3,262 results on '"Sulik A"'
Search Results
2. Irradiation induced mineral changes of NWA10580 meteorite determined by infrared analysis
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Gyollai, I., Biri, S., Juhász, Z., Király, Cs., Pál, B. D., Rácz, R., Rezes, D., Sulik, B., Szabó, M., Szalai, Z., Szávai, P., Szklenár, T., and Kereszturi, Á.
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Astrophysics - Earth and Planetary Astrophysics ,Physics - Geophysics - Abstract
Context. Identifying minerals on asteroid surfaces is difficult as space weathering modifies the minerals infrared spectra. This shouldbe better understood for proper interpretation. Aims. We simulated the space weathering effects on a meteorite and recorded the alterations of the crystalline structure, such as the change in peak positions and full width at half maximum values. Methods. We used proton irradiation to simulate the effects of solar wind on a sample of NWA 10580 CO3 chondrite meteorites. After irradiation in three gradually increased steps with 1 keV ion energy, we used infrared microscopic reflectance and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) to identify and understand the consequences of irradiation. Results. We find negative peak shifts after the first and second irradiations at pyroxene and feldspar minerals, similarly to the literature, and this shift was attributed to Mg loss. However, after the third irradiation a positive change in values in wavenumber emerged for silicates, which could come from the distortion of SiO4 tetrahedra, resembling shock deformation. The full width at half maximum values of major bands show a positive (increasing) trend after irradiations in the case of feldspars, using IR reflection measurements. Comparing DRIFTS and reflection infrared data, the peak positions of major mineral bands were at similar wavenumbers, but differences can be observed in minor bands. Conclusions. We measured the spectral changes of meteorite minerals after high doses of proton irradiation for several minerals. We show the first of these measurements for feldspars; previous works only presented pyroxene, olivine, and phyllosilicates.
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- 2024
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3. Widening global variability in grassland biomass since the 1980s
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MacDougall, Andrew S., Esch, Ellen, Chen, Qingqing, Carroll, Oliver, Bonner, Colin, Ohlert, Timothy, Siewert, Matthias, Sulik, John, Schweiger, Anna K., Borer, Elizabeth T., Naidu, Dilip, Bagchi, Sumanta, Hautier, Yann, Wilfahrt, Peter, Larson, Keith, Olofsson, Johan, Cleland, Elsa, Muthukrishnan, Ranjan, O’Halloran, Lydia, Alberti, Juan, Anderson, T. Michael, Arnillas, Carlos A., Bakker, Jonathan D., Barrio, Isabel C., Biederman, Lori, Boughton, Elizabeth H., Brudvig, Lars A., Bruschetti, Martin, Buckley, Yvonne, Bugalho, Miguel N., Cadotte, Marc W., Caldeira, Maria C., Catford, Jane A., D’Antonio, Carla, Davies, Kendi, Daleo, Pedro, Dickman, Christopher R., Donohue, Ian, DuPre, Mary Ellyn, Elgersma, Kenneth, Eisenhauer, Nico, Eskelinen, Anu, Estrada, Catalina, Fay, Philip A., Feng, Yanhao, Gruner, Daniel S., Hagenah, Nicole, Haider, Sylvia, Harpole, W. Stanley, Hersch-Green, Erika, Jentsch, Anke, Kirkman, Kevin, Knops, Johannes M. H., Laanisto, Lauri, Lannes, Lucíola S., Laungani, Ramesh, Lkhagva, Ariuntsetseg, Macek, Petr, Martina, Jason P., McCulley, Rebecca L., Melbourne, Brett, Mitchell, Rachel, Moore, Joslin L., Morgan, John W., Muraina, Taofeek O., Niu, Yujie, Pärtel, Meelis, Peri, Pablo L., Power, Sally A., Price, Jodi N., Prober, Suzanne M., Ren, Zhengwei, Risch, Anita C., Smith, Nicholas G., Sonnier, Grégory, Standish, Rachel J., Stevens, Carly J., Tedder, Michelle, Tognetti, Pedro, Veen, G. F. (Ciska), Virtanen, Risto, Wardle, Glenda M., Waring, Elizabeth, Wolf, Amelia A., Yahdjian, Laura, and Seabloom, Eric W.
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- 2024
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4. Treatment outcomes and their predictors in children hospitalized with varicella complicated by bacterial superinfections after pandemic of COVID-19 – a retrospective multicenter analysis of real-life data in Poland
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Pokorska-Śpiewak, Maria, Szenborn, Leszek, Pietrzak, Maja, Marczyńska, Magdalena, Mania, Anna, Stopyra, Lidia, Moppert, Justyna, Toczyłowski, Kacper, Sulik, Artur, Szenborn, Filip, Jasonek, Jolanta, Barańska-Nowicka, Inga, Buciak, Adrianna, Majda-Stanisławska, Ewa, Ciechanowski, Przemysław, Karny, Katarzyna, Kuchar, Ernest, Figlerowicz, Magdalena, and Pawłowska, Małgorzata
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- 2024
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5. Choice enhances touch pleasantness
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Gorman, Lenka, Sun, Wenhan, Mathew, Jyothisa, Rezazadeh, Zahra, Sulik, Justin, Fairhurst, Merle, and Deroy, Ophelia
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- 2024
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6. Speed-Accuracy Trade-Off? Not so Fast: Marginal Changes in Speed Have Inconsistent Relationships with Accuracy in Real-World Settings
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Domingue, Benjamin W., Kanopka, Klint, Stenhaug, Ben, Sulik, Michael J., Beverly, Tanesia, Brinkhuis, Matthieu, Circi, Ruhan, Faul, Jessica, Liao, Dandan, McCandliss, Bruce, Obradovic, Jelena, Piech, Chris, Porter, Tenelle, Soland, James, Weeks, Jon, Wise, Steven L., and Yeatman, Jason
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The speed-accuracy trade-off (SAT) suggests that time constraints reduce response accuracy. Its relevance in observational settings--where response time (RT) may not be constrained but respondent speed may still vary--is unclear. Using 29 data sets containing data from cognitive tasks, we use a flexible method for identification of the SAT (which we test in extensive simulation studies) to probe whether the SAT holds. We find inconsistent relationships between time and accuracy; marginal increases in time use for an individual do not necessarily predict increases in accuracy. Additionally, the speed-accuracy relationship may depend on the underlying difficulty of the interaction. We also consider the analysis of items and individuals; of particular interest is the observation that respondents who exhibit more within-person variation in response speed are typically of lower ability. We further find that RT is typically a weak predictor of response accuracy. Our findings document a range of empirical phenomena that should inform future modeling of RTs collected in observational settings. [This work was co-written by the Project iLEAD Consortium.]
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- 2022
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7. Bystanders’ collective responses set the norm against hate speech
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Zapata, Jimena, Sulik, Justin, von Wulffen, Clemens, and Deroy, Ophelia
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- 2024
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8. The Importance of EU Taxonomy for Sustainable Development Reporting. Case Study of Entities Listed on the Warsaw Stock Exchange in Poland
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Sulik-Górecka Aleksandra, Biały Witold, and Strojek-Filus Marzena
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csr ,csrd ,sustainable development ,environmental investments ,financial statement ,ifrs ,Production management. Operations management ,TS155-194 - Abstract
The introduction of the obligation to prepare ESG reports taking into account EU Taxonomy is a challenge for enterprises, but at the same time opens up the possibility of using disclosures in this area to assess entities in the context of environmentally sustainable activities. Legal changes in the field of the Green Deal have been introduced in the last three years, and in the area of EU taxonomy this process is still ongoing, resulting in a deficit of research on the effects of implementing the new legal regulations. The main goal of our study is to assess the importance of the newly applicable ESG reporting and environmental disclosure requirements under EU Taxonomy in improving the quality and comparability of sustainability reporting and the creation of ESG ratings. A qualitative research method was applied based on multiple case studies using content analysis on the basis of ESG reports for 2021-2022 for entities listed on the Warsaw Stock Exchange. The research results indicate a very low level of activities classified as environmentally sustainable and taxonomy-aligned. Additionally, the results may also indicate problems with implementing the new solutions in reporting practice. At the same time, a positive impact is noted of the implementation of taxonomic reports on improving the comparability and detail of disclosures.
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- 2024
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9. Author Correction: Widening global variability in grassland biomass since the 1980s
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MacDougall, Andrew S., Esch, Ellen, Chen, Qingqing, Carroll, Oliver, Bonner, Colin, Ohlert, Timothy, Siewert, Matthias, Sulik, John, Schweiger, Anna K., Borer, Elizabeth T., Naidu, Dilip, Bagchi, Sumanta, Hautier, Yann, Wilfahrt, Peter, Larson, Keith, Olofsson, Johan, Cleland, Elsa, Muthukrishnan, Ranjan, O’Halloran, Lydia, Alberti, Juan, Anderson, T. Michael, Arnillas, Carlos A., Bakker, Jonathan D., Barrio, Isabel C., Biederman, Lori, Boughton, Elizabeth H., Brudvig, Lars A., Bruschetti, Martin, Buckley, Yvonne, Bugalho, Miguel N., Cadotte, Marc W., Caldeira, Maria C., Catford, Jane A., D’Antonio, Carla, Davies, Kendi, Daleo, Pedro, Dickman, Christopher R., Donohue, Ian, DuPre, Mary Ellyn, Elgersma, Kenneth, Eisenhauer, Nico, Eskelinen, Anu, Estrada, Catalina, Fay, Philip A., Feng, Yanhao, Gruner, Daniel S., Hagenah, Nicole, Haider, Sylvia, Harpole, W. Stanley, Hersch-Green, Erika, Jentsch, Anke, Kirkman, Kevin, Knops, Johannes M. H., Laanisto, Lauri, Lannes, Lucíola S., Laungani, Ramesh, Lkhagva, Ariuntsetseg, Macek, Petr, Martina, Jason P., McCulley, Rebecca L., Melbourne, Brett, Mitchell, Rachel, Moore, Joslin L., Morgan, John W., Muraina, Taofeek O., Niu, Yujie, Pärtel, Meelis, Peri, Pablo L., Power, Sally A., Price, Jodi N., Prober, Suzanne M., Ren, Zhengwei, Risch, Anita C., Smith, Nicholas G., Sonnier, Grégory, Standish, Rachel J., Stevens, Carly J., Tedder, Michelle, Tognetti, Pedro, Veen, G. F. (Ciska), Virtanen, Risto, Wardle, Glenda M., Waring, Elizabeth, Wolf, Amelia A., Yahdjian, Laura, and Seabloom, Eric W.
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- 2024
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10. Bombardment of CO ice by cosmic rays: I. Experimental insights into the microphysics of molecule destruction and sputtering
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Ivlev, Alexei V., Giuliano, Barbara M., Juhász, Zoltán, Herczku, Péter, Sulik, Béla, Mifsud, Duncan V., Kovács, Sándor T. S., Rahul, K. K., Rácz, Richárd, Biri, Sándor, Rajta, István, Vajda, István, Mason, Nigel J., Ioppolo, Sergio, and Caselli, Paola
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
We present a dedicated experimental study of microscopic mechanisms controlling radiolysis and sputtering of astrophysical ices due to their bombardment by cosmic ray ions. Such ions are slowed down due to inelastic collisions with bound electrons, resulting in ionization and excitation of ice molecules. In experiments on CO ice irradiation, we show that the relative contribution of these two mechanisms of energy loss to molecule destruction and sputtering can be probed by selecting ion energies near the peak of the electronic stopping power. We have observed a significant asymmetry, both in the destruction cross section and the sputtering yield, for pairs of ion energies corresponding to same values of the stopping power on either side of the peak. This implies that the stopping power does not solely control these processes, as usually assumed in the literature. Our results suggest that electronic excitations represent a significantly more efficient channel for radiolysis and, possibly, also for sputtering of CO ice. We also show that the charge state of incident ions as well as the rate for CO$^+$ production in the ice have negligible effect on these processes., Comment: Accepted for publication in ApJ
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- 2023
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11. Proton and electron irradiations of CH4:H2O mixed ices
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Mifsud, Duncan V., Herczku, Péter, Sulik, Béla, Juhász, Zoltán, Vajda, István, Rajta, István, Ioppolo, Sergio, Mason, Nigel J., Strazzulla, Giovanni, and Kanuchová, Zuzana
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Earth and Planetary Astrophysics - Abstract
The organic chemistry occurring in interstellar environments may lead to the production of complex molecules that are relevant to the emergence of life. Therefore, in order to understand the origins of life itself, it is necessary to probe the chemistry of carbon-bearing molecules under conditions that simulate interstellar space. Several of these regions, such as dense molecular cores, are exposed to ionizing radiation in the form of galactic cosmic rays, which may act as an important driver of molecular destruction and synthesis. In this paper, we report the results of a comparative and systematic study of the irradiation of CH4:H2O ice mixtures by 1 MeV protons and 2 keV electrons at 20 K.We demonstrate that our irradiations result in the formation of a number of new products, including both simple and complex daughter molecules such as C2H6, C3H8, C2H2, CH3OH, CO, CO2, and probably also H2CO. A comparison of the different irradiation regimes has also revealed that proton irradiation resulted in a greater abundance of radiolytic daughter molecules compared to electron irradiation, despite a lower radiation dose having been administered. These results are important in the context of the radiation astrochemistry occurring within the molecular cores of dense interstellar clouds, as well as on outer Solar System objects., Comment: Published as an open access article in the MDPI journal Atoms
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- 2023
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12. Sulfur Ion Implantations Into Condensed CO2: Implications for Europa
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Mifsud, D. V., Kaňuchová, Z., Herczku, P., Juhász, Z., Kovács, S. T. S., Lakatos, G., Rahul, K. K., Rácz, R., Sulik, B., Biri, S., Rajta, I., Vajda, I., Ioppolo, S., McCullough, R. W., and Mason, N. J.
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Astrophysics - Earth and Planetary Astrophysics ,Physics - Space Physics - Abstract
The ubiquity of sulfur ions within the Jovian magnetosphere has led to suggestions that the implantation of these ions into the surface of Europa may lead to the formation of SO2. However, previous studies on the implantation of sulfur ions into H2O ice (the dominant species on the Europan surface) have failed to detect SO2 formation. Other studies concerned with similar implantations into CO2 ice, which is also known to exist on Europa, have offered seemingly conflicting results. In this letter, we describe the results of a study on the implantation of 290 keV S+ ions into condensed CO2 at 20 and 70 K. Our results demonstrate that SO2 is observed after implantation at 20 K, but not at the Europa-relevant temperature of 70 K. We conclude that this process is likely not a reasonable mechanism for SO2 formation on Europa, and that other mechanisms should be explored instead., Comment: Published in Geophysical Research Letters
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- 2022
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13. Lactation related changes of haematological parameters of female dromedary camels reared under semiintensive farming system in Algerian extreme arid region
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Maria, Chikha, Tarek, Khenenou, Gherissi, Djalel Eddine, Rabah, Mayouf, Rahmoun, Djallal Eddine, Naif, Al-Gabri, Nacira, Ramdani, Abu-Sulik, Anas Ayyad, Hafiza, Aidoudi, and El-Bahr, Sabry Mohamed
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- 2024
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14. Energetic Electron Irradiations of Amorphous and Crystalline Sulphur-Bearing Astrochemical Ices
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Mifsud, Duncan V., Herczku, Péter, Rácz, Richárd, Rahul, K. K., Kovács, Sándor T. S., Juhász, Zoltán, Sulik, Béla, Biri, Sándor, McCullough, Robert W., Kaňuchová, Zuzana, Ioppolo, Sergio, Hailey, Perry A., and Mason, Nigel J.
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Physics - Chemical Physics ,Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Condensed Matter - Other Condensed Matter - Abstract
Laboratory experiments have confirmed that the radiolytic decay rate of astrochemical ice analogues is dependent upon the solid phase of the target ice, with some crystalline molecular ices being more radio-resistant than their amorphous counterparts. The degree of radio-resistance exhibited by crystalline ice phases is dependent upon the nature, strength, and extent of the intermolecular interactions that characterise their solid structure. For example, it has been shown that crystalline CH3OH decays at a significantly slower rate when irradiated by 2 keV electrons at 20 K than does the amorphous phase due to the stabilising effect imparted by the presence of an extensive array of strong hydrogen bonds. These results have important consequences for the astrochemistry of interstellar ices and outer Solar System bodies, as they imply that the chemical products arising from the irradiation of amorphous ices (which may include prebiotic molecules relevant to biology) should be more abundant than those arising from similar irradiations of crystalline phases. In this present study, we have extended our work on this subject by performing comparative energetic electron irradiations of the amorphous and crystalline phases of the sulphur-bearing molecules H2S and SO2 at 20 K. We have found evidence for phase-dependent chemistry in both these species, with the radiation-induced exponential decay of amorphous H2S being more rapid than that of the crystalline phase, similar to the effect that has been previously observed for CH3OH. For SO2, two fluence regimes are apparent: a low-fluence regime in which the crystalline ice exhibits a rapid exponential decay while the amorphous ice possibly resists decay, and a high-fluence regime in which both phases undergo slow exponential-like decays., Comment: Published in Frontiers in Chemistry (open access)
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- 2022
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15. Varicella-Zoster Disease of the Central Nervous System in Immunocompetent Children: Case Series and a Scoping Review
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Dawid Lewandowski, Kacper Toczylowski, Malgorzata Kowalska, Milena Krasnodębska, Iryna Krupienko, Karolina Nartowicz, Magdalena Sulik, and Artur Sulik
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meningitis ,encephalitis ,varicella ,zoster ,immunocompetent ,VZV ,Medicine - Abstract
Background: Varicella-Zoster Virus (VZV) is characterized by its ability to enter a dormant state within the body. When the wild or vaccine virus reactivates, it can lead to herpes zoster (HZ), which infrequently manifests as a neuroinfection. Objectives: The aim of the study was to analyze the clinical manifestations and outcomes associated with VZV reactivation in the CNS in immunocompetent children. Methods: We searched medical databases for case reports using the keywords “zoster”, “meningitis”, “encephalitis”, and “immunocompetent”. The inclusion criteria were age below 18 years, any gender, race, and ethnicity, no features or history of immunodeficiency, and confirmation of VZV reactivation through the detection of VZV DNA in the CSF. Patients were categorized into two groups: children experiencing the reactivation of the wild virus and children with the vaccine strain virus. Results: The cohort included six children hospitalized in our hospital and 49 children reported in the literature. In 37 (67%), a wild-type virus was detected, while in 18 (33%), an infection was caused by the vaccine strain. There were no differences in the clinical presentation between the two groups. A typical rash was observed in 32 (58%) children. Approximately 41 of the 55 children (75%) received antiviral treatment. Four patients experienced complications. Conclusions: Neither a history of VZV immunization nor the absence of a skin rash can definitively exclude VZV meningitis. It is important to note that any seemingly healthy child, regardless of recognized risk factors, could develop HZ meningitis.
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- 2024
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16. Ozone Production in Electron Irradiated CO2:O2 Ices
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Mifsud, Duncan V., Kaňuchová, Zuzana, Ioppolo, Sergio, Herczku, Péter, Muiña, Alejandra Traspas, Sulik, Béla, Rahul, K. K., Kovács, Sándor T. S., Hailey, Perry A., McCullough, Robert W., Mason, Nigel J., and Juhász, Zoltán
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Astrophysics - Earth and Planetary Astrophysics ,Condensed Matter - Other Condensed Matter - Abstract
The detection of ozone (O3) in the surface ices of Ganymede, Jupiters largest moon, and of the Saturnian moons Rhea and Dione, has motivated several studies on the route of formation of this species. Previous studies have successfully quantified trends in the production of O3 as a result of the irradiation of pure molecular ices using ultraviolet photons and charged particles (i.e., ions and electrons), such as the abundances of O3 formed after irradiation at different temperatures or using different charged particles. In this study, we extend such results by quantifying the abundance of O3 as a result of the 1 keV electron irradiation of a series of 14 stoichiometrically distinct CO2:O2 astrophysical ice analogues at 20 K. By using mid-infrared spectroscopy as our primary analytical tool, we have also been able to perform a spectral analysis of the asymmetric stretching mode of solid O3 and the variation in its observed shape and profile among the investigated ice mixtures. Our results are important in the context of better understanding the surface composition and chemistry of icy outer Solar System objects, and may thus be of use to future interplanetary space missions such as the ESA Jupiter Icy Moons Explorer and the NASA Europa Clipper missions, as well as the recently launched NASA James Webb Space Telescope., Comment: Accepted for publication in Phys. Chem. Chem. Phys
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- 2022
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17. Laboratory Experiments on the Radiation Astrochemistry of Water Ice Phases
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Mifsud, Duncan V., Hailey, Perry A., Herczku, Péter, Juhász, Zoltán, Kovács, Sándor T. S., Sulik, Béla, Ioppolo, Sergio, Kaňuchová, Zuzana, McCullough, Robert W., Paripás, Béla, and Mason, Nigel J.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics ,Condensed Matter - Other Condensed Matter - Abstract
Water (H2O) ice is ubiquitous component of the universe, having been detected in a variety of interstellar and Solar System environments where radiation plays an important role in its physico-chemical transformations. Although the radiation chemistry of H2O astrophysical ice analogues has been well studied, direct and systematic comparisons of different solid phases are scarce and are typically limited to just two phases. In this article, we describe the results of an in-depth study of the 2 keV electron irradiation of amorphous solid water (ASW), restrained amorphous ice (RAI) and the cubic (Ic) and hexagonal (Ih) crystalline phases at 20 K so as to further uncover any potential dependence of the radiation physics and chemistry on the solid phase of the ice. Mid-infrared spectroscopic analysis of the four investigated H2O ice phases revealed that electron irradiation of the RAI, Ic, and Ih phases resulted in their amorphization (with the latter undergoing the process more slowly) while ASW underwent compaction. The abundance of hydrogen peroxide (H2O2) produced as a result of the irradiation was also found to vary between phases, with yields being highest in irradiated ASW. This observation is the cumulative result of several factors including the increased porosity and quantity of lattice defects in ASW, as well as its less extensive hydrogen-bonding network. Our results have astrophysical implications, particularly with regards to H2O-rich icy interstellar and Solar System bodies exposed to both radiation fields and temperature gradients., Comment: Published in the European Physical Journal D: Atomic, Molecular, Optical, and Plasma Physics
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- 2022
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18. Ivermectin and its synthetic derivatives – A new class of anticancer agents
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Michał Sulik, Dagmara Otto-Ślusarczyk, Michał Antoszczak, Marta Struga, and Adam Huczyński
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Ivermectin ,Rearrangement ,Cytotoxicity ,Apoptosis ,Cell cycle ,Interleukin 6 ,Pharmacy and materia medica ,RS1-441 ,Other systems of medicine ,RZ201-999 - Abstract
Ivermectin (IVR) is a 16-membered macrocyclic lactone of Nobel prize-honored distinction, showing a broad spectrum of biological activity, especially antiparasitic. We have recently designed a practical and scalable procedure for the synthesis of IVR derivatives with a rearranged oxahydrindene (hexahydrobenzofuran) ring that revealed improved antiparasitic activity compared to that of the native structure. Of note, the compounds that show activity towards parasites, very often are active against cancer cells and vice versa. However, the anticancer potential of IVR has not been studied intensively as yet, and there have been no reports on the effects of its synthetic derivatives against cancer cells. Thus, in the study reported, we thoroughly investigated the anticancer activity of IVR and its derivatives against a panel of four human cancer cell lines. We have identified a number of IVR derivatives with improved cytotoxicity and/or cancer cell-targeting selectivity compared to those of reference compounds. Cell cycle analysis has proved that selected compounds increased the number of cancer cells in the subG1 and G0/G1 phases (PC3, MDA-MB-231 and A549) or S/G2/M phase (HCT-116). The strong proapoptotic effect observed for the most promising IVR derivatives has been associated with a significant increase in caspase-3/7 activation and reactive oxygen species (ROS) production. Finally, these derivatives also showed significant inhibition of interleukin-6 (IL-6) cytokine secretion in cancer cells used. Our results indicate that chemical modification of IVR can lead to synthetic products with enhanced anticancer activity, which may provide an excellent starting point for further development of new IVR-derived agents for the treatment against cancer cells.
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- 2024
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19. Comparative Electron Irradiations of Amorphous and Crystalline Astrophysical Ice Analogues
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Mifsud, Duncan V., Hailey, Perry A., Herczku, Péter, Sulik, Béla, Juhász, Zoltán, Kovács, Sándor T. S., Kaňuchová, Zuzana, Ioppolo, Sergio, McCullough, Robert W., Paripás, Béla, and Mason, Nigel J.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Instrumentation and Methods for Astrophysics ,Condensed Matter - Other Condensed Matter - Abstract
Laboratory studies of the radiation chemistry occurring in astrophysical ices have demonstrated the dependence of this chemistry on a number of experimental parameters. One experimental parameter which has received significantly less attention is that of the phase of the solid ice under investigation. In this present study, we have performed systematic 2 keV electron irradiations of the amorphous and crystalline phases of pure CH3OH and N2O astrophysical ice analogues. Radiation-induced decay of these ices and the concomitant formation of products were monitored in situ using FT-IR spectroscopy. A direct comparison between the irradiated amorphous and crystalline CH3OH ices revealed a more rapid decay of the former compared to the latter. Interestingly, a significantly lesser difference was observed when comparing the decay rates of the amorphous and crystalline N2O ices. These observations have been rationalised in terms of the strength and extent of the intermolecular forces present in each ice. The strong and extensive hydrogen-bonding network that exists in crystalline CH3OH (but not in the amorphous phase) is suggested to significantly stabilise this phase against radiation-induced decay. Conversely, although alignment of the dipole moment of N2O is anticipated to be more extensive in the crystalline structure, its weak attractive potential does not significantly stabilise the crystalline phase against radiation-induced decay, hence explaining the smaller difference in decay rates between the amorphous and crystalline phases of N2O compared to those of CH3OH. Our results are relevant to the astrochemistry of interstellar ices and icy Solar System objects, which may experience phase changes due to thermally-induced crystallisation or space radiation-induced amorphisation., Comment: Manuscript contains 18 pages, 6 figures, and 2 tables. Published as an advance article in PCCP
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- 2022
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20. Mid-IR and VUV Spectroscopic Characterisation of Thermally Processed and Electron Irradiated CO2 Astrophysical Ice Analogues
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Mifsud, DV, Kaňuchová, Z, Ioppolo, S, Herczku, P, Muiña, A Traspas, Field, TA, Hailey, PA, Juhász, Z, Kovács, STS, Mason, NJ, McCullough, RW, Pavithraa, S, Rahul, KK, Paripás, B, Sulik, B, Chou, SL, Lo, JI, Das, A, Cheng, BM, Rajasekhar, BN, Bhardwaj, A, and Sivaraman, B
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics ,Physics - Chemical Physics ,Physics - Space Physics - Abstract
The astrochemistry of CO2 ice analogues has been a topic of intensive investigation due to the prevalence of CO2 throughout the interstellar medium and the Solar System, as well as the possibility of it acting as a carbon feedstock for the synthesis of larger, more complex organic molecules. In order to accurately discern the physico-chemical processes in which CO2 plays a role, it is necessary to have laboratory-generated spectra to compare against observational data acquired by ground- and space-based telescopes. A key factor which is known to influence the appearance of such spectra is temperature, especially when the spectra are acquired in the infrared and ultraviolet. In this present study, we describe the results of a systematic investigation looking into: (i) the influence of thermal annealing on the mid-IR and VUV absorption spectra of pure, unirradiated CO2 astrophysical ice analogues prepared at various temperatures, and (ii) the influence of temperature on the chemical products of electron irradiation of similar ices. Our results indicate that both mid-IR and VUV spectra of pure CO2 ices are sensitive to the structural and chemical changes induced by thermal annealing. Furthermore, using mid-IR spectroscopy, we have successfully identified the production of radiolytic daughter molecules as a result of 1 keV electron irradiation and the influence of temperature over this chemistry. Such results are directly applicable to studies on the chemistry of interstellar ices, comets, and icy lunar objects and may also be useful as reference data for forthcoming observational missions., Comment: Published in the 'Journal of Molecular Spectroscopy'. Includes 40 pages, 7 figures, 2 tables, and a graphical abstract
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- 2022
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21. Early and Concurrent Home Stimulation: Unique and Indirect Links with Fine Motor Skills among 4-Year-Old Children in Rural Pakistan
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Armstrong-Carter, Emma, Sulik, Michael J., Siyal, Saima, Yousafzai, Aisha K., and Obradovic, Jelena
- Abstract
Fine motor skills enable children to make precise and coordinated movements with their hands and support their ability to engage in everyday activities and learning experiences. In a longitudinal study of 1,058 4-year-old children in rural Pakistan (n = 488 girls), we examined how prior and concurrent levels of home stimulation relate to change in fine motor skills from ages 2 to 4 while controlling for family wealth, maternal education, number of siblings at birth, prior and concurrent measures of children's physical growth and food insecurity, and prior motor skills at age 2. Moreover, we tested whether the association between early home stimulation and subsequent fine motor skills was mediated by physical growth, food insecurity, motor skills at age 2, and concurrent home stimulation. Results revealed that home stimulation at 18 months was positively associated with change in fine motor skills from ages 2 to 4, over and above family socioeconomic resources. This association was mediated by physical growth, food insecurity and motor skills at age 2. In contrast to home stimulation at 18 months, home stimulation at age 4 was positively associated with concurrent motor skills at age 4 when controlling for all antecedent family factors, as well as prior and concurrent measures of physical growth and food insecurity, and prior motor skills at age 2. Findings suggest that the preschool period may be an important window of time when physically and cognitively stimulating experiences at home uniquely relate to variability in fine motor development. [This article is published in "Developmental Psychology" (EJ1305482).]
- Published
- 2021
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22. A systematic mid-infrared spectroscopic study of thermally processed H2S ices
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Mifsud, Duncan V., Herczku, Péter, Ramachandran, Ragav, Sundararajan, Pavithraa, Rahul, K.K., Kovács, Sándor T.S., Sulik, Béla, Juhász, Zoltán, Rácz, Richárd, Biri, Sándor, Kaňuchová, Zuzana, Ioppolo, Sergio, Sivaraman, Bhalamurugan, McCullough, Robert W., and Mason, Nigel J.
- Published
- 2024
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23. Comparative analysis of the crystal structures of hydrates and sodium salts of monensin and its new C-26 succinate ester
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Jędrzejczyk, Marta, Janczak, Jan, Sulik, Michał, and Huczyński, Adam
- Published
- 2024
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24. Bystanders’ collective responses set the norm against hate speech
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Jimena Zapata, Justin Sulik, Clemens von Wulffen, and Ophelia Deroy
- Subjects
History of scholarship and learning. The humanities ,AZ20-999 ,Social Sciences - Abstract
Abstract Hate speech incidents often occur in social settings, from public transport to football stadiums. To counteract a prevailing passive attitude towards them, governmental authorities, sociologists, and philosophers stress bystanders’ responsibility to oppose or block hate speech. Here, across two online experiments with UK participants using custom visual vignettes, we provide empirical evidence that bystanders’ expression of opposition can affect how harmful these incidents are perceived, but only as part of a collective response: one expressed by a majority of bystanders present. Experiment 1 (N = 329) shows that the silence or intervention of three bystanders affects the harm caused by hate speech, but one bystander does not. Experiment 2 (N = 269) shows this is not simply a matter of numbers but rather one of norms: only unanimous opposition reduces the public perception of the damage created by the incident. Based on our results, we advance an empirical norm account: group responses to hate speech modulate its harm by indicating either a permissive or a disapproving social norm. Our account and results, showing the need to consider responses to hate speech at a collective level, have direct implications for social psychology, the philosophy of language and public policies.
- Published
- 2024
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25. Ivermectin and its synthetic derivatives – A new class of anticancer agents
- Author
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Sulik, Michał, Otto-Ślusarczyk, Dagmara, Antoszczak, Michał, Struga, Marta, and Huczyński, Adam
- Published
- 2024
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26. Universal Screening of Hunger, Tiredness, and Sickness: Implications for Kindergarten Readiness and Racial/Ethnic Disparities
- Author
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Steyer, Lily, Townley-Flores, Carrie, Sulik, Michael J., and Obradovic, Jelena
- Abstract
This study investigated associations of three teacher-reported health indicators--hunger, tiredness, and sickness--with kindergarten readiness skills in San Francisco Unified School District (N = 12,423; female = 48%; M[subscript age] = 5.47, SD[subscript age] = 0.30, range[subscript age] = 4.67--7.00; Asian American = 26%, Black = 5%, Latinx = 20%, Multiracial/Other = 23%, White = 18%). Research Findings: Accounting for demographic characteristics, each teacher-reported health indicator was negatively associated with measures of students' academic and social-emotional readiness. These relations did not differ by student race/ethnicity despite a disproportionately high prevalence of health concerns among Black and Latinx students relative to White students. Moreover, teacher-reported hunger, tiredness, and sickness partially explained racial/ethnic disparities in kindergarten readiness skills, especially among Black students compared to their White, Latinx, and Asian American peers. Practice or Policy: Results demonstrate the feasibility and utility of universal teacher-administered basic health screening and underscore the importance of early childhood health for efforts to redress educational inequality.
- Published
- 2023
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27. Electron Irradiation and Thermal Chemistry Studies of Interstellar and Planetary Ice Analogues at the ICA Astrochemistry Facility
- Author
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Mifsud, Duncan V., Juhász, Zoltán, Herczku, Péter, Kovács, Sándor T. S., Ioppolo, Sergio, Kanuchová, Zuzana, Czentye, Máté, Hailey, Perry A., Muina, Alejandra Traspas, Mason, Nigel J., McCullough, Robert W., Paripás, Béla, and Sulik, Béla
- Subjects
Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
The modelling of molecular excitation and dissociation processes relevant to astrochemistry requires the validation of theories by comparison with data generated from laboratory experimentation. The newly commissioned Ice Chamber for Astrophysics-Astrochemistry (ICA) allows for the study of astrophysical ice analogues and their evolution when subjected to energetic processing, thus simulating the processes and alterations interstellar icy grain mantles and icy outer Solar System bodies undergo. ICA is an ultra-high vacuum compatible chamber containing a series of IR-transparent substrates upon which the ice analogues may be deposited at temperatures of down to 20 K. Processing of the ices may be performed in one of three ways: (i) ion impacts with projectiles delivered by a 2 MV Tandetron-type accelerator, (ii) electron irradiation from a gun fitted directly to the chamber, and (iii) thermal processing across a temperature range of 20-300 K. The physico-chemical evolution of the ices is studied in situ using FTIR absorbance spectroscopy and quadrupole mass spectrometry. In this paper, we present an overview of the ICA facility with a focus on characterising the electron beams used for electron impact studies, as well as reporting the preliminary results obtained during electron irradiation and thermal processing of selected ices., Comment: Published in European Physical Journal Part D: Atomic, Molecular, Optical, and Plasma Physics
- Published
- 2021
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28. The Ice Chamber for Astrophysics-Astrochemistry (ICA): A New Experimental Facility for Ion Impact Studies of Astrophysical Ice Analogues
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Herczku, Péter, Mifsud, Duncan V., Ioppolo, Sergio, Juhász, Zoltán, Kanuchová, Zuzana, Kovács, Sándor T. S., Muina, Alejandra Traspas, Hailey, Perry A., Rajta, István, Vajda, István, Mason, Nigel J., McCullough, Robert W., Paripás, Béla, and Sulik, Béla
- Subjects
Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
The Ice Chamber for Astrophysics-Astrochemistry (ICA) is a new laboratory end-station located at the Institute for Nuclear Research (Atomki) in Debrecen, Hungary. The ICA has been specifically designed for the study of the physico-chemical properties of astrophysical ice analogues and their chemical evolution when subjected to ionising radiation and thermal processing. The ICA is an ultra-high vacuum compatible chamber containing a series of IR-transparent substrates mounted in a copper holder connected to a closed-cycle cryostat capable of being cooled down to 20 K, itself mounted on a 360{\deg} rotation stage and a z-linear manipulator. Ices are deposited onto the substrates via background deposition of dosed gases. Ice structure and chemical composition are monitored by means of FTIR absorbance spectroscopy in transmission mode, although use of reflectance mode is possible by using metallic substrates. Pre-prepared ices may be processed in a variety of ways. A 2 MV Tandetron accelerator is capable of delivering a wide variety of high-energy ions into the ICA, which simulates ice processing by cosmic rays, the solar wind, or magnetospheric ions. The ICA is also equipped with an electron gun which may be used for electron impact radiolysis of ices. Thermal processing of both deposited and processed ices may be monitored by means of both FTIR spectroscopy and quadrupole mass spectrometry. In this paper, we provide a detailed description of the ICA set-up, as well as an overview of preliminary results obtained and future plans., Comment: Published in Review of Scientific Instruments
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- 2021
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29. Forest ecosystem on the edge: Mapping forest fragmentation susceptibility in Tuchola Forest, Poland
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Sanjana Dutt, Amit Kumar Batar, Sławomir Sulik, and Mieczysław Kunz
- Subjects
Forest fragmentation ,Ecosystem integrity ,Remote sensing ,Susceptibility mapping ,Wind storm ,Ecology ,QH540-549.5 - Abstract
Forest ecosystems, vital for maintaining global biodiversity and ecological balance, are increasingly threatened by fragmentation. This study addresses the critical issue in the Tuchola Forest of Poland, examining the effects of natural and human factors on forest fragmentation. Our objective was to identify the most suitable dataset for monitoring forest fragmentation from 2015 to 2020, ascertain the primary drivers of fragmentation, and map the areas at high risk. Utilizing the PALSAR (25 m resolution) and Dynamic World (10 m resolution) datasets, we discovered PALSAR's enhanced ability to detect changes in forest structure, particularly evident after a significant windstorm in 2017. This dataset proved crucial in highlighting the escalating trend of forest fragmentation, reinforcing its importance for environmental monitoring and policy formulation. Our analysis identified key factors influencing fragmentation, such as proximity to croplands, tree height and age, wind speed, and vegetation water content, with areas near croplands and having younger, shorter trees being most susceptible. Employing a Weight-of-Evidence (WOE) Bayesian modeling technique, we mapped forest fragmentation susceptibility, demonstrating our methodology's effectiveness through high accuracy validation (AUC of 0.82 and Kappa Index of 0.68). Our innovative approach in mapping susceptibility to fragmentation, especially after extreme weather events, marks a pioneering contribution in Poland. This research advances the understanding of forest fragmentation dynamics and offers a scalable model for global application, emphasizing the urgent need for targeted conservation strategies to preserve the integrity of forest ecosystems amidst climatic risk and anthropogenic pressures.
- Published
- 2024
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30. Analysis of serum levels of interleukin-18 in the acute and past infection of mononucleosis in children
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Katarzyna Leszko, Kacper Toczyłowski, Eryk Latoch, Artur Sulik, and Beata Żelazowska-Rutkowska
- Subjects
mononucleosis ,interleukin‑18 ,acute and past phase ,Pediatrics ,RJ1-570 - Published
- 2023
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31. Forest ecosystem on the edge: Mapping forest fragmentation susceptibility in Tuchola Forest, Poland
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Dutt, Sanjana, Kumar Batar, Amit, Sulik, Sławomir, and Kunz, Mieczysław
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- 2024
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32. Modeling the associations between socioeconomic risk factors, executive function components, and reading among children in rural Côte d’Ivoire
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Khan, Faryal, Wortsman, Brooke, Whitehead, Hannah L., Hannon, Joelle, Aurora, Medha, Sulik, Michael J., Tanoh, Fabrice, Akpe, Hermann, Ogan, Amy, Obradović, Jelena, and Jasińska, Kaja K.
- Published
- 2024
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33. Sulphur ion implantation into O2, CO, and CO2 ices: Implications for the formation of sulphur-bearing molecules in the Kuiper Belt
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Mifsud, Duncan V., Kaňuchová, Zuzana, Herczku, Péter, Juhász, Zoltán, Kovács, Sándor T.S., Lakatos, Gergő, Rahul, K.K., Rácz, Richárd, Sulik, Béla, Biri, Sándor, Rajta, István, Vajda, István, Ioppolo, Sergio, McCullough, Robert W., and Mason, Nigel J.
- Published
- 2024
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34. Sulfur Ice Astrochemistry: A Review of Laboratory Studies
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Mifsud, Duncan V., Kanuchova, Zuzana, Herczku, Peter, Ioppolo, Sergio, Juhasz, Zoltan, Kovacs, Sandor T. S., Mason, Nigel J., McCullough, Robert W., and Sulik, Bela
- Subjects
Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Sulfur is the tenth most abundant element in the universe and is known to play a significant role in biological systems. Accordingly, in recent years there has been increased interest in the role of sulfur in astrochemical reactions and planetary geology and geochemistry. Among the many avenues of research currently being explored is the laboratory processing of astrophysical ice analogues. Such research involves the synthesis of an ice of specific morphology and chemical composition at temperatures and pressures relevant to a selected astrophysical setting (such as the interstellar medium or the surfaces of icy moons). Subsequent processing of the ice under conditions that simulate the selected astrophysical setting commonly involves radiolysis, photolysis, thermal processing, neutral-neutral fragment chemistry, or any combination of these, and has been the subject of several studies. The in-situ changes in ice morphology and chemistry occurring during such processing has been monitored via spectroscopic or spectrometric techniques. In this paper, we have reviewed the results of laboratory investigations concerned with sulfur chemistry in several astrophysical ice analogues. Specifically, we review (i) the spectroscopy of sulfur-containing astrochemical molecules in the condensed phase, (ii) atom and radical addition reactions, (iii) the thermal processing of sulfur-bearing ices, (iv) photochemical experiments, (v) the non-reactive charged particle radiolysis of sulfur-bearing ices, and (vi) sulfur ion bombardment of and implantation in ice analogues. Potential future studies in the field of solid phase sulfur astrochemistry are also discussed in the context of forthcoming space missions, such as the NASA James Webb Space Telescope and the ESA Jupiter Icy Moons Explorer mission., Comment: Peer-reviewed version accepted for publication in Space Science Reviews
- Published
- 2021
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35. Attitudes towards the Tick-Borne Encephalitis Vaccine among Children’s Guardians: A Cross-Sectional Survey Study in Poland
- Author
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Furkan Ates, Marta Dyszkiewicz, Julia Witkiewicz, Kacper Toczylowski, Dawid Lewandowski, and Artur Sulik
- Subjects
tick-borne encephalitis ,vaccination ,survey ,attitudes ,risk perception ,health knowledge ,Medicine - Abstract
This cross-sectional survey study aimed to assess the attitudes and knowledge of children’s guardians in Poland towards tick-borne encephalitis (TBE) and its vaccine, as well as to compare these attitudes to those regarding other infectious diseases and their vaccines. Data were collected through anonymous questionnaires, both paper-based and online, from 3030 respondents across Poland, with the majority being from TBE-endemic areas. The survey included questions on demographic characteristics, general vaccination beliefs, and specific perceptions of TBE and its vaccine. Statistical analysis revealed significant associations between willingness to vaccinate against TBE and factors such as general vaccination attitudes, information sources, vaccine safety ratings, and perceptions of disease severity. Results indicated that guardians from larger cities and those with fewer children were more likely to vaccinate. Additionally, parents who supported general vaccinations were significantly more willing to vaccinate against TBE. The study concludes that enhancing public awareness about the safety and importance of the TBE vaccine, especially in endemic regions, is crucial for improving vaccination rates. Targeted public health interventions addressing misconceptions and providing accurate information are essential strategies to increase TBE vaccine uptake and protect children from this serious disease.
- Published
- 2024
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36. Intensified Circulation of Echovirus 11 after the COVID-19 Pandemic in Poland: Detection of a Highly Pathogenic Virus Variant
- Author
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Beata Gad, Paulina Kłosiewicz, Kinga Oleksiak, Arleta Krzysztoszek, Kacper Toczyłowski, Artur Sulik, Tobiasz Wieczorek, and Magdalena Wieczorek
- Subjects
echovirus 11 ,phylogenetic analysis ,environmental surveillance ,enterovirus ,epidemiology ,aseptic meningitis ,Microbiology ,QR1-502 - Abstract
After the first phase of the COVID-19 pandemic in Europe, a new highly pathogenic variant of echovirus 11 (E11) was detected. The aim of this study was to analyze the genetic diversity of Polish E11 environmental and clinical strains circulating between 2017 and 2023 as well as compare them with E11 strains isolated from severe neonatal sepsis cases reported in Europe between 2022 and 2023. Additionally, the study explores the effectiveness of environmental monitoring in tracking the spread of new variants. For this purpose, the complete sequences of the VP1 capsid protein gene were determined for 266 E11 strains isolated in Poland from 2017 to 2023, and phylogenetic analysis was performed. In the years 2017–2023, a significant increase in the detection of E11 strains was observed in both environmental and clinical samples in Poland. The Polish E11 strains represented three different genotypes, C3, D5 and E, and were characterized by a high diversity. In Poland, the intensive circulation of the new variant E11, responsible for severe neonatal infections with a high mortality in Europe, was detected in the years 2022–2023. This investigation demonstrates the important role of environmental surveillance in the tracking of enteroviruses circulation, especially in settings with limited clinical surveillance.
- Published
- 2024
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37. Anion Creation in Ion—Molecule Collisions in the Solar Wind Energy Region
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Juhász, Z., Sulik, B., Lattouf, E., Bene, E., Huber, B. A., Herczku, P., Kovács, S. T. S., Méry, A., Poully, J.-C., Rangama, J., Tanis, J. A., Vizcaino, V., Chesnel, J.-Y., Mennella, Vito, editor, and Joblin, Christine, editor
- Published
- 2023
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38. Executive Function Mediates the Association between Cumulative Risk and Learning in Ghanaian Schoolchildren
- Author
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Suntheimer, Noelle M., Wolf, Sharon, Sulik, Michael J., Avornyo, Esinam Ami, and Obradovic, Jelena
- Abstract
Research on the associations among adversity, executive function (EF), and academic outcomes in low- and middle-income countries, where developmental risk factors are more prevalent and impoverished environments are more widespread than in high income countries, is sparse. This study examines the relations among cumulative risk, EF, and learning outcomes measured 2-years later in Ghanaian third- and fourth-graders (N = 371; 49% female), shedding light on underlying mechanisms of how risk can undermine learning. A cumulative risk index was created based on a set of four child-reported risk factors: home aggression, unsafe home neighborhood, hunger, and having worked for pay. Cumulative risk and EF were negatively correlated. Learning outcomes (literacy and math test scores) were negatively correlated with earlier measures of cumulative risk and positively correlated with earlier measures of EF. EF mediated the association between cumulative risk and later learning outcomes, accounting for 65.3% of the total effect for literacy and 100% for math. This mediated pathway was robust to controls for child and household sociodemographic characteristics. The findings contribute to a small evidence base on the mediating role of EF in linking adversity and learning outcomes in a global context. [For the grantee submission, see ED622175.]
- Published
- 2022
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39. Peers Matter: Links between Classmates' and Individual Students' Executive Functions in Elementary School
- Author
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Finch, Jenna E., Garcia, Elisa B., Sulik, Michael J., and Obradovic, Jelena
- Abstract
Students' executive functions (EFs) are linked to school success. Although school-age children spend much of their time interacting with peers, few studies have explored how children's classmates may promote EF development in elementary school. In this study, we test whether mean levels and variability in classmates' EF skills are associated with growth in individual students' accuracy and speed on EF tasks among third, fourth, and fifth graders (N = 806). We find that classmates' speed, but not accuracy, on EF tasks is linked to significant improvements in individual students' EFs over the school year. Classmates' average EFs, as indexed by faster accurate responses on EF tasks, are associated with improvements in individual students' speed on EF tasks. These results were robust to the inclusion of individual students' general processing speed. In contrast, variability in classmates' accuracy and speed on EF tasks was not associated with individual students' EF growth. Our results highlight the role of peers and the school context for EF development in middle childhood.
- Published
- 2019
40. Unexpected rearrangement of ivermectin in the synthesis of new derivatives with trypanocidal and antiplasmodial activities
- Author
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Sulik, Michał, Fontinha, Diana, Steverding, Dietmar, Sobczak, Szymon, Antoszczak, Michał, Prudêncio, Miguel, and Huczyński, Adam
- Published
- 2024
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41. Comparison of thunderstorm days in Poland based on SYNOP reports and PERUN lightning detection system
- Author
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Sulik Sławomir and Kejna Marek
- Subjects
thunderstorm ,thunderstorm day ,lightning ,perun, synop ,poland ,Geography (General) ,G1-922 - Abstract
The research presents a comparison between two methods which are used to identify days on which there are thunderstorms (TDs) in Poland. SYNOP and PERUN lightning network data from the Institute of Meteorology and Water Management (IMGW-PIB) for the period 2002–2020 were used to determine and compare the changes in the number of TDs. To determine the number of TDs using the PERUN data, an appropriate method needed to be created which would allow for the closest possible reference to human perception in relation to lightning. A buffer with a radius of 15 km was used, and TDs were counted when there was at least one flash within the buffer circle. Measurements performed by observers are sometimes not homogeneous and are prone to errors, and thus underestimate the actual number of TDs. As a result of the analysis, the average number of TDs in Poland was found to be 26 (SYNOP) and 30 (PERUN) per year.
- Published
- 2023
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42. Antiparasitic activity of ivermectin: Four decades of research into a “wonder drug”
- Author
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Sulik, Michał, Antoszczak, Michał, Huczyński, Adam, and Steverding, Dietmar
- Published
- 2023
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43. Control-IQ Technology Use in Individuals With High Insulin Requirements: Results From the Multicenter Higher-IQ Trial.
- Author
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Carlson, Anders L., Graham, Timothy E., Akturk, Halis K., Liljenquist, David R., Bergenstal, Richard M., Sulik, Becky, Shah, Viral N., Sulik, Mark, Zhao, Peter, Briggs, Peter, Sassan-Katchalski, Ravid, and Pinsker, Jordan E.
- Published
- 2024
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44. Varicella-Zoster Disease of the Central Nervous System in Immunocompetent Children: Case Series and a Scoping Review.
- Author
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Lewandowski, Dawid, Toczylowski, Kacper, Kowalska, Malgorzata, Krasnodębska, Milena, Krupienko, Iryna, Nartowicz, Karolina, Sulik, Magdalena, and Sulik, Artur
- Subjects
CENTRAL nervous system diseases ,HOSPITAL care of children ,SYMPTOMS ,VARICELLA-zoster virus ,VIRAL vaccines - Abstract
Background: Varicella-Zoster Virus (VZV) is characterized by its ability to enter a dormant state within the body. When the wild or vaccine virus reactivates, it can lead to herpes zoster (HZ), which infrequently manifests as a neuroinfection. Objectives: The aim of the study was to analyze the clinical manifestations and outcomes associated with VZV reactivation in the CNS in immunocompetent children. Methods: We searched medical databases for case reports using the keywords "zoster", "meningitis", "encephalitis", and "immunocompetent". The inclusion criteria were age below 18 years, any gender, race, and ethnicity, no features or history of immunodeficiency, and confirmation of VZV reactivation through the detection of VZV DNA in the CSF. Patients were categorized into two groups: children experiencing the reactivation of the wild virus and children with the vaccine strain virus. Results: The cohort included six children hospitalized in our hospital and 49 children reported in the literature. In 37 (67%), a wild-type virus was detected, while in 18 (33%), an infection was caused by the vaccine strain. There were no differences in the clinical presentation between the two groups. A typical rash was observed in 32 (58%) children. Approximately 41 of the 55 children (75%) received antiviral treatment. Four patients experienced complications. Conclusions: Neither a history of VZV immunization nor the absence of a skin rash can definitively exclude VZV meningitis. It is important to note that any seemingly healthy child, regardless of recognized risk factors, could develop HZ meningitis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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45. Associations of the cerebrospinal fluid lymphocyte population with a clinical presentation of tick-borne encephalitis
- Author
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Grygorczuk, Sambor, Osada, Joanna, Sulik, Artur, Toczyłowski, Kacper, Dunaj-Małyszko, Justyna, Czupryna, Piotr, Adamczuk, Justyna, and Moniuszko-Malinowska, Anna
- Published
- 2023
- Full Text
- View/download PDF
46. Tolerance to failure unleashes the benefits of cognitive diversity in collective problem solving
- Author
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Sulik, Justin, Bahrami, Bahador, and Deroy, Ophelia
- Subjects
cognitive science - Abstract
Collective problem solving is supposed to benefit from cognitive diversity (e.g., when a team consists of individuals with different learning strategies). However, recent evidence for this claim fails to rule out an alternative explanation: that the benefit is due to moderate non-conformity, not diversity. We extend a previous agent-based simulation to distinguish these hypotheses, and demonstrate that diverse learning strategies alone do not yield the expected benefit. We extend the model further, based on an idea from the philosophy of science: Group-level benefits in complex problem solving often entail individual-level failures. Accordingly, we parameterize tolerance for failure, and show that there is an interaction between tolerance for failure and diversity. When tolerance for failure is zero, heterogeneous and homogeneous groups perform equally; when non-zero, diverse groups can outperform heterogeneous groups. Our agent-based simulations help clarify when cognitive diversity benefits collective problem solving.
- Published
- 2021
47. Studying science denial with a complex problem-solving task
- Author
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Sulik, Justin and McKay, Ryan
- Subjects
cognitive science - Abstract
Explanations of science denial rooted in individual cognition tend to focus on general trait-like factors such as cognitive style, conspiracist ideation or delusional ideation. However, we argue that this focus typically glosses over the concrete, mechanistic elements of belief formation, such as hypothesis generation, data gathering, or hypothesis evaluation. We show, empirically, that such elements predict variance in science denial not accounted for by cognitive style, even after accounting for social factors such as political ideology. We conclude that a cognitive account of science denial would benefit from the study of complex (i.e., open-ended, multi-stage) problem solving that incorporates these mechanistic elements.
- Published
- 2021
48. Fire Resistance of Foamed Concrete for Discontinuous Partition Filling
- Author
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Paweł Sulik, Bożena Kukfisz, Adriana Dowbysz, and Agata Oszczak-Nowińska
- Subjects
foam concrete ,density ,insulating fire temperatures ,fire resistance ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Lightweight concrete exhibits many advantages over traditional concrete such as lower density and thermal conductivity and an easier, cheaper, less energy-consuming manufacturing process. In order to extend its applications, there is a need to study its behavior in fire situations. Due to that, the aim of this study was to assess the fire resistance of foam concrete, depending on its thickness and the foaming process applied. Fire resistance was assessed according to EN 1363-1. The results indicate the usefulness of foam concrete in terms of isolating fire temperatures for discontinuous partition filling that are consequently a real alternative to dedicated solutions in the field of passive fire protection. The density of foam concrete was shown to have a large effect on the ability to insulate fire temperatures with a standard material preparation process. It was also noted that changing the method to continuous foam feeding may result in the achievement of similar values while maintaining foam concrete low density.
- Published
- 2024
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49. Raman–Infrared Spectral Correlation of an Artificially Space-Weathered Carbonaceous Chondrite Meteorite
- Author
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Ildiko Gyollai, Sándor Biri, Zoltán Juhász, Csilla Király, Richárd Rácz, Dániel Rezes, Béla Sulik, Máté Szabó, Zoltán Szalai, Péter Szávai, Tamás Szklenár, and Ákos Kereszturi
- Subjects
FTIR reflectance spectroscopy ,Raman spectroscopy ,meteorites ,chondrites ,irradiation ,space weathering ,Mineralogy ,QE351-399.2 - Abstract
Raman and infrared measurements of the same locations were conducted on a northwest African (NWA) 10580 CO3 meteorite sample, before and after three proton irradiations (1 keV ion energy using 1011, 1014, and 1017 ion/cm2 fluent values), to simulate space weathering effects. In the case of Raman spectroscopy, both FWHM and peak positions of the major olivine and pyroxene bands changed after the irradiation, and the minor bands disappeared. In the FTIR spectra, the minor bands of olivine and pyroxene also disappeared; meanwhile, major IR bands of pyroxene remained visible, demonstrating both positive and negative peak shifts, and the olivines were characterised only by negative peak shifts. The olivines were characterised by negative FWHM changes for major bands, but positive FWHM changes for minor bands. The pyroxenes were characterised by elevated FWHM changes for minor bands after the irradiation. The disappearance of minor bands both of IR and Raman spectra indicates the amorphization of minerals. The negative peak shift in IR spectra indicates Mg loss for olivine and pyroxene, in agreement with the literature. The Raman spectra are characterised by positive peak shift and positive FWHM changes; the IR spectra are characterised by a negative peak shift. The Mg loss, which was detected by negative peak shifts of FTIR bands, may be caused by distortion of the crystal structure, which could be detected by a positive peak shift in Raman spectra. This joint observation and interpretation has not been formulated in the literature, but indicates further possibilities in the confirmation of mineral changes by different instruments. Shock alteration-based observations by other researchers could be used as a reference for irradiation experiments as irradiation makes a similar structural alteration, like a low-grade shock metamorphism.
- Published
- 2024
- Full Text
- View/download PDF
50. Associations of the cerebrospinal fluid lymphocyte population with a clinical presentation of tick-borne encephalitis
- Author
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Sambor Grygorczuk, Joanna Osada, Artur Sulik, Kacper Toczyłowski, Justyna Dunaj-Małyszko, Piotr Czupryna, Justyna Adamczuk, and Anna Moniuszko-Malinowska
- Subjects
Tick-borne encephalitis ,Pleocytosis ,Lymphocytes ,Intrathecal immune response ,Infectious and parasitic diseases ,RC109-216 - Abstract
In tick-borne encephalitis (TBE), lymphocytes infiltrating central nervous system are indispensable for the infection control, but also potentially immunopathogenic. To clarify their roles, we have evaluated cerebrospinal fluid (CSF) count of the main lymphocyte populations (considered as a proxy of the brain parenchyma lymphocytic infiltrate) in TBE patients and analyzed if they associate with clinical presentation, blood-brain barrier disruption and intrathecal antibody synthesis.We have studied CSF from 96 adults with TBE (50 with meningitis, 40 with meningoencephalitis, 6 with meningoencephalomyelitis), 17 children and adolescents with TBE and 27 adults with non-TBE lymphocytic meningitis. Th CD3+CD4+, Tc CD3+CD8+, double positive T CD3+CD4+CD8+, B CD19+ and NK CD16+/56+ cells were counted cytometrically with a commercial fluorochrome-stained monoclonal antibody set. The associations between the counts and fractions of these cells and clinical parameters were analyzed with non-parametric tests, p
- Published
- 2023
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