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- Cernencu, Alexandra, et al.
(författare)
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Bioinspired 3D printable pectin-nanocellulose ink formulations
- 2019
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Ingår i: Carbohydrate Polymers. - : Elsevier Ltd. - 0144-8617 .- 1879-1344. ; 220, s. 12-21
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Tidskriftsartikel (refereegranskat)abstract
- The assessment of several ink formulations for 3D printing based on two natural macromolecular compounds is presented. In the current research we have exploited the fast crosslinking potential of pectin and the remarkable shear-thinning properties of carboxylated cellulose nanofibrils, which is known to induce a desired viscoelastic behavior. Prior to 3D printing, the viscoelastic properties of the polysaccharide inks were evaluated by rheological measurements and injectability tests. The reliance of the printing parameters on the ink composition was established through one-dimensional lines printing, the base units of 3D-structures. The performance of the 3D-printed structures after ionic cross-linking was evaluated in terms of mechanical properties and rehydration behavior. MicroCT was also used to evaluate the morphology of the 3D-printed objects regarding the effect of pectin/nanocellulose ratio on the geometrical features of scaffolds. The proportionality between the two polymers proved to be the determining factor for the firmness and strength of the printed objects. © 2019
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| 3. |
- Dahlseng, Magnus O, et al.
(författare)
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Gastrostomy tube feeding of children with cerebral palsy: variation across six European countries.
- 2012
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Ingår i: Developmental Medicine and Child Neurology. - : Wiley. - 0012-1622. ; 54:10, s. 938-944
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Tidskriftsartikel (refereegranskat)abstract
- Aim To compare the prevalence of gastrostomy tube feeding (GTF) of children with cerebral palsy (CP) in six European countries. Method Data on 1295 children (754 males, 541 females; mean age 5y 11mo, range 11y 2mo, min 6mo, max 11y 8mo) with CP born from 1999 to 2001 were collected from geographically defined areas in six European countries; four of the areas covered the whole country. Distribution of CP was unilateral 37%, bilateral 51%, dyskinetic 8%, and ataxic 4%. Sixty children were classified in Gross Motor Function Classification System (GMFCS) levels I and II, 6 in level III and 34 in levels IV and Vas Outcome measures were GTF, age at placement, feeding difficulties and the children's height and weight for age standard deviation scores (z-scores). Results The use of GTF among all children with CP was highest in western Sweden (22%, 95% confidence interval [CI] 16-29), and lowest in Portugal (6%, 95% CI 3-10), northern England (6%, 95% CI 3-9) and in Iceland (3%, 95% CI 0-13; p<0.001). The difference between areas was greater among children in GMFCS levels IV and V (non-ambulant); in this group, lower height z-scores were more prevalent in the areas with lower prevalence of GTF. The children's age at placement of gastrostomy also varied between areas (p<0.002). Interpretation The observed differences in the use of GTF may reflect differences in access to treatment or clinical practice, or both. Our results suggest that the use of GTF may improve growth in height and weight among children with more severely affected gross motor function - the group most likely to have associated feeding difficulties.
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