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  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Wärmeübertragung und Druckabfall in keramischen Schaumstrukturen bei erzwungener Strömung (1993)
    Springer
    Heat and mass transfer 28 (1993), S. 259-266 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Abstract The convective heat transfer coefficient and pressure drop in ceramic foam structures are measured. Cordierite foams with 10, 20, 30 und 50 pores per inch (PPI) at empty tube velocities (of air) at 0.5 to 14 m/s are investigated. The convective heat transfer between fluid and substrate is described well within this velocity range by means of the assumptionNu=¢ ·Re m · Pr 1/3. The experimental method developed to obtain the values of ¢ andm is described. The data thus gained are discussed in view of an application of ceramic foams as catalyst supports and are compared with data of conventional parallel channel monoliths mentioned in the literature.
    Notes: Zusammenfassung Der konvektive Wärmeübergangskoeffizient und der Druckabfall in keramischen Schaumstrukturen werden gemessen. Es werden Cordierite-Schäume mit 10, 20, 30 und 50 Poren pro inch (PPI) bei Leerrohrgeschwindigkeiten (Luft) von 0,5 bis 14 m/s untersucht. Der konvektive Wärmeübergang zwischen Fluid und Feststoff wird in diesem Geschwindigkeitsbereich mit dem AnsatzNu=¢ ·Re m · Pr 1/3 gut beschrieben. Die zur Bestimmung der Parameter ¢ undm erarbeitete Meßmethode wird erläutert. Die damit erhaltenen Daten werden im Hinblick auf die Verwendung von keramischen Schäumen als Katalysatorträger diskutiert und mit Literaturdaten von herkömmlichen Parallelkanal-Monolithen verglichen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539491
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Radiale Stoffdispersionskoeffizienten in durchströmten keramischen Schäumen (1993)
    Springer
    Heat and mass transfer 29 (1993), S. 125-127 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Abstract The radial mass dispersion coefficient of ceramic foam structures with pore finesses of 10, 20, 30 and 50 PPI (pores per inch) in convective flow is determined by means of the injection method (methane as tracer gas). For empty tube velocities of ca. 0.6–6 m/s we obtain $$Pe_p = u_0 \cdot p/D_r = 8 ( \pm 30\% )$$ wherep: average pore diameter.
    Notes: Zusammenfassung Es werden die radialen StoffdispersionskoeffizientenD r in von Luft durchströmten keramischen Schaumstrukturen der Porenfeinheiten 10, 20, 30 und 50 PPI (pores per inch) mit der Injektionsmethode (Tracergas Methan) bestimmt. Für Leerrohrgeschwindigkeitenu 0 von ca. 0.6–6 m/s erhält man (p: mittlerer Porendurchmesser): $$Pe_p = u_0 \cdot p/D_r = 8 ( \pm 30\% )$$
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01560081
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Monoclonal antibody BW431/26 labelled with technetium 99m and indium 111: an investigation of the biodistribution and the dosimetry in patients (1991)
    Springer
    European journal of nuclear medicine 18 (1991), S. 813-816 
    Details
    ISSN: 1619-7089
    Keywords: Monoclonal antibodies ; BW 431/26 ; Technetium 99m ; Indium 111 ; Biokinetics ; Dosimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract As a competitive diagnostic tool for the detection of malignant tumours and other pathological conditions, monoclonal antibodies have long been established. Herein we give the biokinetic data of the antibody BW 431/26 and the consequent radiation dose to patients. These parameters were recorded in 39 patients, using the antibody labelled either with technetium 99m or indium 111. Remarkable differences were observed between the two radionuclides. Whereas the indium-labelled one showed biexponential elimination kinetics, the technetium-labelled one is eliminated linearly over time. The distribution pattern of the two is identical, although the radiation dose varies quite a lot, being 20-fold higher with indium 111 when total body exposure is taken into account (for 111In the whole-body radiation exposure is 0.1 mGy/MBq; for 99mTc it is 0.0047 mGy/MBq). With respect to these results and considering the general availability of the technetium-labelled Ab, it is the best choice for diagnostic use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00175060
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    Paper (German National Licenses)
    Fulltext
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