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  • Polymer and Materials Science  (4)
  • Flow system  (2)
  • Antinuclear antibody  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Development of a micro flow spectrophotometric titration method
    Amsterdam : Elsevier
    Analytica Chimica Acta 261 (1992), S. 505-508 
    Details
    ISSN: 0003-2670
    Schlagwort(e): Chelatometry ; Flow system ; Spectrophotometry ; Titrimetry ; Zinc
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(92)80232-V
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  • 2
    Digitale Medien
    Digitale Medien
    Flow-injection spectrophotometric determination of sulphate ion with a barium chloranilate-cellulose reaction column
    Amsterdam : Elsevier
    Analytica Chimica Acta 261 (1992), S. 241-245 
    Details
    ISSN: 0003-2670
    Schlagwort(e): Flow system ; Spectrophotometry ; Sulphate ; Waters.
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(92)80197-F
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  • 3
    Digitale Medien
    Digitale Medien
    An immunoserological study of patients with vibration syndrome (1992)
    Springer
    International archives of occupational and environmental health 63 (1992), S. 537-539 
    Details
    ISSN: 1432-1246
    Schlagwort(e): Vibration syndrome ; Antinuclear antibody ; Collagen disease
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary In a study undertaken to investigate the relationship between vibration syndrome and collagen disease, 90 Japanese patients with vibration syndrome (all men aged 41–86 years) were examined immunologic abnormalities, mainly by a set of immunoserology tests. Of these 90 patients, 25 had examinations at yearly intervals for 3 consecutive years, while the other 65 underwent examinations once. The results indicate that, of all the patients studied, 10 (11.1%) gave a positive RA test, 6 (6.7%) had leukopenia, 5 (5.6%) had hypergammaglobulinemia, and 15 (16.7%) had hypocomplementemia (CH50). Worthy of particular note are the 21 patients (23.3%) who were positive for nuclear-specific antibodies (1: ≥ 40) (using Hep-2 cells as the nuclear substrate), with some of them suspected of having Sjögren's syndrome, progressive systemic sclerosis, or systemic lupus erythematosus. During a 3-year follow-up period, 10 (40%) of 25 patients exhibited rising titers of nuclear-specific antibodies with conversion to seropositivity for these antibodies. The facts that the positivity rate for nuclear-specific antibodies was significantly higher in these patients with vibration syndrome (23.3%) than in healthy adult men over 40 years of age (1.8%) (P 〈 0.05) and that a progressive elevation of nuclear-specific antibody titer was noted in a high percentage of the patients were suggestive of some causal relationship between the appearance of nuclear-specific antibodies and the use of vibrating tools.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00386342
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  • 4
    Digitale Medien
    Digitale Medien
    Electronic absorption spectra of poly(dimethylsilylene-co-diphenylsilylene) (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 2383-2385 
    Details
    ISSN: 0887-624X
    Schlagwort(e): polysilane ; poly(dimethylsilylene-co-diphenylsilylene) ; electronic absorption spectra ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1993.080310921
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  • 5
    Digitale Medien
    Digitale Medien
    Poly(dimethylsilylene-co-diphenylsilylene) (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 30 (1992), S. 2333-2340 
    Details
    ISSN: 0887-624X
    Schlagwort(e): polysilane ; poly(dimethylsilylene-co-diphenylsilylene) ; copolymers ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: In this work several polyorganosilylenes were synthesized including homo-and copolymers containing SiMe2 and SiPh2 units. A Wurtz-type coupling reaction of the respective dichlorodiorganosilanes with sodium metal, varying the Ph2SiCl2/Me2SiCl2 ratio was the chosen synthesis method. Products with different characteristics for solubility, structure (cyclic or linear), composition, and molecular weight distribution could be obtained depending on the comonomer ratios employed. The polysilane derivatives were characterized by infrared spectroscopy (IR), proton nuclear magnetic resonance (1H-NMR), and gel permeation chromatography (GPC). Valuable information related to the comonomers' reactivities was obtained, such as molecular weight distribution, composition, and relationships between yields of soluble, insoluble, and cyclic materials of each polycondensation reaction. © 1992 John Wiley & Sons, Inc.
    Zusätzliches Material: 11 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pola.1992.080301106
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  • 6
    Digitale Medien
    Digitale Medien
    Blends of organosilicon polymers with polystyrene and poly(2,6-dimethyl-1,4-phenylene oxide) (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 35 (1997), S. 2609-2616 
    Details
    ISSN: 0887-6266
    Schlagwort(e): blends ; organosilicon polymers ; polystyrene ; poly(2,6-dimethyl-1,4-phenylene oxide) ; Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Blends of organosilicon polymers with polystyrene, PS, and poly(2,6-dimethyl-1,4-phenylene oxide), PPE, were investigated by transmission electron microscopy and differencial scanning calorimetry. Blends with poly(tetramethylsilphenylenesiloxane), PTMPS, showed a morphology characterized by globular domains dispersed in the organic matrix. An apparent homogeneous system was observed when poly(dimethylsilphenylene), PDSP, was mixed with PPE. A crystalline phase was found in samples with a higher PDSP content. The morphology of PS/PDSP blends with low PDSP content showed a dendritic phase dispersed in the PS-rich matrix. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 2609-2616, 1997
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Synthesis and structure of crosslinked poly[(methylsiloxane)-co-(oxymethylene)] copolymers (1997)
    Weinheim : Wiley-Blackwell
    Macromolecular Rapid Communications 18 (1997), S. 747-754 
    Details
    ISSN: 1022-1336
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: A series of new crosslinked copolymers was obtained by cationic ring-opening copolymerization of 1,3,5,7-tetramethylcyclotetrasiloxane and 1,3,5-trioxane. The poly[(methylsiloxane)-co-(oxymethylene)] copolymers are white crystals or glassy. Crosslinking reactions take place in the reaction medium. The degree of crosslinking increases with a higher concentration of the methylsiloxane units in the copolymers. The combination of solid-state magic-angle spinning nuclear magnetic resonance of 29Si and 13C and Fourier-transform infrared spectroscopy provided a quantitative description of the copolymer microstructure.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/marc.1997.030180818
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