Repository logo

Browsing by Issue Date, starting with "2023-08-22"

Filter results by year or month
Now showing 1 - 2 of 2
  • The relationship between contextual factors and the mobility ability
    Publication . Fontes, Ana Paula
    Objective: To examine how the relationship between Mobility limitation is influenced by Contextual Factors in community-dwelling older adults. Design: This is a cross-sectional study. Participants: A total of 769 persons aged 65 years or above living in the community-dwelling of the Algarve region. Methods: We study eighteen categories of Personal and Environmental Factors agreement of the International Classification of Functioning (ICF) and their relationship with six categories of the Mobility domain. Multiple logistic regression was used in analyzing functional outcomes in the Mobility. Main Results: The proportion of older adults reporting disability in Mobility activities ranged from 17.4% (Moving Around Within the Home) and 53.2% (Using Private or Public Motorized Transportation). The Contextual Factors with a greater impact in explaining the limitations in Mobility outcomes were Assistance Activities of Daily Living (OR = 3.0 to OR = 11.9), Job Without Qualification (OR = 2.5 to OR = 6.3), Inadequate Nr of Meals (OR = 2.6 to OR = 3.8) and Self-Rated Physical Health (OR = 2.1 to OR = 3.1). The variable sex contributed to explaining the results of the most difficult activities to perform as Moving Around Outside the Home, Climbing and Use of Transports. The contribution of age was observed only in the Use of Transports. Conclusions: Contextual Factors are important predictors of Mobility functioning, namely, those related to Behaviors and Health Events but also those related to Social and Cultural variables.
    2023-08-22Journal article Open Access Show more
  • Pontastacus leptodactylus (Eschscholtz, 1823) and Faxonius limosus (Rafinesque, 1817) as new, alternative sources of chitin and chitosan
    Publication . Nuc, Zofia; Brusotti, Gloria; Catenacci, Laura; Grenha, Ana; Pontes, Jorge Filipe; Pinto-da-Silva, Joana; Rosa Da Costa, Ana; Moro, Paola; Milanese, Chiara; Grisoli, Pietro; Sorrenti, Milena; Dobrzycka-Krahel, Aldona; Bonferoni, Maria Cristina; Caramella, Carla Marcella
    The growing demand for chitin and chitosan makes it necessary to look for new sources of these polymers and to develop more environmentally friendly methods for their isolation. The subjects of the current study were chitin and chitosan extracted from shells of two crayfish species: P. leptodactylus and F. limosus. The obtained polymers were characterized by physicochemical properties (molecular weight, thermal stability, and structure). The obtained chitosan was evaluated regarding biocompatibility and antimicrobial activity. The yield of chitin obtained from P. leptodactylus and F. limosus with a standard method was 22 ± 2.7% and 20 ± 3.6% (w/w), respectively (a preliminary extraction with a natural deep eutectic solvent was performed successfully only for P. leptodactylus). The yield of chitosan production was 15 ± 0.3% and 14 ± 4.2%, respectively. Both chitosan samples showed antimicrobial activity against E. coli and S. aureus. Cytotoxicity assays revealed a time- and concentration-dependent effect, with a milder impact at concentrations up to 250 µg/mL. A more favourable profile was observed for chitosan from F. limosus shells.
    2023-08-22Journal article Open Access Show more