|
|
|
Registros recuperados: 35 | |
|
| |
|
| |
|
|
Martinis,Elaine C.P. De; Públio,Márcia R.P.; Santarosa,Priscila R.; Freitas,Flávia Z.. |
Twenty samples of Brazilian meat and meat products were screened by the agar overlay method for bacteriocin-producing lactic acid bacteria, using Lactobacillus sake ATCC 15521 as indicator strain. Based on Gram staining, KOH reaction, catalase test and fermentation of 49 carbohydrates (API 50 CH), three out of seven isolates with confirmed antagonist properties were identified as Lactobacillus curvatus, one as Leuconostoc mesenteroides and one as Leuconostoc sp. Two isolates could not be properly identified using these tests. The inhibitors produced by these strains were sensitive to proteases. Inhibition due to lytic bacteriophages was ruled out, so the isolates were classified as bacteriocin-producing lactic acid bacteria. Four of them presented... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactic acid bacteria; Meat; Bacteriocins; Biopreservation; Listeria monocytogenes. |
Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000100008 |
| |
|
|
Nascimento,Maristela da Silva do; Moreno,Izildinha; Kuaye,Arnaldo Yoshiteru. |
This study investigated the antimicrobial activity of Enterococcus faecium FAIR-E 198 against Bacillus cereus, Listeria monocytogenes and Staphylococcus aureus. Using the critical-dilution method, the bacteriocin produced by E. faecium FAIR-E 198 inhibited all L. monocytogenes strains evaluated (1,600 to 19,200 AU mL-1). However, none of the B. cereus and S. aureus strains investigated were inhibited. The maximum activity of this bacteriocin (800 AU mL-1) was observed in MRS broth, while the activity in milk was 100 AU mL-1. In the co-cultivation test in milk, B. cereus K1-B041 was reduced to below the detection limit (1.00 log CFU mL-1) after 48 h. E. faecium reduced the initial L. monocytogenes Scott A population by 1 log CFU mL-1 after 3 h at 35ºC.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enterococcus faecium; Bacteriocin; Biopreservation; Gram-positive pathogen. |
Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100013 |
| |
|
|
Furtado,Danielle N.; Todorov,Svetoslav D.; Landgraf,Mariza; Destro,Maria T.; Franco,Bernadette D.G.M.. |
Listeria monocytogenes is a pathogen frequently found in dairy products. Its control in fresh cheeses is difficult, due to the psychrotrophic properties and salt tolerance. Bacteriocinogenic lactic acid bacteria (LAB) with proven in vitro antilisterial activity can be an innovative technological approach but their application needs to be evaluated by means of in situ tests. In this study, a novel bacteriocinogenic Lactococcus lactis strain (Lc. lactis DF4Mi), isolated from raw goat milk, was tested for control of growth of L. monocytogenes in artificially contaminated fresh Minas type goat cheese during storage under refrigeration. A bacteriostatic effect was achieved, and counts after 10 days were 3 log lower than in control cheeses with no added LAB.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteriocin; Lc. lactis subsp. lactis; Biopreservation; Fresh cheese; Goat cheese. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100201 |
| |
|
|
Furtado,Danielle N.; Todorov,Svetoslav D.; Landgraf,Mariza; Destro,Maria T.; Franco,Bernadette D.G.M.. |
Lactic acid bacteria capable of producing bacteriocins and presenting probiotic potential open innovative technological applications in the dairy industry. In this study, a bacteriocinogenic strain (Lactococcus lactis subsp. lactis DF4Mi) was isolated from goat milk, and studied for its antimicrobial activity. The bacteriocin presented a broad spectrum of activity, was sensitive to proteolytic enzymes, resistant to heat and pH extremes, and not affected by the presence of SDS, Tween 20, Tween 80, EDTA or NaCl. Bacteriocin production was dependent on the components of the culture media, especially nitrogen source and salts. When tested by PCR, the bacteriocin gene presented 100% homology to nisin Z gene. These properties indicate that this L. lactis subsp.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteriocin; Probiotic; Lc. lactis subsp; Lactis; Biopreservation; Goat milk. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400052 |
| |
|
|
Furtado,Danielle N.; Todorov,Svetoslav D.; Landgraf,Mariza; Destro,Maria T.; Franco,Bernadette D.G.M.. |
Lactic acid bacteria capable of producing bacteriocins and presenting probiotic potential open innovative technological applications in the dairy industry. In this study, a bacteriocinogenic strain (Lactococcus lactis subsp. lactis DF4Mi) was isolated from goat milk, and studied for its probiotic potential. Lc. lactis DF4Mi was resistant to acidic pH and oxbile, presented co-aggregation with Listeria monocytogenes, and was not affected by several drugs from different generic groups, being sensitive to most tested antibiotics. These properties indicate that this Lc. lactis strain can be used for enhancement of dairy foods safety and quality, in combination with potential probiotic properties. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteriocin; Probiotic; Lc. lactis subsp. lactis; Biopreservation; Goat milk. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300038 |
| |
|
| |
|
|
Brillet, Anne; Pilet, M; Prevost, H; Bouttefroy, A; Leroi, Francoise. |
The aim of this study was to demonstrate the inhibitory capacity of Carnobacterium strains against a collection of Listeria monocytogenes strains in cold-smoked salmon (CSS). Methods and Results: Three bacteriocin-producing strains, Carnobacterium divergens V41, C. piscicola V1 and C. piscicola SF668, were screened for their antilisterial activity against a collection of 57 L. monocytogenes strains selected from the French smoked salmon industry, using an agar spot test. All the Listeria strains were inhibited but three different groups could be distinguished differing in sensitivity to the three Carnobacterium strains. However, C. divergens V41 always had the highest inhibitory effect. The antilisterial capacity was then tested in sterile CSS blocks... |
Tipo: Text |
Palavras-chave: Listeria monocytogenes; Cold smoked salmon; Carnobacterium; Biopreservation; Bacteriocin. |
Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-610.pdf |
| |
|
| |
|
|
FARIAS, I. P.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; COUTINHO, M. E.; MAGNUSSON, W. E.; VALADÃO, R. M.; CAMPOS, Z.. |
Caiman crocodilus habita praticamente todos os tipos de ambientes de zonas úmidas de baixa altitude na região Neotropical, sendo a espécie dentre os crocodilianos com maior distribuição na América Latina. No Brasil, ocorre naturalmente na região Norte e em parte das regiões Centro-Oeste e Nordeste, sua extensão de ocorrência estimada para o país é de 5.525.664 km². É uma espécie adaptável a ambientes antropizados, podendo ser encontrada em todos os habitat fluviais e lacustres presentes dentro de sua área de distribuição, ocorrendo em grande número ao longo das bacias Amazônica e Tocantins/Araguaia, especialmente em rios de água branca. Embora C. crocodilus sofra pressão devido ao uso ilegal (caça), destruição e perda de habitat, principalmente em... |
Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148385 |
| |
|
|
BASSETTI, L. A.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; COUTINHO, M. E.; FARIAS, I. P.; MAGNUSSON, W. E.; VALADÃO, R. M.; CAMPOS, Z.. |
Caiman latirostris apresenta ampla distribuição latitudinal na América do Sul, compreendendo Argentina, Bolívia, Brasil, Paraguai e Uruguai. No território brasileiro, ocorre nas Regiões Hidrográficas do São Francisco, Atlântico Nordeste Oriental, Atlântico Leste, Atlântico Sudeste, Atlântico Sul, Paraná e do Uruguai, com registros do Nordeste ao Sul do país. Essa espécie é encontrada naturalmente nos biomas Cerrado, Caatinga, Mata Atlântica e Pampa, tendo sido introduzida no Pantanal. Sua extensão de ocorrência estimada para o Brasil é de 2.626.662 km², correspondendo a mais de 70% da distribuição global; com densidades variáveis ao longo de sua distribuição. Caiman latirostris ocorre em ambientes lênticos, sendo frequentemente encontrado em lagoas... |
Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Extinction; Wild animals; Biopreservation. |
Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148373 |
| |
|
|
CAMPOS, Z.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; COUTINHO, M. E.; FARIAS, I. P.; MAGNUSSON, W. E.; VALADÃO, R. M.. |
Caiman yacare é encontrado nas regiões alagadas do nordeste e leste da Bolívia, no Pantanal brasileiro e afluentes do rio Madeira, no Paraguai e no nordeste da Argentina. Sua extensão de ocorrência estimada para o território brasileiro é de 547.865 km². Os levantamentos populacionais confirmam que, no Pantanal brasileiro, Caiman yacare apresenta uma das mais vigorosas populações naturais de crocodilianos no mundo, com densidades superiores a 100 ind/km², distribuídos por toda planície Pantaneira. O tamanho populacional em toda essa região está na ordem de milhões de indivíduos. Aparentemente, esta espécie apresenta maior resiliência às alterações ambientais e à caça do que as demais espécies de crocodilianos brasileiros. Há conectividade com populações dos... |
Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148386 |
| |
|
| |
|
| |
|
|
JIMÉNEZ-VILLEDA,Perla-Yesenia; RODRÍGUEZ-HERNÁNDEZ,Adriana-Inés; LÓPEZ-CUELLAR,Ma.-del-Rocío; FRANCO-FERNÁNDEZ,Melitón-Jesús; CHAVARRÍA-HERNÁNDEZ,Norberto. |
Abstract Films were prepared with 0.2% (w/v) gellan gum, 1% (w/v) citric pectin, 0.5% (w/v) glycerol, 5 mM CaCl2, 0.05 M Ethylenediaminetetraacetic acid (EDTA), and different concentrations of an antimicrobial activity-concentrated supernatant (AMC) obtained from fermentations of Streptococcus infantarius, which produces bacteriocin-like inhibitory substances (i.e., treatments F1, F2 and F3 with 75, 90 and 120 arbitrary units (AU)/mL, respectively). The treatments were based on a minimum-inhibitory-concentration (i.e., AMC, 90 AU/mL, plus EDTA, 0.05 M) for Escherichia coli, Staphylococcus aureus and Listeria monocytogenes growing in brain-heart-infusion medium at 35 °C. The films hindered the bacterium growth in selective media: E. coli -MacConkey, S.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactic acid bacterium; Bacteriocins; Biopreservation; Mechanical properties; Gas permeability. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000200436 |
| |
|
| |
|
|
El Kheir, Sara M.; Cherrat, Lamia; Awussi, Ahoefa A.; Ramia, Nancy E.; Taha, Samir; Rahman, Abdur; Passerini, Delphine; Leroi, Francoise; Petit, Jeremy; Mangavel, Cecile; Revol-junelles, Anne-marie; Borges, Frederic. |
This article describes a method for high-throughput competition assays using a bioluminescent strain of L. monocytogenes. This method is based on the use of the luminescent indicator strain L. monocytogenes EGDelux. The luminescence of this strain is correlated to growth, which make it suitable to monitor the growth of L. monocytogenes in mixed cultures. To this aim, luminescence kinetics were converted into a single numerical value, called the Luminescence Disturbance Indicator (LDI), which takes into account growth inhibition phenomena resulting in latency increase, decrease in the luminescence rate, or reduction of the maximum luminescence. The LDI allows to automatically and simultaneously handle multiple competition assays which are required for... |
Tipo: Text |
Palavras-chave: Biopreservation; Listeria monocytogenes; High-throughput screening assays; Bioluminescence; Competition; Mixed culture; Bioprotection; Antibacterial activities. |
Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56534/58236.pdf |
| |
|
|
Saraoui, Taous; Cornet, Josiane; Guillouet, Emilie; Pilet, Marie France; Chevalier, Frederique; Joffraud, Jean-jacques; Leroi, Francoise. |
Tropical shrimp is of considerable economic importance in the word but is highly perishable due to microbial and chemical degradation. Biopreservation is a food preservation technology based on the addition of “positive” bacteria able to kill or prevent the growth of undesirable microorganisms. Two strains of lactic acid bacteria (LAB) have previously been selected for a biopreservation strategy: Lactococcus piscium CNCM I-4031, for its ability to prevent the sensory deterioration of seafood and Carnobacterium divergens V41, which inhibits growth of Listeria monocytogenes. The objective was to test the association of the two strains to improve both the quality and safety of shrimp. In a first trial, the two LAB were inoculated alone or in a cocktail in... |
Tipo: Text |
Palavras-chave: Carnobacterium divergens V41; Lactococcus piscium CNCM I-4031; Penaeus vannamei; Listeria monocytogenes; Biopreservation. |
Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00353/46412/46140.pdf |
| |
|
|
Leroi, Francoise; Fall, Papa-abdoulaye; Pilet, Marie-france; Chevalier, Frederique; Baron, Regis. |
The maximum specific growth rate (μmax) of Brochothrix thermosphacta, a spoilage bacteria of cooked peeled shrimp, and Lactococcus piscium CNCM I-4031, a bioprotective strain, was investigated under different conditions of temperature, NaCl concentrations and pH. The basic modelling approach used was the Gamma concept (γ-concept) and the model developed was then adapted to shrimp. Cardinal growth parameters were quite similar for the two strains, except for NaCl. No NaCl was required for growth and the NaClmax was three-times higher for B. thermosphacta than for L. piscium (62 and 23 g l−1 respectively). However, tolerance to NaCl was higher in seafood than in liquid broth, possibly due to presence of osmoltically active molecules. L. piscium and B.... |
Tipo: Text |
Palavras-chave: Modelling; Biopreservation; Shrimp; Lactic acid bacteria; Brochothrix thermosphacta; Spoilage bacteria; Environmental conditions. |
Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00083/19473/17088.pdf |
| |
Registros recuperados: 35 | |
|
|
|