108 documents found, page 1 of 11
Fungal growth and mycotoxin production in a new formulated meat product with st...
Guimarães, Ana Cristina Silva Esperança; Martins, A. J.; Cerqueira, M. A.; Pastrana, L. M.; Sousa, P.; Venâncio, ArmandoOne of the major changes in dietary habits of the last half-century has been the increase of meat-based products consumption. This increase has contributed to a diet rich in saturated fats, which can result in adverse health effects. A recent trend in food industry is the development of new meat products based on traditional ones, though having less saturated fats and adding healthy ingredients. In this work, t...
Food-grade hydroxypropyl methylcellulose-based formulations for electrohydrodyn...
Silva, Pedro; Prieto, C.; Lagarón, J. M.; Pastrana, L. M.; Coimbra, M. A.; Vicente, A. A.; Cerqueira, M. A.Electrohydrodynamic (EHD) processing allows the production of micro and nano structures with high surface-area-to-volume ratio from biopolymers and environmentally friendly solvents. Such structures hold a very significant potential for application in the food area. The aim of this work was to assess the role of solution parameters in the formation of hydroxypropyl methylcellulose (HPMC)-based micro and nanostr...
Antimicrobial properties of chitosan and galactomannan composite coatings and p...
Almeida, L. B. S.; Figueiredo, E. A. T.; Dias, F. G. B.; Santos, F. M. S.; Fernandes, Bruno D; Vicente, A. A.; Cerqueira, M. A.; Silva, A. L. C.The aim of this study was to produce antimicrobial coatings and films based on the mixture of chitosan and galactomannan from Adenanthera pavonina L., with the incorporation of sodium acetate. The antimicrobial activity of the coatings was evaluated against L. monocytogenes, S. aureus, P. aeruginosa and S. enteritidis. Then the films produced, based on the coating formulations, were characterized in terms of wa...
Modulating process parameters to change physical properties of bigels for food ...
Fasolin, Luiz Henrique; Martins, Artur J.; Cerqueira, M. A.; Vicente, A. A.The effect of the process parameters involved in the production of bigels was investigated through the study of structural, mechanical and rheological properties. Four level (24) Central Composite Rotational Design (CCRD) configuration was applied in order to study the organogelator concentration, hydrocolloid concentration, organogel:hydrogel ratio and shear of mixing. Gellan gum and high oleic sunflower oil w...
Mid-term post-fire losses of nitrogen and phosphorus by overland flow in two co...
Serpa, D.; Ferreira, R. V.; Machado, A. I.; Cerqueira, M. A.; Keizer, J. J.Wildfires affect vast areas of Mediterranean forests, thereby triggering changes in hydrological and geomorphological processes that can negatively affect both terrestrial and aquatic ecosystems. Although several studies have evaluated the post-fire hydrological and erosive response in burnt forest areas, an important knowledge gap remains with respect to nutrient mobilization by overland flow. To address this ...
Characterization of thyme essential oil by NMR spectroscopy
Sampaio, C. I.; Cerqueira, M. A.; Dias, AliceEssential oils are plants secondary metabolites, which are widely used in the perfumery, food and pharmaceutical industries. In general, volatile oils or essential oils are predominantly constituted by two or three components, mostly terpenic hydrocarbons and terpenoids. Thymus vulgaris L. (Lamiaceae) is native from the southern Europe and the Mediterranean, where it has been used since ancient times as a flavo...
Development of antimicrobial leather modified with AgTiO2 nanoparticles for foo...
Carvalho, Isabel; Ferdov, S.; Mansilla, C.; Marques, S.; Cerqueira, M. A.; Pastrana, L. M.; Henriques, Mariana; Gaidau, C.; Ferreira, P.; Carvalho, S.The proposed work aims to functionalize leathers for footwear industry with antimicrobial properties based on AgTiO2 nanoparticles. The synthesis of nanoparticles was carried out by the hydrothermal method with significant advantages in terms of time, energy savings and low cost. Anatase TiO2 nanoparticles with dimensions below 10nm were obtained as observed by X-ray diffraction and transmission electron micros...
Development of antimicrobial leather modified with Ag-TiO2 nanoparticles for fo...
Carvalho, Isabel; Ferdov, S.; Cerqueira, M. A.; Pastrana, L. M.; Henriques, Mariana; Gaidau, C.; Carvalho, S.[Excerpt] The proposed work aims to functionalize leathers for footwear industry with antimicrobial properties based on Ag-TiO2 nanoparticles. The synthesis of nanoparticles was carried out through an innovative and optimized method. This hydrothermal method is simple and inexpensive and prepares well crystalline materials. The structural characteristics were evaluated by X-ray powder diffraction and the result...
Encapsulation and controlled release of bioactive compounds in lactoferrin-glyc...
Bourbon, A. I.; Cerqueira, M. A.; Vicente, A. A.Curcumin and caffeine (used as lipophilic and hydrophilic model compounds, respectively) were successfully encapsulated in lactoferrin-glycomacropeptide (Lf-GMP) nanohydrogels by thermal gelation showing high encapsulation efficiencies (>90 %). FTIR spectroscopy confirmed the encapsulation of bioactive compounds in Lf-GMP nanohydrogels and revealed that according to the encapsulated compound different interacti...
Beeswax organogels: Influence of gelator concentration and oil type in the gela...
Martins, Artur J.; Cerqueira, M. A.; Fasolin, L.; Cunha, Rosiane L.; Vicente, A. A.This work focused on how different types of oil phase, MCT (medium chain triglycerides) and LCT (long chain triglycerides), exert influence on the gelation process of beeswax and thus properties of the organogel produced thereof. Organogels were produced at different temperatures and qualitative phase diagrams were constructed to identify and classify the type of structure formed at various compositions. The mi...