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Träfflista för sökning "WFRF:(Thompson S. G.) srt2:(1995-1999)"

Sökning: WFRF:(Thompson S. G.) > (1995-1999)

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  • Gale, S. J., et al. (författare)
  • Band termination spectroscopy in 157Er
  • 1995
  • Ingår i: Journal of Physics G: Nuclear and Particle Physics. - 0954-3899. ; 21:2, s. 193-213
  • Tidskriftsartikel (refereegranskat)abstract
    • The level scheme of 157Er has been extended from a spin region where the nucleus behaves as a prolate rotor to a region where the spin is produced by the alignment of all or most of the available valence nucleons along the symmetry axis of a weakly deformed oblate shape. The level scheme was established at high spin using up to four-fold gamma -ray coincidences detected in the Eurogam spectrometer following the reaction 114Cd( 48Ca,5n)157Er at a bombarding energy of 210 MeV. Particularly favoured states have been established at IK=69/2+, 81/2+, 71/2+, 77/2-, 87-/2 and 89-/2. Specific single-particle configurations are assigned to these special states by comparison with cranked Nilsson-Strutinsky calculations. These states are related to structures observed in the neighbouring nuclei 158Er and 157Ho. These data provide the spectrum of single-particle states for the lowest lying valence orbitals above the 146Gd closed core.
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  • Aziz, Q, et al. (författare)
  • Identification of human brain loci processing esophageal sensation using positron emission tomography
  • 1997
  • Ingår i: Gastroenterology. - 0016-5085 .- 1528-0012. ; 113:1, s. 50-59
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND & AIMS:Brain loci that process human esophageal sensation remain unidentified. The aim of this study was to identify the brain loci that process nonpainful and painful human esophageal sensation.METHODS:In 8 healthy subjects (7 men; age range, 24-47 years), distal esophageal stimulation was performed by repeatedly inflating a balloon at volumes that produced either no sensation, definite sensation, or pain. Two positron emission tomography scans were performed for each sensation using H2(15)O. Magnetic resonance brain scans were also performed in each subject, and the positron emission tomography data were coregistered with magnetic resonance scans. Analysis of covariance-corrected t images showing the contrasts definite sensation-baseline, pain-baseline, and pain-definite sensation were created.RESULTS:Nonpainful stimulation elicited bilateral activations along the central sulcus, insular cortex, and frontal/parietal operculum (P < 0.01). Painful stimulation produced more intense activations of the same areas and additional activation of the right anterior insular cortex and the anterior cingulate gyrus. Multiple areas of decreased activation were also observed; prominent among these was the right prefrontal cortex, which was inhibited during both nonpainful and painful stimulation.CONCLUSIONS:Esophageal sensation activates bilaterally the insula, primary somatosensory cortex, and operculum. The right anterior insular cortex and anterior cingulate gyrus process esophageal pain.
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