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  • 1
    Electronic Resource
    Electronic Resource
    Growth and reproduction of the vermicomposting earthwormPerionyx excavatus as influenced by food materials (1997)
    Springer
    Biology and fertility of soils 24 (1997), S. 129-132 
    Details
    ISSN: 1432-0789
    Keywords: Perionyx excavatus ; Earthworms ; Feeding activity ; Plant residues ; Mineralization ; Maturity parameters ; Vermicomposting ; C/N ratio ; Straw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An outdoor study was undertaken using polyethylene containers to assess the suitability of different organic residues, soybean straw (Glycine max L. Merril.), wheat straw (Triticum aestivum L.), maize stover (Zea mays L.), chickpea straw (citer arietinum L.) and city garbage, as food for the tropical epigeic earthwormPerionyx excavatus, and to assess the influence of this earthworm on the decomposition of these materials. Maize stover was found to be the most suitable of the food materials used. Population growth ofP. excavatus was enhanced by addition of these organic materials in the temperature range 24°-30°C, while the population was adversely affected above 30°C in a vermiculture system. Addition of earthworms accelerated the breakdown of residues, which ultimately resulted in a lowering of the C:N ratio, water-soluble carbon and carbohydrates, and increased ash percentage and cation exchange capacity compared with their respective controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420233
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Growth and reproduction of the vermicomposting earthworm Perionyx excavatus as influenced by food materials (1996)
    Springer
    Biology and fertility of soils 24 (1996), S. 129-132 
    Details
    ISSN: 1432-0789
    Keywords: Key wordsPerionyx excavatus ; Earthworms ; Feeding activity ; Plant residues ; Mineralization ; Maturity parameters ; Vermicomposting ; C/N ratio ; Straw
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An outdoor study was undertaken using polyethylene containers to assess the suitability of different organic residues, soybean straw (Glycine max L. Merril.), wheat straw (Triticum aestivum L.), maize stover (Zea mays L.), chickpea straw (cicer arietinum L.) and city garbage, as food for the tropical epigeic earthworm Perionyx excavatus, and to assess the influence of this earthworm on the decomposition of these materials. Maize stover was found to be the most suitable of the food materials used. Population growth of P. excavatus was enhanced by addition of these organic materials in the temperature range 24°–30°C, while the population was adversely affected above 30°C in a vermiculture system. Addition of earthworms accelerated the breakdown of residues, which ultimately resulted in a lowering of the C:N ratio, water-soluble carbon and carbohydrates, and increased ash percentage and cation exchange capacity compared with their respective controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420233
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of nonionic solutes on the freezing potential of dilute ionic aqueous solutions (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 1404-1405 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Experiments are described which show that sucrose considerably reduces the freezing potential of very dilute solutions of alkali halides, NH4Cl and (NH4)2CO3 while urea enhances the magnitude of such potentials. Results have been explained on the basis of a hypothetical model based on nonequilibrium structure of ice containing hydrogen bonded structure and free water molecules in which foreign ions are incorporated during freezing and the growth of phase occurs by the acquisition of hydronium and hydroxyl ions which form free water molecules in the nonequilibrium ice phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449406
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Thermoelectret state in polyvinyl chloride : polyethylene polyblends (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 2031-2033 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermoelectrets of polyvinyl chloride (PVC)–polyethylene blends were prepared and their thermally stimulated discharge current was studied. The results are discussed in terms of space charge that leads to induced dipole formation. The results indicate that the contribution of PVC dipoles to the total polarization of polyblend thermoelectrets is either insignificant, or is masked by the space-charge polarization that leads to induced dipole formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341734
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Development of a sealed-off cw CO2 laser using a supported gold catalyst (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3853-3855 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A compact low-power long-life sealed-off cw CO2 laser has been developed by incorporating a catalyst-coated outer jacket that helps to regenerate CO2 from the dissociation products formed during discharge. Maintaining the catalyst at an optimized temperature prevented CO2 adsorption in its bulk and resulted in the required level of CO oxidation activity. The laser system has been operated during the day for the past five months at a constant output level of about 4 W. The gas analysis performed at different catalyst temperatures suggests that although the presence of CO in large amounts is detrimental, an optimum concentration of carbon monoxide supports the CO2 laser operation. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145177
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Electrical conduction in a polyblend of poly(methyl methacrylate) and poly(vinyl acetate) (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4196-4199 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electrical conduction in a polyblend of poly (methyl methacrylate) and poly (vinyl acetate) is studied as a function of voltage and temperature with three different electrodes: aluminum, copper, and silver. The results show that the Schottky–Richardson emission is dominant in the present case. The values of Schottky field-lowering constant β, the effective metal-insulator potential barrier, and the activation energy involved in the conduction are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339089
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    XRD studies of BaTiO3-PVDF composites (1991)
    Springer
    Journal of materials science 2 (1991), S. 54-57 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Solvent-cast films and hot-pressed pellets of BaTiO3-poly vinylidene fluoride (PVDF) composites in different weight ratios were prepared and their X-ray diffractograms were taken. The diffraction patterns indicate that BaTiO3 has cubic structure in the film samples, while in the hot-pressed pellets, orthorhombic and tetragonal phases of BaTiO3 coexist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00695005
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of grain size on the dielectric properties of PVC-mica composites (1990)
    Springer
    Journal of materials science 9 (1990), S. 443-445 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00721024
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  • 9
    Electronic Resource
    Electronic Resource
    Thermally stimulated current study in polyvinyl chloride (PVC)-mica composites (1990)
    Springer
    Journal of materials science 1 (1990), S. 143-147 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Mica powder was dispersed in polyvinyl chloride (PVC) in different percentages by weight and the thermally stimulated discharge current of the composites was studied. The results are discussed in terms of dipolar and space charge polarization that leads to induced dipole formation. Activation energies have been calculated for all the samples by the initial rise method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694734
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  • 10
    Electronic Resource
    Electronic Resource
    Cedarwood oil as a potential insecticidal agent against mosquitoes (1984)
    Springer
    Naturwissenschaften 71 (1984), S. 265-266 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00441340
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