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Author: Christen Skaar
Publisher: Springer Science & Business Media
ISBN: 3642736831
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree. The wood then begins to lose most of its moisture by drying, resulting in changes in most of its physical properties. These changes, and their relationship to the environment to which the wood is subsequently ex posed, are the subject of this book. The text consists of six chapters. The first chapter discusses cer tain empirical relationships between wood and water, methods of measuring wood moisture content, factors which affect its equilib rium moisture content, and the effect of moisture content on wood strength. The second chapter treats the thermodynamics of moisture sorption by wood, inc1uding enthalpy, entropy, and free energy changes. The third chapter discusses some of the theories which have been proposed to explain the sorption isotherms for hygroscopic ma terials such as wood. Chapter 4 considers hygroexpansion or the shrinking and swelling of wood associated with moisture change. Chapter 5 is concerned with how moisture moves through the cell wall of wood in response to both moisture and temperature gradients. The sixth and final chapter discusses the theoretical and practical aspects of the electrical resistance and dielectric properties of wood, in c1uding the principles involved in their application in electrical moisture meters.
Author: Christen Skaar
Publisher: Springer Science & Business Media
ISBN: 3642736831
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
Wood is formed in an essentially water-saturated environment in the living tree, and the cell wall remains in this state until the water flow from the roots is interrupted, such as by felling the tree. The wood then begins to lose most of its moisture by drying, resulting in changes in most of its physical properties. These changes, and their relationship to the environment to which the wood is subsequently ex posed, are the subject of this book. The text consists of six chapters. The first chapter discusses cer tain empirical relationships between wood and water, methods of measuring wood moisture content, factors which affect its equilib rium moisture content, and the effect of moisture content on wood strength. The second chapter treats the thermodynamics of moisture sorption by wood, inc1uding enthalpy, entropy, and free energy changes. The third chapter discusses some of the theories which have been proposed to explain the sorption isotherms for hygroscopic ma terials such as wood. Chapter 4 considers hygroexpansion or the shrinking and swelling of wood associated with moisture change. Chapter 5 is concerned with how moisture moves through the cell wall of wood in response to both moisture and temperature gradients. The sixth and final chapter discusses the theoretical and practical aspects of the electrical resistance and dielectric properties of wood, in c1uding the principles involved in their application in electrical moisture meters.
Author: J.F. Siau
Publisher: Springer Science & Business Media
ISBN: 3642692133
Category : Technology & Engineering
Languages : en
Pages : 256
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Book Description
This book has a similar subject content to the author's previous Flow in Wood but with substantial updating due to the abundance of research in the wood science field since 1971. Several different concepts have been introduced, particularly in regard to wood-moisture relation ships. The role of water potential in the equilibria between wood and its humid and moist environments is considered. Two theories are introduced to explain the nonisothermal transport of bound water in the steady and unsteady states. As in the former text, the wood-. structure relationship is emphasized . . The author is especially grateful to Dr. C. Skaar for his careful and critical review of much of the manuscript and for the productive dis cussions of many of the concepts. Dr. T. E. Timell, the series editor, rendered major assistance in the preparation of Chap. 2 and in his editing of the manuscript. The author wishes to thank Dr. W. A. Cote, Mr. A. C. Day, and Mr. J. J. McKeon for providing electron micro graphs, Mr. G. A. Snyder for his photography of much of the art work, Dr. C. H. de Zeeuw for his advice in the field of wood anatomy, and Ms. Mary M. Siau for her careful rendition of the art work. Apprecia tion is extended to Miss Judy A. Barton and Mrs. Stephanie V. Micale for their work in typing and checking the manuscript. Mr. J. A.
Author: Joshua Medcalf
Publisher: Lulu Publishing Services
ISBN: 9781483441788
Category : Conduct of life
Languages : en
Pages : 0
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Book Description
Guided by "Akira-sensei," John comes to realize the greatest adversity on his journey will be the challenge of defeating the man in the mirror. This powerful story of one boy's journey to achieve his life long goal of becoming a samurai warrior, brings the Train to be CLUTCH curriculum to life in a powerful and memorable way. Some things you will learn... -No matter how it feels, you are always building your own house. -How and why you must surrender to the outcome in order to be at your best. -Why you never want to have your identity wrapped up in what you do. -Why your strength lies in faithfulness to the little things. -How to develop a heart posture of gratitude. -How to use the biggest challenges as a training ground for greatness. -Why the process is more important than the goal. -Why comparison is the thief of all joy. -How to develop a growth mindset. -Why talent is more of a curse than a blessing. "So many valuable stories and lessons!" -Nick Ahmed, Arizona Diamondbacks
Author: Rowell
Publisher:
ISBN: 9788170890409
Category :
Languages : en
Pages : 626
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Book Description
This 15-chapter book is divided into four sections that discuss wood's structure and basic chemistry, its properties and reactivity, and its surface and degradation chemistry. The very basis of how wood is formed and the structure it assumes during this growth are given in the first section. Various wood science terms are defined and discussed thoroughly to give a clear and adequate foundation for the rest of the book. Wood water relationship important in almost any wood applications- are also discussed in this section. The subsequent three sections discuss relations and chemistry important for the beginning wood chemist to understand. These topics include wood's cell wall components, strength, interaction with preservatives, and adhesion. Wood polymer materials, wood surface activation, weathering and protection, and pyrolysis and fire retardancy are topics also embraced.
Author: Gail Reichstein
Publisher: Kodansha
ISBN: 9781568362090
Category : Health & Fitness
Languages : en
Pages : 246
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Book Description
A clear and concise introduction to the five basic elements of Chinese cosmology and the ways in which an imbalance in them affects mental and physical health.
Author: Hannah Kirshner
Publisher: Penguin
ISBN: 1984877534
Category : Travel
Languages : en
Pages : 368
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Book Description
"With this book, you feel you can stop time and savor the rituals of life." --Maira Kalman An immersive journey through the culture and cuisine of one Japanese town, its forest, and its watershed--where ducks are hunted by net, saké is brewed from the purest mountain water, and charcoal is fired in stone kilns--by an American writer and food stylist who spent years working alongside artisans One night, Brooklyn-based artist and food writer Hannah Kirshner received a life-changing invitation to apprentice with a "saké evangelist" in a misty Japanese mountain village called Yamanaka. In a rapidly modernizing Japan, the region--a stronghold of the country's old-fashioned ways--was quickly becoming a destination for chefs and artisans looking to learn about the traditions that have long shaped Japanese culture. Kirshner put on a vest and tie and took her place behind the saké bar. Before long, she met a community of craftspeople, farmers, and foragers--master woodturners, hunters, a paper artist, and a man making charcoal in his nearly abandoned village on the outskirts of town. Kirshner found each craftsperson not only exhibited an extraordinary dedication to their work but their distinct expertise contributed to the fabric of the local culture. Inspired by these masters, she devoted herself to learning how they work and live. Taking readers deep into evergreen forests, terraced rice fields, and smoke-filled workshops, Kirshner captures the centuries-old traditions still alive in Yamanaka. Water, Wood, and Wild Things invites readers to see what goes into making a fine bowl, a cup of tea, or a harvest of rice and introduces the masters who dedicate their lives to this work. Part travelogue, part meditation on the meaning of work, and full of her own beautiful drawings and recipes, Kirshner's refreshing book is an ode to a place and its people, as well as a profound examination of what it means to sustain traditions and find purpose in cultivation and craft.
Author: Christen Skaar
Publisher:
ISBN:
Category : Wood
Languages : en
Pages : 218
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Book Description
Author: Christen Skaar
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 304
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Book Description
This volume regards all aspects and effects water or moisture can have on the physical and chemical properties of wood. Various techniques used in the measurement of wood moisture content are described in detail. The evaluation of influences of environmental parameters as temperature, moisture or mechanical stress on the water content of wood as well as theoretical approaches to estimate those influences on the volumetric properties as shrinkage and swelling of wood are comprehensively treated. Special emphasis is laid on the discussion of electrical parameters in relation to structural and cellular conditions of wood due to water absorption.
Author: Callum A. S. Hill
Publisher: John Wiley & Sons
ISBN: 047002173X
Category : Science
Languages : en
Pages : 260
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Book Description
This book is exclusively concerned with wood modification, although many of these processes are generic and can be applied to other lignocellulosic materials. There have been many rapid developments in wood modification over the past decade and, in particular, there has been considerable progress made in the commercialisation of technologies. Topics covered include: The use of timber in the 21st century Modifying the properties of wood Chemical modification of wood: Acetic Anhydride Modification and reaction with other chemicals Thermal modification of wood Surface modification Impregnation modification Commercialisation of wood modification Environmental consideration and future developments This is the first time that a book has covered all wood modification technologies in one text. Although the book covers the main research developments in wood modification, it also puts wood modification into context and additionally deals with aspects of commercialisation and environmental impact. This book is very timely, because wood modification is undergoing huge developments at the present time, driven in part by environmental concerns regarding the use of wood treated with certain preservatives. There has been considerable commercial interest shown in wood modification over the past decade, with products based upon thermal modification, and furfurylation now being actively being marketed. The next few years will see the commercialisation of acetylation and impregnation modification. This is a new industry, but one that has enormous potential. This book will prove useful to all those with an interest in wood modification including researchers, technologists and professionals working in wood science and timber engineering, wood preservation, and well as professionals in the paper and pulp industries, and those with an interest in the development of renewable materials.
Author: Thomas Randall Carson Wilson
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 96
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Book Description
