|
|
|
| Registros recuperados: 342 | |
|
| |
|
| |
|
|
| Duperron, Sebastien; Bergin, C; Zielinski, F; Blazejak, A; Pernthaler, A; Mckiness, Z; Dechaine, E; Cavanaugh, C; Dubilier, Nicole. |
| Bathymodiolus azoricus and Bathymodiolus puteoserpentis are symbiont-bearing mussels that dominate hydrothermal vent sites along the northern Mid-Atlantic Ridge (MAR). Both species live in symbiosis with two physiologically and phylogenetically distinct Gammaproteobacteria: a sulfur-oxidizing chemoautotroph and a methane-oxidizer. A detailed analysis of mussels collected from four MAR vent sites (Menez Gwen, Lucky Strike, Rainbow, and Logatchev) using comparative 16S rRNA sequence analysis and fluorescence in situ hybridization (FISH) showed that the two mussel species share highly similar to identical symbiont phylotypes. FISH observations of symbiont distribution and relative abundances showed no obvious differences between the two host species. In... |
| Tipo: Text |
Palavras-chave: Bacteria; Phylogeny; Fluorescence in situ hybridization (FISH); Methane oxidizer; Sulfur oxidizer; 16S rRNA; Endosymbiosis. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1864.pdf |
| |
|
| |
|
| |
|
|
| LIXA,CAROLINA; MUJO,AMANDA; ANOBOM,CRISTIANE D.; PINHEIRO,ANDERSON S.. |
| Bacteria are able to synchronize the population behavior in order to regulate gene expression through a cell-to-cell communication mechanism called quorum sensing. This phenomenon involves the production, detection and the response to extracellular signaling molecules named autoinducers, which directly or indirectly regulate gene expression in a cell density-dependent manner. Quorum sensing may control a wide range of biological processes in bacteria, such as bioluminescence, virulence factor production, biofilm formation and antibiotic resistance. The autoinducers are recognized by specific receptors that can either be membrane-bound histidine kinase receptors, which work by activating cognate cytoplasmic response regulators, or cytoplasmic receptors... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Autoinducer; Bacteria; Quorum sensing; Receptor; Structure. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502189 |
| |
|
|
| Donald, Julian; Roy, Mélanie; Suescun, Uxue; Iribar, Amaia; Manzi, Sophie; Péllissier, Léonie; Gaucher, Philippe; Chave, Jérôme. |
| 1.Community assembly theory assumes that ecological communities are spatially delimited into patches. Within these patches, coexistence results from environmental filtering, competition, and immigration. Truly delineated communities exist in laboratory studies of microbial cultures in Petri dishes, yet empirical tests conducted in continuous environments often use patches defined by convention as opposed to realised boundaries. 2.Here we perform a test of ecological community assembly rules using foliar endophyte communities from a tropical rainforest, where leaves are considered as patches for both fungal and bacterial communities. We determined the diversity of fungal and bacterial endophytes using environmental DNA sequencing of 365 top‐canopy leaves,... |
| Tipo: Text |
Palavras-chave: Bacteria; Distribution; French Guiana; Fungi; Metabarcoding; Plant–pathogen interactions; Rainforest. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71808/70296.pdf |
| |
|
|
| Miravet Regalado, M.E.. |
| Se caracterizó la abundancia, actividad y biodiversidad de las bacterias heterótrofas aeróbias en el Golfo de Batabanó en diferentes épocas del año, desde 1982 hasta el 2000 y su relación con algunos factores abióticos, con el fin de interpretar las variaciones que muestran estos parámetros microbiológicos ante los cambios ambientales de origen natural o antrópico. A escala espacial, las mayores concentraciones de bacterias heterótrofas (BH) en las aguas se registraron hacia la regiónW del golfo y las menores concentraciones hacia el E y el NE, en las aguas de la Ensenada de la Broa, relacionándose principalmente con la disponibilidad de materia orgánica lábil en las aguas y el efecto indirecto de la dirección y sentido principal de las corrientes marinas.... |
| Tipo: Theses and Dissertations |
Palavras-chave: Bacteria; Biodiversity; Bacteria; Biodiversity; Http://aims.fao.org/aos/agrovoc/c_765; Http://aims.fao.org/aos/agrovoc/c_33949. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3398 |
| |
|
|
| Ortiz, E.; Morales, M.; Cartaya, Y.; Miranda, A.; Fonseca, E.; Paneque, K.; Caballero, V.; Martínez, C.; Díaz, Y.. |
| En el presente trabajo se evaluó la actividad biológica de 87 aislamientos de bacterias heterótrofas procedentes de la "Bahía de La Habana". El espectro de potencialidades mostró que el 29,9% de los mismos presentó actividad antimicrobiana frente a las cepas indicadoras empleadas. Un 63,2% presentó actividad caseinasa, el 44,8% mostró su actividad hemolítica y el 83,4% fue capaz de excretar compuestos con actividad superficial. Respecto a los mecanismos degradativos, el 57,5% de ellas, mostró preferencia por el petróleo como fuente de carbono y el 42,5% por los compuestos organoclorados. Se evidenció la amplia gama de actividades con Bioactividad de bacterias heterótrofas aplicación biotecnológica que poseen las bacterias heterótrofas aisladas de éste... |
| Tipo: Preprint |
Palavras-chave: Biological collections; Geographical isolation; Bacteria; Heterotrophic organisms; Bacteria; Http://aims.fao.org/aos/agrovoc/c_765. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/3655 |
| |
|
| |
|
| |
|
|
| Онищенко, О. М.. |
| 51 штамм Alteromonas-подобных бактерий, изолированных из воды и беспозвоночных Черного моря, а также 11 типовых штаммов родов Pseudoalteromonas, Alteromonas, Marinomonas, Shewanella исследованы по 97 фенотипическим признакам и сгруппированы в 8 фенонов методами нумерического анализа. Черноморские изоляты отнесены к видам Pseudoalteromonas nigrifaciens, P. citrea, P. aurantia, P. haloplanktis, P. undina. Спектр их антагонистической активности отличался на различных по составу питательных средах: на богатой среде "В" антагонизм наблюдался в отношении спороносных бактерий и Candida albicans, на синтетической среде "ВМ" - в отношении P. aeruginosa, и в меньшей степени - дрожжей рода Candida. |
| Tipo: Journal Contribution |
Palavras-chave: Bacteria; Bacteria; Http://aims.fao.org/aos/agrovoc/c_765. |
| Ano: 2001 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/561 |
| |
|
|
| Lossouarn, Julien; Dupont, Samuel; Gorlas, Aurore; Mercier, Coraline; Bienvenu, Nadege; Marguet, Evelyne; Forterre, Patrick; Geslin, Claire. |
| Mobile genetic elements (MGEs) such as viruses, plasmids, vesicles, gene transfer agents (GTAs), transposons and transpovirions, which collectively represent the mobilome, interact with cellular organisms from all three domains of life, including those thriving in the most extreme environments. While efforts have been made to better understand deep-sea vent microbial ecology, our knowledge of the mobilome associated with prokaryotes inhabiting deep-sea hydrothermal vents remains limited. Here we focus on the abyssal mobilome by reviewing accumulating data on viruses, plasmids and vesicles associated with thermophilic and hyperthermophilic Bacteria and Archaea present in deep-sea hydrothermal vents. |
| Tipo: Text |
Palavras-chave: Deep-sea hydrothermal vent; Bacteria; Archaea; (Hyper-)thermophiles; Mobilome. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00260/37145/36731.pdf |
| |
|
| |
|
|
| Zheng, Zhou; Jin, Qing; Miao, Jinlai; Liu, Fangming. |
| Two hydrocarbon degrading bacteria NJ276 and NJ341 were screened from 385 Antarctic marine bacteria and their degrading characteristics were studied. Diesel oil as sole carbon source was used in this study. The results showed that the oil degradation rates of Antarctic psychrophile bacteria NJ276 and NJ341 were 23.47 % and 32.15 %, respectively, after 20 days culturation at 5 °C, and the rates were 43.95 % and 62.47 % respectively after 20 days culturation at 15 °C. The oil degradation abilities were enhanced remarkably with the increasing culture temperature. GC - MSs indicated the residual oil contained C15 - C21 7 alkyls after degradation by NJ276, and C16, C17 and C18 3 alkyls after degradation by NJ341. The 16S rDNA gene sequences homology and... |
| Tipo: Journal Contribution |
Palavras-chave: Hydrocarbons; Degradation; Bacteria. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5879 |
| |
|
|
| Canhas, Isabela Nascimento; Heneine, Luiz Guilherme Dias; Fraga, Thaís; Assis, Débora Cristina Sampaio de; Borges, Márcia Helena; Chartone-Souza, Edmar; Nascimento, Andréa Maria Amaral. |
| Toxins and venoms produced by living organisms have exhibited a variety of biological activities against microorganisms. In this study, we tested seven snake venoms from the family Viperidae for antibacterial activity and the activities of reversal of antibiotic resistance and inhibition of biofilm formation against 22 clinical isolates of Staphylococcus aureus. Bothrops moojeni venom exhibited anti staphylococcal activity with the lowest mean value of minimum inhibitory concentration (MIC). Moreover, reversal of antibiotic resistance was observed for combinations of B. moojeni venom (½ x MIC) and norfloxacin or ampicillin (both ½ x MIC) for 86.4% and 50% of the isolates, respectively. B. moojeni venom alone at ½ MIC inhibited 90% of biofilm formation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bothrops moojeni; Bacteria; Antibiotic-resistance; NorA efflux pump; Biofilm.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/33826 |
| |
|
| |
|
| |
|
| |
|
|
| SOBRAL,LAUREANA V.; MELO,KELLY N.; SOUZA,CLECIANA M.; SILVA,SÍLVIO F.; SILVA,GILVANIA L.R.; SILVA,ANDRESSA L.F.; WANDERLEY,KATHARINE A.A.; OLIVEIRA,IDJANE S.; CRUZ,ROBERTA. |
| ABSTRACT To the fungal microbiota the UFPE and biotechnological potential enzymatic and antimicrobial production. Air conditioned environments were sampled using a passive sedimentation technique, the air I ratio and the presence of aflatoxigenic strains evaluated for ANVISA. Icelles were to determine the enzymatic activity of lipase, amylase and protease metabolic liquids to determine antimicrobial activity. Diversity was observed in all CAV environments, CFU/m3 ranged from 14 to 290 and I/E ratio from 0.1 to 1.5. The of the fungal genera were: Aspergillus (50%), Penicillium (21%), Talaromyces (14%), Curvularia and Paecilomyces (7% each). Aspergillus sydowii (Bainier & Sartory) Thom & Church presented enzymatic activity and the Talaromyces... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air quality; Bacteria; Enzymes; Filamentous fungi; Refrigerated environments. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502327 |
| |
| Registros recuperados: 342 | |
|
|
|
