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  • Polymer and Materials Science  (8)
  • Myokardinfarkt  (2)
  • live food  (2)
  • oxygen consumption  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Erhöhtes Serum-Myoglobin bei Niereninsuffizienz (1981)
    Springer
    Journal of molecular medicine 59 (1981), S. 247-248 
    Details
    ISSN: 1432-1440
    Keywords: Myoglobin ; Renal failure ; Myocardial infarction ; Myoglobin ; Niereninsuffizienz ; Myokardinfarkt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 44 Patienten mit chronischer Niereninsuffizienz unterschiedlicher Äthiologie wurde das immunreaktive Serum-Myoglobin bestimmt und mit den Werten von Probanden mit normaler Nierenfunktion verglichen. Es fand sich — unabhängig von der Grunderkrankung — eine hoch signifikante lineare Korrelation zwischen dem Serum-Myoglobin und der Serum-Kreatinin-Konzentration. Bei Patienten mit Serum-Kreatinin-Werten über 550 µMol/1 (6,2 mg-%) lagen die Serum-Myoglobin Konzentrationen fast regelmäßig im pathologischen Bereich. Dies gilt auch für chronische Dialysepatienten. Die Befunde zeigen, daß bei Patienten mit höhergradiger, chronischer Niereninsuffizienz das Serum-Myoglobin nur mit Einschränkung zur Infarktdiagnostik geeignet ist.
    Notes: Summary In 44 patients with chronic renal failure of varied etiology serum immunoreactive myoglobin was measured and compared to values obtained in patients with normal renal function. Irrespective of the underlying disease a highly significant linear correlation was found between serum immunoreactive myoglobin and serum creatinine concentration. In patients with serum creatinine concentrations above 550 µmol/1 (6.2 mg%) serum myoglobin was as a rule elevated above the range found in the controls with normal renal function. This was also true in dialysis patients. These result demonstrate that serum myoglobin may only be used with restrictions in the diagnosis of myocardial infarction in patients suffering from advanced chronic renal failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01476583
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  • 2
    Electronic Resource
    Electronic Resource
    Radioimmunologische Bestimmung von Human-Myoglobin in der Diagnostik des akuten Myokardinfarkts (1979)
    Springer
    Journal of molecular medicine 57 (1979), S. 225-235 
    Details
    ISSN: 1432-1440
    Keywords: Angina pectoris ; Diagnostic criteria ; Myocardial infarction ; Serum myoglobin ; Radioimmunoassay ; Angina pectoris ; Diagnostik ; Myokardinfarkt ; Radioimmunoassay ; Serum-Myoglobin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein Radioimmunoassay zur Bestimmung von Serum-Myoglobin (SMb) wird vorgestellt. Bei 50 gesunden Probanden beträgt der Meßwertbereich 0–90 ng/ml. Serielle Bestimmungen an 10 Patienten mit akutem Myokardinfarkt beziehungsweise Angina pectoris (AP) zeigen, daß SMb bei Myokardinfarkt vor CK und CK-MB pathologische Werte erreicht (im Mittel 250±95 ng/ml bei stationärer Aufnahme 3,3±1,4 h nach AP-Beginn). Die gleichzeitig bestimmte NAC-aktivierte CK liegt zu diesem Zeitpunkt noch im Normbereich und erreicht pathologische Werte erst 6,2±1,9 h nach Schmerzbeginn. Der Peak des Serum-Myoglobins liegt mit 506±194 ng/ml 8,8±2,8 h, der der CK mit 905±475 mU/ml 20,0±7,8 h nach Anginabeginn. CK-MB und CK unterscheiden sich im zeitlichen Verlauf nur unwesentlich. Ein Patient mit ausgeprägter AP hat bei sonst unauffälligem Enzymmuster pathologisch erhöhte SMb-Werte. Methodische und klinische Ergebnisse werden diskutiert.
    Notes: Summary A radioimmunoassay was developed to determine serum myoglobin (SMb). 50 healthy persons showed values between 0 and 90 ng/ml. Serial tests of 10 patients following acute myocardial infarction or during angina pectoris (AP) indicated that SMb reached pathological values before CK and CK-MB (average 250±95 ng/ml at the time of hospitalisation which corresponds to 3.3±1.4 h after beginning of angina pectoris). At hospitalisation the simultaneously determined CK was within normal limits and reached pathological values only 6.2±1.9 h after the onset of angina. Maximum of SMb was 506±194 ng/ml occurring 8.8±2.8 h after the beginning of AP, maximum of CK was 905±475 mU/ml occurring 20.0±7.8 h after AP. CK-MB and CK differed only slightly in their time course. One patient with severe AP had pathologically increased SMb values whilst all other enzymes were completely normal. Methodical and clinical results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477491
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Feed Type and Age-at-weaning on Growth and Survival of Clownfish Amphiprion percula (Pomacentridae) (2000)
    Springer
    Aquarium sciences and conservation 2 (2000), S. 215-226 
    Details
    ISSN: 1573-1448
    Keywords: Amphiprion percula ; clownfish ; weaning ; larval nutrition ; live food
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To simplify the weaning of clownfish Amphiprion percula from live food to artificial food, and to reduce the costs of feeding live food, three trials were undertaken to determine the best age for weaning. Twenty-nine-day-old post-hatch A. percula were weaned onto a fishmeal/caesin-based dry food which was an acceptable substitute for either Artemia or a moist food comprising Penaeus indicus and Donax serra. Larvae weaned 4 days after hatch (DAH) had lower survival than fish weaned 7 or 10 DAH. In juveniles weaned from 10 to 30 DAH good survival was obtained between 15 and 20 DAH suggesting that this is a suitable window for the weaning of this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009652021170
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of 2-phenoxyethanol and transport packing density on the post-transport survival rate and metabolic activity in the goldfish, Carassius auratus (1998)
    Springer
    Aquarium sciences and conservation 2 (1998), S. 1-7 
    Details
    ISSN: 1573-1448
    Keywords: anaesthesia ; transport techniques ; goldfish ; packing density ; oxygen consumption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To test the hypothesis that the anaesthetic 2-phenoxyethanol would reduce the metabolic rate and allow for higher transport packing densities, goldfish (3.93 +/- 5 g) were transported for 48 h at 25, 50 and 75 fish per 500 ml combined with anaesthetic concentrations of 0, 0.25 and 0.35 ml l-1. The anaesthetic did not affect the survival rate or the oxygen and ammonia concentrations. Thus, its use could not be recommended for the transport of goldfish. It is suggested that optimum packing densities be based on a minimum post-transport oxygen value of 4 mg l-1 for goldfish
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009683325104
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of 2-phenoxyethanol and transport packing density on the post-transport survival rate and metabolic activity in the goldfish, Carassius auratus (1998)
    Springer
    Aquarium sciences and conservation 2 (1998), S. 1-7 
    Details
    ISSN: 1573-1448
    Keywords: anaesthesia ; transport techniques ; goldfish ; packing density ; oxygen consumption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To test the hypothesis that the anaesthetic 2-phenoxyethanol would reduce the metabolic rate and allow for higher transport packing densities, goldfish (3.93 ± 1.99 g) were transported for 48 h at 25, 50 and 75 fish per 500 ml combined with anaesthetic concentrations of 0, 0.25 and 0.35 mll-1. The anaesthetic did not affect the survival rate or the oxygen and ammonia concentrations. Thus, its use could not be recommended for the transport of goldfish. It is suggested that optimum packing densities be based on a minimum post-transport oxygen value of 4 mgl-1 for goldfish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00466401
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  • 6
    Electronic Resource
    Electronic Resource
    Growth of Juvenile Synodontis petricola (Family: Mochokidae) Fed on a Formulated Diet, Artemia or Spirulina and Combinations Thereof (1998)
    Springer
    Aquarium sciences and conservation 2 (1998), S. 117-123 
    Details
    ISSN: 1573-1448
    Keywords: Synodontis petricola ; live food ; Spirulina ; length gain ; Mochokidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two age groups of juvenile Synodontis petricola (Group I, 0.5 years and Group II, 1.5 years) were reared on each of five diets: formulated dry diet; Artemia; Spirulina; formulated diet plus Artemia; and formulated diet plus Spirulina. Fish were fed for 84 days and weighed and measured every 14 days. Growth of S. petricola averaged 0.06 mm/day for both age groups. There was no significant difference in percent survival between the fish fed on different diets within each of the two groups but the younger fish (0.5 years) had a significantly lower survival percentage (90.3%) than those in Group II (95.3%). Fish in Group I fed on Spirulina alone grew slower than those fed only on formulated dry feed, whereas the growth rates of fish fed on other diets, or diet combinations, did not differ from each other in both age groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009606107770
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  • 7
    Electronic Resource
    Electronic Resource
    Witterungsbeständige Kunststoffe und Textilien im Automobilbau. Korrelation zwischen Frei- und GerätebewitterungSchriftfassung eines Vortrages, gehalten am 21. März 1996 in Mannheim, VDI-K-Jahrestagung „Kunststoffe im Automobilbau“  -  Teil II (1997)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 28 (1997), S. 7-14 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Weather-Resistant Plastics and Fabrics in Automotive Engineering - Correlation between Natural and Artifical Weathering - Part IIPlastics and textiles used in automotive engineering are partly exposed to extreme weathering influences. These produce an ageing of the materials and components, which can become visible e.g. in the form of cracks, color changes or deformations.The first part of this report dealed with climatic variables that are important for the ageing of polymer materials and the stresses on vehicle components due to climate.In the second part test methods used to prove the weathering resistance will be presented, first the natural weathering, then some short-time testing methods of artificial weathering. Further the correlation between natural and artificial weathering will be explained using selected examples.
    Notes: Kunststoffe und Textilien sind im Automobilbau zum Teil extremen Witterungseinflüssen ausgesetzt. Diese bewirken eine Alterung der Materialien und Bauteile, die z. B. in Form von Rissen, Farbänderungen oder Verformungen sichtbar werden kann.Im ersten Teil dieses Beitrages wurden die für die Alterung von Polymerwerkstoffen wesentlichen Klimagrößen und die hieraus resultierenden Beanspruchungen von Fahrzeugbauteilen beschrieben.Im zweiten Teil werden Methoden zur Prüfung der Witterungsbeständigkeit vorgestellt, zunächst die Freibewitterung, bei der die Prüfobjekte der natürlichen Witterung ausgesetzt sind, danach einige Kurzzeitprüfmethoden, die auf künstlich in Geräten erzeugten Klimata basieren. Anschließend wird die Korrelation zwischen Frei- und Gerätebewitterung anhand ausgewählter Beispiele dargestellt.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19970280106
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  • 8
    Electronic Resource
    Electronic Resource
    Electrochemical behaviour and hydride embrittlement evaluation of titanium during cathodic polarization in HNO3/UO22+/N2H5+ solutions (1989)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 40 (1989), S. 695-702 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Untersuchungen zum elektrochemischen Verhalten und zur Hydridversprödung von Titan bei kathodischer Polarisation in HNO3/UO22+/N2H5+ -LösungenIm Zusammenhang mit dem Einsatz elektrochemischer Methoden bei der Wiederaufarbeitung von Kernbrennstoffen wird das allgemeine elektrochemische Verhalten von Titan-Kathoden und das mögliche Problem ihrer Hydridversprödung untersucht. In Abwesenheit von γ-Strahlung wird gezeigt, daß die Elektrodenpotentiale galvanostatisch polarisierter Titan-Kathoden in HNO3/UO22+/N2H5+-Lösungen Werte annehmen, die von der Stromausbeute der Nitratreduktion abhängen und entweder im Passivbereich, im Aktiv-Passiv-Übergang oder im Bereich der Wasserstoffabsorption bzw. Hydridbildung liegen, Gesteuert vom Bedeckungsgrad der Elektroden mit Wasserstoff erfolgt das Hydridwachstum entweder in der Form einer zusammenhängenden Schicht und-oder durch die Bildung einzelner Platten. Infolge eines parabolischen Wachstumsgesetzes blieb nach 1000 h Polarisationsdauer die maximale Eindringtiefe des Hydrids auf Werte kleiner 100 μm, d.h. auf den unmittelbaren Bereich der Elektrodenoberfläche beschränkt. An normalen Zugproben war dementsprechend kein signifikanter Duktilitätsverlust nachweisbar.
    Notes: In conjunction with reprocessing of nuclear fuels by electrochemical methods, the general electrochemical behaviour of titanium cathodes and the problem of their hydride embrittlement have been investigated in the absence of γ-radiation in HNO3/UO22+/N2H5+ solutions of varying composition. The electrode potential of galvanostatically polarized titanium cathodes is shown to be located either in the passive range, within the passive-to-active transition, or in the regime of hydrogen absorption/hydride formation, depending on the current yield of the nitrate reduction reaction. Hydride growth was observed predominantly in the morphology of continuous layers and/or isolated platelets. Following a parabolic rate law it was restricted to the vicinity of the electrode surface, the maximum penetration for polarization times up to 1000 h being less than 100 μm. As a consequence, no significant loss of ductility of normal tensile specimens could be detected under these conditions.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19890401202
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  • 9
    Electronic Resource
    Electronic Resource
    De-alloying and dissolution induced cracking of the Zinc-iron δ phaseDedicated to Professor Dr. Elsbeth Wendler-Kalsch on the occasion of her 60th birthday (1996)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 47 (1996), S. 34-41 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Selektive Korrosion und korrosionsinduzierte Rißbildung der δ Phase des Systems Zink-EisenIn schwach sauren Sulfatlösungen wurde die selektive anodische Auflösung von Zink aus der spröden δ Phase des Systems Zink-Eisen untersucht. Anhand elektrochemischer Messungen, licht- und rasterelektronenmikroskopischer Untersuchungen, Elektronenstrahl-Mikroanalyse und Röntgendiffraktometrie wird gezeigt, daß dieser Prozeß Konzentrationsgradienten in der Legierungsphase erzeugt, die einen lokalen Spannungszustand hervorrufen und dadurch zur Rißbildung führen. Durch das Zusammenspiel von selektiver Korrosion und Rißbildung wird die Zerstörung der δ Phase erheblich verstärkt. Eine diffusionsgesteuerte Bildung der eisenreicheren Phasen Γ1 und Γ wird nicht beobachtet. Die ultimative Korrosionsmorphologie bei der Entzinkung der δ Phase ist vielmehr eine Schwammstruktur, die anscheinend aus porigem Ferrit besteht, dessen Zinkkonzentration seine Raumtemperatur-Löslichkeit erheblich überschreitet.
    Notes: The preferential anodic dissolution of zinc from the brittle zinciron δ phase has been investigated in acidified sulphate solutions. From electrochemical measurements, light optical and scanning electron microscopy, electron microprobe analysis and X-ray diffraction experiments it is deduced that this process results in the formation of considerable concentration gradients within the alloy phase that set up a local state of stress and thus induce the formation of cracks. By the interplay of de-alloying and crack propagation the corrosion degradation of the δ phase is significantly enhanced. Diffusion driven phase transformations to form the iron-rich intermediate phases, Γ1 and Γ, were not observed. The ultimate corrosion morphology that results from the de-alloying of the δ phase is rather a sponge structure which appears to consist of porous ferrite with a zinc concentration that considerably exceeds its room temperature solubility limit.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19960470106
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  • 10
    Electronic Resource
    Electronic Resource
    Mechanismen der selektiven elektrolytischen Korrosion homogener Legierungen (1980)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 31 (1980), S. 347-353 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Mechanisms of the selective electrolytical corrosion of homogeneous alloysThe problem of the selective removal of less noble components during the anodic dissolution of alloys is surveyed. For the case of binary alloys containing a noble metal component the characteristic polarization curves and the presently discussed mechanisms of the preferential dissolution of the less noble component are presented. A critical comparison between various experimental results yields some aspects in favour of the surface diffusion mechanism. A recent attempt to calculate the polarization curve of a preferentially corroding noble metal alloy is explained.
    Notes: In Form eines Überblicks wird das Problem der selektiven Auflösung unedler Legierungskomponenten erörtert. Am Beispiel der Korrosion edelmetallhaltiger Legierungen werden dabei charakteristische Stromspannungskurven besprochen und die derzeit diskutierten Mechanismen der selektiven Korrosion homogener Legierungen vorgestellt. Der kritische Vergleich verschiedener experimenteller Ergebnisse ergibt einige Gesichtspunkte, die für das Vorherrschen eines Oberflächendiffusionsmechanismus sprechen. Ein unlängst unternommener Versuch zur Berechnung der anodischen Stromspannungskurven edelmetallhaltiger Legierungen wird erläutert.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19800310504
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