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Highly electroactive N–Fe hydrothermal carbons and carbon nanotubes for the oxygen reduction reaction

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Journal of Energy chemistry 2020年第11期29卷 260-270页

作者： R.G.morais N.Rey-Raap J.l.Figueiredo M.F.R.Pereira Associate laboratory lSRE-lcM Departamento de Engenharia QuimicaFaculdade de EngenhariaUniversidade do PortoR.Dr.Roberto Frias s/n4200-465PortoPortugal

Glucose-derived carbons were prepared by hydrothermal carbonization of glucose followed by carbonization or activation to obtain carbon materials with different microporosities. These microporous carbons and carbon nanotubes(cNTs) were functionalized with melamine and/or iron(Ⅱ) phthalocyanine(FePc)following three different methodologies:(i) Functionalization with melamine via thermal treatment,(ii)incorporation of the lowest amount of FePc reported in the literature via incipient wetness impregnation followed by thermal treatment and(iii) functionalization with melamine followed by Fe Pc incorporation.The chemical and textural characterization of the prepared materials and their electrochemical assessment allowed to understand the role of microporosity in the incorporation of FePc and its effect on the oxygen reduction reaction(ORR). It was observed that FePc was preferentially incorporated inside the porous structure, especially in samples with more developed microporosity. However, functionalization with melamine modified the textural properties and the surface chemistry, favoring the incorporation of FePc on the surface. Regarding the electrochemical performance, the presence of FePc greatly enhanced the electroactivity of the microporous catalysts. An onset potential of 0.88 V and a four-electron pathway were obtained for glucose-derived carbons, whereas the limiting current densities and kinetic current densities rose by 126% and 222%, respectively, in comparison to the base sample. Notwithstanding, the highest electrochemical activity was observed for the sample prepared with cNTs, due to the synergy between the active metal centers and their highly graphitic carbon structure. The electrochemical parameters of cNTFeP csurpass the commercial Pt/c. The half-wave potential is 40 mV higher, the limiting current density increases by 17%, and a negligible production of by-products(< 1%) was observed.

关键词： Iron(Ⅱ)phthalocyanine Hydrothermal carbons carbon nanotubes Oxygen reduction reaction Electrocatalysis

What can a heavy U(1)B-l Z'boson do to the muon(g-2)u anomaly and to a new Higgs boson mass?

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chinese Physics c 2021年第1期45卷 32-46页

作者： Antonio P.morais Roman Pasechnik J.Pedro Rodrigues Departamenlo de Fisica da Universidade de Aveiro and cIDMA campus de Santiago 3810-183 AveiroPortugal Department of Astronomy and Theoretical Physics Lund UniversitySE 223-62 LundSweden Nuclear Physics Institute AScR 25068 RezCzech Republic Departamento de Fisica CFMUniversidade Federal de Santa CatarinaC.P.476CEP 88.040-900FlorianopolisSCBrazil

The minimal U(1)B_l extension of the Standard Model(B-l-SM)offers an explanation for neutrino mass generatio n via a seesaw mechanism;it also offers two new physics states,namely an extra Higgs bos on and a new Z'gauge boson.The emerge nee of a second Higgs particle as well as a new Z'gauge boson,both lin ked to the breaking of a local U(1)B_l symmetry,makes the B-l-SM rather constrained by direct searches in large Hadron collider(lHc)experiments.We investigate the phenomenological status of the B-l-SM by confr on ting the new physics predictions with the lHc and electroweak precision data.Taking into account the current bounds from direct lHc searches,we demonstrate that the prediction for the muon(g-2)u anomaly in the B-l-SM yields at most a contribution of approximately 8.9×10^-12,which represents a tension of 3.28 standard deviations,with the current 1σuncertainty,by means of a Z'boson if its mass is in the range of 6.3 to 6.5 TeV,within the reach of future lHc runs.This means that the B-l-SM,with heavy yet allowed Z‘bos on mass range,in practice,does not resolve the tension between the observed anomaly in the muon(g-2)u and the theoretical prediction in the Standard Model.Such a heavy Z'boson also implies that the minimal value for the new Higgs mass is of the order of 400 GeV.

关键词： beyond Standard Model Higgs physics gauge extensions of the Standard Model Z'boson

感染松萎蔫病的葡萄牙海岸松中内生细菌的分离

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南京林业大学学报（自然科学版） 2011年第3期35卷 149-150页

作者： Vieira dos Santos M c Proenca D A N Fonseca l Abrantes I M de O morais P V IMAR-cMA Departamento de ZoologiaFaculdade de Ci ncias e Tecnologia Universidade de Coimbra (FCTUC) 3004-517 Coimbra Portugal Departamento de Zoologia FCTUC 3004-517 Coimbra Portugal Departamento de Bioqu mica FCTUC 3001-401 Coimbra Portugal

葡萄牙海岸松被松材线虫感染后的迅速死亡表明有其他生物的介入。内生细菌是一类普遍存在的生物,它在大部分植物中能形成种群。松材线虫携带的细菌也有可能导致海岸松的迅速死亡。笔者通过培养分离得到的细菌分离物,利用扩增性核糖体DN... 详细信息

葡萄牙海岸松被松材线虫感染后的迅速死亡表明有其他生物的介入。内生细菌是一类普遍存在的生物,它在大部分植物中能形成种群。松材线虫携带的细菌也有可能导致海岸松的迅速死亡。笔者通过培养分离得到的细菌分离物,利用扩增性核糖体DNA限制性酶切片段分析(ARDRA)和变性梯度凝胶电泳分析(DGGE),了解被感染的和未被感染的海岸松内生细菌的种群结构,以分析鉴定与松材线虫相关的细菌。从样树和松材线虫中分离的细菌Alphaproteobacteria、Bacteroidetes属仅存在于内生菌中,而Actinobacteria、Firmicutes被发现仅与松材线虫相关。ARDRA和DGGE分析证明内生菌种群结构多样性的差异可能与松材线虫的入侵有关。这种细菌种群的多样性差异似乎与Burkholderia、Pseudomonas和luteibacter属中的某些菌株有关。而从树中分离出来的Janthinobacterium agaricidamnosum、P.lutea和Dyella yeojuensis与松材线虫相关。

关键词：松材线虫松萎蔫病海岸松种群结构

Exploring the potential for an evolutionarily conserved role of the taste 1 receptor gene family in gut sensing mechanisms of fish

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Animal Nutrition 2022年第4期11卷 293-308页

作者： Anna Rita Angotzi Esther leal Sara Puchol José M. cerdá-Reverter Sofia morais Department of Fish Physiology and Biotechnology Instituto de Acuicultura de Torre de la SalIATS-CSICTorre la Sal s/nRibera de Cabanes12595 CastellonSpain lucta S.A. Innovation DivisionAnimal Science UnitUAB Research Park08193 BellaterraSpain

In this study,we investigated the transcriptional spatio-temporal dynamics of the taste 1 receptor(T1R)gene family repertoire in seabream(Sparus aurata[sa]),during larval ontogeny and in adult tissues.In early larval development,sa T1R expression arises heterochronously,i.***.the extraoral taste-related perception in the gastrointestinal tract(GIT)anticipates first exogenous feeding(at 9 days post hatching[dph]),followed by the buccal/intraoral perception from 14 dph onwards,supporting the hypothesis that the early onset of the molecular machinery underlying sa T1R expression in the GIT is not induced by food but rather genetically hardwired.During adulthood,we characterized the expression patterns of sa T1R within specific tissues(n=4)distributed in oropharingeal,GIT and brain regions substantiating their functional versatility as chemosensory signaling players to a variety of biological functions beyond oral taste sensation.Further,we provided for the first time direct evidences in fish for m RNA coexpression of a subset of sa T1R genes(mostly sa T1R3,i.***.the common subunit of the heterodimeric T1R complexes for the detection of“sweet”and“umami”substances),with the selected gut peptides ghrelin(ghr),cholecystokinin(cck),hormone peptide yy(pyy)and proglucagon(pg).Each peptide defines the enteroendocrine cells(Eccs)identity,and establishes on morphological basis,a direct link for T1R chemosensing in the regulation of fish digestive processes.Finally,we analyzed the spatial gene expression patterns of 2 taste signaling components functionally homologous to the mammalian G(i)a subunit gustducin,namely sa G(i)a1 and sa G(i)a2,and demonstrated their co-localization with the sa T1R3in EEcs,thus validating their direct involvement in taste-like transduction mechanisms of the fish GIT.In conclusion,data provide new insights in the evolutionary conservation of gut sensing in fish suggesting a conserved role for nutrient sensors modulating entero-endocrine secretion.

关键词： Taste 1 receptor Fish larvae Gut nutrient sensing Gut peptides G(i)alpha protein subunits 1 and 2

Species of lasiodiplodia associated with mango in Brazil

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Fungal Diversity 2013年第4期61卷 181-193页

作者： Marília W.Marques Nelson B.lima Marcos Antônio de morais Jr Maria Angélica G.Barbosa Breno O.Souza Sami J.Michereff Alan J.l.Phillips Marcos P.S.câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil Embrapa Semi-Árido 56302-970 PetrolinaBrazil centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Mango(Mangifera indica)is a major tropical fruit species cultivated in Brazil.The objective of this study was to identify species of lasiodiplodia associated with dieback and stem-end rot of mango in the semi-arid region of Northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 120 isolates of lasiodiplodia were used and identifications were made using a combination of morphology and phylogenetic analysis based on partial translation elongation factor 1-αsequence(EF1-α)and internal transcribed spacers(ITS).The following species were identified:lasiodiplodia crassispora,l.egyptiacae,l.hormozganensis,l.iraniensis,l.pseudotheobromae,l.theobromae and lasiodiplodia sp..lasiodiplodia theobromae was the most frequently isolated species,which represented 41%of all the isolates.Only this species had been previously reported on mango in Brazil,while the other species represent the first report associated with mango tree diseases in this country.lasiodiplodia crassispora is reported for the first time associated with mango diseases worldwide.There were significant differences in mycelial growth rates among the lasiodiplodia species and also in the optimum temperature for growth.All species of lasiodiplodia were pathogenic on mango fruit.There were significant differences in virulence among the species,wherein l.hormozganensis and lasiodiplodia sp.were the most virulent,while the least virulent were l.iraniensis,l.pseudotheobromae,l.crassispora and l.egyptiacae.

关键词： Botryosphaeriaceae Mangifera indica ITS EF1-α Phylogeny Virulence

Bromatological characteristics of sugarcane silages inoculated with lactobacillus buchneri

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Bromatological characteristics of sugarcane silages inoculat...

Botryosphaeria, Neofusicoccum, Neoscytalidium and Pseudofusicoccum species associated with mango in Brazil

ⅩⅪ International Grassland congress and the Ⅷ International Rangeland congress

作者： J.c.Pinto c.l.S.Avila H.c.P.Figueiredo A.R.morais O.G.Pereira R.F.Schwan Universidade Federal de lavras Minus Gerais Brazil Universidade Federal de Vicosa Minas GeraisBrazil

＜正＞Introduction The intense alcoholic fermentation by yeasts during sugarcane ensiling results into high rates of DM losses. Inoculants containing the species l.buchneri have proved effective in inhibiting the growth of yeasts（Pedroso et al.,2005）. The objective of this work was to evaluate the effect of the addition of two strains of l.buchneri,one from a commercial inoculant and the other isolated from sugarcane silage,upon the fermentation profile of this forage plant.

关键词： crude protein dry matter fermentation profile fiber inoculants Saccharumspp

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Fungal Diversity 2013年第4期61卷 195-208页

作者： Marília W.Marques Nelson B.lima Marcos A.de morais Jr Sami J.Michereff Alan J.l.Phillips Marcos P.S.câmara Departamento de Agronomia Universidade Federal Rural de Pernambuco52171-900 RecifeBrazil Departamento de Genética Universidade Federal de Pernambuco50732-970 RecifeBrazil centro de Recursos Microbiológicos Departamento de Ciências da VidaFaculdade de Ciências e TecnologiaUniversidade Nova de Lisboa2829-516 CaparicaPortugal

Members of the Botryosphaeriaceae are well known fungi associated with dieback,canker and fruit rot on various hosts worldwide,including mango.The aim of this study was identify a large collection of Botryosphaeriaceae species associated with dieback and stem-end rot of mango in the semi-arid region of Northeastern Brazil,and compare the species in relation to mycelial growth,pathogenicity and virulence.A total of 115 isolates were sampled and based on morphology and DNA sequence data(ITS and EF1-α)seven taxa were identified,namely,Botryosphaeria dothidea,B.mamane,Fusicoccum fabicercianum,Neofusicoccum parvum,N.brasiliense sp.nov,Neoscytalidium dimidiatum and Pseudofusicoccum stromaticum.B.dothidea and P.stromaticum were the most commonly isolated species,which represented 37%and 33%of all isolates respectively.B.mamane is reported for the first time in association with mango diseases worldwide.There were significant differences among the species obtained in this study in relation to optimum temperature for mycelial growth and mycelial growth rates.All species were pathogenic on mango fruit.There were significant differences in virulence among the species,with Ne.dimidiatum and N.parvum being the most virulent species,while P.stromaticum was the least virulent.

关键词： Botryosphaeriaceae Dieback Stem-end rot Mangifera indica Pathogenicity Virulence Phylogeny

日粮中添加蜂胶及莫能菌素对育肥羔羊行为与生产性能的影响

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饲料博览 2011年第10期21卷 42-42页

作者： Itavo c c B F morais M G costa c Itavo l c V Franco G l Da Silva J A Reis F A 不详

试验在育肥羔羊日粮中添加绿色蜂胶、棕色蜂胶以及莫能菌素钠,研究其对羔羊的行为和生产性能的影响。试验采用随机区组设计,选取4月龄公羔羊32只,随机分为4个处理组。各处理组的试验日粮设计为:对照组为基础日粮、基础日粮中添加绿色蜂... 详细信息

试验在育肥羔羊日粮中添加绿色蜂胶、棕色蜂胶以及莫能菌素钠,研究其对羔羊的行为和生产性能的影响。试验采用随机区组设计,选取4月龄公羔羊32只,随机分为4个处理组。各处理组的试验日粮设计为:对照组为基础日粮、基础日粮中添加绿色蜂胶、基础日粮中添加棕色蜂胶、基础日粮中添加莫能菌素钠。各处理组中基础日粮为全混合日粮(TMR)精粗比为50:50,粗饲料以苏丹草85(狗牙根属)为主要成分,浓缩料以豆粕、玉米粉和矿物质为主要成分。试验研究表明,日粮中添加绿色蜂胶可以减少反刍并增加休息时间,与对照组相比能提供相同的采食率(g·min-1),DM和Andf摄入量均高于对照组。对照组的体增重最高,但饲养过程中发现棕色蜂胶和莫能菌素钠处理组的饲料转化率和饲料利用效率最高。试验证明,棕色蜂胶可以替代莫能菌素钠作为育肥羔羊日粮添加剂。然而,为达到增加采食量的目的,确定棕色蜂胶最佳添加水平需要进一步研究。

关键词：饲养场饲料转化率饲料效率动物行为羊反刍

Extracellular vesicles as a potential therapeutic for age-related macular degeneration

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Neural Regeneration Research 2023年第9期18卷 1876-1880页

作者： lorraine l.c.chow Ben Mead School of Optometry and Vision Sciences Cardiff UniversityCardiffUK

Age-related macular degeneration is a major global cause of central visual impairment and seve re vision loss.With an aging population,the already immense economic burden of costly anti-vascular endothelial growth fa ctor treatment is likely to increase.In addition,current conventional treatment is only available for the late neovascular stage of age-related macular degeneration,and injections can come with potentially devastating complications,introducing the need for more economical and ris kfree treatment.In recent years,exosomes,which are nano-sized extracellular vesicles of an endocytic origin,have shown immense potential as diagnostic biomarkers and in the therapeutic application,as they are bestowed with characte ristics including an expansive cargo that closely resembles their parent cell and exceptional ability of intercellular communication and targeting neighboring cells.Exosomes are currently undergoing clinical trials for various conditions such as type 1 diabetes and autoimmune diseases;however,exosomes as a potential therapy for seve ral retinal diseases have just begun to undergo scrutinizing investigation with little literature on age-related macular degeneration specifically.This article will focus on the limited literature availa ble on exosome transplantation treatment in age-related macular degeneration animal models and in vitro cell cultures,as well as briefly identify future research directions.current literature on exosome therapy using agerelated macular degeneration rodent models includes laser retinal injury,N-methyl-N-nitrosourea,and royal college of surgeon models,which mimic inflammatory and degenerative aspects of agerelated macular degeneration.These have shown promising results in preserving retinal function and morphology,as well as protecting photoreceptors from apoptosis.Exosomes from their respective cellular origins may also act by regulating the expression of various inflammatory cyto kines,mRNAs,and proteins involved in photo receptor degeneration pathways to exert a thera

关键词： age-related macular degeneration exosomes extracellular vesicles miRNA neuroprotection photoreceptors retina retinal pigment epithelium