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| Registros recuperados: 341 | |
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| Abbas,Zafar; Akmal,Muhammad; Khan,Khalid Saifullah; Fayyaz-ul-Hassan,. |
| The present study aimed to evaluate the effect of bromoxynil herbicide on soil microorganisms, with the hypothesis that this herbicide caused suppression in microbial activity and biomass by exerting toxic effect on them. Nine sites of Punjab province (Pakistan) those had been exposed to bromoxynil herbicide for about last ten years designated as soil 'A' were surveyed in 2011 and samples were collected and analyzed for Microbial Biomass Carbon (MBC), Biomass Nitrogen (MBN), Biomass Phosphorus (MBP) and bacterial population. Simultaneously, soil samples from the same areas those were not exposed to herbicide designated as soil 'B' were taken. At all the sites MBC, MBN and MBP ranged from 131 to 457, 1.22 to 13.1 and 0.59 to 3.70 µg g-1 in the contaminated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Buctril super; Bacteria; Effect; Population. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100002 |
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| Abdelkarim,Mahdhi; Kamel,Chaieb; Fathi,Kammoun; Amina,Bakhrouf. |
| To evaluate the effect of two bacterial strains isolated from Artemia cysts and yeast (Candida utilis) on the survival, growth and total biomass production of its larvae, challenge tests were performed with Candida utilis, Pseudomonas stutzeri and Pasteurella haemolityca. In addition, a pathogenic strain of Vibrio alginolyticus was tested for comparative purposes. Pseudomonas stutzeri and Candida utilis have no impact on survival, but enhance growth and total biomass production of the larvae. However, we noted that Pasteurella haemolityca affect negatively Artemia larvae. The adhesion and antagonism assay demonstrates that Candida utilis and Pseudomonas stutzeri are fairly adherent and play an important role in the enhancement of the protection of Artemia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemia; Probiotics; Adhesion; Yeast; Bacteria. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100017 |
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| ACEVEDO-GUTIÉRREZ,Leidy Yoana; PATERNINA,Luis Enrique; PÉREZ-PÉREZ,Juan Camilo; LONDOÑO,Andrés Felipe; LÓPEZ,Gustavo; RODAS,Juan David. |
| RESUMEN Las garrapatas son artrópodos de gran impacto sobre la economía pecuaria y la salud humana debido a las pérdidas generadas en la producción, y a su capacidad de transmitir microorganismos. Pese a la evidencia de circulación de una gran diversidad de garrapatas en Colombia, no se cuenta con compilaciones actualizadas de la variedad de especies presentes, por lo cual los autores presentan una revisión de literatura sobre las garrapatas de la familia Ixodidae reportadas en Colombia incluyendo su distribución geográfica, sus hospederos y los microorganismos reportados en aquellas especies registradas en este país. En la recopilación se evidenció la presencia en Colombia de diferentes especies de garrapatas de los géneros Amblyomma, Ixodes,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artrópodos vectores; Artrópodos hematófagos; Bacteria; Distribución espacial; Infestación; Virus. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000100126 |
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| ACOSTA,EDINSON ANDRÉS; GÓMEZ,ELIANA; ROMERO TABAREZ,MAGALLY; CADAVID RESTREPO,GLORIA ESTER; MORENO HERRERA,CLAUDIA XIMENA. |
| El caracol Pala, Strombus gigas (Strombidae), es de gran importancia ecológica y socioeconómica en el área caribeña colombiana. Sin embargo, es una especie catalogada como "vulnerable" y existe muy poca información referente a las especies bacterianas asociadas al caracol que puedan ser importantes para el desarrollo, manejo productivo y de seguridad acuícola de estos gastrópodos. En este trabajo, nosotros empleamos un estudio microbiológico y molecular de la región intergénica entre los genes 16S y 23S rDNA, análisis del gen rDNA 16S y secuenciación, para analizar las bacterias asociadas al caracol Pala (S. gigas). La composición de bacterias cultivables asociadas fue evaluada por su capacidad para crecer en agar marino y en medios de cultivos selectivos.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Strombus gigas; Caracol pala; Bacteria; Región intergénica 16S-23S; RDNA 16S. |
| Ano: 2009 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2009000200007 |
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| Agogue, Helene; Mallet, Clarisse; Orvain, Francis; De Crignis, Margot; Mornet, Francoise; Dupuy, Christine. |
| In intertidal mudflats, during low tide exposure, microphytobenthos (MPB) migrate vertically through the surface sediment and form, with the heterotrophic bacteria, a transient biofilm. Inside this biofilm, multiple interactions exist between MPB and bacteria. These micro-organisms secrete a wide range of extracellular polymeric substances (EPS), which are major components of the biofilm matrix. In this study, we used a tidal mesocosm experiment in order to decipher the interactions of the MPB-EPS-bacteria complex within the biofilm. We tried to determine if the EPS could control bacterial activities and/or production and/or richness according to the age of the biofilm and to the immersion/emersion period. The dynamics of biomasses of MPB and prokaryotes,... |
| Tipo: Text |
Palavras-chave: Muddy sediment; Microphytobenthos; Bacteria; Extracellular polymeric substances; Interactions; Mesocosm. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00181/29271/27682.pdf |
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| Alcarde,André Ricardo; Walder,Júlio Marcos Melges; Horii,Jorge. |
| Bacillus and Lactobacillus are bacteria that usually contaminate the ethanolic fermentation by yeasts and may influence yeast viability. As microorganisms can be killed by ionizing radiation, the efficacy of gamma radiation in reducing the population of certain contaminating bacteria from sugarcane must was examined and, as a consequence, the beneficial effect of lethal doses of radiation on some parameters of yeast-based ethanolic fermentation was verified. Must from sugarcane juice was inoculated with bacteria of the genera Bacillus and Lactobacillus. The contaminated must was irradiated with 2.0, 4.0, 6.0, 8.0 and 10.0 kGy of gamma radiation. After ethanolic fermentation by the yeast (Saccharomyces cerevisiae) the total and volatile acidity produced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Gamma radiation; Yeast. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400011 |
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| Almeida,Hugo; Amaral,Maria Helena; Lobão,Paulo. |
| In recent years, the number of drugs of biotechnological origin available for many different diseases has increased exponentially, including different types of cancer, diabetes mellitus, infectious diseases (e.g. AIDS Virus / HIV) as well as cardiovascular, neurological, respiratory, and autoimmune diseases, among others. The pharmaceutical industry has used different technologies to obtain new and promising active ingredients, as exemplified by the fermentation technique, recombinant DNA technique and the hybridoma technique. The expiry of the patents of the first drugs of biotechnological origin and the consequent emergence of biosimilar products, have posed various questions to health authorities worldwide regarding the definition, framework, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biotechnology; Recombinant DNA; Hybridoma technique; Bacteria; Antibiotics; Vaccines. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000200002 |
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| Amiraux, Rémi; Burot, Christopher; Bonin, Patricia; Massé, Guillaume; Guasco, Sophie; Babin, Marcel; Vaultier, Frédéric; Rontani, Jean-françois. |
| During sea-ice melt in the Arctic, primary production by sympagic (sea-ice) algae can be exported efficiently to the seabed if sinking rates are rapid and activities of associated heterotrophic bacteria are limited. Salinity stress due to melting ice has been suggested to account for such low bacterial activity. We further tested this hypothesis by analyzing samples of sea ice and sinking particles collected from May 18 to June 29, 2016, in western Baffin Bay as part of the Green Edge project. We applied a method not previously used in polar regions—quantitative PCR coupled to the propidium monoazide DNA-binding method—to evaluate the viability of bacteria associated with sympagic and sinking algae. We also measured cis-trans isomerase activity, known to... |
| Tipo: Text |
Palavras-chave: Bacteria; Sea ice; Sympagic algae; Ice biota; Viability; Stress factors; Salinity; Bactericidal free fatty acids; Carbon export. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00681/79329/81840.pdf |
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| Andrade,Milene Aparecida; Cardoso,Maria das Graças; Gomes,Marcos de Souza; Azeredo,Camila Maria Oliveira de; Batista,Luís Roberto; Soares,Maurilio José; Rodrigues,Leonardo Milani Avelar; Figueiredo,Ana Cristina S.. |
| This study had analyzed the antibacterial, antifungal and trypanocidal activity of the essential oils from Cinnamodendron dinisii Schwacke (Canellaceae) and Siparuna guianensis Aublet (Siparunaceae). The essential oils were obtained from fresh leaves by hydrodistillation, using a modified Clevenger apparatus. Chemical analysis by gas-liquid chromatography coupled to mass spectrometry (GC-MS) showed that these essential oils are rich in monoterpene and sesquiterpene hydrocarbons. Activity against the pathogenic bacteria Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella choleraesuis and Staphylococcus aureus was evaluated with the agar cavity diffusion method, while activity on the filamentous fungi Aspergillus flavus, Aspergillus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Volatile oils; Fungi; Bacteria; Trypanosoma cruzi. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100189 |
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| Aquino,S.; Lui,C.C.; Corrêa,B.. |
| ABSTRACT The quality of products derived from eggs depends on the quality of the raw material source and the industrial production. The contamination by fungi and bacteria can occur after exposure of the product in the retail market. The objective of this study was to evaluate the microbiological quality of 60 samples of derivated egg products and evaluate the effects of gamma radiation of cobalt-60, using the dose of 5 and 10 kGy, for decontamination of products collected in the retail market in the São Paulo city. The bacterial count was performed by the most probable number (MPN) and the fungal counts by serial dilution after plating surface. It was observed a decrease in the humidity and water activity (Aw) values of irradiated whole egg powder and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Sterilization; Fungi; Irradiation; Powdered egg. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000601683 |
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| Baccaro,Maria Regina; Moreno,Andrea Micke; Shinya,Luciane Tieko; Dotto,Daniela Sabatini. |
| In Brazil, the most common bacterial enteric diseases affecting growing and finishing pigs are porcine proliferative enteritis, porcine intestinal spirochetosis, swine dysentery, and salmonellosis. The diagnosis of these diseases by routine culture techniques is expensive, difficult, time-consuming, and even impossible, in cases of porcine proliferative enteritis. The detection of pathogens by polymerase chain reaction is a highly sensitive and specific method that can be an useful tool in veterinary diagnosis. Two multiplex PCR (M-PCR) assays were tested for simultaneous detection and identification of bacterial agents associated with porcine proliferative enteritis, porcine intestinal spirochetosis, swine dysentery, and salmonellosis in diarrheic fecal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Enteritis; PCR; Pig; Bacteria; Diagnosis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000300008 |
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| Barreiro,Juliana R.; Gonçalves,Juliano L.; Grenfell,Rafaella; Leite,Renata F.; Juliano,Luiz; Santos,Marcos V.. |
| ABSTRACT The present study aimed to compare two MALDI-TOF identification methods [(a) direct sample identification after pre-incubation; or (b) use of bacteria isolated on pre-culture)] to standard, traditional bench microbiology. A total of 120 quarter milk samples from 40 Holstein lactating cows were screened based on culture-positive results obtained by microbiological culture (reference method) with the following numbers of quarters positive per cow: 4 cows with 1, 8 cows with 2, 12 cows with 3 and 16 cows with 4 infected quarters per cow. For direct identification method, quarter milk samples (n = 120) were skimmed by centrifugation (10,000 × g/10 min) and pre-incubated at 37 ºC for 12 h. After pre-incubation, quarter milk samples were submitted to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milk; Bacteria; Mastitis; Mass spectrometry. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400801 |
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| Barrera, Y.; Real, E.; Ortega, O.. |
| El objetivo de este trabajo fue definir la tecnología para elaborar una leche fermentada de búfala con buena aceptación y adecuada viabilidad. Se estableció el efecto del cultivo asociado de bacterias probióticas de Lactobacillus acidophilus + Lactobacillus casei, sobre la capacidad de acidificación, firmeza y características sensoriales de una leche fermentada de limón con una proporción de 1,5 % de cada cultivo. Se tomó como control el yogurt de búfala elaborado con 3 % del cultivo tradicional. Fue determinada la capacidad acidificante del cultivo mixto en la leche, la composición físico-química del producto, viabilidad, calidad microbiológica, así como su durabilidad a 4 ± 2 °C. En cuanto a la capacidad acidificante del cultivo mixto no fueron... |
| Tipo: Journal Contribution |
Palavras-chave: Bacteria; Technology; Shelf life; Fermented milk; Lactobacillus casei; Lactobacillus acidophilus. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4844 |
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| Battersby, N; Stewart, D; Sharma, A. |
| Chemical additives are used extensively in the offshore oil industry. For secondary oil recovery, the biopolymer xanthan has been recommended as a viscosifying agent but its use may provoke microbial problems. The effect of adding xanthan to marine sediments on the growth and metabolic activity of sulphate-reducing bacteria (SRB) was studied. In all instances, its addition resulted in an increasing in SRB numbers of up to 250-fold. This was accompanied by a marked increase in the electron transport activity of the sediments when these were incubated under either aerobic or anaerobic conditions. The products formed as a result of the biodegradation of the polymer by indigenous heterotrophic bacteria in these sediments appear to have acted as suitable... |
| Tipo: Text |
Palavras-chave: Bacteria; Growth; Additives; Pollution effects; Oil recovery; Biodegradation; Polymers; Sediment pollution; Sulfate reduction. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1015.pdf |
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| Becker-Ritt,Arlete Beatriz; Portugal,Camila Saretta; Carlini,Célia Regina. |
| Abstract Urease from Canavalia ensiformis seeds was the first enzyme ever to be crystallized, in 1926. These proteins, found in plants, bacteria and fungi, present different biological properties including catalytic hydrolysis of urea, and also enzyme-independent activities, such as induction of exocytosis, pro-inflammatory effects, neurotoxicity, antifungal and insecticidal properties. Urease is toxic to insects and fungi per se but part of this toxicity relies on an internal peptide (~11 kDa), which is released upon digestion of the protein by insect enzymes. A recombinant form of this peptide, called jaburetox (JBTX), was constructed using jburell gene as a template. The peptide exhibits liposome disruption properties, and insecticidal and fungicidal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Peptide; Bacteria; Membranes; Nanoparticles. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100211 |
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| Registros recuperados: 341 | |
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