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- Engstrand Unosson, Johanna, et al.
(författare)
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An evaluation of methods to determine the porosity of calcium phosphate cements
- 2015
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Ingår i: Journal of Biomedical Materials Research. Part B - Applied biomaterials. - : Wiley. - 1552-4973 .- 1552-4981. ; 103:1, s. 62-71
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Tidskriftsartikel (refereegranskat)abstract
- The porosity of a material can be determined using a diversity of methods; however, the results from these methods have so far not been compared and analyzed for calcium phosphate cements (CPCs). The aim of this study was to compare a fast and easy method for porosity measurements with some commonly used porosity methods for CPCs. The investigated method is based on the assumption that when a wet cement sample is dried, the volume of the evaporated water is equal to the volume of pores within the cement. Moreover, different methods of drying the cements were evaluated for acidic CPCs. The results showed that drying at room temperature (22°C ±1°C) is preferable, since a phase transformation was observed at higher temperatures. The results also showed that drying for 24 hours in vacuum was sufficient to achieve water free cements. The porosity measured was found to vary between the porosity methods evaluated herein, and to get a complete picture of a cement’s porosity more than one method is recommended. Water evaporation, is, however, a fast and easy method to estimate the porosity of CPCs and could simplify porosity measurements in the future.
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| 2. |
- Westling Allodi, Mara, 1959-, et al.
(författare)
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Play for Children with Disabilities : the Users’ Needs in the Swedish Context
- 2019
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Ingår i: Users' Needs Report on Play for Children with Disabilities. - Warsaw, Poland : De Gruyter Open. - 9783110537451 - 9783110537505 - 9783110537482 ; , s. 104-116
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this study is twofold: firstly the aim is to give a short description of the policy context of Sweden, which is relevant for the topic of “Play for children with disabilities”, through a presentation of the legislation and the policies of stakeholders, the national and local agencies and authorities with responsibilities in this field, and of other non-governmental organizations. Secondly, the aim is to perform a mapping of the users’ needs concerning play for children with disabilities, which are emerging from available research from relevant disciplines, reports and investigations made from the authorities and organizations that have responsibilities in this field, and other relevant stakeholders in Sweden. The content of the mapping effectuated are the users’ needs, the barriers and the facilitators that are described in the identified reports.
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