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journal of rare Earths 2023年第8期41卷 1217-1224,I0004页

作者： j.s.Uribe-Chavira G.Herrera-Pérez C.r.santillán-rodríguez r.j.sáenz-hernández j.A.Matutes-Aquino M.C.Grijalva-Castillo Materials Physics Department Centro de Investigación en Materiales AvanzadosS.C.Miguel de Cervantes 120Chihuahua31136ChihMexico CONACYT–Centro de Investigación en Materiales Avanzados S.C.Miguel de Cervantes 120Chihuahua31136ChihMexico

Fe_(81)Al_(19) polycrystalline alloys doped with Tb(0-0.25 at%) were obtained by arc *** introduction of Tb favors the formation of columnar grains in the micro structure of the alloys,which develops a texture in the [100]crystal *** examination shows that the alloys are composed in great proportion by the disordered body-centered cubic(bcc),A2 phase and by a small proportion of the ordered bcc,B2 *** a consequence of doping with Tb,the lattice parameter increases,so the calculated apparent crystallite size increases,indicating a decrease in dislocation density and therefore in *** change in the magnetostriction with the magnetic field,dλ_(T)/dH,is directly related to strain anisotropy that can favor the iron easy magnetization axis on the [100] *** increase in total magnetostriction is found in the doped alloys with a maximum of 90 × 10^(-6) at 300 K for the alloy containing 0.027 at% *** enhancement is a threefold value of the undoped alloy,which is attributed to the smaller maximum strain value and the preferential orientation formation by the columnar grains.

关键词： FeAl alloy Magnetostriction rietveld refinement Microstrains Preferred orientation rare earths

Women in visual neural regeneration research

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Neural regeneration research 2025年第2期20卷 489-490页

作者： Tonia s.rex David j.Calkins Vanderbilt Eye Institute Vanderbilt University Medical CenterNashvilleTNUSA

The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of *** take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this *** National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in ***,we focus on this *** sources included PubMed,the National science Foundation(NsF),the NEI,the Blue ridge Institute for Medical research and data from the major professional organization for eye and vision research,the Association for research in Vision and Ophthalmology(ArVO).

关键词： neural visual Times

Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing sMN1 delivery to correct all neurological and systemic perturbations

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Neural regeneration research 2025年第7期20卷 2011-2012页

作者： sharon j.Brown rafael j.Yáñez-Muñoz Heidi r.Fuller school of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

spinal muscular atrophy(sMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of sMA was understood in 1995 when loss or impairment of the survival motor neuron 1(sMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,sMN2,which can produce low levels(approximately 10%)of the full-length functional sMN protein,has led to the generation of sMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,sMN2 copy number is used as a proxy for the prediction of disease severity,with higher sMN2 copy number typically being associated with reduced severity of sMA,although this relationship is not absolute:some individuals with low sMN2 copy number have less severe sMA phenotypes and vice ***,the etiology of sMA is further complicated by other factors,such as non-typical nucleotide variants and sMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

Internal dispersal of seed-inhabiting insects by vertebrate frugivores:a review and prospects

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Integrative Zoology 2011年第3期6卷 213-221页

作者： Ángel hernÁndez Department of Agroforestry University of ValladolidPalenciaSpain

The finding that some seed-inhabiting insects can survive passage through the entire digestive tract of seed-dispersing vertebrates is relatively recent,but evidence suggests that it does ***,I document this phenomenon,discuss its qualitative and quantitative dimensions,and offer suggestions for further *** few documented cases that I review include plant species belonging to different families,with varied fleshy fruit types,number of seeds per fruit and seed *** vertebrate frugivores involved include passerines that feed on relatively small fruits,and galliforms,and perissodactyls and primates that feed on larger *** seed-inhabiting insects in-volved are the larvae of seed-infesting wasps,parasitoid wasps and seed-infesting *** phenomenon has been verified in open,rural ecosystems in North America and southern Europe,and in tropical and subtropical forests in south *** varied scenarios suggest that the qualitative dimension of the phenomenon is considerably greater than known thus far.A simple method for detecting new events is ***,re-search must also focus on the identity and biology of seed-feeding insects of wild fleshy fruits and their *** survival rates of seed-inhabiting insects after vertebrate gut passage are *** phenomenon generally appears to favor insect dispersal.

关键词： digestion-resistant insects endozoochory frugivory tetratrophic interactions tritrophic interactions

Transcriptional regulation and signaling in Phosphorus starvation: What About Legumes?

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journal of Integrative Plant Biology 2008年第10期50卷 1213-1222页

作者： Oswaldo Valds-López Georgina hernndez Centro de Ciencias Genómicas Centre for Genomic sciences Universidad Nacional Autónoma de Mxico National University of MexicoCuernavaca Morelos 62210 Mxico

The availability of soil phosphorus （P）, an essential element, is one of the most important requirements for plant growth and crop production. The morphological and physiological adaptations evolved by plants to cope with P starvation have been well characterized. several P deficiency plant responses are regulated at the transcriptional level. Microarray analysis has generated valuable information on global gene expression in Arabidopsis thaliana grown under P-stress. Despite the identification of P responsive genes, little is known about the regulation of gene expression changes. Four transcription factors, PHrI, WrKY75, ZAT6 and BHLH32, involved in P starvation signaling have been characterized in Arabidopsis, and signaling pathways are deciphered. This review analyzes the current knowledge of transcriptional regulation of P starvation responses in Arabidopsis vis-a-vis legumes such as lupine, common bean and Medicago truncatula. The knowledge on regulatory and signaling mechanisms involved in P acquisition and use in legumes will be useful for improvement of these crops, which account for a large proportion of the world＇s crop production, providing good nutritional quality feed and food.

关键词： legumes phosphorus starvation responses P starvation signaling pathways transcriptional regulation transcription factors.

Combinatorial therapies for spinal cord injury repair

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Neural regeneration research 2025年第5期20卷 1293-1308页

作者： Carla s.sousa Andreia Monteiro António j.salgado Nuno A.silva Life and Health sciences research Institute(ICVs) School of MedicineUniversity of MinhoCampus de Gualtar-gualtarBragaPortugal ICVs/3B’s Associate Lab PT Government Associated LabCampus de Gualtar-gualtarBragaPortugal

spinal cord injuries have profound detrimental effects on individuals, regardless of whether they are caused by trauma or non-traumatic events. The compromised regeneration of the spinal cord is primarily attributed to damaged neurons, inhibitory molecules, dysfunctional immune response, and glial scarring. Unfortunately, currently, there are no effective treatments available that can fully repair the spinal cord and improve functional outcomes. Nevertheless, numerous pre-clinical approaches have been studied for spinal cord injury recovery, including using biomaterials, cells, drugs, or technological-based strategies. Combinatorial treatments, which target various aspects of spinal cord injury pathophysiology, have been extensively tested in the last decade. These approaches aim to synergistically enhance repair processes by addressing various obstacles faced during spinal cord regeneration. Thus, this review intends to provide scientists and clinicians with an overview of pre-clinical combinatorial approaches that have been developed toward the solution of spinal cord regeneration as well as update the current knowledge about spinal cord injury pathophysiology with an emphasis on the current clinical management.

关键词： electric stimulation neural tissue regeneration neuroprotection polytherapy spinal cord injury

Conifer establishment after the eruption of the Paricutin volcano in central Mexico

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Forest Ecosystems 2022年第1期9卷 71-82页

作者： jesús Eduardo sáenz-Ceja Blanca Lizeth sáenz-Ceja j.Trinidad sáenz-reyes Diego rafael Pérez-salicrup Instituto de Investigaciones en Ecosistemas y sustentabilidad Universidad Nacional Autéonoma de MéxicoAntigua Carretera a Patzcuaro 8701 Col.Ex hacienda San Joséde la Huerta58190MoreliaMexico Escuela Nacional de Estudios superiores Unidad Morelia Universidad Nacional Autónoma de MéxicoAntigua Carretera a Patzcuaro 8701 Col.Ex hacienda San Joséde la Huerta58190MoreliaMexico Instituto Nacional de Investigaciones Forestales Agrícolas y PecuariasCampo Experimental UruapanAv.Latinoamericana 1101Col.Revolución60500UruapanMexico

Background:Volcanic eruptions have large effects on forest ecosystems and create new substrates,triggering primary succession *** Paricutín volcano,born in central-western Mexico,erupted between 1943 and *** the cessation of the eruptive activity,plant colonization began on the lava flows and tephra deposits,including the conifer species that dominate the surrounding mature *** study aims to reconstruct the history of the establishment of conifer trees on the substrates created by the Paricutín ***:16 sampling plots were established along three transects with northern,southern,and south-western aspects,located every 250 m from the preserved forest to the volcanic *** cores from 400 conifer trees were extracted and their age was determined by cross-dating annual tree *** order of the species colonization and the tree establishment,abundance,and dominance patterns were ***,the influence of the distance from the mature forests and the inter-annual climatic conditions on the temporal tree establishment pattern was ***:Eight pine and one fir species have been established since 1970,only 18 years after the end of the eruptive ***,tree establishment increased by 12.9%annually after 1995,with the youngest tree in our sample getting established in *** did not find a well-defined temporal and spatial pattern of species arrival,which suggests that colonization occurred randomly,although the four pine species that were established early became the most abundant and *** establishment was not influenced by the distance from the mature forest,and wet inter-annual conditions did not enhance pulses of tree recruitment,exhibiting a continuous tree establishment ***:Conifer species have shown a great capacity for colonizing volcanic substrates created by the Paricutín eruption,which suggests that tropical montane conifers can regenerate rapidly under high-magni

关键词： Age structure Dendrochronology Lava flow Primary succession Tropical montane forest

Design of multilayer hybrid sol-gel coatings with bifunctional barrier-bioactive response on the Elektron 21 magnesium alloy for biomedical applications

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journal of Magnesium and Alloys 2021年第6期9卷 2097-2112页

作者： K.s.Durán N.hernández L.M.rueda C.A.hernández-Barrios A.E.Coy F.Viejo Grupo de Investigación en Desarrollo y Tecnología de Nuevos Materiales(GIMAT) Universidad Industrial de Santander9 Cra.27Colombia Grupo de Investigación de las Ciencias de las Ingenierías(GICI) Universidad de San BuenaventuraCartagenaCalle Real de TerneraDiagonal 32#30-966Colombia

The present study aims to develop multilayer barrier-bioactive hybrid sol-gel coatings from a mixture of the silane precursors tetraethylorthosilicate(TEOs)and glycidoxypropyltriethoxysilane(GPTMs)deposited on the Elektron 21 magnesium *** purpose of the inner layer(barrier coating)was to provide corrosion protection to the magnesium alloy,whereas the outer layer(bioactive coating)was doped with different Ca and Mg contents to produce a bioactive *** coatings were characterised using scanning electron microscopy(sEM)and their corrosion behaviour was evaluated by anodic polarisation and electrochemical impedance spectroscopy after immersion in simulated body fluid(sBF)at 37±0.5°*** experimental results showed that the multilayer coatings increased the corrosion resistance of the alloy up to three orders of magnitude during immersion in sBF *** the other hand,the presence of Ca and Mg in the bioactive coating promoted the growth of apatite-like ***,an increment of salt content favoured the formation of porous coatings,which allowed the access of the electrolyte to the substrate leading to their rapid *** the latter,this research endorses the premise that the TEOs-GPTMs hybrid system represents a promising alternative to produce bifunctional barrier-bioactive coatings.

关键词： Magnesium bioactivity coating sol-gel EIs corrosion

semileptonic bc to cc and bb to bc baryon decays and heavy quark spin symmetry

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Chinese Physics C 2010年第9期34卷 1364-1367页

作者： j.Nieves j.M.Flynn E.hernández Instituto de Física corpuscular (IFIC) Centro Mixto Universidad de Valencia-CSICInstitutos de Investigación de Paterna school of Physics and Astronomy University of Southampton Departamento de Física Fundamental e IUFFyM Universidad de Salamanca

We study the semileptonic decays of the lowest-lying bc baryons to the lowest-lying cc baryons （Ξ （＊） bc → Ξ （＊） cc and Ω （＊） bc → Ω （＊） cc ）,in the limit m b,m c Λ QCD and close to the zero recoil *** separate heavy quark spin symmetries make it possible to describe all these decays using a single form *** also show how these constraints can be used to test the validity of different quark model *** to bc baryon decays are also discussed.

关键词： heavy quark spin symmetry semileptonic decays constituent quark modelsIf

role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons

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Chinese Physics C 2010年第9期34卷 1488-1490页

作者： C.Albertus E.hernández j.Nieves Departamento de Física Fundamental e IUFFyM Universidad de Salamanca Instituto de Física Corpuscular (IFIC) Centro Mixto CSIC-Universidad de ValenciaInstitutos de Investigación de Paterna

We analyze the effects of hyperfine mixing in b → c semileptonic decays of doubly heavy *** qualitatively confirm the results by *** and *** in ***.A,2009,24： 2401– 2413,finding that mixing has a great impact on those ***,predictions without mixing differ by a factor of 2 and this discrepancy translates to the mixed case where large differences in decay widths are observed between the two calculations.

关键词： doubly-heavy baryons semileptonic decay hyperfine mixing