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  • 1
    Electronic Resource
    Electronic Resource
    Further Aspects of the Chemistry of the Dirhenium Complexes [(triphos)Re(μ-X)3Re(triphos)]n+ (n=1 or 0), Where triphos=CH3C(CH2PPh2)3 and X=Cl or Br (2000)
    Springer
    Journal of cluster science 11 (2000), S. 243-251 
    Details
    ISSN: 1572-8862
    Keywords: rhenium ; dirhenium complexes ; rhenium–rhenium multiple bonds ; tripodal phosphine ligands ; crystal structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The dirhenium(II) complexes [Re2(μ-X)3(triphos)2]O3SCF3 (X=Cl or Br) have been prepared by anion exchange reactions. These salts show well defined simple electron-transfer redox chemistry (two reversible one-electron oxidations and two one-electron reductions) but the [Re(μ-X)3Re] unit is remarkably stable to reactions with donor molecules such as monodentate tertiary phosphines which can often induce cleavage of M-X-M bridges. The crystallographic characterization of these two salts show that Re–Re bonds are not present, the Re...Re distances being 3.274(1) Å for X=Cl and 3.277(1) Å for X=Br.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009081218955
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  • 2
    Electronic Resource
    Electronic Resource
    Reactions of the Dirhenium(II) Complexes Re2X4(μ-dppm)2 (X=Cl, Br; dppm=Ph2PCH2PPh2) with Isocyanides. XXII. A Comparison of Mixed Carbonyl–Isocyanide Complexes with Those Formed by Re2Cl4(μ-dcpm)2 (dcpm=Cy2PCH2PCy2) (2000)
    Springer
    Journal of cluster science 11 (2000), S. 511-518 
    Details
    ISSN: 1572-8862
    Keywords: rhenium ; dirhenium complexes ; rhenium–rhenium multiple bonds ; isocyanide ligands ; carbonyl ligand ; structural isomers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The reactions of the electron-rich triply bonded dirhenium(II) complex Re2Cl4(μ-dcpm)2 (dcpm=Cy2PCH2PCy2) with the isocyanide ligands XylNC (Xyl=2,6-dimethylphenyl) and t-BuNC afford the complexes Re2Cl4(μ-dcpm)2(CNXyl) and Re2Cl4(μ-dcpm)2(CN-t-Bu)2 which in turn react with CO to give salts of the [Re2Cl3(μ-dcpm)2(CO)2(CNXyl)]+ and [Re2Cl3(μ-dcpm)2(CN-t-Bu)2(CO)]+ cations which exist in different isomeric forms. This chemistry is compared with that developed previously for the analogous complexes derived from Re2Cl4(μ-dppm)2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009096713749
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  • 3
    Electronic Resource
    Electronic Resource
    Glucose Transporters and Glucose Utilization in Rat Brain after Acute Ethanol Administration (2000)
    Springer
    Metabolic brain disease 15 (2000), S. 211-222 
    Details
    ISSN: 1573-7365
    Keywords: Ethanol ; GLUT1 ; GLUT3 ; Glucose ; Cerebral Metabolism ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In the normal adult brain, glucose provides 90% of the energy requirements as well as substrate for nucleic acid and lipid synthesis. In the present study, effects of ethanol on glucose transporters (GLUT) and glucose utilization were examined in rat brain. Male Sprague-Dawley rats weighing 250-300 gms were given either ethanol 3 gm/kg BW or saline IP 4 hrs prior to the animal sacrifice and removal of the cerebral cortical tissue. The cortical plasma membranes analyzed by cytochalasin B binding assay showed a decrease in GLUT number but not in GLUT affinity in the ethanol treated rats as compared to the control rats. The estimated Ro values were 70 ± 8.9 Vs 91 ± 8.9 pmoles/mg protein (p 〈 0.05 N=4) and the estimated Kd values were 0.37 ± 0.03 and 0.28 ± 0.05 μM (p: NS) in ethanol and control experiments respectively. Immunoblots of purified cerebral plasma membranes and low density microsomal fraction showed 17% and 71% decrease for GLUT1 and 54% and 21% (p〈0.05 or less; n=6) for GLUT3 respectively in ethanol treated rats than in control animals. Immunofluoresence studies also showed reduction of GLUT1 immunoreactively in choroid plexus and cortical microvessels of ethanol treated rats as compared to control rats. The effect of ethanol on regional cerebral metabolic rates for glucose (CMRGle) was studied using [6-14C] glucose and showed statistically insignificant decrease in brain glucose utilization. These data suggest that ethanol invivo decrease GLUT number and protein content in rat cerebral cortex
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1011115809810
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    Paper (German National Licenses)
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