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  • Manniche, Jesper, et al. (författare)
  • Destination: A circular tourism economy : a handbook for transitioning toward a circular economy within the tourism and hospitality sectors in the South Baltic Region
  • 2017. - 1
  • Bok (populärvet., debatt m.m.)abstract
    • This handbook provides an overall understanding of the concept of the circular economy and of the societal dynamics through which innovations and transitioning processes towards a circular economy are realised. It describes and discusses the specific economic and political context for applying and developing the circular economy in the CIRTOINNO project. The specific contexts are the tourism sectors in the South Baltic partner regions. It investigates and discusses the opportunities for small and medium-sized tourism businesses to adopt circular economy ideas, and to identify possible ‘good practices’ among tourism SMEs in developing and applying circular economy solutions, especially in relation to the fields of foci of the CIRTOINNO project: accommodation, food and spa services. 
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  • Spektor, Kristina, 1989-, et al. (författare)
  • Ultrahydrous stishovite from high-pressure hydrothermal treatment of SiO2
  • 2011
  • Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 108:52, s. 20918-20922
  • Tidskriftsartikel (refereegranskat)abstract
    • Stishovite (SiO2 with the rutile structure and octahedrally coordinated silicon) is an important high-pressure mineral. It has previously been considered to be essentially anhydrous. In this study, hydrothermal treatment of silica glass and coesite at 350–550 °C near 10 GPa produces stishovite with significant amounts of H2O in its structure. A combination of methodologies (X-ray diffraction, thermal analysis, oxide melt solution calorimetry, secondary ion mass spectrometry, infrared and nuclear magnetic resonance spectroscopy) indicate the presence of 1.3 ± 0.2 wt % H2O and NMR suggests that the primary mechanism for the H2O uptake is a direct hydrogarnet-like substitution of 4H+ for Si4+, with the protons clustered as hydroxyls around a silicon vacancy. This substitution is accompanied by a substantial volume decrease for the system (SiO2 + H2O), although the stishovite expands slightly, and it is only slightly unfavorable in energy. Stishovite could thus be a host for H2O at convergent plate boundaries, and in other relatively cool high-pressure environments.
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