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  • 1
    Electronic Resource
    Electronic Resource
    A comparison of plasma levels of phosphoprotein, total protein and total calcium as indirect indices of exogenous vitellogenesis in the crucian carp, Carassius carassius (L.)
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 80 (1985), S. 913-916 
    Details
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(85)90483-3
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Toxicity-Based Consent and the Wider Application of Direct Toxicity Assessment to Protect Aquatic Life (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 9 (1995), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This paper describes the value of, and progress towards, introducing direct toxicity assessment procedures for use in water quality management within the UK. The capabilities and limitations of direct toxicity assessment are compared with those of the conventional substance-specific control and bio-assessment measures. Progress towards the introduction of toxicity-based consents, following an agreed strategy and standardized procedures, is reported together with the wider application of direct toxicity assessment to monitor the receiving environment. Finally, the selection of suitable ecotoxicological methods and their further development for direct toxicity assessment, are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1995.tb01491.x
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  • 3
    Electronic Resource
    Electronic Resource
    A survey of U.K. centres on implant failures (1999)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 26 (1999), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This study investigated the experience of endossoseus implants in the U.K. – how success rates compare with other countries; the common causes of failure; early detection, definition and treatment of the failing implant. Information was gathered by means of a questionnaire sent to 120 centres in the U.K. Thirty-nine centres responded to the survey, reporting on a total of 5328 implants which had been placed over an average time period of 6·5 years. A mean failure rate of 4·3% was reported in the mandible with 16% in the maxilla. The survey showed that 11 different implant systems were in use and that implants were used to support an overdenture in 56% of cases, and bridgework in 26%. The definition of the failing implant and the causes of failure were unclear, with a wide range of opinions given. A combination of methods were used to treat the failing implant including surgical techniques and chemotherapeutic agents, but the long-term success of these treatments was uncertain. Failure rates especially in the maxilla at some of the centres appear higher than have been previously suggested in the U.K. or abroad. Universal agreement on the criteria for ‘success’ and ‘failure’ of fixtures is needed along with agreed treatment protocols for the failing implant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.1999.00355.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Design and construction of the CDF central tracking chamber
    Amsterdam : Elsevier
    Nuclear Instruments and Methods in Physics Research Section A: 268 (1988), S. 50-74 
    Details
    ISSN: 0168-9002
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9002(88)90593-1
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal analysis of manganese dioxide in controlled atmospheres (1971)
    Springer
    Journal of thermal analysis and calorimetry 3 (1971), S. 43-48 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Etude deγ-MnO2 par TG et par ATD, dans l'azote, dans l'air et dans l'oxygène. Entre 450 et 600° on observe la réaction MnO2→Mn2O3 et entre 750 et 1100° Mn2O3→ →Mn3O4. La pression partielle de l'oxygène influence la température de la décomposition. A ∼1200°, il apparaît un phénomène endothermique undépendant de la nature de l'atmosphère et qui ne s'accompagne d'aucune variation de poids. C'est pourquoi il est attribué à une transformation polymorphique de Mn3O4 plutôt qu'à la formation de MnO. Celle-ci s'observe en TG au-dessus de 1400°, dans l'azote, mais ne se produit pas par chauffage dans l'oxygène jusqu'à 1500°.
    Abstract: Zusammenfassung Die TG und DTA Kurven vonγ-MnO2 wurden in Stickstoff, Luft und Sauerstoff ermittelt. Die Umwandlungen MnO2→ Mn2O3 und Mn2O3 → Mn3O4 wurden im Temperaturbereich von 450° bis 600° bzw. 750° bis 1100° beobachtet. Die Zersetzungstemperaturen werden durch den partiellen Sauerstoffdruck beeinflußt. Der endendothermische Vorgang von ∼1200° bleibt von der Atmosphäre unbeeinflußt, ist mit keinem Gewichtsverlust verbunden. Er ist eher einer polymorphen Umwandlung von Mn3O4 als der Bildung von MnO zuzuschreiben. Die Bildung von MnO wurde thermogravimetrisch in Stickstoff oberhalb 1400° beobachtet, nicht jedoch in Sauerstoff bis zu 1500°.
    Notes: Abstract TG and DTA curves ofγ-MnO2 have been obtained in nitrogen, air and oxygen. The reactions MnO2→Mn2O3 and Mn2O3→ Mn3O4 were observed in the ranges 450° to 600° and 750° to 1100° respectively, and the decomposition temperatures are affected by the partial pressure of oxygen. The endotherm at ∼1200° is unaffected by the atmosphere and is not accompanied by weight loss. It is, therefore, due to a polymorphic transformation of Mn3O4 rather than formation of MnO. Reaction to form MnO was observed by TG in nitrogen above 1400°, but did not occur on heating in oxygen to 1500°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01911769
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of procedural variables on TG, DTG and DTA curves of calcium carbonate (1991)
    Springer
    Journal of thermal analysis and calorimetry 37 (1991), S. 2003-2019 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bei der Zersetzung von A.R. Calciumcarbonat bzw. Kalkstein wurde der Einflu\ der Versuchsparameter, einschlie\lich Probenmasse, Aufheizgeschwindigkeit, Partikelgrö\e und Partialdruck von CO2 auf den Verlauf der TG-, DTG- und DTA-Kurven untersucht. Diese Parameter haben einen deutlichen Einflu\ auf DTG und DTA, der sich in beiden FÄllen im gleichen Ausma\ bemerkbar macht. Der Einflu\ der Masse bzw. Tiefe einer unverdünnten Probe Äu\ert sich in einem Ansteigen des Partialdruckes von Kohlendioxid innerhalb des reagierenden Pulvers und wird als Bett-Tiefen-Effekt bezeichnet. Dieser Effekt kommt in Stickstoff besonders zur Geltung und tritt in Kohlendioxid in den Hintergrund. Inerte Verdünnungsmittel haben einen nur geringen Effekt auf die TG-Kurve aber eine Änderung der Zusammensetzung des inerten TrÄgergases verursacht VerÄnderungen, die auf der WÄrmeleitfÄhigkeit des Gases begründet sind. Wasserdampf verursacht, da\ DTG- und DTA-Signale bei niedrigeren Temperaturen auftreten.
    Notes: Abstract The effect of procedural variables, including sample mass, heating rate, particle size and partial pressure of carbon dioxide, on TG, DTG and DTA curves for the decomposition of A. R. calcium carbonate and limestone has been studied. Such variables have a marked effect, similar in magnitude for both DTG and DTA. The effect of sample mass, or depth of undiluted sample, is shown to be due to an increase in the partial pressure of carbon dioxide within the reacting powder and has been called the bed-depth effect. This effect is most pronounced in nitrogen but is much reduced in carbon dioxide. Inert diluents have little effect on the TG curves but changing the composition of the inert carrier gas causes variations which are correlated with the thermal conductivity of the gas. Water vapour causes a lowering of the DTG and DTA peak temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01905576
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