1,089 research outputs found

    The European VCD System: Facilitating Public Procurement through Criteria-to-Evidence Mapping

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    Epithelioid Glioblastoma Presenting as Aphasia in a Young Adult with Ovarian Cancer: A Case Report

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    Our patient\u27s clinical history and preoperative radiographic evaluation suggested central nervous system (CNS) metastatic disease. Ultimately, final pathology revealed epithelioid glioblastoma (eGBM), a newly classified CNS primary tumor. This reinforces the importance of direct tissue sampling and including eGBM on the differential for young patients with histories of systemic cancer presenting with new CNS lesions

    The branch processes of vortex filaments and Hopf Invariant Constraint on Scroll Wave

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    In this paper, by making use of Duan's topological current theory, the evolution of the vortex filaments in excitable media is discussed in detail. The vortex filaments are found generating or annihilating at the limit points and encountering, splitting, or merging at the bifurcation points of a complex function Z(x⃗,t)Z(\vec{x},t). It is also shown that the Hopf invariant of knotted scroll wave filaments is preserved in the branch processes (splitting, merging, or encountering) during the evolution of these knotted scroll wave filaments. Furthermore, it also revealed that the "exclusion principle" in some chemical media is just the special case of the Hopf invariant constraint, and during the branch processes the "exclusion principle" is also protected by topology.Comment: 9 pages, 5 figure

    Evolution of the Chern-Simons Vortices

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    Based on the gauge potential decomposition theory and the Ï•\phi -mapping theory, the topological inner structure of the Chern-Simons-Higgs vortex has been showed in detail. The evolution of CSH vortices is studied from the topological properties of the Higgs scalar field. The vortices are found generating or annihilating at the limit points and encountering, splitting or merging at the bifurcation points of the scalar field Ï•.\phi .Comment: 10 pages, 10 figure

    Condition of career readiness in the United States

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    The 2022 inaugural Condition of Career Readiness in the United States report highlights findings and recommendations to help business and industry, federal and state agencies, elected officials, and national organizations reflect on what investments and resources are needed to support the future economic competitiveness of our nation. This inaugural report describes our states’ progress towards becoming a Career Ready Nation. The report was produced for the Coalition for Career Development Center (CCD Center) by the Boston University Center for Future Readiness with support from American Student Assistance (ASA) and the Collaborative on Academic, Social and Emotional Learning (CASEL).Coalition for Career Development Centerhttps://irp.cdn-website.com/81ac0dbc/files/uploaded/CCDC-Report-nopics-V2.pdfPublished versio

    A homologous production system for Trichoderma reesei secreted proteins in a cellulase-free background

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    Recent demands for the production of biofuels from lignocellulose led to an increased interest in engineered cellulases from Trichoderma reesei or other fungal sources. While the methods to generate such mutant cellulases on DNA level are straightforward, there is often a bottleneck in their production since a correct posttranslational processing of these enzymes is needed to obtain highly active enzymes. Their production and subsequent enzymatic analysis in the homologous host T. reesei is, however, often disturbed by the concomitant production of other endogenous cellulases. As a useful alternative, we tested the production of cellulases in T. reesei in a genetic background where cellulase formation has been impaired by deletion of the major cellulase transcriptional activator gene xyr1. Three cellulase genes (cel7a, cel7b, and cel12a) were expressed under the promoter regions of the two highly expressed genes tef1 (encoding translation elongation factor 1-alpha) or cdna1 (encoding the hypothetical protein Trire2:110879). When cultivated on d-glucose as carbon source, the Δxyr1 strain secreted all three cellulases into the medium. Related to the introduced gene copy number, the cdna1 promoter appeared to be superior to the tef1 promoter. No signs of proteolysis were detected, and the individual cellulases could be assayed over a background essentially free of other cellulases. Hence this system can be used as a vehicle for rapid and high-throughput testing of cellulase muteins in a homologous background
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