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1995 (1)
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1Author    George MaroulisRequires cookie*
 Title    On the Electric Multipole Moments of Carbon Monoxide  
 Abstract    The electric dipole, quadrupole, octopole and hexadecapole moment of carbon monoxide has been obtained from finite-field SCF and Moeller-Plesset perturbation theory calculations. The resulting values for the octopole and hexadecapole moments of CO(X 1 r +) are 3.59 eal and — 9.01 ea.Q, respectively. 
  Reference    Z. Naturforsch. 47a, 480—484 (1992); received October 11 1991 
  Published    1992 
  Keywords    Carbon monoxide, Electric moments, Octopole moment, Hexadecapole moment 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-0480.pdf 
 Identifier    ZNA-1992-47a-0480 
 Volume    47 
2Author    A. Seidel, B. BoddenbergRequires cookie*
 Title     
 Abstract    S tu d y o f th e D is tr ib u tio n o f S o d iu m C a tio n s in th e Z e o lite s N a X , N a Y a n d Z n N a Y U s in g C a r b o n M o n o x id e A d s o rp tio n a n d 23N a N M R T e c h n iq u e s Herrn Professor Dr. Werner Müller-Warmuth zum 65. Geburtstag gewidmet The zeolites NaX, NaY, Zn(55)NaY, and Zn(74)NaY were investigated by means of carbon monoxide adsorption and with static and magic angle spinning (MAS) 23Na NMR spectroscopy. The Na+ distribution between the sodalite (/?)-and supercages of the fully hydrated zeolites NaX and NaY were found to agree with XRD results. In the hydrated zinc-exchanged zeolites the Na + ions almost exclusively populate the /?-cages. The adsorption isotherms of CO in the dehydrated zeolites were analyzed quantitatively to yield the concentrations of Na+ residing in the supercages. The measured static and MAS 23Na NMR spectra were analyzed by comparing their widths and shapes with simulated central transition patterns and yield, inter alia, the concentrations of Na+ associated with the spectrum components. Arguments are put forward that 23Na NMR of dehydrated zeolites is well suited to distinguish Na + cations in highly symmetric environments and mobile Na+ species from others located on general positions, but further resolution is hardly feasible. 
  Reference    Z. Naturforsch. 50a, 199—210 (1995); received October 17 1994 
  Published    1995 
  Keywords    23Na NMR, Adsorption, Carbon monoxide, Zeolites, Zinc-exchange 
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 TEI-XML for    default:Reihe_A/50/ZNA-1995-50a-0199.pdf 
 Identifier    ZNA-1995-50a-0199 
 Volume    50 
3Author    H. Berndt, D. Wölfle, H. Bahl, A. SteinbiichlRequires cookie*
 Title    Evidence for Carbon Monoxide Insensitive Respiration in the Aerobic Nitrogen Fixing Bacteria Azotobacter vinelandii OP and Xanthobacter autotrophicus GZ 29  
 Abstract    In intact cells of the non-gummy Azotobacter vinelandii OP CO-insensitivity of the respiratory activity increased with decreasing dissolved oxygen tension in the bacterial suspension. Upon changing from low to high aeration conditions the CO-sensitive respiration was restored. Mea­ surement of the oxidative activity of small particles of A. vinelandii OP with N A D H , ascorbate-DCPIP and ascorbate-TMPD as substrate in the presence and absence of CO indicated that the CO-insensitive site is probably identical with cytochrome , which preferably is reduced by elec­ trons from ascorbate-DCPIP. Small particles of the gum producing A. vinelandii NCIB 8660 ap­ peared to be more sensitive towards CO with ascorbate DCPIP than the non-gummy A. vinelandii OP. In small particles the CO-insensitive DCPIP oxidase was present irrespective of the dissolved oxygen tension during cell growth. In intact cells, however, CO-insensitivity was only expressed at low dissolved oxygen tension when electrons are directed to cytochrome a ^ o in the branched re­ spiratory chain. Intact cells of Xanthobacter autotrophicus G Z 29 exhibited a similar CO-insensi-tive respiration as A. vinelandii OP. 
  Reference    Z. Naturforsch. 34c, 576—581 (1979); received February 26/April 5 1979 
  Published    1979 
  Keywords    Azotobacter vinelandii, Xanthobacter autotrophicus, Carbon Monoxide, Respiratory Chain 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0576.pdf 
 Identifier    ZNC-1979-34c-0576 
 Volume    34