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Search Results: 1 - 10 of 406600 matches for " S.T. Ogunbanwo "
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Microbial and Sensory Changes During the Cold Storage of Chicken Meat Treated with Bacteriocin from L. brevis OG1
S.T. Ogunbanwo,B.M. Okanlawon
Pakistan Journal of Nutrition , 2006,
Abstract: The influence of Bacteriocin produced by L. brevis OG1 on safety and sensory analysis of chicken tissue immobilized in edible film and stored at 4oC were assessed. Immobilization of Bacteriocin in gel and application to the surface of lean tissue of broiler chicken was effective for reducing microbial load up to 21 days at 4oC when compared with untreated chicken tissue. The microbial population of untreated and alginate - treated chicken tissue grew to greater than 8 log10 after 21days under refrigerated conditions while that of Bacteriocin treated and alginate - Bacteriocin treated samples of chicken tissue was less than 6 log10 after 21 days. Microbial counts in post - rigor tissue treatments were greater than that obtained from pre - rigor tissue treatments. Chicken lean tissue treated with Bacteriocin - alginate solution has the best sensory attributes in terms of appearance and odour. This indicated that immobilization of bacteriocin in edible film could extend shelf - life of chicken up to 14 days during refrigerated storage without adversely affecting the odour, and appearance of the chicken and increased safety of the chicken for human consumption.
Influence of Nutrients Utilization and Cultivation Conditions on the Production of Lactic Acid by Homolactic Fermenters
S.T. Ogunbanwo,B.M. Okanlawon
Biotechnology , 2009,
Abstract: Homofermentative lactic acid bacteria isolated from retted cassava ware screened for the production of lactic acid, pH survival and influence of nutrients utilization and cultivation conditions on the production of lactic acid by fermentation. All the Lactobacillus species isolated produced little quantity of lactic acid when grown at 30 °C in normal De Man Rogosa Sharpe (MRS) broth. However, a temperature of 40 °C at initial pH of 5.5 in constituted MRS medium with 6% (w/v) carbon concentration of D-glucose and 4% (w/v) nitrogen concentration of yeast extract fermented for 48 h supported lactic acid production optimally with Lactobacillus acidophilus producing 18.4 ± 0.01 g L-1 of lactic acid. Lactobacillus casei had the highest percentage cell destruction (53.93%) in phosphate buffered saline pH 3.0 while L. acidophilus had the least (18.87%). Lactic acid produced by all the Lactobacillus species inhibited at least two or more food spoilage and/or pathogenic microorganisms and can be used in the food industry for decontamination of meat and poultry carcasses.
Influence of cultural conditions on the production of bacteriocin by Lactobacillus brevis OG1
S.T. Ogunbanwo, A.I. Sanni, A. A. Onilude
African Journal of Biotechnology , 2003,
Abstract: Bacteriocin produced by Lactobacillus brevis OG1 has large spectrum of inhibition against pathogenic, food spoilage microorganisms and various Lactic acid bacteria employed as test strains. The bacteriocin inhibited E coli NCTC 10418 and Enterococcus faecalis, but did not inhibit Candida albicans ATCC 10231 and Klebsiella sp. UCH 15. The antibacterial activity appeared to be pronounced between early logarithmic and early stationary phase. Supplementation and/or replacement of nutrients demonstrated that larger quantities of bacteriocin could be produced by addition of yeast extracts (3.0%), NaCl (1.0-2.0%), glucose (1.0 %) and Tween 80 (0.5%), while addition of tri-ammonium citrate, sodium acetate, magnesium sulphate, manganese sulphate and potassium phosphate had no effect on production. Maximal activity in composed medium was achieved at initial pH of 5.5, and incubation period of 48h at 30-37oC. (African Journal of Biotechnology: 2003 2(7): 179-184)
Characterization of bacteriocin produced by Lactobacillus plantarum F1 and Lactobacillus brevis OG1
S.T. Ogunbanwo, A.I. Sanni, A. A. Onilude
African Journal of Biotechnology , 2003,
Abstract: Lactobacillus plantarum F1 and L. brevis OG1 isolated from Nigerian fermented food products, produced bacteriocins that had broad spectrum of inhibition against both pathogenic, food spoilage organisms and various lactic acid bacteria. The test organisms exhibited activities of 6400 and 3200 AU/ml respectively against Escherichia coli NCTC10418 and Enterococcus faecalis EF1, but did not inhibit Candida albicans ATCC10231 and Klebsiella sp. UCH15. Comparison of the antimicrobial spectra and characterization of the two bacteriocins were not identical. Bacteriocin produced by L. brevis OG1 was the most heat stable at 121°C for 60 min, while that of L. plantarum F1 was stable at 121°C for 10 min. The bacteriocins produced by the test isolates maintained full stability after storage for 60 days at – 20°C; partial stability after storage for 120 days at 4°C; while activity was not detected after storage for 80 to 120 days at 37°C. Bacteriocin produced by L. brevis OG1 was stable at pH range of 2.0 to 8.0 while, that of L. plantarum F1 was found to be stable at pH 2.0 to 6.0. Their active principle was proteinaceous in nature since the bacteriocins were inactivated by proteolytic enzymes, but not by other non–proteolytic enzymes. mitomycin C and uv light did not affect the activity of the bacteriocins, while chloroform extraction completely destroyed their activity. Exposure to surfactant resulted in an increase in the bacteriocin titre, except Nonidet P-40, which led to total loss of bacteriocin activity. The bacteriocins were able to pass through cellulose membranes with 100,000 KDa and 1,000,000 KDa but could not pass through one with a 10,000 KDa and 1,000 KDa molecular weight cut off. The paper concluded that the ability of bacteriocins produced by the test isolates in inhibiting a wide-range of bacteria, is of potential interest for food safety and may have future applications as food preservative. (African Journal of Biotechnology: 2003 2(8): 219-227)
Antagonistic Activities of Lactic Acid Bacteria Isolated from Nigerian Fermented Dairy Food Against Organisms Implicated in Urinary Tract Infection
B.A. Adeniyi,F.A. Ayeni,S.T. Ogunbanwo
Biotechnology , 2006,
Abstract: Five Lactic Acid Bacteria (LAB) were isolated from different indigenous fermented dairy foods and identified as Lactobacillus fermentum, L. brevis, L. plantarum, Lactococcus lactis and Streptococcus durans. The cell free supernatant of the selected LAB were able to inhibit the growth of all organisms implicated in urinary tract infection (UTI) used in this study. The largest zone of inhibition was produced by Lac. lactis K3 against Staphylococcus saprophyticus UCH 2051. The sensitivity of UTI pathogens to different antibiotics was investigated. The entire Gram-negative pathogens from UTI showed 100% resistance to Colistin, Augmentin, Nalidix acid, Nitrofuranton and Cotrimoxazole while most Gram positive pathogens from UTI were sensitive to different antibiotics used against them. The tested LAB produced various antimicrobial compounds such as organic acid, hydrogen peroxide and diacetyl. The highest yield of lactic acid (1.87 g L-1) was produced by Streptococcus durans K4 while the highest yield of diacetyl (2.324 g L-1) was produced by L. brevis M5 and the highest yield of hydrogen peroxide (0.00544 g L-1) was produced by L. plantarum N2.
Avalia??o do papel do cirurgi?o no tratamento do Tumor de Wilms: análise de um estudo cooperativo
Schettini, S.T.;
Revista da Associa??o Médica Brasileira , 1999, DOI: 10.1590/S0104-42301999000400010
Abstract: objectives: to detect the effects of the surgical treatment and staging on the obtained results and to check the possible relationship between these results and the compliance, or not, with the preset surgical approach protocol (in accordance with the national wilms tumor study-nwts).. material and method: one hundred and sixty six operated on patients entered between october 1986 and december 1988, with the data updated until february 1992 were studied. the minimum follow-up period was 24 months for 147 patients (average 36 months). the remaining 19 patients were followed in the outpatient clinic for three to 18 months. results: after submitting these data to statistical analysis and the obtained results compared to those in the literature we observed that: -previous ligature of the renal vessels had no discernible effect on the ultimate outcome (relapses and mortality); -intra-operative tumoral rupture with contamination of the peritoneal cavity unfavorably interferes with the mortality rate; -even when the adrenal and the perirenal fat are normal from the surgeon's point of view, the histological findings showed tumor contamination in a number of cases; -there is a worse prognosis when the tumor weight exceeds 500 g; -according to the lymphonode evaluation, sur- geon's performance was not in accordance with the protocol recommendations, considering that the node evaluation was neglected in 56.6% of the patients. this led to a surgical staging error and has contributed to some unexpected results like: -lower relapses rate in the patients with affected lymphnodes; -higher incidence of lung metastases in patients without lymphnodes analysis; -stage ii patients with better prognosis, compared to stage i patients and patients with stage i and iii having similar relapse rates. conclusion: from the above-referred results, we concluded that some omissions have happened jeopardizing accuracy of the surgical staging in a significant way. in this way, in our environment the
Priorities in seed pathology research
Nameth, S.T.;
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000500017
Abstract: seed pathology as a subdisipline of plant pathology is relatively new. paul neergard is considered the father of seed pathology. recent developments in the area of seed pathology technology allow for more ecofriendly seed treatments and more reliable seed health testing. due to economics and new interest in environmental issues, research into the viability of biological seed treatments is becoming more common. the use of sophisticated dna amplification technologies allows for the detection of seedborne pathogens that might go undetected using more conventional means. these types of research will be fundamental in guaranteeing seed health quality standards and achieving phytosanitary requirements throughout the world in the new millennium.
Market Orientation in a Small Scale Enterprise Environment: Importance of Product-Related Factors
S.T. Akinyele
International Business Management , 2012, DOI: 10.3923/ibm.2010.162.170
Abstract: This study uses the results of an evaluation programme to examine the value of a market orientation for small scale manufacturer in the mass retail market. Results show that an evaluator s assessment of a product s readiness for the marketplace and his/her recommendation for the type of market it should enter were better at predicting short-term and long-term performance than market orientation alone.
A Simple Laboratory Prescreen for Plants with Grain Protectant Effects Against the Maize Weevil; Sitophilus zeamais (Mots) (Coleoptera: Curculionidae)
S.T. Arannilewa
Agricultural Journal , 2013,
Abstract: A simple bioassay technique to assess pulverized indigenous plant materials for ability to protect maize grains from damage by weevils during storage, was employed. Of the 9 plants that were screened, Zanthoxylum xanthoxyloides (Lam.) Waterm. (Rutaceae), Aristolochia ringens Vahl. (Aristolochiaceae) and Morinda lucida Linn. (Rubiaceae) showed best protectant effects on adult toxicity, adult emergence and Weevil Perforation Index (WPI). The details of the bioassay procedure used and the results obtained are reported.
The First Peanut (Arachis hypogaea L.) Crosses in Greece and Transgressive Segregation on Yield Characteristics of Pedigree Selected Accessions
S.T. Kotzamanidis
Pakistan Journal of Biological Sciences , 2006,
Abstract: The first peanut crosses ever tried in Greece were performed over two growing seasons (1985 and 1986). The 13 successful crosses in 1985 belong to the following crossing schemes: Virginia x Spanish, Virginia x Valencia, Valencia x Virginia, Virginia x Virginia, Valencia x Valencia and Valencia x Spanish. The 7 successful crosses in 1986 belong to 2 crossing schemes: Virginia x Valencia and Virginia x Virginia. It resulted that in the climatic conditions of Greece a higher percentage of success can be achieved (16%), when the crosses are realized as early as possible so that the high summer temperatures can be avoided. Also, the transgressive segregation for yield characteristics of 100-pod weight and 100-seed weight was studied during the years 1985-1990 in the Cotton Research Institute. Pedigree selection was applied from the F3 to F5 generation and segregated materials together with the parental varieties were evaluated. Most of the selections that showed transgressive segregation belonged to the cross type Virginia x Spanish. Data indicated that yield and quality of peanuts could be improved by exploiting the phenomenon of transgressive variation occurring principally in crosses between varieties that belong to peanut types Virginia and Spanish.
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