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  • 1
    ISSN: 1433-0385
    Keywords: Key words: Barber's disease ; Interdigital pilonidal sinus ; Occupational disease ; Webspace disease. ; Schlüsselwörter: Zwischenfingerhaartaschenerkrankung ; Friseurkrankheit ; Sinus pilonidalis interdigitalis ; Berufserkrankung.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung. Bei der Zwischenfingerhaartaschenerkrankung penetrieren abgeschnittene Haarstücke die Haut der Zwischenfingerfalten von Friseuren und verursachen über chronische Entzündungsreaktionen eine Fistel- bzw. Sinusbildung. Wir beschreiben den Fall eines Patienten, bei dem sämtliche Zwischenfingerfalten beider Hände in unterschiedlichen Stadien betroffen sind. Eine ähnliche Ausdehnung dieser Berufskrankheit wurde bisher in der Literatur nicht beschrieben.
    Notes: Summary. Barber's disease is produced by short hairs that penetrate the interdigital spaces of the hands. The following chronic inflammatory reaction causes fistulas or sinuses and cysts. We present the case of a patient with interdigital pilonidal sinuses of all web spaces in both hands. Such an extensive case of this occupational disease has so far not been reported.
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  • 2
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The potentiometric and viscosimetric titration curves of poly(N-acetyldehydroalanine) (PNAcDHA) were compared with those of the nucleic acid base-containing dehydroalanine backbone polymers poly{(+ -) and (-)- [2-(thymin-1-yl]{propanoamido}propenoic acid} (PTDHA and P(-)TDHA)). The behavior of PNAcDHA was similar to polyacids such as poly(acrylic acid), but PTDHA and P(-)TDHA displayed very strong nearest neighbor interactions, since the pH curves had an additional inflection at half neutralization that was sensitive to the ionic strength of the medium and the viscosity curves showed little expansion of the polymer coil with increasing ionization. NAcDHA-TDHA copolymers were prepared which showed similar behavior. These results suggested that PTDHA and P(-)TDHA were extended and conformationally restricted in aqueous solution compared to PNAcDHA, findings that agreed with the results of spectroscopic studies of these polymers.
    Additional Material: 5 Ill.
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  • 3
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Alternating copolymers containing 4,4-isopropylidene-bisphenol (BPA) and comonomers with various degrees of polarity have been evaluated to find comonomer structures which provide low melt viscosity and good thermal stability. The materials were prepared by pyridine-catalyzed nucleophilic displacement reactions similar to that for the preparation of BPA polycarbonate. The molecular weights of the polycarbonates depend on the concentration and nucleophilicity of the attacking diol and the concentration and stability of a colored pyridine-chloroformate adduct formed during polymerization. The greatest thermal stability occurs for BPA-DMS and BPA-DEG. Thermomechanical flow measurements and Tg measurements were used to evaluate melt viscosity. The shapes and magnitudes of the Tg vs. Tf curves are sensitive to the copolymer chemical structure.
    Additional Material: 5 Ill.
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  • 4
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Water-soluble polynucleotide analogs having a poly(N-acyldehydroalanine) {poly(α[-(N-acylamino)acrylate])} backbone were studied by 360-HMz 1H-NMR, UV, and CD spectroscopies. Significant UV hypochromicity values for the polymers versus monomer model compounds as well as peak shifts in the NMR spectra implied a high degree of base stacking in these systems. The CD spectrum of poly{(-)-2-[2-(thymin-l-yl) propanoamido] propenoic acid} (p(-)TDHA), having an optically active side chain, was remarkably insensitive to the degree of neutralization of the polymer, but was very sensitive to the ionic strength of the solution. Continuous variation mixing experiments revealed no base-pairing interactions between complementary charged polymers, and weak interactions between charged and uncharged polymers and model compounds. These results suggest that the polymers are conformationally restricted in solution.
    Additional Material: 11 Ill.
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  • 5
    ISSN: 1435-2451
    Keywords: Nonunion of scaphoid bone ; Screw fixation ; Wrist function ; Kahnbeinpseudarthrose ; Zugschraubenosteosynthese ; Handgelenksfunktion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von 215 operativ-sanierend behandelten Kahnbeinpseudarthrosen konnten 170 Patienten nachuntersucht werden. Schraubenosteosynthese mit Spongiosaplastik (n = 113), Matti-Russe Plastik (n = 54) und Spanbolzung i. A. an Murray (n = 29) zeigten vergleichbare funktionelle Ergebnisse. Sehr gute und gute Resultate wurden in 51,1 % bis 54,5 % erreicht, unbefriedigende in 34,1 % bis 26,4%. Die Schraubenosteosynthese bietet Vorteile bei ausreichend großem proximalen Fragment. Es wird eine stabile Fixation erreicht. Die postoperative Ruhigstellung ist signifikant kürzer.
    Notes: Summary A total of 215 patients with nonunion of the scaphoid bone were treated operatively and examined 3 months to 10 years after operation. Wrist function in cases with screw fixation (n = 113) was comparable to those with bone grafting according to Matti-Russe (n = 54) and according to Murray (n = 29). Best and good results were achieved in 51.1 % − 54.5 %, poor results in 34.1 % − 26.4 %. Screw fixation is favorable in cases with a big proximal fragment. The fixation is stable and immobilization with plaster postoperatively is shorter than with the other procedures.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 364 (1984), S. 229-232 
    ISSN: 1435-2451
    Keywords: Third-degree burn injuries ; Necrectomy ; Temporary defect cover ; Skin transplantation ; Drittgradige Brandverletzung ; Nekrektomie ; Temporäre Defektdeckung ; Hauttransplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Drittgradige Brandverletzungen erfordern aus vitaler, funktioneller oder ästhetischer Indikation eine plastisch-chirurgische Therapie. Um das Infektionsrisiko möglichst gering zu halten, sollte mit der Nekrektomie so früh als möglich begonnen werden. Ausdehnung und Tiefe der Gewebsschädigung, der Infektionsgrad der Wunde sowie der Allgemeinzustand des Verletzten entscheiden darüber, ob eine temporäre Defektdeckung notwendig ist oder die autologe Spalthauttransplantation sofort angeschlossen werden kann. Hierzu haben sich neben den Streifentransplantaten Mesh-graft-Transplantate in unterschiedlicher Vergrößerung sehr bewährt.
    Notes: Summary In third-degree bum injuries vital, functional or esthetic indications require surgical therapy. In order to keep the risk of infection as low as possible it is necessary to begin with the necrectomy as soon as possible. Extent and depth of the damaged tissue, the degree of the wound infection as well as the patient's physical condition decide whether the defect should be covered temporarily or whether an autologous splitskin transplantation should be performed. In addition to stripe transplants meshgraft-transplants of different sizes have proved to be very successful in surgery of burn injuries.
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  • 7
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A survey of our recent work on synthetic polynucleotide analogs is given. Propionic acid and 3-methyl butyric acid derivatives substituted in the 2-position with nucleic acid bases have been used as chiral pendants for attachment to hydrophilic polyamine backbones. Hindered rotation about the amide bonds formed promotes a base-stacked structure as shown by ultraviolet hypochromic effects versus model compounds. If the pendant has been resolved, an optically active polymer results which may be studied by circular dichroism (CD). Thus, poly(ethylenimine) containing the (−)-2-(thymin-1-yl)-propionyl group as the grafted pendant showed exciton coupling of the B2u transition of the base chromophores in the CD, as observed in polynucleotides. This implies at least a local helical order in the stacking. The biological activity of such structures is briefly discussed.
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  • 8
    ISSN: 0887-6258
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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