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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 90 (1973), S. 263-268 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The oxidation of formaldehyde to carbon dioxide in cell-free extracts of methanol-grown Candida boidinii has been investigated. A specific NAD-dependent formaldehyde dehydrogenase requiring reduced glutathione has been partially purified. Furthermore, a NAD-linked formate dehydrogenase was found in cell-free extracts. The synthesis of these two enzymes is induced by methanol and repressed by glucose. The possible significance of these enzymes in the energy-generating system is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 87 (1972), S. 249-256 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary With growing cells of a Nocardia sp., isolated from soil, the degradation of 5-pregnene-3β, 20β-diol into 3-[5-oxo-7aβ-methyl-1β (1′β-hydroxo)-ethyl-3aα-perhydroindane-4α]-propionic acid was investigated. The results show that iron is essential for production of the perhydroindanpropionic acid, that this production is greatly enhanced by the presence of calcium and that it is maximal in the pH range 7.0–7.5.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 97 (1974), S. 163-168 
    ISSN: 1432-072X
    Keywords: Candida boidinii ; Methanol ; Assimilation ; Incorporation of ; Formaldehyde ; Ribose-Phosphate-Cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Hexose phosphate synthetase activity was found in cell-free extracts of methanol-grown Candida boidinii. Incubation of this crude extract with 14C-formaldehyde and D-ribose-5-phosphate leads to incorporation of radioactivity into fructose-and glucose phosphates. Cells grown on glucose lack the hexose phosphate synthetase activity. No hydroxypyruvate reductase activity, the key enzyme of the serine pathway was found. These results indicate that during growth of C. boidinii on methanol, cell constituents are made by a sugar phosphate pathway similar in concept, if not in absolute molecular detail, to the ribose phosphate cycle in C1-metabolizing bacteria.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 84 (1972), S. 29-42 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Aus einer Bodenprobe wurde eine Hefe, Candida boidinii, isoliert, welche auf Methanol als einziger C-Quelle wachsen kann. Als Wachstumsfaktor benötigt dieser Hefestamm Biotin in sehr geringer Konzentration. Unter günstigen Kulturbedingungen beträgt die Zellausbeute pro 1000 ml Kulturmedium 2,3g Trockenmasse bei Zugabe von 1% (v/v) Methanol, und 8,3g bei 4% Methanol. Das Wachstum wird bei Zusatz von 5% Methanol zum Minimalmedium vollständig gehemmt. Der Stamm verwertet Kohlenhydrate und Äthanol schneller als Methanol oder Milchsäure. Die Enzyme für den Methanol-Stoffwechsel scheinen jedoch konstitutiv zu sein. Die optimalen Kulturbedingungen für kurze Generationszeiten und hohe Zellausbeuten auf Methanol sind: 28°C, NH4 + als Stickstoffquelle und pH 5,0. Die Elementaranalyse ergab folgende Werte für die Zusammensetzung der Hefezellen: 42,81% C, 7,23% H und 5,54% N. Die Aminosäuren (in den Zellen) wurden mit dem Aminosäure-Analysator quantitativ bestimmt.
    Notes: Summary A yeast, Candida boidinii, isolated from soil, capable of growing on a medium containing methanol as the only carbon source is described. Biotin is required in very low concentration as a growth factor. In a study on the effect of the methanol concentration on the cell growth under favorable conditions, the cell yield was 2.3 g (dry weight) with 1% (v/v) methanol and 8.3 g with 4% methanol per 1000 ml of culture medium. However, the growth was inhibited by 5% methanol. The strain assimilated carbohydrate and ethanol faster than methanol or lactate. The enzymes for the methanol metabolism are probably constitutive. Optimal conditions for rapid growth and high cell yeild from methanol were found to be: 28°C, NH4 + as nitrogen source and pH 5.0. The cell composition was as follows: 42.81% C, 7.23% H and 5.54% N. Amino acids in the cells were analyzed by the amino acid autoanalyzer.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 669-676 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In einer ökonomischen Betrachtung wird Methanol als Substrat für die Produktion von Einzeller-Protein (SCP) mit anderen Rohstoffen an Hand von publizierten Daten verglichen. Die Kriterien sind einerseits der Preis des Substrates und andererseits die Substrat-Zellausbeute, der Sauerstoff-Bedarf und die Wärme-Entwicklung im Fermentationsprozeß. Weiterhin wird ein Überblick über methanol-verwertende Mikroorganismen und über die Kriterien für ihre Eignung zur SCP-Produktion gegeben. Bei der Hefe Candida boidinii wurde der Methanol-Stoffwechsel untersucht und mit dem von Bakterien verglichen. Methanol wird wie bei Bakterien über Formaldehyd und Formiat zu CO2 oxidiert. Das C1-Substrat scheint bei Hefen über einen Zucker-phosphat-Weg assimiliert zu werden, der ähnlich dem Ribose-phosphat-Weg in Bakterien ist. Das Problem der Prozeßtechnik wird unter dem Gesichtspunkt der Prozeßführung, Reaktortechnik und mathematischen Modellierung der Prozesse diskutiert.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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