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  • 1
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    Am. Soc. for Testing and Materials
    In:  Bull., Polar Proj. OP-O3A4, Fracture Analysis - A Symp. Sponsored by ASTM Committee E-24, Philadelphia, Pa., Aug. 27-29, 1973, Leiden, The Netherlands, Am. Soc. for Testing and Materials, vol. 560, no. XVI:, pp. 2-28, (ISBN: 3-540-23712-7)
    Publication Date: 1974
    Keywords: Energy (of earthquakes) ; Rock mechanics ; Fracture ; mixed ; mode ; cracks and fractures (.NE. fracturing)
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 51 (1979), S. 1420-1425 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 39 (1974), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Reduced quality and availability of traditional tinned retail containers for pure maple sirup has prompted the appearance of plastic containers for this product. Tests which four sirups were stored 6 months in glass, metal and two types plastic containers at three temperatures showed that the sirups in both plastics darkened significantly more than in the other containers during the storage, and a significant interaction between temperature and container was shown. The possibility of a sirup falling to the next lower USDA grade during storage is pointed out.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: — Portions of a distinctively flavored commercial maple sirup were heated by autoclaving at 15 psig (250°F) for 1.5 and 4 hr. A GLC flavor profile of the treated and untreated sirups showed that 25 components in their flavor fractions changed in relative amounts. In the light colored original sirup, acetol and compounds related to lignin (vanillin, syringaldehyde, dihydroconiferyl alcohol) predominated. As the sirup was heated, carbohydrate breakdown products began to appear and then to predominate (acetol, furanones, cyclotene, and HMF). As the carbohydrate degradation products increased the sirup darkened in color and became acrid in flavor; at this point vanillin began to decrease. From this preliminary study it would seem possible, after identifying all the compounds in the profile, to produce various levels of different flavor in maple sirup by a regulated heat process. The need is indicated for a complete study of the production of maple flavorants by heat, starting with a flavorless sap concentrate.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tumours were induced in Sprague-Dawley rats by injecting carrier-free 32P-orthophosphate according to a schedule which has been shown6 to lead to a high incidence of osteogenic sarcoma development. After an initial intra-peritoneal injection of 1 mCi per g body weight, six subsequent injections of ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 20 (1978), S. 445-446 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 21 (1979), S. 787-790 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Foundations of physics 8 (1978), S. 833-843 
    ISSN: 1572-9516
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We explore the mathematical structure and the physical implications of a general four-dimensional symmetry framework which is consistent with the Poincaré—Einstein principle of relativity for physical laws and with experiments. In particular, we discuss a four-dimensional framework in which all observers in different frames use one and the same grid of clocks. The general framework includes special relativity and a recently proposed new four-dimensional symmetry with a nonuniversal light speed as two special simple cases. The connection between the properties of light propagation and the convention concerning clock systems is also discussed, and is seen to be nonunique within the four-dimensional framework.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 13 (1977), S. 721-724 
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 9 (1973), S. 405-420 
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé Le modèle plastique de Dugdale applicable aux feuillards est étendu au cas des plaques soumises à flexion pure, en utilisant une superposition des facteurs d'intensité des contraintes. La validité de cette extension est vérifiée par des essais sur du polycarbonate, sur de l'acier doux et sur un alliage Fe−3Si. Dans l'analyse, on considère à la fois les théories des plaques du quatrième ordre et du sixième ordre. On montre que la théorie du sixième ordre fournit les mêmes résultats qu'une solution précédemment obtenue sur la base de fonctions de contraintes résultant de la théorie du quatrième ordre, en raison d'une particularité de cette solution. On discute les effets qu'entrîne la fermeture de la fissure, qui n'est pas considérée dans le modèle, sur l'accord entre les efforts déterminés par voie analytique et par voie expérimentale.
    Abstract: Zusammenfassung Das plastische Modell von Dugdale für Bänder wird erweitert auf den Fall von Platten unter reiner Biegebeanspruchung durch Überlagerung von Spannungsintensitätsfaktoren. Versuche auf Polycarbonate auf Baustahl und auf Silikonstahl, die die Gültigkeit des erweiterten Modells herausheben, werden erläutert. In der Untersuchung wird sowohl die Plattentheorie des vierten wie des sechsten Grades berücksichtigt. Es wird bewiesen daß die Theorie des sechsten Grades die selben Ergebnisse gibt wie die einer früheren Lösung, die sich auf die Theorie des vierten Grades begründet, dank einer Partikularität dieser früheren Lösung. Die Effekte der Riß-schliessung, die in diesem Modell nicht berücksichtigt wird, werden diskutiert in Hinsicht der Übereinstimmung der experimentel oder analytisch aufgestellten Kräfte.
    Notes: Abstract The Dugdale strip yielding model is extended to include plates under pure bending utilizing a superposition of stress intensity factors. Experiments on polycarbonate, mild steel and silicon iron are reported which validate the extended model. In the analysis both 4th and 6th order plate theories are considered. It is demonstrated that the 6th order theory gives the same results as an earlier solution obtained on the basis of stress functions developed from 4th order theory due to a peculiarity of the earlier solution. The effects of crack closure, not accounted for in the model, are discussed in relation to the agreement between analytical and experimental efforts.
    Type of Medium: Electronic Resource
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