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  • 1
    Electronic Resource
    Electronic Resource
    Transient impairment of recognition memory following ibotenic-acid lesions of the basal forebrain in macaques (1991)
    Springer
    Experimental brain research 86 (1991), S. 18-26 
    Details
    ISSN: 1432-1106
    Keywords: Basal forebrain ; Cholinergic system ; Recognition memory ; Scopolamine ; Physostigmine ; Monkey
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To assess the contributions of the basal forebrain cholinergic nuclei to visual recognition memory in macaques, we compared the effects of lesions of (a) the nucleus basalis of Meynert, (b) the medial septal and diagonal band nuclei, and (c) all nuclei combined on performance of delayed nonmatching-to-sample with trial-unique stimuli. Whereas monkeys with the separate lesions did not differ from each other or from normal control animals, those with combined lesions showed a significant impairment. With time and extended practice, however, the performance of the animals with combined lesions recovered to normal levels. During the recovery period, these monkeys showed an initially increased sensitivity to scopolamine that later dissipated, at which time they also failed to show the improvement that follows physostigmine administration in normal animals. Postmortem assessment of cortical choline acetyltransferase activity revealed that only the group with combined lesions had significant depletion of this enzyme. The results suggest that (1) the basal forebrain cholinergic system participates in mnemonic processes in primates and that (2) extensive damage to this system is necessary before impairments in recognition memory, even transient ones, can be observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231036
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Colonization of fiberglass insulation used in heating, ventilation and air conditioning systems (1994)
    Springer
    Journal of industrial microbiology and biotechnology 13 (1994), S. 154-158 
    Details
    ISSN: 1476-5535
    Keywords: HVAC systems ; Fungal colonization ; Fungi on fiberglass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The number of fungal species colonizing thermal and acoustic fiberglass insulations used in heating, ventilation, and air conditioning (HVAC) systems was fewer than that obtained from initial direct culture of these insulations. The colonization, determined by the microscopic observation of conidiophores with conidia, was primarily of acrylic-latex-facing material, but eventually the fungi permeated the fiberglass matrix. Isolates ofAspergillus versicolor were most often obtained from non-challenged insulation, whereasAcremonium obclavatum appeared to be the primary colonizing fungus in high-humidity (〉90%) challenge chambers. At a lower humidity (about 70%)Aspergillus flavus was one of the more prominent fungi. Not all duct liner samples were equally susceptible to colonization and duct board appeared relatively resistant to colonization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584000
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fungal colonization of synthetic substrates for use in space craft (1995)
    Springer
    Journal of industrial microbiology and biotechnology 14 (1995), S. 26-30 
    Details
    ISSN: 1476-5535
    Keywords: Fungal colonization ; Space craft materials ; Acremonium obclavatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Materials being used or considered for use in space flight were examined for their susceptibility to fungal colonization. The materials included soft goods (clothing) and insulation and fabrication products such as Velcro® attachments and elastic cord binders. Materials were exposed for at least 28 days in a highhumidity chamber colonized with over 50 species of fungi, including those species recommended for determining recalcitrance of materials to fungal biodegradation. At least nine of 25 products demonstrated extensive microscopic colonization by fungi, mostly byAcremonium obclavatum. Challenge procedures that rely on observations with the unaided eye, or 40×magnification of growth by a restricted number of fungal species with a cellulosic substrate as a positive control, are insufficient for determining the resistance of synthetic substrates to fungal colonization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570062
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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