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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 2. Theoretical consideration of the phase-inversion process (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 1103-1108 
    Details
    ISSN: 1435-1536
    Keywords: Key words Bisphenol A epoxy resin ; Waterborne dispersions ; Phase-inversion emulsification ; Physical method ; Mechanism
    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  A theoretical consideration of the phase-inversion technique to prepare waterborne particles based on the experimental facts of the phase inversion process given in part 1 of this series is presented. The deformation and breakup of the water droplets dispersed in an epoxy resin phase under shear action are analyzed in terms of microrheology. The interaction and coalescence dynamics among the water droplets stabilized by an interfacial layer formed by the emulsifier molecules are discussed in terms of Derjaguin–Landau–Verwey–Overbeek theory and effective collision theory, respectively. A criterion for the completion of phase-inversion is that the attraction among the water droplets exceeds the entropic repulsion. Thus, a physical model of phase-inversion is proposed to predict the effects of some control variables on the phase-inversion process as well as the structural features of the waterborne particles, by which the experimental results could be well interpreted. It is indicated that the achievement of phase inversion is determined by the dynamic coalescence among the water droplets before the phase-inversion point (PIP). If the dynamic coalescence among the water droplets is ignored, phase inversion is achieved completely and sub- micron-sized particles are prepared. In comparison, if the dynamic coalescence is significant, phase inversion is achieved incompletely and a large complex water-in-oil-in-water structure is prepared. In the case of complete phase inversion, it is shown that the size of the waterborne particles is comparable with the size of the water droplets before the PIP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960000376
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  • 2
    Electronic Resource
    Electronic Resource
    Origin of Scm1 and Scm2– two loci conferring resistance to sugarcane mosaic virus (SCMV) in maize (2000)
    Springer
    Theoretical and applied genetics 100 (2000), S. 934-941 
    Details
    ISSN: 1432-2242
    Keywords: Key words Zea mays L ; Maize ; Sugarcane mosaic virus ; SCMV ; Scm1 ; Scm2 ; AFLP ; RFLP ; SSR ; Pedigree relationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Sugarcane mosaic virus (SCMV) causes serious losses of grain and forage yield of maize (Zea mays L.) in Europe. Two dominant genes, Scm1 and Scm2, have been identified to confer resistance to SCMV. Scm1 is located on the short arm of chromosome 6 and Scm2 near the centromere region of chromosome 3. In the present study,resistant, partially resistant, and susceptible maize inbred lines, together with their ancestral lines, were evaluated with molecular markers to trace back the origin of Scm1 and Scm2. The banding patterns indicated that the Scm1 region, originally identified in resistant European line FAP1360A, was derived from its ancestral line FAP954A. The other two resistant European lines, D21 and D32, most likely carry the same Scm1 region, which originated from their common ancestral line A632. This Scm1 region was also present in three partially resistant lines, D09, FAP1396A and FAP693A, but not in the resistant U.S. inbred Pa405. Apart from FAP954A and A632, none of the remaining ancestral lines and none of the susceptible lines harbored the Scm1 region. The Scm2 region present in FAP1360A was obviously transmitted from its ancestral line Co125. However, the presence of the respective Scm2 region was not confirmed in the other three resistant lines (D21, D32 and Pa405), the remaining ancestral lines, and all partially resistant lines by using closely linked markers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051373
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  • 3
    Electronic Resource
    Electronic Resource
    High-resolution mapping of loci conferring resistance to sugarcane mosaic virus in maize using RFLP, SSR, and AFLP markers (1999)
    Springer
    Molecular genetics and genomics 261 (1999), S. 574-581 
    Details
    ISSN: 1617-4623
    Keywords: Key words Maize ; Sugarcane mosaic virus ; Fine mapping ; RFLP marker ; AFLP marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Sugarcane mosaic virus (SCMV) is one of the most important virus diseases of maize in Europe. Genetic analysis on backcross five (BC5) progeny derived from the cross FAP1360A (resistant) × F7 (susceptible) confirmed that at least two dominant genes, Scm1 and Scm2, are required for resistance to SCMV in the progeny of this cross. With the aid of RFLP and SSR marker analyses, Scm1 was mapped in the region of 8.7 cM – between the nucleolus organizer region (nor) and RFLP marker bnl6.29 on the short arm of chromosome 6, while Scm2 was mapped to an interval of 26.8 cM flanked by the RFLP markers umc92 and umc102 near the centromere region of chromosome 3. Both chromosome regions were further enriched for AFLP markers by successful application of a bulked segregant analysis to this oligogenic trait. A total of 23 linked AFLP markers were identified, clustered in chromosome regions adjacent to either Scm1 or Scm2. Seven AFLP markers linked to Scm1 resided within the nor-bnl6.29 interval, and one of them, E3M8-1, showed no recombination with Scm1. Three AFLP markers linked to Scm2 are located between umc92 and umc102.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380051003
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation of waterborne dispersions of epoxy resin by the phase-inversion emulsification technique. 1. Experimental study on the phase-inversion process (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 1164-1171 
    Details
    ISSN: 1435-1536
    Keywords: Key words Bisphenol A epoxy resin ; Waterborne dispersions ; Phase-inversion emulsification ; Electrical properties ; Rheological behavior
    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  Waterborne dispersions of bisphenol A epoxy resin were prepared by the so-called phase-inversion emulsification technique. The electrical properties, rheological behavior and morphological evolution during the phase inversion process were characterized systematically. It was shown that both emulsifier concentration and emulsification temperature play great roles in controlling the phase inversion process as well as the structural features of the waterborne particles. A high emulsifier concentration, i.e. 10.90 wt% and a low emulsification temperature, i.e. 73 °C, facilitate complete phase inversion, in which all water droplets in the system are simultaneously transformed into the continuous phase at the phase-inversion point (PIP). In this case, sub-micron-sized, discrete waterborne particles were formed. In contrast, a complex water-in-oil-in-water structure was achieved by incomplete phase inversion at a low emulsifier concentration, i.e. 2.33 wt%, and a high temperature of 80 °C. The morphological evolution observed by scanning electron microscopy revealed that not all the water droplets in the system were converted into the continuous phase at the PIP and that some small water drops were trapped within the waterborne structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960000375
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