Un número perfecto

The first major regional flora ever written in Spanish, Flora Mesoamericana is a collaborative effort of the Missouri Botanical Garden, the Instituto de Biologia of the National Autonomous University of Mexico, the Natural History Museum, London, and numerous specialists worldwide. The Flora describes, for the first time, all the vascular plants growing in the southeasternmost states of Mexico, including the Yucatan Peninsula, and all the Central American republics. Covered in this volume are families Rubiaceae to Verbenaceae: 11 families, 202 genera and 1,417 species.

Muchas personas, cada día más, se interesan por los temas concernientes al firmamento, a ese cielo estrellado que podemos ver en una noche oscura y a los fenómenos que en él ocurren. El mundo de la Astronomía es tan amplio, abarca tantos aspectos interrelacionados, que parece conveniente tener a mano un compendio de los conocimientos existentes al respecto, aunque de forma precisa pero sucinta, de fácil lectura y asequible a aquéllos que quieran iniciarse en este fascinante Universo que nos rodea. Más de 100 imágenes a color complementarias al texto, ayudarán sin duda, al lector, a...

Biographies and bibliographies of members are included in many of the volumes. Lists of members are usually given on covers of the numbers.

A study covering the gas-phase chemistry of organometallic ions. Topics covered include: periodic trends in gas-phase thermochemistry of transition metal-ligand systems; ab initio calculations to determine electronic structure, geometric structure, and thermochemistry of metal-containing systems; electronic state effects on metal ion reactivity; organometallic ion photochemistry; and applications of gas-phase electron transfer equilibria in organometallic redox thermochemistry. Also included are state-of-the-art mass spectrometric instrumentation used in such studies. It also features a...