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  • Polymer and Materials Science  (4)
  • aldox-2  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Genetic and developmental characterization of the aldox-2 locus of Drosophila melanogaster (1986)
    Springer
    Biochemical genetics 24 (1986), S. 683-699 
    Details
    ISSN: 1573-4927
    Keywords: Drosophila ; aldox-2 ; molybdoenzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The aldox-2 locus in Drosophila melanogaster has been shown to affect differentially three molybdoenzymes, aldehyde oxidase, pyridoxal oxidase, and xanthine dehydrogenase. These effects are most obvious at times surrounding the pupal-adult boundary, when the normal organism accumulates large amounts of these enzymes in their active form. This locus has been more precisely mapped genetically to 2–82.9±2.1, with complete concordance between the effects of all recombinant chromosomes on all three enzymes. The cytogenetic location has also been determined to be between 52E and 54E8, with the likelihood that it lies within the region 54B1-54E8. The aldox-2 mutant allele has no visible phenotype and is completely recessive for enzyme effects at all stages tested. Segmental duplication of this region, including the aldox-2 + allele, has no apparent effect on the visible phenotype or the enzymatic activity. The mutant aldox-2 allele has no effect on the developmental expression of two unrelated enzymes, 6-phosphogluconate dehydrogenase and NADP+-dependent isocitrate dehydrogenase. The effects of this locus on aldehyde oxidase, xanthine dehydrogenase, and pyridoxal oxidase suggest that this locus may code for a product involved in the synthesis of the molybdenum cofactor common to these enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499002
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  • 2
    Electronic Resource
    Electronic Resource
    Thealdox-2 locus ofDrosophila melanogaster also affects sulfite oxidase and molybdenum metabolism (1989)
    Springer
    Biochemical genetics 27 (1989), S. 99-118 
    Details
    ISSN: 1573-4927
    Keywords: Drosophila ; aldox-2 ; molybdoenzymes ; sulfite oxidase ; molybdenum ; tungsten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Mutation at thealdox-2 locus inDrosophila melanogaster affects the specific activities of four molybdoenzymes differentially during development. Sulfite oxidase activity is normal during late larval and pupal stages but is reduced during early adult stages inaldox-2 organisms. There was complete concordance among the effects ofaldox-2 on sulfite oxidase, aldehyde oxidase, xanthine dehydrogenase, and pyridoxal oxidase, when 38 stocks were analyzed which were derived from single recombination events betweenc andpx, markers which flankaldox-2. Several different biochemical analyses indicate that the active molybdoenzymes present in thealdox-2 strain are normal with respect to size, shape,pH-activity profile,K m , and molecular weight. Significant differences were found between thealdox-2 strain and the OR control strain in their responses to dietary Na2MoO4 and Na2WO4. The mutant strain is much more resistant to the effects of dietary Na2WO4 and much more responsive to the administration of Na2MoO4 than the OR control strain when these effects are quantitated by measurements of molybdoenzyme specific activities. This evidence suggests that thealdox-2 + gene product has a molybdenum binding site which can also bind tungsten and that this site is altered in the mutant strain. The hypothesis presented explains the observed effects of thealdox-2 mutation and relates them to the other mutations reported in this gene-enzyme system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563021
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  • 3
    Electronic Resource
    Electronic Resource
    Bis[4(1-methyl-1,2-epoxyethyl)] derivatives of phenyl ether, 1,4-diphenoxybenzene, and bis(4-phenoxyphenyl) etherProd. No. 1615 (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 2029-2036 
    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: The syntheses of three new α-methyl-substituted bis(epoxyethyl) derivatives of phenyl ether, 1,4-diphenoxybenzene, and bis(4-phenoxyphenyl) ether are reported. Improved procedures for preparing 1,4-diphenoxybenzene and bis(4-phenoxyphenyl) ether by the Ullmann method are described. Infrared spectral data for the bisepoxides and their precursors are given, as are some reactions of the bisepoxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070111019
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  • 4
    Electronic Resource
    Electronic Resource
    Novel thermally stable and chemically resistant epoxy polymers derived from phenylene oxides (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 12 (1968), S. 607-618 
    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: Thermogravimetric and differential thermal analysis data are presented for three novel bisepoxy monomers and formulated coatings derived therefrom. The coatings were insensitive to impact in liquid oxygen and showed excellent resistance to liquid nitrogen tetroxide, concentrated nitric acid, and a variety of organic solvents. All coatings showed excellent adhesion to metals and oxidation resistance superior to any known commercial epoxy polymer. Thermal resistance was excellent at 500°F. for periods of at least 500 hr. in air. Other data on these novel epoxy polymers are also presented.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1968.070120401
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  • 5
    Electronic Resource
    Electronic Resource
    Disubstituted p-phenylene monomers. α-methyl- and α-phenyl-vinyl derivatives of benzene, biphenyl, p-terphenyl, and p,p′-diphenoxiybiphenyl (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 215-225 
    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: The high-yield syntheses of bis [p-(α-methylvinyl)] monomers of benzene, biphenyl, p-terphenyl, and 4,4′-diphenoxybiphenyl are reported. Also described are the syntheses of new bis[p-(α-phenylvinyl)] monomers of biphenyl, p-terphenyl, and 4,4′-diphenoxy-biphenyl. Infrared spectral data for the diolefinic monomers and their precursors are presented, together with brief details for the polymerization of the diolefins by means of free radical and Lewis acid catalysts.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070130120
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  • 6
    Electronic Resource
    Electronic Resource
    Thermally stable polymer precursors. Diisopropenyl and bis (1-phenylvinyl) p-phenylene oxide monomers (1969)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 123 (1969), S. 19-28 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wird über die Synthese von homologen Reihen von p-disubstituierten Isopropenylund 1-Phenylvinylimonomeren berichtet, die sich von Phenyläther, 1.4-Diphenoxybenzol, und Bis-(4-phenoxyphenyl)-äther ableiten. IR-Daten für die Diolefine und ihre Vorstufen werden angegeben.
    Notes: The syntheses of a homologous series of p-disubstituted isopropenyl and 1-phenylvinyl monomers derived from phenyl ether, 1.4-diphenoxybenzene and bis(4-phenoxyphenyl) ether are reported. Infrared spectral data for the diolefins and their precursors are presented.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1969.021230103
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