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  • 1
    Publication Date: 1962-12-01
    Print ISSN: 0021-8847
    Electronic ISSN: 2056-5232
    Topics: Biology
    Published by Wiley
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  • 2
    Publication Date: 1971-01-01
    Print ISSN: 0233-111X
    Electronic ISSN: 1521-4028
    Topics: Biology
    Published by Wiley
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  • 3
    Publication Date: 1971-06-01
    Print ISSN: 0021-8847
    Electronic ISSN: 2056-5232
    Topics: Biology
    Published by Wiley
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 5 (1989), S. 67-76 
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé 43 souches de bactéries cellulolytiques Gram-négatives, mésophiles, non-sporulantes, et anaérobies ont été isolées à partir (A) d'un réacteur anaérobie traitant l'eau résiduaire d'une usine intégrale de pâte à papier et (B) de digesteurs anaérobies de boues d'égout. Ces souches ont été étudiées quant à leurs propriétés de fermenter les hydrates de carbone et quant à leurs produits de fermentation. Des techniques numériques ont permis de classer 22 de ces souches dans deux groupes: le groupe A (10 souches) et le groupe B (12 souches). Les souches appartenant au groupe A dégradaient le papier filtre en 2 à 7 jours. Elles se présentaient sous la forme de longs bâtonnets curvilignes et ressemblaient àBacteroides cellulosolvens et àAcetivibrio cellulolyticus. Le metabolite majeur était l'acide acétique. Elles produisaient aussi de l'éthanol, de l'iso-butanol, et des acides pyruvique et lactique. Les souches appartenant au groupe B dégradaient le papier filtre en 4 à 5 semaines. Elles se présentaient sous la forme de bâtonnets courts et produisaient, comme métabolites, les acides propionique, lactique, succinique et acétique. Les 21 souches restantes dégradaient le papier filtre en 2 à 5 semaines. Elles présentaient des profils de fermentation variables tant en ce qui concernait les hydrates de carbone fermentés que les produits finaux. A part une souche qui présentait une similitude évidente avecButyrivibrio fibrisolvens, ces souches différaient de façon marquée d'avec les souches de référence du rumen.
    Notes: Summary Forty-three isolates of Gram-negative, mesophilic, non-spore-forming anaerobic cellulolytic bacteria were obtained from (i) an anaerobic reactor treating waste water from an integrated paper mill and (ii) an anaerobic sewage-sludge digestor. These isolates were studied for carbohydrate fermentation and fermentation products. By numerical techniques, 22 isolates could be placed in two groups: group A (10 isolates) and group B (12 isolates). The isolates belonging to group A showed degradation of filter paper in 2–7 days. They were slightly-curved long rods and similar toBacteroides cellulosolvens andAcetivibrio cellulolyticus. Acetic acid was produced as major product. The bacteria also produced ethanol, isobutanol, pyruvic and lactic acids. Group B strains degraded filter paper in 4–5 weeks. They were short rods and produced propionic, lactic, succinic and acetic acids as fermentation products. The remaining 21 isolates could disintegrate filter paper in 2–5 weeks. They showed variable fermentation patterns, both as to fermentable carbohydrates and end products. Except for one isolate, which showed obvious similarity toButyrivibrio fibrisolvens, the isolate differed distinctly from reference strains of ruminai origin.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Quantitative microbiology 1 (1999), S. 7-28 
    ISSN: 1572-9923
    Keywords: bayesian predictive probabilities ; classification ; Enterobacteriaceae ; predictive fit ; self-organizing artificial intelligence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We present a method for building systematics when new knowledge is continuously accumulated. The resulting classification is self-correcting and improves itself by sorting new items as they are added to the material and studied. The formulation is based on Bayesian predictive probability distributions. A new item that has not yet been classified is assigned to the class that has maximal posterior probability or is made to form a group of its own. Such a cumulative classification depends on the order in which the items are classified. The introduction of an already classified training set considerably improves the repeatability of the method. As a case study we applied the method to a large data set for the Enterobacteriaceae. The resulting classifications corresponded well to the general structure of the prevailing taxonomy of Enterobacteriaceae.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Antonie van Leeuwenhoek 37 (1971), S. 489-496 
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During iron oxidation,Thiobacillus ferrooxidans (Ferrobacillus ferrooxidans) was able to tolerate high concentrations of Zn, Ni, Cu, Co, Mn and Al (more than 10 g/litre). Silver and anions of tellurium, arsenic and selenium were toxic in concentrations of 50–100 mg/litre. Molybdenum (as molybdate), at concentrations above 5 mg/litre, was lethal toT. ferrooxidans. During thiosulphate oxidation, the tolerance to Zn, Ni and Co was greatly reduced, cobalt now being at least 2000 times more toxic, and the inhibitory levels of Zn and Ni being 600 mg Zn/litre and 150 mg Ni/litre. During sulphur oxidation, the tolerance to heavy metals extended to concentrations above 5 g/litre. Adaptation to Zn, Ni or Cu during iron oxidation was found to result in increased tolerance to some of the other metals also.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 13 (1971), S. 517-527 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effect of inorganic nutrients on iron oxidation by Thiobacillus ferrooxidans was studied using a concentration of 2.0 g Fe2+/liter. Besides ammonium-nitrogen and phosphorus, the essential nutrients were sulphate and magnesium, with the lowest unlimiting concentration being 2.0 g SO2-4/liter and 2.0 mg Mg2+/liter for a suspension of about 108 cells/ml. Omitting nitrate, calcium, potassium, and chloride had no influence on the iron oxidation. Nitrate and chloride were inhibitory in high concentrations although the bacteria were able to adapt to their presence. Several organic compounds tested in 0.5% (w/v) concentrations inhibited iron oxidation. Complete inhibition up to 14 days was caused by fructose, lactose, meat extract, yeast, extract, peptone, and tryptone. T. ferrooxidans-strains were able to adapt to the presence of organic material even though they were not necessarily able to use the organic compounds for energy. Some general conclusions are made concerning the role of nutrients in leaching processes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 757-763 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A mathematical model for the prediction of product formation in batch processes is presented. The suggested procedure allows production of a prognose at any given moment of a run concerning the product concentration at any future moment of the same experiment. The series of subsequent prognoses thus produce a trend, and it is assumed that an analysis of the trend may provide information, which is useful in the evaluation of different decision alternatives in pilot plant batch experiments.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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