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Journal of Advanced Ceramics 2020年第3期9卷 329-338页

作者： C.MONTERO-TAVERA M.d.dURRUTHY-ROdRiGUEZ f.d.cortes-vega J.M.YANEZ-LIMON Center for Research and Advanced Studies of IPN Campus QueretaroMexico National Evangelical University Paseo de los Periodistas#54Ensanche MirafloresSanto DomingoDistrito NacionalRepiblica Dominicana

Pure *** sNbO3(KNN)and KNN doped with Lit(6%mole),Lat(1.66%,5%,6%mole),and Ti+t(10%mole)were prepared by mixture of oxides using high-energy milling and conventional solid-state *** effects of the dopant on the physical properties of pure KNN have been evaluated based on the structural,ferroelectric,pyroelectric,and dielectric *** XRd measurements show that KNN pure sample contains a mixture of monoclinic and orthorhombic crystalline phases,with a slightly higher concentration of monoclinic *** contrast,all doped samples show a higher concentration of the orthorhombic phase,as well as the presence of a secondary phase(K6Nb10.8O3o),also detected by Raman *** samples with a higher concentration of this secondary phase,also present greater dielectric losses and lower values of remnant *** dielectric measurements allowed us to detect temperatures of structural transitions(orthorhombic-tetragonal,O-T)previous to the ferroelectric paraelectric transition(tetragonal-cubic,T-C),and also in this set of samples,a direct correlation was found between the values of remnant polarization and the corresponding pyroelectric signal response.

关键词： K0.5Na0.5NbO3(KNN) lead-free solid-state reaction structural properties pyroelectric properties dielectric properties Li,La,Ti doping elements

Computational screening of transition metal-doped CdS for photocatalytic hydrogen production

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npj Computational Materials 2022年第1期8卷 2190-2198页

作者： Yuting Li daniel Bahamon Mutasem Sinnokrot Lourdes f.vega Research and Innovation Center on CO_(2) and Hydrogen(RICH) Khalifa UniversityPO Box 127788Abu DhabiUAE Chemical Engineering department.Khalifa University PO Box 127788Abu DhabiUAE Chemistry department Khalifa UniversityPO Box 127788Abu DhabiUAE

A novel computational screening study of single transition metal(TM),TM-doped,and dual TMs-doped on CdS(110)surfaces via dfT calculations is presented,focusing on their stability and catalytic activity,searching for efficient photocatalysts for hydrogen *** based on key performance descriptors allowed to fine-tune the *** indicate that TM dopants can reduce the energy band gap and enhance impurity ***,Rh,and Pd were found to be the best dopants in TM-doped CdS,since their|ΔG_(H)|is 80%smaller compared to the pristine CdS ***,TM1-TM2-co-doped CdS catalysts show better performance for the hydrogen evolution reaction(HER)due to synergistic effects of the two TMs,where Co-Pt,Pd-Pt and Co-Rh co-doping CdS significantly reduced|ΔGH|to less than 0.1 *** point out four promising novel co-catalysts(i.e.,Co,Co-Pt,Co-Rh,Rh-Ag)with very good performance in HER,to be further explored in experimental studies.

关键词： surface transition allowed

Optimal microgrid planning for enhancing ancillary service provision

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 862-875页

作者： Sergio f.CONTRERAS Camilo A.cortes Johanna M.A.MYRZIK Institute of Automation Technology University of BremenOtto-Hahn-Allee 1 NW1/M1050(70)28359 BremenGermany department of Electrical and Electronics Engineering Universidad Nacional de ColombiaCarrera 30 Calle 45.Ciudad Universitaria Edificio 453Bogota′Colombia

Microgrids have presented themselves as an effective concept to guarantee a reliable,efficient and sustainable electricity delivery during the current transition era from passive to active distribution ***,microgrids could offer effective ancillary services(AS)to the power utility,although this will not be possible before the traditional planning and operation methodologies are ***,a probabilistic multi-objective microgrid planning(POMMP)methodology is proposed in this paper to contemplate the large number of variables,multiple objectives,and different constraints and uncertainties involved in the microgrid *** planning methodology is based on the optimal size and location of energy distributed resources with the goal of minimizing the mismatch power in islanded mode,while the residual power for AS provision and the investment and operation costs of the microgrid in grid-connected mode are maximized and minimized,*** that purpose,probabilistic models and a true multi-objective optimization problem are implemented in the *** methodology is tested in an adapted PG&E 69-bus distribution system and the non-dominated sorting genetic algorithmⅡ(NSGA-Ⅱ)optimization method and an analytic hierarchy process for decision-making are used to solve the optimization problem.

关键词： Microgrid Ancillary services(AS) Planning Multi-objective optimization decision-making

Biochemical dissection of STAT3 signaling in amyotrophic lateral sclerosis

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Neural Regeneration Research 2025年第11期20卷 3229-3230页

作者： Savina Apolloni Nadia d’Ambrosi department of Biology University of Rome Tor VergataRomeItaly

Amyotrophic lateral sclerosis(ALS)is a progressive neurodegenerative disease characterized by the loss of upper and lower motor neurons,clinically marked by muscle atrophy and *** the clinical course is highly variable,the average time from the onset of symptoms to the need for respiratory support or death is 3-5 *** is the most prevalent motor neuron disease in adults,occurring at a rate of 2 per 100,000 individuals and affecting 5.4 per 100,000 individuals overall.

关键词： STAT3 dissection sclerosis

Verdier quotients of homotopy categories of rings and Gorenstein-projective precovers

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Science China Mathematics 2024年第12期67卷 2701-2712页

作者： Manuel cortes-Izurdiaga departamento de Matematica Aplicada Universidad de MalagaMalaga 29071Spain

Let R be a ring, Proj be the class of all the projective right R-modules, K be the full subcategory of the homotopy category K(Proj) whose class of objects consists of all the totally acyclic complexes, and MorK be the class of all the morphisms in K(Proj) whose cones belong to K. We prove that if K(Proj) has enough MorK-injective objects, then the Verdier quotient K(Proj)/K has small Hom-sets, and this last condition implies the existence of Gorenstein-projective precovers in Mod-R and of totally acyclic precovers in C(Mod-R).

关键词： homotopy category Gorenstein-projective precover Verdier quotient small Hom-sets totally acyclic complex

Technosols Made of Wastes to Improve Physico-Chemical Characteristics of a Copper Mine Soil

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Pedosphere 2013年第1期23卷 1-9页

作者： V.ASENSIO f.A.vega M.L.ANdRAdE E.f.COVELO department de Bioloxía Vexetal e Ciencia do Solo Facultade de Bioloxia Universidade de VigoLagoas Marcosende 36310 Vigo Pontevedra (Spain)

Mine tailing soils created from the copper extraction in Touro Mine （Northwest Spain） are very degraded both physically and chemically. Three plots in this mine tailing were amended with Technosols in different proportions in each one to know if this mixture improved the physico-chemical characteristics of the mine soil and contaminated it with heavy metals. The Technosols were made of organic wastes, including mussel residues, wood fragments, sewage sludges and paper mill ashes. An unamended area was used as a control soil. Pseudototal and diethylenetriaminepentaacetic acid （dTPA）-extractable contents of A1, Cr, Cu, fe, Mn, Ni, Pb and Zn were determined in soil samples. The untreated soil had significant limitations for vegetation growth. All the Technosols improved the properties of the mine soil by increasing organic carbon and pH value, but they added Ni, Pb or Zn to the soil. It is advisable to check whether the heavy metal concentrations of the wastes are hazardous or not before adding to soils. It is also necessary to study the effect of these wastes over time and in more areas to conclude if they are actually favourable to restore degraded mine soils.

关键词： heavy metals mine tailing vegetation growth waste amendment

Retention and Mobility of Copper and Lead in Soils as Influenced by Soil Horizon Properties

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Pedosphere 2011年第5期21卷 603-614页

作者： B.CERQUEIRA E.f.COVELO M.L.ANdRAdE f.A.vega department of Plant Biology and Soil Science University of Vigo

The mobility and bioavailability of heavy metals in soils is largely governed by sorption and desorption ***2+ and Pb2+ are among the most potentially toxic heavy metals and they are present,often concomitantly,in many polluting spills and in *** objective was to assess and compare the competitive sorption and desorption capacities and sorption hysteresis of Cu2+ and Pb2+,as well as their migration through the profiles of four natural soils:a Humic Umbrisol,an Umbric Cambisol,an Endoleptic Luvisol and a Humic *** all horizons Pb2+ was invariably sorbed and retained to a greater extent than Cu2+.The sorption and retention of Cu2+ were most in?uenced by pH,e?ective cation exchange capacity(CECe) and Mn oxide *** the other hand,the fixation capacity of Pb2+ was most in?uenced by pH,CECe,and Mn oxide and organic matter *** and CECe were the individual soil properties most markedly in?uencing Cu2+ and Pb2+ sorption and *** all the horizons Pb2+ exhibited greater hysteresis than Cu2+.In each soil the hysteresis in the A horizon was greater than that in the B horizon,except in the Bt horizon of the Endoleptic Luvisol,due to its high pH and vermiculite *** on migration indices,Pb2+ was less mobile than Cu2+ in the studied soils.

关键词： desorption heavy metal hysteresis migration sorption

Colorectal cancer diagnosis: Pitfalls and opportunities

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World Journal of Gastrointestinal Oncology 2015年第12期7卷 422-433页

作者： Pablo vega fátima Valentín Joaquín Cubiella department of Gastroenterology Complexo Hospitalario Universitario de Ourense

Colorectal cancer(CRC) is a major health problem in the Western world. The diagnostic process is a challenge in all health systems for many reasons: There are often no specific symptoms; lower abdominal symptoms are very common and mostly related to nonneoplastic diseases, not CRC; diagnosis of CRC is mainlybased on colonoscopy, an invasive procedure; and the resource for diagnosis is usually scarce. furthermore, the available predictive models for CRC are based on the evaluation of symptoms, and their diagnostic accuracy is limited. Moreover, diagnosis is a complex process involving a sequence of events related to the patient, the initial consulting physician and the health system. Understanding this process is the first step in identifying avoidable factors and reducing the effects of diagnostic delay on the prognosis of CRC. In this article, we describe the predictive value of symptoms for CRC detection. We summarize the available evidence concerning the diagnostic process, as well as the factors implicated in its delay and the methods proposed to reduce it. We describe the different prioritization criteria and predictive models for CRC detection, specifically addressing the two-week wait referral guideline from the National Institute of Clinical Excellence in terms of efficacy, efficiency and diagnostic accuracy. finally, we collected information on the usefulness of biomarkers, specifically the faecal immunochemical test, as non-invasive diagnostic tests for CRC detection in symptomatic patients.

关键词： Colorectal cancer Colonoscopy Primary health care

Associations between testicular development and fetal size in the pig

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Journal of Animal Science and Biotechnology 2022年第5期13卷 1340-1350页

作者： Claire Stenhouse Yennifer cortes-Araya f.Xavier donadeu Cheryl J.Ashworth functional Genetics and development division The Roslin Institute and Royal(Dick)School of Veterinary StudiesUniversity of EdinburghMidlothianUK department of Animal Science Texas A&M University440 Kleberg CenterCollege StationTX 77843-2471USA

Background:Impaired reproductive performance is the largest contributing factor for the removal of boars from commercial *** growth restricted piglets represent 25%of the total number of piglets born and have impaired reproductive *** study aimed to improve the understanding of temporal changes in testicular gene expression during testes development in fetuses of different *** lightest and closest to mean litter weight(CTMLW)male Large White×Landrace littermates were collected at gestational days(Gd)45,60 and 90(n=5-6 litters/Gd).Results:Testes weight and testes weight as a percentage of fetal weight were not associated with fetal size at Gd60 or *** plasma testosterone was not associated with fetal size at *** was no association between fetal size and seminiferous tubule area and number,number of germ or Sertoli cells per *** lightest fetuses tended to have wider seminiferous tubules compared to the CTMLW fetuses at Gd90(P=0.077).The testicular expression of KI67(P≤0.01)and BAX:BCL2 ratio(P=0.058)mRNAs decreased as gestation *** SPP1 mRNA expression was observed at Gd60 when compared with Gd45 and 90(P≤0.05).Lower expression of dMRT1 and SPP1(Pd in testes associated with the lightest fetuses compared to the CTMLW fetuses at ***:These findings provide novel insights into the expression profiles of genes associated with testicular development and ***,these data suggest that programming of reproductive potential in IUGR boars occurs late in gestation,providing a platform for further mechanistic investigation.

关键词： fetal growth Intrauterine growth restriction(IUGR) Porcine Pregnancy Testes

Anti-amyloid antibodies in Alzheimer’s disease: what did clinical trials teach us?

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Neural Regeneration Research 2025年第4期20卷 1092-1093页

作者： danko Jeremic Lydia Jiménez-díaz Juan d.Navarro-López NeuroPhysiology&Behavior Lab University of Castilla-La ManchaBiomedical Research Center(CRIB)School of Medicine of Ciudad RealCiudad RealSpain

Although many causes of Alzheimer’s disease(Ad)may exist,both the original amyloid cascade and tau hypotheses posit that abnormal misfolding and accumulation of amyloid-β(Aβ)and tau protein is the central event causing the ***,that conclusion could be only partly true,and there is conflicting evidence about the role of both proteins in Ad,being able to precede and influence one *** researchers argue that these proteins are mere executors rather than primary causes of ***,there have been continuing refinements of both hypotheses,with alternative explanations proposed.Aβand tau proteins may be independently involved in specific neurotoxic pathways;yet there may be other crucial processes going on in early ***,accumulating evidence suggests that Aβand tau act synergistically,rather than additively in disease onset(Jeremic et al.,2021,2023a).

关键词： amyloid Alzheimer additive