Chemical Investigations of the Tobacco Plant - 7 - Chemical Changes in Light and in Darkness PDF Download
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Author: Connecticut Agricultural Experiment Station
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Languages : en
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Author: Connecticut Agricultural Experiment Station
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Languages : en
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Author: Hubert Bradford Vickery
Publisher: Forgotten Books
ISBN: 9780428550585
Category : Science
Languages : en
Pages : 28
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Excerpt from Chemical Investigations of the Tobacco Plant, Vol. 7: Chemical Changes That Occur in Stalks During Culture Light and in Darkness The samples in light lost about 5 percent of their water promptly (table remained at this level for many hours and finally slowly lost an additional 5 percent. The samples in darkness gradually gained a small amount of water, retained this excess for nearly 100 hours, but ultimately slowly lost about 9 percent. The changes were sluggish and were not ex tensive, comments that apply equally Well to many Of the detailed chemical conversions that were Observed in this tissue. The data for organic solids, although slightly irregular, doubtless due to minor sampling errors, indicate a scarcely significant alteration in the light over the entire periodl, but there was a significant loss in the dark. This Observation is in marked con trast to the behavior of leaves which, under Similar circumstances, Show a prompt and extensive increase in organic solids in light, and a profound loss in the dark. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Category : Plants
Languages : en
Pages : 131
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Author: Hubert Bradford Vickery
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Category : Plants
Languages : en
Pages : 832
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Author: Aaron Raymond Kienholz
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Category : Agricultural experiment stations
Languages : en
Pages : 694
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Author: Hubert Bradford Vickery
Publisher: Forgotten Books
ISBN: 9780428832155
Category : Science
Languages : en
Pages : 84
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Excerpt from Chemical Investigations of the Tobacco Plant, Vol. 6: Chemical Changes That Occur in Leaves During Culture in Light and Darkness The significance Of asparagine in plant physiology was scarcely discussed at this time. In 1844, however, a chance Observation by Menici, a pharmacist Of Pisa, led to a study of asparagine which at one stroke made many of the chemical and physiological relationships Of this substance clear. Menici had had occasion to sprout vetch seeds in the dark and, from an extract Of the etiolated seedlings, had prepared a small quantity Of a crystalline compound that he took to Piria at the University Of Pisa with a request for identification. Piria (48) suspected its nature at once and repeated Menici's experiment on a large scale. He showed that asparagine could be Obtained in equally large quantities from vetch seedlings whether these were sprouted in light or in the dark; that none of the substance was present in the unsprouted seeds; and that it disappeared from the tissues of the plants as these approached flowering, none at all being found as the fruit rip ened. Accordingly, he inferred that light has no influence on the for mation of the substance, that it is produced from the protein of the seed, and is utilized by the plant in the later stages of growth. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: C. H. Batchelder
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Category : Agricultural experiment stations
Languages : en
Pages : 1066
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Author: C. H. Batchelder
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Category : Agricultural experiment stations
Languages : en
Pages : 874
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Author: Connecticut Agricultural Experiment Station
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Languages : en
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Author: Hubert Bradford Vickery
Publisher: Forgotten Books
ISBN: 9780331314076
Category : Science
Languages : en
Pages : 70
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Excerpt from Chemical Investigations of the Tobacco Plant, Vol. 5: Chemical Changes That Occur During Growth Note: The chemical investigations of tobacco herein described were carried out as part of a general project under the title Cell Chemistry, by the Department of Biochemistry of the Connecticut Agricultural Experiment Station, New Haven, Conn. The Department has enjoyed the benefit of close cooperation from the Tobacco Substation. The expenses were shared by the Connecticut Agricultural Experiment Station and the Carnegie Institution of Washington. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
