Author: Edward Tyson Reichert

Publisher:

Published: 2015-07-20

Total Pages: 600

ISBN-13: 9781331913047

Excerpt from The Differentiation and Specificity of Starches in Relation, to Genera, Species, Etc, Vol. 2 of 2: Stereochemistry Applied to Protoplasmic Processes and Products, and as a Strictly, Scientific Basis for the Classification of Plants and Animals The routine laboratory studies included in Part II were made, as stated in the Introduction (page 14), by Dr. Elizabeth E. Clark and Miss Martha Bunting. The former carried out all of the observations herein recorded except those of a group comprising Wet a, Lathyrus, Qucrcus, Caslanea, IAlium, Tulipa, Convallaria, Amaryllis, Crinum, Sprekdxa, Hccmanthus, HymenocaUis, Lcttcoiitm, Crocus, Spar-axis, Curcuma, Maranta, and Zamia, together with the temperature reactions. Miss Bunting made all of the studies included in this group as well as the important determinations of the temperatures of getlalinizalion. The methods employed in this research are described in ChaptcrVI (page 295), in which portion of the memoir is also explained the scheme of construction of the Curves of Rmclion-Inlcnsilies, which constitute a very important feature of this part of the report.. Additional charts of a different character, which show comparatively the reaction-intcnsitics of all of the starches studied with each agent, a table of the temperatures of gclatinization of all of the starches, and also statements relating to the comparative values and individual peculiarities and certain other matters pertaining to these methods, will be found in Chapter VII (page 303). According to the literature available at the inception of this investigation it seemed questionable as to what data of value in indicating stereochcmic differences in different starches, different starch-grains, and parts of grains were to be gained by such gross histological investigations as were recorded especially by Fritzsche, Sclileidcn, and Nagcli, and by such refined methods as those pursued by Krucmcr, Denniston, and others. The gross histological properties of starches have been shown to be so readily affected by various incidental conditions that starches from genera of a given family (as now constituted by the data of the systematic botanist) may have very unlike gross histological features, while on the other hand those from genera without the remotest relationship may bo so much alike microscopically as to lead to the belief that they had a common plant-origin. 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.