13 documents found, page 1 of 2
A simple ultraperformance liquid chromatography mass spectrometry method for th...
Oliveira, Carla M.; Campos, Inês; Vidigal, Susana S. M. P.; Pintado, Manuela E.; Oliveira, Catarina S. S.A simple, precise, and rapid ultra-performance liquid chromatography method for cortisol quantification in sea bass plasma, based on LC-ESI-UHR-QqTOF-MS, was optimised using tolperisone as internal standard. Sea bass plasma samples containing cortisol were spiked with tolperisone as internal standard and extracted with acetonitrile. Samples were vortexed and centrifuged at 15,000g for 10 min at 4 °C. The final ...
In vivo study of the effect of sugarcane bagasse lignin supplementation on broi...
Carvalho, Nelson Mota de; Souza, Carla Giselly de; Costa, Célia Maria; Castro, Cláudia; Fangueiro, Joana F.; Horta, Bruno; Outor-Monteiro, DivanildoSince the global restrictions on antibiotics in poultry systems, there has been a growing demand for natural and sustainable feed additives for disease prevention and poultry nutrition. This study evaluated the effects of incorporating sugarcane bagasse (SCB) lignin into broiler chicken diets. The performance of the chickens, including body weight, feed intake, and mortality, as well as intestinal histomorphome...
Polyhydroxyalkanoates from industrial cheese whey: production and characterizat...
Carvalheira, Mónica; Hilliou, Loic; Oliveira, Catarina S. S.; Guarda, Eliana C.; Reis, Maria A. M.The composition of polyhydroxyalkanoate (PHA) monomers affects the properties and final applications of PHA polymers. This study focused on the feasibility of producing tailored PHA differing in hydroxyvalerate (HV) content, through manipulation of the acidogenic fermented stream composition, and on the characterization of PHA properties to determine the best composition for melt processing. Cheese whey was use...
Valorization of spent sugarcane fermentation broth as a source of phenolic comp...
Oliveira, Carla Maria; Horta, Bruno; Leal, Tânia; Pintado, Manuela; Oliveira, Catarina S. S.A methodology based on a solid phase extraction (SPE) was optimized for the recovery of phenolic compounds from the spent fermentation broth generated from Biofene® (trans-β-farnesene) production. For this purpose, two resins (XAD-2 and HP-20) and three desorption solutions (water, 50/50 ethanol/water, and ethanol) were tested. The most efficient resin revealed to be the HP-20, using ethanol as desorption solut...
Polyhydroxyalkanoates from industrial cheese whey: production and characterizat...
Carvalheira, Mónica; Hilliou, L.; Oliveira, Catarina S. S.; Guarda, Eliana C.; Reis, Maria A. M.The composition of polyhydroxyalkanoate (PHA) monomers affects the properties and final applications of PHA polymers. This study focused on the feasibility of producing tailored PHA differing in hydroxyvalerate (HV) content, through manipulation of the acidogenic fermented stream composition, and on the characterization of PHA properties to determine the best composition for melt processing. Cheese whey was use...
Valorization of sugarcane by-products through synthesis of biogenic amorphous s...
Costa, Joana R.; Capeto, Ana Paula; Pereira, Carla F.; Pedrosa, Sílvia S.; Mota, Inês F.; Burgal, João da Silva; Pintado, Ana I.; Pintado, Manuela E.Ashes from sugarcane by-product incineration were used to synthesize silica powders through alkaline hot extraction, followed by ethanol/acid precipitation or the sol–gel method. Both production methods allowed amorphous spherical silica microparticles with sizes ranging from 1–15 μm and 97% purity to be obtained. Water absorption ranged from 135–155 mL/100 g and 150–250 mL/100 g for precipitated silica and sil...
Impact of fermentation residues on the thermal, structural, and rheological pro...
Hilliou, L.; Machado, Diogo; Oliveira, Catarina S. S.; Gouveia, Ana R.; Reis, Maria A. M.; Campanari, Sabrina; Villano, Marianna; Majone, MauroThe effects of recovered residues on the characteristics of polyhydroxy(butyrate-co-valerate) (PHBV) produced from mixed microbial cultures (MMCs) fed with cheese whey, olive oil mill wastewater, or a synthetic mixture of acetic and propionic acid were investigated. The different types of MMC PHBVs were extracted and purified with different downstream routes; this enabled the recovery of polymers with different...
Effects of fermentation residues on the melt processability and thermomechanica...
Hilliou, L.; Teixeira, Paulo Francisco; Machado, Diogo Silva; Covas, J. A.; Oliveira, Catarina S. S.; Duque, Anouk F.; Reis, Maria A. M.Two polyhydroxy(butyrate-co-valerate) (PHBV) produced from mixed microbial cultures (MMC) fed with fermented cheese whey (CW) and recovered with different down streaming routes, were processed into filaments by plasticating extrusion. The thermorheological characteristics were improved when fermentation residues were recovered together with the MMC PHBV polymer. Thermogravimetric analysis of the extruded filame...
Characterization of polyhydroxyalkanoate blends incorporating unpurified biosus...
Martínez-Abad, Antonio; Cabedo, Luis; Oliveira, Catarina S. S.; Hilliou, L.; Reis, Maria; Lagarón, José MaríaPoly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) produced by mixed bacterial cultures derived from a cheese whey (CW) industrial by-product (unpurified PHBV; u-PHBV) was incorporated into commercial PHBV without previous purification or isolation processes. The presence of certain impurities was evident as investigated by scanning electron microscopy. The crystallinity of the polymer fraction was decreased b...
Effects of residues on the degradation of PHA produced from mixed microbial cul...
Hilliou, L.; Teixeira, P. F.; Machado, Diogo Silva; Covas, J. A.; Oliveira, Catarina S. S.; Gouveia, Ana; Reis, Maria A. M.Thermal degradation upon melting is one of the major drawbacks reported for polyhydroxyalkanoates (PHA). However, the role of residues originating from the fermentation and the extraction steps on the thermal stability of this class of biopolymers still needs to be clarified. In the particular case of PHA produced from mixed microbial cultures (MMC), this topic is even less documented in the literature. Here, t...