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SARS-CoV-2 variants are associated with.different clinical courses in children with MIS-C

World Journal of pediatrics 2024年第2期20卷 143-152页

作者： Andres F.Moreno Rojas Emelia Bainto helen harvey Adriana h.Tremoulet Jane C.Burns Kirsten B.dummer department of pediatrics Division of Pediatric CardiologyUniversity of California San Diegoand Rady Children’s Hospital3020 Children’s Way MC 5004San DiegoCA 92123USA Kawasaki disease Research Center La JollaCAUSA department of pediatrics Division of Pediatric Critical CareUniversity of California San Diegoand Rady Children’s HospitalSan DiegoCAUSA department of pediatrics University of California San Diegoand Rady Children’s HospitalSan DiegoCAUSA

Background Recent infection with SARS‑CoV-2 in children has been associated with multisystem inflammatory syndrome in children(MIS-C).SARS‑CoV-2 has undergone different *** publications exist about specific variants and their correlation with the severity of *** This was a single-center,retrospective study including all patients admitted with MIS-C at Rady Children’s hospital-San diego between May 2020 and March *** epidemiologic data,including viral genomic information,were obtained from public ***,clinical presentation,laboratory values,and outcomes were obtained from electronic medical *** The analysis included 104 pediatric *** MIS-C waves were *** variants in San diego during the first wave included clades 20A to *** the second wave,there were variants from clades 20A to C,20G,21C(Epsilon),20I(Alpha),and 20J(Gamma).The third wave h.d delta strains(clades 21A,21I,and 21J),and the fourth h.d Omicron variants(clades 21K,21L,and 22C).MIS-C presented with similar symptoms and laboratory findings across all *** patients were admitted to the pediatric intensive care unit(pICU)(74%)and required inotropic support(63%)during the second *** of the patients required mechanical circulatory support,and only two required invasive ventilatory *** was no *** The various strains of SARS-CoV-2 triggered MIS-C with.differing severities,with the second wave having a more severe clinical *** the differences in disease severity across variants were due to changes in the virus or other factors remains unknown.

关键词： Complications COVId-19 MIS-C SARS-CoV-2 variants

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Effect of cerium/lanthanum addition on microstructure and mechanical properties of Al7075 alloy via mechanical alloying and sintering

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Journal of Rare Earths 2016年第4期34卷 420-427页

作者： R.pérez-Bustamante A.Reyna-Cruz d.C.Acosta-pena C.R.Santillán-Rodríguez J.A.Matutes-Aquino F.pérez-Bustamante M.C.Maldonado-Orozco J.Aguilar-Santillán R.Martínez-Sánchez Research Center in Advanced Materials(CIMA V) National Laboratory of NanotechnologyMiguel de Cervantes No.120C.P.31109ChihuahuaChih.Mexico Faculty of Engineering Autonomous University of Chihuahua(UACH)Circuito No.1 Nuevo Campus UniversitarioC.P.31 125ChihuahuaChih.Mexico Faculty of Chemical Sciences Autonomous University of Chihuahua(UACH)Circuito No.1 Nuevo Campus UniversitarioC.P.31125ChihuahuaChih.Mexico Materials&Tools LLC 4118 E Washington CtGilbertAZUSA 85234

The effect of the Al-6Ce-3la（ACL） on the microstructural behavior of the Al7075 was investigated. Materials were synthesized by mechanical alloying with variation in the ACL content and milling time. products were characterized and studied in the as-milled condition and mechanically evaluated after sintering. The synergetic effect of milling time and ACL content in the modified materials led to a reduction in the particle size. Results from electron microscopy showed a homogeneous dispersion of Ce/la phases up to 20 wt.% of ACL content after 10 h of milling. Mechanical evaluation under compressive test showed an improved performance for those alloys reinforced with 0.2 wt.% and 0.5 wt.% of ACL.

关键词： mechanical alloying rare earths aluminum microstructure sintering

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Towards efficient strain engineering of 2d materials:A four-points bending approach for compressive strain

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Nano Research 2024年第6期17卷 5317-5325页

作者： hao Li Félix Carrascoso Ana Borrás Gloria p.Moreno Francisco J.Aparicio Ángel Barranco Andrés Castellanos Gómez Campus de Cantoblanco Instituto de Ciencia de Materiales de MadridC.Sor Juana Inés de la Cruz328049 MadridSpain Nanotechnology on Surfaces and plasma lab Instituto de Ciencia de Materiales de Sevilla(CSIC-Universidad de Sevilla).C/Americo Vespucio 49E-41092 SevilleSpain departamento de Física Aplicada I Escuela Politécnica SuperiorUniversidad de Sevillac/Virgen deÁfrica 7E-41011 SevilleSpain

Strain engineering,as a powerful strategy to tune the optical and electrical properties of two-dimensional(2d)materials by deforming their crystal lattice,has attracted significant interest in recent years.2d materials can sustain ultra-high strains,even up to 10%,due to the lack of dangling bonds on their surface,making them ideal brittle *** remarkable mechanical resilience,together with a strong strain-tunable band structure,endows 2d materials with a broad optical and electrical response upon ***,strain engineering based on 2d materials is restricted by their nanoscale and strain quantification *** this study,we have modified a homebuilt three-points bending apparatus to transform it into a four-points bending apparatus that allows for the application of both compressive and tensile strains on 2d *** approach allows for the efficient and reproducible construction of a strain system and minimizes the buckling effect caused by the van der Waals interaction by adamantane encapsulation *** results demonstrate the feasibility of introducing compressive strain on 2d materials and the potential for tuning their optical and physical properties through this approach.

关键词： uniaxial compressive strain polymer encapsulation differential reflectance spectroscopy exciton tunability

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In Vitro-propagation of Agave tequilana Weber *** in a Temporary Immersion System

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phyton-International Journal of Experimental Botany 2022年第1期91卷 83-96页

作者： Otilio Vázquez-Martínez héctor Gordon Núñez-palenius Eugenio M.pérez-Molphe balch Mauricio Valencia-posadas Luis pérez-Moreno Graciela M.L.Ruiz-Aguilar M.Gómez-Lim división de Ciencias de la Vida Universidad de GuanajuatoIrapuato36500México departamento de Química Centro de Ciencias BásicasUniversidad Autónoma de AguascalientesAguascalientes20131México departamento de Ingeniería Genética CINVESTAV Unidad IrapuatoIrapuato36500México

In Mexico,there is a need to produce large quantities of plantlets for the establishment and replanting of blue(***)agave production *** of these plots are within the origin denomination area(dOT,Spanish acronym)of the distilled product of this plant,known as *** objective of this study was to develop an in vitropropagation protocol for Agave tequilana Weber *** using segmented stems in both:solid and liquid media.A disinfection and in vitro technique were developed to obtain shoots,through plantlets collected in commercial plots,which attained 100%surface-disinfection and budding *** the multiplication stage,the effects of 6-Benzylaminopurine(BA)(0.0,4.4 and 13.2μM)and kinetin(0.0,9.4,18.8 and 37.6μM)were evaluated on lateralshoot production of segmented sagittal *** were cultivated on Murashige&Skoog(MS)medium,with the addition of 3.0%sucrose and 8 g L−1 *** was observed that BA and kinetin increased the number of shoots per explant,obtaining up to 18 and 26,***,it was found that just the sagittal segmentation of explants increased axillary *** the other hand,segmented-stem bases were grown in MS liquid medium with 3.0%sucrose,inside a RITAsystem,programmed by a 5 min immersion step with a frequency of every 4 *** effect of Indole−3-Acetic acid(IAA)(0.57,2.9,5.7μM)was evaluated,while maintaining a concentration of BA(13.2μM).It was observed that the greatest concentration of IAA led to the formation of more than 20 buds per *** results offer a new meth.dology to increase the efficiency of *** Weber ***-in vitro multiplication by sagittal segmentation of stems and the addition of BA and/or IAA.

关键词： plant tissue culture stem-disk culture tequila in vitro culture

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Scavenging and release of REE and hFSE by Na-metasomatism in magmatic-h.drothermal systems

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Fundamental Research 2024年第2期4卷 315-323页

作者： Wu-Bin Yang he-Cai Niu Ning-Bo Li pete hollings Shannon Zurevinski Roger h.Mitchell Key laboratory of Mineralogy and Metallogeny/Guangdong provincial Key laboratory of Mineral physics and Materials Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in deep Earth Science Guangzhou 510640China department of Geology Lakehead UniversityThunder BayON P7B 5E1Canada

Exploitable or potentially exploitable deposits of critical metals,such as rare-earth(REE)and high-field-strength elements(hFSE),are commonly associated with alkaline or peralkaline igneous ***,the origin,transport and concentration of these metals in peralkaline systems remains poorly *** study presents the results of a mineralogical and geochemical investigation of the Na-metasomatism of alkali amphiboles and clinopyroxenes from a barren peralkaline granite pluton in NE China,to assess the remobilization and redistribution of REE and hFSE during magmatic-h.drothermal *** amphiboles and aegirine-augites from the peralkaline granites show evolutionary trends from sodic-calcic to sodic compositions,with increasing REE and hFSE concentrations as a function of increasing Na-index[Na^(#),defined as molar Na/(Na+Ca)ratios].The Na-amphiboles(i.e.,arfvedsonite)and aegirine-augites can be subsequently altered,or breakdown,to form h.drothermal aegirine during late-or post-magmatic *** compositions analyzed by insitu la-ICpMS show that the primary aegirine-augites have high and variable REE(2194-3627 ppm)and hFSE(4194-16,862 ppm)contents,suggesting that these critical metals can be scavenged by alkali amphiboles and *** to the primary aegirine-augites,the presentative early replacement aegirine(Aeg-I,Na^(#)=0.91-0.94)has notably lower REE(1484-1972)and hFSE(4351-5621)*** contrast,the late h.drothermal aegirine(Aeg-II,Na^(#)=0.92-0.96)has significantly lower REE(317-456 ppm)and hFSE(6.44-72.2 ppm)*** that the increasing Na^(#)from aegirine-augites to h.drothermal aegirines likely resulted from Na-metasomatism,a scavenging-release model can explain the remobilization of REE and hFSE in peralkaline granitic *** scavenging and release of REE and hFSE by Na-metasomatism provides key insights into the genesis of globally significant REE and hFSE *** high Na-index of th

关键词： Critical metals Alkali amphiboles Na-metasomatism REE and hFSE Na-index(Na^(#))

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Optimal diet strategy of a large-bodied psittacine: food resource abundance and nutritional content enable facultative dietary specialization by the Military Macaw

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Avian Research 2019年第4期10卷 469-477页

作者： Sylvia Margarita de la parra‑Martinez Luis Guillermo Munoz‑lacy Alejandro Salinas‑Melgoza Katherine Renton departamento de Ciencias Biologicas Centro Universitario de la CostaUniversidad de GuadalajaraAv.Universidad No.203Delegacion IxtapaC.P.48280 Puerto VallartaJaliscoMexico Comision Nacional para el Conocimiento y Uso para la Biodiversidad Liga Periferico‑Insurgentes Sur 4903Delegacion Tlalpan14010 Mexico CityMexico Facultad de Biologia Universidad Michoacana de San Nicolas de HidalgoCiudad UniversitariaMoreliaMichoacanMexico Estacion de Biologia Chamela Instituto de BiologiaUniversidad Nacional Autonoma de MexicoApartado Postal 21San Patricio‑MelaqueJaliscoMexico

Background:dietary specialization should arise when there is a relatively high abundance of a particular resource,where animals may select food items to obtain an optimal diet that maximizes energy ***‑bodied psittacines frequently exhibit a narrow dietary niche with specific habitat use,but few studies have determined whether psittacines select food resources,and how this influences habitat ***:We establish.d fruiting phenology transects to evaluate food resource availability for the large‑bodied Military Macaw(Ara militaris)in semi‑deciduous,deciduous,and pine‑oak forest at two sites along the coast of Jalisco,during the dry season when macaws are *** also determined Military Macaw diet by observations of foraging macaws along transect routes,and conducted bromatological analysis of the nutritional content of the most consumed ***:Military Macaws used six plant species as food items during the dry season,and h.d a narrow dietary niche(Levins’B=0.28),with 56%of foraging macaws consuming the seeds of hura *** food resources were recorded in pine‑oak forest during the dry season,with food resources and foraging by macaws concentrated in tropical deciduous and semi‑deciduous forest,where *** was the most abundant fruiting tree *** considering the proportional availability of food resources,we determined a broad hurlbert dietary niche breadth of h=0.67,indicating that Military Macaws consumed food resources according to their ***,the seeds of *** were an important source of protein,carboh.drates,minerals and moisture,and the hard fruitcasing means that these seeds are exclusively available for ***:By concentrating their diet on the most abundant resources,Military Macaws may increase foraging efficiency in the dry *** high nutrient content also means that concentrating the diet on seeds of *** may be an optimal foraging strategy for Military Macaws

关键词： Ara militaris Bromatological analysis diet composition Food resource selection Fruiting phenology hura polyandra psittacidae Tropical dry forest

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Oxide-supported metal catalysts for anaerobic NAd+regeneration with concurrent h.drogen production

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Chinese Chemical Letters 2024年第2期35卷 263-267页

作者： Jianwei Li Joseph W.h.Burnett Claudia Martinez Macias Russell F.howe Xiaodong Wang Chemical Engineering School of EngineeringLancaster UniversityLancaster LA1 4YWUnited Kingdom Chemistry department University of AberdeenAberdeen AB24 3UEUnited Kingdom

We report SiO_(2)-supported monometallic pt,pd,Au,Ni,Cu and Co catalysts for proton-driven NAd+regeneration,co-producing h_(2).All metals are fully selective to NAd+where the order of turnover frequencies(pt>pd>Cu>Au,Ni and Co)coincides with those otherwise observed in electrochemical h.drogen evolution *** has revealed that NAdh is capable of converting the metal sites into a“cath.de”without an external potential and the NAdh to NAd+reaction involves transferring electron and h.drogen atom ***-deficient ptδ+(on CeO_(2))enhances TOF and the heterogeneous pt/CeO_(2) catalyst is recyclable without losing any activity/selectivity.

关键词： NAd+regeneration heterogeneous catalyst h.drogenase mimic h.drogen binding energy h.drogen production

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Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

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Materials Futures 2024年第1期3卷 165-180页

作者： Jonathan Ruiz Esquius Alec p laGrow haiyan Jin Zhipeng Yu Ana Araujo Rita Marques Adélio Mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre JoséVeigaBraga 4715-330Portugal Carbon Science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain Scientific Imaging Section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan Songshan lake Materials laboratory Dongguan 523808People’s Republic of China laboratory for process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal.

proton exchange membrane(pEM)water electrolysis represents a promising technology for green h.drogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-h.droxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyO_(x)/ATO,20 wt.%(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 M hClO_(4)),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mAµgIr^(−1) and a large turnover frequency of 123 s^(−1) at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec^(−1),better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7µgIr cm^(−2).Importantly,IrNi1O_(x)/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm^(−2) for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir^(3+)/Ir^(4+)species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO_(2) based catalysts for pEM electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

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Exploitation of symmetry in periodic Self-Consistent-Field ab initio calculations: application to large three-dimensional compounds

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Science China Chemistry 2014年第10期57卷 1418-1426页

作者： de la pIERRE Marco ORlaNdO Roberto FERRABONE Matteo ZICOVICh-WILSON Claudio M. dOVESI Roberto dipartimento di Chimica Università di Torino and NIS Nanostructured Interfaces and Surfaces Centre of Excellence Via P. Giuria 7 10125 Torino Italy Nanochemistry Research Institute Department of Chemistry Curtin University GPO Box U1987 Perth WA 6845 Australia Facultad de Ciencias Universidad Autónoma del Estado de Morelos Av. Universidad 1001 Col. Chamilpa 62209 Cuernavaca (Morelos) Mexico

Symmetry can dramatically reduce the computational cost （running time and memory allocation） of Self-Consistent-Field ab initio calculations for crystalline systems. Crucial for running time is use of symmetry in the evaluation of one- and two-electron integrals, diagonalization of the Fock matrix at selected points in reciprocal space, reconstruction of the density matrix. As regards memory allocation, full square matrices （overlap, Fock and density） in the Atomic Orbital （AO） basis are avoided and a direct transformation from the packed AO to the SACO （Symmetry Adapted Crystalline Orbital） basis is per- formed, so that the largest matrix to be handled has the size of the largest sub-block in the latter basis. We here illustrate the effectiveness of this scheme, following recent advancements in the CRYSTAL code, concerning memory allocation and direct basis set transformation. Quantitative examples are given for large unit cell systems, such as zeolites （all-silica faujasite and silicalite MF1） and garnets （pyrope）. It is shown that the full SCF of 3d systems containing up to 576 atoms and 11136 Atomic Orbitals in the cell can be run with a hybrid functional on a single core pC with 500 MB RAM in about 8 h.

关键词： point symmetry Symmetry Adapted Crystalline Orbitals Fock matrix density matrix CpU time memory allocation quantum-mechanical calculations CRYSTAL code

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Genetic variation in the reduction of attractive floral traits of an annual tarweed in response to drought and apical damage

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Journal of plant Ecology 2016年第5期9卷 629-635页

作者： Wilfredo L.Gonzáles Lorena h.Suárez Ernesto Gianoli laboratorio de Ecología Evolutiva LIDFacultad de Ciencias y FilosofíaUniversidad Peruana Cayetano HerediaLimaPerú departamento de Ecología P.Universidad Católica de ChileSantiagoChile departamento de Biología Universidad de La SerenaLa SerenaChile departamento de Botánica Universidad de ConcepciónConcepciónChile

Aims Foliar herbivory and water stress may affect floral traits attractive to *** genotypes may differ in their responses to the interplay between these factors,and evolution of phenotypic plasticity could be expected,particularly in heterogeneous *** aimed at evaluating the effects of simulated herbivory and experimental drought on floral traits attractive to pollinators in genetic families of the annual tarweed Madia sativa,which inhabits heterogeneous environments in terms of water availability,herbivore abundance and pollinator *** In a greenhouse experiment with 15 inbred lines from a *** population located in central Chile(Mediterranean-type climate),we measured the effects of apical bud damage and reduced water availability on:number of ray florets per flower head,length of ray florets,flower head diameter,number of open flower heads per plant,flowering plant height and flowering *** Findings Apical damage and water shortage reduced phenotypic expression of floral traits attractive to pollinators via additive and non-additive *** in low water showed decreased height and h.d fewer and shorter ray florets,and fewer and smaller flower *** plants showed delayed flowering,were less tall,and showed shorter ray florets and smaller flower *** number of ray florets was reduced by damage only in the low water *** height,flowering time and number of flower heads showed among-family *** traits also showed genetic variation for plasticity to water *** floret length,flower head size and time to flowering showed genetic variation for plastic responses to apical *** in flowering time may allow *** to adjust to the increased aridity foreseen for its *** genetic variation for plastic responses was detected,conditions are given for evolutionary responses to selective forces acting on plastic *** suggest that the evolution o

关键词： flower genetic variation herbivory phenotypic plasticity water availability

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