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  1. 25 Feb 2023 Journal Article Boundary-Layer Meteorology

    Flow and Turbulence Statistics of a Two-Height Canopy Model in a Wind Tunnel

    Lior Shig, Valery Babin, Ron Shnapp, Eyal Fattal, Alex Liberzon, Yardena Bohbot-Raviv
    Abstract

    Modelling the flow and mass transport in canopies requires knowledge of how roughness heterogeneity impacts them. We present wind-tunnel experiments that enable quantifying the (time-space) average flow statistics of a two-height model canopy. We use two-dimensional particle image velocimetry measurements of the flow in multiple planes inside the canopy layer (CL), the

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  2. 17 Feb 2023 Journal Article iScience

    Monkeypox infection elicits strong antibody and B cell response against A35R and H3L antigens

    Ron Yefet, Nadav Friedel, Hadas Tamir, Ksenia Polonsky, Michael Mor, Lilach Cherry, Eyal Taleb, David Hagin, Eli Sprecher, Tomer Israely, Natalia T Freund
    Abstract

    Monkeypox virus (MPXV) resides in two forms; mature and enveloped, and depending on it, distinct proteins are displayed on the viral surface. Here, we expressed two MPXV antigens from the mature, and one from the enveloped form, and tested their reactivity to sera of 11 MPXV recoverees while comparing to sera from recently and past vaccinated individuals. 8 out of 11

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  3. 17 Feb 2023 Journal Article Sensors

    Non-Contact, Continuous Sampling of Porous Surfaces for the Detection of Particulate and Adsorbed Organic Contaminations by Low-Temperature Plasma Coupled to Ion Mobility Spectrometer

    Izhar Ron, Hagai Sharabi, Amalia Zaltsman, Amir Leibman, Mordi Hotoveli, Alexander Pevzner, Shai Kendler
    Abstract

    Chemical analysis of hazardous surface contaminations, such as hazardous substances, explosives or illicit drugs, is an essential task in security, environmental and safety applications. This task is mostly based on the collection of particles with swabs, followed by thermal desorption into a vapor analyzer, usually a detector based on ion mobility spectrometry (IMS)

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  4. 16 Feb 2023 Journal Article PloS One

    Alternate atxA and acpA dependent response of Bacillus anthracis to serum, HCO3- and CO2

    Itai Glinert, Elad Bar-David, Amir Ben-Shmuel, Assa Sittner, Reut Puni
    Abstract

    Bacillus anthracis overcomes host immune responses by producing capsule and secreting toxins. Production of these virulence factors in response to entering the host environment was shown to be regulated by atxA, the major virulence regulator, known to be activated by HCO3- and CO2. While toxin production is regulated directly by atxA, capsule production is independently

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  5. 10 Feb 2023 Preprint OSF Preprints

    An Industrial Internet of Things (IIOT) open architecture for information and decision support systems in field campaigns

    Yehuda Arav, Ziv Klausner, Hadas David-Saroussi, Gadi Eidelheit, Eyal Fattal
    Abstract

    Information and decision support systems are essential to conducting field campaigns in the atmospheric sciences. However, their development is costly and time-consuming since each field campaign has its own research goals, which result in using an assortment of sensors and various analysis procedures. To reduce development costs, we present a software framework based

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  6. 7 Feb 2023 Journal Article Toxicology Reports

    The use of aflibercept (VEGF trap) in mitigating sulfur mustard-induced corneal neovascularization in a rabbit model

    Ariel Gore, Tamar Kadar, Maayan Cohen, Hila Gutman, Rellie Gez, Shlomit Dachir, Vered Horwitz
    Abstract

    Sulfur mustard (SM)-induced ocular injury is characterized by an acute inflammatory response that may become chronic or enter a latent phase with delayed pathology. This study aimed to evaluate the efficacy of ziv-aflibercept and aflibercept in preventing and ameliorating corneal neovascularization (NV), respectively, following chemical eye exposure to SM vapor in a

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  7. 25 Jan 2023 Journal Article iScience

    A reversible mutation in a genomic hotspot saves bacterial swarms from extinction

    Idan Hefetz, Ofir Israeli, Gal Bilinsky, Inbar Plaschkes, Einat Hazkani-Covo, Zvi Hayouka, Adam Lampert, Yael Helman
    Abstract

    Microbial adaptation to changing environmental conditions is frequently mediated by hypermutable sequences. Here we show that such a hypermutable hotspot within a gene encoding a flagellar unit of Paenibacillus glucanolyticus, generated spontaneous non-swarming mutants with increased stress resistance. These mutants, which survived conditions that eliminated wild-type

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  8. 23 Jan 2023 Journal Article Analytical Chemistry

    Integrating Effect-Directed Analysis and Chemically Indicative Mass Spectral Fragmentation to Screen for Toxic Organophosphorus Compounds

    Dan Loewenthal, Shai Dagan, Eyal Drug
    Abstract

    Analytical chemists are often challenged to screen for bioactive compounds in complex matrices, sometimes without a priori knowledge of the exact compound of interest. Therefore, “flagging” techniques, highlighting common characteristics of bioactive compounds, are highly sought after. In this work, we demonstrate a double flagging method, where unknown organophosphorus

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  9. 17 Jan 2023 Journal Article Analytical Chemistry

    PICA: Pixel Intensity Correlation Analysis for Deconvolution and Metabolite Identification in Mass Spectrometry Imaging

    Yonghui Dong, Nir Shachaf, Liron Feldberg, Ilana Rogachev, Uwe Heinig, Asaph Aharoni
    Abstract

    In-source fragmentation (ISF) is a naturally occurring phenomenon in various ion sources including soft ionization techniques such as matrix-assisted laser desorption/ionization (MALDI). It has traditionally been minimized as it makes the dataset more complex and often leads to mis-annotation of metabolites. Here, we introduce an approach termed PICA (for pixel intensity

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  10. 15 Jan 2023 Journal Article Environmental Research

    A new fluorescence-based methodology for studying bioaerosol scavenging processes using a hyperspectral LIF-LIDAR remote sensing system

    Ofir Shoshanim, Adva Baratz
    Abstract

    This paper presents a novel experimental approach to in-situ study of atmospheric phenomena such as nucleation scavenging by biological seeds, bio-droplet dehydration, and bioaerosol's particle scavenging by raindrops. Our methodology is based on the analysis of the dynamical changes of fluorescence signal. We use a remote sensing system based on a homebuilt hyperspectral

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