21 documents found, page 1 of 3
Exploring heat exchange in space: recent advances in two-phase fluid experiment...
Nobrega, Glauco; Afonso, Inês Santos; Cardoso, Beatriz; Souza, Reinaldo Rodrigues de; Moita, Ana; Ribeiro, João EduardoThermal regulation has assumed a central role in space expeditions ever since the inception of Sputnik-1 in 1957. Throughout the years, numerous techniques have been developed to regulate temperatures in spacecraft and space habitats. Initially, passive systems like heat shields and thermal linings were employed, while newer missions embrace active cooling using fluids like ammonia and water. With significant a...
Experimental evaluation of green nanofluids in heat exchanger made oF PDMS
Nobrega, Glauco; Souza, Reinaldo Rodrigues; Cardoso, Beatriz; Afonso, Inês; Pereira, José; Cardoso, Elaine; Moita, Ana; Ribeiro, João; Lima, RuiConventional methods for synthesizing metallic nanoparticles face challenges such as instability and environ mental concerns. Therefore, new, simpler, and more eco-friendly methods are being explored. In this context, the study reports a green synthesis process to produce magnetic iron oxide nanoparticles using an aqueous extract of the alga Chlorella vulgaris. This process leverages natural resources to create...
Green synthesis of nanoparticles from olive oil waste for environmental and hea...
Afonso, Inês Maria Santos; Cardoso, Beatriz; Nobrega, Glauco; Minas, Graça; Ribeiro, João E.; Lima, Rui Alberto Madeira MacedoEnvironmental degradation is a growing concern, driving researchers to explore eco-friendly nanoparticle (NP) synthesis, for diverse applications. Within this context, the employment of olive oil waste (OOW) as a green source for the synthesis of NPs has emerged as a viable alternative to conventional techniques. The olive industry has a significant impact in the Mediterranean region, and alongside it, comes th...
A review of novel heat transfer materials and fluids for aerospace applications
Nobrega, Glauco; Cardoso, Beatriz; Souza, Reinaldo; Pereira, José; Pontes, Pedro; Catarino, Susana Oliveira; Pinho, DianaThe issue of thermal control for space missions has been critical since the early space missions in the late 1950s. The demands in such environments are heightened, characterized by significant temperature variations and the need to manage substantial densities of heat. The current work offers a comprehensive survey of the innovative materials and thermal fluids employed in the aerospace technological area. In ...
Assessing the prebiotic potential of xylooligosaccharides produced by one-step ...
Cordeiro, Ana; Fernandes, Andreia; Sousa, Joana; Cardoso, Beatriz; Alves, Joana; Silvério, Sara; Peres, António M.; Rodrigues, Lígia R.; Amorim, CláudiaA prebiotic is defined as a substrate that is selectively utilized by host microrganisms, conferring a health benefit
Assessing the prebiotic potential of xylooligosaccharides produced by one-step ...
Cordeiro, Ana; Fernandes, Andreia; Sousa, Joana; Cardoso, Beatriz; Alves, Joana; Silvério, Sara; Peres, António M.; Rodrigues, Lígia R.; Amorim, CláudiaThe prebiotic effect is a fundamental concept in the fields of nutrition and gut health, referring to the beneficial effects of specific non-digestible dietary components on the gut microbiota, including xylooligosaccharides (XOS). These compounds function as food sources for beneficial gut bacteria, fostering their growth and activity. In this work, in vitro studies were performed to evaluate the prebiotic pot...
From From politically correct to anti-politically correct
Cardoso, BeatrizAt the current conjuncture, there is a greater sensitivity about what is communicated. In this sense, it is important to explore why there is this growing concern with political correctness and how it affects communication. From a social perspective, one should consider the evolution of what political correctness is, and the differences that have made themselves felt until today, and what the trends will be for...
Tailoring fructooligosaccharides composition with engineered Zymomonas mobilis ZM4
Braga, Adelaide; Gomes, Daniela Filipa Correia; Costa, João Manuel Rainha; Cardoso, Beatriz; Amorim, Cláudia; Silvério, Sara Isabel CruzZymomonas mobilis ZM4 is an attractive host for the development of microbial cell factories to synthesize high-value compounds, including prebiotics. In this study, a straightforward process to produce fructooligosaccharides (FOS) from sucrose was established. To control the relative FOS composition, recombinant Z. mobilis strains secreting a native levansucrase (encoded by sacB) or a mutated -fructofuranosidas...
Engineering Saccharomyces cerevisiae for the one-step production of a functiona...
Amorim, Cláudia; Rodrigues, Joana Lúcia Lima Correia; Braga, Adelaide; Gomes, Daniela Filipa Correia; Costa, João Manuel RainhaFructooligosaccharides (FOS) are recognized prebiotics with proven beneficial effects, usually produced by two-step processes. In this work, an in vivo bioprocess was developed for the one-step production of a functional sweetening mixture containing FOS. Sucrose was directly fermented by yeast towards process simplification and cost reduction. Saccharomyces cerevisiae YIL162W lacking the gene responsible for s...
A (des)proteção de dados pessoais de crianças e adolescentes no âmbito digital ...
Cardoso, BeatrizA presente pesquisa tem por escopo analisar a proteção de dados pessoais, com um enfoque especial especificamente no tratamento dos dados de crianças e adolescentes, constituindo uma análise frente a Lei N° 13.709, de 14 de Agosto de 2018 (Lei Geral de Proteção de dados), a fim de verificar se seus instrumentos são eficientes por si só para garantir a proteção dos dados em questão. Para melhor compreensão da te...