13 documents found, page 1 of 2
Photoinactivation of sulfate-reducing bacteria using 1,9-dimethyl-methylene blu...
Santos, Gustavo Vital dos; Moura, Hesrom Fernandes Serra; Crugeira, Pedro Jorge Louro; Silva, Anna Paula Lima Teixeira daAnnually, the oil and gas industry faces equipment losses and product quality degradation due to the presence of sulfate-reducing bacteria (SRB). Given the negative impact of SRB, this study evaluates the use of photoinactivation (PI) with zinc chloride double salt of 1,9-Dimethyl-Methylene Blue (DMMB) as a photosensitizer (PS) in varying concentrations and combined with Laser light at different exposures in an...
Patente Nacional Nº 118006 - Método de produção de goma xantana com bagaço húmi...
Crugeira, Pedro Jorge Louro; Barreiro, M.F.; Almeida, Heloísa Helena Scorsato de; Pires, Marcella Golini; Rafael, Helder MartinsO presente invento refere-se a um processo de produção de goma xantana, a partir da cepa de Xanthomonas campestris atcc 33913, com o uso do bagaço húmido da azeitona, proveniente da extração do azeite em sistema contínuo de duas fases. O método utiliza o bagaço húmido de azeitona pasteurizado até uma concentração de 45% suplementado com 2,0% de sacarose para meio de produção. Os polifenóis, poli...
Disclosing the potential of Cupressus leylandii A.B. Jacks & Dallim, Eucalyptus...
Almeida, Heloísa H.S.; Crugeira, Pedro Jorge Louro; Amaral, Joana S.; Rodrigues, Alírio; Barreiro, M.F.Antimicrobial resistance is a major global health concern, threatening the effective prevention and treatment of infections caused by microorganisms. These factors boosted the study of safe and green alternatives, with hydrosols, the by-products of essential oils extraction, emerging as promising natural antimicrobial agents. In this context, four hydrosols obtained from Cupressus leylandii A.B. Jacks & Dallim,...
Copper-induced exopolysaccharide production by Lelliottia amnigena strain LABEM
Sampaio, Igor Carvalho F.; Moura, Isabela Viana L. de; Crugeira, Pedro Jorge Louro; Widmer, Luiz Fernando; Oliveira, Jairo P. de; Cassini, Servio T.A.Exopolysaccharide (EPS) prodcution is a general mechanism employed by bacteria to thrive under stressful conditions. We report an increase in the production of EPS by Lelliottia amnigena strain LABEM through CuSO4 exposure along with the use of low-cost carbon sources, namely sucrose (SUC) and crude glycerin (CG). The production of EPS was analyzed in relation to yield, and characterized by Fourier transform in...
Exploring Innovative Exogenous Green Stimulus Methods for Boosting Bioprocesses...
Sampaio, Igor Carvalho Fontes; Moura, Isabela Viana Lopes de; Crugeira, Pedro Jorge Louro; Chinalia, Fábio Alexandre; Matos, Josilene Borges Tores LimaThis book chapter provides an overview of the innovative exogenous green stimulus methods of electric, magnetic, and ultrasound stimulation and their appli- cations in boosting bioprocesses. These non-invasive and non-toxic techniques have been shown to enhance the metabolic activity and stress response of various micro- bial systems, including bacteria, yeasts, fungi, and microalgae, leading to increased yield...
Effect of photostimulation through red LED light radiation on natural fermentat...
Martins, Fátima; Ramalhosa, Elsa; Rodrigues, Nuno; Pereira, J.A.; Baptista, Paula; Barreiro, M.F.; Crugeira, Pedro Jorge LouroIn this study, for the first time, red LED light radiation was applied to the fermentation process of table olives using the Negrinha de Freixo variety. Photostimulation using LED light emission (630 ± 10 nm) is proposed to shorten and speed up this stage and reduce time to market. Several physical-chemical characteristics and microorganisms (total microbial count of mesophilic aerobic, molds, yeasts, and lacti...
Photodynamic antimicrobial therapy (A-PDT) using 1,9-Dimethyl-Methylene Blue zi...
Soares, Luiz G.P.; Almeida, Cristiane G. de; Crugeira, Pedro Jorge Louro; Nunes, Iago P.F.; Silva, Anna P.L.T. da; Almeida, Jeovana A.Orthodontic treatment involves the use of apparatuses that impairs oral hygiene making patients susceptible to periodontal diseases and caries. To prevent increased antimicrobial resistance A-PDT has shown itself a feasible option. The aim of this investigation was to assess the efficiency of A-PDT employing 1,9-Dimethyl-Methylene Blue zinc chloride double salt -DMMB as a photosensitizing agent combined with re...
Oilfield carbonated produced water recycling coupled to exopolysaccharide trans...
Sampaio, Igor Carvalho Fontes; Ferreira, Joalene de Azevedo Santos; Crugeira, Pedro Jorge Louro; Oliveira, Ian M. da Silva; Santos, Jacson NunesIt was tested the production of a viscous exopolysaccharide (EPS) by Lelliottia amnigena using different concentrations (10, 15, 25, 50 and 100%) of produced water (PW) and Dialyzed PW (DPW) at 100% concentration, with a nutrient medium based on glycerin and sucrose as carbon sources in 44 h batches. There was an increase in EPS recovery when used PW up to a concentration of 25%. The viscosity of the EPS soluti...
Biosynthesis of antioxidant xanthan gum by Xanthomonas campestris using substra...
Crugeira, Pedro Jorge Louro; Almeida, Heloísa H.S.; Marcet, Ismael; Rendueles, Manuel; Pires, Marcella Golini; Rafael, Helder MartinsMoist olive pomace (MOP) is a high moisture content by-product of the olive oil industry. Managing this recalcitrant residue (transport, storage, and drying) is a priority demanding investment in finding alternative valorisation routes. In this context, the biosynthesis of xanthan gum (XG) incorporating MOP in the substrate (0.0 %, 5.0 %, 10.0 %, 15.0 %, 20.0 %, 25.0 %, 30.0 % and 50.0 %) to induce bacterial st...
Photodynamic inactivation of Staphylococcus aureus by ecological antibacterial ...
Crugeira, Pedro Jorge Louro; Almeida, Heloísa H.S.; Teixeira, Liandra Gracher; Barreiro, M.F.Antimicrobial resistance is a problem in contemporary society, with Staphylococcus aureus standing out as a threat due to its ability to colonize, its pathogenicity, and its expression of several virulence factors. In this context, antimicrobial photodynamic inactivation (aPDI) emerges as an alternative to conventional microbicidal or microbiostatic systems, enabling numerous and successive applications without...