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  • 1
    Electronic Resource
    Electronic Resource
    Different development of pine wilt disease in artificially infectedPinus thunbergii seedlings potted together with different tree species (1997)
    Springer
    Journal of forest research 2 (1997), S. 39-43 
    Details
    ISSN: 1610-7403
    Keywords: adjacent trees ; Bursaphelenchus xylophilus ; pinewood nematode ; Pinus thunbergii ; susceptibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract To evaluate the effect of adjacent tree species on the susceptibility of Japanese black pine (Pinus thunbergii) to pine wilt disease, an inoculation experiment was conducted usingP. thunbergii seedlings potted with seedlings of six tree species,i. e. Alnus sieboldiana, Eurya japonica, Lespedeza bicolor formacutifolia, Pinus thumbergii, Robinia pseudo-acacia andSarothamus scoparius. About ten months after planting, they were inoculated with the pinewood nematode (Bursaphelenchus xylophilus) in early July 1992. After that, the proportion of pine seedlings with completely discolored foliage increased more quickly when the seedlings were potted withR. pseudo-acacia, S. scoparius orA. sieboldiana than when potted withP. thunbergii, L. bicolor orE. japonica. At the end of the study period, 17 weeks after inoculation, it reached 90.6%, 90.0%, 87.5%, 72.7%, 63.3%, and 59.4% when the pine seedlings were potted withR. pseudo-acacia, S. scoparius, A. sieboldiana, P. thunbergii, L. bicolor andE. japonica, respectively. This indicated that the susceptibility ofP. thunbergii seedlings to pine wilt disease was influence by the species of adjacent trees.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02348261
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  • 2
    Electronic Resource
    Electronic Resource
    Microspheres prepared from temperature-sensitive graft polymers (1991)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 192 (1991), S. 2915-2923 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyallylamine-graft-poly(N-isopropylacrylamide) was prepared by coupling polyallylamine with poly(N-isopropylacrylamide) (the latter with an end-standing carboxyl group). The graft polymer obtained showed a temperature-responsive phase transition under alkaline conditions, whereas the starting poly(N-isopropylacrylamide) with end-standing carboxyl group showed temperature-sensitivity under acidic conditions. With an increase in the degree of grafting the temperature-sensitivity of the polymer under weakly alkaline conditions increases. Microspheres were prepared by cross-linking the graft polymers with glutaraldehyde in water-in-oil emulsion. Trypsin immobilized to the microspheres showed temperature-responsiveness in its catalytic activity. The graft polymer can be used as a component of temperature-sensitive devices in various forms.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1991.021921208
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  • 3
    Electronic Resource
    Electronic Resource
    Gel permeation chromatography using porous glass beads modified with temperature-responsive polymers (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 249-256 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Poly(N-isopropylacrylamide) (PIPA) with a carboxyl group at its end was coupled with amino group-carrying porous glass beads by the active-ester method. Gel permeation chromatography of dextran was carried out by using a column packed with the PIPA-carrying glass beads. The chromatograms of dextrans with various molecular weights are strongly affected by temperature: the elution time of dextran is largely changed between 25 and 32°C due to a change in the effective pore size by the transition of the PIPA chains from coils to globules on the surface of the pores of the glass beads. These results suggest the usability of PIPA-carrying glass beads as devices for thermo-controllable chromatography.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1992.021930123
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic analysis of irreversible adsorption of protein on porous polymer resins as studied by pulse injection method (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 30 (1987), S. 216-224 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Irreversible adsorption of bovine serum albumin onto porous polymer resins is examined by a pulse injection method. The experimental results are theoretically analyzed by a model based on the assumption that there exist three kinds of binding sites with different binding rates, which are considered to exist in the vicinity of the outer periphery surface, the inner surface of macropore, and the micropore, or center part, of particles. The three kinds of adsorption rates are also evaluated by a batch method and are nearly equal to the corresponding kinetic parameters by this method. The amount of BSA bound irreversibly to the resins is independent of the protein concentration and the flow rate examined, which suggests that protein molecules penetrate into pores of resins and occupy almost all the effective binding sites in the resins. The total amount of bound BSA shows a pH dependence with a maximum near the isoelectric point of BSA, and the amount of BSA bound at the slowest rate is most largely influenced by pH.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260300211
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  • 5
    Electronic Resource
    Electronic Resource
    Restricted diffusion effect on the binding of proteins to porous polymer resins as studied by repetitive injection method (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 31 (1988), S. 547-552 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A solution of bovine serum albumin (BSA) is repeatedly injected into a column packed with highly porous and hydrophobic polymer resins at appropriate intervals. The injected BSA is thoroughly retained in the column for 10 injections and, afterwards, starts to be eluted from the column gradually. Taking into consideration the restricting effect of already bound BSA upon the diffusion of newly injected BSA into the pores of the polymer resins, we can interpret the BSA elution profile from columns packed with polymer resin of various pore sizes and porosities. The effects of the binding rate constant and BSA concentration upon the elution profiles of BSA are also analyzed. Formyl groups are introduced into the polymers as a binding site with proteins, and the elution profiles of BSA from the column packed with the formylated resin are also analyzed.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260310606
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