Marco teórico: generalidades de alopurinol, Aspectos teóricos de la validación, Datos requeridos para la validación, Características de desempeño analítico, Aspectos teóricos de la prueba de disolución.--Parte experimental.

Half-hourly estimates of solar radiation were obtained from satellite data for the Yaqui Valley in Sonora, Mexico for the period November 1998 to March 1999. Estimates were made on a 50 km grid using the Global Energy and Water-Cycle Experiment…

Geothermal Inflow Performance Relationships (GIPR) may be used to estimate formation permeability, by overlapping the well inflow curve with different theoretical GIPR curves. This method does not require field measurement of the well inflow curve. The complete well inflow curve…

The Suchilquitongo Formation of the northeastern Valley of Oaxaca is a thick sequence of thin-bedded tuffaceous sandstones and siltstones, which locally contain Hemingfordian mammal fauna, and interbedded lacustrine limestones and rhyolitic tuffs (Etla Ignimbrite). Three new K-Ar dates of biotite…

Las asociaciones cooperativas han evolucionado, logrando crear un alto desarrollo económico y social en las zonas donde ejecutan sus actividades. El desarrollo económico alcanzado exige que las asociaciones cooperativas busquen modernizarse, con el objeto de ofrecer nuevos y mejores servicios…

La investigación se llevó a cabo en el municipio y departamento de San Vicente, El Salvador; con las siguientes coordenadas 13°38”42.97 latitud norte y 88°47”31.02 longitud oeste meridiano de Greenwich, con una altura de 418 msnm, con temperaturas entre los…

A comparison of performance of two versions of the Eta/CPTEC model is presented. The new version is an update of an earlier operational one and includes representation of soil and vegetation types. The soil/vegetation model contains two underground layers and…

We derive a P-wave 1D-velocity model for Costa Rica that may serve for routine high-precision earthquake location and as initial reference model for 3D seismic tomography. The velocity inversions are performed using 822 well-locatable events together with 14774 P-wave observations…

Concentration data for major and trace elements were examined in two international geochemical reference materials, basaltBIR-1 from the United States Geological Survey (USGS) and peridotite JP-1 from the Geological Survey of Japan (GSJ). Afteroutlier rejection (based on fourteen different statistical…

The barometric effect for the Mexico City neutron monitor is obtained from cosmic ray intensity data obtained during the years 1990-1997, more than half a solar cycle, by correlation between the neutron intensity and the atmospheric pressure. In order to…