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The Vegetation And Flora Of Chilhowee Mountain, Roy Dale Thomas
The Vegetation And Flora Of Chilhowee Mountain, Roy Dale Thomas
Doctoral Dissertations
Introduction: An investigation of the plants of Chilhowee Mountain was undertaken to increase our knowledge of the flora and vegetation of the mountains adjoining the Smokies and the Ridge and Valley Province and is based on field work done principally by the author from 1962 to 1966.
The aims of this research have been the following: (1) to determine the nature of the flora and to make a checklist of vascular plants of the area; (2) to compare the flora of Chilhowee Mountain with the flora of the Cumberlands and of the Smokies; (3) to describe in detail the canopy, …
Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel
Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel
Loma Linda University Electronic Theses, Dissertations & Projects
A poisonous steroid-type compound was isolated from Centaurea repens. After extraction with absolute ethanol, removal of the solvent, addition of 2% HCl to precipitate the pigments, and filtering, the pH was adjusted to 9 with aqueous anunonia. This solution was exhaustively extracted with chloroform, evaporated to dryness, and extracted with ethyl ether.
This fraction was chromatographed on silica-gel plates, using 10:1 1,2-dichloroethane-methanol as the developer. The band at Rf 4.2 was removed and found toxic to mice. Labored, slow, gasping respiration and frequent involuntary muscular contractions became apparent within a few minutes following the intraperitoneal injection into each animal. Death …
Some Relationships Of Vegetation To Soil And Site Factors On Wilson Mountain, Morgan County, Tennessee, William Haywood Martin Iii
Some Relationships Of Vegetation To Soil And Site Factors On Wilson Mountain, Morgan County, Tennessee, William Haywood Martin Iii
Masters Theses
INTRODUCTION
In this study, the forest composition of Wilson Mountain, Morgan County, Tennessee, is described and distribution of tree taxa and site factors are related.
The study arose from the need for geographic knowledge of an area where resource understanding is of great national concern, and to provide data for characterization of local forest and soil resources as an aid in their management. Of further interest is characterization of the genetic and ecological amplitude of forest tree taxa in this area close to the center of Deciduous Forest diversity.
The objectives in this study of the vegetation of Wilson Mountain …