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suspect and non-targeted screening of chemical pollutants in Botswana's aquatic environments

emerging Contaminants 2024年第3期10卷 363-373页

作者： Kgato P.selwe Charlotte R.Head Gothatamang N.Phokedi Je.s.e.T.Ande.s.n J.Brett sallach Caroline e.H.De.s.nt Department of Chemistry University of YorkHeslingtonYorkUnited Kingdom Department of environment and Geography University of YorkHeslingtonYorkUnited Kingdom Department of Biology University of YorkHeslingtonYorkUnited Kingdom Department of Chemical and Fore.s.c sciences Botswana International University of Science and TechnologyBotswana

Chemical pollution in the aquatic syste.s.of Botswana has been sparsely studied despite its potential ecological ***,we perform a study of water samples collected from 13 locations distributed across Botswana to obtain the first overview of the nature and distribution of chemical contaminants across the country's aquatic *** resolution mass spectrometry was applied using nontargeted and suspect screening methods to qualitatively analyse.s.mples.A total of 114 contaminants of emerging concern(Ce.s.were identified including 68(59.6%)pharmaceuticals and pharmaceutical metabolites;16(14.2%)pesticides;13(11.4%)psychoactive compounds and metabolites;11(9.7%)industrial chemicals and intermediates and lastly,5(4.4%)pe.s.nal care ***,3,4-dimethylmethcathinone,and diazolidinyl urea represented the most commonly detected pharmaceutical,psychoactive drug and pe.s.nal care product,*** pesticide dodemorph and three industrial chemicals(stearamide,pthalic acid and bis(2-ethylhexyl)phthalate)were detected in all samples obtained.90 Ce.s.were detected in receiving water(from 7 sample locations),75 in wastewater(from 3 sample locations)and 60 in surface water(from 9 sample locations).Of the compounds detected,only 8 had been identified in environmental samples acquired in Botswana *** discuss the variations in the nature and frequency of chemical pollutants detected in this work in a geographical *** results indicate that Botswana's aquatic syste.s.are.s.bject to pollution,despite wastewater treatment and that in order to mitigate potentially harmful effects on both human and aquatic ecosyste.s.more investigations are required to correctly identify,track and tackle the.s.urces of pollution.

关键词： emerging contaminants Chemical pollution Water analysis Pharmaceuticals LC-HRMs/Ms

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Machine learning-enhanced Monte Carlo and subset simulations for advanced risk asse.s.ent in transportation infrastructure

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Journal of Mountain science 2024年第2期21卷 690-717页

作者： Furquan AHMAD Pijush sAMUI s.s.MIsHRA Department of Civil engineering National Institute of TechnologyPatna 800006India

The maintenance of safety and dependability in rail and road embankments is of utmost importance in order to facilitate the.s.ooth operation of transportation *** study introduces a comprehe.s.ve methodology for soil slope.s.ability evaluation,employing Monte Carlo simulation(MCs)and subset simulation(ss)with the"UPss 3.0 Add-in"in *** on an 11.693-meter embankment with a soil slope(inclination ratio of 2H:1V),the investigation conside.s.earthquake coefficients(kh)and pore water pre.s.re ratios(ru)following Indian zoning *** chance of slope failure.s.owed a considerable incre.s. as the Coefficient of Variation(COV),se.s.ic coefficients(kh),and pore water pre.s.re ratios(ru)experienced an *** ss approach showed exceptional efficacy in calculating odds of failure that are notably *** computational modeling,the.s.udy optimized the worst-case.s.enario using ANFIs-GA,ANFIs-GWO,ANFIs-PsO,and ANFIs-BBO *** ANFIs-PsO model exhibits exceptional accuracy(training R2=0.9011,RMse=0.0549;testing R2=0.8968,RMse=0.0615),emerging as the most *** study highlights the.s.gnificance of conducting thorough risk asse.s.ents and offe.s.practical insights into evaluating and improving the.s.ability of soil slopes in transportation *** findings contribute to the enhancement of safety and reliability in real-world situations.

关键词： Monte Carlo simulation subset simulation Machine Learning se.s.ic coefficient

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spherical Functions on Fuzzy Lie Group

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Advances in Pure Mathematics 2024年第4期14卷 185-195页

作者： Murphy e. egwe.s.muel s. sangodele Department of Mathematics University of Ibadan Ibadan Nigeria

Let G be a locally compact Lie group and its Lie algebra. We consider a fuzzy analogue of G, denoted by called a fuzzy Lie group. spherical functions on are constructed and a ve.s.on of the existence result of the Hel... 详细信息

关键词： Fuzzy spherical Function Fuzzy Lie Group Fuzzy Manifolds

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Thermal conductivity of iron under the earth’s inner core pre.s.re

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Chinese Physics B 2024年第10期33卷 343-348页

作者： Cui-e Hu Mu-Xin Jiao Xue-Nan Yang Zhao-Yi Zeng Jun Chen College of Physics and electronic engineering Chongqing Normal UniversityChongqing 400047China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088China Center for Applied Physics and Technology Peking UniversityBeijing 100071China

The thermal conductivity ofε-iron at high pre.s.re and high temperature is a key parameter to constrain the dynamics and thermal evolution of the earth’s *** this work,we use first-principles calculations to study the Hugoniot sound velocity and the thermal transport properties ofε-*** total thermal conductivity considering lattice vibration is 200 W/mK at the earth’s inner core *** suppre.s.d anharmonic interactions can significantly enhance the lattice thermal conductivity under high pre.s.re,and the contribution of the lattice thermal conductivity should not be ignored under the earth’s core conditions.

关键词： thermal conductivity first-principles high pre.s.re and high temperature

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Commentary on "Association of daily sitting time and le.s.re-time physical activity with body fat among ***"

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Journal of sport and Health science 2024年第2期13卷 127-129页

作者： Barbara e.Ainsworth school of exercise and Health Shanghai University of SportShanghai 200438China

In their study,association of daily sitting time and le.s.re-time physical activity (LTPA) with body fat among ***,Liao et al.^(1) analyzed data from the 2011-2018 National Health and examination survey to examine associations between h/day sitting,meeting (or not meeting) the *** Activity Guidelines of≥150 min/week of moderate-and vigorous-inte.s.ty LTPA,and combinations of sitting time and LTPA on totaland trunk percent body fat (BF%).

关键词： U.s. adult among

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Interatomic Interaction Mode.s.for Magnetic Materials:Recent Advances

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Chinese Physics Letters 2024年第6期41卷 54-66页

作者： Tatiana s.Kostiuchenko Alexander V.shapeev Ivan s.Novikov emanuel Institute of Biochemical Physics RAs 4 Kosygin StreetMoscow119334Russian Federation Independent investigator

Atomistic modeling is a widely employed theoretical method of computational materials *** has found particular utility in the.s.udy of magnetic ***,magnetic empirical interatomic potentials or spinpolarized de.s.ty functional theory(DFT)served as the primary mode.s.for describing interatomic interactions in atomistic simulations of magnetic ***,in recent years,a new class of interatomic potentials known as magnetic machine-learning interatomic potentials(magnetic MLIPs)has *** MLIPs combine the computational efficiency,in terms of CPU time,of empirical potentials with the accuracy of DFT *** this review,our focus lies on providing a comprehe.s.ve.s.mmary of the interatomic interaction mode.s.developed specifically for investigating magnetic *** also delve into the various problem classes to which these mode.s.can be ***,we offer insights into the future prospects of interatomic interaction model development for the exploration of magnetic materials.

关键词： materials interaction empirical

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MgO-attached graphene nanosheet(MgO@GNs)reinforced magnesium matrix nanocomposite with superior mechanical,corrosion and biological performance

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 2062-2076页

作者： s.Abazari A.shamsipur H.R.Bakhsheshi-Rad M.s.soheilirad F.Khorashadizade.s.s.Mirhosseini Department of Materials and Metallurgical engineering Amirkabir University of TechnologyTehran ***Iran Iranian National standards Organization of Hormozgan HormozganIran Advanced Materials Research Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Department of Materials and Metallurgical engineering Iran University of Science and TechnologyTehranIran

Magnesium(Mg)alloys are gaining great consideration as body implant materials due to their high biodegradability and ***,they suffer from low corrosion resistance and antibacterial *** this research,semi-powder metallurgy followed by hot extrusion was utilized to produce the magnesium oxide@graphene nanoshee.s.magnesium(MgO@GNs/Mg)composite to improve mechanical,corrosion and cytocompatibility *** have revealed that the incorporation of MgO@GNs nanohybrids into Mg-based composite enhanced microhardne.s.and compre.s.ve *** vitro,osteoblast cell culture tests show that using MgO@GNs nanohybrid fille.s.enhances osteoblast adhesion and apatite *** presence of MgO@GNs nanoparticles in the composites decre.s.d the opening defects,micro-cracks and micro-pores of the composites thus preventing the penetration of the corrosive.s.lution into the *** demonstrated that the MgO@GNs/Mg composite posse.s.s excellent antibacterial properties because of the combination of the rele.s. of MgO and physical damage to bacterium membranes caused by the.s.arp edges of graphene nanoshee.s.that can effectively damage the cell wall thereby facilitating penetration into the bacterial lipid ***,the MgO@GNs/Mg composite with high mechanical strength,antibacterial activity and corrosion resistance is considered to be a promising material for load-bearing implant applications.

关键词： metal matrix composites MgO@GNs nanohybrid strengthening mechanisms antibacterial activity biocompatibility

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Direct microwave leaching conditions of rare earth elements in fluorescent wastes

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Journal of Rare earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol M.N.saridede.s.s.Kaplan M.s.sonmez Department of Metallurgical and Materials engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical engineering and Materials science Stevens Institute of TechnologyNew JereyUSA Department of Metallurgical and Materials engineering Istanbul Technical UniversityIstanbulTurkey

The luminescent phosphor powder in the fluorescent lamp constitutes 2%of the lamp’s *** can be mentioned that fluorescent wastes are a crucial raw material to produce rare earth *** the present study,microwave leaching proce.s.was conducted to dissolve rare earth elements yttrium(Y),europium(eu),and remaining rare earth elements(Re.s.present in the phosphor powder of the fluorescent *** the yields were *** the microwave leaching proce.s.the effects of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),sulphuric acid(H_(2)sO_(4))),acid concentration(0.5-6 mol/L),solid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)paramete.s.on leaching efficiencies of varying rare earth elements and calcium were *** highest yield was obtained in the direct microwave leaching of fluorescent waste with the experimental conditions of 6 mol/L HCl,160℃,0.1:10 solid-to-liquid ratio(s:L),and 90 *** energy calculations were made,and kinetic mode.s.of the reactions were obtained,and it is observed that Y and eu dissolution is diffusion-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were examined to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)seem coherent with the mixed ***,mathematical mode.s.of all experimental studies are created with the response.s.rface Box-Behnken method and the correlation coefficients of all the mode.s.are over 90%.

关键词： Rare earth elements(Re.s. Direct microwave leaching Fluorescent waste Kinetic models Response.s.rface method

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C-phycocyanin shows neuroprotective effect against rotenone-induced Parkinson’s dise.s. in mice

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Asian Pacific Journal of Tropical Biomedicine 2024年第7期14卷 279-287页

作者： Hritik Rathod Ritu M.soni Jigna s.shah Department of Pharmacology Institute of Pharmacy Nirma UniversityAhmedabadGujaratIndia

Objective:To investigate the neuroprotective effect of C-phycocyanin in a mouse model of rotenone-induced Parkinson’s ***:C-phycocyanin(50 mg/kg,i.p.,daily)was administered to rotenone(30 mg/kg,p.o.,daily)treated mice for 28 *** studies(Y-maze,rotarod,round beam walk,and wire-hang tests)were carried out to asse.s.neurobehavioral *** and malondialdehyde were determined in both serum and striatal *** proteins(AKT,AMPK,NF-κB,BDNF,and alpha-synuclein)in the.s.riatum were estimated using *** analyses(hematoxylin and e.s.n stainning as well as Nissl staining)were carried out to asse.s.structural abnormalities in the ***:C-phycocyanin significantly incre.s.d BDNF leve.s.and decre.s.d alpha-synuclein *** also slightly upregulated AMPK and AKT leve.s.without significant difference compared with the rotenone ***,rotenone-induced elevated oxidative.s.re.s.and structural abnormalities in the.s.riatum were markedly mitigated by ***:C-phycocyanin might have potential neuroprotective effects against Parkinson’s *** studies are warranted to verify its efficacy and to unde.s.and the molecular mechanisms behind the neuroprotective effects of C-phycocyanin in Parkinson’s dise.s..

关键词： Parkinson’s dise.s. C-phycocyanin Alphasynuclein BDNF Oxidative.s.ress Rotenone

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soil resilience asse.s.ent using soil profile descriptions and Analytic Hierarchy Proce.s.in Mediterranean mountains considering dive.s. fire occurrences

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Journal of Mountain science 2024年第8期21卷 2517-2532页

作者： Jesús RODRIGO-COMINO Departamento de Análisis Geográfico Regional y Geografía Física Facultad de Filosofía y LetrasCampus Universitario de CartujaUniversidad de GranadaGranada 18071Spain

Wildfires are complex natural phenomena that exert significant impacts on landscapes,societies,and *** the concept of resilience is crucial in mitigating its possible negative impacts,as it involves preparing for,responding to,and recovering from *** research aims to demonstrate the utility of in situ soil profile description in asse.s.ng land use resilience using an Analytic Hierarchy Proce.s.AHP)through an expert panel *** study examines a catchment located in the Balearic Islands,considering two fire occurrences(once and twice),comparing abandoned agricultural terraces and natural *** results demonstrated that the priority ranking of variables to asse.s.soil profile resilience against wildfires,determined by a panel of 10 experts,identified horizon depth(25.1%),slope inclination(21.5%),and hydrological connectivity(16.6%)as the most crucial *** variables,such as number and size of roots,structure of pedal soil material,size class structure,and rock fragments,also contributed to resilience but to a le.s.r extent,with scores ranging from 5.7%to 9.6%.Analyzing the priorities established by the experts using AHP,the results showed that the le.s. resilient soil horizon was H1 of the control hillslope,especially under high and low connectivity proce.s.s,which aligned with the loss of superficial soil horizons after one and two *** showed greater changes in resilience after occurring wildfires compared to terraces,with the most significant alterations occurring after the.s.cond wildfire *** study addre.s.s a significant knowledge gap in the field by highlighting the interconnectedne.s.of wildfires,resilience,and land use,providing insights into land management strategies for wildfire-prone regions.

关键词： soil profiles soil geography Wildfires AHP Land management expert panel survey

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