| 1. |
- Wickman, M, et al.
(författare)
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Reduced mite allergen levels in dwellings with mechanical exhaust and supply ventilation.
- 1994
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Ingår i: Clinical and Experimental Allergy. - : Blackwell Publishing. - 0954-7894 .- 1365-2222. ; 24:2, s. 109-114
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Tidskriftsartikel (refereegranskat)abstract
- Seventy similar bungalows constructed between 1968 and 1970 in the same suburban area of Stockholm were investigated regarding the content of house dust mite allergen, absolute indoor humidity, type of ventilation and basement construction. Houses with mechanical exhaust and supply ventilation had an indoor humidity above 7 g/kg less often than houses without this type of ventilation (Odds ratio 0.1, 95% confidence interval 0.0-0.2). Furthermore, only five of the 24 houses with exhaust and supply ventilation contained mattress dust mite allergen concentrations exceeding the median value (98.5 ng/g) compared with 30 of 46 hours which did not have such ventilation (odds ratio = 0.1, C.I. 0.0-0.5). Houses with both natural ventilation and crawl space basement harboured significantly less mattress mite allergen than houses having the same type of ventilation, but with a concrete slab basement. In a cold temperature climate, type of building construction and ventilation seem to be important for the occurrence of house dust mite allergens in dwellings. Our results indicate that modern energy-efficient houses should be equipped with mechanical exhaust and supply ventilation to reduce indoor air humidity during the dry winter months and the risk of mite infestation.
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| 2. |
- Wickman, M, et al.
(författare)
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The effect of alkyd resin composition on the adsorption on calcium carbonate
- 1994
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Ingår i: Nordic Pulp & Paper Research Journal. - 0283-2631 .- 2000-0669. ; 9, s. 94-100
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Tidskriftsartikel (refereegranskat)abstract
- In this paper we present adsorption studies of alkyd resins, frequently used in printing inks, on different calcium carbonate surfaces. The adsorption isotherms indicate that the interactions between alkyd resins and precipitated calcium carbonate are strong. Studies of alkyd resins of different composition clearly show the impact of molecular weight as well as oil length on the adsorption strength. The explanations for this are discussed in terms of compatibility with the solvent used in the study and in terms of alkyd resin molecular weight distribution. Finally, we show that adding a dispersant to the calcium carbonate alters the surface properties and that this affects the adsorption of alkyd resins negatively.
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