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1.
Int J Biol Macromol ; 273(Pt 2): 132878, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38844277

RESUMO

Granular hydrogels have emerged as a new class of materials for 3D printing, tissue engineering, and food applications due to their extrudability, porosity, and modularity. This work introduces a convenient method to prepare granular hydrogel with tunable properties by modulating the interaction between gum Arabic (GA) and whey protein isolate (WPI) microgels. As the concentration of GA increased, the appearance of the hydrogel changed from fluid liquid to moldable solid, and the microstructure changed from a macro-porous structure with thin walls to a dense structure formed by the accumulation of spherical particles. At a GA concentration of 0.5 %, the hydrogels remained fluid. Granular hydrogels containing 1.0 % GA showed mechanical properties similar to those of tofu (compressive strength: 10.8 ± 0.5 kPa, Young's modulus: 16.7 ± 0.4 kPa), while granular hydrogels containing 1.5 % GA showed mechanical properties similar to those of hawthorn sticks and sausages (compressive strength: 300.4 ± 5.8 kPa; Young's modulus: 200.5 ± 3.4 kPa). The hydrogel with 2.0 % GA was similar to hawthorn sticks, with satisfactory bite resistance and elasticity. Such tunability has led to various application potentials in the food industry to meet consumer demand for healthy, nutritious, and diverse textures.


Assuntos
Goma Arábica , Hidrogéis , Microgéis , Proteínas do Soro do Leite , Goma Arábica/química , Hidrogéis/química , Proteínas do Soro do Leite/química , Microgéis/química , Módulo de Elasticidade , Reologia , Porosidade , Força Compressiva
2.
Clin Gerontol ; 39(5): 428-448, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-29471771

RESUMO

OBJECTIVES: To evaluate a 6-week self-management program on pain conducted in a mobile setting at the residences of older adult participants. METHODS: In this single-blinded randomized controlled trial, 46 community-dwelling older adults with chronic knee pain were randomly assigned to the experimental (n = 19) and wait-list control groups (n = 27). The experimental group engaged in the 6-week program while the control group was only given some pamphlets on exercise and joint care. The pain level, physical functions, QOL, and self-efficacy of the participants in both groups were assessed at baseline, post-program, and at the 1-month follow-up session. Both baseline and post-program (or post-control-period assessment) data were analyzed. RESULTS: The results showed that the participants in the experimental group had a higher level of self-efficacy, better performance in walking test, a higher level of quality-of-life, and less frequency of pain at the post-program follow-up as compared to the control group. The effect was maintained among the experimental group at post-4-week follow-up and further reduction in pain was detected. CONCLUSIONS: The program appeared to be effective at improving the pain status, self-efficacy, functional performance, and quality-of-life of older adults. However, as the sample size was small, further study is suggested to investigate the effects of the program.


Assuntos
Vida Independente/psicologia , Dor/reabilitação , Qualidade de Vida/psicologia , Autogestão/psicologia , Atividades Cotidianas , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Articulação do Joelho/patologia , Masculino , Pessoa de Meia-Idade , Avaliação de Resultados em Cuidados de Saúde , Dor/psicologia , Manejo da Dor/métodos , Aptidão Física/fisiologia , Autoeficácia , Teste de Caminhada
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