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Search Results: 1 - 10 of 403877 matches for " Concepta M;Menezes "
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Mineraliza??o de esterco de ovinos e sua influência na produ??o de alface
Figueiredo, Cícero Célio de;Ramos, Maria Lucrécia G;McManus, Concepta M;Menezes, Adriana M de;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000100029
Abstract: several organic wastes are used in agriculture with no precise knowledge about the mineralization dynamics of these materials. in this study the sheep manure mineralization and its influence on the lettuce production was evaluated. a randomized block design with three replications was used. five treatments were studied using 25 t ha-1 as dose of manure: 1) sheep manure obtained from animals fed with cassava straw (pam); 2) sheep manure obtained from animals fed with residue of pea crop (erv); 3) sheep manure obtained from animals fed with coast-cross hay (fcc), 4) sheep manure obtained from animals fed with saccharin residue (sac) and 5) soil without application of manure (control). weekly the basal respiration was determined and used as an indicator of organic matter mineralization. lettuce fresh mass was evaluated as a measure of production. treatments erv, fcc and sac showed superior weight gains of 68, 65 and 62% compared to the control and 43, 39 and 33% compared to map, respectively. lower production promoted by the map in relation to the other treatments can be explained by organic matter mineralization that showed a high microbial respiration five days after transplanting, with marked decline in subsequent measurements during the crop cycle. the other systems showed mineralization synchronized with the production increase of lettuce fresh mass.
A Toxicological Assessment of Endocrine Disrupting Chemicals Found in the BMW (Border, Midland and Western) Region of Ireland  [PDF]
Kathryn M. Quinn-Hosey, James J. Roche, Andrew M. Fogarty, Concepta A. Brougham
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.34039
Abstract: A battery of tests was established to determine the oestrogenic, mutagenic and genotoxic potential of two categories of endocrine disrupting chemicals (EDCs), phthalates and alkylphenols. Diisononylphthalate (DINP), diethylhexylphthalate (DEHP), dibutylphthalate (DBP), diisododecylphthalate (DIDP) and 4-nonylphenol (4-NP) were oestrogenic in the yeast estrogen screen (YES) assay and potently oestrogenic in the MVLN and E-SCREEN assays at environmentally relevant concentrations. DINP and 4-NP were mutagenic in the Ames assay and also induced significant levels of unscheduled DNA synthesis and DNA strand breakage. Significant induction in the percentage of cells containing micronuclei was observed after treatment with DINP, DEHP and 4-NP. In addition, sewage effluents from sewage treatment plants (STPs) in the Border, Midlands and Western (BMW) region of Ireland were significantly oestrogenic in the YES assay. Moreover, analysis of levels of phthalates and alkylphenol identified in Irish rivers receiving treated effluent showed potent oestrogenicity in the YES assay. The proliferative and genotoxic ability of the phthalates and alkylphenol, and the oestrogenicity of the treated effluents reported here, is significant as these EDCs and EDCs within the effluent may play a role in the etiology of human abnormalities.
Screening for Genotoxicity and Oestrogenicity of Endocrine Disrupting Chemicals in Vitro  [PDF]
Karthryn M. Quinn-Hosey, James J. Roche, Andrew M. Fogarty, Concepta A. Brougham
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.328105
Abstract: A diverse range of endocrine disrupting chemicals (EDCs) was examined, using an in vitro test system, for critical events required for the onset of carcinogenesis in vivo. The initiation stage of carcinogenesis is a genotoxic process. 4-Octylphenol (alkylphenol), bisphenol A (plasticiser), coumestrol and genistein (phytoestrogens), 2,4-dichlorophe- noxyacetic acid and toxaphene (pesticides) and ethinylestradiol (synthetic hormone) were investigated for potential mutagencicity, DNA strand breakage, clastogenicity and DNA repair. Significant induction in the percentage of cells containing micronuclei was observed for all the EDCs. Toxaphene and coumestrol were mutagenic in the Ames assay. They also induced significant levels of unscheduled DNA synthesis and DNA strand breakage. Bisphenol A induced low level DNA strand breakage in HepG2 cells in the comet assay. The EDCs, with the exception of toxaphene, induced transcriptional activation in the yeast estrogen screen (YES) assay. They were potently oestrogenic in the mammalian based MVLN (transactivation) and E-SCREEN (proliferation) assays. This report on the transactivational, proliferative and genotoxic ability of the EDCs suggests that these chemicals may play a role in the etiology of male and female reproductive cancers.
Comparison of Lipase Production by Enterococcus faecium MTCC 5695 and Pediococcus acidilactici MTCC 11361 Using Fish Waste as Substrate: Optimization of Culture Conditions by Response Surface Methodology
Vrinda Ramakrishnan,Louella Concepta Goveas,Bhaskar Narayan,Prakash M. Halami
ISRN Biotechnology , 2013, DOI: 10.5402/2013/980562
Abstract:
Comparison of Lipase Production by Enterococcus faecium MTCC 5695 and Pediococcus acidilactici MTCC 11361 Using Fish Waste as Substrate: Optimization of Culture Conditions by Response Surface Methodology
Vrinda Ramakrishnan,Louella Concepta Goveas,Bhaskar Narayan,Prakash M. Halami
ISRN Biotechnology , 2013, DOI: 10.5402/2013/980562
Abstract: A medium using fish waste as substrate was designed for production of lipase by Enterococcus faecium MTCC 5695 and Pediococcus acidilactici MTCC 11361. Medium components and culture conditions (fish waste protein hydrolysate (FWPH) concentration, fish waste oil (FWO) concentration, pH, temperature, and fermentation time) which affect lipase production were screened using factorial (5 factors ? 2 levels) design of which FWPH concentration, FWO concentration, and fermentation time showed significance ( ). The levels of these factors were optimized further by Box-Behnken design using response surface methodology (RSM). Optimized conditions were found to be 5%?v/v FWO, 0.15?mg/mL FWPH and 24?h of fermentation time for MTCC 5695, and 4%?v/v FWO, 0.15?mg/mL FWPH and 24?h of fermentation for MTCC 11361, which were further validated. Under optimized conditions, MTCC 5695 and MTCC 11361 showed 3.15- (543.63 to 1715?U/mL) and 2.3- (214.74 to 493?U/mL) fold increase in lipase production, respectively, as compared to unoptimized conditions. 1. Introduction Lipases (triacylglycerol acylhydrolases EC 3.1.1.3) are a class of serine hydrolases which catalyze the hydrolysis of triglycerides to glycerol and free fatty acids over oil-water interface [1]. In addition, lipases catalyze the hydrolysis and transesterification of other esters as well as the synthesis of esters and exhibit enantioselective properties [2]. These unique properties of lipases make them a very important enzyme of industrial significance. Lipases are used in chemical processing, dairy industries for improvement of flavour, paper industries, oleochemical industries, pharmaceuticals, synthesis of surfactants, detergent industries, leather industries, and polymer synthesis [3, 4]. Lipases are produced by plants, animals, and microbes but only microbial lipases are found to be industrially important since they are diversified in their enzymatic properties and substrate specificity [5]. Bacterial lipases that are of commercial importance are obtained from Achromobacter, Alcaligenes, Arthrobacter, Bacillus, Burkholderia, Chromobacterium, and Pseudomonas [6, 7]. Lactic Acid Bacteria (LAB) are generally considered to be weakly lipolytic, as compared to other groups of microorganisms. The lipolytic activity by LAB plays an important role in the determination of special aroma of different cheeses [8, 9]. Since they are considered as generally recognised as safe (GRAS), they are used extensively as starter cultures in food and feed industries [10]. Although there are reports on lactic acid bacterial lipase
Parasitic diseases in the returning traveller
M Grobusch, C Menezes
Continuing Medical Education , 2009,
Abstract: Parasitic infections often present with nonspecific symptoms
Tradi o e experiência: uma invers o cultural do pensável pelas práticas
Jonathan M. Menezes
Antíteses , 2010,
Abstract: O estudo do protestantismo é algo que tem fascinado a muitos pesquisadores nos últimos anos. A multiplicidade que o constitui, as combina es que ele engloba e as metamorfoses pelas quais têm passado s o o cerne temático desse artigo. Como amostra de uma parcela dessa realidade, esse estudo envolve tanto um diálogo com alguns teóricos da história e da s0ciologia que se ocuparam desse campo, como uma abordagem a histórias e experiências de praticantes de uma comunidade religiosa em Londrina, no Paraná. A partir dessa fus o de olhares, postulou-se que o sagrado que se manifesta nesse ambito n o é fruto de mera repeti o de modelos, mas de recria es, reinven es da tradi o, a partir da experiência singular de fé das pessoas em seus contextos particulares de vida. Em virtude disso, tanto nos discursos como nas práticas religiosas ocorreram rupturas, que ora penderam para uma flexibiliza o, ora para um refor o de trincheiras religiosas.
Gravitational Analog of the Electromagnetic Poynting Vector
L. M. de Menezes
Physics , 1998,
Abstract: The gravitational analog of the electromagnetic Poynting vector is constructed using the field equations of general relativity in the Hilbert gauge. It is found that when the gravitational Poynting vector is applied to the solution of the linear mass quadrupole oscillator, the correct gravitational quadrupole radiation flux is obtained. Further to this, the Maxwell-like gravitational Poynting vector gives rise to Einstein's quadrupole radiation formula. The gravitational energy-momentum (pseudo) tensor obtained is symmetric and traceless. The former property allows the definition of angular momentum for the free gravitational field.
Perception of the Community towards Child Sexual Abuse: A Case of Chawama Lusaka, Zambia  [PDF]
Kabwe Chitundu, Lonia Mwape, Concepta Kwaleyela
Open Journal of Psychiatry (OJPsych) , 2018, DOI: 10.4236/ojpsych.2018.83026
Abstract: A number of scholars have reported high incidence of sexual abuse cases among children in the communities. However, little is known about the perceptions the community people have towards child sexual abuse cases. Therefore, this study aimed to explore the perception of the community towards child sexual abuse which hinders the disclosure and reporting of abuse cases. Data were collected through focused group discussions and indepth interviews, with sixty nine participants from nine (9) focused group discussions and nine (9) indepth interviews. Participants were the general community members and relatives to abused children. The interviews were recorded verbatim and transcribed; analysis of data was done using qualitative thematic analysis. Three themes emerged summarizing the factors associated with non-reporting of child sexual abuse cases which included, fear of family and community breakdown, relationship between the victim and the perpetrator and inadequate service provision by the police which also reflected the community’s role in supporting the child. In conclusion the study therefore showed that child sexual abuse is common in Zambia and cases are still on the increase. However, there is great need to enforce laws regarding sexual abuse and in addition great change in attitude is needed to prevent occurrence of cases.
Analysis of Bio-Obtainable Endocrine Disrupting Metals in River Water and Sediment, Sewage Influent/Effluent, Sludge, Leachate, and Concentrated Leachate, in the Irish Midlands Shannon Catchment
Antoinette M. Reid,Concepta A. Brougham,Andrew M. Fogarty,James J. Roche
International Journal of Analytical Chemistry , 2009, DOI: 10.1155/2009/325496
Abstract: The application of an acid digestion and subsequent solid-phase extraction (SPE) procedure were implemented as preliminary treatments prior to quantifying the levels of potentially endocrine disrupting metals (EDMs) in a variety of solid and liquid matrices. These included (solid) river sediment, leachate sediment and sewage sludge and also (liquid) river water, landfill leachate, concentrated leachate, sewage influent, and sewage effluent, sampled in the Irish Midlands. The total concentrations of cobalt (Co), cadmium (Cd), copper (Cu), chromium (Cr), nickel (Ni), lead (Pb), zinc (Zn), and manganese (Mn), after extraction and preconcentration, were determined by atomic absorption spectroscopy (AAS). Mercury (Hg) in sediment and sludge was determined using cold-vapour atomic fluorescence spectroscopy (AFS). For sewage sludge maximum values (mg/kgdw) of 4700 Ni, 1642 Mn, 100.0 Cd, 3400 Zn, 36.70 Co, 750.0 Pb, 485.8 Cr, and 1003 Cu were determined whilst in leachate sediment, maximum values (mg/kgdw) of 32.10 Ni, 815.0 Mn, 32.78 Cd, 230.3 Zn, 26.73 Co, 3525 Pb, 124.9 Cr, and 50.13 Cu were found. Over several months, the data showed elevated levels in sewage influents, effluents, and sludges compared to a battery of adjacent river water samples and corresponding sediments. There was a definite trend for target values for sediments to be exceeded, while intervention values were only exceeded for cadmium. Overall the pattern in terms of concentration was sewage > leachate > river matrices. A nonparametric assessment of the effect of sewage treatment method on median metal levels in sludge revealed statistically significant differences at the 95% level of confidence for Co, Cr, and Hg and at the 90% level of confidence for Cd.
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