175 documents found, page 1 of 18
Influence of active material content on the performance of direct ink printed l...
Pinto, Rafael S.; Hilliou, L.; Petrenko, Viktor; Costa, Carlos Miguel Silva; Lanceros-Mendez, S.; Gonçalves, Renato FerreiraDriven by the growing demand for small devices due to the Internet-of-Things concept, lithium-ion batteries (LIBs) represent an essential technology to store energy for portable electronics with specific sizes/requirements. The LIBs' performance is highly dependent on the electrodes' composition/microstructure, particularly the cathode. In this work, it is investigated the influence of different ratios between ...
Development of a natural ingredient based on phenolic compounds from propolis e...
Caicedo Chacon, Wilson Daniel; Araujo, Elder dos Santos; Hilliou, L.; Valencia, Germán AyalaNowadays, there is an increasing consumer demand for more natural and environmentally friendly food additives. The current research aimed to produce and characterize a new additive based on bentonite and the phenolic compounds from green propolis extract, as well as to characterize the effect of this additive on the rheological properties of carrageenan hydrogels. The new additive (biohybrid) was obtained after...
Rheological and structural properties of K-carrageenan/xanthan gum gummies arch...
Valencia, German Ayala; Moraes, Izabel Cristina Freitas; Leandro, Gabriel Coelho; Hilliou, L.Biohybrids (BHs)based on bentonite and anthocyanins can be produced as alternatives to synthetic colorants. However, no information is available on the interaction of biohybrid with food system. This research studies the rheological properties of gummies containing k-carrageenan and xanthan gum incorporated with a BH. The incorporation of BH (≤2% w/w) increased the flow consistency index and shear thinning effe...
Multifunctional magneto-plasmonic lipogel based on peptide hydrogel for applica...
Gomes, Valéria; Veloso, Sérgio R. S.; Carvalho, André; Hilliou, L.; Coutinho, Paulo J. G.; Moura, C.; Martins, J. A. R.; Castanheira, Elisabete M. S.Supramolecular hydrogels, particularly low-molecular-weight peptide hydrogels, are promising drug delivery systems due to their ability to change the solubility, targeting, metabolism and toxicity of drugs. Magneto-plasmonic liposomes, in addition to being remotely controllable with the application of an external magnetic field, also increase the efficiency of encapsulated drug release through thermal stimulati...
From the seaweeds’ carrageenan composition to the hybrid carrageenans’ hydrogel...
Hilliou, L.; Moraes, Izabel Cristina Freitas; Almeida, Pedro LúcioThe carrageenan composition of 12 commercial seaweeds used in the production of hybrid carrageenans (HC) is estimated from the analysis of solid-state NMR spectra and is systematically compared with the chemical structure of HC extracted in hot water. 1 H NMR showed that the isolated HC contain from 5 to 80 mol% kappacarrageenan, from 90 to 10 mol% iota-carrageenan, while from 8 to 23 mol% biological precursors...
Tripeptides featuring dehydrophenylalanine and homophenylalanine: homo- versus ...
Carvalho, André F.; Pereira, Teresa; Oliveira, Carlos; Figueiredo, Pedro; Carvalho, Alexandra; Pereira, David M.; Hilliou, L.; Bañobre-López, ManuelOver the years, our research group developed dehydrodipeptides N-capped with aromatic moieties as protease-resistant efficacious hydrogelators, affording self-assembled hydrogels at low (critical) concentrations. Dehydrotripeptides, with different dipeptide sequences and (D,L) stereochemistry, open a wider chemical space for the development of self-assembled soft nanomaterials. In this work, a small library of ...
Tailoring P(3HB-co-3HV) Properties by Post-Production Blending
Viana, Jorge M. P.; Matos, Mariana; Hilliou, L.; Reis, Maria[Excerpt] Introduction: Polyhydroxyalkanoates (PHAs) are promising biopolymers for replacing less eco friendly polymers, although their price is still higher. PHAs can be produced via mixed microbial cultures (MMC) from carbon-rich waste to reduce costs; however, this process has challenges due to the variability in waste composition and seasonality [1]. The most common PHA copolymer produced from wastes by MMC...
Self-assembly pathway influence on Dehydropeptide-based gel properties and drug...
Veloso, Sérgio R S; Vijayakanth, Thangavel; Shankar, Sudha; Fridman, Natalia; Rencus-Lazar, Sigal; Hilliou, L.; Rodrigues, Pedro V.; Moura, C.Low-molecular-weight peptide-based hydrogels formed through self-assembly have emerged as promising candidates for biomedical applications. While the self-assembly process is known to affect the network morphology, its impact on mechanical properties and drug delivery remains poorly understood. In this work, it is explored how different gelation conditions influence the morphology, properties, and drug release ...
Role of the molecular mass on the elastic properties of hybrid carrageenan hydr...
Gonçalves, Maria Gabriela Afonso; Faria, Bruno Miguel Silva; Moraes, Izabel Cristina Freitas; Hilliou, L.A set of carrageenans produced in the potassium form and with chemical structures varying from pure iota-carrageenans to nearly pure kappa-carrageenans is submitted to ultrasonication to reduce their molecular masses Mw while maintaining a constant chemical structure and a polydispersity index around 2. The kinetics of ultrasound-induced chain scission are found to be slower for polysaccharides richer in kappa-...
Hybrid carrageenans versus kappa–Iota-carrageenan blends: a comparative study o...
Monteiro, Maria Alice Freitas; Faria, Bruno; Moraes, Izabel Cristina Freitas; Hilliou, L.A comparison between the gel properties of blends of kappa- and iota-carrageenans (K+Is) and hybrid carrageenans (KIs) with equivalent chemical compositions is here presented. The objective is to assess under which conditions hybrid carrageenans are valuable alternative to blends of kappa- and iota-carrageenans for gelling applications and to contribute to the identification of phase-separated structures or co-...