La radiactividad

En 1956 el doctor Paul Kuroda propuso la existencia de reactores de fision nuclear naturales en epocas geologicas pasadas. Sin embargo, como a menudo sucede, sus colegas no le creyeron. En 1972, H. Bouzigues y sus colaboradores realizaron, en la planta de materiales fisionables de Pierrelatte, un analisis que midio una pequena perdida de uranio-235 en los minerales de este elemento. Encontraron que esa perdida se debia a un fenomeno extraordinario ocurrido en Gabon, Africa, cuando ese territorio era parte de la Pangea: el uranio-235 faltante se habia consumido en una serie de reactores...

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

Guia completa de los arboles y arbustos de hoja perenne. Incluye una minuciosa descripcion de su follaje, floracion, frutos y facilidad para crear setos, ademas de datos referentes al tipo de terreno y emplazamiento que requieren. Totalmente ilustrado, con mas de 125 fotografias en color.

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

This volume presents the proceedings of a 1986 Advanced Study Institute entitled "Structure/Reactivity and Thermochemistry of Ions", held at Les Arcs, France, June 30 to July 11, 1986. The format of a NATO Institute is ideally suited to in-depth communications between scien tists of diverse backgrounds. Particularly in the field of ion physics and chemistry, where on-going research involves physicists, physical chemists, and organic chemists - who use a variety of experimental and theoretical techniques - it is found that in the relaxed but stimula ting atmosphere of a NATO ASI, each...