Percorrer por autor "Almeida, Catarina Dias de"
A mostrar 1 - 5 de 5
Resultados por página
Opções de ordenação
- Biodegradable polyesters from agro&industrial by-productsPublication . Almeida, Catarina Dias de; Cavalheiro, João; Raposo, Rodrigo; Cesário, Teresa; Ferreira, Frederico; Ferreira, Bruno; van Keulen, Frederik; Pollet, Eric; Fonseca, M. Manuela R. da
- Polyhydroxyalkanoates : medical applications and potential for use in dentistryPublication . Abdeladhim, Rim Ben; Reis, José Alexandre; Vieira, Ana Maria; Almeida, Catarina Dias dePolyhydroxyalkanoates (PHAs) are promising biopolymers as an alternative to traditional synthetic polymers due to their biodegradability and biocompatibility. The PHA market is blooming in response to the growing demand for biodegradable and environmentally friendly plastics. These biopolyesters are produced and degraded by a variety of microorganisms, making them environmentally friendly, while offering benefits such as biocompatibility (when adequately processed) and biodegradability. Their versatility extends to various areas, from biomedicine to agriculture and composite materials, where they pave the way for significative innovations. In the field of regenerative medicine, some PHAs have key applications, namely in vascular grafts, oral tissue regeneration, and development of self-healing polymers. In addition, PHAs have the potential to be used in the creation of dental implant materials and dental medical devices. PHAs can also be used to encapsulate hydrophobic drugs, providing an approach for more targeted and effective treatments. To summarize, PHAs open new perspectives in the field of medicine by improving drug delivery and offering ecologically biocompatible solutions for medical devices. The aim of this review is to present the medical and dental applications of PHA, their advantages, disadvantages, and indications.
- Special Issue “Novel Developments in the Bioproduction of Biochemicals and Biomaterials”Publication . Almeida, Catarina Dias de; Queirós, OdíliaEditorial
- Special issue titled “Advances in biomass-based materials and their applications”Publication . Almeida, Catarina Dias deEditorial
- Xylose metabolism in bacteria : opportunities and challenges towards efficient lignocellulosic biomass-based biorefineriesPublication . Domingues, Rafael; Bondar, Maryna; Palolo, Inês; Queirós, Odília; Almeida, Catarina Dias de; Cesário, M. TeresaIn a sustainable society based on circular economy, the use of waste lignocellulosic biomass (LB) as feedstock for biorefineries is a promising solution, since LB is the world’s most abundant renewable and non-edible raw material. LB is available as a by-product from agricultural and forestry processes, and its main components are cellulose, hemicellulose, and lignin. Following suitable physical, enzymatic, and chemical steps, the different fractions can be processed and/or converted to value-added products such as fuels and biochemicals used in several branches of industry through the implementation of the biorefinery concept. Upon hydrolysis, the carbohydrate-rich fraction may comprise several simple sugars (e.g., glucose, xylose, arabinose, and mannose) that can then be fed to fermentation units. Unlike pentoses, glucose and other hexoses are readily processed by microorganisms. Some wild-type and genetically modified bacteria can metabolize xylose through three different main pathways of metabolism: xylose isomerase pathway, oxidoreductase pathway, and non-phosphorylative pathway (including Weimberg and Dahms pathways). Two of the commercially interesting intermediates of these pathways are xylitol and xylonic acid, which can accumulate in the medium either through manipulation of the culture conditions or through genetic modification of the bacteria. This paper provides a state-of-the art perspective regarding the current knowledge on xylose transport and metabolism in bacteria as well as envisaged strategies to further increase xylose conversion into valuable products.