483 research outputs found

    Influence of additives on decrease of temperature of slag flow from energy coal in wet bottom boiler

    Get PDF
    This paper describes the features of the energy coal combusted in a power plant, its impact on energy production, while the possibility of using natural and secondary raw materials to modify the properties of energy coal. All selected types of additives (fluorspar, de-metallized steelmaking slag (DSS), dolomite, and limestone) in admixture of coal have clearly proved their ability to reduce the pour point of the ash in the laboratory experiments. The highest decrease of the temperature at 5 % of the additive was achieved by fluorspar and dolomite from the temperature of 1 593 °C to the temperature of 1 307 °C. In terms of the economy and the availability of the additives the most suitable seems to be DSS

    Autistic symptoms following herpes encephalitis

    Full text link
    Autism is a childhood onset neurodevelopmental disorder characterized by reciprocal social deficits, communication impairment, and rigid ritualistic interests, with the onset almost always before three years of age. Although the etiology of the disorder is strongly influenced by genes, environmental factors are also important. In this context, several reports have described its association with known medical conditions, including infections affecting the central nervous system. In this report, we describe an 11-year-old Asian youngster who developed the symptoms of autism following an episode of herpes encephalitis. In contrast to previous similar reports, imaging studies suggested a predominant involvement of the frontal lobes. At follow-up after three years, he continued to show the core deficits of autism. This case further supports the role of environmental factors, such as infections, in the etiology of autism, and suggests that in a minority of cases, autistic symptoms can develop in later childhood.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42465/1/787-11-3-142_20110142.pd

    Magnetically aligned dust and SiO maser polarisation in the envelope of the red supergiant VY Canis Majoris

    Get PDF
    International audienceWe use Atacama Large Millimeter/submillimeter Array Band 5 science verification observations of the red supergiant VY CMa to study the polarization of SiO thermal/masers lines and dust continuum at ~1.7 mm wavelength. We analyse both linear and circular polarization and derive the magnetic field strength and structure, assuming the polarization of the lines originates from the Zeeman effect, and that of the dust originates from aligned dust grains. We also discuss other effects that could give rise to the observed polarization. We detect, for the first time, significant polarization (~3%) of the circumstellar dust emission at millimeter wavelengths. The polarization is uniform with an electric vector position angle of 8\sim8^\circ. Varying levels of linear polarization are detected for the J=4-3 28SiO v=0, 1, 2, and 29SiO v=0, 1 lines, with the strongest polarization fraction of ~30% found for the 29SiO v=1 maser. The linear polarization vectors rotate with velocity, consistent with earlier observations. We also find significant (up to ~1%) circular polarization in several lines, consistent with previous measurements. We conclude that the detection is robust against calibration and regular instrumental errors, although we cannot yet fully rule out non-standard instrumental effects. Emission from magnetically aligned grains is the most likely origin of the observed continuum polarization. This implies that the dust is embedded in a magnetic field >13 mG. The maser line polarization traces the magnetic field structure. The magnetic field in the gas and dust is consistent with an approximately toroidal field configuration, but only higher angular resolution observations will be able to reveal more detailed field structure. If the circular polarization is due to Zeeman splitting, it indicates a magnetic field strength of ~1-3 Gauss, consistent with previous maser observations

    Non-cytotoxic 1,2,3-triazole tethered fused heterocyclic ring derivatives display Tax protein inhibition and impair HTLV-1 infected cells

    Get PDF
    Human T cell lymphotropic virus type 1 (HTLV-1) is a human retrovirus that infects approximately 10–20 million people worldwide and causes an aggressive neoplasia (adult T-cell leukemia/lymphoma - ATL). Therapeutic approaches for the treatment of ATL have variable effectiveness and poor prognosis, thus requiring strategies to identify novel compounds with activity on infected cells. In this sense, we initially screened a small series of 25 1,2,3-triazole derivatives to discover cell proliferation inhibitors and apoptosis inducers in HTLV-1-infected T-cell line (MT-2) for further assessment of their effect on viral tax activity through inducible-tax reporter cell line (Jurkat LTR-GFP). Eight promising compounds (02, 05, 06, 13, 15, 21, 22 and 25) with activity ≥70% were initially selected, based on a suitable cell-based assay using resazurin reduction method, and evaluated towards cell cycle, apoptosis and Tax/GFP expression analyses through flow cytometry. Compound 02 induced S phase cell cycle arrest and compounds 05, 06, 22 and 25 promoted apoptosis. Remarkably, compounds 22 and 25 also reduced GFP expression in an inducible-tax reporter cell, which suggests an effect on Tax viral protein. More importantly, compounds 02, 22 and 25 were not cytotoxic in human hepatoma cell line (Huh-7). Therefore, the discovery of 3 active and non-cytotoxic compounds against HTLV-1-infected cells can potentially contribute, as an initial promising strategy, to the development process of new drugs against ATL

    Schistosoma mansoni venom allergen-like proteins:Phylogenetic relationships, stage-specific transcription and tissue localization as predictors of immunological cross-reactivity

    Get PDF
    O artigo encontra-se disponível para download no site do Editor.Submitted by Ana Maria Fiscina Sampaio ([email protected]) on 2019-07-15T18:23:01Z No. of bitstreams: 1 Farias, L.P. Schistosoma mansoni venom...2019.pdf: 1118803 bytes, checksum: 1ddd953840abbbd5d56675c8d6c4fa6e (MD5)Approved for entry into archive by Ana Maria Fiscina Sampaio ([email protected]) on 2019-07-15T18:39:31Z (GMT) No. of bitstreams: 1 Farias, L.P. Schistosoma mansoni venom...2019.pdf: 1118803 bytes, checksum: 1ddd953840abbbd5d56675c8d6c4fa6e (MD5)Made available in DSpace on 2019-07-15T18:39:31Z (GMT). No. of bitstreams: 1 Farias, L.P. Schistosoma mansoni venom...2019.pdf: 1118803 bytes, checksum: 1ddd953840abbbd5d56675c8d6c4fa6e (MD5) Previous issue date: 2019Welcome Trust (UK) (WT084273/Z/07/Z) to KFH, Fundação Butantan, Fundação de Amparo à Pesquisa do Estado de São Paulo (Brazil) to LPF and LLC (2012/23124-4), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) to LCCL and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001, and by fellowships from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, Brazil) to LPF (2008/57946-5) and HKF (2007/07685-8) and from CNPq to MIK (160861/2017-9). We thank Dra. Eliana Nakano and Ms. Patricia A. Miyasato for supplying the parasite stages and to Alexsander Seixas de Souza for confocal microscopy (FAPESP 00/11624-5) imaging support, all from Instituto Butantan, Brazil.Instituto Butantan. Centro de Biotecnologia. São Paulo, SP, Brasil / Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.Aberystwyth University. Institute of Biological. Environmental and Rural Sciences. Aberystwyth, UK.Aberystwyth University. Institute of Biological. Environmental and Rural Sciences. Aberystwyth, UK.Instituto Butantan. Centro de Biotecnologia. São Paulo, SP, Brasil.Aberystwyth University. Institute of Biological. Environmental and Rural Sciences. Aberystwyth, UK.Aberystwyth University. Institute of Biological. Environmental and Rural Sciences. Aberystwyth, UK.Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.Instituto Butantan. Centro de Biotecnologia. São Paulo, SP, Brasil / Universidade de São Paulo. Pós-Graduação Interunidades em Biotecnologia. São Paulo, SP, Brasil.Leiden University Medical Centre. Center for Proteomics and Metabolomics. RC Leiden, The Netherlands.Leiden University Medical Centre. Department of Parasitology. RC Leiden, The Netherlands.Instituto Butantan. Centro de Biotecnologia. São Paulo, SP, Brasil.Aberystwyth University. Institute of Biological. Environmental and Rural Sciences. Aberystwyth, UK.Schistosoma mansoni venom allergen-like proteins (SmVALs) are part of a diverse protein superfamily partitioned into two groups (group 1 and group 2). Phylogenetic analyses of group 1 SmVALs revealed that members could be segregated into subclades (A-D); these subclades share similar gene expression patterns across the parasite lifecycle and immunological cross-reactivity. Furthermore, whole-mount in situ hybridization demonstrated that the phylogenetically, transcriptionally and immunologically-related SmVAL4, 10, 18 and 19 (subclade C) were all localized to the pre-acetabular glands of immature cercariae. Our results suggest that SmVAL group 1 phylogenetic relationships, stage-specific transcriptional profiles and tissue localization are predictive of immunological cross-reactivity

    In situ Immune Signatures and Microbial Load at the Nasopharyngeal Interface in Children With Acute Respiratory Infection

    Get PDF
    Acute respiratory infection (ARI) is the most frequent cause for hospitalization in infants and young children. Using multiplexed nCounter technology to digitally quantify 600 human mRNAs in parallel with 14 virus- and 5 bacterium-specific RNAs, we characterized viral and bacterial presence in nasopharyngeal aspirates (NPA) of 58 children with ARI and determined the corresponding in situ immune profiles. NPA contained different groups of organisms and these were classified into bacterial (n = 27), viral (n = 5), codetection [containing both viral and bacterial transcripts (n = 21), or indeterminate intermediate where microbial load is below threshold (n = 5)]. We then identified differentially expressed immune transcripts (DEITs) comparing NPAs from symptomatic children vs. healthy controls, and comparing children presenting NPAs with detectable microbial load vs. indeterminate. We observed a strong innate immune response in NPAs, due to the presence of evolutionarily conserved type I Interferon (IFN)-stimulated genes (ISG), which was correlated with total bacterial and/or viral load. In comparison with indeterminate NPAs, adaptive immunity transcripts discriminated among viral, bacterial, and codetected microbial profiles. In viral NPAs, B cell transcripts were significantly enriched among DEITs, while only type III IFN was correlated with viral load. In bacterial NPAs, myeloid cells and coinhibitory transcripts were enriched and significantly correlated with bacterial load. In conclusion, digital nCounter transcriptomics provide a microbial and immunological in situ “snapshot” of the nasopharyngeal interface in children with ARI. This enabled discrimination among viral, bacterial, codetection, and indeterminate transcripts in the samples using non-invasive sampling
    corecore