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Porphyromonas gingivalis induces neuroinflammation in a gingipain-dependent manner in zebrafish larvae
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Harnessing inactive molybdenum species in ill-defined catalyst to work in propylene metathesis by propane pretreatment
No full textRising imbalance in olefins demand and searching for more selective way of olefins production leads to increase importance of the on-purpose technologies. A special role plays olefin metathesis that (due to its reversibility) can be used as a switching reaction for compensation imbalance between produced olefins in the large-scale petrochemical processes. In this work a simple and effective procedure for generation of active in olefin metathesis sites over molybdenum oxide catalysts containing between 1 to 20 wt% of prepared by a simple incipient wetness impregnation of silica has been investigated. Compared with inert gas pretreatment a significant improvement (1–2 orders of magnitude) in propylene metathesis activity at 50 °C was achieved after pretreatment in propane between 550 to 650 °C. Physicochemical studies of the catalysts before and after the processes, in-situ UV–Vis analysis during activation, and temperature-programmed surface reaction studies allowed the identification of two distinct stages (clearly visible above 550 °C) during catalyst heating in a propane stream. In the first stage, partial reduction of Mo(VI) occurs simultaneously with the formation of propane reduction products, and as the reduction progresses, propylene is formed through propane dehydrogenation. The second stage, propylene aromatization, takes place on a deeply reduced catalyst. The metathesis activity increases significantly during the reduction stage, reaching its maximum value precisely when the aromatization stage begins. Possible pathways of Mo active sites generation at high temperature in the presence of propane were proposed based on temperature-programmed surface reactions and DFT calculations
Randomized controlled trial of mechanical thrombectomy with anticoagulation versus anticoagulation alone for acute intermediate-high risk pulmonary embolism : primary outcomes from the STORM-PE trial
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Exploring inorganic–organic hybrids : poly(meth)acrylate-polydimethylsiloxane copolymers synthesis in mild conditions
No full textHighly economical and environmentally friendly synthesis of a wide range of hydrophobic and hydrophilic poly(meth)acrylates with a low dispersity of D̵ < 1.3 and an initiation efficiency close to 100% by means of atom transfer radical polymerization (ATRP) is reported. This was possible thanks to the use of 2-propanol, which creates a versatile reaction medium that allows polymerization of monomers showing different hydrophilicities. The developed procedures of polymerization, utilizing metallic copper, ascorbic acid, or tertiary amine groups of monomers in the role of reducing agents, were furthermore applied in synthesis of triblock copolymers (TBC) grafted from the polydimethylsiloxane (PDMS) bifunctional, linear macroinitiator. This way, a series of amphiphilic macromolecules with various PDMS contents, including functional, pH-sensitive, and thermosensitive copolymers, were synthesized and characterized using proton and carbon-13 nuclear magnetic resonance (1H NMR, 13C NMR) and attenuated total reflectance infrared (ATR-IR) spectroscopies. The presence of the flexible PDMS core and hydroxyl groups in the outer blocks further enabled the preparation of copolymers with a complex structure of bottlebrushes with spherical topology, which were visualized using atom force microscopy (AFM). Biocompatibility of the obtained PDMS-based materials was evaluated with lactate dehydrogenase (LDH) cytotoxicity assay toward human dermal fibroblasts (HDF) and retinal pigment epithelium cells (RPE), which demonstrated over 85% cell viability after 7 days of incubation
Russia is testing NATO : Prof. Kozerawski : "Davos brought a temporary calm"
No full text22 stycznia 2026 r. na antenie Radia Kraków oraz na platformie internetowej radiokrakow.pl z rekomendacji UJ ukazał się kolejny wywiad z prof. dr. hab. Dariuszem Kozerawskim, pracownikiem naukowym Katedry Bezpieczeństwa Narodowego (Instytut Nauk Politycznych i Stosunków Międzynarodowych, Wydział Studiów Międzynarodowych i Politycznych) Uniwersytetu Jagiellońskiego, w którym ujęte zostały między innymi opinie dotyczące: negocjacji podczas forum w Davos, które przyniosły chwilowe uspokojenie napięć wokół Grenlandii i relacji USA-NATO, głównie dzięki roli sekretarza generalnego NATO Marka Ruttego; dążeń Stanów Zjednoczonych do wzmocnienia swojej obecności militarnej w Grenlandii i Arktyce ze względu na bezpieczeństwo, surowce i kontrolę szlaków morskich; twierdzenia Donalda Trumpa o braku wsparcia NATO dla USA, które jest niezgodne z faktami, co pokazuje zaangażowanie Sojuszu po 11 września 2001 roku w ramach operacji stabilizacyjnych w Afganistanie; potrzeby budowania własnych zdolności obronnych i przygotowania się na zagrożenia hybrydowe ze strony Rosji.On January 22, 2026, Radio Kraków and the online platform radiokrakow.pl, at the recommendation of the Jagiellonian University, published another interview with Prof. Dariusz Kozerawski, a researcher at the Department of National Security (Institute of Political Science and International Relations, Faculty of International and Political Studies) at the Jagiellonian University. The interview included, among other things, opinions on: the negotiations during the Davos forum, which brought a temporary calm to tensions surrounding Greenland and US-NATO relations, mainly thanks to the role of NATO Secretary General Mark Rutte; the United States' efforts to strengthen its military presence in Greenland and the Arctic for reasons of security, raw materials, and control of sea routes; Donald Trump’s claims about the lack of NATO support for the USA, which are factually inconsistent, as demonstrated by the Alliance’s involvement after September 11, 2001, in stabilization operations in Afghanistan; the need to build our own defense capabilities and prepare for hybrid threats from Russia
