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  • 1
    Electronic Resource
    Electronic Resource
    Response surface methodology multivariate analysis of properties of high-pressure-induced fish mince gel (2000)
    Springer
    European food research and technology 211 (2000), S. 79-85 
    Details
    ISSN: 1438-2385
    Keywords: Key words Gelling ; High pressure ; Heating ; Blue whiting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Factorial analyses were performed to determine the effect of high-pressure treatment on the characteristics of blue whiting mince of good gel-forming quality. Pressure, time and temperature independently influenced gel characteristics. Temperature had the greatest influence of the three. High-pressure gels were generally distinguished by lower adhesiveness, higher water-holding capacity and less yellowness than heat-induced gels. The combination of pressure and temperature produced more elastic gels, whereas gels made under high pressure at chilling temperatures were much harder, more deformable and more cohesive. There was no correlation between elasticity and deformability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002179900115
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of fractionation on the enzymatic state and behaviour of enzyme activities in different structural soil units (1987)
    Springer
    Biology and fertility of soils 4 (1987), S. 151-154 
    Details
    ISSN: 1432-0789
    Keywords: Kinetics ; pH activity curves ; Soil enzymes ; Structural soil units ; Thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The behaviour and state of soil catalase, dehydrogenases, urease and proteases associated with different soil structural fractions were studied. Assays of the enzymatic sensitivity to pH variation, thermal stability and the calculation of kinetics constants of Michaelis were performed. The results indicated that catalase and urease activity in these soils seem to be of the same type, because the activities presented a similar behaviour in the soil fractions studied. However, their state appeared different in each group of soil units. Dehydrogenases showed a similar state and behaviour while proteases were in a different state and behaviour in each soil fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256989
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Extraction of humic-β-glucosidase fractions from soil (1995)
    Springer
    Biology and fertility of soils 20 (1995), S. 77-82 
    Details
    ISSN: 1432-0789
    Keywords: Soil enzymes ; β-Glucosidase ; Humic/enzyme complexes ; Enzymatic extration ; Pyrophosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Humic compounds with β-glucosidase activity were extracted from soil using tetrasodium pyrophosphate as extracting solution. Mixture of soil samples with 0.01 M pyrophosphate in a ratio of 1:5 (w/v), adjustment to pH 7.0–7.3, extraction for 18 h with reciprocating agitation, and bacteriological filtration after centrifugation were the optimum conditions for extraction of the β-glucosidase complexes. Otherwise, experimental conditions for extraction indicated that the concentration and pH of pyrophosphate were the factors with the most influence on enzymatic extraction yields. The results indicated that the β-glucosidase was extracellular and associated with soil humates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307845
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    Paper (German National Licenses)
    Fulltext
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