Consulta: creatorFacets:"Parada,José Luis"
Registros recuperados: 3
Data/hora: 11/06/2024 11:25:52

Bovine mastitis in the metropolitan area of Curitiba: antibiotic resistance and antimicrobial control of the infection
Provedor de dados: 52
Autores: Parada,José Luis; Gonçalves,Dicezar; Soccol,Vanete Tomaz; Lima,Marisa; Soccol,Carlos Ricardo.
A study from cows with mastitis was performed and Staphylococcus aureus was the predominant pathogen in 46.4 % among 153 studied strains from 276 milk samples of infected cows. Antibiotic resistance of 71 S. aureus isolates was determined in order to search resistant strains to antibiotics of clinical interest, as well as to determine their degree of multi-resistance. It was found that 60% of the S. aureus strains presented resistance to β-lactams, but none to oxacillin, teicoplamin or vancomycin. On the other hand, with the aim of reducing the use of current antibiotics and their associated resistance, a new formulation was introduced. The antimicrobial compounds (P22-P32), demonstrated to be effective in 55% of the 76 mastitis cases studied. The use of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mastitis; Staphylococcus aureus; Antibiotic resistance; Infection reduction.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400009

Recovery of phytase produced by solid-state fermentation on citrus peel
Provedor de dados: 52
Autores: Rodríguez-Fernández,Daniel Ernesto; Rodríguez-León,José Angel; Carvalho,Júlio Cesar de; Thomaz-Soccol,Vanete; Parada,José Luis; Soccol,Carlos Ricardo.
The extraction of phytase produced by solid-state fermentation of citrus peel was studied employing a multistage leaching process. It was observed that the extracts containing EDTA retained over 90% of phytase activity at room temperature after 24 h after the leaching. A fractional design 2² (with 4 replicates at the central point) was carried out for testing the pH and agitation as process independent factors. Only the interaction between the pH and agitation showed a significant influence. These factors were optimized with a central composite design. Agitation at 300 rpm and pH at 5.0 were the best conditions to extract the enzyme from solid matrix. The modeling of the process indicated that diffusivity of the enzyme in the solvent was the controlling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Recovery multistage; Phytase; Solid state fermentation; Kinetic models.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600026

Bacteriocins from lactic acid bacteria: purification, properties and use as biopreservatives
Provedor de dados: 52
Autores: Parada,José Luis; Caron,Carolina Ricoy; Medeiros,Adriane Bianchi P.; Soccol,Carlos Ricardo.
Biopreservation systems in foods are of increasing interest for industry and consumers. Bacteriocinogenic lactic acid bacteria and/or their isolated bacteriocins are considered safe additives (GRAS), useful to control the frequent development of pathogens and spoiling microorganisms in foods and feed. The spreading of bacterial antibiotic resistance and the demand for products with fewer chemicals create the necessity of exploring new alternatives, in order to reduce the abusive use of therapeutic antibiotics. In this context, bacteriocins are indicated to prevent the growth of undesirable bacteria in a food-grade and more natural way, which is convenient for health and accepted by the community. According to their properties, structure, molecular weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactic acid bacteria; Bacteriocins; Purification; Food preservation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300018