profiles of growth and ethanol tolerance of the xylose-fermenting yeasts Candida shehatae and Pichia stipitis

    The effect of different ethanol concentrations on the growth of Candida shehatae and Pichia stipitis with xylose as substrate was evaluated in a temperature gradient incubator. The upper limit of the temperature ...

    J. C. du Preez, M. Bosch, B. A. Prior in Applied Microbiology and Biotechnology (1987)

  14. No Access

    Article

    The oxygen requirements of yeasts for the fermentation of d-xylose and d-glucose to ethanol

    The effect of oxygen availability on d-xylose and D-glucose metabolism by Pichia stipitis, Candida shehatae and Pachysolen tannophilus was investigated. Oxygen was not required for fermentation of d-xylose or d-g...

    Magdalena E. Ligthelm, Bernard A. Prior… in Applied Microbiology and Biotechnology (1988)

  15. No Access

    Article

    The induction of D-xylose catabolizing enzymes inPachysolen tannophilus and the relationship to anaerobic D-xylose fermentation

    Aerobic cultures harvested from the lag and early exponential growth phases fermented D-xylose poorly under anaerobic conditions whereas fermentation by late exponential and stationary phase cultures was rapid...

    Magdalena E. Ligthelm, Bernard A. Prior, James C. du Preez in Biotechnology Letters (1988)

  16. No Access

    Article

    An investigation of d-{1-13C} xylose metabolism in Pichia stipitis under aerobic and anaerobic conditions

    The uptake of d-{1-13C} xylose, the accumulation of intermediates and the distribution of the label in ethanol in Pichia stipitis under aerobic and anaerobic conditions were investigated by nuclear magnetic reson...

    Magdalena E. Ligthelm, Bernard A. Prior… in Applied Microbiology and Biotechnology (1988)

  17. No Access

    Article

    The effect of respiratory inhibitors on the fermentative ability of Pichia stipitis, Pachysolen tannophilus and Saccharomyces cerevisiae under various conditions of aerobiosis

    The growth and ethanol production by the d-xylose-fermenting yeasts Pichia stipitis and Pachysolen tannophilus under various conditions of aerobiosis responded similarly to the addition of the respiratory inhibit...

    Magdalena E. Lighthelm, Bernard A. Prior… in Applied Microbiology and Biotechnology (1988)

  18. No Access

    Article

    The relation between redox potential and D-xylose fermentation by Candida shehatae and Pichia stipitis

    Fed-batch xylose fermentations with the yeastsCandida shehatae andPichia stipitis were conducted, using stirrer speed variation with the redox potential as control index to maintain oxygen-limited conditions. The...

    J. C. du Preez, B. van Driessel, B. A. Prior in Biotechnology Letters (1988)

  19. No Access

    Article

    Ethanol tolerance of Pichia stipitis and Candida shehatae strains in fed-batch cultures at controlled low dissolved oxygen levels

    Fed-batch cultivations of Pichia stipitis and strains of Candida shehatae with d-xylose or d-glucose were conducted at controlled low dissolved oxygen tension (DOT) levels. There were some marked differences betw...

    J. C. du Preez, B. van Driessel, B. A. Prior in Applied Microbiology and Biotechnology (1989)

  20. No Access

    Article

    D-xylose fermentation by Candida shehatae and pichia stipitis at low dissolved oxygen levels in fed-batch cultures

    The fermentation of D-xylose byCandida shehatae andPichia stipitis was studied in fed-batch fermentations using dissolved oxygen tension (DOT) control in the range of 0.2 to 1.4% air saturation. The response of t...

    J. C. du Preez, B. van Driessel, B. A. Prior in Biotechnology Letters (1989)

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