7 documents found, page 1 of 1
Irreversible temperature indicator based cellulose membranes conjugated with le...
Carvalho, Margarida; Tavares, Ana P. M.; Marques. Maria A.; Alves, Joaquim J.; Figueira, Joana; Morais, Maria; Pinto, Joana V.; Moreira, Felismina T. C.This research focuses on the development of thermochromic membranes made of cellulose acetate (CA) for temperature monitoring of sensitive food products. Two dual TC membranes developed for the control of different temperature ranges were formulated using a three-component system: a leuco-dye membrane (crystal violet lactone, CVL) integrated with an acidic membrane containing the color developer (salicylic acid...
Irreversible colorimetric bio-based curcumin bilayer membranes for smart food p...
Pereira, Ariane; Marques, Maria A.; Alves, Joaquim; Morais, Maria; Figueira, Joana; Pinto, Joana V.; Moreira, Felismina T. C.; Moreira, FelisminaResearch into innovative food safety technologies has led to the development of smart packaging with embedded chemical sensors that can monitor food quality throughout the supply chain. Thermochromic materials (TM), which are able to dynamically change colour in response to temperature fluctuations, have proven to be reliable indicators of food quality in certain environments. Natural colourants such as curcumi...
Irreversible temperature indicator based cellulose membranes conjugated with le...
Carvalho, Margarida; Tavares, Ana P. M.; Marques, Maria A.; Alves, Joaquim J.; Figueira, Joana; Morais, Maria; Pinto, Joana V.; Moreira, Felismina T. C.This research focuses on the development of thermochromic membranes made of cellulose acetate (CA) for temperature monitoring of sensitive food products. Two dual TC membranes developed for the control of different temperature ranges were formulated using a three-component system: a leuco-dye membrane (crystal violet lactone, CVL) integrated with an acidic membrane containing the color developer (salicylic acid...
Irreversible colorimetric bio-based curcumin bilayer membranes for smart food p...
Pereira, Ariane; Marques, Maria A.; Alves, Joaquim; Morais, Maria; Figueira, Joana; Pinto, Joana V.; Moreira, FelisminaResearch into innovative food safety technologies has led to the development of smart packaging with embedded chemical sensors that can monitor food quality throughout the supply chain. Thermochromic materials (TM), which are able to dynamically change colour in response to temperature fluctuations, have proven to be reliable indicators of food quality in certain environments. Natural colourants such as curcumi...
Novel Hydrogel Membranes Based on the Bacterial Polysaccharide FucoPol: Design,...
Araújo, Diana; Martins, Matilde; Concórdio-Reis, Patrícia; Roma-Rodrigues, Catarina; Morais, Maria; Delgado Alves, Vitor; Fernandes, AlexandraFucoPol, a fucose-rich polyanionic polysaccharide, was used for the first time for the preparation of hydrogel membranes (HMs) using Fe3+ as a crosslinking agent. This study evaluated the impact of Fe3+ and FucoPol concentrations on the HMs’ strength. The results show that, above 1.5 g/L, Fe3+ concentration had a limited influence on the HMs’ strength, and varying the FucoPol concentration had a more significan...
Water peel-off transfer of electronically enhanced, paper-based laser-induced g...
Pinheiro, Tomás; Correia, Ricardo; Morais, Maria; Coelho, João; Fortunato, Elvira; Sales, M. G. F.; Marques, Ana C.; Martins, RodrigoLaser-induced graphene (LIG) has gained preponderance in recent years, as a very attractive material for the fabrication and patterning of graphitic structures and electrodes, for multiple applications in electronics. Typically, polymeric substrates, such as polyimide, have been used as precursor materials, but other organic, more sustainable, and accessible precursor materials have emerged as viable alternativ...
Práticasteorias pandêmicas: redes educativas, currículos e adoecimento social
Santos, Joana Ribeiro dos; Machado, Marcelo Ferreira; Morais, MariaO artigo apresenta um diálogo a respeito do momento pandêmico vivenciado pelo mundo que, em decorrência do novo coronavírus, evidenciou um novo espaçotempo em nossas redes educativas. Através da conversa com diversos autores como Alves, Santos, Silva, Latour e outros, expomos que o momento é de revermos nossas práticasteorias para atendermos nossos estudantes da melhor forma possível. Nesse contexto, abordamos ...