Author: Christen Skaar Publisher: Springer Science & Business Media ISBN: 3642736831 Category : Technology & Engineering Languages : en Pages : 292
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: Rowell Publisher: ISBN: 9788170890409 Category : Languages : en Pages : 626
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: Joshua Medcalf Publisher: Lulu Publishing Services ISBN: 9781483441788 Category : Conduct of life Languages : en Pages : 0
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: J.F. Siau Publisher: Springer Science & Business Media ISBN: 3642692133 Category : Technology & Engineering Languages : en Pages : 256
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: Gail Reichstein Publisher: Kodansha ISBN: 9781568362090 Category : Medicine, Chinese Languages : en Pages : 246
Book Description
Does your back pain flare up in the evening? Perhaps your water element is weak. Allergies in the spring? Emotional outbursts? Perhaps your wood element is too strong. Using the five element system of Chinese cosmology as a key-wood, fire, earth, metal, water-Gail Reichstein unlocks the ancient mysteries of Chinese medicine and makes them available for the everyday health and well-being of modern readers. Each chapter includes: -Lists of common ailments associated with each element -Feng shui solutions for the home and workplace -Acupuncture treatment -Dietary therapy -Qigong exercises Simple, easy to use, and practical, this introduction connects the physical, emotional, and spiritual forces at work in our lives and provides a vital contribution to the field of mind-body medicine.
Author: Christen Skaar
Author: William Lanpheer James
Author: Rowell
Author: Joshua Medcalf
Author: Wilfred W. Barkas
Author: J.F. Siau
Author: Gail Reichstein
Author: Christen Skaar
Author: R. Bruce Hoadley
Author: H. Tarkow