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Digitale Medien

An immunoserological study of patients with vibration syndrome (1992)

Matsumoto, Y. ; Yasue, T. ; Miyagawa, H. ; [weitere]

Springer

International archives of occupational and environmental health 63 (1992), S. 537-539

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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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Digitale Medien

Electronic absorption spectra of poly(dimethylsilylene-co-diphenylsilylene) (1993)

Sartoratto, Patricia P. C. ; Yoshida, I. Valeria P.

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 2383-2385

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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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Digitale Medien

Poly(dimethylsilylene-co-diphenylsilylene) (1992)

Sartoratto, Patrícia P. C. ; Yoshida, I. Valéria P.

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part A: Polymer Chemistry 30 (1992), S. 2333-2340

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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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