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Excerpt from Absorption of Gold by Plants<br/><br/>The presence of gold in plants, as determined by chemical ysis, was reported more than a century ago (malte-brun, 1824, p. Careful quantitative experiments performed by Harrison (1908, p. 209  210) with tree samples from an auriferous region of British Gui ana demonstrated that the concentrations of gold in ash of wood and bark were small, ranging from ppm (parts per million), or 1 grain per ton, in bark to ppm in wood from the interior of the tree. Later investigators reported the gold content of many species of plants from various localities throughout the world. Although the amounts given in some reports seem too large (as pointed out by Cannon and others, the fact that plants can absorb gold from the soil solution is well established. The amounts found in plant ash are usually much smaller than 1 ppm. Gold is not known to be essential for plant metabolism, and hence it may be classed as a ballast element in plants. There is no general agreement among investigators as to the forms of gold that are absorbed by plants  that is, whether the absorbed gold is in colloidal-size particles or in water-soluble compounds. The purpose of the experiments described in this report was to determine if plants can absorb some colloidal gold sols and solutions of gold that may be found in the natural environment of plant roots.
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Absorption of Gold by Plants (Classic Reprint)
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Paperback. Zustand: New. Print on Demand. This book explores the little-known phenomenon of plants absorbing gold from their surroundings. The author, a renowned scientist, conducted groundbreaking experiments demonstrating that certain plants, particularly those containing cyanogenic compounds, can absorb gold from solutions simulating natural conditions. These findings challenge the long-held belief that colloidal gold particles and gold solutions are not taken up by plant roots or stems. The book delves into the significance of this discovery, suggesting that plants play a role in the biogeochemical cycling of gold, contributing to the enrichment of gold in soils where cyanogenic plants thrive. The author's meticulous research and engaging writing style make this book a valuable resource for scientists, nature enthusiasts, and anyone curious about the intricate interactions between plants and the environment. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9780365835318_0
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