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  • 1
    facet.materialart.
    Unknown
    Moisture effects on the toughness, mode-I and mode-II of particles filled quasi-isotropic glass–fibre reinforced polyester resin composites (1998)
    Springer
    Details
    Publication Date: 1998-03-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 2
    facet.materialart.
    Unknown
    Damage performance of particles filled quasi-isotropic glass–fibre reinforced polyester resin composites (1998)
    Springer
    Details
    Publication Date: 1998-03-01
    Print ISSN: 0022-2461
    Electronic ISSN: 1573-4803
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on mixing time in bubble columns with pseudoplastic (carboxymethyl)cellulose solutions (1987)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 26 (1987), S. 82-86 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00061a015
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Occurrence of Graywacke in the Lower Siwaliks, Simla Hills (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 566-567 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It is well known that the two distinctive features of a graywacke are its texture and composition. The authors made no precise mention of the texture of the rock although, according to Pettijohn2, "it alone distinguishes graywacke from all other sandstones". The description of the composition of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/194566b0
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  • 5
    Electronic Resource
    Electronic Resource
    Superconductivity and structure of quench condensed Al-Cu-films (1978)
    Springer
    The European physical journal 29 (1978), S. 199-202 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In situ electron diffraction patterns of quench condensed Al-Cu-films with Cuconcentrations between 0 and 20 at % Cu are taken immediately after the condensation onto a substrate at 4 K and during annealing up to 330 K. Films with Cu-concentrations higher than 10 at % are build up as an amorphous phase. In connection with the occurence of the amorphous state the transition temperatureT c increases to values as high as 4.4 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01321183
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  • 6
    Electronic Resource
    Electronic Resource
    On a new division algorithm (1977)
    Springer
    BIT 17 (1977), S. 481-485 
    Details
    ISSN: 1572-9125
    Keywords: Division algorithm ; Approximate quotient ; Approximation to the reciprocal of the divisor ; Quasi Serial Multiplier ; Iterative formula
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A method for digital division is described. In this method the reciprocal of the divisor is first determined approximately by a third order iterative equation. Each multiplication in this equation is then performed by the Quasi Serial Multiplier method. The reciprocal of the divisor, thus obtained is finally multiplied by the dividend, using the same method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01933458
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  • 7
    Electronic Resource
    Electronic Resource
    Induction of metachromasia by cationic metal coordinates (1978)
    Springer
    Transition metal chemistry 3 (1978), S. 38-42 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new class of cationic metal complexes (chromotropes) of cobalt, chromium and copper has been found to induce true metachromasia in methyl blue (anionic dye). These novel species produced a stronger metachromatic reaction than do known chromotropes. The spectral shifts and meta-chromatic effects were found to increase with increasing chromotropes to dye (methyl blue)ratios. The metachromatic reactions were suppressed by versene, urea, propanol
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01393502
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  • 8
    Electronic Resource
    Electronic Resource
    Notched strength of carbon fibre/epoxy composite laminates with a circular hole (2000)
    Springer
    Forschung im Ingenieurwesen 65 (2000), S. 295-300 
    Details
    ISSN: 1434-0860
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology
    Description / Table of Contents: Zusammenfassung In diesem Artikel wird eine verbesserte Form der Bruchspannungskriterien von Whitney und Nuismer vorgestellt, die für die Berechnung der Spannungen in Verbundíaminaten verwendet wird, weiche eine runde Öffnung aufweisen. Der Ansatz mit einem lokalen spannungskriterium geht davon aus, daß ein Versagen des Werkstoffes dann auftritt, sobald die Spannung in einer bestimmmten Entfernung d 0 von der Kerbe die Festigkeit des ungekerbten Laminates übserschreitet. Der Ansatz des mittieren Spannungskriterium legt zugrunde, daß ein Materialversagen dann auftritt, wenn die mittiere Spannung in einer bestimmten Entfernung a 0 von der Einkerbung die Festigkeit des ungekerbten Laminates überschreitet. Beide Bruchspannungsansätze sind zweiparametrische Berechnungsansätze basierend auf der Festigkeit σ0 des kerbfreien Material und einer charakteristischen Länge d 0 bzw. a 0. Eine relativ einfache Beziehung wird für die Bestimmung der charakteristischen Länge eingeführt, um die Berechnung der Kerbfestigkeit von Kohlefaser/Epoxid-Verbund-Laminaten zu verbessern. Die erhaltenen, analytischen Ergebnisse stimmen gut mit den verfügbaren Meßwerten von AS4-carbon/948 A1 epoxy [0/90]4 S and [0/±45/90]2 S Verbund-Laminaten unterschiedlicher Abmessungen überein.
    Notes: Abstract  This paper improves the two stress fracture criteria proposed by Whitney and Nuismer (known as the point stress criterion and the average stress criterion) to predict the strength of composite laminates with a circular hole. In the point stress criterion, it is assumed that the failure occurs when the stress over some distance (d 0) away from the notch is equal to or greater than the unnotched laminate strength. In the average stress criterion it is assumed that failure occurs when the average stress over some distance (a 0) ahead of the notch equals the unnotched laminate strength. Both stress fracture criteria are two parameter models based on the unnotched strength (σ0) and a characteristic dimension (d 0 or a 0). A simple relation is used for the characteristic length to improve the accuracy while evaluating the notched strength of carbon/epoxy composite laminates. The analytical results are compared well with the existing test results of AS4-carbon/948 A1 epoxy [0/90]4 s and [0/±45/90]2 S composite laminates with various hole diameters and specimen widths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100100000027
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  • 9
    Electronic Resource
    Electronic Resource
    Tensile fracture behaviour of notched boron/aluminum composite laminates (2000)
    Springer
    Forschung im Ingenieurwesen 66 (2000), S. 24-30 
    Details
    ISSN: 1434-0860
    Source: Springer Online Journal Archives 1860-2000
    Topics: Technology
    Description / Table of Contents: Zusammenfassung  Mit diesem Artikel wird eine erweiterte Form des Bruchspannungkriteriums von Whitney und Nuismer vorgestellt, das für die Vorhersage der Zugfestigkeit von Verbundlaminaten eingesetzt wird, welche Löcher bzw. Risse aufweisen. Eine relativ einfache Beziehung für die charakteristische Länge in Abhängigkeit von der Rissgröße ermöglicht eine deutliche Genauigkeitsverbesserung bei der Festigkeitsberechnung. Die Güte dieser Gleichung wird durch den ausführlichen Vergleich mit Meßdaten belegt. Weiterhin führt der Einsatz der vorgestellten Methodik zu einer guten Übereinstimmung mit exprimentellen Ergebnissen des Bruchverhaltens von Verbundlaminaten mit lochartigen Strukturen, wodurch die Richtigkeit der gewählten Vorgehensweise bestätigt wird.
    Notes: Abstract   This paper presents modifications in the stress fracture criteria (known as the point stress criterion and the average stress criterion), developed by Whitney and Nuismer to predict the tensile strength of composite laminates containing holes and cracks. A simple relation is used for the characteristic lengths to take care of the notch size dependence, which can improve the accuracy while evaluating the notched strength of composite laminates. The applicability of the simple relation is examined by considering a good amount of fracture data on boron/aluminium laminates. The present procedure correlates well with the test data on circular hole specimens as well as various cracked configurations and confirms that the approach can be applied for tensile strength estimations of notched composite laminates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100100000032
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  • 10
    Electronic Resource
    Electronic Resource
    Biochemical and pathological effects of fly ash on lung, liver, and blood of rats (1984)
    Springer
    Archives of environmental contamination and toxicology 13 (1984), S. 441-452 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The intratracheal administration to rats of fly ash particles (≤5 μm) collected from the electrostatic precipitator of a thermal power plant was the basis for a study on the hematology, blood chemistry, and histopathology of the lung and liver in the rats. The most characteristic effect of fly ash was a reduction in white blood cell (WBC) counts, which was dose-dependent and it persisted up to 120 days after administration of 5 mg fly ash. Dose-dependent reductions were also observed in red blood cell (RBC) counts and hemoglobin levels; reductions were also observed 30 days after administration of the specified dose. A dose-dependent increase in lymphocytes and a decrease in polymorphonuclear leucocytes and monocyte counts was apparent. These effects were reversible after 60 days. The administration of glass beads (≤5 μm) did not alter the rat blood hematology. A dose-dependent increase in the blood glucose levels, the activity of glutamate pyruvate transaminase (GPT), a decrease in the activities of glutamate oxaloacetate transaminase (GOT) and alkaline phosphatase was observed in fly ash-treated rats. Fly ash significantly increased blood glucose levels and decreased uric acid levels and the activities of GOT and acid phosphatase 15 days after administration. Glass beads did not affect the blood chemistry of the rats. No discernible effect was apparent on deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and protein of the lung and liver. Histopathology of the lung revealed an inflammatory response. Fly ash-laden macrophages were present in large number in early periods but their number decreased with time. Thickening of the alveolar septa occurred. Periodic Acid Schiff's (PAS) staining of lung was positive, indicating alveolar lipoproteinosis. Fly ash particles were present in the hepatic sinusoids and central veins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056260
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