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  • 1
    Electronic Resource
    Electronic Resource
    A case of ochronosis: MRI of the lumbar spine (2000)
    Springer
    Neuroradiology 42 (2000), S. 905-907 
    Details
    ISSN: 1432-1920
    Keywords: Key words Alkaptonuria ; Ochronosis ; Spine ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We present the MRI features of the lumbar spine in a patient with ochronosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002340000428
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Elemental analysis of selected Indian monazite ores by energy dispersive X-ray fluorescence /EDXRF/ spectroscopy (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 137 (1989), S. 127-133 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Analysis by Energy Dispersive X-ray Fluorescence spectroscopy of monazite ores from Kerala /Chavara and Manavalakurichi/, Orissa /Chattrapur/ and Tamil Nadu /Tirunelveli/ has been carried out for the determination of their elemental composition using109Cd /annular/ and241Am /disc/ radioisotope sources. The elements Y, Zr, Mo, Pb, Th and U were analyzed using a109Cd source, and the elements La, Ce, Pr, Nd, Sm, Gd and Dy were analyzed using the241Am source in side source geometry. Quntitative results on these 13 elements present in these ores were obtained by the EDXRF technique. It was seen that despite the diverse geological settings, there is remarkable similarity in the elemental composition of these ores, although some trace elements do show certain variations from sample to sample. These results are presented and discussed in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164575
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dielectric properties of SrTiO3 single crystals subjected to high electric fields and later irradiated with X-rays orγ-rays (1989)
    Springer
    Journal of materials science 24 (1989), S. 3469-3474 
    Details
    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 dielectric constant (K), loss (tanδ), and hence conductivity (σ) of SrTiO3 single crystals have been measured in the frequency region 102–107 Hz and in the temperature range 30°–350° C. Quenching, subjecting the crystals to high electric fields (a.c. or d.c.) and X-ray orγ-ray irradiation, or a combination of these treatments, is found to bring about interesting changes in these properties. An attempt is made to understand the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02385726
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on the variation of cell dimensions of mullite with iron oxide and titania additions (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 17 (1988), S. 187-188 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: An analysis has been made of Cameron's data on the variation of the cell dimensions of mullite for compositions with additions of more than 1.0% of Fe + Ti for samples crystallizing out of the melt phase. It was observed that, depending on the amount of either iron oxide or titania added, the cell dimensions change with respect to changes in cell volume, exhibiting shrinkage along either the b or c cell edges. Increasing amounts of titania appear to influence the c cell edge in preference to the a and b edges. The overall cell symmetry, however, is preserved with a simultaneous increase in the a cell edge with change in the cell volume.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300170506
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Optimization of geometry for x-ray analysis of rare earth materials (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 16 (1987), S. 23-26 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method of sample excitation is proposed for obtaining good sensitivity and detection limits for rare earth elements (57 ≤ Z ≤ 69) by energy-dispersive X-ray fluorescence analysis using a 241Am radioisotope source. Detection limits of about 100 - 300 ng for most of the elements using a thin multi-element sample on a Mylar backing are obtained for a counting time of 1 h with a 100 mCi source. The configuration employed is a close-coupled collimated side source geometry in which the sample is mounted at 45° to the plane of the detector. This geometry was found to be superior to the commonly used wide annular geometry in terms of the detection limits obtained for the analysis of rare earth elements. A comparative study of the performance of different source geometries using both Mylar- and cellulose-based samples is described.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300160106
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    Paper (German National Licenses)
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