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Short-term effects of different fire severities on soil properties and Pinus halepensis regeneration

Journal of Forestry Research 2020年第4期31卷 1271-1282页

作者： Federico Romeo Pasquale A.Marziliano maria belén turrión Adele Muscolo Department of Agraria Mediterranea UniversityFeo di Vito89122 Reggio CalabriaItaly

Considering that diverse fire severities can affect soil properties differently,the aim of this study was to examine to what extent changes in soil properties caused by fire could condition seedling *** new approach is for identifying a new fire cause-effect chain to qualify the impacts of fire on soils with the purpose of using fire as a tool in forest management to favour Pinus halepensis *** study area was a reforested *** area which had been crossed by fire for78.8 ha,causing various degrees of *** forest was subdivided into three large areas according to the gravity of crown scorch,[low(LS),medium(MS)and high(HS)severity],on the basis of needle yellowing which usually occurs after exposure to direct *** showed significant differences in soil properties with respect to fire *** the HS area,total nitrogen and carbon were considerably reduced while ash and phosphorus contents significantly *** changes in soil properties,in particular to nutrient levels,affected *** regeneration,mainly the first year after the *** regeneration occurred in areas affected by moderate fire severity in which the temperatures reached increased the mineralization of soil organic matter with the consequent release of nutrients available for seedling ***,moderate fire severity suppressed the regeneration of grasses,reducing the interspecific *** of seedlings were inversely proportional to the density of *** the number was abundant(LS),the height was modest;conversely,where the number was low(HS),the greater hypsometric differentiation of pine seedlings was *** results suggest that moderate fire severity represents an environmental stress(hormesis)altering microscale conditions to increase pine germination and *** exposure of *** to a moderate environmental factor that is damaging at higher intensities,induces an adaptive

关键词： Ecophysiology Fire severity Pinus halepensis Post-fire regeneration Soil chemical properties

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Brain-derived neurotrophic factor signaling in the neuromuscular junction during developmental axonal competition and synapse elimination

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neural Regeneration Research 2025年第2期20卷 394-401页

作者： Josep Tomàs Víctor Cilleros-Mañé Laia Just-Borràs Marta Balanyà-Segura Aleksandra Polishchuk Laura nadal Marta Tomàs Carolina Silvera-Simón Manel M.Santafé maria A.Lanuza Unitat d’Histologia i neurobiologia(UHneurob) Facultat de Medicina i Ciències de la SalutUniversitat Rovira i VirgiliReusSpain

During the development of the nervous system,there is an overproduction of neurons and *** competition between neighboring nerve endings and synapses performing different activity levels leads to their elimination or *** have extensively studied the involvement of the brain-derived neurotrophic factor-Tropomyosin-related kinase B receptor neurotrophic retrograde pathway,at the neuromuscular junction,in the axonal development and synapse elimination process versus the synapse *** purpose of this review is to describe the neurotrophic influence on developmental synapse elimination,in relation to other molecular pathways that we and others have found to regulate this *** particular,we summarize our published results based on transmitter release analysis and axonal counts to show the different involvement of the presynaptic acetylcholine muscarinic autoreceptors,coupled to downstream serine-threonine protein kinases A and C(PKA and PKC)and voltage-gated calcium channels,at different nerve endings in developmental *** dynamic changes that occur simultaneously in several nerve terminals and synapses converge across a postsynaptic site,influence each other,and require careful studies to individualize the mechanisms of specific *** describe an activity-dependent balance(related to the extent of transmitter release)between the presynaptic muscarinic subtypes and the neurotrophin-mediated TrkB/p75nTR pathways that can influence the timing and fate of the competitive interactions between the different axon *** downstream displacement of the PKA/PKC activity ratio to lower values,both in competing nerve terminals and at postsynaptic sites,plays a relevant role in controlling the elimination of supernumerary ***,calcium entry through L-and P/Q-subtypes of voltage-gated calcium channels(both channels are present,together with the n-type channel in developing nerve terminals)contributes to red

关键词： acetylcholine release adenosine receptors axonal competition brain-derived neurotrophic factor calcium channels motor end-plate muscarinic acetylcholine receptors postnatal synapse elimination serine kinases tropomyosin-related kinase receptorB

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Complementary roles of glial cells in generating region-specific neuroinflammatory responses and phagocytosis in Parkinson’s disease

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neural Regeneration Research 2025年第10期20卷 2917-2918页

作者： Leyre Ayerra maria S.Aymerich Universidad de navarra Facultad de CienciasDepartamento de Bioquímica y GenéticaPamplonaSpain CIMA-Universidad de navarra PamplonaSpain IdiSnA Instituto de Investigación Sanitaria de NavarraPamplonaSpain

neuroinflammation is associated with Parkinson’s disease:Reactive gliosis and neuroinflammation are hallmarks of Parkinson’s disease(PD),a multisystem neurodegenerative disorder characterized by a progressive loss of dopaminergic *** has long been considered a mere consequence of neuronal loss,but whether it promotes PD or is a key player in disease progression remains to be *** leukocyte antigen.

关键词： inflammation leukocyte generating

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Calcium-sensitive protein MLC1 as a possible modulator of the astrocyte functional state

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neural Regeneration Research 2025年第7期20卷 2008-2010页

作者： Elena Ambrosini Angela Lanciotti maria Stefania Brignone Department of neuroscience Istituto Superiore di SanitàRomeItaly

Astrocytes,the main population of glial cells in the central nervous system(CnS),exert essential tasks for the control of brain tissue homeostasis,supporting neuron and other glial cell activity from the developmental stage to adult *** maintain the optimal functionality of the brain,astroglial cells are particularly committed to reacting to every change in tissue homeostatic conditions,from mild modifications of the physiological environment,a process called astrocyte activation,to the more severe alterations occurring in pathological situations causing astrocyte reactivity or reactive astrogliosis(Escartin et al.,2021).During these reactive states,astrocytes mount an active,progressive response encompassing morphological,molecular,and interactional remodeling,leading to the acquisition of new functions and the loss of others,whose intensity,duration,and reversibility are dependent on the nature of the stimulus and regulated in a context-specific manner.

关键词： alterations modulator maintain

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Lower and upper motor neuron involvement and their impact on disease prognosis in amyotrophic lateral sclerosis

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neural Regeneration Research 2022年第1期17卷 65-73页

作者： maria n.Zakharova Anna A. Abramova Research Center of neurology MoscowRussia

Amyotrophic lateral sclerosis is a fatal neurodegenerative disease characterized by progressive muscle wasting,breathing and swallowing difficulties resulting in patient’s death in two to five years after disease *** amyotrophic lateral sclerosis,both upper and lower motor neurons of the corticospinal tracts are involved in the process of neurodegeneration,accounting for great clinical heterogeneity of the *** phenotype has great impact on the pattern and rate of amyotrophic lateral sclerosis progression and overall survival *** more homogenous patient groups in order to study the effects of drug agents on specific manifestations of the disease is a challenging issue in amyotrophic lateral sclerosis clinical *** amyotrophic lateral sclerosis has low incidence rates,conduction of multicenter trials requires certain standardized approaches to disease diagnosis and *** review focuses on the current approaches in amyotrophic lateral sclerosis classification and staging system based on clinical examination and additional instrumental methods,highlighting the role of upper and lower motor neuron involvement in different phenotypes of the *** demonstrate that both clinical and instrumental findings can be useful in evaluating severity of upper motor neuron and lower motor neuron involvement and predicting the following course of the *** disease heterogeneity in amyotrophic lateral sclerosis clinical trials could lead to study designs that will assess drug efficacy in specific patient groups,based on the disease pathophysiology and spatiotemporal *** clinical evaluation can be a sufficient screening method for dividing amyotrophic lateral sclerosis patients into clinical subgroups,we provide proof that instrumental studies could provide valuable insights in the disease pathology.

关键词： amyotrophic lateral sclerosis biomarkers of progression classification diagnostic biomarkers disease heterogeneity electrodiagnostic medicine electromyography motor neuron disease neuroimaging

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Cadmium sorption by sodium and thiourea-modified zeolite-rich tuffs

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Journal of Environmental Sciences 2017年第2期29卷 39-48页

作者： Perfecto Barragán P M.Guadalupe Macedo M maria T.Olguín Instituto Tecnologico de Toluca Laboratorio de Investigacion en Ingenieria Ambiental.Av.Tecnologico S/NColonia Ex-Rancho La VirgenMetepecEstado de Meico CP.52140Mexico Instituto national de Investigaciones nucleares Departamento de QuimicaA.P.18-1027Col.EseandonDelegacion Miguel Hidalgo C.P.11801Mexico

In the present investigation, two zeolite-rich tuffs from Guaymas and El Cajon（State of Sonora）, which were conditioned with a sodium chloride solution and subsequently modified with a thiourea solution, were chosen to evaluate the removal of Cd from aqueous systems. The zeolitic materials were characterized by scanning electron microscopy and X-ray diffraction. The surface area was also determined. The experiments were performed in a batch system, and the influences of p H, contact time between phases, and the concentration of Cd in the solution on the adsorption by sodium or thiourea-modified zeolite-rich tuff were investigated. It was found that the efficiency of Cd ion removal from aqueous solutions is influenced by the p H of the aqueous systems. The Cd adsorption kinetic data were well fitted to a pseudo-second-order model in all cases. The Langmuir and Langmuir–Freundlich isotherms adequately described the Cd sorption behavior by the zeolite from El Cajon pretreated with na Cl and the zeolite from Guaymas modified with thiourea, respectively.

关键词： Cadmium Zeolite-rich-tuff Sorption Kinetics Isotherms

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Treatment of spinal cord injury with biomaterials and stem cell therapy in non-human primates and humans

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neural Regeneration Research 2025年第2期20卷 343-353页

作者： Ana Milena Silva Olaya Fernanda Martins Almeida Ana maria Blanco Martinez Suelen Adriani Marques PhD Program in Pathological Anatomy Federal University of Rio de JaneiroRio de JaneiroBrazil Biomedical Science Institute Federal University of Rio de JaneiroRio de JaneiroBrazil Graduate Program in Pathological Anatomy Federal University of Rio de JaneiroRio de JaneiroBrazil Graduate Program in Pathological Anatomy(PPGAP/UFRJ) Department of Neurobiology/Institute of BiologyCampus do GragoatáNiteróiRio de JaneiroBrazil

Spinal cord injury results in the loss of sensory,motor,and autonomic functions,which almost always produces permanent physical ***,in the search for more effective treatments than those already applied for years,which are not entirely efficient,researches have been able to demonstrate the potential of biological strategies using biomaterials to tissue manufacturing through bioengineering and stem cell therapy as a neuroregenerative approach,seeking to promote neuronal recovery after spinal cord *** of these strategies has been developed and meticulously evaluated in several animal models with the aim of analyzing the potential of interventions for neuronal repair and,consequently,boosting functional *** the majority of experimental research has been conducted in rodents,there is increasing recognition of the importance,and need,of evaluating the safety and efficacy of these interventions in non-human primates before moving to clinical trials involving therapies potentially promising in *** article is a literature review from databases(PubMed,Science Direct,Elsevier,Scielo,Redalyc,Cochrane,and nCBI)from 10 years ago to date,using keywords(spinal cord injury,cell therapy,non-human primates,humans,and bioengineering in spinal cord injury).From 110 retrieved articles,after two selection rounds based on inclusion and exclusion criteria,21 articles were ***,this review arises from the need to recognize the experimental therapeutic advances applied in non-human primates and even humans,aimed at deepening these strategies and identifying the advantages and influence of the results on extrapolation for clinical applicability in humans.

关键词： bioengineering biomaterials cell therapy humans non-human primates spinal cord injury stem cell therapy

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Mind the gap among patches in arid plant communities:rapid root proliferation in response to n addition

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Journal of Plant Ecology 2019年第1期12卷 89-95页

作者： maria Fernanda Reyes Martín RAguiar Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura(IFEVA)and Consejo nacional de Investigaciones Científicas y Técnicas(COnICET) Universidad de Buenos AiresAv.San Martín 4453Buenos Aires C1417DSEArgentina

Aims In arid communities,it has been proposed that individual plants can extend their roots beyond their canopy exploring neighbour-ing bare ground *** becomes relevant in systems where the vegetation is distributed in patches surrounded by bare ***,whether roots of different species may be overlapping under bare ground areas is still *** factors control-ling root responses when no plants appear to be directly influ-encing the gap among patches are still *** aim of our study was to detect perennial grasses responses to an n enrich-ment *** In a semi-arid steppe(Patagonia,Argentina),we buried root traps filled with sieved soil with and without n addition,under bare soil *** were harvested after 4 and 6 *** neighbour-hoods(30 cm in diameter)included at least three of the dominant tussock *** harvests,we identified species in the traps by root traits and quantified diversity,biomass and specific relative growth *** Findings Bare ground areas show simultaneous root growth of different *** of perennial grass roots was higher with n addition than without it in the first harvest(4 months),but this difference disappeared in the second harvest(6 months).Root biomass was maximal after 6 months in n addition *** preferred by herbivores(Bromus pictus and Poa ligularis)showed rapid growth and responses to n *** between harvests may be an indicative that n pulses interact with rising temperatures and soil water content as growing season progress.

关键词： belowground community ecology grass species roots Patagonian steppe patchiness root growth rates zone of influence

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Home range variability,spatial aggregation,and excursions of Akodon azarae and Oligoryzomys flavescens in Pampean agroecosystems

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Integrative Zoology 2020年第5期15卷 401-415页

作者： Irene GOROSITO Ailén BEnÍTEZ maria BUSCH Laboratorio de Ecología de PoblacionesFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina Laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina Laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina

Rodents are reservoirs of various types of hantavirus,some of which are agents of hantavirus pulmonary syndrome in *** hantavirus is associated with a single rodent host species but successive spill-over events may eventually lead to host-switching and new species’becoming host of a given *** study aims to gain an understanding of the spatial ecology of two hantavirus-host species,Akodon azarae,and Oligoryzomys flavescens,by identifying factors modulating their home range sizes and stability,and by evaluating intra-and interspecific spatial aggregation for these species and a third one—Oxymycterus rufus—living in *** this,eleven capture-mark-recapture surveys were carried out,spanning 22 *** found that *** males have larger and more mobile home ranges than females,independently of the ***,males could likely have a more relevant role in the transmission of hantavirus because of their greater exposure both to a higher number of contacts between individuals and viral contamination of the ***,*** individuals showed negligible displacements of their home range through time,which could limit the range of hantavirus spread in host *** *** is host to Lechiguanas hantavirus(pathogenic to humans)this result encompasses epidemiological relevance,for it may imply the existence of local foci of ***,individuals of both species performed excursions outside their home *** events could enable hantavirus spread over distances beyond the normal range of movements and lead to new hantavirus outbreaks in formerly non-infected rodent populations,favoring the persistence of the virus in nature.

关键词： hantavirus home range intra-and interspecific contact rodent spatial ecology

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Recovering noble metals from waste streams using porous organic frameworks for heterogeneous catalysis

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Science China Chemistry 2024年第11期67卷 3578-3587页

作者： Yu Pan Michelle Åhlén maria Strømme Chao Xu Division of nanotechnology and Functional Materials Department of Materials Science and EngineeringÅngström LaboratoryUppsala UniversityUppsala 75121Sweden State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350117China

Recovering noble metals from waste resources and incorporating them into catalysts stands out as a promising strategy for advancing sustainability within the catalysis field. This review provides a comprehensive overview of recent investigations into noble metal recovery from waste streams, specifically employing porous organic frameworks(POFs). Additionally, the study delves into the utilization of the resultant composites, enriched with noble metals, in heterogeneous catalysis. Moreover, we offer insights into the challenges faced and outline prospects for the practical implementation of extracting noble metal catalysts from waste streams using POFs, aiming to develop cost-effective, sustainable, and efficient heterogeneous catalysts.

关键词： porous organic frameworks noble metal recovery heterogeneous catalysis sustainability

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