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  • 1985-1989  (3)
  • 1900-1904  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 102 (1986), S. 195-202 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Sweat samples collected from different places of the body of four normal and five Cf children were analyzed by PIXE. Comparison were made of sweat rates and sweat thresholds in these two groups of subjects. After presentation of the protocol of the sweat test, sample preparation and PIXE analysis of sweat samples are described. Statistical analysis of data is also developed. Six elements (Na, Cl, Mn, Cu, Br and Ca) are found to be significantly different between the two groups. A multiple regression analysis allows to obtain an equation of the state of health for each patient.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 33 (1988), S. 15-28 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Kalorimetrische Hochtemperaturmethoden zur Anwendung in der Metallurgie werden diskutiert. Zwei isoperibole Mischungskalorimeter werden vorgestellt. Sie erlauben die direkte Bestimmung der Mischungsenthalpie flüssiger Legierungen in Abhängigkeit von der Konzentration und Temperatur und ihrer Ableitung nach der Zusammensetzung bei Temperaturen bis 1300 bzw. 2000 K. Ein Hochtemperatur-Lösungskalorimeter, in dem ein flüssiges Metall oder eine flüssige Legierung als Badflüssigkeit dient (Maximaltemperatur 1800 K), kann zur Bestimmung der Bildungswärme fester Legierungen und zur Messung der partiellen Mischungsenthalpie bei unendlicher Verdünnung verwendet werden. Mit einem Einwurf-Kalorimeter können thermodynamische Eigenschaften sehr reaktiver Legierungssysteme gemessen werden. Thermodynamische Messungen schwerschmelzbarer Metalle und Legierungen bei Temperaturen bis 4000 K sind möglich mit der Schwebe-Kalorimetrie.
    Abstract: резуме Обсуждены высокотем пературные калориметрические м етоды, используемые в металлургии. металлургии. Представлено два тип а изопериболических калориметров, позвол яющих непосредствен но определять энтальпи ю смещения жидких спл авов в зависимости от конце нтрации и температур ы, а также измерять конц ентрационную зависи мость ее производной до темпе ратур, соответственн о, 1300 и 2000 К. Высокотемперату рный жидкостной кало риметр, где в качестве ванны используется ж идкий металл или спла в, может быть использован для опре деления теплоты образования твердых сплавов и для измерен ия парциальной энтальп ии смешения при беско нечном разбавлении. С капель ным калориметром пре дставляется возможным измерять т ермодинамические свойства очень реакц ионноспособных спла вов. Термодинамические и змерения высокоплавящихся ту гоплавких металлов и сплавов могут быть осуществл ены метдом поплавков ой калориметрии до темп ературы 4000 К.
    Notes: Abstract High temperature calorimetric methods used in metallurgy are discussed. Two types of isoperibolic mixing calorimeters are presented. They allow to determine directly the enthalpy of mixing of liquid alloys as a function of concentration and temperature and to measure the derivative as a function of concentration for temperatures up to 1300 K and 2000 K, respectively. A high temperature solution calorimeter in which a liquid metal or alloy is used as the bath (maximum temperature 1800 K) can be used to determine the heat of formation of solid alloys and to measure the partial enthalpy of mixing at infinite dilution. With a drop calorimeter it is possible to measure the thermodynamic properties of highly reactive alloy systems. Thermodynamic measurements of high melting refractory metals and alloys for temperatures up to 4000 K can be achieved with levitation calorimetry.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 24 (1989), S. 2369-2379 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of rapid solidification on the corrosion behaviour in aerated 0.001 M NaCl solution of Mg-Al alloys containing 9.6 to 23.4wt% AI has been investigated in comparison with chill-cast material. Polarization studies show that rapid solidification decreases corrosion current by up to two orders of magnitude corresponding to a corrosion rate of 6 to 11 mil y−1. Increasing the aluminium content in solid solution by rapid solidification gave rise to a steep increase in pitting potential between 10 and 23 wt% Al and resulted in development of an anodic plateau at ∼ 30μAcm−2 attributable to magnesium depletion for the alloy surface and formation of a protective film. Chemical analysis of the electrolyte as a function of dissolution time for the rapidly solidified material indicated that initially only magnesium dissolved and that this dissolution of magnesium ceased within 2 to 5 min. The results indicate the formation of an aluminium-enriched interdiffusion zone at the surface underlying a more stable surface oxide than for ingot-processed Mg-Al-based alloys.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 33 (1900), S. 1073-1081 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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