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Mechanical Characterisation of Densified Hardwood with Regard to Structural Applications

Journal of Renewable Materials 2020年第9期8卷 1091-1109页

作者： Katharina Müller Walter Sonderegger Oliver Kläusler Michael Klippel Edwin Zea escamilla Institute of Structural Engineering(IBK) Chair of Structural Engineering–Timber StructuresSwiss Federal Institute of Technology ZurichZurich8093Switzerland Swiss Wood Solutions AG 8600 DübendorfSwitzerlandPreviously at Institute for Building Materials(IfB)Chair of Wood Materials ScienceSwiss Federal Institute of Technology ZurichZurich8093Switzerland College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Sustainable Building Center for Corporate Responsibility and SustainabilityUniversity of ZurichZurich8001Switzerland

The demand for high-performance,yet eco-friendly materials is increasing on all scales from small applications in the car industry,instrument or furniture manufacturing to greater dimensions like floorings,balcony furnishings and even *** offers a good choice on all of these scales and can be modified and improved in many different *** this study,two common European hardwood species,Beech(Fagus sylvatica L.)and Ash(Fraxinus excelsior L.)were densified in radial direction by thermo-mechanical treatment and the densified product was investigated in an extensive characterisation series to determine all relevant mechanical *** in the three main directions(longitudinal,tangential,radial)and tension perpendicular to the grain(tangential,radial)were tested and compared to reference specimens with native *** and modulus of elasticity were determined in all *** addition,a Life Cycle Assessment was carried out to evaluate the environmental impact associated to the densification *** experimental investigations showed that strength and stiffness of hardwood in the longitudinal and tangential directions improve significantly by radial densification,whereas some properties in the radial direction *** Life Cycle Assessment showed that artificial wood drying has higher impact than wood ***,the transport distance of the raw material highly influences the environmental impact of the final densified *** paper then also offers an overview of possible applications in structural timber *** hardwood is a viable option as local reinforcement,where high compressive or tensile strength is *** wood densification process offers an alternative to the use of carbon-intense steel components or hardwoods from tropical forests.

关键词： Hardwood densification high-performance construction materials thermo-mechanical treatment mechanical characterisation life cycle assessment timber structures

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Spinal cord injury-induced cognitive impairment: a narrative review

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Neural Regeneration Research 2022年第12期17卷 2649-2654页

作者： Oscar V.Alcántar-Garibay Diego Incontri-Abraham Antonio ibarra Centro de Investigación en Ciencias de la Salud(CICSA) Facultad de Ciencias de la SaludUniversidad Anáhuac México Campus NorteHuixquilucanEstado de MéxicoMéxico

Spinal cord injury is a serious damage to the spinal cord that can lead to life-long *** on its etiology,spinal cord injury can be classified as traumatic or non-traumatic spinal cord ***,the pathology of spinal cord injury can be divided into two phases,a primary injury phase,and a secondary injury *** primary spinal cord injury phase involves the initial mechanical injury in which the physical force of impact is directly imparted to the spinal cord,disrupting blood vessels,axons,and neural cell *** the primary injury,a cascade of secondary events begins,expanding the zone of neural tissue damage,and exacerbating neurological *** injury is a progressive condition characterized by pro-inflammatory cytokines,reactive oxygen species,oxidative damage,excitatory amino acids such as glutamate,loss of ionic homeostasis,mitochondrial dysfunction,and cell *** secondary phase lasts for several weeks or months and can be further subdivided into acute,subacute,and *** of the most frequent and devastating complications developed among the spinal cord injury population is cognitive *** risk of cognitive decline after spinal cord injury has been reported to be 13 times higher than in healthy *** exact etiology of this neurological complication remains unclear,however,many factors have been proposed as potential contributors to the development of this disorder,such as concomitant traumatic brain injury,hypoxia,anoxia,autonomic dysfunction,sleep disorders such as obstructive sleep apnea,body temperature dysregulation,alcohol abuse,and certain *** review focuses on a deep understanding of the pathophysiology of spinal cord injury and its relationship to cognitive *** highlight the main mechanisms that lead to the development of this neurological complication in patients with spinal cord injury.

关键词： autonomic dysfunction cognitive impairment spinal cord injury traumatic brain injury

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Role of oxygen and ammonium ions in silver leaching with thiosulfate–ammonia–cupric ions

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Rare Metals 2014年第2期33卷 225-229页

作者： Valentin ibarra-Galvan Alejandro López-Valdivieso Xiong Tong Yi-Qi Cui Faculty of Chemistry Colima University Minerals Engineering Area Institute of Metallurgy Autonomous University of San Luis Potosi Faculty of Land and Resource Engineering Kunming University of Science and Technology

The dissolution of silver with thiosulfate and copper ions was studied in a batch-stirred reactor at 25 °C in the absence and presence of various ammonium ions and oxygen concentrations in the aqueous solution. Leaching silver with 4 mg L-1oxygen in the aqueous solution requires high concentration of ammonium and thiosulfate ions. High silver dissolution is achieved at pH of high cupric tetraamine concentration, around pH 9.8, but a high degradation of thiosulfate ions is resulted from their oxidation by the presence of oxygen. When the oxygen concentration is below 1 mg L-1, dissolved silver thiosulfate species are fairly stable and the degradation of thiosulfate ions in the aqueous solution is low. Under these conditions,high silver dissolution is attained using low thiosulfate concentration. At the oxygen concentration of 4 mg L-1,dissolved silver thiosulfate species precipitate out of the aqueous solution significantly affecting silver *** of dissolved silver thiosulfate species occurs because of oxidation of the thiosulfate bonding to the silver.

关键词： Silver Thiosulfate leaching Non-cyanide silver leaching Cupric tetraamine Oxygen

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Immunization with Cop-1 promotes neuroprotection and neurogenesis after ischemic stroke

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Neural Regeneration Research 2015年第11期10卷 1733-1734页

作者： Yolanda Cruz Paola Suárez-Meade Antonio ibarra Facultad de Ciencias de la Salud Universidad Anáhuac México Norte Av.Universidad Anáhuac No.46 Col.Lomas Anáhuac C.P.52786 Huixquilucan Edo.de México Proyecto CAMINA A.C. Tlalpan No.4430 Col.Toriello Guerra C.P.14050México City México

Cerebrovascular diseases are considered to be amongst the most serious public health issues,since they are the third leading cause of death（WHO,2014）and the most common cause of disability *** monetary significance is evidenced by the economic burden imposed on health care systems,given that the cost of medical care for a patient that has suffered a stroke is around$25,741US dollars every 5 years（Luengo-Fernandez et al.,2012）.A stroke occurs as a result of a disturbance or interruption of cerebral blood flow that significantly reduces the supply of oxygen and glucose to the neural tissue. Consequently, several cell death mechanisms （secondary lesion mechanisms） such as necrosis, excitotoxicity, free radical production and inflammation are triggered （Castillo, 2000）.

关键词： Immunization with Cop-1 promotes neuroprotection and neurogenesis after ischemic stroke BDNF Figure

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Spinal cord injury： potential neuroprotective therapy based on neural-derived peptides

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Neural Regeneration Research 2016年第11期11卷 1762-1763页

作者： elisa garcía josé mondragón-caso antonio ibarra Facultad de Ciencias de la Salud Universidad Anahuac Mexico Estado de Mexico Mexico

Spinal cord injury （SCI） is a degenerative disease that causes an important neurological impairment, it is a medically complex and life-disrupting condition. SCI has a devastating impact on international health systems due to its irreversible consequences and lack of efficient treatment, affecting mostly young population within their productive years. Global SCI incidence in high-income countries is 40 to 80 new cases per million per year,

关键词： SCI Spinal cord injury GME

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Optimizing urban traffic control using a rational agent

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第12期15卷 1123-1137页

作者： Salvador ibarra-MARTíNEZ José A.CASTN-ROCHA Julio LARIA-MENCHACA Engineering School Autonomous University of Tamaulipas

This paper is devoted to developing and evaluating a set of technologies with the objective of designing a methodology for the implementation of sophisticated traffic lights by means of rational agents. These devices would be capable of optimizing the behavior of a junction with multiple traffic signals, reaching a higher level of autonomy without losing reliability, accuracy, or efficiency in the offered services. In particular, each rational agent in a traffic signal will be able to analyze the requirements and constraints of the road, in order to know its level of demand. With such information, the rational agent will adapt its light cycles with the view of accomplishing more fluid traffic patterns and minimizing the pollutant environmental emissions produced by vehicles while they are stopped at a red light, through using a case-based reasoning(CBR) adaptation. This paper also integrates a microscopic simulator developed to run a set of tests in order to compare the presented methodology with traditional traffic control methods. Two study cases are shown to demonstrate the efficiency of the introduced approach, increasing vehicular mobility and reducing harmful activity for the environment. For instance, in the first scenario, taking into account the studied traffic volumes, our approach increases mobility by 23% and reduces emissions by 35%. When the roads are managed by sophisticated traffic lights, a better level of service and considerable environmental benefits are achieved, demonstrating the utility of the presented approach.

关键词： Rational agents Traffic light control Optimization Traffic mobility

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The influence of elevation on soil properties and forest litter in the Siliceous Moncayo Massif,SW Europe

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Journal of Mountain Science 2016年第12期13卷 2155-2169页

作者： BADIA David RUIZ Alberto GIRONA Antonio MARTI Clara CASANOVA Jose ibarra Paloma ZUFIAURRE Raquel Department of Agricultural and Environmental Sciences Technic School of Agricultural Engineering and Environmental SciencesUniversidad de Zaragoza Department of Geography and Land Management University of Zaragoza Department of Analytical Chemistry Technic School of Agricultural Engineering and Environmental SciencesUniversity of Zaragoza

Understanding the effects of elevation and related factors(climate,vegetation) on the physical and chemical soil properties can help to predict changes in response to future climate or afforestation *** work aims to contribute to the knowledge of soil evolution and the classification of forest soils in relation to elevation in the montane stage,with special attention to podzolization and humus *** northern flank of the Moncayo Massif(Iberian Range,SW Europe) provides a unique opportunity to study a forest soils catena within a consistent quartzitic parent material over a relatively steep elevation *** increasing elevation,pH,base saturation,exchangeable potassium,and fine silt-sized particles decrease significantly,while organic matter,the C/N ratio,soil aggregate stability,water repellency and coarse sand-sized particles increase *** soil profiles shared a set of properties in all horizons:loamy-skeletal particle-size,extreme acidity(pH-H_2O<5.6) and low base saturation(<50%).The most prevalent soil forming processes in the catena include topsoil organic matter accumulation and even podzolization,which increases with *** the upper to lower landscape positions of wooded montane stage of the Moncayo Massif,mull-moder-mor humus and an UmbrisolCambisol-Podzol soil unit sequences were found.

关键词： Montane stage Forest soils Catena Humus forms Podzolization Siliceous Moncayo Massif

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Politicizing Responsible Innovation:Responsibility as Inclusive Governance

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International Journal of Innovation Studies 2017年第1期1卷 20-36页

作者： Andoni Eizagirre Hannot Rodríguez Andoni ibarra Department of Social Sciences Faculty of Humanities and EducationMondragon UniversityDorleta auzoa z/g20540 EskoriatzaSpain Department of Philosophy Faculty of ArtsUniversity of the Basque Country UPV/EHUPaseo de la Universidad 501006 Vitoria‐GasteizSpain Department of Logic and Philosophy of Science Faculty of EducationPhilosophy and AnthropologyUniversity of the Basque Country UPV/EHUTolosa Ave.7020018 Donostia‐San SebastiánSpain

This paper aims to provide the historical and conceptual bases underlying the inclusionary transition of European innovation policy,and critical analysis of the difficulties relating to the political nature of this *** the 50s and 60s of last century,linear innovation models operated on the basis of a clear division of roles among the different actors in innovation and fundamentally economistic‐based *** following decades saw innovation policies progressively recognize the multi‐dimensional and complex nature of innovation and the need to make adjustments,but always in explicit response to the competitiveness *** recent RRI(Responsible Research and Innovation)strategy within the European Union,in contrast,demands opening up the whole innovation process(including values and motivations)to collective decision,i.e.,approaching responsible innovation as inclusive *** paper appraises this important development primarily on the basis of in‐depth analysis of the main policy literature on innovation,and also on the grounds of related academic *** a result,we conclude that the bid for collaboration models cohabits constitutively with another set of dynamics aimed at strengthening centralized and prescriptive forms of *** other words,that inclusionary or political eagerness represented through RRI must grapple with the strategic imperative of competitiveness and economic ***,fundamental tension exists,which should be elucidated in light of the objectives,demands and considerations that are integrated,and cease to be integrated,in innovation dynamics and trajectories.

关键词： Inclusive innovation Responsible Research and Innovation(RRI) Competitiveness Institutional ecosystem

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Brain network correlates of epilepsy occurrence in multiple sclerosis and neuroinflammation

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Neural Regeneration Research 2023年第8期18卷 1717-1718页

作者： Dumitru Ciolac Gabriel Gonzalez-escamilla Yaroslav Winter Vinzenz Fleischer Matthias Grothe Sergiu Groppa Department of Neurology Focus Program Translational NeuroscienceRhine Main Neuroscience Network(rmn2)University Medical Center of the Johannes Gutenberg University MainzMainzGermany State University of Medicine and Pharmacy“Nicolae Testemitanu” ChisinauRepublic of Moldova Department of Neurology Institute of Emergency MedicineChisinauRepublic of Moldova Mainz Comprehensive Epilepsy and Sleep Medicine Center Department of NeurologyJohannes Gutenberg University MainzMainzGermany Department of Neurology Philipps-UniversityMarburgGermany Department of Neurology Heinrich Heine UniversityDüsseldorfGermany

Multiple sclerosis(MS),the most common inflammatory condition of the central nervous system in young adults,is characterized by immunemediated demyelination and neurodegeneration that translate into heterogeneous clin... 详细信息

关键词： epilepsy inflammation sclerosis

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Transcriptional Programs Related to Phytochrome A Function in Arabidopsis Seed Germination

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Molecular Plant 2013年第4期6卷 1261-1273页

作者： Silvia E. ibarra Gabriela Auge Rodolfo A. Sanchez Javier F. Botto IFEVA Facultad de Agronomfa Universidad de Buenos Aires y Consejo Nacional de Investigaciones Cientificas y Tecnicas Av. San Martin 4453 C1417DSECiudad de Buenos Aires Argentina

In Arabidopsis seeds, germination is promoted only by phytochromes, principally phytochrome B （phyB） and phytochrome A （phyA）. Despite the abundant information concerning the molecular basis of phyB signaling downstream of PIF1/PIL5, the signaling network inducing germination by phyA is poorly known. Here, we describe the influence of phyA on the transcriptome of Arabidopsis seeds when germination is induced by a far-red （FR） pulse. The expression of 11% of the genome was significantly regulated by phyA. Most of the genes were up-regulated and the changes noted late （i.e. 5 h after a FR pulse）, whereas changes in down-regulated genes were more abundant earlier （i.e. 0.5 h after a FR pulse）. Auxin- and GA-associated elements were overrepresented in the genes that were modified by phyA. A significant number of genes whose expression was affected by phyA had not been previously reported to be dependent on PIL5. Among them, homozygotic mutant seeds of MYB66, a SAUR-like protein, PIN7, and GASA4 showed an impaired promo- tion of germination by phyA. Natural variation at the transcriptional level was found in early signaling and GA metabolic genes, but not in ABA metabolic and expansin genes between Columbia and Landsberg erecta accessions. Although phyA and phyB/PIL5 signaling pathways share some molecular components, our data suggest that phyA signaling is partially independent of PIL5 when germination is promoted by very low fluences of light.

关键词： transcriptome germination light Arabidopsis seeds PIF1/PIL5 phytochrome A (phyA) phytochrome B (phyB).

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