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Substrate control in track registration and preservation:insights across the Triassic—Jurassic boundary in southern Africa

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Journal of Palaeogeography 2024年第2期13卷 351-371页

作者： Loyce mpangala miengah Abrahams emese m.bordy Department of Geological Sciences University of Cape TownCape TownSouth Africa

Tracks registration is influenced by the dynamic interplay between the pedal anatomy of the trackmaker,its behaviour,and the substrate conditions it interacts with.Differences in substrate conditions,especially those linked to grain size and moisture content,often result in the most dramatic variations in track morphology.In the upper Stormberg Group,main Karoo Basin of southern Africa,diverse trace fossils,primarily comprising Late Triassic—Early Jurassic dinosaur tracks,are preserved.Numerous studies have extensively documented individual ichnosites,investigating variations between sites over time,with recent studies suggesting that track abundance and anatomical fidelity increase up-stratigraphy.Despite the well-established link between substrate and track morphology,past studies have not specifically focused on substrate conditions,often emphasizing macro-sedimentary features instead.Here,we examine the micro-sedimentary features of track-bearing units in the upper Stormberg Group using petrographic techniques to better understand the palaeosubstrate and its effect on fossil track registration and preservation.The analysis revealed that very fine-grained sandstones and substrates modified by microbial activity tend to preserve tracks with greater abundance and/or higher anatomical fidelity.Furthermore,the prevalence of very fine-grained and microbially modified strata,and their associated track trends increases in younger stratigraphic units.Across the Triassic—Jurassic boundary in southern Africa,a boom in dinosaur track abundances is observed and credited to the proliferation of dinosaur populations during the Early Jurassic.Our findings,however,suggest that the observed local increase in track abundance(and anatomical fidelity)up-stratigraphy may be linked to substrate composition differences,which were ultimately controlled by large-scale changes in the palaeoenvironment from high-energy meandering fluvial to lower-energy aeolian-lacustrine settings in the Late Triassic and Early Jurassic,respectively.The

关键词： Dinosaur tracks Footprint anatomical fidelity micro-sedimentary features Substrate conditions Track registration Palaeoenvironmental context

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One in four patients with gastrointestinal bleeding develops shock or hemodynamic instability:A systematic review and meta-analysis

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World Journal of Gastroenterology 2023年第28期29卷 4466-4480页

作者： mahmoud Obeidat Brigitta Teutsch Anett Rancz Edina Tari Katalin márta Dániel Sándor Veres Nóra Hosszúfalusi emese mihály Péter Hegyi Bálint Erőss Centre for Translational medicine Semmelweis UniversityBudapest 1085Hungary Institute for Translational medicine Medical SchoolUniversity of PécsPécs 7623Hungary Department of Internal medicine and Hematology Semmelweis UniversityFaculty of MedicineBudapest 1085Hungary Institute of Pancreatic Diseases Semmelweis UniversityBudapest 1083Hungary Department of Biophysics and Radiation Biology Semmelweis UniversityBudapest 1085Hungary

BACKGROUND Hemodynamic instability and shock are associated with untoward outcomes in gastrointestinal bleeding.However,there are no studies in the existing literature on the proportion of patients who developed these outcomes after gastrointestinal bleeding.AIm To determine the pooled event rates in the available literature and specify them based on the bleeding source.mETHODS The protocol was registered on PROSPERO in advance(CRD42021283258).A systematic search was performed in three databases(Pubmed,EmBASE,and CENTRAL)on 14^(th) October 2021.Pooled proportions with 95%CI were calculated with a random-effects model.A subgroup analysis was carried out based on the time of assessment(on admission or during hospital stay).Heterogeneity was assessed by Higgins and Thompson’s I^(2) statistics.The Joanna Briggs Institute Prevalence Critical Appraisal Tool was used for the risk of bias assessment.The Reference Citation Analysis(https://***/)tool was applied to obtain the latest highlight articles.RESULTS We identified 11589 records,of which 220 studies were eligible for data extraction.The overall proportion of shock and hemodynamic instability in general gastrointestinal bleeding patients was 0.25(95%CI:0.17-0.36,I^(2)=100%).In non-variceal bleeding,the proportion was 0.22(95%CI:0.14-0.31,I^(2)=100%),whereas it was 0.25(95%CI:0.19-0.32,I^(2)=100%)in variceal bleeding.The proportion of patients with colonic diverticular bleeding who developed shock or hemodynamic instability was 0.12(95%CI:0.06-0.22,I^(2)=90%).The risk of bias was low,and heterogeneity was high in all analyses.CONCLUSION One in five,one in four,and one in eight patients develops shock or hemodynamic instability on admission or during hospitalization in the case of non-variceal,variceal,and colonic diverticular bleeding,respectively.

关键词： Gastrointestinal bleeding Hemodynamic instability Shock meta-analysis Statistics Review

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The potential application of red mud and soil mixture as additive to the surface layer of a landfill cover system

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Journal of Environmental Sciences 2016年第6期28卷 189-196页

作者： Eva Ujaczki Viktória Feigl mónika molnár emese Vaszita Nikolett Uzinger Attila Erdélyi Katalin Gruiz Department of Applied Biotechnology and Food Science Faculty of Chemical Technology and Biotechnology Budapest University of Technology and Economics H-1111 Budapest Muegyetem rkp. 3 Hungar Institute for Soil Sciences and Agricultural Chemistry Centre for Agricultural Research Hungarian Academy of Sciences H-1022 Budapest Herman Otto Street 15 Hungary A.S.A. Hungary Ltd. H-2360 Gydl Karosi Street 53 Hungary

Red mud, the by-product of aluminum production, has been regarded as a problematic residue all over the world. Its storage involves risks as evidenced by the Ajka red mud spill,an accident in Hungary where the slurry broke free, flooding the surrounding areas. As an immediate remediation measure more than 5 cm thick red mud layer was removed from the flooded soil surface. The removed red mud and soil mixture（RmSm） was transferred into the reservoirs for storage. In this paper the application of RmSm is evaluated in a field study aiming at re-utilizing waste, decreasing cost of waste disposal and providing a value-added product. The purpose was to investigate the applicability of RmSm as surface layer component of landfill cover systems. The field study was carried out in two steps： in lysimeters and in field plots. The RmSm was mixed at ratios ranging between 0 and 50% w/w with low quality subsoil（LQS） originally used as surface layer of an interim landfill cover. The characteristics of the LQS ＋ RmSm mixtures compared to the subsoil（LQS） and the RmSm were determined by physical–chemical, biological and ecotoxicological methods. The addition of RmSm to the subsoil（LQS） at up to 20% did not result any ecotoxic effect, but it increased the water holding capacity. In addition, the microbial substrate utilization became about triple of subsoil（LQS） after 10 months. According to our results the RmSm mixed into subsoil（LQS） at20% w/w dose may be applied as surface layer of landfill cover systems.

关键词： Red mud Soil amelioration Environmental toxicology Landfill cover constituent Field-study Lysimeter

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Preparation of sulfur hydrophobized plasmonic photocatalyst towards durable superhydrophobic coating material

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Journal of materials Science & Technology 2020年第6期41卷 159-167页

作者： emese Lantos Lászlómérai ágota Deák Juan Gómez-Pérez Dániel Sebo?k Imre Dékány Zoltán Kónya LászlóJanovák University of Szeged Interdisciplinary Excellence CentreDepartment of Physical Chemistry and Materials ScienceH-6720Rerrich Béla tér 1SzegedHungary University of Szeged Interdisciplinary Excellence CentreDepartment of Applied and Environmental ChemistryH-6720Rerrich Béla tér 1SzegedHungary

The widely used photocatalytic self-cleaning coating materials are often made of polymers and polymer based composites,where the photocatalyst immobilization occurs with macromolecules.However,these organic polymers are often unstable under exposure to UV irradiation and easily degraded by reactive radicals produced in the photocatalytic reaction.In order to solve this problem,in this paper,we present the facile preparation of a multifunctional coating with dual superhydrophobic and photocatalytic properties,where the fixation and the hydrophobization of the plasmonic Ag-TiO2 photocatalyst particles with visible light activity was performed with non-water soluble sulfur,which is a cheap and easily available material.The resulted novel nanocomposite with rough and nano-tructured surface roughness(1.25–2.45 nm determined by small-angle X-ray scattering)has sufficient low surface energy(3.3 mJ/m2)for superhydrophobic(θ=151.1°v)properties.moreover,in contrast of the organic and expensive fluoropolymer based composites,this non-wetting nature was durable,because the measured was higher than 150°during the long-term LED(λmax=405 nm)light irradiation.

关键词： Nanocomposite Coating materials Wetting Lotus-type structure Visible light photocatalyst

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