Search for dissertations about: "hollow earth"

Showing result 1 - 5 of 7 swedish dissertations containing the words hollow earth.

2. 1. Palaeobiology and Chemostratigraphy of the Precambrian - Cambrian Transitional Beds on the Siberian Platform

   Author : Artem Kouchinsky; N.J. Butterfield; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

   Abstract : Biological innovations during the Precambrian-Cambrian transition opened evolutionary gates towards the modem biosphere. Two interrelated aspects of this process are investigated. The first one is the ecological radiation and beginning of calcareous biomineralization in mollusc-like organisms (shelled molluscs, coeloscleritophorans, and hyoliths). READ MORE

4. 2. Recovery of Rare Earth Elements from an Apatite Concentrate

   Author : Mahmood Alemrajabi; Kerstin Forsberg; Åke C. Rasmuson; Koen Binnemans; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rare earth elements; precipitation; nitrophosphate process; hollow fiber supported liquid membrane extraction; Chemical Engineering; Kemiteknik;

   Abstract : Rare earth elements (REE) are a group of 17 elements including lanthanides, yttrium and scandium; which are found in a variety of classes of minerals worldwide. The criticality of the application, lack of high grade and economically feasible REE resources and a monopolistic supply situation has raised significant attention in recovery of these metals from low grade ores and waste materials. READ MORE

5. 3. “One of the Most Intensely Exciting Secrets” : The Antarctic in American Literature, 1820-1849

   Author : Johan Wijkmark; Åke Bergvall; Mark Troy; Orm Øverland; Karlstads universitet; []
   Keywords : HUMANIORA; HUMANITIES; Adam Seaborn; Symzonia; James Fenimore Cooper; Monikins; Sea Lions; Edgar Allan Poe; “MS. Found in a Bottle; ” Narrative of Arthur Gordon Pym; Peter Prospero; “The Atlantis; ” Antarctic literature; 19th-century American literature; utopia; Symmes; hollow earth; evolution; great chain of being; race; Literature; Litteraturvetenskap; English; Engelska;

   Abstract : This study examines a small body of 19th-century American literature about the Antarctic: Adam Seaborn's (pseud.) Symzonia (1820), Edgar Allan Poe's "MS. Found in a Bottle" (1833) and The Narrative of Arthur Gordon Pym (1838), Peter Prospero's (pseud. READ MORE

6. 4. Functional Morphology of Gastropods and Bivalves

   Author : Jenny Sälgeback; Lars Holmer; John S. Peel; Jan-Ove Ebbestad; Enrico Savazzi; Anders Warén; Uppsala universitet; []
   Keywords : Earth sciences; Gastropoda; Bivalvia; functional morphology; constructional morphology; Geovetenskap;

   Abstract : Functional morphology analyzes the relationships between form and function in organisms. However, a comprehensive analysis of any organic structure requires an integrated approach to morphology. For this purpose constructional morphology was developed, where function, phylogeny and construction together explain form. READ MORE

7. 5. Cellular Aspects of Lignin Biosynthesis in Xylem Vessels of Zinnia and Arabidopsis

   Author : Henrik Serk; Edouard Pesquet; Simon Hawkins; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lignin; tracheary elements; xylem wood; post-mortem lignification; non-cell autonomous process; xylem parenchyma; endoreplication; reactive oxygen species; laccases; peroxidases; molecular cell biology; molekylär cellbiologi;

   Abstract : Lignin is the second most abundant biopolymer on earth and is found in the wood (xylem) of vascular land plants. To transport the hydro-mineral sap, xylem forms specialized conduit cells, called tracheary elements (TEs), which are hollow dead cylinders reinforced with lateral secondary cell walls (SCW). READ MORE