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  • 1
    Electronic Resource
    Electronic Resource
    Fluoride uptake in dentin with and without simulating dentinal fluid flow (1997)
    Springer
    Clinical oral investigations 1 (1997), S. 125-130 
    Details
    ISSN: 1436-3771
    Keywords: Key words Fluoride ; Dentin ; Dentinal fluid flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007840050023
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  • 2
    Electronic Resource
    Electronic Resource
    A new biochemical marker for foot-specific cell differentiation in hydra (1985)
    Springer
    Development genes and evolution 194 (1985), S. 453-461 
    Details
    ISSN: 1432-041X
    Keywords: Hydra ; Peroxidase activity ; Foot cell differentiation ; Foot activator ; Foot inhibitor ; Head inhibitor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Mucous cells in the basal disk of hydra contain a peroxidase-like enzyme allowing specific staining of these cells with substrates for peroxidases. The peroxidase activity provides an excellent marker for foot mucous cell, differentiation and was used to follow the reappearance of footspecific cells during foot regeneration after amputation. By choosing the appropriate either soluble or precipitable substrate the peroxidase reaction was used both for a qualitative and for a quantitative evaluation of foot-specific differentiation in hydra. For histological studies diaminobenzidien was found to be a suitable substrate which forms a dark brown precipitate within the cells containing the peroxidase activity. For a quantitative evaluation of foot regeneration the soluble substrate 2,2-azino-di(3-ethyl-benzthiazoline-sulfonic acid-6) ammonium salt was used which after reaction with the enzyme gives rise to a diffusible green reaction product the concentration of which can be measured by its specific absorption at 415 nm. Based on the diffusible enzyme product a new quantitative assay for foot regenration was developed and applied to confirm the effect and specificity of morphogenetic substances which either inhibit or activate foot or head regeneration in hydra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00868146
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  • 3
    Electronic Resource
    Electronic Resource
    The head and the foot inhibitor from hydra are not dowex artefacts (1984)
    Springer
    Development genes and evolution 193 (1984), S. 117-118 
    Details
    ISSN: 1432-041X
    Keywords: Hydra ; Regeneration ; Head inhibitor ; Foot inhibitor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In a recent publication in this journal (Berking 1983) it was claimed (1) that the head inhibitor we isolated from hydra is a Dowex artefact, (2) that a separate foot inhibitor does not exist in hydra and (3) that the only inhibitor that has so far been isolated from hydra is one which inhibits head and foot regeneration equally well. These statements are incorrect and require a response. In the following, I would like to summarise our evidence that the inhibitors isolated from hydra, including Berking's inhibitor, have different specificities for head and foot regeneration. In addition, I would like to show that none of our substances are Dowex artefacts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00848640
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  • 4
    Electronic Resource
    Electronic Resource
    Imidazolide der Phosphorsäure (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 71 (1959), S. 736-736 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19590712305
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  • 5
    Electronic Resource
    Electronic Resource
    Selektive Hydrolyse von Pyrophosphat-Bindungen neben Phosphorsäurediester-Bindungen in Polynucleotiden (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 76 (1964), S. 439-440 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19640761022
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular Genetics (in 2 Teilen), herausgeg. von J. H. Taylor. Bd. 4 der Reihe: Molecular Biology, an International Series of Monographs and Textbooks, herausgeg. von N. O. Kaplan und H. A. Scheraga. Academic Press, New York-London 1963. 1.Aufl., XII. 544 S., zahlr. Abb., geb. $ 14.50 (1963)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 75 (1963), S. 1143-1143 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19630752222
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  • 7
    Electronic Resource
    Electronic Resource
    Ribonucleoproteins and Ribonucleic Acids, Preparation and Composition, von F. W. Allen. Elsevier Publishing Co., Amsterdam-New York 1962. 1. Aufl., V, 182 S., 57 Tab., geb. hfl. 17.50 (1963)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 75 (1963), S. 878-878 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19630751834
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  • 8
    Electronic Resource
    Electronic Resource
    Über Ruthenium-Perowskite vom Typ Ba2BRuO6 und Ba3BRu2O9 mit B = Indium, Rhodium (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 473 (1981), S. 178-188 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 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.
    Notes: 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.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814730220
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  • 9
    Electronic Resource
    Electronic Resource
    Über gemischtvalente Ruthenium-Perowskite Ba3B3+Ru24,5+O9 - zur katalytischen Aktivität von Sauerstoffperowskiten mit vier- und fünfwertigen Edelmetallen (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 481 (1981), S. 143-152 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 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.
    Notes: 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.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814811016
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  • 10
    Electronic Resource
    Electronic Resource
    Selective Hydrolysis of Pyrophosphate Bonds in Polynucleotides (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 439-440 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196404392
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