Seismic constraints on rotation of Sun-like star and mass of exoplanet.

Rotation is thought to drive cyclic magnetic activity in the Sun and Sun-like stars. Stellar dynamos, however, are poorly understood owing to the scarcity of observations of rotation and magnetic fields in stars. Here, inferences are drawn on the internal rotation of a distant Sun-like star by studying its global modes of oscillation.

Ensemble asteroseismology of solar-type stars with the NASA Kepler mission.

In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of oscillations in 500 solar-type stars in the Kepler field of view, an ensemble that is large enough to allow statistical studies of intrinsic stellar properties (such as mass, radius, and age) and to test theories of stellar evolution. We find that the distribution of observed masses of these stars shows intriguing differences to predictions from models of synthetic stellar populations in the Galaxy.

CoRoT reveals a magnetic activity cycle in a Sun-like star.

The 11-year activity cycle of the Sun is a consequence of a dynamo process occurring beneath its surface. We analyzed photometric data obtained by the CoRoT space mission, showing solarlike oscillations in the star HD49933, for signatures of stellar magnetic activity. Asteroseismic measurements of global changes in the oscillation frequencies and mode amplitudes reveal a modulation of at least 120 days, with the minimum frequency shift corresponding to maximum amplitude as in the Sun.

[Persistence of a functional hyaloid artery in an adult. Apropos of a case].

We report a case of a persistent hyaloid artery in a 69 year old man. The exam of the right eye and the anterior segment of the left eye disclosed a mild cataract. Fundus examination of the left eye revealed a persistent hyaloid artery emerging from the optic disc, surrounded by primary vitreous on its anterior end, inserting on the nasal pre equatorial retina.

High-performance liquid chromatographic determination of granisetron in human plasma.

This paper describes a high-performance liquid chromatographic method (HPLC) with fluorometric detection for the analysis of granisetron in plasma. The detection is performed at 305 nm for excitation and 365 nm for emission. The method involves sample clean-up by liquid-liquid extraction.

[Value of serodiagnosis of Lyme disease in the evaluation of uveitis].

Purpose: This study was designed to assess results of Lyme serology among all the specific tests routinely performed for exploring uveitis.

Methods: Sixty-seven patients examined for uveitis had a serological diagnosis of Lyme's disease with haemagglutination test and ELISA IgG test. This group included 34 patients with unclassified uveitis.

[Infectious crystalline keratopathy occurring after penetrating keratoplasty].

Infectious crystalline keratopathy is a chronic corneal infection, characterized by interlamellar opacities that are shaped like crystal formations. In the majority of cases, Streptococcus viridans is cultured. We report the case of a 74 year old man, presenting with corneal infection in a donor graft after penetrating keratoplasty.

[Keratoconus and familial topographic corneal anomalies].

Purpose: Computer-assisted corneal topography, allows the detection of early abnormalities, including abortive or subclinical forms of keratoconus. So, it is possible to identify affected individuals with variable degrees, in family members of patients with keratoconus, to draw pedigrees, and to specify the mode of inheritance.

Methods: Computer-assisted digital videophotokeratoscope was used to map the corneas of 106 family members of 30 patients with keratoconus.