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  • Polymer and Materials Science  (19)
  • apoptosis  (6)
  • ionosphere  (3)
  • Gene identification  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Genetics of resistance to Puccinia graminis tritici in ‘Chris’ and ‘W3746’ wheats (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 846-855 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia graminis tritici ; Triticum aestivum ; Monosomic analysis ; Rust resistance ; Gene identification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary ‘Chris’ wheat possessed genes Sr5, Sr7a, Sr8a, Sr9g and Sr12. ‘W3746’, derived from the cross ‘Chris’/‘Baart’, possessed Sr7a and Sr12. The response conferred by Sr7a was influenced by the genetic background. Although Sr7a or Sr12 alone conferred no observable resistance upon adult plants, the adult resistances of ‘Chris’ and ‘W3746’ to predominant pathotypes appeared to be associated with the interaction of Sr7a and Sr12, or genes at closely linked loci.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00289389
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  • 2
    Digitale Medien
    Digitale Medien
    Day time observations of precursors at low latitude (1996)
    Springer
    Earth, moon and planets 73 (1996), S. 267-275 
    Details
    ISSN: 1573-0794
    Schlagwort(e): Earth atmosphere ; ionosphere ; whistlers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Whistler precursors observed during day time at low latitude ground station Gulmarg (Geomag. Lat. 24
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00115885
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  • 3
    Digitale Medien
    Digitale Medien
    Propagational features of higher harmonic tweeks at low latitudes (1996)
    Springer
    Earth, moon and planets 73 (1996), S. 277-290 
    Details
    ISSN: 1573-0794
    Schlagwort(e): Earth atmosphere ; ionosphere ; whistlers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Higher harmonic tweeks observed for the first time at the low latitude station Varanasi (geomag. lat. 14
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00115886
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  • 4
    Digitale Medien
    Digitale Medien
    Whistler observations of the quiet time plasmasphere-ionosphere coupling fluxes at low latitude (1996)
    Springer
    Earth, moon and planets 74 (1996), S. 7-15 
    Details
    ISSN: 1573-0794
    Schlagwort(e): atmospheric plasma ; ionosphere
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Observations of whistlers during quiet times made at low-latitude ground station Nainital (geomag. lat. 19
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00118718
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  • 5
    Digitale Medien
    Digitale Medien
    Genetics of resistance toPuccinia graminis tritici andPuccinia recondite tritici in four South African wheats (1990)
    Springer
    Theoretical and applied genetics 79 (1990), S. 401-410 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Puccinia graminis tritici ; Puccinia recondita Tritici ; Triticum aestivum ; Rust resistance ; Gene identification
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Genes for resistance toPuccinia graminis tritici andPuccinia recondita tritici identified in four South African wheats were:Sr6,Sr8a,Sr9e, andLr13 in ‘W3762’;Sr5,Sr8a,Sr9b,Sr12,Sr24,Lr13, andLr24 in ‘W3760’;Sr2,Sr24,SrC,Lr13, andLr24 in ‘W3751’; andSr7a,Sr23,Sr36, andLr16 in ‘W3755’. GenesSr2,Sr9e, andSr24 also conferred adult plant resistance to the predominant pathotypes ofP. graminis tritici. GenesSr7a,Sr23, andSrC, when present alone, did not confer acceptable adult plant resistance, even though low seedling reactions were associated with them when tested with the same pathotypes. Genetic recombination betweenLr13 andSr9e was estimated at 12.5%±2.3%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01186086
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  • 6
    Digitale Medien
    Digitale Medien
    Photo- and thermoinitiated oxidation of high-impact polystyrene.N.C.L. Communication No. 5688. I. Characterization by FT-IR spectroscopy (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 32 (1994), S. 485-493 
    Details
    ISSN: 0887-624X
    Schlagwort(e): photooxidation ; thermal-oxidation, high-impact ; polystyrene ; FT-IR spectroscopy ; derivatization reaction ; oxidation profile ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The photo- and thermooxidative degradation of different grades of high-impact polystyrene (HIPS) has been studied by FT-IR spectroscopy. The oxidized films were treated with NH3 and SF4 for the rapid identification and resolution of the various carbonyl species, alcohols, and hydroperoxides. All the sample gave similar oxidation products, but in varying quantities. The heterogenity in the film was also determined by micro-FT-IR spectroscopy. The thermal degradation processes at different temperature were compared. © 1994 John Wiley & Sons, Inc.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1994.080320310
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  • 7
    Digitale Medien
    Digitale Medien
    Chain-scission and yellowing in high impact polystyreneNCL communication No. 5996. (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 36 (1995), S. 309-313 
    Details
    ISSN: 0959-8103
    Schlagwort(e): high impact polystyrene ; polychromatic irradiation ; viscosity ; tensile impact ; yellowing ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Different grades of impact-modified polystyrene were studied by viscometry, tensile impact test and colour change upon exposure to polychromatic irradiation at 55°C in air. The samples underwent extensive reduction in intrinsic viscosity [η] and tensile impact strength, and yellowed upon polychromatic irradiation (λ ≥ 290 nm). Chain-scission during photo-oxidative degradation was also studied under conditions where evolution of volatiles was negligible. Tristimulus values were calculated for unirradiated and irradiated samples. The rate of oxidative degradation was maximum in the sample possessing higher unsaturation content.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pi.1995.210360402
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  • 8
    Digitale Medien
    Digitale Medien
    Mechanical behavior of polyblended polystyrene and ethylene-propylene-diene rubber by cationic reactions in the melt (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 38 (1989), S. 1677-1683 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Attempts have been made to obtain high impact polystyrene by Lewis-acid-initiated degradation process in the melt reactions of PS and EPDM. It is found that impact strength improves whereas tensile strength decreases. This can be interpreted by the increased solubility of the coupled rubber molecules in the continuous phase.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1989.070380908
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  • 9
    Digitale Medien
    Digitale Medien
    Miscibility and interaction studies on some aqueous polymer blend solutions by ultrasonic and rheological techniques (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 51 (1994), S. 1559-1565 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: The aqueous solutions of poly(ethylene oxide)-polyacrylic acid, poly(vinyl pyrrolidone)-poly(vinyl alcohol), and poly(ethylene oxide)-poly(vinyl alcohol) blends have been studied by ultrasonic, rheological, and viscometric techniques. Extensive investigation over a wide range of concentrations, temperatures, compositions, pH, and shear rates indicate the degree of miscibility, extent of interaction between the polymers, and stoichiometry of the polymer complexes formed by the strong interaction between the polymers in solutions. These investigations indicate the miscibility of poly(ethylene oxide)-polyacrylic acid and poly(ethylene oxide)-poly(vinyl pyrrolidone) blends and the immiscibility of poly(ethylene oxide)-poly(vinyl alcohol) blends in conformity with other reported investigations. © 1994 John Wiley & Sons, Inc.
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1994.070510905
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  • 10
    Digitale Medien
    Digitale Medien
    Studies on impact modification of polystyrene (PS) by ethylene-propylene-diene (EPDM) rubber and its graft copolymers. I. PS/EPDM and PS/EPDM-g-styrene blends (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 40 (1990), S. 685-692 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Ethylene-propylene-diene (EPDM) rubber is an excellent rubber for outdoor use. High impact polystyrene (PS) containing EPDM rubber may show improved weathering resistance. PS is incompatible with EPDM; hence bulk polymerization technique is adopted for the synthesis of graft products which show limited compatibility with PS. Two initiators were chosen at two different working temperatures to produce high grafting efficiency and grafting percentage. In the present system, it is shown that the graft copolymer and polystyrene compositions show higher improved impact strength behavior than that of the products based upon simple dispersion of EPDM in polystyrene.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1990.070400505
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