43 documents found, page 1 of 5
Polydimethylsiloxane surface modification for microfluidic devices and organ-on...
Gonçalves, Inês Maia Silva Rodrigo; Gonçalves, Margarida; Pinho, Diana; Cardoso, Beatriz Dias; Sousa, Patrícia C.; Zille, Andrea; Hori, TakeshiOne of the most popular materials for creating bio models and microfluidic devices is polydimethylsiloxane (PDMS). Recently, a unique class of devices called organs-on-a-chip (OoC) was created by fusing cell cultures with microfluidic devices. To make it easier to investigate both healthy and pathological conditions, these devices replicate the micro physiological characteristics of the human body. OoCs are mos...
Amyloid Storm: An Uncommon Case of AA Amyloid Nephropathy
Domingos, Diogo; Laranjinha, Ivo; Theias Manso, Rita; Matias, Patrícia; Gonçalves, MargaridaAA amyloidosis is a rare disease caused by tissue accumulation of serum amyloid A (SAA), a protein produced in the liverin response to chronic inflammation or infection. Kidney manifestations of AA amyloidosis usually develop gradually.The authors report a case of a 77‑year‑old patient with a previous diagnosis of multifactorial chronic kidney disease andbronchiectasis, who developed sudden onset nephrotic sy...
A First Process-Oriented Characterization of Eriolobus trilobatus (Labill. ex P...
Șen, Umut; Yücedağ, Cengiz; Balcı, Büşra; Arıcı, Şefik; Koçar, Günnur; Şat, Beyza; Viegas, Catarina; Gonçalves, Margarida; Miranda, IsabelFor the first time, Eriolobus trilobatus bark from Turkey has been characterized in terms of its chemical, extractive, fuel, and ash characteristics using SEM–EDS, wet chemical analysis, phenolic analysis, FT-IR, TGA, XRF, XRD, BET surface area measurement, proximate analysis, and ash fusion temperature (AFT) determination. The results showed that the bark contains 13% ash, dominated by calcium oxalate, and 15%...
AS INTERVENÇÕES DE ENFERMAGEM PRÉ-OPERATÓRIAS NÃO FARMACOLÓGICAS QUE CONTRIBUEM...
Quezada, Paula; Pereira, Carla; Delgado, Luis; Gonçalves, MargaridaThe hospitalization of a child is a significant event, with surgical procedures often associated with high levels of anxiety due to the unfamiliar environment and separation from parents or significant caregivers. Preoperative anxiety can lead to psychological and physiological changes that may extend into the postoperative period. In this context, non-pharmacological preoperative nursing interventions play a c...
Relationship between children's dietary habits, screen time and overweight - Es...
Gonçalves, Margarida; Martins, Maria de Fátima; Gaspar, Marta; Sousa, Bruno; Pêgo, Cíntia; Rossoni, Carina; Rito, AnaIntroduction: The prevalence of childhood overweight has been increasing in Portugal. This may be linked to poor dietary habits, sedentary behavior, and excessive screen time, key modifiable risk factors for childhood overweight. Aims: This study evaluated the relationship between dietary habits, screen time and the prevalence of overweight in children participating in Escola Missão Continente study (EMC) on th...
Polydimethylsiloxane surface modification of microfluidic devices for blood pla...
Gonçalves, Margarida; Gonçalves, Inês Maia; Borges, Joel; Faustino, Vera Luísa Carreira; Soares, Delfim; Vaz, Filipe; Minas, GraçaOver the last decade, researchers have developed a variety of new analytical and clinical diagnostic devices. These devices are predominantly based on microfluidic technologies, where biological samples can be processed and manipulated for the collection and detection of important biomolecules. Polydimethylsiloxane (PDMS) is the most commonly used material in the fabrication of these microfluidic devices. Howev...
Pine Nutshells and Their Biochars as Sources of Chemicals, Fuels, Activated Car...
Şen, Ali Umut; Rodrigues, João F.G.; Almeida, Daiana; Fernandes, Ângela; Gonçalves, Margarida; Martins, Marta; Santos, Diogo M.F.; Pereira, HelenaPine nutshells (PNSs) are lignocellulosic waste materials with limited use in domestic heating. However, a biorefinery approach may be applied to fractionate PNSs and produce chemicals, materials, and improved solid fuels. In this study, we fractionated PNSs and produced antioxidant extracts, lignins, polysaccharides, chars, and activated carbons and analyzed their potential applications. Pyrolytic kinetic mode...
Effect of Bark Biochars on Properties of Steam-Activated Carbons
Şen, Umut; Nobre, Catarina; Martins, Marta; Gonçalves, Margarida; Pereira, HelenaBark is a heterogeneous solid material comprising mainly of phloem and cork fractions. These fractions differ in chemical composition and anatomical structure, and value-added activated carbons produced from these fractions have different surface properties. Low-temperature pyrolysis was shown to be a promising method for producing activated carbon precursors from bark fractions at higher yields than convention...
Pine Nutshells and Their Biochars as Sources of Chemicals, Fuels, Activated Car...
Sen, Umut; Rodrigues, João F. G.; Almeida, Daiana; Fernandes, Ângela; Gonçalves, Margarida; Martins, Marta; Santos, Diogo M. F.; Pereira, HelenaPine nutshells (PNSs) are lignocellulosic waste materials with limited use in domestic heating. However, a biorefinery approach may be applied to fractionate PNSs and produce chemicals, materials, and improved solid fuels. In this study, we fractionated PNSs and produced antioxidant extracts, lignins, polysaccharides, chars, and activated carbons and analyzed their potential applica- tions. Pyrolytic kinetic mo...
Chemical composition, morphology, antioxidant, and fuel properties of pine nut ...
Sen, Ali Umut; Correia, Ricardo; Longo, Andrei; Nobre, Catarina; Alves, Octávio; Santos, Margarida; Gonçalves, Margarida; Miranda, IsabelPine nut shells are waste lignocellulosic residues from the production of edible pine nut kernels that are generally only used for energy production by combustion. Lignocellulosic feedstocks, such as pine nut shells, may be valorized namely by their integration into biorefinery schemes. This article set out to analyze the chemical composition, morphology, antioxidant, and fuel properties of pine nut shells from...