منابع مشابه
Stem cells supporting other stem cells
Adult stem cell therapies are increasingly prevalent for the treatment of damaged or diseased tissues, but most of the improvements observed to date are attributed to the ability of stem cells to produce paracrine factors that have a trophic effect on existing tissue cells, improving their functional capacity. It is now clear that this ability to produce trophic factors is a normal and necessar...
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BACKGROUND The gastric pathogen Helicobacter pylori relies on nickel-containing urease and hydrogenase enzymes in order to colonize the host. Incorporation of Ni(2+) into urease is essential for the function of the enzyme and requires the action of several accessory proteins, including the hydrogenase accessory proteins HypA and HypB and the urease accessory proteins UreE, UreF, UreG and UreH. ...
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Although natural language is ambiguous, various linguistic and extra-linguistic factors often help determine a preferred reading. In this paper , we show that model generation can be used to model this process in the case of reciprocal statements. The proposed analysis builds on insights from Dalrymple et al. 98 and is shown to provide an integrated, computational account of the interplay betwe...
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We approach the problem of adaptively combining the predictions of an ensemble of seasonal climate models as a Multi-task Learning (MTL) problem. Unlike the traditional MTL setting, we only have a single functional task (combining the predictions ensemble members), where we consider multiple forecast periods from the same suite of models as our multiple learning tasks. Even though the same mode...
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It is has been well known since Fiengo and Lasnik (1973) and Langendoen (1978) that each other presents a high degree of contextual variability. In a tradition that goes back to Langendoen (1978) and later to Dalrymple et al. (1998), theoreticians have tried to list different truth conditions and to establish a criterion for determining which one holds in which particular context. Along the lin...
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ژورنال
عنوان ژورنال: Cell Stem Cell
سال: 2008
ISSN: 1934-5909
DOI: 10.1016/j.stem.2007.12.008