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  • Articles  (5)
  • fungi  (4)
  • nitrogen
  • Springer  (5)
  • Oxford University Press
  • Process Engineering, Biotechnology, Nutrition Technology  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Pure and Binary Gas Adsorption Equilibria and Kinetics of Methane and Nitrogen on 4A Zeolite by Isotope Exchange Technique (1999)
    Springer
    Adsorption 5 (1999), S. 145-158 
    Details
    ISSN: 1572-8757
    Keywords: kinetics ; isotope-exchange ; nitrogen ; adsorption ; methane ; zeolite ; equilibria
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The Isotope Exchange Technique (IET) was used to simultaneously measure pure and binary gas adsorption equilibria and kinetics (self-diffusivities) of CH4 and N2 on pelletized 4A zeolite. The experiment was carried out isothermally without disturbing the adsorbed phase. CH4 was selectively adsorbed over N2 by the zeolite because of its higher polarizability. The multi-site Langmuir model described the pure gas and binary adsorption equilibria fairly well at three different temperatures. The selectivity of adsorption of CH4 over N2 increased with increasing pressure at constant gas phase composition and temperature. This curious behavior was caused by the differences in the sizes of the adsorbates. The diffusion of CH4 and N2 into the zeolite was an activated process and the Fickian diffusion model described the uptake of both pure gases and their mixtures. The self-diffusivity of N2 was an order of magnitude larger than that for CH4. The pure gas self-diffusivities for both components were constants over a large range of surface coverages (0 〈 θ 〈 0.5). The self-diffusivities of CH4 and N2 from their binary mixtures were not affected by the presence of each other, compared to their pure gas self-diffusivities at identical surface coverages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008917308002
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  • 2
    Electronic Resource
    Electronic Resource
    Recovery of fungi after storage for over a quarter of a century (1999)
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 517-519 
    Details
    ISSN: 1573-0972
    Keywords: Cryopreservation ; freeze-drying ; fungi ; oil storage ; silica gel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract This paper discusses the recovery of a sample of strains originally preserved on silica gel over the period 1970–1973. Fifty-three strains were tested of which 18 recovered, demonstrating survival for more than 20 years. The recovery of 26 of the strains is directly compared with that of replicates from oil storage and freeze-drying. A summary of storage of 421 strains by the silica gel technique is given, reporting survival of 64% for a quarter of a century or more. The technique is ideal for preserving sporulating fungi of the Ascomycota and many species of mitotic fungi for laboratories of limited facilities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008959521962
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  • 3
    Electronic Resource
    Electronic Resource
    Cryogenic light microscopy and the development of cooling protocols for the cryopreservation of filamentous fungi (1997)
    Springer
    World journal of microbiology and biotechnology 14 (1997), S. 49-57 
    Details
    ISSN: 1573-0972
    Keywords: Cooling rate ; cryogenic light microscopy ; cryopreservation ; exosmosis ; fungi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract One hundred and ninety five strains of fungi were observed during freezing and thawing using a cryogenic light microscope. There was no obvious link between taxonomic position and their morphological response to freezing and thawing. The viability of seven of these strains was examined following freezing and thawing in the presence or absence of the cryoprotectants glycerol and dimethyl sulphoxide. Intracellular ice and hyphal shrinkage were not necessarily lethal events, but in many cases they affected the rate and quality of growth. Both cryoprotectants reduced shrinkage, shifted the cooling rate where intracellular ice formed in many cases, and improved the recovery of strains. The results presented aid the development of successful cryopreservation protocols.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008820432471
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  • 4
    Electronic Resource
    Electronic Resource
    Fungal degradation of benzoic acid and related compounds (1993)
    Springer
    World journal of microbiology and biotechnology 9 (1993), S. 9-16 
    Details
    ISSN: 1573-0972
    Keywords: Aromatics ; benzoic acids ; dioxygenases ; fungi ; ring-cleavage enzymes ; yeasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Most knowledge of the degradation of aromatic compounds has been gained through investigation of the pathways in bacteria. In recent years, however, significant developments have been made in the understanding of the degradation of these compounds in yeasts and moulds. Many similarities have been identified between the bacteria and the yeasts and moulds but some significant differences occur. This review highlights these differences and discusses the current understanding of the fungal degradation of benzoate and some substituted benzoates. The pathways for the further conversion of the ring-fission substrates, which are common to all fungi capable of degrading these aromatic compounds, are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656508
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  • 5
    Electronic Resource
    Electronic Resource
    Microbial diversity: ex situ conservation of Indonesian microorganisms (1997)
    Springer
    World journal of microbiology and biotechnology 13 (1997), S. 359-361 
    Details
    ISSN: 1573-0972
    Keywords: Biodiversity ; conservation ; fermented foods ; fungi ; Indonesia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract This paper discusses the role of microbial resource collections in the ex situ conservation of microbial diversity and, in particular, the activities of a recently completed Darwin Initiative project to facilitate collection, identification and exploitation of Indonesian microbial diversity. This helped revitalize the collection of the Lembaga Ilmu Pengetahuea Indonesia (Indonesian Institute of Sciences), LIPI, Research and Development Centre for Biology, Bogor, Indonesia. It is suggested that a focus on microorganisms beneficial to man is essential to enable ex situ collections to be a useful tool in the conservation and sustainable utilization of microbial diversity. This task is enormous and far beyond the capabilities of one collection and its achievement will necessitate a network of collections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018559729803
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