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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 1 (1985), S. 163-172 
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé La croissance de neuf souches appartenant à quatre éspèces différentes deRhizobium (R. leguminosarum, R. meliloti, R. phaseoli etR. japonicum) a été étudiée avec des milieux contenant, comme source d'azote et de facteurs de croissance, un extrait de germes de malt (MSE) au lieu d'extrait de levure (YE). Les résultats obtenus en culture discontinue (batch) montrent que toutes les souches poussent bien en milieu MSE. Dans la cas des souches à croissance rapide, la biomasse augmente proportionnellement à la concentration de MSE dans le milieu. Par contre, pour les souches à croissance lente, commeR. japonicum, la croissance est complètement inhibée lorsque la concentration en MSE (contenant 3.75% w/v de solides) atteint 40% (v/v). Avec toutes les souches, on obtient une concentration en cellules supérieure à 5×109/ml, ce qui indique clairement que le MSE convient bien et peut être utilisé à la place de YE. Les expériences réalisées en culture continue montrent qu'on peut obtenir avec le milieu MSE une productivité en cellules très élevée (15.3×108 cellules/ml/h.).
    Abstract: Resumen Se estudió el crecimiento de nueve cepas de cuatro especies diferentes deRhizobium (R. leguminosarum, R. meliloti, R. phaseoli y R. japonicum) en medios de cultivo conteniendo extracto de raíz de malta (ERM), en reemplazo de extracto de levaduras (EL), como fuente de nitrógeno y factores de crecimiento. Los resultados obtenidos en cultivos en batch indicaron que todas las cepas crecieron bien en los medios con ERM. En el caso de las cepas de crecimiento rápido la biomasa se incrementó con la concentración de ERM en el medio de cultivo, pero con las cepas de crecimiento lento(R. japonicum) el desarrollo celular se inhibió completamente para concentraciones de ERM (conteniendo 3,75% p/v de sólidos) de 40% v/v. Con todas las cepas empleadas la concentración celular alcanzada fue superior a 5×109 cél/ml, lo que indica claramente que el ERM es un adecuado componente para los medios de cultivo que puede reemplazar al EL. Los resultados de los experimentos realizados en sistema continuo mostraron que se puede alcanzar una alta productividad (15,3×108 cél/ml/h) utilizando un medio de cultivo suplementado con ERM.
    Notes: Summary The growth of nine strains of four different species ofRhizobium (R. leguminosarum, R. meliloti, R. phaseoli andR. japonicum) was studied with media containing malt sprouts extract (MSE), in place of yeast extract (YE), as source of nitrogen and growth factors. The results obtained in batch cultures indicated that all the strains grew well in MSE medium. In the case of fast-growing strains the biomass increased with increase in the concentration of MSE in the medium, but with the slow-growing strains, likeR. japonicum, growth was inhibited completely by using a concentration of MSE (containing 3.75% w/v of solids) of 40% v/v. With all the strains the concentration of cells attained was greater than 5×109 cells/ml, which clearly indicates that MSE is a suitable component of media, and one which can be used instead of YE. The results of continuous culture experiments showed that a high productivity of cells (15.3×108 cells/ml/h) could be obtained using MSE medium.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé On a étudié l'influence de diverses sources d'azote organique et inorganique et des rapports C∶N en relation avec la croissance et la production de protéine parBacillus thuringiensis var.israelensis. On fait l'hypothèse que la production de protéines est proportionnelle à la production de delta-endotoxine. La concentration de delta-endotoxine croît quand on ajoute au milieu du (NH4)2SO4, mais le rapport delta-endotoxine: poids sec de biomasse n'est pas affecté par différents rapports C∶N. On peut remplacer partiellement la source organique d'azote, l'extrait de levure, par du (NH4)2SO4 avec une augmentation significative de production de delta-endotoxine.
    Notes: Abstract The influence of different organic and inorganic nitrogen source combinations and C∶N ratios was studied in connection with growth and protein production ofBacillus thuringiensis var.israelensis. Protein production was assumed to be proportional to delta-endotoxin production. Delta-endotoxin concentration increased when media were supplemented with (NH4)2SO4, but the delta-endotoxin: biomass dry weight ratio was unaffected by different C∶N ratios. Organic nitrogen source, yeast extract, could be partially replaced by (NH4)2SO4 with a significant increase in delta-endotoxin production.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 7 (1985), S. 607-610 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The influence of temperature on solvent production from whey was investigated by using strains ofClostridium acetobutylicum andbutylicum. Higher yields of solvents were observed at 37°C or at 30°C depending on the strain used.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 7 (1985), S. 43-46 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The use of apple pomace for butanol production was studied by employing strains ofClostridium acetobutylicum andbutylicum. Yields of butanol between 1.9 and 2.2 % of fresh apple pomace are reported.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 9 (1987), S. 421-424 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Corn steep and malt-sprouts were used to replace yeast extract in solvents production from whey at 30°C and 37°C employing two clostridia producer strains. The results show different temperature and growth factors dependence in the two strains. Yields of solvents between 0.16 and 0.32 (g/g) were obtained.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Biotechnology letters 8 (1986), S. 247-252 
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A low-grade mineral residue was used for studying the solubilization of phosphorus by four strains of bacteria. The percentage of solubilization attained varied according to the strains and concentration of mineral used. APseudomonas sp. was particularly suitable for attaining about 50% of solubilized phosphorus, when 1 g/1 of mineral was employed in the medium.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 409-416 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A Micrococcus cerificans strain was grown on simple media with n-hexadecane or gas oil as sole carbon sources. Samples of cellular material recovered from hexadecane or gas oil fermentations do not appear to differ significantly in their composition. The protein content varied from 68 to 75%. With the exception of sulfur amino acids the amino acid distribution compares favorably with the FAO standard reference protein.The biological value of cell protein recoveered from hexadecane fermentations was 67 (cascin, 70). In the case of gas oil grown cells, the cell material recovered had to be completely purified in order to improve its protein quality. After fully extraction of undersirable fraction with petroleum ether in a Soxhlet apparatus the biological value observed was 63.
    Additional Material: 1 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 7 (1965), S. 309-319 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pseudomonas aeruginosa NCTC 5940 was grown in an aerated mineral salts medium with pure octadecane as sole carbon source, both in batch and continuous culture experiments. Carbon and nitrogen balances were made under different conditions. It was found that the only significant products were fresh cell tissue and carbon dioxide, although traces of several fatty acids were detected.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 7 (1965), S. 321-322 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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