446 research outputs found

    Desing and development of a robotic platform for the evaluation of search algorithms

    Full text link
    Plant diseases represent a major economic and environmental problem in agriculture and forestry. Upon infection, a plant develops symptoms that affect different parts of the plant causing a significant agronomic impact. As many such diseases spread in time over the whole crop, a system for early disease detection can aid to mitigate the losses produced by the plant diseases and can further prevent their spread [1]. In recent years, several mathematical algorithms of search have been proposed [2,3] that could be used as a non-invasive, fast, reliable and cost-effective methods to localize in space infectious focus by detecting changes in the profile of volatile organic compounds. Tracking scents and locating odor sources is a major challenge in robotics, on one hand because odour plumes consists of non-uniform intermittent odour patches dispersed by the wind and on the other hand because of the lack of precise and reliable odour sensors. Notwithstanding, we have develop a simple robotic platform to study the robustness and effectiveness of different search algorithms [4], with respect to specific problems to be found in their further application in agriculture, namely errors committed in the motion and sensing and to the existence of spatial constraints due to land topology or the presence of obstacles

    Saneamiento básico a través de la implementación de un sistema de alcantarillado en el barrio Villa Rosario y Unión Paraíso en el municipio de Puerto colombia - Departamento del Atlántico

    Get PDF
    In order to continue advancing in the coverage of the sewerage service in the municipality, this study and design has been prepared to establish the necessary works to have the adequate infrastructure to provide a sewerage service with the quality that the community of Villa Rosario and Unión Paraíso in the municipality of Puerto Colombia (Atlántico) require. The design of the alternative consists of the installation of secondary pipes in the Villa Rosario and Unión Paraíso neighborhoods of the municipality of Puerto Colombia, for which 1,641 m of 8-inch diameter networks will be installed, including handles and 129 ml of PEAD pipe of 160mm PN10 PE100 The proposed works will come into operation immediately, as they will be integrated into the existing sewage system in the municipality. The aforementioned works will result in an increase in the quality of life of the Municipality, the environmental sanitation of the area and the reduction of diseases related to sewage, especially in children and the elderly, who are the most vulnerable population.Para seguir avanzando en cobertura del servicio de alcantarillado en el municipio, se ha elaborado el presente estudio y diseño para establecer las obras necesarias para contar con la infraestructura adecuada para prestar un servicio de alcantarillado con la calidad que la comunidad de Villa Rosario y Unión Paraíso en el municipio de Puerto Colombia (Atlántico) requieren. El diseño de la alternativa consiste en la instalación de tuberías secundarias en los barrios Villa Rosario y Unión Paraíso del municipio de Puerto Colombia, para lo cual se instalarán 1641 m de redes de 8 pulgadas de diámetro, incluyendo manijas y 129ml en tubería de PEAD de 160 mm PN 10 PE 100 Las obras propuestas entraran inmediatamente en funcionamiento, al quedar integradas al sistema de alcantarillado existente en el municipio. Las mencionadas obras traerán como consecuencia el aumento de la calidad de vida del Municipio, el saneamiento ambiental de la zona y la disminución de enfermedades relacionadas con las aguas negras, sobre todo en niños y en el adulto mayor que es la población más vulnerable

    Comparing astroglial reactivity in two transgenic mouse models of tauopathy

    Get PDF
    Astrocytes are becoming crucial players in the pathology of neurodegenerative disorders, such as Alzheimer’s disease (AD). Astrocyte responses have been mainly analyzed in the context of amyloid-beta (Abeta) pathology, highlighting their role in the development/progression of amyloidosis and their relationship with the microglial response. Regarding tau pathology, some studies have reported that astrocytes respond to hyperphosphorylated tau (phospho-tau) and suggested their implication on tau transmission/elimination. Here, we aimed to analyze the astroglial reactivity to tau pathology in the hippocampus of two transgenic mouse models of tauopathy, ThyTau22 and P301S. Proteinopathy was assessed by western-blotting and immunohistochemistry using phospho-tau antibodies (AT8). Inflammatory markers (GFAP, Iba-1, CD45, TREM2) were analyzed by qPCR and immunohistochemistry for bright-field microscopy; glial-phospho-tau relationship was analyzed under confocal and transmission electron microscopy. P301S mice exhibited an intense reactive astrogliosis, increasing with aging in parallel to a strong phospho-tau pathology. ThyTau22 model showed a slighter astrocyte reactivity accompanied by a lesser accumulation of phospho-tau. Astrogliosis in P301S mice closely correlated with an acute DAM-like microglial activation, not observed in ThyTau22 hippocampus. Confocal and ultrastructural studies revealed that, in both models, astrocytic processes contained phospho-tau, especially those surrounding blood vessels. Our results support that astrocytes respond to tau pathology in the absence of Abeta. This reactivity highly correlates with phospho-tau pathology and markedly depends on microglial activation. Moreover, astrocytes may play a role in the elimination/spreading of phospho-tau species through the brain. Deciphering the mechanisms underlying these processes might help to develop therapies to slow down the progression of AD.Supported by Instituto de Salud Carlos III (ISCiii) of Spain, co-financed by FEDER funds from European Union through grants PI18/01557 (to AG), PI18/01556 (to JV), and by Junta de Andalucia through Consejería de Economía y Conocimiento grants UMA18-FEDERJA-211 (AG), P18-RT-2233 (AG) and US-1262734 (JV) co-financed by Programa Operativo FEDER2014-2020. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

    La vid silvestre en México. Actualidades y potencial

    Get PDF
    En ocho capítulos se aborda el estado del arte de la vid silvestre en MéxicoEl estudio de las especies vegetales nativas de México representa un reto que cada día más investigadores mexicanos asumen. Durante muchos años, el apoyo a la investigación pública ha sido mínimo; desde el punto de vista agronómico es insuficiente para avanzar a la velocidad que requiere nuestro país para afrontar problemas de producción y distribución de alimentos. Por esa razón, entre otras, me es grato presentar esta obra que compila parte de los trabajos de la Red de Vid Silvestre patrocinada por el Sistema Nacional de Recursos Fitogenéticos (sinarefi) dependiente de la sagarpa; trabajos apuntalados por investigadores que sin pertenecer a la red han colaborado en el estudio de las plantas del género Vitis. En este libro se muestra el potencial del país para aprovechar el recurso vid, empleado desde antes de la conquista española por nativos mexicanos que conocían sus bondades. Es necesario continuar el avance en el conocimiento de este recurso, por ello el presente libro pretende invitar a toda persona interesada en contribuir con el rescate y conservación de las vides mexicanas. Los autores y editores, así como las instituciones en donde laboramos y aquellas que patrocinan estas investigaciones, esperamos se cumpla este objetivo y que el lector, alumno, profesor, investigador, público en general, disfrute esta lectura y, sobre todo, se interese en el recurso VitisSEP, SINAREFI, UAEME

    Allogeneic Stem Cell Transplantation in Mantle Cell Lymphoma; Insights into Its Potential Role in the Era of New Immunotherapeutic and Targeted Therapies: The GETH/GELTAMO Experience

    Get PDF
    Allo-SCT is a curative option for selected patients with relapsed/refractory (R/R) MCL, but with significant NRM. We present the long-term results of patients receiving allo-SCT in Spain from March 1995 to February 2020. The primary endpoints were EFS, OS, and cumulative incidence (CI) of NRM, relapse, and GVHD. We included 135 patients, most (85%) receiving RIC. After a median follow-up of 68 months, 5-year EFS and OS were 47 and 50%, respectively. Overall and CR rates were 86 and 80%. The CI of relapse at 1 and 3 years were 7 and 12%. NRM at day 100 and 1 year were 17 and 32%. Previous ASCT and Grade 3-4 aGVHD were associated with a higher NRM. Grade 3-4 aGVHD, donor type (mismatch non-related), and the time-period 2006-2020 were independently related to worse EFS. Patients from 1995-2005 were younger, most from HLA-identical sibling donors, and were pretreated less. Our data confirmed that allo-SCT may be a curative option in R/R MCL with low a CI of relapse, although NRM is still high, being mainly secondary to aGVHD. The arrival of new, highly effective and low toxic immunotherapeutic or targeted therapies inevitably will relegate allo-SCT to those fit patients who fail these therapies, far away from the optimal timing of treatment

    Seroprevalence and Risk Factors Possibly Associated with Emerging Zoonotic Vaccinia Virus in a Farming Community, Colombia

    Get PDF
    In 2014, vaccinia virus (VACV) infections were identified among farmworkers in Caquetá Department, Colombia; additional cases were identified in Cundinamarca Department in 2015. VACV, an orthopoxvirus (OPXV) used in the smallpox vaccine, has caused sporadic bovine and human outbreaks in countries such as Brazil and India. In response to the emergence of this disease in Colombia, we surveyed and collected blood from 134 farmworkers and household members from 56 farms in Cundinamarca Department. We tested serum samples for OPXV antibodies and correlated risk factors with seropositivity by using multivariate analyses. Fifty-two percent of farmworkers had OPXV antibodies; this percentage decreased to 31% when we excluded persons who would have been eligible for smallpox vaccination. The major risk factors for seropositivity were municipality, age, smallpox vaccination scar, duration of time working on a farm, and animals having vaccinia-like lesions. This investigation provides evidence for possible emergence of VACV as a zoonosis in South America.https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000318507https://scholar.google.com.co/citations?user=cU2KyT4AAAAJ&hl=enhttps://scienti.minciencias.gov.co/gruplac/jsp/visualiza/visualizagr.jsp?nro=00000000008981https://orcid.org/0000-0002-8093-054

    Aberrant upregulation of the glycolytic enzyme PFKFB3 in CLN7 neuronal ceroid lipofuscinosis

    Get PDF
    CLN7 neuronal ceroid lipofuscinosis is an inherited lysosomal storage neurodegenerative disease highly prevalent in children. CLN7/MFSD8 gene encodes a lysosomal membrane glycoprotein, but the biochemical processes affected by CLN7-loss of function are unexplored thus preventing development of potential treatments. Here, we found, in the Cln7∆ex2 mouse model of CLN7 disease, that failure in autophagy causes accumulation of structurally and bioenergetically impaired neuronal mitochondria. In vivo genetic approach reveals elevated mitochondrial reactive oxygen species (mROS) in Cln7∆ex2 neurons that mediates glycolytic enzyme PFKFB3 activation and contributes to CLN7 pathogenesis. Mechanistically, mROS sustains a signaling cascade leading to protein stabilization of PFKFB3, normally unstable in healthy neurons. Administration of the highly selective PFKFB3 inhibitor AZ67 in Cln7∆ex2 mouse brain in vivo and in CLN7 patients-derived cells rectifies key disease hallmarks. Thus, aberrant upregulation of the glycolytic enzyme PFKFB3 in neurons may contribute to CLN7 pathogenesis and targeting PFKFB3 could alleviate this and other lysosomal storage diseases

    Relative Efficacy of AS03-Adjuvanted Pandemic Influenza A(H1N1) Vaccine in Children: Results of a Controlled, Randomized Efficacy Trial

    Get PDF
    Background. the vaccine efficacy (VE) of 1 or 2 doses of AS03-adjuvanted influenza A(H1N1) vaccine relative to that of 2 doses of nonadjuvanted influenza A(H1N1) vaccine in children 6 months to <10 years of age in a multinational study conducted during 2010-2011.Methods. A total of 6145 children were randomly assigned at a ratio of 1: 1: 1 to receive 2 injections 21 days apart of A/California/7/2009(H1N1)-AS03 vaccine at dose 1 and saline placebo at dose 2, 2 doses 21 days apart of A/California/7/2009(H1N1)-AS03 vaccine (the Ad2 group), or 2 doses 21 days apart of nonadjuvanted A/California/7/2009(H1N1) vaccine (the NAd2 group). Active surveillance for influenza-like illnesses continued from days 14 to 385. Nose and throat samples obtained during influenza-like illnesses were tested for A/California/7/2009 (H1N1), using reverse-transcriptase polymerase chain reaction. Immunogenicity, reactogenicity, and safety were assessed.Results. There were 23 cases of confirmed 2009 pandemic influenza A(H1N1) (A[H1N1]pdm09) infection for the primary relative VE analysis. the VE in the Ad2 group relative to that in the NAd2 group was 76.8% (95% confidence interval, 18.5%-93.4%). the benefit of the AS03 adjuvant was demonstrated in terms of the greater immunogenicity observed in the Ad2 group, compared with the NAd2 group.Conclusion. the 4-8-fold antigen-sparing adjuvanted pandemic influenza vaccine demonstrated superior and clinically important prevention of A(H1N1)pdm09 infection, compared with nonadjuvanted vaccine, with no observed increase in medically attended or serious adverse events. These data support the use of adjuvanted influenza vaccines during influenza pandemics.GlaxoSmithKline BiologicalsUniv Melbourne, Murdoch Childrens Res Inst, Carlton, Vic 3010, AustraliaUniv Melbourne, Melbourne Sch Populat & Global Hlth, Carlton, Vic 3010, AustraliaGlaxoSmithKline Vaccines, King of Prussia, PA USANovavax, Rockville, MD USAMary Chiles Gen Hosp, Dept Pediat, Manila, PhilippinesDe La Salle Hlth Sci Inst, Dept Pediat, Dasmarinas City, PhilippinesRes Inst Trop Med, Dept Hlth, Muntinlupa, PhilippinesUniversidade Federal de São Paulo, Dept Pediat, São Paulo, BrazilFac Ciencias Med Santa Casa São Paulo, Dept Pediat, São Paulo, BrazilAssoc Fundo Incent Pesquisa, São Paulo, BrazilInst Costarricense Invest Clin, San Jose, Costa RicaNatl Inst Publ Hlth Mexico, Cuernavaca, Morelos, MexicoUniv Autonoma Nuevo Leon, Serv Med, Monterrey, MexicoInst Nacl Pediat Mexico, Mexico City, DF, MexicoHosp Gen Durango, Durango, MexicoPhramongkutklao Hosp, Infect Dis Unit, Dept Pediat, Bangkok, ThailandKhon Kaen Univ, Dept Pediat, Fac Med, Khon Kaen, ThailandNatl Healthcare Grp Polyclin, Singapore, SingaporeCtr Estudios Infect Pediat, Cali, ColombiaGlaxoSmithKline Vaccines, Wavre, BelgiumGlaxoSmithKline Vaccines, Rixensart, BelgiumUniversidade Federal de São Paulo, Dept Pediat, São Paulo, BrazilWeb of Scienc
    corecore