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Hydrogel bioinks of alginate and curcumin-loaded cellulose ester-based particle...

Carvalho, João P. F.; Teixeira, Maria C.; Lameirinhas, Nicole S.; Matos, Filipe S.; Luís, Jorge L.; Pires, Liliana; Oliveira, Helena; Oliveira, Martinho

3D bioprinting is a versatile technique that allows the fabrication of living tissue analogs through the layer-by-layer deposition of cell-laden biomaterials, viz. bioinks. In this work, composite alginate hydrogel-based bioinks reinforced with curcumin-loaded particles of cellulose esters (CEpCUR) and laden with human keratinocytes (HaCaT) are developed. The addition of the CEpCUR particles, with sizes of 740 ...


Thermo‐Responsive Microemulsions Containing Deep Eutectic‐Based Antibiotic Form...

Pedro, Sónia N.; Gomes, Ana T. P. C.; Vilela, Carla; Vitorino, Carla; Fernandes, Rosa; Almeida, Adelaide; Amaral, Maria Helena; Freire, Mara G.

The rise of antibiotic resistant strains, as methicillin-resistant Staphylococcus aureus (MRSA), challenges the current treatment of infections. In the case of ocular infections, antibiotic eye drops are commonly prescribed. However, their efficacy is usually compromised by the low viscosity of these formulations and the eye drainage. To overcome these drawbacks, deep eutectic solvent (DES)-based microemulsions...


Deep Eutectic Solvents as alternative solvents in Antimicrobial Photodynamic Th...

Vieira, Cátia; Bartolomeu, Maria; Pedro, Sónia N.; Gomes, Ana T. P. C.; Dias, Cristina J.; Gamelas, Sara R. D.; Lourenço, Leandro M. O.


Thermo-responsive microemulsions containing deep eutectic-based antibiotic form...

Pedro, Sónia N.; Gomes, Ana T. P. C.; Vilela, Carla; Vitorino, Carla; Fernandes, Rosa; Almeida, Adelaide; Amaral, Maria Helena; Freire, Mara G.

The rise of antibiotic resistant strains, as methicillin-resistant Staphylococcus aureus (MRSA), challenges the current treatment of infections. In the case of ocular infections, antibiotic eye drops are commonly prescribed. However, their efficacy is usually compromised by the low viscosity of these formulations and the eye drainage. To overcome these drawbacks, deep eutectic solvent (DES)-based microemulsions...


Investigation of the potential of deep eutectic solvents (DES) as alternative s...

Vieira, Cátia; Bartolomeu, Maria; Pedro, Sónia N.; Gomes, Ana T. P. C.; Dias, Cristina J.; Gamelas, Sara R. D.; Lourenço, Leandro M. O.

Antimicrobial Photodynamic Therapy (aPDT) is gaining recognition as an effective approach for the photoinactivation of a broad spectrum of microorganisms [1,2]. Due to their apolar behavior, photosensitizers (PS) often have low solubility in aqueous media requiring the use of toxic organic solvents that are incompatible with their application in the field [4]. In this study, the potential of Deep Eutectic Solve...


Bioactive Bacterial Nanocellulose Membranes Enriched with Eucalyptus globulus L...

Almeida, Tânia; Moreira, Patrícia; Sousa, Fábio; Pereira, Cláudia; Silvestre, Armando J. D.; Vilela, Carla; Freire, Carmen S. R.

Bacterial nanocellulose (BNC) membranes, with remarkable physical and mechanical properties, emerged as a versatile biopolymeric carrier of bioactive compounds for skin care applications. In this study, BNC membranes were loaded with glycerol (as plasticizer and humectant agent) and different doses (1-3 μg cm-2) of an aqueous extract obtained from the hydro-distillation of Eucalyptus globulus Labill. leaves (HD...


BiLaWO6: Er3+/Tm3+/Yb3+ phosphor: study of multiple fluorescence intensity rati...

Pavani, K.; Neves, A. J.; Pinto, Ricardo J. B.; Freire, Carmen S. R.; Soares, M. J.; Graça, M. P. F.; Kumar, K. Upendra; Jakka, S.K.


Deep Eutectic Solvent Formulations and Alginate-Based Hydrogels as a New Partne...

Pedro, Sónia N.; Mendes, Maria S. M.; Neves, Bruno M.; Almeida, Isabel Filipa; Costa, Paulo; Correia-Sá, Inês; Vilela, Carla; Freire, Mara G.

The transdermal administration of nonsteroidal anti-inflammatory drugs (NSAIDs) is a valuable and safer alternative to their oral intake. However, most of these drugs display low water solubility, which makes their incorporation into hydrophilic biopolymeric drug-delivery systems difficult. To overcome this drawback, aqueous solutions of bio-based deep eutectic solvents (DES) were investigated to enhance the so...


Improved production of 5-hydroxymethylfurfural in acidic deep eutectic solvents...

Morais, Eduarda S.; Freire, Mara G.; Freire, Carmen S. R.; Silvestre, Armando J. D.

Hydroxymethylfurfural (5-HMF) is a key platform chemical, essential for the production of other chemicals, as well as fuels. Despite its importance, the production methods applied so far still lack in sustainability. In this work, acidic deep eutectic solvents (DES), acting both as solvent and catalyst, were studied for the conversion of fructose into 5-HMF using microwave-assisted reactions. These solvents wer...


Boosting antibiotics performance by new formulations with deep eutectic solvents

Pedro, Sónia N.; Gomes, Ana T. P. C.; Oskoei, Párástu; Oliveira, Helena; Almeida, Adelaide; Freire, Mara G.; Silvestre, Armando J. D.

The critical scenario of antimicrobial resistance to antibiotics highlights the need for improved therapeutics and/or formulations. Herein, we demonstrate that deep eutectic solvents (DES) formulations are very promising to remarkably improve the solubility, stability and therapeutic efficacy of antibiotics, such as ciprofloxacin. DES aqueous solutions enhance the solubility of ciprofloxacin up to 430-fold whil...


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