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  • Arabidopsis thaliana  (2)
  • Chemistry  (2)
  • General Chemistry
  • 1995-1999
  • 1990-1994  (3)
  • 1975-1979
  • 1970-1974
  • 1955-1959  (1)
  • 1993  (3)
  • 1955  (1)
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  • 1995-1999
  • 1990-1994  (3)
  • 1975-1979
  • 1970-1974
  • 1955-1959  (1)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Indole-3-butyric acid in Arabidopsis thaliana (1993)
    Springer
    Plant growth regulation 13 (1993), S. 189-195 
    Details
    ISSN: 1573-5087
    Keywords: Arabidopsis thaliana ; autofluorography ; auxin conjugates ; IBA-glucose synthase ; indole-3-butyric acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Indole-3-butyric acid (IBA) was metabolized by seedlings of Arabidopsis thaliana cultivated in liquid medium under sterile conditions to two major metabolites. One metabolite was hydrolyzed by 1 N NaOH and β-glucosidase and was tentatively identified as IBA-glucose and the other was hydrolyzed by 7 N NaOH and amidase and was identified as an amide-linked conjugate. IBA-glucose synthase activity was found in a soluble enzyme fraction after incubation of 3H-IBA, IBA and UDP-glucose. The labelled reaction product had an Rf value comparable to IBA glucose and stained positive with Ehmann reagent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024261
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  • 2
    Electronic Resource
    Electronic Resource
    Indole-3-butyric acid in Arabidopsis thaliana (1993)
    Springer
    Plant growth regulation 13 (1993), S. 179-187 
    Details
    ISSN: 1573-5087
    Keywords: Arabidopsis thaliana ; auxin conjugates ; ethylene ; indole-3-acetic acid ; indole-3-butyric acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Indole-3-butyric acid (IBA) was identified by HPLC and GC-MS as an endogenous compound in plantlets of the crucifer Arabidopsis thaliana (L.) Heynh. A. thaliana was cultivated under sterile conditions as shaking culture in different liquid media with and without supply of hormones. Free and total IBA and indole-3-acetic acid (IAA) were determined at different stages of development during the culture period as well as in culture media of different initial pH values. The results showed that IAA was present in higher concentrations than IBA, but both hormones seemed to show the same behaviour under the different experimental conditions. Differences were found in the mode of conjugation of the two hormones. While IAA was mostly conjugated via amide bonds, the main IBA conjugates were ester bound. The ethylene concentration derived from the seedlings, when they were grown in flasks of different size, seemed not to influence the auxin content in the same cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024260
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of adhesion between fibers and fast curing elastomer resin (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 50 (1993), S. 863-874 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A method was developed to measure the adhesion between fibers and fast curing elastomer, in droplet form, using the microbond pull-out method. Samples were fabricated by arranging the fibers as a grid on which elastomer droplets were formed for testing. A droplet sliding test method was developed to investigate the nature of the sites of the droplets on the fiber after displacement of the droplets. Fibers of polyester, aramid, and HMW-polyethylene were tested with resins of polyurethane and natural rubber latex. The fibers had been surface-treated by corona, gamma radiation, or methanol extraction. The shape of the droplets was determined by microscopic measurement. The shear strength of the fiber/matrix bond was tested using a microvise grip in a tensile strength tester. © 1993 John Wiley & Sons, Inc.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070500514
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  • 4
    Electronic Resource
    Electronic Resource
    Copolymers in dilute solution. I. Preliminary results for styrene-methyl methacrylateWork supported in part by Office of Ordnance Research. (1955)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 16 (1955), S. 517-530 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dilute solution properties of copolymers are briefly discussed in relation to those of the parent homopolymers. It is shown that copolymer molecules are usually more expanded in solution than would be expected from the averaged behavior of the pure polymers, because of repulsive interactions between the unlike monomer units. A thermodynamic parameter χAB characterizing these interactions can be derived from measurements of the dilute solution properties of copolymers. In favorable cases this parameter can be independently evaluated from studies of ternary systems composed of the two parent homopolymers and a solvent, thus allowing prediction of the behavior of the copolymer. Light scattering and viscosity measurements on fractions of approximately equimolal copolymers of styrene and methyl methacrylate are presented and analyzed. The values of χAB deduced from the results in two solvents agree satisfactorily with each other, but are somewhat larger than those earlier obtained from measurements on ternary systems.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1955.120168236
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