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  • Articles  (6)
  • fermentation
  • Springer  (6)
  • 1995-1999  (6)
  • 1945-1949
  • 1999  (6)
  • Biology  (6)
  • Process Engineering, Biotechnology, Nutrition Technology  (4)
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  • Articles  (6)
Publisher
  • Springer  (6)
Years
  • 1995-1999  (6)
  • 1945-1949
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 25 (1999), S. 2779-2792 
    ISSN: 1573-1561
    Keywords: Douglas fir ; ponderosa pine ; anaerobic respiration ; fermentation ; kairomone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Douglas fir (Pseudotsuga menziesii), west of the Oregon Cascades, and ponderosa pine (Pinus ponderosa), east of the Cascades, were cut during the fall in conjunction with various forest management practices. Trees cut varied in size and age, and the stumps were exposed to disparate winter temperatures and precipitation patterns. Nevertheless, the stumps showed similar responses in their synthesis and accumulation of ethanol. The following spring, ethanol concentrations in above-ground tissues of both species ranged from 3 to 116 times higher than in their corresponding root tissues. We suggest that this difference results from the above-ground tissues being more hypoxic than roots because they were exposed to more water from precipitation and warmer temperatures. Ethanol concentrations in the above-ground tissues of ponderosa pine stumps were about two to six times higher than in Douglas fir, and root tissues from pine stumps usually contained more ethanol after anaerobic incubation than roots from Douglas fir. Ethanol and volatile terpenes released from stumps can attract various beetle species that not only vector root diseases, but can also damage or kill seedlings and saplings. Understanding the dynamics of ethanol synthesis and accumulation in stumps and slash might contribute to new alternatives for managing these insects.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 25 (1999), S. 2793-2809 
    ISSN: 1573-1561
    Keywords: Pseudotsuga menziesii ; Gnathothrichus spp. ; ethanol ; host selection ; anaerobic respiration ; fermentation ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Logs from the base of Douglas fir (Pseudotsuga menziesii) trees cut in October 1993 were randomly assigned to one of three treatment groups: (1) wet logs—cut from the fallen tree and left exposed to rain, (2) dry logs—cut from the fallen tree, placed on blocks, and protected from rain under a plastic tent, and (3) crown logs—left attached to the fallen tree with its branches intact and exposed to rain. The following May, ethanol concentrations were highest in the phloem and sapwood of wet logs (0.24 and 0.35 μmol/g fresh wt, respectively). Ethanol concentrations in tissues from dry and crown logs were similar to each other (ranging from 0.002 to 0.03 μmol/g fresh wt), but were significantly lower than in wet logs. It appears that rain absorbed by the outer bark of wet logs creates a barrier to gas exchange between living tissues and the atmosphere, which facilitates the development of hypoxic conditions necessary for ethanol synthesis and accumulation. Branches on crown logs exposed to rain help maintain low ethanol concentrations in the log tissues; we discuss several potential mechanisms to explain this response. By early September, the densities of Gnathothrichus spp. gallery entrance holes were high on wet logs (21.5/m2) and low on dry (2.5/m2) and crown logs (5.8/m2), indicating their preference for logs with higher ethanol concentrations. Protecting logs from rain will significantly reduce ethanol concentrations and the density of ambrosia beetle galleries. Leaving branches attached to logs will produce similar results, but its effectiveness may vary depending on the environmental conditions. Host selection by secondary scolytid beetles that use ethanol as a kairomone can be manipulated and possibly managed by controlling the production of ethanol in the host resource.
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  • 3
    ISSN: 1573-0972
    Keywords: Conidia ; cultures ; fermentation ; G. fujikuroi ; morphological ; strains
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Strain H-984 of G. fujikuroi grown for 38 h in a shake flask with medium containing 20 g glucose l−1, 3 g yeast extract l−1, 2.5 g NH4NO3 l−1, 0.5 g KH2PO4 l−1, 0.1 g MgSO4 l−1, 1 g CaCO3 l−1, and inoculated into a bioreactor with medium containing 60 g glucose l−1; 1 g NH4Cl l−1; 3 g KH2PO4 l−1 and 1.5 g MgSO4 l−1 produced 1100 mg gibberellic acid l−1.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-0972
    Keywords: Beauveria bassiana ; fermentation ; L-glutaminase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Beauveria sp. BTMF S10 isolated from marine sediment produced extracellular L-glutaminase. Maximal L-glutaminase yield (46.9 U/ml) was obtained in a medium supplemented with 1% (w/v) yeast extract and sorbitol, 9% (w/v) sodium chloride and 0.2% (w/v) methionine, initial pH 9.0 and at 27  °C after 108 h. This enzyme was inducible and growth-associated.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 231-234 
    ISSN: 1573-0972
    Keywords: starter-cultures ; garri ; cassava ; fermentation ; carriers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Garri is a popular food in Nigeria derived from the fermentation of the mash obtained from the enlarged root of the cassava plant, Manihot esculenta Crantz. As currently produced, the mash used for garri production is spontaneously fermented; on account of this, there is great variability in the organoleptic properties and the quantities of residual cyanide in the garri from Nigeria. The use of starter cultures can help ensure uniformity in these properties if dry carriers can be found on which the fermentative organisms can survive for extended periods so as to facilitate the transportation of their carriers to the many small and scattered garri producers. We therefore studied the survival, singly or mixed, on dry starchy substrates derived from locally available crops, of Lactobacillus coryneformis, Lact. delbruckii, and Saccharomyces sp., which are associated with garri production, as carriers for these organisms. After 16 weeks of storage, between 75% and 85% of the organisms survived on yam, coco-yam, cassava in that order, whereas between 40 and 65% survived on rice and garri. Refrigeration at 4 °C did not improve the survival of the organisms, when compared to room temperature (30 °C) for the organisms stores on yam, coco-yam, and cassava. However where the organisms were stored on rice and garri, refrigeration improved the survivability of the organisms by between 10 and 20%.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 15 (1999), S. 425-430 
    ISSN: 1573-0972
    Keywords: Activity ; fermentation ; HA-1-92 ; isolation ; oxohexaene ; Streptomyces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A new antifungal antibiotic, HA-1-92, was isolated from the biomass of Streptomyces CDRIL-312, by extracting in butanol and further purified by silica gel column chromatography followed by preparative TLC. The antibiotic is presumed to be an oxohexaene macrolide and showed promising antifungal activity against yeasts and filamentous fungi including human and plant pathogens. It was found to be less toxic in mice than known oxohexaenes.
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