1,321 results match your criteria: "Bar-Ilan Institute of Nanotechnology & Advanced Materials[Affiliation]"

Comparative Review of the Conserved UL24 Protein Family in Herpesviruses.

Int J Mol Sci

October 2024

The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 5290002, Israel.

The UL24 protein family, conserved across all subfamilies of Orthoherpesviridae, plays diverse and significant roles in viral replication, host-virus interactions and pathogenesis. Understanding the molecular mechanisms and interactions of UL24 proteins is key to unraveling the complex interplay between herpesviruses and their hosts. This review provides a comparative and comprehensive overview of current knowledge on UL24 family members, including their conservation, expression patterns, cellular localization, and functional roles upon their expression and during viral infection, highlighting their significance in herpesvirus biology and their potential functions.

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  • The study explores a quantum walk on a ring using a directed triangle graph, monitoring the quantum walker until detection while implementing measurements on IBM quantum computers.
  • It verifies that the mean return time to a target state is quantized, showing sudden changes based on specific parameters, linking it to topological concepts.
  • The research finds that detection probabilities can vary based on initial states and measurement methods, demonstrating resilience to noise but also noting that limited measurements can alter theoretical predictions related to topological properties.
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  • Iron-sulfur (Fe-S) clusters are crucial for bacteria to respond to environmental changes and iron scarcity, with two primary biogenesis systems identified: ISC (housekeeping) and SUF (stress response).* -
  • Most bacteria possess only one of these systems, typically SUF, but the human pathogen under study has only ISC, which is essential for its survival and adaptation under various conditions.* -
  • This research highlights the different roles of ISC and SUF in bacterial fitness, revealing that bacteria with only ISC can better withstand oxidative stress and iron deprivation compared to those with only SUF.*
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The interface between chirality and crystallization and mechanisms by which chirality propagates from crystal structure to overall shapes of crystals are a key topic in crystallography and stereochemistry. Recently, nanocrystals attracted attention as useful model systems for this kind of studies. Specifically, tellurium nanocrystals have been used to address questions on relations between chirality of the crystal structure and that of the overall shape.

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Re-analysis of CLAP data affirms PRC2 as an RNA binding protein.

bioRxiv

September 2024

Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA; and Department of Genetics, Harvard Medical School, Boston, MA, USA.

Using halo-tagged PRC2 and "CLAP" methodology, Guo et al. recently came to the conclusion that PRC2 is not an RNA binding protein (RBP). They suggested that previous findings are CLIP artifacts and argue that RNA cannot play a direct role in PRC2 regulation.

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Latex-Bridged Inverse Pickering Emulsion for Durable Superhydrophobic Coatings with Dual Antibacterial Activity.

ACS Appl Mater Interfaces

October 2024

Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon LeZion 7505101, Israel.

There is agreement that every colloidal structure produces its own set of unique characteristics, properties, and applications. A colloidal phenomenon of latex-bridged water in a dimethyl carbonate (DMC) Pickering emulsion stabilized by R202 hydrophobic silica was investigated for its ability to act as a superhydrophobic coating (SHC) for cellulose substrates. First, various emulsion compositions were screened for their stability and droplet size.

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  • - KSHV is a cancer-causing virus linked to Kaposi's sarcoma and other rare blood cancers, and this study investigates the role of a specific protein, ORF20, in its lifecycle.
  • - Researchers created a virus that lacks the ORF20 gene (ORF20-Null KSHV) and found that this mutant virus resulted in faster viral gene expression but ultimately led to cell death and decreased viral production upon reactivation.
  • - The study highlights that reinstating the short form of ORF20 could restore viral production and reduce cell death, suggesting ORF20's role in enhancing viral reactivation and potential infectious particle production through its endonuclease function.
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Synthesis and Characterization of Porous Hydrophobic and Hydrophilic Silica Microcapsules for Applications in Agriculture.

Materials (Basel)

September 2024

Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.

Article Synopsis
  • Silica (SiO) particles are valued in industries for their durability and stability, and this study focuses on creating specialized porous microcapsules (MCs) from them.
  • The researchers developed hydrophobic and hydrophilic SiO MCs by layering SiO particles onto polystyrene microspheres and then removing the core, exploring how variations in size and quantity affect their properties.
  • The resulting microcapsules showed practical applications, successfully integrating into polymer films for mold prevention and effectively killing a harmful virus when filled with hydrogen peroxide.
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Gold nanorods with small dimensions demonstrate better cellular uptake and absorption efficiency. The ability to synthesize gold nanorods while maintaining a tunable high aspect ratio is challenging as it requires careful control of reaction conditions, often employing additional steps such as pH modification or the use of polymeric additives. We demonstrate a seedless approach for the synthesis of mini (width < 10 nm) gold nanorods with tunable longitudinal surface plasmon resonance from ∼700 nm to >1000 nm and aspect ratios ranging from ∼3 to ∼7 without the use of any polymeric additives or pH modification.

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CHARMM at 45: Enhancements in Accessibility, Functionality, and Speed.

J Phys Chem B

October 2024

Harvard University, Department of Chemistry and Chemical Biology, Cambridge, Massachusetts 02138, United States.

Since its inception nearly a half century ago, CHARMM has been playing a central role in computational biochemistry and biophysics. Commensurate with the developments in experimental research and advances in computer hardware, the range of methods and applicability of CHARMM have also grown. This review summarizes major developments that occurred after 2009 when the last review of CHARMM was published.

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Analysis of CaSrCO phases generated by competitive Sr replacement in pre-formed aragonite.

Heliyon

September 2024

Department of Chemistry and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel.

The ratio of Sr/Ca ions in marine biogenic minerals is considered advantageous for tracking geochemical and biomineralization processes that occur in the oceans. It is debatable, though, whether the ratio in biominerals such as coral skeleton is simply related to values in the seawater environment or controlled by the organism. Recent data show that coral larvae produce partially disordered immature aragonite in Mg-containing Sr-poor calcifying fluids, which transforms into well-ordered aragonite in Mg-depleted Sr-enriched environments, upon animal metamorphosis into the sessile polyp state.

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Adhesion of retinal cells to gold surfaces by biomimetic molecules.

Front Cell Dev Biol

August 2024

School of Optometry and Visual Science, Faculty of Life Sciences, Bar Ilan University, Ramat Gan, Israel.

Background: Neural cell-electrode coupling is crucial for effective neural and retinal prostheses. Enhancing this coupling can be achieved through surface modification and geometrical design to increase neuron-electrode proximity. In the current research, we focused on designing and studying various biomolecules as a method to elicit neural cell-electrode adhesion via cell-specific integrin mechanisms.

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Article Synopsis
  • * The study examined how different synthesis methods, specifically covalent binding versus physical adsorption, influence the properties and effectiveness of antibody-coated GNPs.
  • * Results showed that covalently binding antibodies to GNPs enhances their ability to kill cancer cells, especially when using higher antibody mass and specific linker ratios.
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Extracting Superficial Scattering by Q-Sensing Technique.

J Biophotonics

September 2024

The Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan, Israel.

Optical properties determine how light interacts with biological tissues. The current methods for measuring these optical properties are influenced by both deep and superficial skin layers. Polarization-based methods have been proposed in order to determine the influence of deep layer scattering.

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Tracking Disordered Extracellular Domains of Membrane Proteins in the Cell with Cu(II)-Based Spin Labels.

J Phys Chem B

September 2024

The Department of Chemistry and the Institute of Nanotechnology and Advanced Materials, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan 529002, Israel.

electron paramagnetic resonance (EPR) spectroscopy experiments provide high-resolution data about conformational changes of proteins within the cell. However, one of the limitations of EPR is the requisite of stable paramagnetic centers in a reducing environment. We recently showed that histidine-rich sites in proteins hold a high affinity to Cu(II) ions complexed with a chelator.

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A-to-I RNA editing is a cellular mechanism that generates transcriptomic and proteomic diversity, which is essential for neuronal and immune functions. It involves the conversion of specific adenosines in RNA molecules to inosines, which are recognized as guanosines by cellular machinery. Despite the vast number of editing sites observed across the animal kingdom, pinpointing critical sites and understanding their in vivo functions remains challenging.

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Significance: A better understanding of diffusion reflection (DR) behavior may allow it to be used for more noninvasive applications, including the development of non-damaging techniques, especially for medical topical diagnosis and treatments.

Aim: For a bilayer opaque substance where the attenuation of the upper layer is larger than the attenuation of the lower layer, the DR crossover point ( ) is location where the photons coming from the bottom layer start affecting the DR. We aim to study the dependency of the on absorption changes in different layers for constant scattering and top layer thickness.

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Quantum materials have a fascinating tendency to manifest novel and unexpected electronic states upon proper manipulation. Ideally, such manipulation should induce strong and irreversible changes and lead to new relevant length scales. Plastic deformation introduces large numbers of dislocations into a material, which can organize into extended structures and give rise to qualitatively new physics as a result of the huge localized strains.

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Due to quasi-one-dimensional confinement, nanowires possess unique electronic properties, which can promote specific device architectures. However, nanowire growth presents paramount challenges, limiting the accessible crystal structures and elemental compositions. Here we demonstrate solid-state topotactic exchange that converts wurtzite InAs nanowires into Zintl EuInAs.

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Surface Plasmon Resonance Modulation by Complexation of Platinum on the Surface of Silver Nanocubes.

ACS Omega

August 2024

Department of Chemistry and Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan 5290002, Israel.

The use of plasmonic particles, specifically, localized surface plasmonic resonance (LSPR), may lead to a significant improvement in the electrical, electrochemical, and optical properties of materials. Chemical modification of the dielectric constant near the plasmonic surface should lead to a shift of the optical resonance and, therefore, the basis for color tuning and sensing. In this research, we investigated the variation of the LSPR by modifying the chemical environment of Ag nanoparticles (NPs) through the complexation of Pt(IV) metal cations near the plasmonic surface.

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Acoustically shaped DNA-programmable materials.

Nat Commun

August 2024

Department of Chemical Engineering, Columbia University, New York, NY, USA.

Recent advances in DNA nanotechnology allow for the assembly of nanocomponents with nanoscale precision, leading to the emergence of DNA-based material fabrication approaches. Yet, transferring these nano- and micron-scale structural arrangements to the macroscale morphologies remains a challenge, which limits the development of materials and devices based on DNA nanotechnology. Here, we demonstrate a materials fabrication approach that combines DNA-programmable assembly with actively driven processes controlled by acoustic fields.

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Intrinsically disordered proteins and regions (IDP/IDRs) are ubiquitous across all domains of life. Characterized by a lack of a stable tertiary structure, IDP/IDRs populate a diverse set of transiently formed structural states that can promiscuously adapt upon binding with specific interaction partners and/or certain alterations in environmental conditions. This malleability is foundational for their role as tunable interaction hubs in core cellular processes such as signaling, transcription, and translation.

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Revisiting the Charging Mechanism of α-MnO in Mildly Acidic Aqueous Zinc Electrolytes.

Small

November 2024

Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China.

Article Synopsis
  • Recent debates focus on the charging mechanism of MnO cathodes in Zn electrolytes, exploring charge carriers, electrochemical processes, and the impact of zinc hydroxy films.
  • A detailed analysis using techniques like EQCM-D, NMR, and XRD reveals that the charging process primarily involves HO ion insertion, while Zn intercalation is not observed.
  • The study emphasizes the role of Mn additives in generating protons through MnOOH formation, ultimately contributing to the stability and performance of Zn/α-MnO batteries.
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Off-target effects present a significant impediment to the safe and efficient use of CRISPR-Cas genome editing. Since off-target activity is influenced by the genomic sequence, the presence of sequence variants leads to varying on- and off-target profiles among different alleles or individuals. However, a reliable tool that quantifies genome editing activity in an allelic context is not available.

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This study conducts a comparative analysis, using non-equilibrium Green's functions (NEGF), of two state-of-the-art two-well (TW) Terahertz Quantum Cascade Lasers (THz QCLs) supporting clean 3-level systems. The devices have nearly identical parameters and the NEGF calculations with an abrupt-interface roughness height of 0.12 nm predict a maximum operating temperature (T) of ~ 250 K for both devices.

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