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  • Brassica napus  (1)
  • Fusarium spp.  (1)
  • cellulose acetate  (1)
  • 2000-2004  (2)
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  • 2000-2004  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 157-168 
    ISSN: 1572-8943
    Keywords: cellulose acetate ; DSC ; glass transition ; melting ; polycaprolactone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Cellulose acetate-based polycaprolactones (CAPCL's) were synthesized by the polymerization of ε-caprolactone which was initiated by non-substituted OH group in cellulose acetate. The CL/OH (mol mol−1) ratios of the CAPCL's were changed from 2 to 20. Thermal and viscoelastic properties of the CAPCL sheets were studied by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Glass transition, cold crystallization and melting were determined by DSC. Dynamic modules (E'), dynamic loss modules (E'') and tanδ were measured in a temperature range from −150 to 50°C by DMA. Apparent activation energy of a dispersion was calculated from the frequency dependency of E'' peak temperature. It was found that the main chain motion of both CA and PCL is observed in a CL/OH ratio from 0 to 10 mol mol−1. However, when CL/OH ratio exceeds 10 mol mol−1, the crystalline region which is rearranged by the PCL chain association is observed and only the main chain motion of PCL can be detected.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 26 (2000), S. 2387-2399 
    ISSN: 1573-1561
    Keywords: Rhizopus spp. ; Fusarium spp. ; rhizosphere microorganisms ; Brassicaceae ; Rorippa sylvestris ; Brassica napus ; Brassica juncea ; Lepidium sativum ; myrosinase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We isolated several strains of Rhizopus and Fusarium spp. as dominant fungi in the rhizospheres of Brassicaceae plants. The Fusarium isolates showed a higher tolerance of the antifungal constituents of "mustard oil," which originates from the glucosinolates that are characteristic secondary metabolites of the Brassicaceae, than other Fusarium isolates from non-Brassicaceae plants. In contrast, the Rhizopus isolates showed a high tolerance regardless of their source. Myrosinase activity was found in Bn-R-1-1 (Rhizopus sp.) isolated from the rhizoplane of Brassica napus and Ls-F-in-4-1 (Fusarium sp.) isolated from a surface-disinfected root of Lepidium sativum (Brassicaceae). Ls-F-in-4-1 was the Fusarium most tolerant of the Brassicaceae antifungal constituents. These results suggest that fungi in the rhizospheres of Brassicaceae plants may be selected because of secondary metabolites exuded from the roots of host plants.
    Type of Medium: Electronic Resource
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