Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Precipitating factors of transient global amnesia (1999)
    Springer
    Journal of neurology 246 (1999), S. 53-54 
    Details
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004150050306
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    RCBF-quantification with 99mTc-HMPAO-SPECT: Theory and first results (1989)
    Springer
    European journal of nuclear medicine 15 (1989), S. 1-8 
    Details
    ISSN: 1619-7089
    Keywords: Cerebral blood flow ; 99mTc-HMPAO ; 195mAu ; SPECT ; Three compartment model ; Uptake kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The activity concentrations of 99mTc-HMPAO in brain after intravenous injection were evaluated in 25 patients using SPECT. With additional first pass studies of heart and brain with the short lived isotope 195mAu, the cardiac output and the mean cerebral transit times of the patients were measured a short time before the HMPAO injection. The time dependence of 99mTc-HMPAO activity in the brain was registered during the first 5 min after injection over both hemispheres. Using a simplified three compartment model it was possible to calculate the mean retention fraction of HMPAO in brain from the time activity curves. It could be shown that the regional cerebral blood flow in ml/min per 100 g can be calculated from the activity concentration of HMPAO in the brain, the cardiac output and the retention fraction. In 15 of the 25 cases the rCBF was measured using the planar 133Xe inhalation method as a reference. We found a significant correlation between the mean hemisphere CBF from our method and the mean hemisphere grey matter CBF from the Xenon method with a correlation coefficient of 0.73.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253591
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Cu2+ in trigonal-bipyramidaler Koordination: Die Struktur des CuGaInO4 (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 479 (1981), S. 119-124 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cu2+ in Trigonal-bipyramidal Coordination: Structure of CuGaInO4CuGaInO4 crystallizes in space group R3m with the hexagonal unit cell parameters a = 335.4(3) and c = 2481(5) pm (Z = 3). The anions form a 12-layer structure with the sequence (31)3. Indium has a position between cubically packed oxygen layers and possesses a (trigonally-compressed) octahedral coordination. Cu2+ and Ga3+ - with positions near to the oxygen layers of hexagonal sequence - have a trigonal-bipyramidal coordination (distorted: C3v). Polyhedra of the same kind form layers by mutual connections via common edges. Polyhedra of different kind are connected with each other along the 3-axis by common corners.
    Notes: Die Kristallstruktur von CuGaInO4 wurde bestimmt. Die Substanz kristallisiert in der Raumgruppe R3m mit den hexagonalen Gitterkonstanten a = 335,4(3) und c = 2481(5) pm (Z = 3). Die Anionen bilden eine 12 L-Struktur mit der Stapelfolge (31)3. Indium liegt zwischen kubisch gestapelten Sauerstoffschichten und ist (trigonal-gestaucht) oktaedrisch koordiniert. Cu2+ und Ga3+ haben Positionen, die den hexagonal gestapelten Anionenschichten benachbart sind. Sie sind trigonal-bipyramidal (verzerrt: C3v) koordiniert. Gleiche Polyederarten sind miteinander über Kanten zu Schichten verknüpft, verschiedene längs der 3-Achse über Ecken.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814790814
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Die CuAllnO4-Struktur - röntgenographische und spektroskopische Untersuchungen an Verbindungen MIIMeIIIInO4 [MII: Mn2+-Zn2+; MeIII: Al, Ga]Professor Walter Rüdorff zum 70. Geburtstage am 3. Oktober 1979 gewidmet (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 456 (1979), S. 130-146 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure of CuAlInO4 - Structural and Spectroscopic Investigation on Compounds MIIMeIIIInO4 [MII: Mn2+ -Zn2+; MeIII: Al, Ga]A single crystal X-ray analysis of CuAlInO4 yielded a monoclinic structure [space group: Cm; am = 572.8(3) pm, bm = 330.9(2) pm, cm = 835.2(3) pm, β = 103.2(2)°; Z = 2], in which Cu2+ and Al3+ possess a distorted trigonal bipyramidal and In3+ an octahedral coordination. In hexagonal description the sequence of oxygen layers is ababcacabcbc with Cu2+ and Al3+ close to those layers, which have a hexagonal packing symmetry, and In3+ between layers of cubic packing sequence. Compounds MIIMeIIIInO4 (MII: Mg2+, Mn2+, Co2+, Cu2+ Zn2+; MeIII: Al3+, Ga3+) have the same structure. Ligand field and EPR spectroscopic results confirm the trigonal bipyramidal coordination of the transition metal ions. The stabilisation of the CuAlInO4- with respect to the spinel structure is discussed on the basis of site preference energies.
    Notes: CuAlInO4 (röntgenographische Einkristall-Strukturanalyse) kristallisiert monoklin [Raumgruppe: Cm; am = 572,8(3) pm, bm = 330,9(2) pm, cm = 835,2(3) pm, β = 103,2(2)°; Z = 2] mit (verzerrt) trigonal-bipyramidaler Koordination von Cu2+ und Al3+ und oktaedrisch koordinierten In3+-Ionen. In pseudohexagonaler Aufstellung (ah = 331 pm, ch = 2 439 pm) ist die Sauerstoff-Schichtenfolge ababcacabcbc mit Cu2+ und Al3+ in der Nähe der hexagonalen und In3+ zwischen den kubisch gestapelten Schichten.Den gleichen Gittertyp besitzen die Verbindungen MIIMeIIIInO4 (MII:Mg2+, Mn2+, Co2+, Cu2+ Zn2+; MeIII: Al3+, Ga3+). Die trigonal-bipyramidale Koordination der Übergangsmetallionen wird durch ligandenfeld- und EPR-spektroskopische Messungen bestätigt. Die Stabilisierung der CuAlInO4-im Vergleich zur Spinellstruktur durch 3dn-Kationen wird auf der Grundlage von „site-preference“-Energien diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794560114
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...