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latest developments in early diagnosis and specific treatment of severe influenza infection

Journal of Intensive Medicine 2024年第2期4卷 160-174页

作者： Francisco Valenzuela-Sánchez Blanca Valenzuela-Méndez juan Francisco Rodríguez-Gutiérrez Ángel Estella Intensive care Unit University Hospital of JerezRonda de Circunvalación s/nJerez de la FronteraSpain Haematology department University Hospital of JerezRonda de Circunvalación s/nJerez de la FronteraSpain centro de Investigación Biomédica en Red Enfermedades respiratoriasCIBERESInstituto de Salud Carlos IIIAv.de Monforte de LemosMadridSpain department of Oncological Surgery Institut du Cancer de Montpellier(ICM)Parc Euromédecine208 Av.des ApothicairesMontpellierFrance department of Medicine Faculty of MedicineUniversity of CádizCalle Doctor MarañónCádizSpain Instituto de Investigación e Innovación Biomédica de cádiz(INIBicA) Avenida Ana de Viya 21CádizSpain

Influenza pandemics are unpredictable recurrent events with global health,economic,and social *** objective of this review is to provide an update on the latest developments in early diagnosis and specific treatment of the disease and its complications,particularly with regard to respiratory organ *** advances in treatment,the rate of mortality in the intensive care unit remains approximately 30%.Therefore,early identification of potentially severe viral pneumonia is extremely important to optimize treatment in these *** pathogenesis of influenza virus infection depends on viral virulence and host ***,in some patients,it is associated with an excessive systemic response mediated by an authentic cytokine *** process leads to severe primary pneumonia and acute respiratory distress *** prognostication in the emergency department based on comorbidities,vital signs,and biomarkers(e.g.,procalcitonin,ferritin,human leukocyte antigen-DR,mid-regional proadrenomedullin,and lactate)is *** of these biomarkers on admission may facilitate clinical decision-making to determine early admission to the hospital or the intensive care *** decisions are reached considering pathophysiological circumstances that are associated with a poor prognosis(e.g.,bacterial co-infection,hyperinflammation,immune paralysis,severe endothelial damage,organ dysfunction,and septic shock).Moreover,early implementation is important to increase treatment *** on a limited level of evidence,all current guidelines recommend using oseltamivir in this *** possibility of drug resistance should also be *** options include other antiviral drugs and combination therapies with monoclonal ***,it is not recommended to use corticosteroids in the initial treatment of these ***,the implementation of supportive measures for respiratory failure is ***

关键词： Influenza Pandemic Respiratory failure Acute respiratory distress syndrome Intensive care unit admission

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Soil organic carbon stocks in native forest of Argentina:a useful surrogate for mitigation and conservation planning under climate variability

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Ecological Processes 2024年第1期13卷 3-24页

作者： Pablo L.Peri juan Gaitán Matías Mastrangelo Marcelo Nosetto Pablo E.Villagra Ezequiel Balducci Martín Pinazo Roxana P.Eclesia Alejandra Von Wallis Sebastián Villarino Francisco Alaggia Marina González Polo Silvina Manrique Pablo A.Meglioli Julián Rodríguez-Souilla Martín Mónaco Jimena E.chaves Ariel Medina Ignacio Gasparri Eugenio Alvarez Arnesi María Paula Barral Axel von Müller Norberto M.Pahr Josefina Uribe Echevarria Pedro Fernández Marina Morsucci Dardo López juan Manuel cellini Leandro Alvarez Ignacio Barberis Hernán colomb Ludmila la Manna Sebastián Barbaro cecilia Blundo Ximena Sirimarco laura cavallero Gualberto Zalazar Guillermo Martínez Pastur Instituto Nacional de Tecnología Agropecuaria (INTA) Universidad Nacional de la Patagonia Austral (UNPA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad Nacional de Luján Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Grupo de Estudio de Agroecosistemas y Paisajes Rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET ) ccT San Luis Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto Argentino de Nivología Glaciología y Ciencias Ambientales (IANIGLA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Universidad Nacional de Cuyo Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Instituto de Investigaciones en Energía No convencional CCT Salta-JujuyConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) laboratorio de Recursos Agroforestales Centro Austral de Investigaciones Científicas (CADIC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) Dirección Nacional de Bosques Ministerio de Ambiente y Desarrollo Sostenible de la Nación Instituto de Ecología Regional Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )Universidad Nacional de Tucumán Universidad Nacional de Rosario Instituto de Investigaciones en Ciencias Agrarias de Rosario Centro Científico Tecnológico CONICET Grupo de Estudio de Agroecosistemas y Paisajes Rurales (GEAP) Universidad Nacional de Mar del Plata Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET ) laboratorio de Investigaciones en Maderas (LIMAD) Universidad Nacional de La Plata (UNLP) Administración de Parques Nacionales (APN) Parque Nacional Los Alerces centro de Estudios Ambientales Integrados (cEAI) Universidad Nacional de la Patagonia San Juan Bosco (UNPASJB) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET )

Background The nationally determined contribution（NDc） presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United Nations Framework conven-tion on climate change（UNFccc） on the reduction of emissions derived from deforestation and forest degradation, as well as forest carbon conservation（REDD+）. In addition, climate change constitutes one of the greatest threats to forest biodiversity and ecosystem services. However, the soil organic carbon（SOc） stocks of native forests have not been incorporated into the Forest Reference Emission Levels calculations and for conservation planning under cli-mate variability due to a lack of information. The objectives of this study were:（i） to model SOc stocks to 30 cm of native forests at a national scale using climatic, topographic and vegetation as predictor variables, and（ii） to relate SOc stocks with spatial–temporal remotely sensed indices to determine biodiversity conservation concerns due to threats from high inter-annual climate *** We used 1040 forest soil samples（0–30 cm） to generate spatially explicit estimates of SOc native forests in Argentina at a spatial resolution of approximately 200 m. We selected 52 potential predictive environmental covari-ates, which represent key factors for the spatial distribution of SOc. All covariate maps were uploaded to the Google Earth Engine cloud-based computing platform for subsequent modelling. To determine the biodiversity threats from high inter-annual climate variability, we employed the spatial–temporal satellite-derived indices based on Enhanced Vegetation Index（EVI） and land surface temperature（LST） images from landsat *** SOc model（0–30 cm depth） prediction accounted for 69% of the variation of this soil property across the whole native forest coverage in Argentina. Total mean SOc stock reached 2.81 Pg c（2.71–2.84 Pg c with a probability of 90%） for a total area of 460,790 km2,

关键词： Soil organic carbon Biodiversity Native forest climate change mitigation Modelling Resilience

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Lesser kestrels of the same colony do not overwinter together

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current Zoology 2024年第4期70卷 505-512页

作者： Jorge Garcia-Macia Munir chaouni Sara Morollon Javier Bustamante Lina Lopez-Ricaurte juan Martinez-Dalmau Beatriz Rodriguez-Moreno and Vicente Urios Grupo de Investigacion Zoologia de Vertebrados Universidad de AlicanteApdo.99E-03080 AlicanteSpain department of Wetland Ecology Estacion Biologica de Donana(CSIC)C/Americo Vespucio 2641092SevillaSpain GREFA C/MontedelPilarS/NE-28220MajadahondaMadridSpain

Migratory connectivity describes the linkage between breeding and nonbreeding sites,having major ecological implications in birds:1 season influence the success of an individual or a population in the following *** studies on migratory connectivity have used large-scale approaches,often considering regional populations,but fine-scale studies are also necessary to understand colony *** lesser kestrel Falco naumanni,an insectivorous migratory raptor which form colonies during the breeding period,was considered to have strong connectivity based on regional ***,no small-scale studies on migratory connectivity have been ***,we GPS(Global Positioning System)-tracked 40 adult lesser kestrels from 15 different Spanish breeding colonies,estimating the overlap index between home ranges and the distance between their *** was found that lesser kestrels from the same breeding colony placed their nonbreeding areas at 347±281 km(mean±standard deviation)away from each other(range=23-990),and their home ranges over-lapped by 38.4±23.6%.No differences between intra-colony and inter-colony metrics were found,which suggests that lesser kestrels from the same breeding cluster do not overwinter together,but they spread out and mixed independently of the colony belonging throughout the nonbreeding range of the ***,this study highlights the importance of performing connectivity studies using fine-scale approaches.

关键词： Falco naumanni GPS telemetry migratory connectivity nonbreeding raptor spatial ecology wintering.

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Sudden openings and gradual closures in canopy cover modulate acclimation, survival, and growth of a shade-tolerant rainforest tree species

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JOURNAL OF FORESTRY RESEARcH 2024年第1期35卷 1-13页

作者： Moretti, Ana Paula Olguin, Flavia Yesica Gauna, juan Marcelo Graciano, corina Univ Nacl la Plata INFIVE CONICET Diagonal 113 495 RA-1900 La Plata Buenos Aires Argentina consejo Nacl Invest cient & Tecn Godoy Cruz 2290 RA-C1425FQB Godoy Cruz Buenos Aires Argentina Univ Nacl Mis Fac Ciencias Forestales Bertoni 124 km 3 RA-3380 Eldorado Misiones Argentina Univ Nacl la Plata Fac Ciencias Agr & Forestales Calle 60 & 118 RA-1900 La Plata Buenos Aires Argentina

Forest disturbances at gap levels are one of the most important events for the regeneration and establishment of intermediate tree species. Abrupt canopy openings expose plants to high light intensity and high evaporative demands that stress shade-acclimated plants. later, the slow closure of gaps reduces light availability to plants established when the incident irradiation was higher. This work evaluated the morphological and physiological acclimation of cabralea canjerana (Vell) Mart. regeneration to sudden and to gradual changes in canopy cover. A pot experiment was carried out with plants exposed to a sudden opening. A few days after the light shock, plants rapidly increased photosynthetic rates and decreased leaf water potential. After two months, plants activated physiological responses at leaf and whole plant levels to high light and water stresses, e.g., increased stomatal conductance, stomatal index and reduction of leaf: fine roots ratio and chlorophyll. After seven months, hydraulic conductivity of petioles and the whole leaf increased, and growth was much higher than plants that remained under the canopy. In a field experiment in gaps in the rainforest, plants acclimated to all canopy covers. Seven years after planting, growth was maximum in open environments within the gaps, even if the canopy closed during the first 20 months after planting. In conclusion, if this species is planted to enrich the rainforest, positions within gaps with lower canopy cover should be chosen and gap closure will not affect growth. To manage c. canjerana natural regeneration, the opening of gaps and removal of understory will increase survival and growth without the risk that the stress caused by these sudden openings could lead to the death of seedlings. combining pot and field experiments helps to understand the autecology of trees with particular ecological interest, and to build sound restoration practices.

关键词： cabralea canjerana Atlantic forest Abiotic stress Regeneration Seedling LIGHT cONDITIONS ATlaNTIc FOREST REGENERATION WATER GAPS RESPONSES SEEDLINGS SIZE ESTABLISHMENT RESTORATION

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clinical profile and outcomes in very elderly patients with atrial fibrillation anticoagulated with rivaroxaban: data from the EMIR study

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Journal of Geriatric cardiology 2024年第7期21卷 723-732页

作者： Francisco Marín Manuel Anguita Sánchez Iñaki Lekuona Marcelo Sanmartín Fernán-dez Vivencio Barrios carlos Perez Muñoz juan cosín-Sales Alejandro IPérez cabeza Vanesa Roldán Schilling carles Rafols Priu Esteban Orenes-Piñero María Asunción Es-teve-Pastor department of cardiology Hospital Clínico Universitario Virgen de la ArrixacaIMIB-ArrixacaUniversity of MurciaCIBERCVMurciaSpain department of cardiology Hospital Reina Sofía CórdobaIMIBICUniversity of CordobaCIBERCVCórdobaSpain Hospital Galdakao-Usansolo BizkaiaSpain department of cardiology Hospital Uni-versitario Ramony CajalCIBERCVMadridSpain department of cardiology University Hospital Ramóny CajalAl-caláUniversityMadridSpain Medical center la capillita Sanlúcar de Barrameda.Private cardiology clinicJerez de la FronteraSpain department of cardiology Hospital Arnau de VilanovaValenciaSpain department of car-diology Virgen de la Victoria University HospitalCIBERCV.MalagaSpain department of Haematology Hospital Clínico Universitario Virgen de la ArrixacaUniversity of MurciaMurciaSpain department of Medical Affairs Bayer HispaniaBarcelonaSpain department of Biochemistry and Molecular Biology-A University of MurciaMurciaSpain

Objectives To analyze the clinical profile,adequacy of treatment with rivaroxaban and outcomes in octogenarians with atrial fibrillation(AF),taking rivaroxaban in clinical *** Observational and non-interventional study that included AF adults recruited from 79 Spanish centers,anticoagulated with rivaroxaban ≥ 6 months before being *** were analyzed according to age(≥ 80 vs.433 patients,453(31.6%) were octogenarians at *** to younger patients,octogenarians had more comorbidities,higher cHA2DS2-VASc(4.5 ± 1.3 vs.3.0 ± 1.4;P cores(2.0 ± 1.0 vs.1.4 ± 1.0;P dequately prescribed in 83.4% of patients,but more frequently in the younger population(71.1% vs.89.1%;P = 0.039).After a mean follow-up of 2.2 ± 0.6 years,annual rates of stroke + systemic embolism + transient ischemic attack,MAcE,cardiovascular death and major bleeding were 1.03%,1.24%,1.03% and 1.75%,respectively,in octogenarian *** for progressive heart failure death and major bleeding,rates of outcomes in octogenarians were similar compared to younger *** octogenarians,the concomitant use of antiplatelet agents and non-severe dementia were independently associated with the development of ischemic stroke,whereas previous coronary revascularization and heart failure with MAcE,and higher HAS-BLED score with major *** In clinical practice,around one third of patients taking rivaroxaban are *** patients have many comorbidities and a high thromboembolic *** that,rates of adverse events remain *** is adequately prescribed in the majority of octogenarians.

关键词： patients atrial bleeding

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Low-cost and Biodegradable Thermoelectric devices Based on van der Waals Semiconductors on Paper Substrates

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Energy & Environmental Materials 2024年第01期7卷 205-210页

作者： Gulsum Ersu carmen Munuera Federico J.Mompean Daniel Vaquero Jorge Quereda Jo?o Elias F.S.Rodrigues Jose A.Alonso Eduardo Flores Jose R.Ares Isabel J.Ferrer Abdullah M.Al-Enizi Ayman Nafady Sruthi Kuriakose Joshua O.Island Andres castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) Nanotechnology Group USAL–Nanolab Univesidad de Salamanca GISc Departamento de Física de Materiales Universidad Complutense de Madrid departamento de Física Aplicada Centro de Investigación y Estudios Avanzados MIRE Group Departamento de Física de Materiales Universidad Autónoma de Madrid Instituto Nicolás cabrera Universidad Autónoma de Madrid department of chemistry College of Science King Saud University department of Physics and Astronomy University of Nevada Las Vegas

We present a method to fabricate handcrafted thermoelectric devices on standard office paper *** devices are based on thin films of WS2,Te,and BP（P-type semiconductors） and TiS3and TiS2（N-type semiconductors）,depo... 详细信息

关键词： paper-based electronics Seebeck effect semiconductors thermoelectrics van der Waals materials

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Presynaptic endoplasmic reticulum architecture and hereditary spastic paraplegia

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Neural Regeneration Research 2024年第3期19卷 485-486页

作者： juan JoséPérez-Moreno Instituto de Biomedicina de Sevilla(IBiS) Hospital Universitario Virgen Del Rocío/CSIC/Universidad de Sevillaand Departamento de Biología CelularFacultad de BiologíaUniversidad de SevillaSevilleSpain

Hereditary spastic paraplegia(HSP)is a clinically and genetically heterogeneous neurodegenerative disorder,characterized primarily by progressive spasticity and weakness in the lower *** ients can also experience peripheral neuropathy,cognitive impairment,and other neurological *** date,more than 80 genes have been implicated in HSP,encompassing various cellular components,although mutations in genes encoding endoplasmic reticulum(ER)-shaping proteins are the most prevalent(Parodi et al.,2017).ER-shaping proteins are generally known for regulating the tubulation and curvation of the ER,but most of them show additional functions,including fusion of ER tubules,microtubule-severing,ER autophagy,lipid droplet synthesis,contact sites with other organelles(Öztürk et al.,2020).This highlights the complexity of studying the role of these proteins and the link between ER function and HSP.

关键词： reticulum endoplasmic

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Male genitourinary schistosomiasis-related symptoms among long-term Western African migrants in Spain: a prospective population-based screening study

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贫困所致传染病(英文) 2024年第2期13卷 29-38页

作者： Roure Sílvia Vallès Xavier Pérez-Quílez Olga López-Mu?oz Israel chamorro Anna Abad Elena Valerio Lluís Soldevila laura Espa?a Sergio Hegazy Alaa H. A. Fernández-Rivas Gema Gorriz Ester Herena Dolores Oliveira Mário Miralles Maria carme conde carmen Montero-Alia juan José Fernández-Pedregal Elia Miranda-Sánchez Jose Llibre Josep M. Isnard Mar Bonet Josep Maria Estrada Oriol Prat Núria clotet Bonaventura The Schisto-Stop study group International Health Program (PROSIcS) Barcelona North Metropolitan Territorial Directorate for Infectious Diseases Catalan Institute for Health CAP La Salut Passatge dels Encants S/N Badalona Spain Fundació Lluita contra les Infeccions c/Can Ruti s/n Badalona Spain Infectious Diseases department Hospital Universitari Germans Trias i Pujol c/Can Ruti s/n Badalona Spain Germans Trias i Pujol Research Institute c/Can Ruti s/n Badalona Spain Microbiology department Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain department of Genetics and Microbiology Universitat Autònoma de Barcelona c/Can Ruti s/n Badalona Spain Faculty of Medicine University of Asyut El Fateh Assiut Governorate Egypt department of Urology Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain canovelles Primary Health care Unit Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Indústria Canovelles Spain Primary Health care Unit Mataró-(Rocafonda-Palau) Barcelona North Metropolitan Health Directorate Catalan Institute for Health Camí Ral el Ravalet Mataró Barcelona Spain Barcelona North Metropolitan Primary care Directorate Catalan Institute for Health Ctra. de Barcelona Sabadell Barcelona Spain Directorate for Innovation and Interdisciplinary cooperation Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Can Ruti S/N Badalona Spain Irsicaixa-AIDS Research Institute Hospital Universitari Germans Trias i Pujol University Hospital c/Can Ruti s/n Badalona Spain Infectious Diseases Directorate Barcelona North Metropolitan Health Directorate Catalan Institute for Health C/Can Ruti S/N Badalona Spain

Background Schistosomiasis is highly endemic in sub-Saharan Africa and frequently imported to Europe. Male urogenital manifestations are often neglected. We aimed to ascertain the prevalence of genitourinary clinical signs and symptoms among long-term African migrants in a non-endemic European country using a serology *** We carried out a prospective, community-based cross-sectional study of adult male migrants from sub-Saharan Africa living in *** serology tests and microscopic urine examinations were carried out, and clinical data were obtained from an electronic medical record search and a structured *** We included 388 adult males, mean age 43.5 years [Standard deviation (SD) = 12.0, range: 18–76]. The median time since migration to the European Union was 17 [Interquartile range (IQR): 11–21] years. The most frequent country of origin was Senegal (N = 179, 46.1%). Of the 338, 147 (37.6%) tested positive forSchistosoma. Parasite eggs were present in the urine of only 1.3%. Nine genitourinary clinical items were significantly associated with positiveSchistosoma serology results: pelvic pain (45.2%;OR = 1.57, 95%cI: 1.0–2.4), pain on ejaculation (14.5%;OR = 1.85, 95%cI: 1.0–3.5), dyspareunia (12.4%;OR = 2.45, 95%cI: 1.2–5.2), erectile dysfunction (9.5%;OR = 3.10, 95%cI: 1.3–7.6), self-reported episodes of infertility (32.1%;OR = 1.69, 95%cI: 1.0–2.8), haematuria (55.2%;OR = 2.37, 95%cI: 1.5–3.6), dysuria (52.1%;OR = 2.01, 95%cI: 1.3–3.1), undiagnosed syndromic STIs (5.4%), and orchitis (20.7%;OR = 1.81, 95%cI: 1.0–3.1). clinical signs tended to *** Urogenital clinical signs and symptoms are prevalent among male African long-term migrants with a positiveSchistosoma serology results. Genital involvement can be frequent even among those with long periods of non-residence in their sub-Saharan African countries of origin. Further research is needed to develop diagnostic tools and validate therapeutic approaches to

关键词： Schistosomiasis chronic schistosomiasis Urogenital schistosomiasis Male genital schistosomiasis Longterm migrant

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Impact of STAT-signaling pathway on cancer-associated fibroblasts in colorectal cancer and its role in immunosuppression

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1705-1724页

作者： Damián Sánchez-Ramírez Mónica G Mendoza-Rodríguez Omar R Alemán Fernando A candanedo-González Miriam Rodríguez-Sosa juan JoséMontesinos-Montesinos Mauricio Salcedo Ismael Brito-Toledo Felipe Vaca-Paniagua Luis I Terrazas Unidad de Investigacion en Biomedicina Facultad de Estudios Superiores IztacalaUniversidad Nacional Autonoma de MexicoTlalnepantla 54090Estado de MexicoMexico department of Biology Facultad de QuimicaUniversidad Nacional Autonoma de MexicoCiudad UniversitariaMexico City 04510Mexico department of Pathology National Medical Center Century XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico laboratorio de células Troncales Mesenquimales Unidad de Investigación Médica en Enfermedades OncológicasHospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Unidad de Investigacion en Biomedicina y Oncologia Genomica Instituto Mexciano del Seguro SocialMexico City 07300Mexico Servicio de colon y Recto Hospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico laboratorio Nacional en Salud Facultad de Estudios Superiores IztacalaUniversidad Nacional Autónoma de MéxicoTlalnepantla 54090Estado de MexicoMexico

colorectal cancer(cRc)remains one of the most commonly diagnosed and deadliest types of cancer *** displays a desmoplastic reaction(DR)that has been inversely associated with poor prognosis;less DR is associated with a better *** reaction generates excessive connective tissue,in which cancer-associated fibroblasts(cAFs)are critical cells that form a part of the tumor *** are directly involved in tumorigenesis through different ***,their role in immunosuppression in cRc is not well understood,and the precise role of signal transducers and activators of transcription(STATs)in mediating cAF activity in cRc remains *** the myriad chemical and biological factors that affect cAFs,different cytokines mediate their function by activating STAT signaling ***,the harmful effects of cAFs in favoring tumor growth and invasion may be modulated using STAT ***,we analyze the impact of different STATs on cAF activity and their immunoregulatory role.

关键词： cancer-associated fibroblasts Signal transducer and activator of transcription signaling colorectal cancer Immunity Immunosuppression

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Sand attrition in conical spouted beds

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Particuology 2012年第5期10卷 592-599页

作者： Aranzazu R. Fernández-Akarregui Jon Makibar Isabel Alava Luis Diaz Fernando cueva Roberto Aguado Gartzen Lopez Martin Olazar Ikerlan-IK4 Juan de 4 la Cierva 1 Arabako Parke TeknologikoaE-01510 Minao Araba Spain department of chemical Engineering University of the Basque CountryP.O. Box 644 E48080 Bilbao Spai

A study was carried out on the attrition in conical spouted beds using two sands with different properties for several bed heights and gas flow rates. Furthermore, the influence of a draft tube was studied at ambient and high temperatures. The main objective was to acquire knowledge on the attrition of sand beds for biomass pyrolysis in a pilot plant provided with a conical spouted bed reactor. A first-order kinetic equation is proposed for sand attrition in a conical spouted bed at room temperature. The predicted attrition rate constant depends exponentially on excess air velocity over that for minimum spouting. Both the draft tube and temperature increase contribute to reduction of attrition.

关键词： Attritionconical spouted bedDraft tubeSand attrition

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