Descripción completa.

Descripción completa.

A novel method is introduced to compute symbolic expressions in analog circuits modeled by nullors. The proposed method is based on the formulation of a compact system of equations (CSEs) by manipulation of data-structures, which highly improves traditional symbolic-methods. It…

We present the case of a giant aneurysm and dissection of the abdominal aorta in an eight month old infant. Imaging studies especially a helicoid computerized axial tomography with 3D reconstruction, showed a lesion which extended from the diaphragm to…

A case of an 11-months-old girl with vomiting and laryngeal stridor is presented, and in whom a Kommerell diverticulum was demonstrated, which is a rare variant of the incomplete vascular ring. It is well known that the magnetic resonance is…

Introduction. Injuries caused by fishing gear are common, but uncommon in the eye.When hooks are involved, removal must be careful and a complete revision of the rest of eye structures must be performed. Case report. A 13 years old male…

Acanthocereus chiapensis Bravo was described from plants collected in Chiapas, Mexico in March 1967. Field observations as well as detailed morphological and anatomical studies revealed that this entity rather belongs to genus Peniocereus. This taxonomic opinion was supported by the…

Objective. To evaluate the incidence of adverse cutaneous drug reactions in intensive care unit patients. Design. Cohort study. Setting. General adult intensive care unit of an institutional tertiary care hospital. Patients. Patients in the intensive care unit during a consecutive…

OBJECTIVE: To determine the prevalence of Hepatitis A within subpopulations of southern California counties. MATERIAL AND METHODS: Age and race/ethnic-specific hepatitis A rates were derived from the California Department of Health Services Surveillance and Statistics Section for 1996-2001 and from…

The Great Basin of the Valley of Mexico was composed of several lagoons that have disappeared due to their geologic evolution and anthropogenic activities. The Tecocomulco lagoon, Hidalgo, is a relict of that basin and has undergone extreme changes in…