| 1. |
- Askanius, Tina, et al.
(författare)
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Video for change
- 2014
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Ingår i: The Handbook of Development Communication and Social Change. - 9781118505311 ; , s. 453-470
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Bokkapitel (refereegranskat)
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| 2. |
- Aulenbach, Donald B., et al.
(författare)
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Removal of heavy metals in potw using alum or sodium aluminate for phosphorus removal
- 1984
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Ingår i: Proceedings of Mid-Atlantic Industrial Waste Conference. ; , s. 318-330
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Konferensbidrag (refereegranskat)abstract
- The addition of alum or sodium aluminate at dosages which effectively remove phosphorus is beneficial in removing copper, chromium, and lead when present in wastewaters. Chromium removal is enhanced by sodium aluminate addition, but alum does not affect chromium removal. Both types of aluminum salts appear to increase the removal of lead, but the large variance in the data does not allow this to be confirmed by the t-tests. Of the remaining metals analyzed, no difference in removal was observed with and without aluminum salt addition for cadmium or antimony, nor was there any difference in TOC removal. Mercury was effectively removed to below the detection limit by primary sedimentation, so no further removal was achieved during secondary treatment when the alum/aluminate was added. Other metals were not present in amounts above detection limits.
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| 3. |
- Aulin, Christian, 1980-, et al.
(författare)
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Buildup of polyelectrolyte multilayers of polyethyleneimine and microfibrillated cellulose studied by in situ dual-polarization interferometry and quartz crystal microbalance with dissipation
- 2008
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Ingår i: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 24:6, s. 2509-2518
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Tidskriftsartikel (refereegranskat)abstract
- Polyethyleneimine (PEI) and Microfibrillated cellulose (MFC) have been used to buildup polyelectrolyte multilayers (PEM) on silicone oxide and silicone oxynitride surfaces at different pH values and with different electrolyte and polyelectrolyte/colloid concentrations of the components. Consecutive adsorption on these surfaces was studied by in situ dual-polarization interferometry (DPI) and quartz crystal microbalance measurements. The adsorption data obtained from both the techniques showed a steady buildup of multilayers. High pH and electrolyte concentration of the PEI solution was found to be beneficial for achieving a high adsorbed amount of PEI, and hence of MFC, during the buildup of the multilayer. On the other hand, an increase in the electrolyte concentration of the MFC dispersion was found to inhibit the adsorption of MFC onto PEL The adsorbed amount of MFC was independent of the bulk MFC concentration in the investigated concentration range (15-250 mg/L). Atomic force microscopy measurements were used to image a MFC-treated silicone oxynitride chip from DPI measurements. The surface was found to be almost fully covered by randomly oriented microfibrils after the adsorption of only one bilayer of PEI/MFC. The surface roughness expressed as the rms-roughness over 1 ÎŒm2 was calculated to be 4.6 nm (1 bilayer). The adsorbed amount of PEI and MFC and the amount of water entrapped by the individual layers in the multilayer structures were estimated by combining results from the two analytical techniques using the de Feijter formula. These results indicate a total water content of ca. 41% in the PEM.
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| 4. |
- Aulin, Cecilia, et al.
(författare)
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Cell produced ECM on engineered polymer structures
- 2006
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Ingår i: Tissue Engineering and Regenerative Medicine International Society Conference, Rotterdam, 08 – 11 oktober 2006, oral presentation.
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Konferensbidrag (populärvet., debatt m.m.)
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| 5. |
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| 7. |
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| 8. |
- Hedenmalm, Håkan, et al.
(författare)
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Hele-Shaw on weakly hyperbolic surfaces
- 2005
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Ingår i: Indiana University Mathematics Journal. - : Indiana University Mathematics Journal. - 0022-2518 .- 1943-5258. ; 54:4, s. 1161-1180
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Tidskriftsartikel (refereegranskat)abstract
- We consider the Hele-Shaw flow that arises from injection of two-dimensional fluid into a point of a curved surface. The resulting fluid domains are more or less determined implicitly by a mean value property for harmonic functions. We improve on the results of Hedenmalm and Shimorin [8] and obtain essentially the same conclusions while imposing a weaker curvature condition on the surface. Incidentally, the curvature condition is the same as the one that appears in Hedenmalm and Perdomo's paper [7], where the problem of finding smooth area minimizing surfaces for a given curvature form under a natural normalizing condition was considered. Probably there are deep reasons behind this coincidence.
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