283 research outputs found

    U.S. EPA’s Toxicity Reference Database: Martin and Dix Respond

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    Profiling Chemicals Based on Chronic Toxicity Results from the U.S. EPA ToxRef Database

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    Attribute filters allow enhancement and extraction of features without distorting their borders, and never introduce new image features. These are highly desirable properties in biomedical imaging, where accurate shape analysis is paramount. However, setting the attribute-threshold parameters has to date only been done manually. This paper explores simple, fast and automated methods of computing attribute threshold parameters based on image segmentation, thresholding and data clustering techniques. Though several techniques perform well on blood-vessel filtering, the choice of technique appears to depend on the imaging mode.

    Multiple strain-induced phase transitions in LaNiO3 thin films

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    Weber, M.C. et al.Strain effects on epitaxial thin films of LaNiO3 grown on different single crystalline substrates are studied by Raman scattering and first-principles simulation. New Raman modes, not present in bulk or fully-relaxed films, appear under both compressive and tensile strains, indicating symmetry reductions. Interestingly, the Raman spectra and the underlying crystal symmetry for tensile and compressively strained films are different. Extensive mapping of LaNiO3 phase stability is addressed by simulations, showing that a variety of crystalline phases are indeed stabilized under strain which may impact the electronic orbital hierarchy. The calculated Raman frequencies reproduce the principal features of the experimental spectra, supporting the validity of the multiple strain-driven structural transitions predicted by the simulations.J.K., M.W., M.G., and J.I. acknowledge support from the National Research Fund, Luxembourg through a Pearl grant (Grant No. FNR/P12/4853155). ICMAB-CSIC authors acknowledge financial support from the Spanish Ministry of Economy and Competitiveness, through the “Severo Ochoa” Programme for Centres of Excellence in R&D (SEV-2015- 0496) and the MAT2014-56063-C2-1-R and MAT2013- 40581-P projects, and from Generalitat de Catalunya (2014 SGR 734). UB authors acknowledge financial support from the Spanish Ministry of Economy and Competitiveness, project MAT2013-41506-P and from Generalitat de Catalunya (2014 SGR 672).Peer reviewe

    Informing Selection of Nanomaterial Concentrations for ToxCast in Vitro Testing Based on Occupational Exposure Potential

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    Background: Little justification is generally provided for selection of in vitro assay testing concentrations for engineered nanomaterials (ENMs). Selection of concentration levels for hazard evaluation based on real-world exposure scenarios is desirable

    Environmental Impact on Vascular Development Predicted by High-Throughput Screening

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    Background: Understanding health risks to embryonic development from exposure to environmental chemicals is a significant challenge given the diverse chemical landscape and paucity of data for most of these compounds. High-throughput screening (HTS) in the U.S. Environmental Protection Agency (EPA) ToxCast™ project provides vast data on an expanding chemical library currently consisting of > 1,000 unique compounds across > 500 in vitro assays in phase I (complete) and Phase II (under way). This public data set can be used to evaluate concentration-dependent effects on many diverse biological targets and build predictive models of prototypical toxicity pathways that can aid decision making for assessments of human developmental health and disease

    The Vehicle, 1965, Vol. 7

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    Vol. 7 Table of Contents CommentaryElaine Lancepage 3 Lost Island and The Unseen SeaDaun Alan Leggpage 5 ElegyWilliam Mosierpage 6 AwayDavid Dixpage 7 DulceyRoberta Mathewspage 8 Alarum Tuam JonneDavid Walkerpage 11 Little BrotherSteve Gibbspage 13 River RunningDaun Alan Leggpage 15 PortraitRobert D. Thomaspage 16 The RockRoger Lewis Hudsonpage 17 Jarman HospitalElaine Lancepage 18 Of Domes and DiamondsDwight Ashbypage 19 Friday NightRoger J. Barrypage 20 MurderHelen Coxpage 23 Vigil SongDaun Alan Leggpage 24 Had You But Been the OneDavid Helmpage 25 To A Useless WeaponDarlene Brewerpage 25 Out of the NightPat Hartpage 26 La MortAdrian Beardpage 28 Mrs. Milton\u27s LamentBob Millerpage 30 Cockle CoveSusan McCabepage 31 Loss of VirtueJim Rinnertpage 32 The KeepsakeDwight Ashbypage 33 The RuinsRoger Lewis Hudsonpage 35 Ante Major OdysseyDaun Alan Leggpage 38 ReligionAnthony Barrettepage 39 All JoyJim Rinnertpage 40 SesameElaine Lancepage 40 CenterpieceDwight Ashbypage 41 A Great White WaveJohn Rhodespage 42 QueryElaine Lancepage 44 PistachioRita Salyerspage 45 FacadeKathleen McCormackpage 46 Winter Wisp AwaySteve Gibbspage 46 ScenarioDavid Dixpage 47 Damn-GodSteve Gibbspage 48 AccidentElaine Lancepage 48https://thekeep.eiu.edu/vehicle/1013/thumbnail.jp
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