Libros de Biología, página 10 de 607

Late-1990s developments in the study of thermophiles have had considerable significance on theories of evolution. These micro-organisms are able to thrive at temperatures near or even above 100 degrees Celsius, and scientists have begun to study their biology in an attempt to provide clues about the beginnings of life on our planet. Researchers from diverse background such as biology, genetics, biogeochemistry, oceanography, systematics and evolution come together in this comprehensive volume to address questions such as: Why did life originate? Was the Earth at high temperatures when life began, and if so, how high? What can we conclude about the origins of life from studying thermophilic organisms?

The Handbook of Reference Methods for Plant Analysis is an outstanding resource of plant analysis procedures, outlined in easy-to-follow steps and laboratory-ready for implementation.Plant laboratory preparation methods such as dry ashing and acid and microwave digestion are discussed in detail. Extraction techniques for analysis of readily soluble elements (petiole analysis) and quick test kits for field testing are also presented. This handbook consolidates proven, time tested methods in one convenient source. Plant scientists in production agriculture, forestry, horticulture, environmental sciences, and other related disciplines will find the Handbook a standard laboratory reference.The Handbook was written for the Soil and Plant Analysis Council, Inc., of which the editor is a board member. The council aims to promote uniform soil test and plant analysis methods, use, interpretation, and terminology; and to stimulate research on the calibration and use of soil testing and plant analysis. This reference will help readers reach these important goals in their own research.- State-of-the-art methodology presented in an easy-to-follow format.- Contributed chapters from 24 internationally acclaimed experts in their fields.- Emphasis on quality control of analytical data, promoting reliable results and standardization of plant analysis procedures.- Discussions of instrumentation procedures associated with plant analysis.- Appendices providing the location and selection of appropriate plant material useful for analytical quality control data and reference materials for research.

Natural populations of plants show intricate patterns of variation. European botanists of the eighteenth and nineteenth centuries used this variation to classify different kinds into a hierarchy of family, genus, and species. Although useful, these classifications were based on a belief in the fixity of species and the static patterns of variation. Darwins theory of evolution changed this view; populations and species varied in time and space and were part of a continuing process of evolution. The development of molecular techniques has transformed our understanding of microevolution and the evolutionary history of the flowering plants. This new edition reviews recent progress in its historical context, showing how hypotheses and models developed in the past have been critically tested. The authors consider the remarkable insights that molecular biology has given us into the processes of evolution in populations of cultivated, wild and weedy species, the threats of extinction faced by many endangered species and the wider evolutionary history of the flowering plants as revealed by cladistic methods.

Los últimos años han mostrado avances extraordinarios en la bioquímica, en particular en las áreas de la estructura y la función macromoleculares y en la biología molecular. En este contexto, la cuarta edicion de Fundamentos de Bioquimica incluye cambios significativos y actualizaciones de los contenidos que proporcionan una base bioquimica solida, enraizada en la quimica, a fin de preparar a los estudiantes para los desafios cientificos del futuro.

The Illustrated Dictionary of Mycology contains definitions and etymological derivations of over 3,800 mycology terms. This up-to-date reference book enables users to understand the technical terms used in the field of mycology and effectively communicate with colleagues.This beautifully bound hardcover dictionary is easy to use and will be helpful to plant scientists and students at all levels. It features abundant illustrations or photographs inserted near appropriate terms. Each entry is accompanied by a reference to one or more fungi species related to the particular term. A taxonomic outline of the taxa is provided to help those unfamiliar with the grouping of any particular genus. This substantial volume also includes several broader biological terms encountered in mycological literature.

El objetivo de la obra sigue siendo el mismo que en las ediciones anteriores, exponer las técnicas estadísticas usadas con más frecuencia en la investigación biomédica, describiéndolas de tal modo que sean accesibles para un lector no matematico. Se ha acudido a ejemplos de aplicacion biomedica, especialmente a partir de proyectos de investigacion, de tal forma que el lector pueda comprender la utilidad futura del estudio estadistico para su profesion. La nueva edicion mantiene el orden y la organizacion de los capitulos de las anteriores, pero presenta novedades importantes de contenido.

A completely revised and updated edition of the leading mammalogy textbook featuring color photographs throughout and a new streamlined structure for enhanced use in courses There are more than 6 400 species in the class Mammalia including the blue whale the largest animal that has ever lived and the pygmy shrew which weighs little more than a dime Such diversity among mammals has allowed them to play critical roles in every ecosystem whether marine freshwater alpine tundra forest or desert Reflecting the expertise and perspective of five leading mammalogists the fifth edition of Mammalogy Adaptation Diversity Ecology significantly updates taxonomy adds a new introductory chapter on the science of mammalogy and highlights several recently described species To enhance its appeal to students textual material has been reduced consolidated and streamlined without sacrificing breadth or depth of coverage The fifth edition includes for the first time stunning color photographs throughout chapters rearranged and grouped to best reflect phylogenetic relationships with updated numbers of genera and species for each family updated mammalian structural and functional adaptations as well as ordinal fossil histories recent advances in mammalian phyloge

En cada una de las ediciones de este libro, maravilla la nueva información que los biólogos celulares han conseguido. sólo en unos cuantos años. Pero incluso sorprende más la sofisticación. de los mecanismos que han descubierto. En esta edición se ha añad

¿Qué sucedería si en clase de arte te explicaran cómo pintar una verja? ¿O si jamás te mostraran una pintura o te hablaran de la existencia de Van Gogh o Picasso? Pues así es como nos han enseñado matematicas, el equivalente a ver la pintura de la verja secarse. En este fascinante libro, uno de los matematicos mas brillantes del momento nos revela el lado de las matematicas que jamas hemos visto, barnizadas con toda la belleza y elegancia de una pieza de arte.Frenkel nos muestra una disciplina presente en el corazon de toda la materia, que une culturas, tiempo y espacio. Y lo hace a traves de dos historias, la de las maravillas de las matematicas y la historia personal del autor, que huyo de un sistema educativo discriminatorio para convertirse en uno de los matematicos mas importantes del siglo xxi.Pero el libro no es solo una apasionante historia de superacion personal teñida de divulgacion cientifica, sino que nos introduce en una nueva forma de pensamiento capaz de enriquecer nuestra vida personal y ayudarnos a entender mejor el mundo y el lugar que ocupamos en el. Es una invitacion a descubrir la magia del universo escondido de las matematicas.

The Sharks of North America is a reference work that will serve as the standard work on sharks for the twenty-first century. This book covers the entire body of knowledge about each North American species, and dispels the numerous myths found in the scientific and popular literatures. The text covers all the 140 species known from North America, and includes a few extra-limital species from adjacent areas to complete the accounts of some families and to increase the area where this book can be used to identify sharks. Each species is illustrated with an anatomically correct, coloration-correct drawing, and outlines of the snout shape and teeth. This book will be the primary reference of anyone interested in sharks: from laymen and fishermen to biologists and conservationists.

SHERRIS MICROBIOLOGÍA MEDICA

Desde la publicación de la primera edición hace casi 30 años, más de 1 millón de estudiantes han usado Introducción a la microbiología en colegios y universidades de todo el mundo, lo que lo ha conve

• Reorganiza los invertebrados de acuerdo con los avances más recientes. • Incorpora la filogenia molecular como criterio taxonómico. • Avance cualitativo importante al aplicar las últimas toerías en