506 research outputs found
The Uptake of ACNU in the Experimental Brain Tumor and the Effect of Induced Hypertension - Part II -
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Neutron Capture Cross Sections for the Weak s Process
Full text linkIn past decades a lot of progress has been made towards understanding the
main s-process component that takes place in thermally pulsing Asymptotic Giant
Branch (AGB) stars. During this process about half of the heavy elements,
mainly between 90<=A<=209 are synthesized. Improvements were made in stellar
modeling as well as in measuring relevant nuclear data for a better description
of the main s process. The weak s process, which contributes to the production
of lighter nuclei in the mass range 56<=A<=90 operates in massive stars
(M>=8Msolar) and is much less understood. A better characterization of the weak
s component would help disentangle the various contributions to element
production in this region. For this purpose, a series of measurements of
neutron-capture cross sections have been performed on medium-mass nuclei at the
3.7-MV Van de Graaff accelerator at FZK using the activation method. Also,
neutron captures on abundant light elements with A<56 play an important role
for s-process nucleosynthesis, since they act as neutron poisons and affect the
stellar neutron balance. New results are presented for the (n,g) cross sections
of 41K and 45Sc, and revisions are reported for a number of cross sections
based on improved spectroscopic information
Cerebral Circulation and Metabolism of Malignant Brain Tumor - Clinical Investigation by Positron Emission Computed Tomography -
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The Dissociation Between Glucose and Amino Acid Metabolism in Brain Tumor - Clinical and Experimental Study -
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The Accumulation of 11C-Methionine and Histological Grade in Cerebral Glioma Studied with PET
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Field-Induced Magnetostructural Transitions in Antiferromagnetic Fe1+yTe1-xSx
Full text linkThe transport and structural properties of Fe1+yTe1-xSx (x=0, 0.05, and 0.10)
crystals were studied in pulsed magnetic fields up to 65 T. The application of
high magnetic fields results in positive magnetoresistance effect with
prominent hystereses in the antiferromagnetic state. Polarizing microscope
images obtained at high magnetic fields showed simultaneous occurrence of
structural transitions. These results indicate that magnetoelastic coupling is
the origin of the bicollinear magnetic order in iron chalcogenides.Comment: 5 pages, 5 figures, accepted for publication in Journal of the
Physical Society of Japa
The Clinical Application of 18F-Fluoro-2\u27-Deoxyuridine to the Brain Tumor Patients
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Biological Malignancy and 18FdUrd Uptake in Glioma Patients - PET Study of Nucleic Acid Metabolism
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