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Träfflista för sökning "WFRF:(Hilty M) srt2:(2005-2009)"

Sökning: WFRF:(Hilty M) > (2005-2009)

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1.
  • Hilty, F. M., et al. (författare)
  • Development and optimization of iron- and zinc-containing nanostructured powders for nutritional applications
  • 2009
  • Ingår i: Nanotechnology. - : IOP Publishing. - 0957-4484 .- 1361-6528. ; 20:47
  • Tidskriftsartikel (refereegranskat)abstract
    • Reducing the size of low-solubility iron (Fe)-containing compounds to nanoscale has the potential to improve their bioavailability. Because Fe and zinc (Zn) deficiencies often coexist in populations, combined Fe/Zn-containing nanostructured compounds may be useful for nutritional applications. Such compounds are developed here and their solubility in dilute acid, a reliable indicator of iron bioavailability in humans, and sensory qualities in sensitive food matrices are investigated. Phosphates and oxides of Fe and atomically mixed Fe/Zn-containing (primarily ZnFe(2)O(4))nanostructured powders were produced by flame spray pyrolysis (FSP). Chemical composition and surface area were systematically controlled by varying precursor concentration and feed rate during powder synthesis to increase solubility to the level of ferrous sulfate at maximum Fe and Zn content. Solubility of the nanostructured compounds was dependent on their particle size and crystallinity. The new nanostructured powders produced minimal color changes when added to dairy products containing chocolate or fruit compared to the changes produced when ferrous sulfate or ferrous fumarate were added to these foods. Flame-made Fe- and Fe/Zn-containing nanostructured powders have solubilities comparable to ferrous and Zn sulfate but may produce fewer color changes when added to difficult-to-fortify foods. Thus, these powders are promising for food fortification and other nutritional applications.
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4.
  • Wäger, Patrick A., et al. (författare)
  • Experience with a System Dynamics model in a prospective study on the future impact of ICT on environmental sustainability
  • 2006
  • Ingår i: Proceedings of the iEMSs 3rd Biennial Meeting,Summit on Environmental Modelling and Software. - 1424308526 - 9781424308521
  • Konferensbidrag (refereegranskat)abstract
    • To assess the potential impact of ICT on environmental sustainability in the European Union within a time horizon until 2020, we developed a System Dynamics model. In our contribution we make a critical, retrospective evaluation of the model with regard to the requirements and expectations of the project commissioners and of experts involved in the modeling and simulation process. The issues addressed are problem adequacy, validity, transparency, communicability and receptivity of the model. We conclude that modeling approaches that better support a modular model design than System Dynamics does would lead to better results regarding these requirements, and that a modeling language based on a more domain-specific ontology than System Dynamics would be needed to create models that are communicable and have an adequate epistemic connectivity to the scientific and political discourse.
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