Firs and pines dominated the global picture of the raw materials for paper industry until the 1950s. At that time, the interest in introducing new species, mostly hardwoods, led the researchers intensify efforts to look for the fibrous characteristics and their combinations that could represent the relationship between fibres, pulp and paper.The pulp and paper industry has shown, mainly in the last two decades, a strong North-South displacement. This is to a large extent due to the favourable climate, which promote the development of the trees. Similarly, the paper fibres have gone from being almost exclusively softwoods from natural forests of the Northern-Hemisphere cold regions, such as spruce and fir, to fast growing species of short fibres, such as eucalyptus, and willow and poplar hybrids from plantations.These new species, that begin to dominate the paper panorama, not only differ from classic ones in fibre length, but they present particular characteristics, like large amounts of juvenile wood, different fibrillar angle and so on, because trees are used increasingly at younger age.This leads us to question whether the old paradigms concerning the relationships between fibres characteristics and pulp properties are still valid or should be reviewed and updated, in which case, the basic fibre parameters, their influence in pulping and refining, and their impact on paper quality should be redefined.To establish the state-of-the-art on the topic, this book analyses the publications of the last decade to verify the morphological characteristics of the fibres which are nowadays considered relevant. Relatively recent data were surveyed because of the continuous changes that occur in the species by genetic improvement.
Polysaccharides in Medicinal and Pharmaceutical Applications presents new and specific aspects in the field of polysaccharides and their derivatives recommended for use in medicine and pharmacy. At the same time the aspects developed in this book will be useful to designing new systems for drugs delivery, immunomodulation, and new materials based on polysaccharides isolated from different sources and their derivatives.
Written in lucid language, this valuable text discusses fundamental concepts of von Neumann algebras including bounded linear operators in Hilbert spaces, finite von Neumann algebras, linear forms on algebra of operators, geometry of projections and classification of von Neumann algebras in an easy to understand manner. The revised text covers new material including the first two examples of factors of type II^1, an example of factor of type III and theorems for von Neumann algebras with a cyclic and separating vector. Pedagogical features including solved problems and exercises are interspersed throughout the book.
En esta segunda novela Valentín Mendoza pone en juego nuevos recursos de sus naturales dotes de narrador de largo aliento. Esta vez el autor nos conduce de la mano a través de una galería de tipos humanos y de eventos cargados de fuerte trascendencia social. Sin embargo, el dibujo de los personajes y de sus circunstancias es tan delicado y sutil que en ningún momento percibe el lector el asomo de la ideología en que se apoya la tesis que justifi ca la construcción del relato. Vale destacar el papel que juegan las mujeres en la confi guración de la historia y muy en particular, la fe en la nobleza del espíritu humano.
This volume is devoted to the synthesis, application, structure, and physicochemical properties of nitroazoles (five-membered aromatic compounds). The book is unique in providing the first comprehensive treatment of nitroazoles.
Hispanic travelers to the United States, English-speaking Canada, and other English-speaking countries will value this quick-reference vocabulary and phrase builder. Hundreds of color photos and cartoon-style illustrations present visual images of words and phrases that travelers typically need when they are getting around in English-speaking countries. Here's how to ask for gasoline when driving into a service station—with pictures and bilingual phrases and answers to dramatize the situation. Here too are words and pictures depicting all kinds of food and drink—a pineapple, a mug of cold beer, a sandwich, a fresh apple. The book is color-coded along page edges according to topics to help travelers find what they're looking for in a hurry. General topics include transportation, accommodations, food shopping, department store shopping, furniture and appliances, sports and recreation, and many others. This good-looking book also makes a handy reference source for language students.
The landmark text that belongs in the hands of every cardiologist―fully updated and reorganized to make it more patient-centric than ever A Doody's Core Title for 2023! World-famous for its authority and clinical relevance, Fuster and Hurst’s The Heart is cardiology’s longest continuously published reference book. Written to meet the ever-changing needs of cardiologists, fellows, and interns, this trusted classic offers a solid foundation in cardiovascular medicine and complete coverage of all major cardiovascular topics. This fifteenth edition presents a greater focus on the practicalities of patient care. Additionally, the content is ordered in a more methodical pattern, from mechanism to management. Reflecting the latest technical, therapeutic, and clinical advances, Fuster and Hurst’s The Heart provides invaluable concise summaries of major new trials and guidelines. Authoritative Coverage and Unmatched Utility: Central Illustrations New section on cardiovascular critical care New chapter "Cardiovascular Disease and COVID-19" Chapter summaries ACC/AHA/ESC guidelines in all chapters 1,200+ photos and illustrations Sections Include: Risk Factors for Cardiovascular Disease Atherosclerosis and Coronary Heart Disease Diseases of the Great Vessels and Peripheral Vessels Valvular Heart Disease Rhythm and Conduction Abnormalities Heart Failure Diseases of the Pericardium Cardiopulmonary Disease Critical Cardiovascular Care Adult Congenital Heart Disease Special Populations and Topics in Cardiovascular Disease
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