Plant polysaccharides have been increasingly employed in the pharmaceutical, industrial, and food environments due to their versatile functional properties. In the present investigation, a heteropolysaccharide galactomannan (GAP) was extracted from Adenanthera pavonina L. seeds and characterized by physicochemical analyses to determine its thermal properties, photostability, antioxidant activity, and acute toxicity. GAP was characterized by FTIR, DSC, and TG. The photostability of GAP submitted to artificial UV irradiation was analyzed. Antioxidant activity was evaluated by the DPPH (2,2-diphenyl-1-1-picrylhydrazyl) free radical-scavenging method, while a bioassay method was carried out to study acute toxicity in Artemia salina L. Physical-chemical and functional characteristics of GAP support its potential role in the food and pharmaceutical industries. GAP was photostable under UV irradiation. In vitro GAP antioxidant evaluation showed that it bears free radicalscavenging activity for DPPH radicals. The median lethal concentration (LC 50 ) of GAP was 239.4 mg•mL −1 , indicating that this biopolymer is nontoxic. Such results indicate that this biopolymer presents characteristics of neutrality, photostability, and nontoxicity that are commercially attractive.
Galactomannans are versatile macromolecules with broad industrial potential. The influence of changes in the chemical structures and respective bioactivities of these polysaccharides have been extensively studied. The derivatives obtained by sulfation, complexation, and phosphorylation are the most studied biological properties in galactomannans. The derivatives obtained have shown several pharmacological activities such as antiviral, antimicrobial, anticoagulant, fibrinolytic, chemopreventive, anticancer, antioxidant, chondroprotective, analgesic, immunomodulatory, and antileishmanial. Considering the relevance of these studies, we aim to provide an overview of studies that apply galactomannan modification or derivatization strategies to improve their properties for applications in the biomedical area. We identified the success of most modified galactomannans for pharmacological purposes. However, some studies found loss of bioactivity of the original polysaccharide after chemical changes to its original structures.
The present work aimed to characterize the exopolysaccharide obtained from water kefir grains (EPSwk), a symbiotic association of probiotic microorganisms. New findings of the technological, mechanical, and biological properties of the sample were studied. The EPSwk polymer presented an Mw of 6.35 × 105 Da. The biopolymer also showed microcrystalline structure and characteristic thermal stability with maximum thermal degradation at 250 °C. The analysis of the monosaccharides of the EPSwk by gas chromatography demonstrated that the material is composed of glucose units (98 mol%). Additionally, EPSwk exhibited excellent emulsifying properties, film-forming ability, a low photodegradation rate (3.8%), and good mucoadhesive properties (adhesion Fmax of 1.065 N). EPSwk presented cytocompatibility and antibacterial activity against Escherichia coli and Staphylococcus aureus. The results of this study expand the potential application of the exopolysaccharide from water kefir as a potential clean-label raw material for pharmaceutical, biomedical, and cosmetic applications.
Biopolymers are widely distributed in nature and have a wide variety of biological properties and applications. Chia (Salvia hispanica L.) is an herbaceous plant that belongs to the Lamiaceae family, which when in contact with water exude the fraction of soluble fiber in the form of mucilage. In view of the above, this study aims to provide an overview of the characteristics and applications of chia mucilage that make it a biopolymer of industrial interest. The data collection was carried out in the databases: SciELO (Scientific Electronic Library Online), Science Direct, MDPI, Wiley Online Library, Springer and Periodical capes using the following descriptors: “Chia Seed Mucilage”, “Technological Properties”, “Biological Activities”, and “Applications” in alone and in association. After the critical analysis of the selected articles, it was possible to conclude that the chia mucilage has numerous and unique physical-chemical, chemical and technological properties. Applications in the food field are among the most used in view of the industrial perspective. However, the infinite potential that this biomaterial has for the pharmaceutical and agricultural industries is undeniable.
Introdução: a territorialização trata-se de uma técnica de planejamento e gestão dos serviços de saúde, de forma a propor intervenções a partir da realidade local. O objetivo deste trabalho é relatar a experiência de territorialização, realizada por residentes, em um dos territórios de saúde de uma cidade no norte do Piauí. Metodologia: trata-se de um relato de experiência vinculado à atuação de quatro residentes em Atenção Básica, no processo de territorialização na zona urbana de um território de uma Unidade Básica de Saúde em uma cidade no norte do Piauí, correspondente aos meses de março à agosto de 2022. Resultado e Discussão: após a inserção dos residentes na comunidade, territorializar, observar as demandas mais prevalentes da população adscrita, e articular com todos os envolvidos nos processos de trabalho, foram planejadas intervenções pertinentes e aplicáveis à realidade estudada. As intervenções fruto da experiência de territorialização necessitam ser discutidas entre equipe multiprofissional em consideração às demandas vigentes no território. Conclusão: relatar essa experiência na Atenção Básica sugere o interesse que outros profissionais de saúde acessem uma realidade em saúde viva, que o cotidiano de vida e a ciência se encontrem, e a partir disso a saúde seja garantida, enquanto em outras realidades esta experiência possa contribuir no trabalho em saúde.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.