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  • 1
    Electronic Resource
    Electronic Resource
    The breakup of24Mg into16O and8Be (1994)
    Springer
    The European physical journal 349 (1994), S. 349-350 
    Details
    ISSN: 1434-601X
    Keywords: 24.30.−v ; 25.70.−z ; 27.30.+t
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The breakup of24Mg into16O and8Be fragments has been studied using the reactions12C(24Mg,16O8Be)12C and12C(20Ne,16O8Be)8Be. In the latter case, discrete states are observed near 24–28 MeV of excitation in24Mg and the yield from this reaction is an order of magnitude greater than that of the former. This implies the excited configuration populated in24Mg is favoured by the transfer of an alpha-particle and would therefore suggest an association with a 4-particle 4-hole configuration. This suggests a link with the octupole stabilised deformed minimum which appears in Nilsson-Strutinsky calculations of the potential energy surface in24Mg, and also with theα —16O —α structure predicted in cranked cluster model calculations. In the excitation spectrum no states appear above 31 MeV indicating a possible band termination in disagreement with recent results using the16O+12C reaction. These results are discussed in terms of the Harvey model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288992
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  • 2
    Electronic Resource
    Electronic Resource
    Adrenergic control of bicarbonate absorption in the proximal convoluted tubule of the rat kidney (1980)
    Springer
    Pflügers Archiv 388 (1980), S. 159-164 
    Details
    ISSN: 1432-2013
    Keywords: Microperfusion ; Rat kidney ; Bicarbonate reabsorption ; Norepinephrine ; Alpha adrenergic blocker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of norepinephrine and phenoxybenzamine on bicarbonate absorption in the rat proximal convoluted tubule were studied by simultaneous microperfusion of tubule and peritubular capillaries. Bicarbonate was determined by using a pH-sensitive membrane electrode system. The rates of bicarbonate absorption $$(J_{HCO_3 } )$$ were examined in the same proximal tubule before and after the addition of norepinephrine or phenoxybenzamine. When the proximal tubule was perfused with Ringer solution and peritubular capillaries were perfused with albumin Ringer solution, $$J_{HCO_3 }$$ was 145±3.3 pEq/min×mm. Addition of 2×10−6 mol/l norepinephrine to the capillary perfusate caused a 21% increase in $$J_{HCO_3 }$$ . Addition of 2×10−6 mol/l phenoxybenzamine to the capillary perfusate caused a 12% decrease in $$J_{HCO_3 }$$ . Addition of both norepinephrine and phenoxybenzamine to the capillary perfusate caused a 19% decrease in $$J_{HCO_3 }$$ . However, there was no significant effect on $$J_{HCO_3 }$$ observed when either norepinephrine or phenoxybenzamine was added to the luminal perfusate. These results suggest that adrenergic nerves participate in the regulation of renal tubular bicarbonate absorption through the direct action of norepinephrine on adrenergic receptors located at the basolateral side of the proximal tubule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584122
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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