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Adsorption of cobalt by using inorganic components of sediment samples from water bodies

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International Journal of Sediment research 2021年第4期36卷 524-531页

作者： rocío Montes de Oca-Palma marcos solache-ríos Melania Jiménez-reyes José Juan García-Sánchez Perla Tatiana Almazán-Sánchez Instituto Nacional de Investigaciones Nucleares Departamento de Química Tecnológico de Estudios Superiores de Jocotitlán Cátedras CONACyT-Instituto Nacional de Investigaciones Nucleares

The adsorption of cobalt ions was evaluated using sediment samples from water bodies to investigate the adsorption properties of sediment and the behavior of these natural materials in the presence of nuclear and industrial waste. The two sediments(S1 and S2) were treated to eliminate humic and fulvic acids and then they were characterized by several techniques. The minerals found in both the sediments(X-ray diffraction) were quartz and albite; plus, goethite and muscovite in S1, and kaolinite and montmorillonite in S2. Point of zero charge(PZC) of S1 and S2 was 6.00 and 5.22, respectively. The specific area of S1(63.3 m2/g) is higher than S2(1.5 m2/g). Adsorption kinetics data for S1 and S2 were best fitted to the pseudo second-order model. The removal efficiency of S1 for cobalt was 96% with an adsorption capacity(qe) of 0.93 mg/g, and for S2 was 45% with a qeof 0.40 mg/g. The experimental data of the adsorption isotherms were adjusted to Langmuir and Freundlich models for S1 and S2, respectively. The thermodynamic parameters(enthalpy, entropy, and Gibb’s free energy) indicated that the adsorption processes were endothermic, spontaneous, and chemisorption mechanism. The results show that the adsorption capacities of the sediments depend on their composition. These water sediments have important adsorption properties for cobalt, and they can be used in the treatment of nuclear and industrial aqueous wastes.

关键词： Water-body sediment Cobalt ions Adsorption

Small extrachromosomal circular DNA in amyotrophic lateral sclerosis matter

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Neural regeneration research 2025年第5期20卷 1411-1413页

作者： marcos J.Arauzo-Bravo Daniela Gerovska Matthias Schwab Alexandra Kretz Computational Biology and Systems Biomedicine Biodonostia Health Research InstituteSan SebastianSpain Basque Foundation for Science IKERBASQUEBilbaoSpainMax Planck Institute for Molecular BiomedicineComputational Biology and Bioinformatics GroupMünsterNorth Rhine-WestphaliaGermany Department of Cell Biology and Histology Faculty of Medicine and NursingUniversity of Basque Country(UPV/EHU)LeioaSpain Department of Neurology Jena University HospitalJenaThuringiaGermany

Comprehensive studies identify motor neuron spectrum disorders including amyotrophic lateral sclerosis(ALS)as globally rising fatal disorders with the highest prevalence in aging populations,influenced by ethnicity and ancestry(GBD 2016 Motor Neuron Disease Colla borators,2018).While~10% of diagnoses involve a family history(fALS),most cases are considered sporadic(sALS).However,population-based studies suggest that even cases without a common index mutation impart heritability(ryan et al.,2019),indicating a crucial role of rare and as yet unknown genetic denominators.

关键词： amyotrophic sclerosis

Metal and organo-catalysed asymmetric hydroaminomethylation of styrenes

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催化学报 2015年第1期36卷 106-112页

作者： Barbara Villa-marcos Jianliang Xiao Department of Chemistry University of Liverpool

A new protocol that enables asymmetric hydroaminomethylation of styrenes to afford chiral amines has been developed. Catalysed by an rh-phosphine species and a chiral phosphoric acid, styrenes are converted into β-chiral amines with good enantioselectivities under syngas in the presence of an amine and Hantzsch ester. The reaction involves two key steps, hydroformylation and reductive amination, with the former catalysed by the rh species whilst the latter by the phosphoric acid.

关键词：苯乙烯不对称有机催化金属对映选择性加氢甲酰化手性胺酸催化

Plant-available water capacity of soils at a regional scale:Analysis of fixed and dynamic field capacities

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Pedosphere 2024年第3期34卷 590-605页

作者： Vinod PHOGAT Paul rPETrIE Casandra COLLINS marcos BONADA South Australian research and Development Institute GPO Box 397Adelaide SA 5001(Australia) School of Agriculture Food and WineWaite Research InstituteUniversity of AdelaideWaite CampusPMB1Glen Osmond SA 5064(Australia) College of Science and Engineering Flinders UniversityBedford Park SA 5042(Australia) The University of New South Wales Sydney NSW 2052(Australia) ArC Training Centre for Innovative Wine Production University of AdelaidePMB1Glen Osmond SA 5064(Australia)

Estimation of the plant-available water capacity(PAWC)of soils at a regional scale helps in adopting better land use planning,developing suitable irrigation schedules for crops,and optimizing the use of scarce water *** the current study,72 soil profiles were sampled from the Barossa region of South Australia to estimate pedo-transfer functions deduced from easily estimated soil *** functions were then used to estimate the fixed(10 and 33 kPa)and dynamic pressure head(h_(fc))water contents at field capacity(FC)for minimum drainage flux(0.01 and 0.001 cm d^(-1)),which serves as the upper boundary for plant-available water in *** estimated residual water content was corrected for subsoil constraints,especially the exchangeable sodium percentage(ESP).The results showed that the mean values of h_(fc)in sand-dominated light and medium textured soils(i.e.,sand,loamy sand,sandy loam,and loam)varied in a narrow range(15.8-18.2 kPa),whereas those in the clay-dominated heavy textured soils(i.e.,clay loam)showed a wide range(11.3-49.3 kPa).There were large differences in PAWC for dynamic FC(PAWC_(fc))and fixed FC at 10 kPa(PAWC10),33 kPa(PAWC33),and a mix of 10and 33 kPa(PAWC_(10,33))pressure heads depending on soil ***,the difference between PAWC at 10 kPa and h_(fc)(ΔPAWC_(10))was positive,whereas that between 33 kPa and h_(fc)(ΔPAWC_(33))was negative across all ***,the estimation of PAWC assuming a fixed FC at 10 and 33 kPa pressures(i.e.,PAWC_(10,33))for sandy,clay,and silty soils reduced the difference between fixed and dynamic pressure PAWCs toross the *** estimation of PAWC was improved by incorporating the impact of subsoil constraints,such as high ESP,which was more pronounced for clay and silty *** findings demonstrate the inherent inconsistencies between static pressure and flux-based dynamic FC estimations in *** heterogeneity,intra-texture variability,subsoil constraints,and swell

关键词： crop lower limit drained upper limit pedo-transfer function soil hydraulic parameter soil texture

Cataracting-centrifuging transition investigation using nonspherical and spherical particles in a rotary drum through CFD simulations

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Particuology 2022年第1期20卷 48-60页

作者： Wanessa M.Benedito Claudio r.Duarte marcos A.S.Barrozo Dyrney A.Santos Institute of Chemistry Federal University of Goias-UFGCampus SamambaiaGoianiaGO74690-900Brazil School of Chemical Engineering Federal University of Uberlandia-UFUCampus Santa MonicaUberlandiaMG38408-144Brazil

This paper aims to systematically investigate the cataracting-centrifuging transition in a rotary drum involving spherical and nonspherical particles by using the Multiphase Granular Eulerian Model(MGEM).The effects of drum length and particle shape on the cataracting-centrifuging transition behavior were *** results showed that drum length plays an important role in the cataracting-centrifuging transition,although most related works in the literature do not consider *** particle shape also significantly affects the cataracting-centrifuging transition *** particles required lower rotation speeds than spherical particles to reach the centrifuging *** particle shape was shown to be related to the critical solid fraction(asc)from Schaeffer’s model,although further investigations are required to completely correlate particle spherecity with critical solid volume fractions.

关键词： Frictional viscosity MGEM model Particle shape Drum length Drum flow regimes

Pathogenesis and clinical management of arboviral diseases

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World Journal of Virology 2025年第1期14卷 9-50页

作者： Victoria Cenci Dietrich Juan marcos Caram Costa Marina Maria Gomes Leite Oliveira Carlos Eduardo Oliveira Aguiar Luis Guilherme de Oliveira Silva Marcel Silva Luz Fabian Fellipe Bueno Lemos Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Arboviral diseases are viral infections transmitted to humans through the bites of arthropods,such as mosquitoes,often causing a variety of pathologies associated with high levels of morbidity and *** the past decades,these infections have proven to be a significant challenge to health systems worldwide,particularly following the considerable geographic expansion of the dengue virus(DENV)and its most recent outbreak in Latin America as well as the difficult-tocontrol outbreaks of yellow fever virus(YFV),chikungunya virus(CHIKV),and Zika virus(ZIKV),leaving behind a substantial portion of the population with complications related to these ***,the world is experiencing a period of intense globalization,which,combined with global warming,directly contributes to wider dissemination of arbovirus vectors across the ***,all continents remain on high alert for potential new ***,this review aims to provide a comprehensive understanding of the pathogenesis of the four main arboviruses today(DENV,ZIKV,YFV,and CHIKV)discussing their viral characteristics,immune responses,and mechanisms of viral evasion,as well as important clinical aspects for patient *** includes associated symptoms,laboratory tests,treatments,existing or developing vaccines and the main associated complications,thus integrating a broad historical,scientific and clinical approach.

关键词： Arboviruses Arbovirus infections Dengue Zika virus Yellow fever Chikungunya virus Clinical diagnosis Pathogenesis Flavivirus Togaviridae infections

Filtering cylindrical–conical hydrocyclone

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Particuology 2019年第6期17卷 54-62页

作者： Fernanda FSalvador marcos ASBarrozo Luiz GMVieira Federal University of Espírito Santo Center of Agricultural Sciences and EngineeringDepartment of Rural EngineeringZIP Code:29500-000AlegreESBrazil Federal University of Uberlândia Chemical Engineering SchoolBlock 1 KCampus Santa MônicaZIP Code:38400-902UberlândiaMGBrazil

Hydrocyclones have versatile applications in various industrial *** functionn on the principle of centrifugal separation to remove a dispersed phase(particles or drops)from a continuous phase(fluid).In unconventional filtering hydrocyclones,the separation efficiency and energy costs have been improved by combining filtration with centrifugal *** work investigated experimentally the effect of incorporating a cylinder and a porous cone in a conventional *** also evaluated the effects of the main geometric dimensions of the separator on the hydrocyclone performance.A differential-evolution algorithm was applied to optimize the hydrocyclone performance,which was represented as the maximum total efficiency and minimum Euler *** experimental results validated the optimization results and showed that hydrocyclones with optimized geometries exhibited higher total efficiencies(89.59%)and lower Euler numbers(582)than hydrocyclones with other experimental configurations.

关键词： Solid–liquid separation Hydrocyclone Filtration Differential evolution

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Imprinting in plants

Chinese Science Bulletin 2009年第14期54卷 2383-2389页

作者： GUTIErrEZ-marcos Jose Warwick HrI University of WarwickWellesbourneCV35 9EF UK

Genomic imprinting leads to the differential expression of parental alleles after fertilization. Imprinting appears to have evolved independently in mammals and flowering plants to regulate the development of nutrient-transfer placental tissues. In addition, the regulation of imprinting in both mammals and flowering plants involves changes in DNA methylation and histone methylation, thus suggesting that the epigenetic signals that regulate imprinting have been co-opted in these distantly related species.

关键词：开花植物 DNA甲基化基因组印记哺乳类动物差异表达基因胎盘组织养分转移信号调节

Isolation and characterization of nine microsatellite loci from Aphelinus mali （Hymenoptera： Aphelinidae）, a parasitoid of Eriosoma lanigerum （Hemiptera： Aphididae）

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Insect Science 2010年第6期17卷 549-552页

作者： Bias Lavandero marcos Dominguez Instituto de Biologia Vegetal y Biotecnologia Universidad de Talca Casilla 747 Talca Chile

Nine novel microsatellite markers are presented for Aphelinus mali, a parasitoid of the woolly apple aphid Eriosoma lanigerum. Loci were characterized for 28 individuals from a single orchard in central Chile. Seven loci were polymorphic within A. mali （3-6 alleles per locus; observed heterozygosity ranging from 0.04 to 0.57） and are therefore useful for population genetic studies within this species.

关键词： Aphelinus mali Chalcidoidea Chile microsatellite population genetics