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| Registros recuperados: 95 | |
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| Reyes-Contreras,Carolina; Vidal,Gladys. |
| Background Anaerobic digestion is a technology applied successfully to converting organic matter into biogas. However, the presence of inhibitory compounds such as antibiotics can adversely affect methane production. The aim of this study is to evaluate the toxic effect of chlortetracycline hydrochloride (CLOR) on the methanogenic bacteria. In order to study the methanogenic toxicity of CLOR, different concentrations of CLOR (10, 50, 100, 200 mg L- 1) were evaluated by methanogenic toxicity assays using three feedings. Results Maximum methane production was obtained for the assays with 10 mg CLOR L- 1, the values obtained were 277 ± 4.07; 193 ± 11.31 and 166 ± 7.07 mL for the first, second and third feedings, respectively. The average values for acetic,... |
| Tipo: Journal article |
Palavras-chave: Antibiotics; Anaerobic batch assay; Bacterial inhibition; Volatile fatty acids. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600010 |
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| PEDRO, E. dos S.; GONÇALVES, R. M.; FIGUEIREDO, J. E. F.; MEIRELLES, W. F.; COSTA, R. V.; COTA, L. V.; SILVA, D. D. da; PACCOLA-MEIRELLES, L. D.. |
| A mancha-de-Phaeosphaeria (MF), também conhecida como mancha-branca-do-milho (MBM ), é uma das principais doenças foliares do milho no Brasil. Ela apresenta ampla distribuição nas áreas de produção de milho e pode causar perdas de produtividade de até 60%. Apesar da importância da doença, sua etiologia continua um assunto de controvérsia e debate. Diferentes espécies de fungos: Phaeosphaeria maydis, Phoma sorghina e Sporormiella sp., e a bactéria Pantoea ananatis foram relatados como agentes causadores da doença MF/MBM. No presente trabalho, são estudados o efeito inibitório do antibiótico Mycoshield (oxitetraciclina 17%) sobre o crescimento de P. ananatis in vitro e a sua eficácia no controle da doença MF/MBM no campo. Plantas de dois híbridos de milho... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Erwinia ananas; Oxitetraciclina; Doença de planta; Zea mays; Antibiótico; Controle químico; Etiologia; Chemical control; Plant diseases and disorders; Antibiotics. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/979799 |
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| Jacq, E; Moal, Jeanne; Samain, Jean-francois; Corre, S; Daniel, J; Nicolas, Jean-louis; Cochard, Jean-claude; Fera, P. |
| Larval rearings were performed with seawater either freshly pumped or after storage in a pond. Concerning bacterial populations these waters were characterized by a high diversity, little sized bacteria whose few of them (1%) were cultivable on Zobell medium. In the tanks, the bacterial ecosystem was modified by the presence of antibiotics, larvae and algae: the diversity was lowered, the cellular volume was increased by a factor 2 to 5, 100% bacteria were cultivable and chloramphenicol resistant, and their metabolism changed. Taxonomic screening showed no differences among the two waters neither at the beginning nor at the end of the rearings. However, depending on the water (stored or not) differences were identified for bacterial physiology and... |
| Tipo: Text |
Palavras-chave: Marine aquaculture; Pond culture; Scallop culture; Ecology; Antibiotics; Organic matter; Grazing; Carbohydrates; Mathematical models; Modelling; Growth; Bacterial diseases; Biological production; Culture tanks; Larvae; Rearing. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-914.pdf |
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| Bruno, Renato; Maresca, Marc; Canaan, Stéphane; Cavalier, Jean-françois; Mabrouk, Kamel; Boidin-wichlacz, Céline; Olleik, Hamza; Zeppilli, Daniela; Brodin, Priscille; Massol, François; Jollivet, Didier; Jung, Sasha; Tasiemski, Aurélie. |
| Antimicrobial peptides (AMPs) are natural antibiotics produced by all living organisms. In metazoans, they act as host defense factors by eliminating microbial pathogens. But they also help to select the colonizing bacterial symbionts while coping with specific environmental challenges. Although many AMPs share common structural characteristics, for example having an overall size between 10–100 amino acids, a net positive charge, a γ-core motif, or a high content of cysteines, they greatly differ in coding sequences as a consequence of multiple parallel evolution in the face of pathogens. The majority of AMPs is specific of certain taxa or even typifying species. This is especially the case of annelids (ringed worms). Even in regions with extreme... |
| Tipo: Text |
Palavras-chave: Antibiotics; Annelids; Nematodes; AMP; Extremophiles. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00511/62307/66556.pdf |
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| Awobajo,F. O; Raji,Y; Akinloye,A. K. |
| Studies on testes and epididymis tissue of rats treated orally for fourteen days with therapeutic doses of cloxacillin (6mg/100g/day), ampicillin (4mg/100/day) and tetracycline (12mg/100g/day) separately showed a significant reduction in testicular and epididimis architecture. Microscopic studies of these male reproductive organs further revealed a significant alteration in the epididymis as revealed by a significant reduction (p<0.05) in epididymal ductular diameter (EDD), and epididymal epithelial height (EEH) in treated group of animals. A significant increase (p<0.05) was however recorded in epididymal luminal diameter (ELD) in all the animals after the two and three week's recovery period allowed. This gives another insight into the toxicity... |
| Tipo: Journal article |
Palavras-chave: Antibiotics; Testes; Epididymis; Histomorphometry. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400047 |
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| Hindili, R.; Ben Said, O.; Alatrache, A.; Tajouri, T.; Aissa, P.. |
| De nos jours, l’utilisation immodérée et massive des antibiotiques a conduit à l’accroissement du phénomène de l’antibiorésistance pouvant induire la réapparition des épidémies incurables. Dans ce cadre apparait la photocatalyse hétérogène comme une technologie alternative pour dépolluer les eaux contaminées par de telles molécules. Pour cela on a étudié la dégradation photocatalytique de la spiramycine, antibiotique fréquemment utilisé dans la médecine vétérinaire. Nous avons évalué par la suite son activité antibactérienne au cours de sa photocatalyse qui a révélé une perte de toute activité antibactérienne au bout de 45 minutes vis-à-vis Staphylococcus xylosus. Enfin, nous avons testé l’impact de ce processus sur la biomasse bactérienne du même germe... |
| Tipo: Journal Contribution |
Palavras-chave: Antibiotics. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5899 |
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| Registros recuperados: 95 | |
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