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J Dekoster

Publications and source records attributed to J Dekoster.

6 recordsLinked to original sources
PubMed2002

Coarsening of antiferromagnetic domains in multilayers: the key role of magnetocrystalline anisotropy.

The domain structure of an antiferromagnetic superlattice is studied. Synchrotron Mössbauer and polarized neutron reflectometric maps show micrometer-size primary domain formation as the external field decreases from saturation to remanence. A secondary domain state consisting mainly of at least 1 order of magnitude larger domains is created when a small field along the layer magnetizations induces a bulk-spin-flop transition. The domain-size distribution is reproducibly dependent on the magnetic prehistory. The condition for domain coarsening is shown to be the equilibrium of the external field energy with the anisotropy energy.

Journal Article↗
PubMed1989

[Chronic hypoxia and tissue adaptation (excluding the right heart) in chronic obstructive bronchopathies].

In this report, the authors review the diverse mechanisms of compensation to chronic hypoxaemia, that is principally a displacement to the right of the haemoglobin dissociation curve and polycythaemia which tends to improve the supply of oxygen to the cells. The tissue effects of this chronic hypoxaemia are specified (excluding the right heart). As regards the left ventricle, ventricular function seems to be conserved until late yet there is a risk of arrhythmias which appears to increase proportionately to the degree of desaturation. Chronic respiratory failure produces clear cut neuropsychological deficits which correlate with the degree of hypoxaemia as well as problems with the quality of life and interference with memory. These troubles seem to be limited or even partially reversed by oxygen therapy. These patients also have troubles with urine output of water and sodium and there are also sexual problems as well as peripheral neuropathy.

Brain↗