Libros de Biología, página 9 de 607

Discurso inaugural lido na solemne apertura do curso académico 2021-2022

This long awaited monograph deals with the fascinating group of plants known as geraniums or cranesbills. It is restricted to the plants covered by the scientific name Geranium, but does not include those plants known in English as geranium which botanists have transferred to the genus Pelargonium. The book is the result of 28 years of research by the author. It is lavishly illustrated with maps, line drawings and photographs. There is a gap in the available botanical literatura covering the geraniums. The last monographic treatment by Reinhard Knuth appeared in 1912. In the intervening years, much taxonomic information has been accumulated, rendering this massive and comprehensive work out of date. There have been many new species discoveries and much research has been conducted for revisional works. All these changes have caused much confussion to the outsider, making the need for a comprehensive monograph even more pressing. For each of the 307 species covered in this book, complete synonymy and detailed description is given, as well as its distribution, relationships, variability and taxonomic history are discussed. Each species is provided with a map showing its known distribution based on specimens examined by the author, and is illustrated with line drawings and, if available, with colour photographs based on reliable specimens. Some introductory sections explain in detail the morphological structure of these plants, chromosome numbers, breeding system, phytochemistry, distribution, habitats and relationships. For practical reasons and to facilitate the identification of the species, four identification keys have been prepared that cover respectively North and Central America, South America, the Pacific area and the Old World species. This book will be of value to botanists, but also for specialists hobbyists and to anyone fascinated by these plants.

A fascinating look behind the garden hedge and into the rich world of hedgerows and boundaries across Great Britain

This long-awaited work from one of the world''s most respected scientists presents a series of dramatic discoveries never before made public. Starting from a collection of simple computer experiments---illustrated in the book by striking computer graphics---Wolfram shows how their unexpected results force a whole new way of looking at the operation of our universe. Wolfram uses his approach to tackle a remarkable array of fundamental problems in science: from the origin of the Second Law of thermodynamics, to the development of complexity in biology, the computational limitations of mathematics, the possibility of a truly fundamental theory of physics, and the interplay between free will and determinism. Written with exceptional clarity, and illustrated by more than a thousand original pictures, this seminal book allows scientists and non-scientists alike to participate in what promises to be a major intellectual revolution.

Desde hace milenios, las más diversas y poderosas civilizaciones humanas se han sentido elegidas por las divinidades, depositarias de la verdad y de derechos de abuso y explotación. El gran clasificador Carl Linneo denomino homo sapiens a seres especializ

Desde hace milenios, las más diversas y poderosas civilizaciones humanas se han sentido elegidas por las divinidades, depositarias de la verdad y de derechos de abuso y explotación. El gran clasificador Carl Linneo denomino homo sapiens a seres especializados en el saqueo y la devastacion, colocandolos en la cima de la piramide evolutiva. A la vista de los resultados, tal vez sapiens solo sea la ensoñacion taxonomica de una especie que aun estaria por llegar.Las ciencias, tecnologias, artes, politicas o pensamiento que en sus fundamentos no incorporen sus propias especificidades "devolucionarias", respecto a lo historicamente expoliado, solo contribuiran a la barbarie civilizada, a la prorroga del silencio, al exterminio de los recursos y de la diferencia.La desclasificacion aporta, al ideal devolucionario, modalidades abiertas, plurales y particularmente contradictorias, de pensar y conocer.El autor recoge, en varios centenares de ejercicios desclasificados y cuatro ensayos sinteticos sobre desclasificacion, reflexiones e intuiciones, tan cargadas de dramatismo y autocritica como de humor o ironia, fraguadas en una racionalidad paraconsistente y, por ello, radicalmente sensible.

This book is aimed at students of basic University courses of Genetics and Plant Breeding. However, it may also be useful for any person with an interest in crops breeding. The book has 12 Units that covers the main issues of the plant breeding. In the first part of the book basic concepts of Genetics are presented. Subsequently, there are several units devoted to the importance of diversity for plant breeding, to the identification of the different types of plant populations and to have an understanding of their genetic structure and to a presentation of the most used breeding methods. Finally the book deals with different biotechnological tools used in plant breeding.

A importancia do Proxecto Xenoma Humano non reside tanto no que poida, de feito, revelar sobre a bioloxía como na validación e reforzo que fai do determinismo biolóxico como explicación de todas as diferenzas sociais e individuais.Trad. do ingles e notas: Fernando Vazquez Corredoira e Salvador Mourelo Peres.