Effect of calcination on the energy storage capacity metal-organic framework-derived cobalt oxides

High-performance energy storage devices are much needed to meet the growing energy demand. Growing populations, use of smart devices, and increasing demand for electric vehicles are some of the energydemanding factors. Batteries and supercapacitors are some of the high-performance devices which can meet the growing demand for portable energy. These devices should provide high energy density, long cycle life, improved safety, and eco-friendliness. Supercapacitors are attracting considerable attention due to many characteristics such as high energy and power density with significantly high cycle life. However, to meet the current energy demand, their energy storage capacity has to be improved. In this work, many cobalt oxidesbased nanomaterials were synthesized using metal-organic frameworks (MOF). The MOF-derived cobalt oxides provided tunable surface area and porosity. The electrochemical properties of these materials were tuned by calcining these samples at various temperatures which affected their morphology, crystallinity, and surface area. These changes largely affected the electrochemical properties of these materials and thus the energy storage capacity. The electrochemical properties of the synthesized materials were studied using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The energy storage capacity of these materials was in the range of 41 to 203 F/g depending on the growth conditions. The energy storage capacity of these materials was increased from 2 Wh/kg to about 9 Wh/kg. This study suggests that facile approaches such as simple calcination could significantly improve the electrochemical properties of MOF-derived cobalt oxide materials and could be used as electrode materials in supercapacitor devices

Metal-Oxide Frameworks-based Cobalt Oxides as Efficient Electrocatalysts

Green energy production via cost-effective ways is one of the main requirements in current days. Hydrogen as a green fuel source is very attractive for a sustainable future as hydrogen is considered a zero-carbon emission fuel. Hydrogen can be produced via many routes. Among many approaches, hydrogen generation via water splitting is one of the greenest ways to get green fuel. In most cases, hydrogen production via water splitting requires efficient electrocatalysts to reduce the overpotential (extra cost) of this process. Platinum and rareearth-based materials are considered efficient electrocatalysts, however, their high cost is one of the limiting factors. process. In this work, metal oxide framework-based cobalt oxides were synthesized and used as efficient electrocatalysts for water splitting applications. The nanostructured MOF-based cobalt oxides were prepared using a facile method that can be easily adapted for commercial applications. The samples were hoghly porous with a high surface area which acted as active sites for electrocatalytic activities. The materials\u27 properties were tuned by calcining the samples at various temperatures. These materials showed low overpotential in the range of 75 to 137 mV to achieve a current density of 10 mA/cm2 for hydrogen production. Depending on the growth conditions, these materials required an overpotential in the range of 370 to 440 mV for oxygen production. These materials showed stable performance for up to 1,000 cycles of cyclic voltammetric studies suggesting possible commercial applications in fuel cell technology

Restricting Bunk Space Allotments to 6 or 10 Inches has Minimal Impact on Growth Performance in Limit-Fed Receiving Cattle

Objective:The objective of our experiment was to determine if bunk allotments of 6, 10, 14, or 18 in per head in pens containing 18 to 28 head impacts growth performance of growing calves limit-fed a high-energy dietbased on corn and corn co-products. Study Description:A total of 332 crossbred heifers were blocked by source, stratified by individual arrival weight, and assigned to a pen. Pens were randomly assigned to one of four treatments: 6, 10, 14, and 18 in of bunk space per head. Pens contained 18 to 28 head per pen. Heifers were limit-fed once daily at 2.0% of body weight (BW) [dry matter (DM) basis] for a 56-day period. Results:Final BW and average daily gains (ADG) following the 56-day period did not differ (P≥ 0.20) among treatments. The standard deviation of ADG responded quadratically (P= 0.05) where variation in weight gain was greater in calves allotted 14 in of bunk compared with calves allotted 6, 10, or 18 in of bunk. The Bottom Line:Bunk allotments as low as 6 in per head did not reduce the growth performance of limit-fed growing cattle during a 56-day receiving period

Concert recording 2018-11-29

[Track 1]. French suite. I. Prelude [Track 2]. III. Gavotte / Yvonne Desportes -- [Track 3]. Flower duet from Lakmé / Léo Delibes -- [Track 4]. Hilltribe dance / Yos Vannesorn -- [Track 5]. Toccata and fugue in D minor, BMV 565 / J.S. Bach arranged by A. Brackett -- [Track 6]. Molly on the shore / Percy Grainger arranged by S. Knight -- [Track 7]. Chorale and danza / Vaclac Nelhybel -- [Track 8]. Klezmer suite / Alexis Ciesla

Concert recording 2019-04-17

[Track 1]. Concerto for clarinet and string orchestra / Aaron Copland -- [Track 2]. Dance preludes. I. Allegro molto [Track 3]. II. Andantino [Track 4]. III. Allegro giocoso / Witold Lutoslawski -- [Track 5]. Sonata for clarinet and piano in B♭major. I. Mäβig bewegt [Track 6]. IV. Kleines rondo. Gemächlich / Paul Hindemith -- [Track 7]. Five bagatelles, op. 23. I. Prelude / Gerald Finzi -- [Track 8]. Five bagatelles, op. 23. V. Fughetta / Gerald Finzi -- [Track 9]. Sonata for clarinet in B♭ and piano. I. Allegro tristamente / Francis Poulenc -- [Track 10]. Sonata for clarinet in B♭ and piano. III. Allegro con fuoco / Francis Poulenc -- [Track 11]. Introduction, theme and variations: Theme, var. 1, 2, 3, minor and major / Gioachino Rossini -- [Track 12]. Time pieces. I. Allegro risoluto [Track 13]. II. Andante espressivo / Robert Muczynski -- [Track 14].Sonata for clarinet, op. 120, no. 1. I. Allegro appassionato / Johannes Brahms -- [Track 15]. Wind in the reeds. I. March [Track 16]. II. Humoreske [Track 17]. III. A childhood memory [Track 18]. IV. Ballet russe / Gordon Jacob

COVID-19 Impact Assessment and Future Strategies

This capstone project is in collaboration with Dr. Liz Mogford’s sociology capstone project titled Population Health Advocacy. The class was invited by the Whatcom County Health Department to conduct research on city and county Community Health Improvement priorities. These priorities include racial equity, youth mental health, housing and economic security. As part of a research team, we conducted interviews with 30 participants who were identified for their expertise in these priority areas. Our class was split into priority subgroups to conduct interviews and then, as an entire class, we analyzed our interviews to find commonalities across the three priorities. Our goal was to find the social determinants of health that could inform upstream solutions to the observed problems. After the analyzes by the priority subgroups were complete, I complied the analyzes and finalized the paper. The result is a document that helps inform programs, practices, and policy that were presented to the Health Department, the Board of Health, and the Public Health Advisory Board

A three gene DNA methylation biomarker accurately classifies early stage prostate cancer

Background: We identify and validate accurate diagnostic biomarkers for prostate cancer through a systematic evaluation of DNA methylation alterations. Materials and methods: We assembled three early prostate cancer cohorts (total patients = 699) from which we collected and processed over 1300 prostatectomy tissue samples for DNA extraction. Using real-time methylation-specific PCR, we measured normalized methylation levels at 15 frequently methylated loci. After partitioning sample sets into independent training and validation cohorts, classifiers were developed using logistic regression, analyzed, and validated. Results: In the training dataset, DNA methylation levels at 7 of 15 genomic loci (glutathione S-transferase Pi 1 [GSTP1], CCDC181, hyaluronan, and proteoglycan link protein 3 [HAPLN3], GSTM2, growth arrest-specific 6 [GAS6], RASSF1, and APC) showed large differences between cancer and benign samples. The best binary classifier was the GAS6/GSTP1/HAPLN3 logistic regression model, with an area under these curves of 0.97, which showed a sensitivity of 94%, and a specificity of 93% after external validation. Conclusion: We created and validated a multigene model for the classification of benign and malignant prostate tissue. With false positive and negative rates below 7%, this three-gene biomarker represents a promising basis for more accurate prostate cancer diagnosis

The History of UofSC\u27s Gibbes Green

The following report is a culmination of papers from the Spring 2022 students of Dr. Christian Anderson’s Evolution of Higher Education and Dr. Lydia Brandt’s History of American Architecture courses. The report contains research conducted on the creation of Gibbes Green on the University of South Carolina’s campus. Gibbes Green was the first major expansion made by the university, and signifies an era of development and growth for both the school and Higher Education as a whole