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| Registros recuperados: 56 | |
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| Abi Nassif, L.; Rioual, S.; Farah, W.; Hellio, C.; Fauchon, M.; Trepos, R; Abboud, M.; Diler, E.; Thierry, D.; Lescop, B.. |
| The effect of biofilm formation on passive stainless steel in seawater environments is of primary importance since it leads to potential ennoblement of surfaces and subsequently to localized corrosion such as pitting and crevice corrosion. This study aims at developing an ecofriendly alginate biopolymer containing both non-toxic calcium and a limited amount of biocidal zinc ions which inhibits this effect. For this purpose, calcium alginate containing less than 1 % of zinc ions localized in the vicinity of the steel surface in natural and renewed seawater is demonstrated to reduce significantly the ennoblement process of steel. After 1 month of immersion, a mass loss of only 4 % of the active material is observed authorizing thereby long-term protection of... |
| Tipo: Text |
Palavras-chave: Biopolymer; Steel; Ennoblement; Antimicrobial; Alginate; Biofilm. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00604/71607/73083.pdf |
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| Amorim,Rodrigo das Neves dos Santos; Rodrigues,José Ariévilo Gurgel; Holanda,Márjory Lima; Quinderé,Ana Luíza Gomes; Paula,Regina Célia Monteiro de; Melo,Vânia Maria Maciel; Benevides,Norma Maria Barros. |
| The aim of this study was to determine the yield, chemical composition, specific rotation (SR), infrared (IR) spectroscopy and the effect on bacterial growth of a crude sulfated polysaccharide (SP) from the red marine alga G. ornata (Go). Go-1 (25°C), Go-2 (80°C), and Go-3 (80°C) were sequentially extracted and yielded 9.2%. The contents of sulfate (5.88-10.3%) and proteins (0.1-3.7%) were small. The values of SR were [µ]D20°f -19.0, -51.0, and -56.5, respectively. IR spectrums showed the presence of galactose-4 sulfate and absence of 3,6-anydrogalactose-2 sulfate, galactose-6 sulfate and galactose-2 sulfate. SR and IR techniques confirmed SPs. Go-3 was tested on the growth of bacteria (Bacillus subtilis, Staphylococcus aureus, Enterobacter aerogens,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodophyta; Sulfated macromolecules; Chemical analysis; Antimicrobial. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200001 |
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| Andrade,J.R.A.; Silva,N.; Silveira,W.; Teixeira,M.C.C.. |
| An epidemiological study was carried out on 2823 cows from 34 dairy herds from Goiania in the State of Goias-Brazil during 2001 to 2002. The pregnancy rate was 47.8%. In 1473 non-pregnant cows, causes of reproductive failure problems were sought. The most prevalent uterine infection was endometritis (17.0%). Uterine disorders such as partial hypoplasia of the genital system (0.04%), macerate fetus (0.01%), adhesion of ovaries (0.04%), stillbirth (0.04%), retained placenta (0.01%), cervix inflammation (0.6%) and abortion (0.88%) also were found. Uterine swabs were collected aseptically for microbiological culture. Gram positives cocci (41.3%) and Gram negatives rods (52.6%) were found, and Staphylococcus aureus and Escherichia coli were the most prevalent... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy herd; Endometritis; Etiology; Antimicrobial. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600002 |
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| ANDRADE,THALLITA C.B.; LIMA,SIDNEY G. DE; FREITAS,RIVELILSON M.; ROCHA,MÁRCIO S.; ISLAM,TOREQUL; SILVA,TERESINHA G. DA; MILITÃO,GARDENIA C.G.. |
| Croton zehntneri (Euphorbiaceae) is a native aromatic plant from Northeast region of Brazil. The monoterpenoid estragole (ESL) has been isolated by classical chromatographic methods from the essential oil (EO) of C. zehnteneri leaves and characterized by GC-FID and GC-MS, its antimicrobial and cytotoxic potentials being assessed. The analysis of the EO enabled the identification of 100% of the integrated constituents, of which yield was about 1.8%. The main components identified were: eucalyptol, estragole (84.7%) and spathulenol. The dosage of 50 μg/disk of ESL presented fairly significant zones of inhibition against Gram-positive bacteria and fungi. The ESL presented toxicity against Artemia salina with LC50 and LC90 of 4,54 and 8,47 μg mL-1. However, in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Croton zehntneri; Cytotoxic; Estragole. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100173 |
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| Asencio,Geraldine; Lavin,Paris; Alegría,Karen; Domínguez,Mariana; Bello,Helia; González-Rocha,Gerardo; González-Aravena,Marcelo. |
| Background The increment of resistant strains to commonly used antibiotics in clinical practices places in evidence the urgent need to search for new compounds with antibacterial activity. The adaptations that Antarctic microorganisms have developed, due to the extreme environment that they inhabit, promote them as a potential new source of active compounds for the control of microorganisms causing infections associated with health care. The aim of this study was to evaluate the antibacterial activity of an ethanol extract of the Antarctic bacterium Janthinobacterium sp., strain SMN 33.6, against nosocomial multi-resistant Gram-negative bacteria. Results Inhibitory activity against human Gram-negative bacterial pathogens, with concentrations that varied... |
| Tipo: Journal article |
Palavras-chave: Antarctica; Antimicrobial; Antibiotic resistance; Bacterial pigment. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000100001 |
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| Biffi,CP; Stefani,LM; Miletti,LC; Matiello,CA; Backes,RG; Almeida,JM; Neves,GB. |
| Isolates of Salmonella sp (104) from poultry samples were isolated and serotyped where eleven were identified as Salmonella Typhimurium (ST). ST isolates were phenotypically tested by disk diffusion and minimum inhibitory concentration (MIC). Four genes related to enrofloxacin (GyrA, GyrB, ParC and ParE), two to gentamicin (AadA and AadB) and two to ceftiofur (BlaCMY-2 and AmpC) resistance were searched by PCR. Our results showed ST resistance to all three antibiotics tested (18.1% for ceftiofur, 45.4% for gentamicin, and 18.1% for enrofloxacin) according to the diffusion test. In the MIC test, the ST isolates showed higher levels of resistance (27.2% for ceftiofur, 54.5% for gentamicin, and 18.2% for enrofloxacin). Three resistance genes out of four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Gene; Resistance; Salmonella. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200013 |
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| BOLIGON,ALINE A.; PIANA,MARIANA; BRUM,THIELE F. DE; FROEDER,AMANDA L.F.; BELKE,BIANCA V.; SCHWANZ,THIAGO G.; MARIO,DÉBORA N.; ALVES,SYDNEY H.; ATHAYDE,MARGARETH L.. |
| The volatile oil from the stem bark of Scutia buxifolia (Rhamnaceae) has been obtained by hydrodistillation and analyzed by GC-MS. Twenty-one components were identified representing 99.93 % of the total oil composition, spathulenol (35.87%), β-cubebene (17.26%), germacrene D (6.43%), linalool (5.19%), carvacrol (4.05%) were the main components of S. buxifolia essential oil. Antioxidant and antimicrobial properties of the essential oil were evaluated by free radical scavenging (DPPH) assay and micro broth dilution method, respectively. S. buxifolia essential oil presented interesting radical scavenging activity (IC50 = 15.03 ± 0.11 µg/mL). The antibacterial assay showed that S. buxifolia stem bark essential oil was moderately active against the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scutia buxifolia; Essential oil; Antioxidant; Antimicrobial. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301463 |
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| Bordignon Junior,Sidnei Emílio; Miyaoka,Mitiyo Fukuda; Spier,Michele Rigon; Rubel,Rosália; Soccol,Vanete Thomaz; Soccol,Carlos Ricardo. |
| The aim of this study was to investigate the potential of lactic acid bacteria, bacilli and yeasts isolates to produce antimicrobial substances, especially against Gram-negative bacteria isolated from the animal faeces, searching for a new alternative to control the enteritis diseases in animal health. Evaluations were performed by microdilution in broth using crude extract obtained from the cultivation of 272 strains against Escherichia coli, S. Typhimurium, S. Enteritidis and Pseudomonas aeruginosa. Thirty-five lactic acid bacteria presented some antimicrobial action. One Lactobacillus isolate, named FLPB-1, was selected to studies the kinetics of the production. An important increase in the production was obtained when the producer strain had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Enteritis; Lactic acid bacteria; Bacteriocin. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400011 |
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| Cabanillas-Beltrán,Héctor; González-Estrada,Ramsés R; Gutiérrez-Martínez,Porfirio; Hernández-López,Silvia María. |
| Abstract Ultrasonic nebulization was used as a novel method of chitosan (CH) and acidic electrolyzed water (AEW) application on table eggs; effects on preservation, quality and antimicrobial properties were investigated. The effect of the application of CH and AEW alone or in combination on eggs quality was evaluated in terms of weight loss, shell thickness, yolk colour, Haugh units and shell strength. Additionally, the application of CH and AEW as antimicrobial agent was investigated in order to evaluate their efficacy against Salmonella enteritidis and Escherichia coli (ATCC 25922). A negative effect was observed by the sole application of AEW on eggshell thickness and strength. Conversely, the combination of AEW and CH improve eggshell strength, as well... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Biopolymer; Fogging; Sanitizer. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000200097 |
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| Cassien, Mathieu; Mercier, Anne; Thétiot-laurent, Sophie; Culcasi, Marcel; Ricquebourg, Emilie; Asteian, Alice; Herbette, Gaëtan; Bianchini, Jean-pierre; Raharivelomanana, Phila; Pietri, Sylvia. |
| Tamanu oil from Calophyllum inophyllum L. has long been used in traditional medicine. Ethanol extraction was found the best strategy for recovering bioactive compounds from the resin part of Tamanu oil, yielding two neutral and acidic resins fractions with high phenolics, flavonoids and pyranocoumarins concentrations. A further cascade of LPLC/HPLC separations of neutral and acidic resin fractions allowed identifying fifteen metabolites, and among them, calanolide D and 12-oxocalanolide A (both in neutral fraction) were first identified from a natural source. All these extracts, subfractions and isolated metabolites demonstrated increased free radical scavenging, antioxidant, anti-inflammatory, antimicrobial and antimycobacterial activity compared to... |
| Tipo: Text |
Palavras-chave: Calophyllum inophyllum L; Tamanu oil; Ethanol-soluble resin extracts; Lipophilic antioxidants; Phenolics; Pyranocoumarins; Antimicrobial; Anti-inflammatory; UV protection; EPR spin trapping. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00677/78918/81283.pdf |
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| Diniz-Santos,Daniel R.; Santana,José S.; Barretto,Junaura R.; Andrade,Maria Goreth M.; Silva,Luciana R.. |
| In the few cases of acute childhood diarrhea that require antimicrobial therapy, the correct choice of the drug depends on detailed previous knowledge of local strains. In order to establish such parameters in our city, we reviewed the results of all 260 positive stool cultures of children between 0 and 15 years of age during two years at a pediatric tertiary care facility in Salvador, Brazil. Bacterial strains had been presumptively identified by culturing in selective media and by biochemical testing, and their antimicrobial susceptibility patterns were automatically detected by the MicroScan Walkaway System. Data about patients' sex and age, monthly distribution of the cases, pathogens isolated and their antimicrobial resistance patterns were recorded.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diarrhea; Antimicrobial; Resistance; Children; Epidemiology. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000100013 |
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| Erener,Guray; Ocak,Nuh; Ozturk,Ergin; Cankaya,Soner; Ozkanca,Resit; Altop,Aydın. |
| ABSTRACT The objective of the study was to examine the effects of an alcoholic liquid olive leaf extract (OLE) obtained from fresh leaves on the growth performance, carcass weight, caecal microflora, and some plasma variables, such as triglycerides, total cholesterol, high-density lipoprotein (HDL), and low-density lipoprotein (LDL) cholesterol in broiler chickens. A total of 375 one-day-old male broilers (Ross 308) were randomly divided into five treatments with five replicate pens (15 birds each) per treatment. The birds were fed either a basal diet with no supplement (control), with 75 (OLE75), 150 (OLE150), 300 (OLE300), and 600 (OLE600) mg kg−1 oleuropein, provided by 0.66, 1.33, 2.65, and 5.32 g kg−1 of the OLE. The dietary supplementation of OLE... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Feed additive; Oleuropein; Olive leaves; Plant extract; Poultry. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100600 |
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| Fabri,Rodrigo L.; Coimbra,Elaine S.; Almeida,Ana C.; Siqueira,Ezequias P.; Alves,Tânia M.A.; Zani,Carlos L.; Scio,Elita. |
| In our previous work (Fabri et al. 2009), we showed that different extracts of Mitracarpus frigidus had significant antibacterial, antifungal and leishmanicidal activities. In order to increase our knowledge about this species, this work assesses the chemical composition and the in vitro biological activity of its essential oil. Thus, the essential oil obtained by hydrodistillation of the aerial parts of M. frigidus was analyzed by GC/MS. Among several compounds detected, 11 were identified, being linalool and eugenol acetate the major components. The essential oil exhibited a moderate antibacterial effect against Staphyloccocus aureus, Bacillus cereus, Pseudomonas aeruginosa and Enterobacter cloacae (MIC 250 µg/mL). On the other hand, it showed a strong... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitracarpus frigidus; Essential oil; Antimicrobial; Antileishmanial; Cytotoxicity. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400021 |
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| FABRI,RODRIGO L.; SÁ,DANIEL S. DE; PEREIRA,ANA PATRÍCIA O.; SCIO,ELITA; PIMENTA,DANIEL S.; CHEDIER,LUCIANA M.. |
| Manihot multifida (L.) Crantz (Euphorbiaceae) is widely used in popular medicine for the treatment of infected wounds. This study evaluated thein vitro antioxidant and antimicrobial potential of this species against strains of Gram-positive and Gram-negative bacteria and fungi, known to cause infections in humans. The extracts showed minimal inhibitory concentration (MIC) varying from 39 to 2500 µg/mL for antimicrobial activity. The methanolic extract of fruits, aqueous and hexane extracts of leaves showed a very strong activity against Candida albicans(ATCC 18804) with MIC of 39 µg/mL. Furthermore, the methanolic extract of M. multifida leaves exhibited DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging potential with inhibitory concentration (IC50) values... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Antioxidant; Candida albicans; Cytotoxicity; Manihot multifida. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100303 |
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| Falaise, Charlotte; Francois, Cyrille; Travers, Marie-agnes; Morga, Benjamin; Haure, Joel; Tremblay, Rejean; Turcotte, Francois; Pasetto, Pamela; Gastineau, Romain; Hardivillier, Yann; Leignel, Vincent; Mouget, Jean-luc. |
| The search for novel compounds of marine origin has increased in the last decades for their application in various areas such as pharmaceutical, human or animal nutrition, cosmetics or bioenergy. In this context of blue technology development, microalgae are of particular interest due to their immense biodiversity and their relatively simple growth needs. In this review, we discuss about the promising use of microalgae and microalgal compounds as sources of natural antibiotics against human pathogens but also about their potential to limit microbial infections in aquaculture. An alternative to conventional antibiotics is needed as the microbial resistance to these drugs is increasing in humans and animals. Furthermore, using natural antibiotics for... |
| Tipo: Text |
Palavras-chave: Biological activity; Antimicrobial; Antibacterial; Antifungal; Antiviral; Biological activity; Haslea; Microalgae; Sustainable aquaculture. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00349/46052/45719.pdf |
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| Gandra,Jefferson Rodrigues; Takiya,Caio Seiti; Oliveira,Euclides Reuter de; Paiva,Pablo Gomes de; Goes,Rafael Henrique de Tonissi e Buschinelli de; Gandra,Érika Rosendo de Sena; Araki,Hayne Mayumi Cariolano. |
| ABSTRACT This study was undertaken to determine the effects of chitosan and whole raw soybean on nutrient intake and total tract digestion, nitrogen utilization, microbial protein synthesis, blood metabolites, and energy balance of dairy heifers. Twelve Jersey heifers (6±0.5 months of age and 139.50±25.56 kg of live weight; mean ± standard deviation) were randomly assigned to a replicated Latin square design with a 2 × 2 factorial arrangement. The experimental period consisted of 14 days of adaptation to diets, six days of sampling, and five days of washout. The experimental diets were: control (CO); chitosan (CHI, inclusion of 2.0 g kg−1 DM of chitosan); whole raw soybean (WS, 163.0 g kg−1 of WS on diet DM basis); and chitosan + whole raw soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Nitrogen metabolism; Oilseed; Rumen modulator. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000300130 |
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| Gonzalez, Marcelo; Gueguen, Yannick; Destoumieux Garzon, Delphine; Romestand, Bernard; Fievet, Julie; Pugniere, M; Roquet, F; Escoubas, Jean-michel; Vandenbulcke, F; Levy, O; Saune, Laure; Bulet, P; Bachere, Evelyne. |
| A cDNA sequence with homologies to members of the LPS-binding protein and bactericidal/permeability-increasing protein (BPI) family was identified in the oyster Crassostrea gigas. The recombinant protein was found to bind LIPS, to display bactericidal activity against Escherichia coli, and to increase the permeability of the bacterial cytoplasmic membrane. This indicated that it is a BPI rather than an LPS-binding protein. By in situ hybridization, the expression of the C gigas BPI (Cg-bpi) was found to be induced in hemocytes after oyster bacterial challenge and to be constitutive in various epithelia of unchallenged oysters. Thus, Cg-bpi transcripts were detected in the epithelial cells of tissues/organs in contact with the external environment (mantle,... |
| Tipo: Text |
Palavras-chave: Oyster innate immunity; Mollusk; Hemocyte; Epithelia; Antimicrobial. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3564.pdf |
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| Registros recuperados: 56 | |
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