Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 63 for “"periodic table"”.
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Scientific Realism and the Periodic Table of Chemical Elements
The periodic table poses a difficulty for both scientific realists and anti-realists. The anti-realist has difficulty accounting for the success of the table during a period in chemistry when many theories and concepts changed; the spatial relations of current tables in use do not show fundamental …
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A Prelude to a Third Dimension of the Periodic Table: Superatoms of Aluminum Iodide Clusters
… bi-pyramid A17 superatom structures of the stable aluminum cores have an analogous electronic configuration to that of halogen, alkaline-earth, and alkaline atoms, respectively. Novel chemistry is demonstrated in superatoms, arising from two primary sources. Firstly, the calculations …
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A Periodic Table of Movements: Two Reference Frameworks for Quantifiable Emotion, A Practice Based Investigation of Human Expressive Movement and Gesture
… of two reference frameworks: a correlation table defined as the Periodic Table of Movements (PTM) and a PTM database. The PTM database is a synthesis of embodied emotion data derived from multiple visual representations such as colour, shape, space, volume, time and intensity, whereas the …
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Bond length and bonded radii variations in nitride molecules and crystals
… and 6-coordinate X-cations from rows 1-4 of the periodic table yield minimum energy bond lengths, Rt(XN), which reproduce observed bond lengths, Ro(XN), in crystalline nitrides to within o.O₃A, on average. A linear regression analysis of In[Rt(XN)] vs. In(p) with p = air, where a is the Pauling …
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Surface Reflectance Core Spectroscopy of Halogens, Rare Gases, Alkalis and Carbon-Monoxide on Metal Surfaces
… adsorbates in three neighboring columns of the Periodic Table principally reveal charge transfer processes and properties of the impurity surface complex.
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Bond length and bonded radii variations in sulfide molecules and crystals containing main group elements
… and r is the row number of the X-cation in the periodic table, with 98% of the variation of R<sub>t</sub>(XS) being explained in terms of a linear dependence on R. In addition, R serves to rank observed XS bond lengths in sulfide crystals for main group X-cations for rows 1 through 5 of the …
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ΣΥΝΘΕΣΗ, ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΚΑΙ ΚΡΥΣΤΑΛΛΟΓΡΑΦΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΔΟΜΗΣ ΚΑΙ ΘΕΩΡΗΤΙΚΑ ΜΟΝΤΕΛΑ ΣΥΜΠΛΟΚΩΝ ΤΩΝ ΣΟΥΛΦΟΝΥΛΟΥΡΙΩΝ ΜΕ D8,D9 ΚΑΙ D10 ΜΕΤΑΛΛΟΙΟ...
… WITH METAL IONS OF IB AND IIB GROUPS OF THE PERIODIC TABLE OF THE ELEMENTS. THE NEW COMPLEXES WERE STUDIED AND CHARACTERIZED BY ELEMENTAL ANALYSIS, MAGNETICALLY AND SPECTROSCOPICALLY (IR SPECTRA, UV-VIS SPECTRA, EPR SPECTRA, NMR SPECTRA, MASS SPECTRA), THERMAL ANALYSIS, X-RAY STRUCTURE …
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The selective separation and extraction of metals using membrane technology
… that are situated alongside each other in the Periodic Table. The work contained in this thesis shows the membrane extraction of the metals: Cobalt(II), Nickel(II). Iron(II) and Iron(III) in aqueous media using a polymer “entangled” membrane containing the extractant Aliquat 336 and PVC …
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The effect of cadmium on some enzymes in the developing chick embryo
… metal, is a member of ~roup· II b of the Periodic Table, and lies between zinc and mercury. Cadmium (Cd) possesses the following physical constants: Atomic number 48; atomic weight 112.4; valency 2 and specific gravity a.?. The metal melts at 321°C and boils at ?65°c, and is remarkably …
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The influence of cadmium on hepatic protein synthesis in the rat
… is placed between Zn and Hg in Group I IB of the Periodic Table. It is divalent, as are the Group I IA elements Ca and Mg. In order of electropotential, Zn, Cd and Hg fal I below Ca and Mg but above the transition elements, with which they do not have close relationships. They have low melting …
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Assessing byproduct mining and metal recycling as indicators of material criticality
… on using a broader suite of elements from the periodic table, and many agree that the future availability of a set of 'critical materials' is an issue of global concern. However, assessments of material criticality are often overly general, leading to excessive concerns by policy makers and …
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The development of a local orbital method and its applications to aluminum and platinum clusters
… enables the treatment of most elements in the periodic table including all $sp\sp3$ bonding elements and almost all transition metals with $sp\sp3d\sp5$ bondings. The task was a major modification (13,000 new lines of code), which involved almost all subroutines. We have tested this by …
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Alloying effects on high-temperature deformation behavior of nickel aluminide intermetallics
… three elements are next to one another on the periodic table, which will provide the electron number effect (Mo vs. Nb) and the atomic size effect (Cr vs. MO).;The specimens were tested at constant strain rates ranging from 10 -6 to 10-3 s-1. At high temperatures, the flow stress becomes …
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A study of the nature and origin of the minialbumins to be found in cadmium-poisoned animals
… metal belonging to the second sub-group of the Periodic Table. It has a boiling point of 768°c, melting point of 321°0, is remarkably volatile for a heavy metal, and exists naturaly as a mixture of eight isotopes, constituting 2 x 10-5% of the earth's crust. Extraction of cadmium is by …
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Formulating design rules to predict 2D materials and heterostructures for next-generation electronics
… science is to understand how atoms in the periodic table get arranged into materials with specific properties. Knowledge of the design rules and material descriptors for a given property will reduce reliance on serendipity in materials design and help us answer questions like, what is the …
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A Dirac all-electron basis and spin-orbit coupled projector implementation of the Projector Augmented Wave Method for atomic systems
… and of all fifth- and sixth-row elements of the periodic table. Prior to any molecular or solid calculation with the PAW method, one must construct robust sets of projector functions for each of the constituent atomic species. To capture the essential physics of these effects in atoms, we have …
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Recent Developments in X-Rays
… phenomena. The study of Roentgen rays is a profitable field for learning the connection between these two points of view. One also acquires some knowledge of the atom and of crystal structure. Perhaps the study is of most interest in identifying X-rays with light and seeing the relationship …
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Understanding the origins of metastability in thin film growth; tantalum and the early group VB-VIB metals
… in solid-state devices. Ta frequently forms metastable phases, including the well-known ss-phase, during the preparation of thin Ta films by standard film deposition methods such as sputtering and electro-deposition. In order to gain insight into Ta metastable phase formation, the Bain …
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High-Throughput Ab Initio Phase Diagram Prediction
… DFT with applicability and accuracy across the periodic table. The specific flavour of machine-learned interatomic potentials used in this work is the ephemeral data-derived potential (EDDP), which relies on a training set composed of small and diverse unit cells, whose energies are learned with …
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Molecular Dynamic Simulation of Polysiloxane
… microstructure region and the proximity in the periodic table that the elements present have. The process of forming phases such as Graphitic Carbon, Amorphous Carbon, Silicon Carbide. Silicon Oxide, and SiliconOxycarbide are not well understood. Simulation provides a route to understanding the …
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