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  • Chemistry  (4)
  • Drittgradige Brandverletzung  (1)
  • Zugschraubenosteosynthese
  • 1
    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.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 39 (1988), S. 13-17 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Synthese und Eigenschaften einiger neuer funktioneller Oligomere sowie daraus erhaltener funktioneller und segmentierter Polymere werden beschrieben. Im ersten Teil der Arbeit werden Synthese und Eigenschaften von hochentwickelten segmentierten Konstruktionspolymeren behandelt. Die Polymere enthalten als starre Segmente vernetzte Bereiche; diese sind durch lineare Spacersegmente verbunden, die aus thermoplastischen Oligomeren mit funktionellen Endgruppen gebildet werden. Die Struktur-Eigenschafts-Beziehungen werden diskutiert. Der zweite Teil der Arbeit berichtet über die Synthese und mögliche Anwendungen von neuen funktionellen Oligomeren und Polymeren, die Cyclophosphazen-Einheiten enthalten. Besondere Aufmerksamkeit wird funktionellen Polymeren mit bioaktiven Aziridinylcyclophosphazen-Einheiten gewidmet, die durch spezielle biologisch abbaubare Spacer verbunden sind.
    Notes: Syntheses and properties of some novel functional oligomers and functional or segmental polymers thereof are reported. First part of the paper concerns the synthesis and properties of high performance segmental engineering polymers. These polymers contain crosslinked network units as rigid segments, linked by linear spacers, derived from the functionally terminated thermoplastic oligomers. Structure-properties relationships are discussed. Second part of the paper refers to the syntheses and possible applications of novel functional oligomers and polymers, containing cyclophosphazene moieties, particular attention being paid to the functional polymers with bioactive aziridinylcyclophosphazene units linked by specific biodegradable spacers.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 4,6-Tetrachlorocyclotriphosphazene-2-spiro-2′-dinaphtho [1,2-d:2,1-e] [1,3,2]dioxaphosphepin (1a) and the dinaphtho [2,1-d:1,2-e] derivative (1b) were synthesized and identified on the basis of elemental and spectral (MS, IR, UV, 1H and 31P NMR) analysis. The anticancer activity of the new isomers against P388 leukemia was studied in vivo and discussed in terms of their electronic structures. A strict correlation was found between the resonance effects in the particular isomers and their antitumor activities.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 4
    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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  • 5
    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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  • 6
    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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