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Spiral Grain and Wave Phenomena in Wood Formation

2012-12-06 Technology & Engineering
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Release : 2012-12-06
Genre : Technology & Engineering
Kind : eBook
Book Rating : 79X/5 ( reviews)

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Book Synopsis Spiral Grain and Wave Phenomena in Wood Formation by : John M. Harris

Download or read book Spiral Grain and Wave Phenomena in Wood Formation written by John M. Harris. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Asymmetry in Plants

2019-03-25 Nature
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Release : 2019-03-25
Genre : Nature
Kind : eBook
Book Rating : 700/5 ( reviews)

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Book Synopsis Asymmetry in Plants by : Bir Bahadur

Download or read book Asymmetry in Plants written by Bir Bahadur. This book was released on 2019-03-25. Available in PDF, EPUB and Kindle. Book excerpt: 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

Wood Variation

2012-12-06 Technology & Engineering
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Release : 2012-12-06
Genre : Technology & Engineering
Kind : eBook
Book Rating : 693/5 ( reviews)

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Book Synopsis Wood Variation by : Bruce J. Zobel

Download or read book Wood Variation written by Bruce J. Zobel. This book was released on 2012-12-06. Available in PDF, EPUB and Kindle. Book excerpt: Wood is the usual end product of a forestry operation. Because of its importance, numerous studies have been made relative to wood prop erties, the causes of wood variation, and how best to develop wood for desired products. There is voluminous literature related to these subjects, but it is neither well known nor appreciated by foresters because the publications are often not available or are not well understood by the forester or by those who use the wood. Frequently, the literature is confusing and contradictory, making it difficult for the nonspecialist to use what information is available. In order to produce and use wood efficiently, the variation pat terns within trees, among trees within species, and among species must be understood. This also requires some knowledge of the causes of variation and the effects of different wood properties upon utiliza tion. The information about variation patterns, their causes, and con trol and effect upon the product must be known by the tree grower, the tree breeder, and the tree harvester as well as by those who ultimately convert wood into a final, salable product.

General Technical Report SRS

1999 Forests and forestry
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Release : 1999
Genre : Forests and forestry
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis General Technical Report SRS by :

Download or read book General Technical Report SRS written by . This book was released on 1999. Available in PDF, EPUB and Kindle. Book excerpt:

Computer Analysis of Images and Patterns

2007-08-18 Computers
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Release : 2007-08-18
Genre : Computers
Kind : eBook
Book Rating : 727/5 ( reviews)

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Book Synopsis Computer Analysis of Images and Patterns by : Walter Kropatsch

Download or read book Computer Analysis of Images and Patterns written by Walter Kropatsch. This book was released on 2007-08-18. Available in PDF, EPUB and Kindle. Book excerpt: The refereed proceedings of the 12th International Conference on Computer Analysis of Images and Patterns are presented in this volume. The papers cover motion detection and tracking, medical imaging, biometrics, color, curves and surfaces beyond two dimensions, reading characters, words and lines, image segmentation, shape, image registration and matching, signal decomposition and invariants, and features and classification.

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