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in subjects: "Crystallography"  
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Precession Electron Diffraction Assisted Characterization of Deformation in α and α+β Titanium Alloys

Description: Ultra-fine grained materials with sub-micrometer grain size exhibit superior mechanical properties when compared with conventional fine-grained material as well as coarse-grained materials. Severe plastic deformation (SPD) techniques have been shown to be an effective way to modify the microstructure in order to improve the mechanical properties of the material. Crystalline materials require dislocations to accommodate plastic strain gradients and maintain lattice continuity. The lattice curvat… more
Date: August 2015
Creator: Liu, Yue
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

BES Science Network Requirements

Description: The Energy Sciences Network (ESnet) is the primary provider of network connectivityfor the US Department of Energy Office of Science (SC), the single largest supporter of basic research in the physical sciences in the United States. In support of the Office ofScience programs, ESnet regularly updates and refreshes its understanding of the networking requirements of the instruments, facilities, scientists, and science programs that it serves. This focus has helped ESnet to be a highly successful… more
Date: February 1, 2011
Creator: Dart, Eli; Tierney, Brian; Dart, Eli; Biocca, A.; Carlson, R.; Chen, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Progress Report

Description: The BIOMOL grant was for 'Local System Support for PDB Biological Unit Search and Display' to augment Rasmol's [Bernstein 2000] [Sayle, Milner-White 1995] existing macromolecular display functions with new capabilities by taking advantage of recent increases in local computing power in order to move functionality that is now scattered among various local and remote systems into one local package. Work included new algorithms for molecular surface display, an extended format for Protein Data Ban… more
Date: February 6, 2012
Creator: Bernstein, Herbert J.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Anomalous X-ray Diffraction Studies for Photovoltaic Applications

Description: Anomalous X-ray Diffraction (AXRD) has become a useful technique in characterizing bulk and nanomaterials as it provides specific information about the crystal structure of materials. In this project we present the results of AXRD applied to materials for photovoltaic applications: ZnO loaded with Ga and ZnCo{sub 2}O{sub 4} spinel. The X-ray diffraction data collected for various energies were plotted in Origin software. The peaks were fitted using different functions including Pseudo Voigt, Ga… more
Date: June 22, 2011
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Crystallographic Complex Reflection Groups and the Braid Conjecture

Description: Crystallographic complex reflection groups are generated by reflections about affine hyperplanes in complex space and stabilize a full rank lattice. These analogs of affine Weyl groups have infinite order and were classified by V.L. Popov in 1982. The classical Braid theorem (first established by E. Artin and E. Brieskorn) asserts that the Artin group of a reflection group (finite or affine Weyl) gives the fundamental group of regular orbits. In other words, the fundamental group of the spac… more
Date: August 2017
Creator: Puente, Philip C
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Compressive auto-indexing in femtosecond nanocrystallography

Description: Ultrafast nanocrystallography has the potential to revolutionize biology by enabling structural elucidation of proteins for which it is possible to grow crystals with 10 or fewer unit cells. The success of nanocrystallography depends on robust orientation-determination procedures that allow us to average diffraction data from multiple nanocrystals to produce a 3D diffraction data volume with a high signal-to-noise ratio. Such a 3D diffraction volume can then be phased using standard crystallo… more
Date: September 20, 2010
Creator: Maia, Filipe; Yang, Chao & Marchesini, Stefano
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Role of Crystallographic Texture in Achieving Low Friction Zinc Oxide Nanolaminate Films

Description: Metal oxide nanolaminate films are potential high temperature solid lubricants due to their ability to exhibit significant plasticity when grain size is reduced to the nanometer scale, and defective growth structure is achieved by condensation of oxygen vacancies to form intrinsic stacking faults. This is in contrast to conventional microcrystalline and single crystal oxides that exhibit brittle fracture during loading in a sliding contact. This study emphasizes the additional effect of growt… more
Date: December 2015
Creator: Mojekwu, Nneoma
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

GENETIC ANALYSIS OF ABSCISIC ACID BIOSYNTHESIS

Description: The carotenoid cleavage dioxygenases (CCD) catalyze synthesis of a variety of apo-carotenoid secondary metabolites in plants, animals and bacteria. In plants, the reaction catalyzed by the 11, 12, 9-cis-epoxy carotenoid dioxygenase (NCED) is the first committed and key regulated step in synthesis of the plant hormone, abscisic acid (ABA). ABA is a key regulator of plant stress responses and has critical functions in normal root and seed development. The molecular mechanisms responsible for deve… more
Date: January 10, 2012
Creator: R, MCCARTY D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2010 Diffraction Methods in Structural Biology

Description: Advances in basic methodologies have played a major role in the dramatic progress in macromolecular crystallography over the past decade, both in terms of overall productivity and in the increasing complexity of the systems being successfully tackled. The 2010 Gordon Research Conference on Diffraction Methods in Structural Biology will, as in the past, focus on the most recent developments in methodology, covering all aspects of the process from crystallization to model building and refinement,… more
Date: March 10, 2011
Creator: Gonzalez, Ana
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Molecular Characterization of Bacterial Respiration on Minerals

Description: The overall aim of this project was to contribute to our fundamental understanding of proteins and biological processes under extreme environmental conditions. We sought to define the biochemical and physiological mechanisms that underlie biodegradative and other cellular processes in normal, extreme, and engineered environments. Toward that end, we sought to understand the substrate oxidation pathways, the electron transport mechanisms, and the modes of energy conservation employed during resp… more
Date: April 26, 2013
Creator: Blake, Robert C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Understanding and predicting metallic whisker growth and its effects on reliability : LDRD final report.

Description: Tin (Sn) whiskers are conductive Sn filaments that grow from Sn-plated surfaces, such as surface finishes on electronic packages. The phenomenon of Sn whiskering has become a concern in recent years due to requirements for lead (Pb)-free soldering and surface finishes in commercial electronics. Pure Sn finishes are more prone to whisker growth than their Sn-Pb counterparts and high profile failures due to whisker formation (causing short circuits) in space applications have been documented. At … more
Date: January 1, 2012
Creator: Michael, Joseph Richard; Grant, Richard P.; Rodriguez, Mark Andrew; Pillars, Jamin; Susan, Donald Francis; McKenzie, Bonnie Beth et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Titanium Boride Formation and Its Subsequent Influence on Morphology and Crystallography of Alpha Precipitates in Titanium Alloys

Description: Over the last two decades there has been an increased interest in understanding the influence of trace boron additions in Ti alloys. These additions refine the prior β grain size in as-cast Ti alloys along with increasing their modulus and yield strength due to the precipitation of TiB. TiB also acts as a heterogeneous nucleation site for α precipitation and has been shown to influence the α phase morphology. B is completely soluble in liquid Ti but has a negligible solubility in both body cent… more
Date: December 2013
Creator: Nandwana, Peeyush
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Chlorido(4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine)platinum(II) chloride toluene monosolvate

Description: In the title compound, [PtCl(C₂₇H₃₅N₃)]Cl·C₇H₈, the Ptᴵᴵ atom is coordinated in a pseudo-square-planar fashion by the N atoms of a 4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine ligand and a Cl atom.
Date: November 22, 2010
Creator: Batrice, Rami J.; Nesterov, Vladimir N. & Smucker, Bradley W.
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
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