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R Corsini

Publications and source records attributed to R Corsini.

9 recordsLinked to original sources
PubMed2000

Emittance growth during bunch compression in the CTF-II

Measurements of the beam emittance during bunch compression in the CLIC Test Facility (CTF-II) are described. The measurements were made with different beam charges and different energy correlations versus the bunch compressor settings which were varied from no compression through the point of full compression and to overcompression. Significant increases in the beam emittance were observed with the maximum emittance occurring near the point of full (maximal) compression. Finally, evaluation of possible emittance dilution mechanisms indicates that coherent synchrotron radiation was the most likely cause.

Journal Article↗
PubMed1998

REM sleep behaviour disorder differentiates pure autonomic failure from multiple system atrophy with autonomic failure.

Ten patients with primary autonomic failure, followed up in a prospective clinical and laboratory study, were finally diagnosed as pure autonomic failure or multiple system atrophy with autonomic failure. Polysomnographic studies were performed in all patients. Whereas all four patients with multiple system atrophy complained of sleep related episodes suggesting REM sleep behaviour disorder (RBD) confirmed by polysomnography, RBD remained absent in the remaining six patients with pure autonomic failure. The data indicate that RBD is an important clinical feature, often heralding multiple system atrophy, but which is absent throughout the course of pure autonomic failure; its recognition can thus be useful in the prognostic evaluation of early primary autonomic failure syndromes.

Adult↗
PubMed1997

REM sleep behavior disorders in multiple system atrophy.

We report the results of clinical and polysomnographic investigations on 39 consecutive multiple system atrophy (MSA) patients. Twenty-seven patients (69%) reported nocturnal motor paroxysmal episodes related to dreams, suggesting the clinical diagnosis of REM sleep behavior disorder (RBD). In 12 of them (44%), RBD preceded the clinical onset of the disease by more than 1 year. In seven (26%), the RBD onset was concomitant with and in eight (30%) was at least 2 years after the appearance of motor or autonomic symptoms. On polysomnographic recordings, 35 of 39 MSA patients (90%) had RBD. Other polysomnographic findings included nonclinical obstructive sleep apnea in 6 patients, laryngeal stridor in 8 patients, and periodic limb movements during sleep in 10 patients. Our data show that RBD represents the most common clinical sleep manifestation and polysomnographic finding in patients with MSA. RBD can frequently herald the appearance of other MSA symptoms by years. Extended polysomnographic montages are recommended in MSA sleep studies.

Adult↗
PubMed1997

Maturation of phagosomes is accompanied by changes in their fusion properties and size-selective acquisition of solute materials from endosomes.

Maturation of phagosomes is characterized by changes in their polypeptides, phosphorylated proteins and phospholipid composition. Kinetic analyses have shown that a variety of proteins associate and dissociate from latex-containing phagosomes at precise intervals during phagolysosome biogenesis. In an attempt to link these temporal biochemical modifications to functional changes, we have examined the in vivo fusion properties of aging endosomes and phagosomes. Using an in vivo fusion assay at the electron microscope, we measured the rate of exchange of bovine serum albumin-gold (5 and 16 nm particles) between endosomes and latex-bead-containing phagosomes. The results obtained indicate that the maturation of phagosomes is accompanied by changes of their fusion properties. Early phagosomes were shown to fuse preferentially with early endocytic organelles and to gradually acquire the ability to fuse with late endocytic organelles. Furthermore, the transfer of bovine serum albumin-gold from endosomes to phagosomes is size-dependent, a process also modulated by the maturation of these organelles, in agreement with the concept that transient fusion events occur between endosomes and phagosomes. Biochemical analysis showed variations in the levels of rab proteins associated with phagosomes during maturation while other 'fusion' proteins, including synaptobrevin1 and synaptobrevin2, remained constant.

Animals↗