Spiral Grain and Wave Phenomena in Wood Formation PDF Download
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Author: John M. Harris
Publisher: Springer Science & Business Media
ISBN: 364273779X
Category : Technology & Engineering
Languages : en
Pages : 226
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Book Description
It is widely recognized that spiral grain in trees severely reduces the value of sawn timber through warping and loss of strength, and that it also causes problems for other wood uses as diverse as transmission poles or plywood. Yet, paradoxically, there are highly valued grain patterns including wavy and interlocked grain, whose origins in the cambium invite direct comparison with those of spiral grain, so that many authorities believe them to be related phenomena. In recent years this concept has prompted extensive research into the anatomy, genetics, and physiology of all such grain patterns in wood. As a result it has become apparent that tree cambia provide excellent systems through which to study the origins of stem polarity and the complex processes of morphogenetic control in plants. Beside these and other pressing topics for research, the book examines methods of measuring grain deviations, and considers their influence on wood properties, on the economics of timber production, and on wood manufacturing.
Author: John M. Harris
Publisher: Springer Science & Business Media
ISBN: 364273779X
Category : Technology & Engineering
Languages : en
Pages : 226
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Book Description
It is widely recognized that spiral grain in trees severely reduces the value of sawn timber through warping and loss of strength, and that it also causes problems for other wood uses as diverse as transmission poles or plywood. Yet, paradoxically, there are highly valued grain patterns including wavy and interlocked grain, whose origins in the cambium invite direct comparison with those of spiral grain, so that many authorities believe them to be related phenomena. In recent years this concept has prompted extensive research into the anatomy, genetics, and physiology of all such grain patterns in wood. As a result it has become apparent that tree cambia provide excellent systems through which to study the origins of stem polarity and the complex processes of morphogenetic control in plants. Beside these and other pressing topics for research, the book examines methods of measuring grain deviations, and considers their influence on wood properties, on the economics of timber production, and on wood manufacturing.
Author: John C.F. Walker
Publisher: Springer Science & Business Media
ISBN: 1402043937
Category : Technology & Engineering
Languages : en
Pages : 603
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Book Description
This book is primarily a general text covering the whole sweep of the forest industries. The over-riding emphasis is on a clear, simple interpretation of the underlying science, demonstrating how such principles apply to processing operations. The book considers the broad question "what is wood?" by looking at the biology, chemistry and physics of wood structure. Wood quality is examined, and explanations are offered on how and why wood quality varies and the implications for processing. Finally, various "industrial processes" are reviewed and interpreted. All chapters have been written by specialists, but the presentation targets a generalist audience.
Author: United States. Munitions Board. Aircraft Committee. Subcommittee on Air Force-Navy-Civil Aircraft Design Criteria
Publisher:
ISBN:
Category :
Languages : en
Pages : 384
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Book Description
Author: Forest Products Laboratory (U.S.)
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 366
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Book Description
Author: Bruce J. Zobel
Publisher: Springer Science & Business Media
ISBN: 3642795145
Category : Technology & Engineering
Languages : en
Pages : 351
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Book Description
Over the past years, a great deal has been learned about variation in wood prop erties. Genetic control is a major source of variation in most wood properties. Wood is controlled genetically both directly in the developmental or internal pro cesses of wood formation and indirectly by the control of tree form and growth patterns. Emphasis in this book will be on the internal control of wood production by genetics although there will be two chapters dealing with the indirect genetic control of wood, which was covered in detail in the previous book by Zobel and van Buijtenen (1989). The literature on the genetics of wood is very variable, SO'lle quite superficial, on which little reliance can be placed, and some from well-designed and correctly executed research. When suitable, near the end of each chapter, there will be a summary with the authors' interpretation of the most important information in the chapter. The literature on the genetics of wood can be quite controversial. This is to be expected, since both the environment and its interaction with the genotype of the tree can have a major effect on wood properties, especially when trees of similar genotypes are grown under widely divergent conditions. Adding to the confusion, studies frequently have been designed and analyzed quite differently, resulting in conflicting assessments of results.
Author: Bir Bahadur
Publisher: CRC Press
ISBN: 0429960700
Category : Nature
Languages : en
Pages : 370
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Book Description
Plants exhibit forms of asymmetry analogous to "handedness" in bilaterally symmetrical animals. This book explores the evolutionary significance and development of asymmetry. Examples of genetic control include the direction of tendril or stem coiling of many climbing plants; the so-called spiral phyllotaxy and floral taxy; and contorted petal arrangement is another kind of left- right symmetry in plants; the direction of contortion is fixed in some but not in other plants. The book will underscore tha all phenomena related to handedness start during embryogenesis itself, with the occurrence of embryo rotation. Key selling features: First consolidated book on Plant Handedness Relates handedness, asymmetry and chirality to the evolution of different organizational levels in plant biology Emphasizes handedness as a vital governing force in plant functional evolution Provides a new perspective, hitherto ignored, into plant developemtn and evolution Describes how an age-old phenomenon can give scope for investigation from a very modern interdisciplinary approach
![Training Manual [2000-]. PDF](https://books.google.com/books/content/images/frontcover/AgNJAQAAIAAJ?fife=w80-h100)
Author: United States. War Department
Publisher:
ISBN:
Category :
Languages : en
Pages : 456
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Author:
Publisher:
ISBN:
Category : Military art and science
Languages : en
Pages : 180
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Author:
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 28
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Author: United States. Navy Department. Bureau of Ships
Publisher:
ISBN:
Category : Shipbuilding
Languages : en
Pages : 458
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Book Description
