3,119 research outputs found

    The biological activity of 25-hydroxycholecalciferol, a metabolite of vitamin D3.

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    The avian vitamin D receptors: primary structures and their origins.

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    The temporal dynamics of visual processing in multiple sclerosis

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    Although the integrity of the visual system is often affected in multiple sclerosis (MS), the potential relationship between the temporal dynamics of visual processing and performance on neuropsychological tests assessing processing speed (PS) remains relatively unexplored. Here, we test if a PS deficit is related to abnormalities within the visual system, rather than impaired higher-level cognitive function. Two groups of participants with MS (1 group with PS deficits and another without) and a healthy control group, matched for age and education, were included. To explore the temporal dynamics of visual processing, we used 2 psychophysical paradigms: attention enhancement/prioritization and rapid serial visual presentation. Visual PS deficits were associated with a decreased capability to detect visual stimuli and a higher limitation in visual temporal-processing capacity. These results suggest that a latent sensorial temporal limitation of the visual system is significantly associated to PS deficits in MS.This work was supported by the Foundation for Science and Technology of Portugal with a doctoral fellowship grant (No. SFRH/BD/455591/2008) to SLC. JA is supported by funding from the Foundation for Science and Technology of Portugal Project Grants PTDC/PSI-PCO/114822/2009 and PTDC/MHC-PCN/3575/2012.info:eu-repo/semantics/publishedVersio

    Analysis of travelling waves associated with the modelling of aerosolised skin grafts

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    A previous model developed by the authors investigates the growth patterns of keratinocyte cell colonies after they have been applied to a burn site using a spray technique. In this paper, we investigate a simplified one-dimensional version of the model. This model yields travelling wave solutions and we analyse the behaviour of the travelling waves. Approximations for the rate of healing and maximum values for both the active healing and the healed cell densities are obtained

    Contemplative Science: An Insider's Prospectus

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    This chapter describes the potential far‐reaching consequences of contemplative higher education for the fields of science and medicine
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