Supra-aggregates |
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| Institution: | 1. Laboratoire S.R.S.I., U.R.A. C.N.R.S. 1662, Université P. et M. Curie (Paris VI), B.P. 52, 4 Place Jussieu, F-752 31 Paris Cedex 05, France;2. Department of Applied Mathematics P.O. Box 4 ACT Canberra 0200, Australia;3. Department of Physical Chemistry 1, P.O. Box 124, University of Lund, Lund SE 22100, Sweden;1. Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands;2. The George Institute for Global Health, Sydney, NSW, Australia;3. School of Cardiovascular and Metabolic Health, University of Glasgow, Glasgow, UK;4. Eli Lilly and Company, Indianapolis, IN, USA;5. Providence Health Care, University of Washington, Spokane, WA, USA;6. Division of Nephrology, Department of Medicine, Toronto General Hospital, University Health Network, University of Toronto, Toronto, ON, Canada;1. Centre for Development and Environment, University of Bern, Switzerland;2. Department of Environmental Systems Science (D-USYS), ETH Zurich, Switzerland;3. Leuphana University, Lüneburg, Germany;4. Department of Geography and Environmental Studies, University of Nairobi, Kenya;5. International Center for Tropical Agriculture (CIAT), Rwanda;6. Institute of Social and Preventive Medicine (ISPM), University of Bern, Switzerland;7. CABI, Delémont, Switzerland;8. Agroscope, Zurich, Switzerland;9. Institut de l''Environnement et de Recherches Agricoles (INERA), Ouagadougou, Burkina Faso;10. Group of Plant Nutrition, Institute of Agricultural Sciences, D-USYS, ETH Zurich, Switzerland;11. Transdisciplinarity Laboratory (TdLab), Institute for Environmental Decisions, D-USYS, ETH Zurich, Switzerland;1. Diabetes Center, Department of Endocrinology and Metabolism, 1st Department of Internal Medicine, AHEPA University Hospital, Thessaloniki, Greece;2. Department of Nursing, Alexander Technological Educational Institute of Thessaloniki, Thessaloniki, Greece;1. Institut national de la santé et de la recherche médicale Unit 1018, Team 5, Centre de recherche en épidémiologie et santé des populations, Hôpital Paul Brousse, Paris-Sud University and Versailles Saint-Quentin-en-Yvelines University (Paris-Ile-de-France-Ouest University), Villejuif, France;2. Department of Nephrology, Ambroise Paré University Hospital, Assistance publique – Hôpitaux de Paris, Boulogne-Billancourt/Paris, France |
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| Abstract: | Mixtures of oil (isooctane), water, and a double-chained ionic surfactant, Cu(AOT)2, copper(II) bis(2-ethylhexyl)sulfosuccinate] form equilibrium phases consisting of spontaneous emulsions thermodynamically stable systems. The experimental conditions are such that the head polar group of the surfactant is totally hydrated. The emulsion droplets are comprised of supra aggregates, lamellar spherulites in which interior and exterior are bicontinuous microemulsions. The microstructures and component ratios can be predicted from elementary considerations that require only the notion of local and global packing constraints. The phenomenon of supra aggregation, microphases within any topologically closed container, in equilibrium with an external phase, appears quite general. The results throw some light on the meaning of ‘phase’ in mesostructured fluids. |
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