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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Sodium Acid Pyrophosphate in Combination with Sodium Nitrite or Sodium Nitrite/Potassium Sorbate on Clostridium botulinum Growth and Toxin Production in Beef/Pork Frankfurter Emulsions (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Combinations of sodium acid pyrophosphate (SAPP) with added sodium nitrite and/or potassium sorbate were tested at various pH levels to determine effectiveness in delaying Clostridium botulinum growth and toxin production in frankfurter emulsions. Formulations containing sodium nitrite (40 ppm), potassium sorbate (0.26%) and SAPP (0.4%) resulted in a greater delay of toxin production (12–18 days) than other combinations (6–12 days) having similar pH values. Treatments containing 0.4% SAPP appeared to be more inhibitory than their counterparts without SAPP, displaying less numbers of toxic samples during the 53-day storage period at 27°C. Aerobic mesophilic colony counts and residual nitrite data showed little difference among treatments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb14949.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of Belly Composition on Sorbate-Cured Bacon (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), 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 comparison was made between fat-type and lean-type bellies cured with either 40 ppm sodium nitrite/0.26% potassium sorbate or 120 ppm sodium nitrite. Residual nitrite levels were higher in fat bacon regardless of cure. Sorbate-cured bacon resulted in signiticantly higher TBA numbers than did regular-cure bacon. Nitrosopigment to total pigment ratio did not vary with cure, but did remain significantly higher in fat bacon and roughly paralleled residual nitrite levels. Analysis for nitrosamines indicated greater concentrations in fat bellies compared to lean. Nitrosamines were suppressed though not eliminated, by the sorbate cure in both fat and lean bellies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1982.tb11063.x
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  • 3
    Electronic Resource
    Electronic Resource
    Inhibition of Clostridium botulinum Growth from Spore Inocula in Media Containing Sodium Acid Pyrophosphate and Potassium Sorbate with or without added Sodium Chloride (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 49 (1984), 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: The effects of sodium acid pyrophosphate (SAPP), sodium chloride (NaCl) and/or potassium sorbate (PS) on the growth from heat-activated spores of three individual strains or a mixture of ten strains of Clostridium botulinum in peptone-yeast extract-glucose broth at pH 5.55 or 5.85 were measured spectrophotometricalty at A630nm. Growth ratios (GR = treatment/control) based on time to reach A630= 0.35 or 0.04 were calculated and used to compare effects of additives on strains. SAPP, NaCl, PS, and pH exhibited independent significant main effects (p≦0.01) on delaying growth in most C. botulinum strains tested. Combinations of additives without NaCl consistently caused an increase in the GR and an increase in organism sensitivity to additives in the medium. Treatments containing SAPP (0.2 or 0.4%) and PS (0.13 or 0.26%) were more effective for delaying growth than other formulations tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1984.tb12850.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of Packaging Film and Vacuum Level on Regular and Sorbate-Cured Bacon (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 47 (1982), 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: Bacon was produced with either 40 ppm NaNO2/0.26% potassium sorbate, or 120 ppm NaNO2. Slices were packaged in either nylon/Surlyn or nylon/Saran/Surlyn pouches and sealed at either a high or intermediate vacuum level. At 0, 10, 21 and 28 days after packaging, residual nitrite, rancidity, pH, residual salt and pigment conversion were measured. Residual nitrite and pH were lower while nitrosopigment conversion was higher in bacon packaged with the high-barrier film. Vacuum level, however, had no effect on any measured characteristic. The sorbate/reduced nitrite cure resulted in lower pigment conversion, lower residual nitrite, and a higher TBA number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1982.tb10080.x
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  • 5
    Electronic Resource
    Electronic Resource
    Lattice dynamics from vibronic spectra: Examination of a generalized shell model for SrF2 and BaF2 (1972)
    Springer
    The European physical journal 256 (1972), S. 22-42 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract On the basis of quantum mechanical ab initio theories practical shell-models are established. These models include a polarization as well as a radial and axial deformation of the lattice ions, and are built up in such a way that measured macroscopic quantities can be incorporated. The predicted dynamics is tested by means of vibronic spectra of Sm2+ in SrF2 and BaF2. It turns out that both the structural form and the positions and intensities of the predominant vibronic maxima are very sensible to the high frequency dielectric constant ɛ∞. An excellent agreement with the experimental result is found if ɛ∞ fictitiously is chosen lower than the measured value, whereas the agreement would be considerably worse, if the experimental value itself of ɛ∞ is choosen. Possible sources of these discrepancies are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394494
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Ab initio shell models for the lattice dynamics of ionic crystals (1972)
    Springer
    The European physical journal 251 (1972), S. 300-313 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The approach is based on the adiabatic principle and on a fundamental hierarchical postulate. The latter assumes that in the electronic ground-state the conduction-band contributions are small of first order for the chosen basic set of one-electron functions. From this linearized equations of motion beyond the Hartree-Fock approximation are established. Utilizing unitary transformations and Green's function techniques, the adiabatic potential for the lattice dynamics is calculated. It depends on the nuclear positions and on interband “shell-degrees of freedom”N αβ=〈a α + a β〉which are fixed by self-consistent subsidiary conditions. Transcription of the chosen quasi-Bloch-Basis to atomic quantities yields that for each transition α → β at the single ionmμ and for each “charge-transfer” excitation α1 → β2 between two ionsm 1μ1 andm 2μ2 there is one “shell degree of freedom”. By projection onto spherical harmonics and summation, integral shell modes of breathing, polarization and quadrupole-detormation may be introduced. It is realized that breathing and quadrupole deformation can be expected to have effects of comparable magnitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394636
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  • 7
    Electronic Resource
    Electronic Resource
    Nonlinear canonical transformations in the coupling between degenerate high and low energy excitations (1972)
    Springer
    The European physical journal 256 (1972), S. 291-308 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In microscopic many-body physics the coupling between the motion of fast particles (electrons) and slow particles (nuclei) is universal. The standard Born-Oppenheimer decoupling procedure breaks down, if the energy separation in the “fast” system is of the same order as the elementary excitation in the “slow” system. In this case “dynamical resonance” effects are to be expected. In the present investigation a model system of a coupling between a doubly degenerate high energy excitation and doubly degenerate low energy oscillator is handled by a non-linear canonical transformation which is shown to be quasi-exact in the sense that it diagonalizes the Hamiltonian in both extremal coupling cases. The transformation has some flexibility, so that the diagonalization regions can be enlarged. It is employed to calculate the “zero-phonon” optical response, which indeed displays aresonance effect. Likewise, another nonlinear transformation is devised, which only in the strong coupling limit yields diagonalization. This latter transformation in a natural way leads to the conventional semi-classical approaches to the dynamical Jahn-Teller problem. The results gotten with it are identical with those from our transformation in the strong coupling limit. On the basis of our results some remarks are made concerning the possible impact of the breakdown of the adiabatic approximation in other regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01391977
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  • 8
    Electronic Resource
    Electronic Resource
    TheU-matrix as a simple tool to derive canonical transformations (1974)
    Springer
    The European physical journal 268 (1974), S. 245-249 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A straightforward application of theU-matrix formalism is utilized to derive canonical exponential transformations. It turns out that an extremely compact form for these transformations can be written down. In view of the fact that the transformation used so far, mostly have been found by guessing, a simple calculation prescription for them seems to be of great value. As an application the derivation of the already wellknown transformations of theE-e andT-t Jahn Teller problems as well as that of the Fröhlich Hamiltonian is presented. In the Jahn-Teller examples it is further demonstrated, how for each single problem the validity region of the transformation may be examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669887
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Altered hyperemic response of the coronary arterial bed in alloxan-diabetes (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 738-740 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Reactive hyperemic responses of the coronary arterial bed, provoked by asphyxia or clamping of the coronary artery, were compared in alloxan-diabetic and metabolically healthy dogs. In alloxan-diabetic dogs the response of the coronary arterial bed lasted longer, and its reactivity to hypoxia was lower. Treatment with adenosine caused less vasodilation in diabetic animals than in controls. These changes may be due to the altered reactivity of diabetic vascular smooth muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990301
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  • 10
    Electronic Resource
    Electronic Resource
    Effects on prostaglandins F2α, I2, and indomethacin on isolated coronary arteries from healthy and alloxandiabetic dogs (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 863-864 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Contractile responses of isolated coronary arteries from healthy and alloxan-diabetic dogs to prostaglandin F2α were enhanced by indomethacin and inhibited by prostaglandin I2. The potentiation by indomethacin was more prominent in diabetic vessels than in normal arteries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01985683
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