Physical Sciences and Mathematics Commons^™

Mineralogy And Chemistry Of Rare Earth Elements In Alkaline Ultramafic Rocks And Fluorite In The Western Kentucky Fluorspar District, Warren H. Anderson

Report of Investigations--KGS

Rare earth elements, or REE, are used in modern society in televisions, computers, cellphones, military equipment, and smart weapons systems. These metals are also used by the medical industry in magnetic resonance imaging and in medical products.

The igneous rocks in the Western Kentucky Fluorspar District of the New Madrid Rift System are considered alkaline ultramafic rocks that are slightly enriched in REE. These rocks are rare and only occur in several hundred locations in the world. They have a complex history of emplacement, fractionation, metasomatism, and alteration, and are overprinted with Mississippi Valley-type mineralization. They are classified as lamprophyres …

Striking The Right Balance Of Intermolecular Coupling For High-Efficiency Singlet Fission, Ryan D. Pensack, Andrew J. Tilley, Christopher Grieco, Geoffrey E. Purdum, Evgeny E. Ostroumov, Devin B. Granger, Daniel G. Oblinsky, Jacob C. Dean, Grayson S. Doucette, John B. Asbury, Yueh-Lin Loo, Dwight S. Seferos, John E. Anthony, Gregory D. Scholes

Chemistry Faculty Publications

Singlet fission is a process that splits collective excitations, or excitons, into two with unity efficiency. This exciton splitting process, unique to molecular photophysics, has the potential to considerably improve the efficiency of optoelectronic devices through more efficient light harvesting. While the first step of singlet fission has been characterized in great detail, subsequent steps critical to achieving overall highly-efficient singlet-to-triplet conversion are only just beginning to become well understood. One of the most elementary suggestions, which has yet to be tested, is that an appropriately balanced coupling is necessary to ensure overall highly efficient singlet fission; that is, the …

The Nobel Prize In Chemistry 2015: Exciting Discoveries In Dna Repair By Aziz Sancar, David K. Orren

Toxicology and Cancer Biology Faculty Publications

On October 7, 2015, the Nobel Prize in Chemistry for 2015 was awarded to three deserving scientists for their pioneering research on DNA repair. Tomas Lindahl was recognized for studies that uncovered the inherent instability of DNA as well as the mechanism of the base excision repair pathway, Paul Modrich for characterization of the mismatch repair pathway, and Aziz Sancar for mechanistic elucidation of the nucleotide excision repair (NER) pathway. For me, the announcement of these awards in my area of research was extremely gratifying, particularly so because Aziz was my mentor during my Ph.D. studies that examined the steps …

Low Voltage Electrowetting Device And Method For Making Same, Yuguang Cai, Xiaoning Zhang

Chemistry Faculty Patents

An electrowetting device includes a substrate having a first face, a charged adhesion layer immobilized on the first face of the substrate and a dielectric layer bound to the charged adhesion layer. An unbound ionic liquid phase contacts the dielectric layer.

Systems And Methods For Diagnosis And Monitoring Of Bacteria-Related Conditions, Sylvia Daunert, Sapna K. Deo, Patrizia Pacini, Anjali Kumari Struss, Harohalli Shashidhar, Deborah R. Auer Flomenhoft, Nilesh Raut

Chemistry Faculty Patents

The presently-disclosed subject matter provides systems, methods, and kits for diagnosing and/or monitoring a bacteria-related condition of interest in a subject by providing a cell sensing system, each system containing a reporter molecule capable of detecting binding of a quorum sensing molecule and capable of generating a detectable signal.

Thiol-Containing Compounds For The Removal Of Elements From Tissues And Formulations Therefor, Boyd E. Haley, David A. Atwood, Niladri Gupta

Chemistry Faculty Patents

Methods and pharmaceutical formulations for ameliorating heavy metal toxicity and/or oxidative stress are disclosed, comprising administering pharmaceutically effective amounts of ligands according to the present disclosure.

To see the remainder of the abstract, please download this patent.

Class Of Ferromagnetic Semiconductors, Larysa Shlyk, Sergiy A. Kryukov, Lance E. De Long, Barbara Schüpp-Niewa, Rainer Niewa

Physics and Astronomy Faculty Patents

Single crystal and polycrystal oxoruthenates having the generalized compositions (Ba_z,Sr_1−z)Fe_xCo_yRu_6−(x+y)O₁₁ (1≦(x+y)≦5; 0≦z≦1) and (Ba,Sr)M_2±xRu_4∓xO₁₁ (M=Fe,Co) belong to a novel class of ferromagnetic semiconductors with applications in spin-based field effect transistors, spin-based light emitting diodes, and magnetic random access memories.

Organic Thin-Film Transistors And Tips-Pentacene, Zachary Stewart

Lewis Honors College Capstone Collection

TIPS-Pentacene, an organic semiconductor characterized by its good electronic properties, solubility, and stability, is used primarily in organic thin-film transistors (OTFT). This research seeks to create an OTFT by crafting a stencil, depositing the source and drain onto a substrate’s surface, and processing TIPS-Pentacene onto the channel between them. In addition, if time permits, the electronic properties of several OTFTs will be compared to determine how to optimize their production.

Progress Towards The Synthesis Of Type B Polycyclic Polyprenylated Acylphloroglucinol 7-Epi-Clusianone, Pushpa Suresh Jayasekara Mudiyanselage

University of Kentucky Doctoral Dissertations

Plants of the family Guttiferae produce polycyclic polyprenylated acylphloroglucinols (PPAPs), which have interesting biological activities including anticancer and antibacterial properties. The main structural features of PPAPs comprise of bicyclo[3.3.1]nonane-2,4,9-triketone with one acyl group together with prenyl, geranyl, or other C₁₀H₁₇ groups. 7-epi-Clusianone, a type B PPAP with C-7 endo stereochemistry, is being approached by establishing the cis relationship with C(4) allyl group and C(2) methyl ester in the early stage of the synthesis. Then C(2) methyl ester is converted to alkyne aldehyde and syn reduction followed by intramolecular aldol reaction to give bicyclo[3.3.1]nonane structure with …