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ALMA Observations of Quasar Host Galaxies at z ≃ 4.8 (open access)

ALMA Observations of Quasar Host Galaxies at z ≃ 4.8

Article presents ALMA Band 7 data of the [C ıı] 𝜆157.74 𝜇m emission line and underlying far-IR (FIR) continuum for 12 luminous quasars at 𝓏 ≃ 4.8 powered by fast-growing supermassive black holes (SMBHs).
Date: May 27, 2020
Creator: Shemmer, Ohad; Nguyen, Nathen H.; Lira, Paulina; Trakhtenbrot, Benny; Netzer, Hagai; Cicone, Claudia et al.
Object Type: Article
System: The UNT Digital Library
Biosynthesis of 6-Hydroxymellein Requires a Collaborating Polyketide Synthase-like Enzyme (open access)

Biosynthesis of 6-Hydroxymellein Requires a Collaborating Polyketide Synthase-like Enzyme

This article investigates a new architecture for iterative Type I polyketide synthases (PKS) from fungi.
Date: May 10, 2021
Creator: Kahlert, Lukas; Villanueva, Miranda; Cox, Russell J. & Skellam, Elizabeth
Object Type: Article
System: The UNT Digital Library
Can X-Ray Observations Improve Optical-UV-based Accretion-rate Estimates for Quasars? (open access)

Can X-Ray Observations Improve Optical-UV-based Accretion-rate Estimates for Quasars?

Article presents a study utilizing a carefully selected sample of 53 radio-quiet quasars that have Hβ and C iv λ1549 spectroscopy as well as Chandra coverage, to search for a robust accretion-rate indicator for quasars, particularly at the highest-accessible redshifts (z ∼ 6–7).
Date: May 23, 2022
Creator: Marlar, Andrea
Object Type: Article
System: The UNT Digital Library

Chandra and Magellan/FIRE follow-up observations of PSO167–13: An X-ray weak QSO at z = 6.515

This article presents the results of follow-up observations of the z = 6.515 radio-quiet QSO PSO167–13, which is interacting with a close companion galaxy with the goal to confirm the existence of the X-ray source and to investigate the rest-frame UV properties of the QSO. The authors observed the PSO167–13 system with Chandra/ACIS-S (177 ks) and obtained new spectroscopic observations (7.2 h) with Magellan/FIRE.
Date: May 27, 2021
Creator: Vito, F.; Brandt, William Nielsen; Ricci, F.; Congui, E.; Connor, T.; Bañados, E. et al.
Object Type: Article
System: The UNT Digital Library
Climate Metrics for C1–C4 Hydrofluorocarbons (HFCs) (open access)

Climate Metrics for C1–C4 Hydrofluorocarbons (HFCs)

This article looks at hydrofluorocarbons (HFCs) which are potent greenhouse gases that are potential substitutes for ozone depleting substances. The Kigali amendment lists 17 HFCs that are currently in commercial use to be regulated under the Montreal Protocol. Future commercial applications may explore the use of other HFCs, most of which currently lack an evaluation of their climate metrics. In this work, atmospheric lifetimes, radiative efficiencies (REs), global warming potentials (GWPs), and global temperature change potentials (GTPs) for all saturated HFCs with fewer than 5 carbon atoms are estimated to help guide future usage and policy decisions.
Date: May 11, 2020
Creator: Burkholder, James B. (James Bart), 1954-; Marshall, Paul; Bera, Partha P.; Francisco, Joseph S. & Lee, Timothy J.
Object Type: Article
System: The UNT Digital Library
Collaborative Research: Using Uncertainty Quantification and Validated Computational Models to Analyze Pumping Performance of Valveless, Tubular Hearts (open access)

Collaborative Research: Using Uncertainty Quantification and Validated Computational Models to Analyze Pumping Performance of Valveless, Tubular Hearts

Data management plan for the research grant, "Collaborative Research: Using Uncertainty Quantification and Validated Computational Models to Analyze Pumping Performance of Valveless, Tubular Hearts." This project will develop a computational model of the essential features of the circulatory system: the electrical activity of the heart, muscle contractions of the tube walls, and the fluid-structure interactions of the heart walls and blood within. This computational framework aims to be faithful to that of a real, model animal (tunicate, or sea squirt). The model will then be analyzed with mathematical tools to determine the physical limits of the pumping system. Results of this project will improve the understanding of human heart development at the earliest stages. Also, it will point to how the large, multi-chambered hearts of vertebrates could have evolved from smaller structures.
Date: 2022-05-01/2025-04-30
Creator: He, Yanyan & Cain, John
Object Type: Text
System: The UNT Digital Library
Combined influence of soil moisture and atmospheric humidity on land surface temperature under different climatic background (open access)

Combined influence of soil moisture and atmospheric humidity on land surface temperature under different climatic background

Article describes how soil moisture (SM) and atmospheric humidity (AH) are crucial climatic variables that significantly affect the climate system. However, the combined influencing mechanisms of SM and AH on the land surface temperature (LST) under global warming are still unclear. The authors systematically analyzed the interrelationships among annual mean values of SM, AH, and LST using ERA5-Land reanalysis data and revealed the role of SM and AH on the spatiotemporal variations of LST through mechanism analysis and regression methods.
Date: May 9, 2023
Creator: Jiang, Kang; Pan, Zhihua; Pan, Feifei; Teuling, Adriaan J.; Han, Guolin; An, Pingli et al.
Object Type: Article
System: The UNT Digital Library
Comment on ‘Extremely rapid self-reactions of hydrochlorofluoromethanes and hydrochlorofluoroethanes and implications in destruction of ozone’ (open access)

Comment on ‘Extremely rapid self-reactions of hydrochlorofluoromethanes and hydrochlorofluoroethanes and implications in destruction of ozone’

Article comments on the claims made by the authors of the original article. The authors of the commentary note flaws in the DFT-based methodology and the commentators describe differences between their application and the original article's described application.
Date: May 26, 2022
Creator: Marshall, Paul & Burkholder, James B. (James Bart), 1954-
Object Type: Article
System: The UNT Digital Library
A conserved oxalyl-coenzyme A decarboxylase in oxalate catabolism (open access)

A conserved oxalyl-coenzyme A decarboxylase in oxalate catabolism

Article presents research on oxalate catabolism in plants.
Date: May 5, 2022
Creator: Cheng, Ninghui; Paris, Vincent; Rao, Xiaolan; Wang, Xiaoqiang & Nakata, Paul A.
Object Type: Article
System: The UNT Digital Library
Deep Minima in the Triply Differential Cross Section for Ionization of Atomic Hydrogen by Electron and Positron Impact (open access)

Deep Minima in the Triply Differential Cross Section for Ionization of Atomic Hydrogen by Electron and Positron Impact

Article investigating ionization of atomic hydrogen by electron- and positron-impact. This article belongs to the Special Issue: Interactions of Positrons with Matter and Radiation.
Date: May 29, 2020
Creator: DeMars, C. M.; Ward, S. J.; Colgan, J.; Amami, S. & Madison, D. H.
Object Type: Article
System: The UNT Digital Library
Delayed Antarctic melt season reduces albedo feedback (open access)

Delayed Antarctic melt season reduces albedo feedback

Article discusses how Antarctica's response to climate change varies greatly both spatially and temporally. The authors used a 43-year record of Antarctic snow melt seasons from space-borne microwave radiometers with a machine-learning algorithm to show that both the onset and the end of the melt season are being delayed.
Date: May 27, 2023
Creator: Liang, Lei; Guo, Huadong; Liang, Shuang; Li, Xichen; Moore, John C.; Li, Xinwu et al.
Object Type: Article
System: The UNT Digital Library
Discovery of the first heavily obscured QSO candidate at z > 6 in a close galaxy pair (open access)

Discovery of the first heavily obscured QSO candidate at z > 6 in a close galaxy pair

This article reports the Chandra discovery of the first heavily obscured QSO candidate in the early universe, hosted by a close (≈5 kpc) galaxy pair at z = 6.515.
Date: May 17, 2022
Creator: Vito, F.; Brandt, William Nielsen; Bauer, Franz E.; Gilli, Roberto; Luo, B.; Zamorani, G. et al.
Object Type: Article
System: The UNT Digital Library
Do gene-environment interactions play a role in COVID-19 distribution? The case of Alpha-1 Antitrypsin, air pollution and COVID-19 (open access)

Do gene-environment interactions play a role in COVID-19 distribution? The case of Alpha-1 Antitrypsin, air pollution and COVID-19

This article evaluates the role that gene-environment interaction between air-pollution and Alpha-1 Antitrypsin (AAT) genes plays in the severity of COVID-19. Results find parallelism between the number of COVID deaths and the AAT*air pollution global risk in Europe.
Date: May 7, 2021
Creator: Murgia, Nicola; Corsico, Angelo Guido; D'Amato, Gennaro; Maesano, Cara Nichole; Tozzi, Arturo & Annesi-Maesano, Isabella
Object Type: Article
System: The UNT Digital Library
Dual activity of anthocyanidin reductase supports the dominant plant proanthocyanidin extension unit pathway (open access)

Dual activity of anthocyanidin reductase supports the dominant plant proanthocyanidin extension unit pathway

This article presents research on genetic and biochemical analyses that shows ANR has dual activity and is involved not only in the production of (−)-epicatechin starter units but also in the formation of 2,3-cis-leucocyanidin to serve as (−)-epicatechin extension units. The results find that differences in the product specificities of ANRs account for the presence/absence of PA polymerization and the compositions of PAs across plant species
Date: May 14, 2021
Creator: Jun, Ji Hyung; Lu, Nan; Docampo-Palacios, Maite; Wang, Xiaoqiang & Dixon, R. A.
Object Type: Article
System: The UNT Digital Library
Electrocatalytic proton-reduction behaviour of telluride-capped triiron clusters: tuning of overpotentials and stabilization of redox states relative to lighter chalcogenide analogues (open access)

Electrocatalytic proton-reduction behaviour of telluride-capped triiron clusters: tuning of overpotentials and stabilization of redox states relative to lighter chalcogenide analogues

Article investigating the utility of the non-biological element tellurium as a replacement for the widely biologically-utilized lighter chalcogenides sulfur and selenium in the realm of proton-reduction catalysis.
Date: May 14, 2020
Creator: Hrovat, David A.; Richmond, Michael G.; Rahaman, Ahibur; Lisensky, George C.; Browder-Long, Jess; Nordlander, Ebbe et al.
Object Type: Article
System: The UNT Digital Library
Formation of cotton bast fiber as a means to modulate carbon capture and increase bio-product utilization (open access)

Formation of cotton bast fiber as a means to modulate carbon capture and increase bio-product utilization

Data management plan for the grant "Formation of cotton bast fiber as a means to modulate carbon capture and increase bio-product utilization."
Date: 2023-05-01/2026-04-30
Creator: Ayre, Brian G.
Object Type: Text
System: The UNT Digital Library
G-RISE at the University of North Texas (open access)

G-RISE at the University of North Texas

Data management plan for the grant "G-RISE at the University of North Texas." The University of North Texas (UNT) serves over 32,000 undergraduate and 7,000 graduate students of which 50% of the undergraduate population and 20% of the graduate population are underrepresented minority (URM). UNT is ranked by the Carnegie Classification as a Tier 1 institute, is a Hispanic Serving Institute, and is dedicated to providing quality mentoring to a diverse group of Ph.D. students. The UNT G-­RISE mission is to provide a biomedical Ph.D. training program that is inclusive, culturally responsive, increases diversity, enhances scientific skill sets, develops trainee career and professional skill sets, provides opportunities to participants, and increases faculty development as a mentor.
Date: 2021-05-01/2022-04-30
Creator: Padilla, Pamela A.; Burggren, Warren W.; Cisneros, Gerardo Andrés & Hughes, Lee E.
Object Type: Text
System: The UNT Digital Library
Insertional mutagenesis of Brachypodium distachyon using the Tnt1 retrotransposable element (open access)

Insertional mutagenesis of Brachypodium distachyon using the Tnt1 retrotransposable element

Article is a study exploring the possibility of using the tobacco retrotransposon Tnt1 to create a transposon-based insertion mutant population in B. distachyon.
Date: May 15, 2020
Creator: Serrani-Yarce, Juan C.; Nandety, Raja Sekhar; Gill, Upinder S.; Oh, Sunhee; Lee, Hee-Kyung; Zhang, Xinji et al.
Object Type: Article
System: The UNT Digital Library
Integrating low-cost sensor monitoring, satellite mapping, and geospatial artificial intelligence for intra-urban air pollution predictions☆ (open access)

Integrating low-cost sensor monitoring, satellite mapping, and geospatial artificial intelligence for intra-urban air pollution predictions☆

Article describes how there is a growing need to apply geospatial artificial intelligence analysis to disparate environmental datasets to find solutions that benefit frontline communities. This research addresses these challenges by leveraging a strategically deployed, extensive low-cost sensor (LCS) network that was rigorously calibrated through an optimized neural network.
Date: May 18, 2023
Creator: Liang, Lu; Daniels, Jacob; Bailey, Colleen; Hu, Leiqiu; Phillips, Ronney & South, John
Object Type: Article
System: The UNT Digital Library
Loss of Migratory Traditions Makes the Endangered Patagonian Huemul Deer a Year-Round Refugee in Its Summer Habitat (open access)

Loss of Migratory Traditions Makes the Endangered Patagonian Huemul Deer a Year-Round Refugee in Its Summer Habitat

This article analyzes the historical spatiotemporal behavior of the huemul (Hippocamelus bisulcus), an endangered deer endemic to Patagonia. Losing migratory traditions is a major threat, and may explain their presently prevalent skeletal diseases, reduced longevity, and lacking recolonizations for most remaining huemul subpopulations.
Date: May 31, 2022
Creator: Flueck, Werner T.; Smith-Flueck, Jo Anne M.; Escobar, Miguel E.; Zuliani, Melina; Fuchs, Beat; Geist, Valerius et al.
Object Type: Article
System: The UNT Digital Library
Migratory movements of Atlantic puffins Fratercula arctica naumanni from high Arctic Greenland (open access)

Migratory movements of Atlantic puffins Fratercula arctica naumanni from high Arctic Greenland

This article is the first to present data on the migratory movements of the “large-billed” subspecies, F. a. naumanni, that breeds in the high Arctic and which has significantly larger body size than those farther south.
Date: May 28, 2021
Creator: Burnham, Kurt K.; Burnham, Jennifer L.; Johnson, Jeff A. & Huffman, Abby
Object Type: Article
System: The UNT Digital Library
On the standard L-function for GSp2n × GL1 and algebraicity of symmetric fourth L-values for GL2 (open access)

On the standard L-function for GSp2n × GL1 and algebraicity of symmetric fourth L-values for GL2

This article proves an explicit integral representation—involving the pullback of a suitable Siegel Eisenstein series—for the twisted standard L-function associated to a holomorphic vector-valued Siegel cusp form of degree n and arbitrary level.
Date: May 6, 2020
Creator: Pitale, Ameya; Saha, Abhishek & Schmidt, Ralf
Object Type: Article
System: The UNT Digital Library
Physiological Regulation of Growth, Hematology and Blood Gases in Chicken Embryos in Response to Low and High Incubation Humidity (open access)

Physiological Regulation of Growth, Hematology and Blood Gases in Chicken Embryos in Response to Low and High Incubation Humidity

Article examining effects of Low relative humidity (25–35%), and High relative humidity (85–93%) on hatchability, embryonic growth, hematology and blood gases and pH in chicken embryos.
Date: May 24, 2022
Creator: Branum, Sylvia R.; Tazawa, Hiroshi & Burggren, Warren W.
Object Type: Article
System: The UNT Digital Library
Role of quantum confinement and interlayer coupling in CrI3-graphene magnetic tunnel junctions (open access)

Role of quantum confinement and interlayer coupling in CrI3-graphene magnetic tunnel junctions

Article presents a combination of first principles and quantum ballistic transport calculations to shed important insights from an atomistic viewpoint on the underlying mechanisms governing spin transport in graphene/ CrI₃ junctions.
Date: May 29, 2020
Creator: Buongiorno Nardelli, Marco; Heath, Jonathan J.; Costa, Marcio & Kuroda, Marcelo A.
Object Type: Article
System: The UNT Digital Library