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Uniformly de Bruijn Sequences and Symbolic Diophantine Approximation on Fractals
Article expanding the Intrinsic Diophantine approximation on fractals first proposed by K. Mahler (1984). This article describes and develops the theory of infinite de Bruijn sequences and answers questions related to Hausdorff dimension, Diophantine approximation, Dirichlet function, and height function.
Date:
April 27, 2018
Creator:
Fishman, Lior; Merrill, Keith & Simmons, David
Object Type:
Article
System:
The UNT Digital Library
The Unique Fold and Lability of the [2fe‑2s] Clusters of Neet Proteins Mediate Their Key Functions in Health and Disease
This article discusses the NEET fold and its structural elements.
Date:
February 12, 2018
Creator:
Karmi, Ola; Marjault, Henri-Baptiste; Pesce, Luca; Carloni, Paolo; Onuchic, José N.; Jennings, Patricia A. et al.
Object Type:
Article
System:
The UNT Digital Library
The universal shape of the X-ray variability power spectrum of AGN up to z ∼ 3
Authors of the article assert that they studied the ensemble X-ray variability properties of active galactic nuclei (AGN) over large ranges of timescale (20 ks ≤ T ≤ 14 yr), redshift (0 ≤ z ≲ 3), luminosity (1040 erg s−1 ≤ LX ≤ 1046 erg s−1), and black hole (BH) mass (106 ≤ M⊙ ≤ 109). The authors show that the data collected from archival observations and previous literature studies are fully consistent with a universal PSD form, which does not show any evidence for systematic evolution of shape or amplitude with redshift or luminosity, even if there may be differences between individual AGN at a given redshift or luminosity.
Date:
May 8, 2023
Creator:
Paolillo, Maurizio; Papadakis, I.; Brandt, William Nielsen; Bauer, Franz E.; Lanzuisi, G.; Allevato, V. et al.
Object Type:
Article
System:
The UNT Digital Library
Universality in a one-dimensional three-body system
Article studying a heavy-heavy-light three-body system confined to one space dimension.
Date:
July 24, 2019
Creator:
Happ, Lucas; Zimmermann, Matthias; Betelu, Santiago I.; Schleich, Wolfgang P. & Efremov, Maxim A.
Object Type:
Article
System:
The UNT Digital Library
Unraveling Δ1-Pyrroline-5-Carboxylate-Proline Cycle in Plants by Uncoupled Expression of Proline Oxidation Enzymes
Article showing that overexpression of MsProDH in tobacco and Arabidopsis or impairment of P5C oxidation in the Arabidopsis p5cdh mutant did not change the cellular Pro to P5C ratio under ambient and osmotic stress conditions, indicating that P5C excess was reduced to Pro in a mitochondrial-cytosolic cycle. Results show that normal oxidation of P5C to Glu by P5CDH is key to prevent P5C-Pro intensive cycling and avoid ROS production from electron run-off.
Date:
September 25, 2009
Creator:
Miller, Gad; Honig, Arik; Stein, Hanan; Suzuki, Nobuhiro; Mittler, Ron & Zilberstein, Aviah
Object Type:
Article
System:
The UNT Digital Library
Unsymmetric Pentacene- and Pentacenequinone-Fused Porphyrins: Understanding the Effect of Cross- and Linear-Conjugation
Article says that unsymmetric pentacenequinone-fused (cross-conjugated) and pentacene-fused (linear-conjugated) porphyrins were designed and synthesized. This work provides important and useful information on guiding new material designs.
Date:
July 29, 2022
Creator:
Moss, Austen; Nevonen, Dustin E.; Hu, Yi; Nesterov, Vladimir N.; Nemykin, Victor N. & Wang, Hong
Object Type:
Article
System:
The UNT Digital Library
Unusual Mathematical Approaches Untangle Nervous Dynamics
Article reports that the massive amount of available neurodata suggests the existence of a mathematical backbone underlying neuronal oscillatory activities. The authors assert that the Monge’s theorem might contribute to our visual ability of depth perception and the brain connectome can be tackled in terms of tunnelling nanotubes.
Date:
October 14, 2022
Creator:
Tozzi, Arturo & Mariniello, Lucio
Object Type:
Article
System:
The UNT Digital Library
Unusual Properties of Hydrogen-Bonded Ferroelectrics: The Case of Cobalt Formate
Article using first-principles simulations to predict room temperature ferroelectricity in a representative of the formate family, [NH₂NH₃][Co(HCOO)₃].
Date:
February 18, 2022
Creator:
Ghosh, P. S.; DeTellem, D.; Ren, J.; Witanachchi, S.; Ma, Shengqian; Lisenkov, S. et al.
Object Type:
Article
System:
The UNT Digital Library
An Updated Understanding of Texas Bumble Bee (Hymenoptera: Apidae) Species Presence and Potential Distributions in Texas, Usa
This article aims to update existing Texas bumble bee presence databases, model statewide species distributions, and identify conservation target areas.
Date:
August 10, 2017
Creator:
Beckham, Jessica L. & Atkinson, Samuel F.
Object Type:
Article
System:
The UNT Digital Library
Upper lethal temperatures of Northern Bobwhite embryos and the thermal properties of their eggs
This article explores the upper lethal temperature for Bobwhite eggs. Results find that thermal tolerances of Northern Bobwhite embryos are high, indicating an adaptation to the naturally occurring temperature extremes in the Bobwhite's environment. However, the results also indicate that high temperatures could have plausibly contributed to the population decline observed in the Bobwhite's semi-arid range.
Date:
January 1, 2012
Creator:
Reyna, Kelly S. & Burggren, Warren W.
Object Type:
Article
System:
The UNT Digital Library
Urban edge trees: Urban form and meteorology drive elemental carbon deposition to canopies and soils
Article asserts that urban tree canopies are a significant sink for atmospheric elemental carbon (EC)--and air pollutant that is a powerful climate-forcing agent and threat to human health. The authors' findings indicate that complex configurations of roads, buildings, and vegetation produce “urban edge trees” that contribute to heterogeneous EC deposition patterns across urban systems, with implications for greenspace planning.
Date:
September 27, 2022
Creator:
Ponette-González, Alexandra G.; Chen, Dongmei; Elderbrock, Evan; Rindy, Jenna E.; Barrett, Tate E.; Luce, Brett W. et al.
Object Type:
Article
System:
The UNT Digital Library
Urban Feature Extraction within a Complex Urban Area with an Improved 3D-CNN Using Airborne Hyperspectral Data
Article describes how airborne hyperspectral data has high spectral-spatial information, but mining and using this information effectively is still a great challenge. Therefore, a 3D-1D-CNN model was proposed for feature extraction in complex urban with hyperspectral images affected by cloud shadows.
Date:
February 10, 2023
Creator:
Ma, Xiaotong; Man, Qixia; Yang, Xinming; Dong, Pinliang; Yang, Zelong; Wu, Jingru et al.
Object Type:
Article
System:
The UNT Digital Library
Urinary Glycosaminoglycans Are Associated with Recurrent UTI and Urobiome Ecology in Postmenopausal Women
Article asserts that glycosaminoglycans (GAGs) are linear, negatively charged polysaccharides composed of repeating disaccharide units of uronic acid and amino sugars. To investigate the relationship between GAGs and recurrent urinary tract infection (rUTI), the authors profiled urinary GAGs in a controlled cohort of postmenopausal women.
Date:
March 21, 2023
Creator:
Neugent, Michael L.; Hulyalkar, Neha V.; Kumar, Ashwani; Xing, Chao; Zimmern, Philippe E.; Shulaev, Vladimir et al.
Object Type:
Article
System:
The UNT Digital Library
Using a Novel Approach to Estimate Packing Density and Related Electrical Resistance in Multiwall Carbon Nanotube Networks
Article using contrast image processing to estimate the concentration of multi-wall carbon nanotubes (MWCNT) in a given network.
Date:
September 25, 2020
Creator:
Philipose, Usha; Jiang, Yan; Farmer, Gavin; Howard, Chris; Harcrow, Michael; Littler, Chris et al.
Object Type:
Article
System:
The UNT Digital Library
Using CRISPR/Cas to enhance gene expression for crop trait improvement by editing miRNA targets
Article states that gene editing tools such as CRISPR/Cas9 are often thought of as a means to prevent gene expression; however, a more subtle and yet powerful approach is the enhancement of gene expression by precise deletion of repressor sites within a gene of interest. Authors argue that gene editing of miRNA target sites is preferable over deletion of the miRNA genes themselves, given that it avoids the pitfalls of unspecific derepression of miRNA target(s) beyond the gene of interest.
Date:
January 10, 2023
Creator:
Ferreira, Savio S. & Reis, Rodrigo S.
Object Type:
Article
System:
The UNT Digital Library
Using Machine Learning to Predict Genes Underlying Differentiation of Multipartite and Unipartite Traits in Bacteria
Article describes how, since the discovery of the second chromosome in the Rhodobacter spaeroides 2.4.1 in 1989 and the revelation of gene sequences, multipartite genomes have been reported in over three hundred bacterial species under nine different phyla. In this study, the authors have attempted to leverage machine learning as a means to identify the genetic factors that underlie the differentiation of bacteria with multipartite and unipartite genomes.
Date:
November 13, 2023
Creator:
Almalki, Fatemah; Sunuwar, Janak & Azad, Rajeev K.
Object Type:
Article
System:
The UNT Digital Library
Using solar radiation data in soil moisture diagnostic equation for estimating root-zone soil moisture
Article describes how the soil moisture daily diagnostic equation (SMDE) evaluates the relationship between the loss function coefficient and the summation of the weighted average of precipitation. The study has confirmed that using actual solar radiation data in the soil moisture daily diagnostic equation can improve its accuracy.
Date:
December 12, 2022
Creator:
Omotere, Olumide; Pan, Feifei & Wang, Lei
Object Type:
Article
System:
The UNT Digital Library
UV and infrared absorption spectra and 248 nm photolysis of maleic anhydride (C₄H₂O₃)
This article investigates maleic anhydride (C₂H₂(CO)₂O, Furan-2,5-dione) that is emitted into or formed in the atmosphere during bio-mass burning events as well as being a photochemical degradation product of some aromatic volatile organic compounds. The photochemical fate of maleic anhydride, however, is presently not well enough characterized to enable modeling of its impact on the environment and human health. In this study, the room temperature UV and infrared absorption spectra of maleic anhydride were measured and quantified using several complementary calibration methods.
Date:
July 2, 2019
Creator:
Marshall, Paul; Papadimitriou, Vassileios C.; Papanastasiou, Dimitrios K.; Roberts, James M. & Burkholder, James B. (James Bart), 1954-
Object Type:
Article
System:
The UNT Digital Library
Vehicle emissions-exposure alters expression of systemic and tissue-specific components of the renin-angiotensin system and promotes outcomes associated with cardiovascular disease and obesity in wild-type C57BL/6 male mice
This article investigates the hypothesis that exposure to engine emissions increases systemic and local adipocyte RAS signaling, promoting the expression of factors involved in cardiovascular disease and obesity.
Date:
April 15, 2021
Creator:
Phipps, Benjamin L.; Suwannasual, Usa; Lucero, JoAnn; Mitchell, Nicholas A. & Lund, Amie K.
Object Type:
Article
System:
The UNT Digital Library
Visualization of Lipid Droplet Composition by Direct Organelle Mass Spectrometry
Article reporting an approach that combines the visualization of individual lipid droplets (LDs), microphase extraction of lipid components from droplets, and the direct identification of lipid composition by nanospray mass spectrometry, even to the level of a single LD. The triacylglycerol (TAG) composition of LDs from several plant sources (mature cotton (Gossypium hirsutum) embryos, roots of cotton seedlings, and Arabidopsis thaliana seeds and leaves) were examined by direct organelle mass spectrometry and revealed the heterogeneity of LDs derived from different plant tissue sources.
Date:
February 4, 2011
Creator:
Horn, Patrick J.; Ledbetter, Nicole R.; James, Christopher N.; Hoffman, William D.; Case, Charlene R.; Verbeck, Guido F. et al.
Object Type:
Article
System:
The UNT Digital Library
VvLAR1 and VvLAR2 Are Bifunctional Enzymes for Proanthocyanidin Biosynthesis in Grapevine
This article shows that both Cys-EC and 4β-(S-cysteinyl)-catechin (Cys-C) are present in grapevine. The data from this study advance knowledge of PA building blocks and LAR function and provide targets for grapevine breeding to alter PA composition.
Date:
May 15, 2019
Creator:
Dixon, R. A.; Jun, Ji Hyung; Yu, Keji & Duan, Changqing
Object Type:
Article
System:
The UNT Digital Library
The Water-Water Cycle Is Essential for Chloroplast Protection in the Absence of Stress
Article showing that knockdown Arabidopsis plants with suppressed expression of the key water-water cycle enzyme, thylakoid-attached copper/zinc superoxide dismutase (KD-SOD), are suppressed in their growth and development. This article provides e genetic evidence for the importance of the water-water cycle in protecting the photosynthetic apparatus of higher plants from photooxidative damage.
Date:
October 3, 2003
Creator:
Rizhsky, Ludmila; Liang, Hongjian & Mittler, Ron
Object Type:
Article
System:
The UNT Digital Library
Waveguide Coupling via Magnetic Gratings with Effective Strips
This article provides an overview of an approach convenient for describing intermediate gratings for two types of applications: both metafilms and the coupling of incident waves to waveguide modes or diffraction orders.
Date:
April 14, 2018
Creator:
Roccapriore, Kevin M.; Lyvers, David P.; Brown, Dean P.; Poutrina, Ekaterina; Urbas, Augustine M.; Germer, Thomas A. et al.
Object Type:
Article
System:
The UNT Digital Library
Weakly Aligned Molecules: From Molecular Detectors to Room-Temperature Tunable Masers
Conference proceeding presenting a new mechanism of manipulation of population in molecular rotational levels in a weakly aligned molecules. Originally presented as an invited talk at the 29th International Laser Physics Workshop held July 19-23, 2021.
Date:
July 23, 2021
Creator:
Roy, Colin D.; Branković, Zorica & Rostovtsev, Yuri V.
Object Type:
Article
System:
The UNT Digital Library