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  • 1
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    German Medical Science GMS Publishing House; Düsseldorf
    In:  61. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC) im Rahmen der Neurowoche 2010; 20100921-20100925; Mannheim; DOCV1676 /20100916/
    Publication Date: 2010-09-17
    Keywords: ddc: 610
    Language: English
    Type: conferenceObject
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  • 2
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    German Medical Science GMS Publishing House; Düsseldorf
    In:  63. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit der Japanischen Gesellschaft für Neurochirurgie (JNS); 20120613-20120616; Leipzig; DOCSA.11.03 /20120604/
    Publication Date: 2012-06-05
    Keywords: iMRI ; 1.5 Tesla ; tumors ; intraop-MRT ; 1.5 Tesla ; Tumoren ; ddc: 610
    Language: English
    Type: conferenceObject
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  • 3
    ISSN: 1432-0789
    Keywords: Genetically engineered bacteria ; Soil invertebrates ; Leaf litter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seven bacterial strains, most of them bearing natural or recombinant plasmids, were introduced in oak leaf litter or soddy-podzolic soil. In these substrata, which contained litter-dwelling diplopods and isopods, or endogenic earthworms, bacteria survival was followed. In the absence of the animals, the numbers of introduced strains gradually decreased. In the presence of the animals, plasmid-bearing strains of Pseudomonas putida survived at 105–107 CFUs g-1 up to 1.5 months in both leaves and soil. The total numbers of bacteria found in excrements from the soil macrofauna were 5–15 times higher than in the food. The numbers of P. putida in the excrements were equal to or higher than in the food. The numbers of Pseudomonas stutzeri JM302 (pLV1013) and Azospirillum brasiliense ATCC29710 (pFACII) in the excrements were always 2–10 times lower than in the food. The digestive fluid taken from the middle part of the gut of the diplopod Pachyiulus flavipes showed a strong antibacterial activity. Those bacteria with lower survival in the gut appeared to be more sensitive to digestion by the midgut fluid. In contrast, the hindgut fluid did not suppress the viability of P. stutzeri JM302 (pLV1013). We postulate that the introduced bacteria partially survive the midgut passage and then multiply with a high growth rate in the hindgut of the animals. The environmental consequences of the interactions between soil invertebrates and the released bacteria are discussed.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The tyrosinases from Agaricus bisporus and Streptomyces eurythermus, laccases from Polyporus versicolor and Pleurotus ostreatus, and peroxidase from horseradish were strongly adsorbed on different bentonites and a clay-humus complex but less to on kaolinite and quartz. The adsorption was significantly dependent on the pH, reaching maxima in the range of the specific isoelectric points; it was less influenced by the valency and type of exchangeable cations. Most of the enzymes lost their activity when adsorbed on bentonite. The activity of desorbed enzymes was distinctly diminished when compared with free enzyme preparations. Conclusions from this behaviour were drawn as to the possible use of phenoloxidases as agents to transform phenolics in soil.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A mixed population of microorganisms isolated from the municipal garbage compost was cultivated in a full nutrient liquid medium under aerobic conditions. In order to simulate the presence in compost of both noncolloidal and colloidal solid particles, glass beads, bentonite, or humic acid were added to the cultures. The growth of microorganisms and the CO2 evolution rose with bentonite and humic acid, but the humic acid did not enhance the growth of the potential pathogenic bacteria. Solid particles appreciably influenced the endurance to heat stress of microorganisms supporting their adaptation to the changed temperature.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Growth of Aspergillus niger and Cladosporium herbarum occurred in shake cultures with polyurethane as the sole nutrient source. Simultaneously, the isocyanate almost completely disappeared from the polyurethane as determined with an IR-spectroscope. Otherwise, no structural changes were found in the polyurethane, though both fungi penetrated into the resilient foam tested.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Enzyme assays for β-glucosidase, β-acetylglucosaminidase, phosphatase, phosphodiesterase, and proteinase were made in soil samples incubated for two months after contamination with trichloroethylene, tetrachloroethylene, and dichloromethane. These volatile chlorinated hydrocarbons were added at doses of 10, 100, and 1000 μg per 100 g dry soil, respectively. Almost no effect was observed in soil sample contaminated with 10 μg of the chemicals when compared with control soil. When 100 μg of the volatile chlorinated hydrocarbons was added, the activity of β-glucosidase, β-acetylglucosaminidase and, in part, also of proteinase, was reduced during the first 28 days of incubation but returned to the same or slightly higher level than in the control soil after 2 months. Trichloroethylene, tetrachloroethylene, and dichloromethane at a concentration of 1000 μg per 100 g soil primarily inhibited activity of all enzymes under test. However, after two months, the enzymatic activities especially in soil samples contaminated with tetrachloroethylene and dichloromethane were found to be at the same or higher level than in the control soil.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The decomposition of polyurethane, measured gravimetrially or using infrared spectrophotometry, was found to be more complete in polyurethane based on polyester and only very small in polyurethane based on polyether. In the presence of clay minerals the decomposition was inhibited. If positive, the decomposition of polyurethane followed the sequence: remaining free isocyanates→urea and amide groups→urethane groups→isocyanuric acid rings.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The development of different cultural groups of microorganisms, respiratory activity of the complex microflora, change in the contents of organic mass and, furthermore, the production and optical properties of humic substances were investigated in municipal refuse which had been disposed of for 20 months in a model landfill of about 40 m3. Among various microorganisms, the proteolytic bacteria were the prevalent group, although the relative participation of actinomycetes in the microflora raised in the later stages of the disposal. The microbial counts were almost stable after 8 to 12 months. Respiratory activity decreased up to the twentieth month, due to the lack in utilizable organic substances as a carbon source. Humic substances were extracted from municipal refuse and after the twelfth month of refuse disposal they were similar to soil humic acid with respect to their spectral properties in the visible, UV and IR wave range.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0789
    Keywords: Key words Genetically engineered bacteria ; Soil invertebrates ; Leaf litter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seven bacterial strains, most of them bearing natural or recombinant plasmids, were introduced in oak leaf litter or soddy-podzolic soil. In these substrata, which contained litter-dwelling diplopods and isopods, or endogenic earthworms, bacteria survival was followed. In the absence of the animals, the numbers of introduced strains gradually decreased. In the presence of the animals, plasmid-bearing strains of Pseudomonas putida survived at 105–107 CFUs g–1 up to 1.5 months in both leaves and soil. The total numbers of bacteria found in excrements from the soil macrofauna were 5–15 times higher than in the food. The numbers of P. putida in the excrements were equal to or higher than in the food. The numbers of Pseudomonas stutzeri JM302 (pLV1013) and Azospirillum brasiliense ATCC29710 (pFACII) in the excrements were always 2–10 times lower than in the food. The digestive fluid taken from the middle part of the gut of the diplopod Pachyiulus flavipes showed a strong antibacterial activity. Those bacteria with lower survival in the gut appeared to be more sensitive to digestion by the midgut fluid. In contrast, the hindgut fluid did not suppress the viability of P. stutzeri JM302 (pLV1013). We postulate that the introduced bacteria partially survive the midgut passage and then multiply with a high growth rate in the hindgut of the animals. The environmental consequences of the interactions between soil invertebrates and the released bacteria are discussed.
    Type of Medium: Electronic Resource
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