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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Clinical oral investigations 1 (1997), S. 125-130 
    ISSN: 1436-3771
    Schlagwort(e): Key words Fluoride ; Dentin ; Dentinal fluid flow
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The aim of the present study was to compare fluoride uptake of dentin with and without simulating dentinal fluid flow. Eighty-five dentinal discs were prepared from retained human molars. Seventeen discs were used to assess baseline fluoride content (controls). Sixty-eight discs were evenly distributed among two experimental groups and were fixed for 24 h in a two-chamber device allowing for simulating dentinal fluid flow. Thirty-four samples were treated with dentifrice slurry containing a low fluoride concentration (Elmex, dilution 1:5); the remaining discs were treated with a solution of a high fluoride concentration (Elmex Fluid). For the perfused group, each of the 17 discs of the high and low concentration fluoride groups were constantly perfused during the experiment. The remaining fluoridated specimens were not perfused. All specimens were assayed for KOH-soluble fluoride and structurally bound fluoride. Structurally bound fluoride was determined in three successive layers of 20 µm each. Uptake of KOH-soluble fluoride was significantly higher in the specimens fluoridated with Elmex Fluid compared to the samples treated with the dentifrice slurry. The uptake of KOH-soluble fluoride was not influenced by perfusion of the dentinal discs. However, perfusion resulted in lower acquisition of structurally bound fluoride in the samples treated with the dentifrice slurry. After application of Elmex Fluid, no significant difference was found in the amount of structurally bound fluoride between the perfused specimens and non-perfused samples. It is suggested that further studies on fluoride uptake in dentin should use a model simulating outward dentinal fluid flow.
    Materialart: Digitale Medien
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  • 2
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 473 (1981), S. 178-188 
    ISSN: 0044-2313
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: On Ruthenium perovskites of type Ba2BRuO6 and Ba3BRu2O9 with B = Indium, RhodiumThe black perovskites Ba2InRu5+O6 and Ba3InRu2O9 (mean oxydation state of ruthenium: +4.5) adopt the hexagonal BaTiO3 structure and form a continuous series of mixed crystals. According to the intensity calculations and analysis of the vibrational spectroscopic data an ordered distribution between indium and ruthenium is present: 1:1 order in Ba2InRuO6 (space group P3m1 ≙ D3d3; R′ = 5.3%); 1:2 order in Ba3InRu2O9 (space group P63/mmc ≙ D6h4; R′ = 4.6%).The corresponding black Rh compounds, Ba2RhRuO6 and Ba3RhRu2O9, crystallize in the rhombohedral 9 L type of BaRuO3.
    Notizen: Die schwarzen Perowskite Ba2InRu5+O6 und Ba3InRu2O9 (mittlere Ru-Wertigkeit: +4,5) kristallisieren jeweils im hexagonalen BaTiO3-Typ und bilden eine lückenlose Mischkristallreihe. Nach Intensitätsberechnungen und Analyse der schwingungsspektroskopischen Daten liegt zwischen Indium und Ruthenium eine geordnete Verteilung vor: 1:1 Ordnung in Ba2InRuO6 (R.G. P3m1 ≙ D3d3; R′ = 5,3%); 1:2 Ordnung in Ba3InRu2O9 (R.G. P63/mmc ≙ D6h4; R′ = 4,6%).Die entsprechenden, ebenfalls schwarzen Rh-Verbindungen, Ba2RhRuO6 und Ba3RhRu2O9, kristallisieren im rhomboedrischen 9 L-Typ von BaRuO3.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
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  • 3
    ISSN: 0044-2313
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: On Mixed Valent Perovskites Ba3B3+Ru24,5+O9 - Catalytic Activity of Perovskite Oxides with Noble MetalsThe black compounds Ba3B3+Ru2O9 crystallize with B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y in a hexagonal BaTiO3 structure (6 L, sequence (hcc)2) with an ordered distribution (1:2 order) of B3+ and ruthenium (BO6 single octahedra; Ru2O9 double groups). The mean oxidation state of ruthenium is about +4.5. The properties are compared with that of other isotypic stacking polytypes Ba3B3+M24,5O9 (M2 = IrRu, Ir2, PtRu) and Ba3B2+M25+O9 (M = Ru, Ir).The results of activity tests concerning the efficiency of perovskite oxides with noble metals in respect of the oxidation of CO or CHx and the reduction of NOx are reported.
    Notizen: Die schwarzen Verbindungen Ba3B3+Ru2O9 kristallisieren für B3+ = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, und Y in einer hexagonalen BaTiO3-Struktur (6 L; Sequenz (hcc)2) mit geordneter Verteilung (1:2 Ordnung) von B3+ und Ruthenium (BO6-Einzeloktaeder; Ru2O9-Doppelgruppen). Die mittlere Wertigkeit des Rutheniums liegt stets bei +4,5. Die Eigenschaften werden mit denjenigen anderer isotyper Stapelvarianten Ba3B3+M24,5+O9 (M2 = IrRu, Ir2 und PtRu) sowie Ba3B2+M25+O9 (M = Ru, Ir) verglichen.Die Ergebnisse von Aktivitäts-Tests über die Wirksamkeit von edelmetallhaltigen Sauerstoffperowskiten bei der Oxydation von CO bzw. CHx sowie der Reduktion von NOx werden mitgeteilt.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Cell & tissue research 287 (1997), S. 507-512 
    ISSN: 1432-0878
    Schlagwort(e): Key words: Laminin binding protein (LBP) ; Rapidly cycling cells ; CDC2 kinase ; Cytoplasmic localization ; Hydra vulgaris (Cnidaria) ; Chlorohydra viridissima (Cnidaria)
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract. Recently, a cDNA was isolated from hydra with extensive homology to a mammalian and invertebrate gene which codes for a protein called laminin binding protein (LBP). In this paper we describe the protein expression of the hydra LBP in Escherichia coli. On SDS gels the recombinant hydra LBP displayed an apparent molecular mass of 43 kDa, although the calculated mass, including six additional histidines, is 33.7 kDa. Polyclonal antibodies were produced against the hydra recombinant LBP. The antiserum reacted with a 42-kDa and a 43-kDa protein from Hydra vulgaris and from a multiheaded mutant of Chlorohydra viridissima, respectively. In hydra, LBP RNA and protein were highly expressed in cells with short cell cycles, such as all cells of the interstitial cell lineage, less in slowly cycling epithelial cells, and at very reduced levels or not at all in differentiated cells. Higher expression in the multiheaded mutant of C. viridissima than in H. vulgaris, the cells of which differ in doubling time, hint at a function in cell proliferation. This is supported by the finding that in vitro hydra LBP is a substrate for the cell-cycle-specific kinase CDC2.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 71 (1959), S. 736-736 
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 76 (1964), S. 439-440 
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 439-440 
    ISSN: 0570-0833
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 75 (1963), S. 878-878 
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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