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Optical Pump Terahertz Probe (OPTP) and Time Resolved Terahertz Spectroscopy (TRTS) of emerging solar materials Editor’s Pick
Article describes how photoconductivity is the crucial benchmark to assess the potential of any emerging material for future solar applications. This tutorial aims to familiarize the reader with the main THz techniques used to explore emerging materials.
Date:
July 19, 2023
Creator:
Neu, Jens
Object Type:
Article
System:
The UNT Digital Library
An unconventional proanthocyanidin pathway in maize
Article describes that proanthocyanidins (PAs), flavonoid polymers involved in plant defense, are also beneficial to human health and ruminant nutrition. The authors explore whether there is a functional PA biosynthesis pathway in maize using a combination of analytical chemistry and genetic approaches.
Date:
July 19, 2023
Creator:
Lu, Nan; Jun, Ji Hyung; Li, Ying & Dixon, R. A.
Object Type:
Article
System:
The UNT Digital Library
Manipulating microRNA miR408 enhances both biomass yield and saccharification efficiency in poplar
Article describes how the conversion of lignocellulosic feedstocks to fermentable sugar for biofuel production is inefficient, and most strategies to enhance efficiency directly target lignin biosynthesis, with associated negative growth impacts. The authors demonstrate, for both laboratory-and field-grown plants, that expression of Pag-miR408 in poplar significantly enhances saccharification, with no requirement for acid-pretreatment, while promoting plant growth.
Date:
July 18, 2023
Creator:
Guo, Yayu; Wang, Shufang; Yu, Keji; Wang, Hou-Ling; Xu, Huimin; Song, Chengwei et al.
Object Type:
Article
System:
The UNT Digital Library
Complexity synchronization: a measure of interaction between the brain, heart and lungs
Authors of the article address the measurable consequences of the network effect (NE) on time series generated by different parts of the brain, heart, and lung organ-networks (ONs), which are directly related to their inter-network and intra-network interactions. The authors assert that these same physiologic ONs have been shown to generate crucial event (CE) time series, and herein are shown ,using modified diffusion entropy analysis (MDEA) to have scaling indices with quasiperiodic changes in complexity, as measured by scaling indices, over time.
Date:
July 15, 2023
Creator:
Mahmoodi, Korosh; Kerick, Scott E.; Grigolini, Paolo; Franaszczuk, Piotr J. & West, Bruce J.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of the Vibration Signal during Milling Vertical Thin-Walled Structures from Aerospace Materials
Article describes how the main functions of thin-walled structures are to reduce the weight of the finished product and to increase the rigidity of the structure. The authors compared the vibration signal for different approaches to machining thin walled-components with vertical walls made of Ti6AI4V titanium alloy and Inconel 625 nickel alloy.
Date:
July 14, 2023
Creator:
Kurpiel, Szymon; Zagrórski, Krzysztof; Skryzpkowski, Krzysztof & Brostow, Witold, 1934-
Object Type:
Article
System:
The UNT Digital Library
Bioinspired Synthesis of Silver Nanoparticles for the Remediation of Toxic Pollutants and Enhanced Antibacterial Activity
Article asserts that this research presents a novel and environmentally friendly approach for the synthesis of multifunctional nanobiocomposites for the efficient removal of toxic heavy metal and dye, as well as the disinfection of wastewater microorganisms. The synthesized bioinspired nanocomposite KAC-CS-AgNPs could be an innovative solution for effective and sustainable wastewater treatment and has great potential for commercial applications.
Date:
June 29, 2023
Creator:
Mandal, Sujata; Hwang, Sangchul; Marpu, Sreekar B.; Omary, Mohammad A.; Prybutok, Victor R. & Shi, Sheldon
Object Type:
Article
System:
The UNT Digital Library
Guanidinium-based covalent organic framework membrane for single-acid recovery
Article discusses how, although acids are extensively used in contemporary industries, time-consuming and environmentally unfriendly processes hinder single-acid recovery from wastes containing various iconic species. The authors rationally designed a membrane with uniform angstrom-sized pore channels and built-in charge-assisted hydrogen bond donors that preferentially conducted HCl while exhibiting negligible conductance for other compounds.
Date:
June 21, 2023
Creator:
Meng, Qing-Wei; Wu, Shaochun; Liu, Mingjie; Guo, Qing; Xian, Weipeng; Zuo, Xiuhui et al.
Object Type:
Article
System:
The UNT Digital Library
Survival rates in the world's southernmost forest bird community
Article asserts that the Magellanic sub-Antarctic Forest is home to the world's southernmost avian community and is the only Southern Hemisphere analogue to Northern Hemisphere temperate forests at this latitude. Authors describe annual survival patterns and their association with climate variables using a 20-year mark–recapture data set of five forest bird species in the Cape Horn Biosphere Reserve.
Date:
June 20, 2023
Creator:
Sandvig, Erik M.; Quilodrán, Claudio S.; Altamirano, Tomás A.; Aguirre, Francisco; Barroso, Omar; Rivero de Aguilar, Juan et al.
Object Type:
Article
System:
The UNT Digital Library
Metabolic and transcriptomic study of pennycress natural variation identifies targets for oil improvement
Article describes how, although pennycress, a winter annual, could be grown as a dedicated bioenergy crop, an increase in its seed oil content is required to improve its economic competitiveness. In this work, the authors combined biomass composition with metabolomic and transcriptomic studies of developing embryos from 22 pennycress natural variants to identify targets for oil improvement.
Date:
June 19, 2023
Creator:
Arias, Cintia Lucía; García Navarrete, Leidy Tatiana; Mukundi, Eric; Swanson, Tyler; Yang, Fan; Hernandez, Jonathan et al.
Object Type:
Article
System:
The UNT Digital Library
Code Comparison in Galaxy-scale Simulations with Resolved Supernova Feedback: Lagrangian versus Eulerian Methods
Authors of the article present a suite of high-resolution simulations of an isolated dwarf galaxy using four different hydrodynamical codes: Gizmo, Arepo, Gadget, and Ramses. They find reasonable agreement on the time-averaged star formation rates as well as the joint density–temperature distributions between all codes.
Date:
June 16, 2023
Creator:
Hu, Chia-Yu; Smith, Matthew C.; Teyssier, Romain; Bryan, Greg L.; Verbeke, Robbert; Emerick, Andrew et al.
Object Type:
Article
System:
The UNT Digital Library
Gemini Near Infrared Spectrograph–Distant Quasar Survey: Augmented Spectroscopic Catalog and a Prescription for Correcting UV-based Quasar Redshifts
Article describes how quasars at z ≳ 1 most often have redshifts measured from rest-frame ultraviolet emission lines. One of the most common such lines, C ivλ1549, shows blueshifts up to ≈5000 km s−1 and in rare cases even higher. The authors present spectroscopic measurements for 260 sources at 1.55 ≲ z ≲ 3.50 having −28.0 ≲ Mi ≲ − 30.0 mag from the Gemini Near Infrared Spectrograph–Distant Quasar Survey (GNIRS-DQS) catalog, augmenting the previous iteration, which contained 226 of the 260 sources whose measurements are improved upon in this work.
Date:
June 13, 2023
Creator:
Matthews, Brandon M.; Dix, Cooper; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D.; Andruchow, I. et al.
Object Type:
Article
System:
The UNT Digital Library
Gemini Near Infrared Spectrograph–Distant Quasar Survey: Prescriptions for Calibrating UV-based Estimates of Supermassive Black Hole Masses in High-redshift Quasars
Article describes how the most reliable single-epoch supermassive black hole mass (MBH) estimates in quasars are obtained by using the velocity widths of low-ionization emission lines, typically the Hβλ4861 line. The authors find that utilizing both emission lines, where available, reduces the scatter of UV-based MBH estimates by ∼15% when compared to previous studies.
Date:
June 13, 2023
Creator:
Dix, Cooper; Matthews, Brandon; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D.; Andruchow, I. et al.
Object Type:
Article
System:
The UNT Digital Library
Systematic approaches to C-lignin engineering in Medicago truncatula
Article describes how C-lignin is a homopolymer of caffeyl alcohol present in the seed coats of a variety of plant species including vanilla orchid, various cacti, and the ornamental plant Cleome hassleriana. The authors used information from a transcriptomic analysis of developing C. hassleriana seed coats to suggest strategies for engineering C-lignin in a heterologous system, using hairy roots of the model legume Medicago truncatula.
Date:
June 12, 2023
Creator:
Ha, Chan Man; Escamilla-Treviño, Luis; Zhuo, Chunliu; Pu, Yunqiao; Bryant, Nathan; Ragauskas, Arthur J. (Arthur Jonas), 1957- et al.
Object Type:
Article
System:
The UNT Digital Library
Holographic Fabrication of 3D Moiré Photonic Crystals Using Circularly Polarized Laser Beams and a Spatial Light Modulator
The authors of the article state that holographic fabrication of a 3D moiré photonic crystal is very difficult due to the coexistence of the bright and dark regions, where the exposure threshold is suitable for one region but not for the other. In this paper, the authors study the holographic fabrication of 3D moiré photonic crystals using an integrated system of a single reflective optical element (ROE) and a spatial light modulator (SLM) where nine beams (four inner beams + four outer beams + central beam) are overlapped.
Date:
June 9, 2023
Creator:
Hurley, Noah; Kamau, Steve; Cui, Jingbiao & Lin, Yuankun
Object Type:
Article
System:
The UNT Digital Library
Experimental and Modeling Study of Water Time Histories during H2S-N2O Combustion in a Shock Tube
Article describes how, in the present study, the water formation was followed by laser absorption with N2O as an oxidant, instead of O2. Three H2S/N2O mixtures diluted in 98% Ar were studied to cover the following range of equivalence ratios: 0.5, 1.0, and 2.0, over a wide range of temperatures (1580–1940 K) around atmospheric pressure.
Date:
June 7, 2023
Creator:
Cooper, Sean P.; Marshall, Paul; Mathieu, Olivier; Pinzón, Laura T.; Mulvihill, Clayton R. & Glarborg, Peter
Object Type:
Article
System:
The UNT Digital Library
Fractal structure of human and primate social networks optimizes information flow
Article describes how primate and human social groups exhibit a fractal structure that has a very limited range of preferred layer sizes. The authors calculate the size dependence of the scaling properties of complex social network models and argue that this aggregate behavior exhibits a form of collective intelligence.
Date:
June 7, 2023
Creator:
West, Bruce J.; Culbreth, Garland; Dunbar, Robin I. M. & Grigolini, Paolo
Object Type:
Article
System:
The UNT Digital Library
Reactions of hydrazine with the amidogen radical and atomic hydrogen
Article describes how the rate coefficient k1 for NH2 + N2H4 was measured to be (5.4 ± 0.4) × 10−14 cm3 molecule−1 s−1 at 296 K. The authors then describe how a combination of experiment and theory leads to a recommended rate coefficient for hydrogen abstraction of k1 = 6.3 × 10−23 T3.44 exp(+289 K/T) cm3 molecule−1 s−1.
Date:
June 7, 2023
Creator:
Gao, Yide; Alecu, I. M.; Hashemi, Hamid; Glarborg, Peter & Marshall, Paul
Object Type:
Article
System:
The UNT Digital Library
Histological features of non-alcoholic fatty liver disease revealed in response to mixed vehicle emission exposure and consumption of a high-fat diet in wildtype C57Bl/6 male mice
Article describes how non-alcoholic fatty liver disease (NAFLD) is currently plaguing the population at pandemic proportions and is expected to become more prevalent over the next decade. The authors investigated the hypothesis that exposure to a mixture of gasoline and diesel engine emissions (MVE), coupled with the concurrent consumption of a HF diet, promotes the development of a NAFLD phenotype within the liver.
Date:
June 6, 2023
Creator:
Schneider, Leah J.; Santiago, Isabella; Johnson, Bailee; Stanley, Analana Hays; Penaredondo, Bea & Lund, Amie K.
Object Type:
Article
System:
The UNT Digital Library
Evolution of microstructure and mechanical properties in gas tungsten arc welded dual-phase Fe50Mn30Co10Cr10 high entropy alloy
Article describes how in recent years, high entropy alloys (HEAs) have been shown to be promising alternatives to common engineering alloys, depending on their composition and thermomechanical processing. In the present work, Gas Tungsten Arc Welding (GTAW) was used to achieve defect-free joints based on a novel transformation induced plasticity (TRIP) Fe50Mn30Co10Cr10 HEA.
Date:
June 3, 2023
Creator:
Lopes, J. G.; Agrawal, Priyanka; Shen, Jiajia; Schell, N.; Mishra, R. S. & Oliveira, J. P.
Object Type:
Article
System:
The UNT Digital Library
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
Sibling Aggression, Feeding Rates, and Hatch Rank of Nestling Red-Shouldered Hawks (Buteo lineatus)
Article describes how, in many raptor species, hatching asynchrony results in a size hierarchy among nestlings, which may facilitate brood reduction by means of sibling aggression-induced mortality, especially in times of low food resources. The authors studied the influence of hatch rank, brood size, and brood age on aggression and feeding rates among Red-shouldered Hawk (Buteo lineatus) nestlings in suburban southwestern Ohio.
Date:
May 25, 2023
Creator:
Miller, Sara J.; Dykstra, Cheryl R.; Rolland, Virginie; Simon, Melinda M.; Hays, Jeffrey L. & Bednarz, James C.
Object Type:
Article
System:
The UNT Digital Library
Temporal complexity measure of reaction time series: Operational versus event time
Article describes how detrended fluctuation analysis (DFA) is a well-established method to evaluate scaling indices of time series, which categorize the dynamics of complex systems. The authors propose treating each reaction time as a duration time that changes the representation from operational (trial number) time n to event (temporal) time t, or X(t).
Date:
May 23, 2023
Creator:
Mahmoodi, Korosh; Kerick, Scott E.; Grigolini, Paolo; Franaszczuk, Pitor J. & West, Bruce J.
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☆
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
X-Ray Unveiling Events in a z ≈ 1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
Authors of the article explain that they investigated the extreme X-ray variability of a z = 1.608 active galactic nucleus in the 7 Ms Chandra Deep Field-South (XID 403), which showed two significant X-ray brightening events.
Date:
May 18, 2023
Creator:
Yu, Li-Ming; Luo, Bin; Brandt, William Nielsen; Bauer, Franz E.; De Cicco, D.; Fabian, Andrew C. et al.
Object Type:
Article
System:
The UNT Digital Library