University of Patras

About: University of Patras is a education organization based out in Pátrai, Greece. It is known for research contribution in the topics: Population & Catalysis. The organization has 13372 authors who have published 31263 publications receiving 677159 citations. The organization is also known as: Panepistímio Patrón.

Crucial Role of Granulocytic Myeloid-Derived Suppressor Cells in the Regulation of Central Nervous System Autoimmune Disease

Abstract: There is a need in autoimmune diseases to uncover the mechanisms involved in the natural resolution of inflammation. In this article, we demonstrate that granulocytic myeloid-derived suppressor cells (G-MDSCs) abundantly accumulate within the peripheral lymphoid compartments and target organs of mice with experimental autoimmune encephalomyelitis prior to disease remission. In vivo transfer of G-MDSCs ameliorated experimental autoimmune encephalomyelitis, significantly decreased demyelination, and delayed disease onset through inhibition of encephalitogenic Th1 and Th17 immune responses. Exposure of G-MDSCs to the autoimmune milieu led to up-regulation of the programmed death 1 ligand that was required for the G-MDSC–mediated suppressive function both in vitro and in vivo. Importantly, myeloid-derived suppressor cells were enriched in the periphery of subjects with active multiple sclerosis and suppressed the activation and proliferation of autologous CD4+ T cells ex vivo. Collectively, this study revealed a pivotal role for myeloid-derived suppressor cells in the regulation of multiple sclerosis, which could be exploited for therapeutic purposes.

Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures.

Abstract: Human activity causes vibrations that propagate into the ground as high-frequency seismic waves. Measures to mitigate the coronavirus disease 2019 (COVID-19) pandemic caused widespread changes in human activity, leading to a months-long reduction in seismic noise of up to 50%. The 2020 seismic noise quiet period is the longest and most prominent global anthropogenic seismic noise reduction on record. Although the reduction is strongest at surface seismometers in populated areas, this seismic quiescence extends for many kilometers radially and hundreds of meters in depth. This quiet period provides an opportunity to detect subtle signals from subsurface seismic sources that would have been concealed in noisier times and to benchmark sources of anthropogenic noise. A strong correlation between seismic noise and independent measurements of human mobility suggests that seismology provides an absolute, real-time estimate of human activities.

Principles and applications of CVD powder technology

Abstract: Chemical vapor deposition (CVD) is an important technique for surface modification of powders through either grafting or deposition of films and coatings. The efficiency of this complex process primarily depends on appropriate contact between the reactive gas phase and the solid particles to be treated. Based on this requirement, the first part of this review focuses on the ways to ensure such contact and particularly on the formation of fluidized beds. Combination of constraints due to both fluidization and chemical vapor deposition leads to the definition of different types of reactors as an alternative to classical fluidized beds, such as spouted beds, circulating beds operating in turbulent and fast-transport regimes or vibro-fluidized beds. They operate under thermal but also plasma activation of the reactive gas and their design mainly depends on the type of powders to be treated. Modeling of both reactors and operating conditions is a valuable tool for understanding and optimizing these complex processes and materials. In the second part of the review, the state of the art on materials produced by fluidized bed chemical vapor deposition is presented. Beyond pioneering applications in the nuclear power industry, application domains, such as heterogeneous catalysis, microelectronics, photovoltaics and protection against wear, oxidation and heat are potentially concerned by processes involving chemical vapor deposition on powders. Moreover, simple and reduced cost FBCVD processes where the material to coat is immersed in the FB, allow the production of coatings for metals with different wear, oxidation and corrosion resistance. Finally, large-scale production of advanced nanomaterials is a promising area for the future extension and development of this technique.

Supersymmetric AdS(6) via T Duality

Abstract: We present a new supersymmetric ${\mathrm{AdS}}_{6}$ solution of type IIB supergravity with $SU(2)$ isometry. Through the AdS/CFT correspondence, this has potentially very interesting implications for 5D fixed point theories. This solution is the result of a non-Abelian $T$ duality on the known supersymmetric ${\mathrm{AdS}}_{6}$ solution of massive IIA. The $SU(2)$ $R$ symmetry is untouched, leading to sixteen supercharges and preserved supersymmetry.

A High-Performance Solid-State Dye-Sensitized Photoelectrochemical Cell Employing a Nanocomposite Gel Electrolyte Made by the Sol–Gel Route

Abstract: Osteryoung, J. Electrochem. Soc. 1997, 144, 3881. c) A. B. McEwen, H. L.Ngo, K. LeCompte, J. L. Goldman, J. Electrochem. Soc. 1999, 146, 1687.[6] a) C. J. Bowlas, D. W. Bruce, K. R. Seddon, Chem. Commun. 1996, 1625.b) K. M. Lee, C. K. Lee, I. J. B. Lin, Chem. Commun. 1997, 899. c) J. D.Holbrey, K. R. Seddon, J. Chem. Soc., Dalton Trans. 1999, 2133. d) F.Neve, O. Francescangeli, A. Crispini, J. Charmant, Chem. Mater. 2001, 13,2032.[7] a) J. S. Wilkes, M. J. Zaworotko, J. Chem. Soc., Chem. Commun. 1992,965. b) R. Hagiwara, Y. Ito, J. Fluorine Chem. 2000, 105, 221.[8] a) B. Neumann, C. Sauer, S. Diele, C. Tschierske, J. Mater. Chem. 1996, 6,1087. b) M. Kolbel, T. Beyersdorff, C. Tschierske, S. Diele, J. Kain, Chem.Eur. J. 2000, 6, 3821. c) T. Kato, Struct. Bonding 2000, 96, 95.[9] M. Hird, G. W. Gray, K. J. Toyne, Mol. Cryst. Liq. Cryst. 1991, 206, 187.[10] D. L. Hughes, Org. React. 1992, 42, 335.