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| Registros recuperados: 24 | |
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| Matamoros, Sébastien; Pilet, Marie-france; Gigout, Frédérique; Prevost, Hervé; Leroi, Françoise. |
| In this study, 51 seafood products were screened to select psychrophilic inhibiting lactic acid bacteria. 5575 colonies were tested for inhibition against four target strains : Listeria monocytogenes, Staphylococcus xylosus, Pseudomonas sp. and Serratia liquefaciens. 456 colonies (8,2%) showed inhibition and 132 (28,9%) of them were picked up. 54 isolates growing at 15°C but not at 30°C were selected. Basic phenotypic characteristics (Gram, catalase and oxidase test) were then tested. Finally, 52 presumptive psychrophilic LAB strains were selected. The inhibition spectrum of these strains was enlarged to 14 spoiling or pathogenic target strains relevant for seafood products. The inhibition profiles were recorded, and clustering was made to separate eight... |
| Tipo: Text |
Palavras-chave: Biopreservation; Seafood products; Psychrophilic lactic acid bacteria; Inhibition. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00002/11339/7888.pdf |
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| Labry, Claire; Urvoy, Marion. |
| Alkaline phosphatases are the main enzymes required by microorganisms to hydrolyse organic phosphorus into available phosphate in aquatic environments. The investigations of alkaline phosphatase activity (APA) usually generate numerous samples (size fractionation, Michaelis-Menten kinetics). Therefore, convenient and reliable preservation of incubated samples for a deferred analysis would be very useful when measurements cannot be performed right away. The APA of marine pond waters was measured using 4-Methylumbelliferyl phosphate (MUF-P) as the fluorogenic substrate modelling natural organic phosphorus compounds. Where typical inhibitors of other enzymatic activities, such as 1% sodium dodecyl sulfate, mercuric chloride, or buffered solutions of ammonium... |
| Tipo: Text |
Palavras-chave: Alkaline phosphatase activity; Formaldehyde; Inhibition; Enzymes; Aquatic studies; Deferred measurements. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00656/76787/78211.pdf |
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| Ahmed,M; Latif,N; Khan,RA; Ahmad,A; Rocha,JBT; Mazzanti,CM; Bagatini,MD; Morsch,VM; Schetinger,MRC. |
| This study analyses venom from the elapid krait snake Bungarus sindanus, which contains a high level of acetylcholinesterase (AChE) activity. The enzyme showed optimum activity at alkaline pH (8.5) and 45ºC. Krait venom AChE was inhibited by substrate. Inhibition was significantly reduced by using a high ionic strength buffer; low ionic strength buffer (10 mM PO4 pH 7.5) inhibited the enzyme by 1. 5mM AcSCh, while high ionic strength buffer (62 mM PO4 pH 7.5) inhibited it by 1 mM AcSCh. Venom acetylcholinesterase was also found to be thermally stable at 45ºC; it only lost 5% of its activity after incubation at 45ºC for 40 minutes. The Michaelis-Menten constant (Km) for acetylthiocholine iodide hydrolysis was found to be 0.068 mM. Krait venom... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acetylcholinesterase; Inhibition; Krait; Ionic strength; Acetylthiocholine iodide; Bungarus sindanus; Snake venom. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000200014 |
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| Mejías, E.; Delgado, R.; Silveira, I.; Lafargue, D.; Cárdenas, E.. |
| Se evaluó el efecto de diferentes especias o condimentos sobre la calidad microbiológica del tempeh y la posible acción inhibidora de sus contaminantes. El tempeh se obtuvo a partir de frijol de soya el cual se sometió a los procesos de cocción, escurrimiento y fermentación. A continuación se procedió a incorporar los condimentos ensayados en dos proporciones por separado a la soya fresca antes de su inoculación con la cepa R. oligosporus, se mezclaron bien y se sometieron al proceso de fermentación, el cual tuvo lugar en bandejas de poliestireno, incubadas a 30 ± 2 ºC por un período de 18 a 20 h hasta obtener un producto con las características típicas del tempeh. De éste se tomaron muestras para determinar contenido de humedad, conteo total de viables y... |
| Tipo: Journal Contribution |
Palavras-chave: Biological contamination; Chemical activity; Tempeh; Bacterial contamination; Enterobacteriaceae; Inhibition; Garlic; Anions; Spices. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5010 |
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| XIMENEZ,G.R.; SANTIN,S.M.O.; IGNOATO,M.C.; SOUZA,L.A.; PASTORINI,L.H.. |
| ABSTRACT: Allelopathy is the term used to define any process involving secondary metabolites produced by plants and microorganisms that influence growth and development of agrobiological systems. Currently, it is sought to find allelochemicals of interest and know how to apply them in bio-herbicides to combat weeds. In this study, the effects of the crude leaf extract and fractions of Machaerium hirtum (Vell.) Stellfeld were analyzed on Euphorbia heterophylla L. (wild poinsettia) and Ipomoea grandifolia (Dammer) O’Donell (morning glory), as well as the occurrence of morphoanatomical changes. For this, 0.04 g of the crude extract and fractions were solubilized and diluted (50 mL) to concentrations of 0.1, 0.2, 0.4, and 0.8 g L-1 (m/v). Initial growth tests... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Inhibition; Allelopathy; Morphoanatomy; Weeds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100215 |
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| Khaliq,A; Matloob,A; Khan,M.B; Tanveer,A. |
| Herbicidal potential of different plant aqueous extracts was evaluated against early seedling growth of rice weeds in pot studies. Plant aqueous extracts of sorghum (Sorghum bicolor), sunflower (Helianthus annuus), brassica (Brassica compestris), mulberry (Morris alba), eucalyptus (Eucalyptus camaldunensis), and winter cherry (Withania somnifera) at a spray volume of 18 L ha-1 each at the 2-4 leaf stage of rice weeds viz horse purslane (Trianthema portulacastrum) [broad-leaf], jungle rice (Echinochloa colona), and E. crus-galli (barnyard grass) [grasses] and purple nut sedge (Cyperus rotundus) and rice flat sedge (C. iria) [sedges]. The results showed significant interactive effects between plant aqueous extracts and the tested weed species for seedling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Aqueous extracts; Seedling growth; Weeds; Inhibition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000100003 |
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| CARRARO-LEMES,C.F.; SCHEFFER-BASSO,S.M.; DEUNER,C.C.; BERGHAHN,S.C.T.. |
| ABSTRACT: The recognized allelopathic activity of oats as a soil-cover plant induces the study of the potential of their germplasm. The objective of this study is to verify if there is genotype variability in the Avena spp. with regard to allelopathic activity. Extracts of A. strigosa ‘Agro Quaraí’, ‘Agro Esteio’, ‘Embrapa139’, ‘AF 12104’, ‘AF 12109’, ‘AF 12202’, ‘AF 12209’, A. sativa ‘UPFPS Farroupilha’ and ‘AF 1345 Ucraniana,’ were prepared in three concentrations w/v (5 g, 10 g, and 20 g of dry mass 100 mL-1). The experiment was conducted in a germination chamber for 15 days, with lettuce (Lactuca sativa L.) as the recipient plant. There was complete inhibition of germination under 20% w/v extracts and partial inhibition at 10% w/v. Only 5% w/v observed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa L.; Avena strigosa Schreb; Weed; Germination; Inhibition. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100297 |
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| Yamashita, O. M.; Kobayashi, L.; Cassetari Neto, D.; Santi, A.; Peres, W. M.; Carvalho, M. A. C.; Kappes, C.. |
| Leaf spot is a disease provoked by the fungus Bipolaris maydis, that it causes great damages for annual crops, as the corn, the wheat and the oats. Tests "in vitro" were accomplished seeking to evaluate the efficiency in the inhibition of the mycelial growth of that patogenic fungus through five fungicides: tetraconazol, tebuconazole, azoxystrobin + cyproconazole, trifloxystrobin + ropiconazole and trifloxystrobin + cyproconazole were ested fungicides. For the determination of the efficiency f the products, the daily growth of the fungus was valuated, being compared with the control. It was determined the percentage of growth inhibition. All of the treatments were effective in the inhibition of the growthof this fungus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungus; Inhibition; Disease; Chemical control. |
| Ano: 2010 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/4270 |
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| CESA-LUNA,Catherine; BAEZ,Antonino; QUINTERO-HERNÁNDEZ,Verónica; CRUZ-ENRÍQUEZ,Joel DE LA; CASTAÑEDA-ANTONIO,Ma Dolores; MUÑOZ-ROJAS,Jesús. |
| ABSTRACT Bacteria produce antimicrobial compounds to compete for nutrients and space in a particular habitat. Antagonistic interactions can be evaluated by several methodologies including the double-layer agar and simultaneous inhibition assays. Among the well-known inhibitory substances produced by bacteria are the broad-spectrum antibiotics, organic acids, siderophores, antifungal, and bacteriocins. The most studied bacterial genera able to produce these inhibitory substances are Enterococcus, Lactococcus, Streptomyces, Bacillus, Pseudomonas, Klebsiella, Escherichia, and Burkholderia. Some beneficial bacteria can promote plant growth and degrade toxic compounds in the environment representing an attractive solution to diverse issues in agriculture and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antagonism; Antibiotic; Competition; Inhibition; PGPR. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000100140 |
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| Registros recuperados: 24 | |
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