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| Registros recuperados: 24 | |
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| Roussel, Erwan; Konn, Cecile; Charlou, Jean-luc; Donval, Jean-pierre; Fouquet, Yves; Querellou, Joel; Prieur, Daniel; Cambon-bonavita, Marie-anne. |
| The distribution of Archaea and methanogenic, methanotrophic and sulfate-reducing communities in three Atlantic ultramafic-hosted hydrothermal systems (Rainbow, Ashadze, Lost City) was compared using 16S rRNA gene and functional gene (mcrA, pmoA and dsrA) clone libraries. The overall archaeal community was diverse and heterogeneously distributed between the hydrothermal sites and the types of samples analyzed (seawater, hydrothermal fluid, chimney and sediment). The Lost City hydrothermal field, characterized by high alkaline warm fluids (pH>11; T<95 °C), harbored a singular archaeal diversity mostly composed of unaffiliated Methanosarcinales. The archaeal communities associated with the recently discovered Ashadze 1 site, one of the deepest active... |
| Tipo: Text |
Palavras-chave: Archaea; Hydrothermal vent; Mid-Atlantic Ridge; 16S rRNA gene; Sediment; Ultramafic. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00067/17836/15573.pdf |
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| Postec, Anne; Lesongeur, Francoise; Pignet, Patricia; Ollivier, B; Querellou, Joel; Godfroy, Anne. |
| The prokaryotic diversity of culturable thermophilic communities of deep-sea hydrothermal chimneys was analysed using a continuous enrichment culture performed in a gas-lift bioreactor, and compared to classical batch enrichment cultures in vials. Cultures were conducted at 60 degrees C and pH 6.5 using a complex medium containing carbohydrates, peptides and sulphur, and inoculated with a sample of a hydrothermal black chimney collected at the Rainbow field, Mid-Atlantic Ridge, at 2,275 m depth. To assess the relevance of both culture methods, bacterial and archaeal diversity was studied using cloning and sequencing, DGGE, and whole-cell hybridisation of 16S rRNA genes. Sequences of heterotrophic microorganisms belonging to the genera Marinitoga,... |
| Tipo: Text |
Palavras-chave: Metabolic interactions; 16S rRNA gene; Thermophiles; Bioreactor; Continuous enrichment cultures; Deep sea hydrothermal vent; Microbial diversity. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3885.pdf |
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| Silbande, Adele; Adenet, Sandra; Chopin, Christine; Cornet, Josiane; Smith-ravin, Juliette; Rochefort, Katia; Leroi, Francoise. |
| Aims The effect of vacuum (VP – 4 °C) and CO2/N2–atmosphere (MAP – 4 °C) packaging on the quality of red drum fillets compared with whole gutted iced fish was investigated. Methods and results A metagenomic approach, bacterial enumeration and isolation, biochemical and sensory analyses were carried out. The organoleptic rejection of whole fish was observed at day 15 whereas VP and MAP fillets appeared unacceptable only after 29 days. At these dates, total mesophilic counts reached 107–108 CFU g− 1. According to Illumina MiSeq sequencing, Arthrobacter, Chryseobacterium, Brevibacterium, Staphylococcus and Kocuria were the main genera of the fresh red drum fillets. At the sensory rejection time, lactic acid bacteria (LAB), particularly Carnobacterium sp.,... |
| Tipo: Text |
Palavras-chave: Seafood; Biogenic amine; VP; MAP; NGS; 16S rRNA gene. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00407/51858/52468.pdf |
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| Trigodet, Florian; Larché, Nicolas; Morrison, Hilary G.; Maignien, Lois; Thierry, Dominique. |
| The ennoblement of stainless steel (e.g., the increase of open circuit potential [OCP]) is associated with bacterial colonization. This increases the risk of localized corrosion as the critical pitting/crevice potential can be overcome, especially for lower grade stainless steel. In this study, we assessed the influence of dissolved oxygen content (DOC) on the crevice corrosion of duplex and super duplex stainless steels. In addition, we used DNA amplicon sequencing to identify the bacteria most likely associated with the ennoblement. Above approximately 100 parts per billion (ppb) of dissolved oxygen, the ennoblement of OCP was observed leading to an increased risk of localized corrosion. Below approximately 100 ppb of dissolved oxygen, no ennoblement... |
| Tipo: Text |
Palavras-chave: 16S rRNA gene; Electroactive bacteria; Ennoblement; Microbial ecology; Natural seawater; Stainless steel. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00588/70026/67934.pdf |
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| MISHRA,PANKAJ K; MISHRA,SMITA; BISHT,SHEKHAR C; SELVAKUMAR,G; KUNDU,S; BISHT,J. K; GUPTA,HARI SHANKAR. |
| A bacterium that grows and expresses plant growth promotion traits at 4°C was isolated from the rhizospheric soil of Amaranth, cultivated at a high altitude location in the North Western Indian Himalayas. The isolate was Gram negative and the cells appeared as rods (2.91 x 0.71 μm in size). It grew at temperatures ranging from 4 to 30°C, with a growth optimum at 28°C. It exhibited tolerance to a wide pH range (5-10; optimum 8.0) and salt concentrations up to 6% (wt/vol). Although it was sensitive to Rifampicin (R 20 μg mi-1), Gentamicin (G 3 μg mi-1), and Streptomycin (S 5 μg mi-1), it showed resistance to higher concentrations of Ampicillin (A 500 μg mi-1), Penicillin (P 300 μg mi-1), Polymixin B... |
| Tipo: Journal article |
Palavras-chave: Cold tolerant; Pseudomonas lurida; 16S rRNA gene; Nutrient uptake; Plant growth promotion. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000300005 |
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| Cabezas, Patricia; Macpherson, Enrique; Machordom, Annie. |
| The family Galatheidae is among the most diverse families of anomuran decapod crustaceans, and the South-West Pacific is a biodiversity hot spot for these squat lobsters. Attempts to clarify the taxonomic and evolutionary relationships of the Galatheidae on the basis of morphological and molecular data have revealed the existence of several cryptic species, differentiated only by subtle morphological characters. Despite these efforts, however, relationships among genera are poorly understood, and the family is in need of a detailed systematic review. In this study, we assess material collected in different surveys conducted in the Solomon Islands, as well as comparative material from the Fiji Islands, by examining both the morphology of the specimens and... |
| Tipo: Text |
Palavras-chave: 16S rRNA gene; COI gene; Decapoda; Molecular systematics; Morphology. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00205/31675/30058.pdf |
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| Díaz,C.; Baena,S.; Patel,B.K.C.; Fardeau,M.L.. |
| We studied the peptide-degrading anaerobic communities of methanogenic reactors from two mesophilic full-scale modified upflow anaerobic sludge blanket (UASB) reactors treating brewery wastewater in Colombia. Most probable number (MPN) counts varied between 7.1 x 10(8) and 6.6 x 10(9) bacteria/g volatile suspended solids VSS (Methanogenic Reactor 1) and 7.2 x 10(6) and 6.4 x 10(7) bacteria/g (VSS) (Methanogenic Reactor 2). Metabolites detected in the highest positive MPN dilutions in both reactors were mostly acetate, propionate, isovalerate and, in some cases, negligible concentrations of butyrate. Using the highest positive dilutions of MPN counts, 50 dominant strains were isolated from both reactors, and 12 strains were selected for sequencing their 16S... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anaerobic peptide-degrading bacteria; MPN; UASB; 16S rRNA gene. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300022 |
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| Mieszkin, Sophie; Yala, Jean Fabrice; Joubrel, Rozenn; Gourmelon, Michele. |
| Aims: The aims of this study were to evaluate the host-specific distribution of Bacteroidales 16S rRNA gene sequences from human- and animal-related effluents and faeces, and to define a ruminant-specific marker. Methods and Results: Bacteroidales 16S rRNA gene clone libraries were constructed from samples of effluent (sewage, bovine manure and pig slurry) and faeces (human, bovine, pig and wild bird), using PCR primers targeting order Bacteroidales. The phylogenetic analysis revealed six main distinct human-, bovine-, pig- and wild bird-specific clusters. From the bovine-specific cluster II, we designed a ruminant-specific marker, Rum-2-Bac, and this showed 97% sensitivity (n = 30) and 100% specificity (n = 40) when tested by TaqMan (R) real-time PCR.... |
| Tipo: Text |
Palavras-chave: 16S rRNA gene; Bacteroidales; Faecal contamination; Microbial Source Tracking; Sewage and manure. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00000/11156/8235.pdf |
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| Zhou,JunPei; Huang,Ying; Mo,MingHe. |
| Phylogenetic composition of bacterial community in soil of a karst forest was analyzed by culture-independent molecular approach. The bacterial 16S rRNA gene was amplified directly from soil DNA and cloned to generate a library. After screening the clone library by RFLP, 16S rRNA genes of representative clones were sequenced and the bacterial community was analyzed phylogenetically. The 16S rRNA gene inserts of 190 clones randomly selected were analyzed by RFLP and generated 126 different RFLP types. After sequencing, 126 non-chimeric sequences were obtained, generating 113 phylotypes. Phylogenetic analysis revealed that the bacteria distributed in soil of the karst forest included the members assigning into Proteobacteria, Acidobacteria, Planctomycetes,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Karst forest; Bacteria; 16S rRNA gene. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400013 |
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| Dauchy Silbande, Adele; Adenet, Sandra; Smith-ravin, Juliette; Joffraud, Jean-jacques; Rochefort, Katia; Leroi, Francoise. |
| Metagenomic, microbial, chemical and sensory analyses of Thunnus albacares from Martinique and stored in ice (AIR – 0 °C), vacuum (VP – 4/8 °C) and modified atmosphere packaging (MAP – 4/8 °C) (70% CO2 – 30% O2) were carried out. The organoleptic rejection of AIR tuna was observed at day 13 when total bacterial counts equaled 106–107 CFU g−1. No extension of shelf-life was provided by VP and MAP. According to 16S rRNA gene sequence analyzed by Illumina MiSeq and PCR-TTGE, Rhodanobacter terrae was the main species of the freshly caught tuna. At the sensory rejection time, Brochothrix thermosphacta and Pseudomonas dominated the AIR products while B. thermosphacta alone or a mix of B. thermosphacta, Enterobacteriaceae and lactic acid bacteria (LAB) dominated... |
| Tipo: Text |
Palavras-chave: Seafood; Fish; Microbiology; Sensory; NGS; 16S rRNA gene. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00344/45504/45056.pdf |
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| Wiernasz, Norman; Leroi, Francoise; Chevalier, Frederique; Cornet, Josiane; Cardinal, Mireille; Rohloff, Jens; Passerini, Delphine; Skırnisdóttir, Sigurlaug; Pilet, Marie-france. |
| Seafood and fishery products are very perishable commodities with short shelf-lives owing to rapid deterioration of their organoleptic and microbiological quality. Microbial growth and activity are responsible for up to 25% of food losses in the fishery industry. In this context and to meet consumer demand for minimally processed food, developing mild preservation technologies such as biopreservation represents a major challenge. In this work, we studied the use of six lactic acid bacteria (LAB), previously selected for their properties as bioprotective agents, for salmon dill gravlax biopreservation. Naturally contaminated salmon dill gravlax slices, with a commercial shelf-life of 21 days, were purchased from a French industrial company and inoculated by... |
| Tipo: Text |
Palavras-chave: Metabarcoding; 16S rRNA gene; Seafood; Antilisterial activity; Volatile organic compounds; Sensory analyses. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00605/71716/70174.pdf |
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| Registros recuperados: 24 | |
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