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  • Single-cell stochastic modelling of the action of antimicrobial peptides on bacteria 

    Teimouri,Hamid; Nguyen, Thao N.; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2021)
    Antimicrobial peptides (AMPs) produced by multi-cellular organisms as their immune system's defence against microbes are actively considered as natural alternatives to conventional antibiotics. Although substantial progress has been achieved in studying the AMPs, the microscopic mechanisms of their functioning remain not well understood. Here, we ...
  • Membrane Materials for Selective Ion Separations at the Water–Energy Nexus 

    DuChanois, Ryan M.; Porter, Cassandra J.; Violet, Camille; Verduzco, Rafael; Elimelech, Menachem; (2021)
    Synthetic polymer membranes are enabling components in key technologies at the water–energy nexus, including desalination and energy conversion, because of their high water/salt selectivity or ionic conductivity. However, many applications at the water–energy nexus require ion selectivity, or separation of specific ionic species from other similar ...
  • Patterning, Transfer, and Tensile Testing of Covalent Organic Framework Films with Nanoscale Thickness 

    Zhu, Dongyang; Hu, Zhiqi; Rogers, Tanya K.; Barnes, Morgan; Tseng, Chia-Ping; (2021)
    Covalent organic frameworks (COFs) are promising materials for a variety of applications, including membrane-based separations, thin-film electronics, and as separators for electrochemical devices. Robust mechanical properties are critical to these applications, but there are no reliable methods for patterning COFs or producing free-standing thin ...
  • Macroscopic weavable fibers of carbon nanotubes with giant thermoelectric power factor 

    Komatsu, Natsumi; Ichinose, Yota; Dewey, Oliver S.; Taylor, Lauren W.; Trafford, Mitchell A.; (2021)
    Low-dimensional materials have recently attracted much interest as thermoelectric materials because of their charge carrier confinement leading to thermoelectric performance enhancement. Carbon nanotubes are promising candidates because of their one-dimensionality in addition to their unique advantages such as flexibility and light weight. However, ...
  • SIBaR: a new method for background quantification and removal from mobile air pollution measurements 

    Actkinson, Blake; Ensor, Katherine; Griffin, Robert J. (2021)
    Mobile monitoring is becoming increasingly popular for characterizing air pollution on fine spatial scales. In identifying local source contributions to measured pollutant concentrations, the detection and quantification of background are key steps in many mobile monitoring studies, but the methodology to do so requires further development to improve ...
  • Extreme Rate Capability Cycling of Porous Silicon Composite Anodes for Lithium-Ion Batteries 

    Dhanabalan, Abirami; Song, Botao Farren; Biswal, Sibani Lisa (2021)
    Silicon-based anodes have the potential to increase the capacity of lithium-ion batteries but suffer from irreversible damage due to their volume expansion. Capacity-controlled cycling has emerged as a promising method for silicon-based anodes; however, few studies have evaluated how high C-rates affect cycle life under capacity-controlled cycling. ...
  • Metal Oxide Catalysts for the Synthesis of Covalent Organic Frameworks and One-Step Preparation of Covalent Organic Framework-Based Composites 

    Zhu, Yifan; Zhu, Dongyang; Yan, Qianqian; Gao, Guanhui; Xu, Jianan; (2021)
    The integration of covalent organic frameworks (COFs) with inorganic materials provides opportunities to develop a new class of composite materials with high surface areas and novel functionalities relevant to photocatalysis, chemical adsorption, and magnetic resonance imaging. However, current methods for the preparation of COF-based composites ...
  • Utilizing the broad electromagnetic spectrum and unique nanoscale properties for chemical-free water treatment 

    Westerhoff, Paul; Alvarez, Pedro J.J.; Kim, Jaehong; Li, Qilin; Alabastri, Alessandro; (2021)
    Clean water is critical for drinking, industrial processes, and aquatic organisms. Existing water treatment and infrastructure are chemically intensive and based on nearly century-old technologies that fail to meet modern large and decentralized communities. The next-generation of water processes can transition from outdated technologies by utilizing ...
  • Temporal order of mutations influences cancer initiation dynamics 

    Teimouri, Hamid; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2021)
    Cancer is a set of genetic diseases that are driven by mutations. It was recently discovered that the temporal order of genetic mutations affects the cancer evolution and even the nature of the decease itself. The mechanistic origin of these observations, however, remain not well understood. Here we present a theoretical model for cancer initiation ...
  • Urban core-downwind differences and relationships related to ozone production in a major urban area in Texas 

    Guo, Fangzhou; Bui, Alexander A.T.; Schulze, Benjamin C.; Yoon, Subin; Shrestha, Sujan; (2021)
    San Antonio, the second-most populous city in Texas and the seventh-most populous city in the United States (US), has been designated a marginal non-attainment area by the US Environmental Protection Agency with respect to the 2015 ozone (O3) National Ambient Air Quality Standard. While stationary air quality monitoring sites are operated in the ...
  • Evaluation of Asphaltene Remediation Using Microemulsion Formulations in a Porous Media Microfluidic Device 

    Zhang, Zhuqing; Perrard, Alyssa; Trabelsi, Siwar; Biswal, Sibani Lisa (2021)
    This article presents a comparison of the efficiency of d-limonene to other solvent-based microemulsions (MEs) for the removal of asphaltene deposits using a dual-permeability porous media microfluidic device. The dynamics of removal of the deposited asphaltenes were analyzed using optical microscopy and in situ pressure-drop measurements. All MEs ...
  • Highly active and selective oxygen reduction to H2O2 on boron-doped carbon for high production rates 

    Xia, Yang; Zhao, Xunhua; Xia, Chuan; Wu, Zhen-Yu; Zhu, Peng; (2021)
    Oxygen reduction reaction towards hydrogen peroxide (H2O2) provides a green alternative route for H2O2 production, but it lacks efficient catalysts to achieve high selectivity and activity simultaneously under industrial-relevant production rates. Here we report a boron-doped carbon (B-C) catalyst which can overcome this activity-selectivity dilemma. ...
  • Rapid, Ambient Temperature Synthesis of Imine Covalent Organic Frameworks Catalyzed by Transition-Metal Nitrates 

    Zhu, Dongyang; Zhang, Zhuqing; Alemany, Lawrence B.; Li, Yilin; Nnorom, Njideka; (2021)
    Covalent organic frameworks (COFs) are crystalline, porous organic materials that are promising for applications including catalysis, energy storage, electronics, gas storage, water treatment, and drug delivery. Conventional solvothermal synthesis approaches require elevated temperatures, inert environments, and long reaction times. Herein, we show ...
  • Electrochemical ammonia synthesis via nitrate reduction on Fe single atom catalyst 

    Wu, Zhen-Yu; Karamad, Mohammadreza; Yong, Xue; Huang, Qizheng; Cullen, David A.; (2021)
    Electrochemically converting nitrate, a widespread water pollutant, back to valuable ammonia is a green and delocalized route for ammonia synthesis, and can be an appealing and supplementary alternative to the Haber-Bosch process. However, as there are other nitrate reduction pathways present, selectively guiding the reaction pathway towards ammonia ...
  • Long-Range Supercoiling-Mediated RNA Polymerase Cooperation in Transcription 

    Klindziuk, Alena; Kolomeisky, Anatoly B.; Center for Theoretical Biological Physics (2021)
    It is widely believed that DNA supercoiling plays an important role in the regulation of transcriptional dynamics. Recent studies show that it could affect transcription not only through the buildup and relaxation of torsional strain on DNA strands but also via effective long-range supercoiling-mediated interactions between RNA polymerase (RNAP) ...
  • Single-Particle Hyperspectral Imaging Reveals Kinetics of Silver Ion Leaching from Alloy Nanoparticles 

    Al-Zubeidi, Alexander; Stein, Frederic; Flatebo, Charlotte; Rehbock, Christoph; Hosseini Jebeli, Seyyed Ali; (2021)
    Gold–silver alloy nanoparticles are interesting for multiple applications, including heterogeneous catalysis, optical sensing, and antimicrobial properties. The inert element gold acts as a stabilizer for silver to prevent particle corrosion, or conversely, to control the release kinetics of antimicrobial silver ions for long-term efficiency at minimum ...
  • A platform for post-translational spatiotemporal control of cellular proteins 

    Jayanthi, Brianna; Bachhav, Bhagyashree; Wan, Zengyi; Martinez Legaspi, Santiago; Segatori, Laura; (2021)
    Mammalian cells process information through coordinated spatiotemporal regulation of proteins. Engineering cellular networks thus relies on efficient tools for regulating protein levels in specific subcellular compartments. To address the need to manipulate the extent and dynamics of protein localization, we developed a platform technology for the ...
  • Distinguishing the Effect of Rock Wettability from Residual Oil on Foam Generation and Propagation in Porous Media 

    Amirmoshiri, Mohammadreza; Wang, Xinglin; Bai, Chutian; Tewari, Raj Deo; Xie, Sheena Xina; (2021)
    One of the common challenges of applying foam for enhanced oil recovery is the foam instability in the presence of crude oil and nonwater-wet surfaces. In this experimental study, we systematically distinguish the effect of rock surface wettability from that of crude oil saturation on foam rheology under reservoir conditions. Neutral-wet Berea and ...
  • High‐performance hybrid luminescent‐scattering solar concentrators based on a luminescent conjugated polymer 

    Li, Yilin; Sun, Yujian; Zhang, Yongcao; Li, Yuxin; Verduzco, Rafael (2021)
    Luminescent solar concentrators (LSCs) are considered a promising building‐integrated photovoltaic technology. Over the past decade, numerous luminophores have been developed for LSCs. However, conjugated polymers are rarely reported for LSCs despite their wide application in other fields. In this study, we investigated a luminescent conjugated ...
  • Side‐Chain Engineering for High‐Performance Conjugated Polymer Batteries 

    Li, Xiaoyi; Li, Yilin; Sarang, Kasturi; Lutkenhaus, Jodie; Verduzco, Rafael (2021)
    Conjugated polymers are attractive for energy storage but typically require significant amounts of conductive additives to successfully operate with thin electrodes. Here, side‐chain engineering is used to improve the electrochemical performance of conjugated polymer electrodes. Naphthalene dicarboximide (NDI)‐based conjugated polymers with ion‐conducting ...

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