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  1. Article ; Online: Olive Mill Wastewater (OMW) Treatment Using Photocatalyst Media

    Abeer Al Bawab / Muna Abu-Dalo / Aya Khalaf / Duaa Abu-Dalo

    Catalysts, Vol 12, Iss 539, p

    2022  Volume 539

    Abstract: A new nanophotocatalysts series of M 2 Zr 2 O 7 (M = Mn, Cu, and Fe) and doped Fe 2 Zr 2 O 7 systems were prepared via sol-gel using the pechini method , characterized, and tested in photocatalytic degradation of olive mill wastewater (OMW). The ... ...

    Abstract A new nanophotocatalysts series of M 2 Zr 2 O 7 (M = Mn, Cu, and Fe) and doped Fe 2 Zr 2 O 7 systems were prepared via sol-gel using the pechini method , characterized, and tested in photocatalytic degradation of olive mill wastewater (OMW). The photocatalytic degradation of the prepared materials was evaluated by measuring total phenolic compounds (TPCs) using the Folin-Ciocalteu method for variable pH under a commercial LED lamp (45 W). The removal of TPCs was measured at different contact times ranging from 2 h to 6 days. X-ray diffraction (XRD) and transmission electron microscope (TEM) analysis approved the nano size of (5–17 nm) and quasi-spherical morphology of the prepared materials. ICP-OES analysis confirmed the XRD analysis and approved the structure of the prepared materials. Aggregation of the nanomaterials was observed using TEM imaging. Brunauer-Emmett-Teller (BET) analysis measured a 67 m 2 /g surface area for Fe 2 Zr 2 O 7 . Doping Fe with Mn increased the surface area to 173 m 2 /g and increased to 187 m 2 /g with a further increase of the Mn dopant. Increasing the Mn dopant concentration increased both surface area and photocatalytic degradation. The highest degradation of TPCs was observed for Mn 2 Zr 2 O 7 around 70% at pH 10 and exposure time up to one day.
    Keywords nanophotocatalysts ; phenolic compounds ; olive mill wastewater (OMW) ; sol-gel ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
    Subject code 290
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Photodegradation of Carbol Fuchsin Dye Using an Fe 2−x Cu x Zr 2−x W x O 7 Photocatalyst under Visible-Light Irradiation

    Rund Abu-Zurayk / Aya Khalaf / Hussien A. Abbas / Rabab A. Nasr / Tarek S. Jamil / Abeer Al Bawab

    Catalysts, Vol 11, Iss 1473, p

    2021  Volume 1473

    Abstract: Fe 2−x Cu x Zr 2−x W x O 7 (x: 0, 0.05, 0.015) nanoparticles were synthesized following the Pechini method and characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance spectroscopy (DRS) measurements to ... ...

    Abstract Fe 2−x Cu x Zr 2−x W x O 7 (x: 0, 0.05, 0.015) nanoparticles were synthesized following the Pechini method and characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance spectroscopy (DRS) measurements to be used as photocatalysts in colored water remediation. All of the prepared materials were crystallized in a cubic fluorite phase as the major phase. The band gap was reduced upon doping with W 6+ and Cu 2+ from 1.96 eV to 1.47 eV for Fe 1.85 Cu 0 . 15 Zr 1.85 W 0.15 O 7 . Carbol fuchsin (CF) dye was used to determine the photocatalytic degradation efficiency of the prepared catalysts. Degradation efficiency was directly proportional to the dopant’s concentration. Complete removal of 20 mg/L CF was achieved under optimal conditions (pH 9, and catalyst loading of 1.5 g/L) using Fe 1.85 Cu 0.15 Zr 1.85 W 0.15 O 7 . The degradation rate followed pseudo-first-order kinetics. The reusability for photocatalysts was tested five times, decreasing its efficiency by 4% after the fifth cycle, which indicates that the prepared Fe 1.85 Cu 0.15 Zr 1.85 W 0.15 O 7 photocatalyst is a promising novel photocatalyst due to its superior efficiency in dye photodegradation.
    Keywords photodegradation ; carbol fuchsin ; photocatalysts ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
    Subject code 290 ; 669
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: An adversarial collaboration protocol for testing contrasting predictions of global neuronal workspace and integrated information theory.

    Lucia Melloni / Liad Mudrik / Michael Pitts / Katarina Bendtz / Oscar Ferrante / Urszula Gorska / Rony Hirschhorn / Aya Khalaf / Csaba Kozma / Alex Lepauvre / Ling Liu / David Mazumder / David Richter / Hao Zhou / Hal Blumenfeld / Melanie Boly / David J Chalmers / Sasha Devore / Francis Fallon /
    Floris P de Lange / Ole Jensen / Gabriel Kreiman / Huan Luo / Theofanis I Panagiotaropoulos / Stanislas Dehaene / Christof Koch / Giulio Tononi

    PLoS ONE, Vol 18, Iss 2, p e

    2023  Volume 0268577

    Abstract: The relationship between conscious experience and brain activity has intrigued scientists and philosophers for centuries. In the last decades, several theories have suggested different accounts for these relationships. These theories have developed in ... ...

    Abstract The relationship between conscious experience and brain activity has intrigued scientists and philosophers for centuries. In the last decades, several theories have suggested different accounts for these relationships. These theories have developed in parallel, with little to no cross-talk among them. To advance research on consciousness, we established an adversarial collaboration between proponents of two of the major theories in the field, Global Neuronal Workspace and Integrated Information Theory. Together, we devised and preregistered two experiments that test contrasting predictions of these theories concerning the location and timing of correlates of visual consciousness, which have been endorsed by the theories' proponents. Predicted outcomes should either support, refute, or challenge these theories. Six theory-impartial laboratories will follow the study protocol specified here, using three complementary methods: Functional Magnetic Resonance Imaging (fMRI), Magneto-Electroencephalography (M-EEG), and intracranial electroencephalography (iEEG). The study protocol will include built-in replications, both between labs and within datasets. Through this ambitious undertaking, we hope to provide decisive evidence in favor or against the two theories and clarify the footprints of conscious visual perception in the human brain, while also providing an innovative model of large-scale, collaborative, and open science practice.
    Keywords Medicine ; R ; Science ; Q
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Human visual consciousness involves large scale cortical and subcortical networks independent of task report and eye movement activity

    Sharif I. Kronemer / Mark Aksen / Julia Z. Ding / Jun Hwan Ryu / Qilong Xin / Zhaoxiong Ding / Jacob S. Prince / Hunki Kwon / Aya Khalaf / Sarit Forman / David S. Jin / Kevin Wang / Kaylie Chen / Claire Hu / Akshar Agarwal / Erik Saberski / Syed Mohammad Adil Wafa / Owen P. Morgan / Jia Wu /
    Kate L. Christison-Lagay / Nicholas Hasulak / Martha Morrell / Alexandra Urban / R. Todd Constable / Michael Pitts / R. Mark Richardson / Michael J. Crowley / Hal Blumenfeld

    Nature Communications, Vol 13, Iss 1, Pp 1-

    2022  Volume 17

    Abstract: Isolating the neural mechanisms of consciousness is complicated by task report and other irrelevant signals. Here, the authors removed report and eye movement confounds to uncover large scale cortical-subcortical networks specific for human visual ... ...

    Abstract Isolating the neural mechanisms of consciousness is complicated by task report and other irrelevant signals. Here, the authors removed report and eye movement confounds to uncover large scale cortical-subcortical networks specific for human visual consciousness.
    Keywords Science ; Q
    Language English
    Publishing date 2022-11-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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