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Wood is the most accessible and renewable material used by humankind during its history. Today, the consumption of wood exceeds all other known materials. The industry of various products made of wood grows continuously. This book reviews research on hydrothermal treatment and modification of wood in the drying and impregnation process; the decomposition of coarse woody debris as an important component of the carbon cycle and biodivesity of forest ecosystems; and the potential of agroforestry as a carbon sequestration strategy. Also discussed is the importance of fossil woods, types of preservation, and their significance in reconstructing the palaeo-climatology and paleo-environment of a region as well as the limitation in identifying the fossil woods.
Wood-based materials are CO2-neutral, renewable, and considered to be environmentally friendly. The huge variety of wood species and wood-based composites allows a wide scope of creative and esthetic alternatives to materials with higher environmental impacts during production, use and disposal. Quality of wood is influenced by the genetic and environmental factors. One of the emerging uses of wood are building and construction applications. Modern building and construction practices would not be possible without use of wood or wood-based composites. The use of composites enables using wood of lower quality for the production of materials with engineered properties for specific target applications. Even more, the utilization of such reinforcing particles as carbon nanotubes and nanocellulose enables development of a new generation of composites with even better properties. The positive aspect of decomposability of waste wood can turn into the opposite when wood or wood-based materials are exposed to weathering, moisture oscillations, different discolorations, and degrading organisms. Protective measures are therefore unavoidable for many outdoor applications. Resistance of wood against different aging factors is always a combined effect of toxic or inhibiting ingredients on the one hand, and of structural, anatomical, or chemical ways of excluding moisture on the other.
"Guide to the properties and uses of Southern African Wood is a fully illustrated, scientifically accurate guide to the characteristics, properties and uses of wood from 140 Southern African tree species. Species treatments include information on conservation status, uses, mechanical properties, durability, identification features, woodworking properties and comments from wood users on workability. Photographs of tree bark, untreated and treated wood, end-grain macrographs, as well as worked items. Provides information on historical uses, where trees grow, availability and sustainability of the woods and the practicalities of harvesting and processing. Superior quality text and excellent reproduction and printing. The only commercially available book which focuses on the properties of Southern African wood, written in a style that will appeal to a wide audience: professional woodworkers, designers, architects, wood dealers and wood collectors, hobbyists, botanists and anyone interested in trees and wood. A must-have for all who love wood and trees!"--Publisher.
A “smart and surprising” (Booklist) “expansive history” (Publishers Weekly) detailing the role that wood and trees have played in our global ecosystem—including human evolution and the rise and fall of empires—in the bestselling tradition of Yuval Harari’s Sapiens and Mark Kurlansky’s Salt. As the dominant species on Earth, humans have made astonishing progress since our ancestors came down from the trees. But how did the descendants of small primates manage to walk upright, become top predators, and populate the world? How were humans able to develop civilizations and produce a globalized economy? Now, in The Age of Wood, Roland Ennos shows for the first time that the key to our success has been our relationship with wood. “A lively history of biology, mechanics, and culture that stretches back 60 million years” (Nature) The Age of Wood reinterprets human history and shows how our ability to exploit wood’s unique properties has profoundly shaped our bodies and minds, societies, and lives. Ennos takes us on a sweeping journey from Southeast Asia and West Africa where great apes swing among the trees, build nests, and fashion tools; to East Africa where hunter gatherers collected their food; to the structural design of wooden temples in China and Japan; and to Northern England, where archaeologists trace how coal enabled humans to build an industrial world. Addressing the effects of industrialization—including the use of fossil fuels and other energy-intensive materials to replace timber—The Age of Wood not only shows the essential role that trees play in the history and evolution of human existence, but also argues that for the benefit of our planet we must return to more traditional ways of growing, using, and understanding trees. A brilliant blend of recent research and existing scientific knowledge, this is an “excellent, thorough history in an age of our increasingly fraught relationships with natural resources” (Kirkus Reviews, starred review).
Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
For nearly 60 years, Timber: Structure, Properties, Conversion, and Use has been the authoritative text on timber technology. Now in its seventh edition, this book remains a vital resource, providing accurate, comprehensive, and fact-driven information for students and professionals in the field. From basic coverage of timber structure, properties, processing, and utilization, to more in-depth scientific investigations, this book covers all the issues and topics of concern to readers with a wide range of levels of sophistication. Timber technology has not stood still since the last revision; Timber: Structure, Properties, Conversion, and Use has kept the pace, exploring such high-tech topics as computer-aided wood identification and log conversion, radio frequency drying of wood, enhancement of wood with plastics, application of preservatives with high-pressure vacuum systems, and the development and application of flame-retardant solutions. Other timely updates include enlarging the chapter on mechanical performance to cover elastic behavior, toughness, and the use of structural-sized timber for strength tests. The chapter on board materials has also been extensively updated and enlarged to include information on new boards and structural composites that have emerged since the last edition. One of the most important strengths of Timber: Structure, Properties, Conversion, and Use is its versatility as a reference for timber professionals while remaining approachable to students in the field. Evidence of the book?s comprehensiveness and versatility becomes clear as it teaches readers about such wide-ranging topics as: identification and nomenclature of timbers variability in cellular features between species principal chemical constituents in timber structural variability caused by natural defects such as bark pockets, resin streaks, and brittleheart determination of density and moisture content in timber thermal and acoustic properties of wood conversion equipment such as circular saws, band saws, frame saws, and chipper canters health and safety issues in the industry adhesives, metal connectors, and joint design forest and millyard pests application of preservatives and finishes From basic identification and timber nomenclature to methods of sap displacement and tests of electrical conductivity, Timber: Structure, Properties, Conversion, and Use covers it all. And while it is no longer possible for any one individual to write authoritatively on every aspect of timber technology, embracing as it does structure, properties, conversion, utilization, and behavior in service, J. M. Dinwoodie has gathered expert opinions and expanded on original author H. E. Desch?s approach and vision to continue to provide the authoritative text on timber technology.