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The Listener Festival Brahmaputra
No full textShobhana Chelliah on documentation and digital archiving
Mahabharata Storytelling Wari Liba from Manipur
No full textT. Shyamkanhai Singh performs an episode from the Mahabharata in traditional Wari Liba style
University Memories from the Texas Fashion Collection Department
No full textPhotograph of UNT Art Education Professor Tyson Lewis and his graduate course focused on Dialogue and Inquiry, reviewing artifacts and related primary sources at the Texas Fashion Collection in the TFC space in Welch Street Complex 1
NeuraRec - Comparative Reconstruction of Proto-Languages using Artificial Neural Networks
No full textData management plan for the grant, "NeuraRec - Comparative Reconstruction of Proto-Languages using Artificial Neural Networks.
Dibyajyoti Jana Collection
No full textThis is an annotation of some consonant minimal pairs recorded in Chorei
Design and Synthesis of Βeta-Functionalized Porphyrins and Advanced Porous Materials
No full textIn this dissertation, I present a new series of beta-functionalized porphyrins and investigate their optical, electronic, and photophysical properties. Building on these beta-functionalized porphyrins, I describe the design and synthesis of a novel class of two-dimensional π-extended porphyrin-based covalent organic frameworks (THCOFs). This novel class of COFs incorporates both a porphyrin electron donor and a porphyrin electron acceptor. The resulting THCOFs feature a staggered AB stacking structure with polygonal pores, exhibiting high crystallinity and exceptional chemical stability. The extended π-conjugated backbone, coupled with strong interlayer π–π interactions, endows the THCOFs with broad light absorption across the visible light region with low band gaps. Furthermore, I investigate the challenges associated with metal inserted porphyrin to synthesis COFs and successfully demonstrate from small molecular systems to extended framework materials by employing a post-synthetic metal insertion approach
Upgrade and Testing of a Scanning Light Ion Microprobe for Investigation of Astrocytes and Development of a System for Light Elemental Analysis
No full textThe scanning light ion microprobe at the Ion Beam Laboratory was upgraded for the purpose of investigating the relative elemental concentration and intracellular distribution within astrocytes. The microprobe’s upgraded analytical capabilities allow for the quick and non-destructive determination of a sample’s relative elemental concentrations with parts per million (ng/mg) sensitivity, thickness with 10 nm depth resolution and density uniformity. When coupled with its sub-cellular spatial imaging resolution, it becomes a very useful tool for bio-related research. Upgrades performed on the microprobe included a new data acquisition system, additional lenses to the focusing lens system and the installation of an array of detectors. Included examples show it was capable of distinguishing features of 5 μm or less in size and focusing a 2 MeV H+ beam to a 487 x 516 nm2 spot size. Neonatal rat cortical astrocytes were used to verify the ability to analyze single cells. The methodology for sample preparation and analysis of the biological cells are reported here. The analysis results of this preliminary investigation showed the ability to determine the bulk concentrations and distribution of elements within individual cells. Additionally, a prototype device (Patent app. No. 63/507,884) was designed as part of a light element particle induced X-ray emission (PIXE) system for the detection and quantification of trace elements with Z<13. The device makes use of a magnetic field to deflect backscattered protons of up to 1.219 MeV, preventing damage to the X-ray detector. The light element PIXE system was tested at 1 MeV with a variety of samples and can detect elements as light as boron