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G Leibovitch

Publications and source records attributed to G Leibovitch.

5 recordsLinked to original sources
PubMed2003

Andreev reflections on Y(1-x)Ca(x)Ba(2)Cu(3)O(7-delta): evidence for an unusual proximity effect.

We have measured Andreev reflections between an Au tip and Y(1-x)Ca(x)Ba(2)Cu(3)O(7-delta) thin films in the in-plane orientation. The conductance spectra are best fitted with a pair potential having the d(x2-y2)+is symmetry. We find that the amplitude of the is component is enhanced as the contact transparency is increased. This is an indication for an unusual proximity effect that modifies the pair potential in the superconductor near the surface with the normal metal.

Journal Article↗
PubMed1991

[Vocal cord dysfunction mimicking bronchial asthma].

A 19-year-old woman presented with attacks of dyspnea, wheezing and stridor. She had been treated for bronchial asthma with bronchodilators and corticosteroids without improvement. During episodes of wheezing, lung function tests were consistent with variable extrathoracic obstruction. Fiberoptic bronchoscopy confirmed that wheezing was due to paradoxical adduction of the vocal cords during the respiratory cycle. Clinical symptoms improved with speech therapy and psychological aid in relaxation. Vocal cord dysfunction is important in the differential diagnosis of bronchial asthma.

Adult↗
PubMed1991

Multiple brain abscesses caused by Streptococcus bovis.

A case of multiple brain abscesses caused by Streptococcus bovis in a 28-year-old man is described. Infected bronchiectasis is presumed to be the source of infection. Streptococcus bovis infection is a rare cause of brain abscess. The aetiology and manifestations of this infection are discussed.

Adult↗