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  • 1
    Electronic Resource
    Electronic Resource
    Temperature dependence of growth, enzyme secretion and activity of psychrophilic Antarctic bacteria (1994)
    Springer
    Applied microbiology and biotechnology 41 (1994), S. 477-479 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Five psychrophilic Antarctic bacteria have been selected for their capacity to secrete exoenzymes into culture medium. These strains are able to grow from 0 to about 25° C. However, production of lipase fromMoraxella, α-amylase fromAlteromonas haloplanctis, β-lactamase fromPsychrobacter immobilis and protease fromBacillus is maximal at temperatures close to that of their environment (—2 to 4° C) and is strongly inhibited at higher temperatures. This thermal effect involves alterations in the secretory pathway in the upper range of temperatures, losses due to the enzyme thermal lability and in some cases to reduction in cell development. The apparent optimal activity temperature of these enzymes is between 30 and 40° C, i.e. about 20° C lower than that of their mesophilic counterparts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939039
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Temperature dependence of growth, enzyme secretion and activity of psychrophilic Antarctic bacteria (1994)
    Springer
    Applied microbiology and biotechnology 41 (1994), S. 477-479 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Five psychrophilic Antarctic bacteria have been selected for their capacity to secrete exoenzymes into culture medium. These strains are able to grow from 0 to about 25° C. However, production of lipase fromMoraxella, α-amylase fromAlteromonas haloplanctis, β-lactamase fromPsychrobacter immobilis and protease fromBacillus is maximal at temperatures close to that of their environment (—2 to 4° C) and is strongly inhibited at higher temperatures. This thermal effect involves alterations in the secretory pathway in the upper range of temperatures, losses due to the enzyme thermal lability and in some cases to reduction in cell development. The apparent optimal activity temperature of these enzymes is between 30 and 40° C, i.e. about 20° C lower than that of their mesophilic counterparts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01982539
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Temperature dependence of growth, enzyme secretion and activity of psychrophilic Antarctic bacteria (1994)
    Springer
    Applied microbiology and biotechnology 41 (1994), S. 477-479 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Five psychrophilic Antarctic bacteria have been selected for their capacity to secrete exoenzymes into culture medium. These strains are able to grow from 0 to about 25° C. However, production of lipase from Moraxella, α-amylase from Alteromonas haloplanctis, β-lactamase from Psychrobacter immobilis and protease from Bacillus is maximal at temperatures close to that of their environment (–2 to 4 ° C) and is strongly inhibited at higher temperatures. This thermal effect involves alterations in the secretory pathway in the upper range of temperatures, losses due to the enzyme thermal lability and in some cases to reduction in cell development. The apparent optimal activity temperature of these enzymes is between 30 and 40° C, i.e. about 20° C lower than that of their mesophilic counterparts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01982539
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Characterization of poly(acrylamide-co-acrylates) obtained by inverse microemulsion polymerization (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 676-682 
    Details
    ISSN: 1435-1536
    Keywords: Poly(acrylamide-co-acrylates) ; microemulsion polymerization ; viscosity ; 13C NMR determination ; potentiometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Two series of poly(acrylamide-co-acrylates) with compositions rangingfrom 10 to 55 mol % acrylate units were prepared by radical polymerization in inverse microemulsions. The compositional analyses of the samples were performed using elemental analysis, potentiometry and13C NMR. The comparison between the three methods indicates that13C NMR is the most reliable one, avoiding errors which often arise from associated water in hydrophilic polymers. The copolymer viscosity exhibits a maximum behavior around 40 mol % acrylate content, a lower value than that already observed for co-polymers prepared in homogeneous solution. The production of copolymers presenting high intrinsic viscosities (∼ 3700 cm3g−) is achieved using an inverse microemulsion as the polymerization medium operating at lower temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01469528
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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