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  • 1985-1989  (5)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 54 (1989), S. 0 
    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 role of the actomyosin denaturation in the thermal gelation of muscle pastes by ultraviolet (UV) irradiation was studied. The pastes and actomyosins were obtained from sardine, beef, and pork. When UV irradiation (2,700 μW/cm2) from a photochemical mercury-arc lamp was applied to the pastes, the surface gel strength of thermal gels markedly increased with prolonged irradiating time. The effect of UV at 360 nm on the sardine gels was superior to that at 250 nm. UV denaturation of actomyosin ATPases revealed that activation of Mg-ATPase and decrease of EDTA-ATPase occurred simultaneously. The possible role of UV irradiation in the thermal gelation was discussed from the point of actomyosin ATPases.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 54 (1989), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Changes in activities of actomyosin, acto-heavy meromyosin (acto-HMM), and acto-subfragment-I (acto-S-I) ATPases from tuna and sardine due to heat treatment (20°, 25°, 30°, 35°, 40°C) were compared for ordinary muscle and dark muscle. Activation of ordinary muscle actomyosin Mg-ATPases was more than doubled for tuna and tripled for sardine by heating at 35°C, while activation of dark muscle actomyosin was not observed at any temperature. The occurrence of thermal activation corresponded to a rapid loss of the EDTA-ATPase activity. Activation of hybrid actomyosins from dark and ordinary muscles was dependent upon myosin. For acto-HMM and acto-S-I thermal activation was not observed. The role of myosin tail fragments in thermal activation is discussed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Protein-protein interaction of myosin fragments from flying fish and white marlin muscles was studied by means of absorbance changes resulting from aggregation at temperatures of 20°C to 70°C. Subfragment-1 (S-1) exhibited a high extent of interaction with the transition temperature of 35–36°C, while the interaction of heavy meromyosin (HMM) was very weak. Though light meromyosin (LMM) gave lower interaction values throughout the heating temperature, the addition of butanol promoted markedly the interactions at the temperature above 50°C. The degree of promotion was high for flying fish and low for white marlin.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), S. 0 
    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 microbial sensor system consisting of immobilized living spoilage-causing bacterium, Alteromonas putrefaciens, and an oxygen electrode was prepared and applied to the continuous determination of fish freshness. Fish freshness was expressed as a ratio of A/B, where A is the current decrease of the microbial sensor obtained by the application of l0–50 μL fish extract and B is the current decrease by the equivalent volume of culture medium. Freshness of bluefin tuna and yellowtail meats stored in ice for up to 2 weeks was determined by both the proposed and the conventional K value enzyme sensor method. Good comparative results were obtained. One assay could be completed within 13 min.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), S. 0 
    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 heat treatment (25°, 30°, 35°, 37°, and 40°C) on acto-myosin Mg2+-ATPase activity from flying fish and black marlin were studied with respect to setting of their meat pastes. The setting ability of flying fish had very high values but black marlin was low. Flying fish actomyosin Mg2+ATPase was activated more than three times by heating at 35°C, while the activation of black marlin was about two-thirds at 37°C. For acto-HMM ATPase, however, no appreciable difference in activation was observed between flying fish and black marlin. For both fishes, the acto-S-1 ATPase activities were not enhanced by the heat treatment. A possible role of myosin fragments in this activation is discussed.
    Type of Medium: Electronic Resource
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