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  • 1985-1989
  • 1980-1984  (4)
  • 1945-1949
  • 1981  (4)
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  • 1985-1989
  • 1980-1984  (4)
  • 1945-1949
Year
  • 1
    Electronic Resource
    Electronic Resource
    Thermal Inactivation of Clostridium perfringens After Growth at Several Constant and Linearly Rising Temperatures (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 46 (1981), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Inactivation kinetics of Clostridium perfringens strains NCTC 8238 and NCTC 8798 vegetative cells were evaluated in autoclaved ground beef after growth at constant (37, 41, 45, or 49°C) or linearly rising temperatures (4.0, 6.0, or 7.5 C°/hr) representative of long-time, low-temperature (LTLT) cooking. Inactivation temperatures of 55, 57, 59, 60, and 61°C were used. D values and z values were determined. For strain NCTC 8798 cells grown at 45°C, the average D59°C was 7.2 min and the zD was 3.8 C°. Both strains exhibited greater heat resistance after growth at higher constant temperatures. Also, NCTC 8798 was more heat resistant than NCTC 8238. With linearly rising temperature, terminal growth temperatures appeared dominant in resistance to inactivation. These data will permit predictions of growth and survival of C. perfringens during LTLT cooking of beef roasts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1981.tb04227.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of Insect Infestation in Food: A Semiautomated Calorimetric Analysis for Uric Acid with Immobilized Uricase (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 46 (1981), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A semiautomated differential calorimetric procedure for the determination of uric acid is reported. Samples are treated with hydrochloric acid, incubated at 55–60°C in a water bath, and neutralized with sodium hydroxide. Uric acid is extracted with sodium acetate and is determined with phosphotungstic acid as the color reagent. Uric acid is destroyed with uricase, and the calorimetric analysis is repeated for a blank measurement. The reaction specificity of uricase and its immobilization in a nylon coil contribute to the reliability of the method, which permits analysis of 30 samples/hr. Recovery studies and analyses of actual samples show that uric acid can serve as a chemical index of insect infestation in a variety of foods. The sensitivity of the method is approximately 5 μg uric acid/g of sample and is adequate to ascertain objectionable levels of stored product insect excreta contamination in food products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1981.tb04193.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effects of copper on the sabellid polychaete,Eudistylia vancouveri. II. Copper accumulation and tissue injury in the branchial crown (1981)
    Springer
    Archives of environmental contamination and toxicology 10 (1981), S. 87-104 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Copper in seawater caused injury to the radioles (gills) of the sabellid polychaete,Eudistylia vancouveri. Light and electron microscopy showed the loss of cellular adhesion and the structural derangement that lead to cell necrosis and death. The progression of injury was related to the uptake of copper into the tissues. Copper was found by X-ray microanalysis to be localized subcellularly in membrane-bound vesicles that are similar to lysosomes. Cell breakdown may result from lysosomal labilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01057578
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Beta spectroscopy of some neutron-rich cerium isotopes in252Cf fission products (1981)
    Springer
    The European physical journal 299 (1981), S. 209-212 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The method of cyclic-time optimization has been used, in conjunction with a beta-Kx-ray coincidence technique, to obtain the beta spectrum of some decaying cerium isotopes in the fission products of252Cf. A Kurie plot of the beta spectrum revealed at least four beta groups. From the relative isotopic yields of Kx-ray the isotopic origin of each group has been determined. The coincidence method used in this study allows the measurement of beta groups feeding excited levels of daughter products with high internal conversion coefficients. The end-point energies and isotopic origin of the measured beta groups were as follows: 2.349(±0.100)MeV,145Ce; 1.715(±0.103)MeV,145Ce and148Ce; 1.267 (±0.103)MeV,145Ce; 0.748(±0.109) MeV,146Ce and148Ce.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01443938
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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