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Search Results: 1 - 10 of 51349 matches for " Carina Silva Fragozo "
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CULTURA E SOCIOLINGUíSTICA NO ENSINO E NA APRENDIZAGEM DE LíNGUA ESTRANGEIRA Carina Silva Fragozo
Carina Silva Fragozo
Fólio : Revista de Letras , 2011,
Abstract: Due to the incontestable relations among language, society and culture, this article presents the interface between Sociolinguistics and Foreign Language Acquisition, which considers social aspects that may influence foreign language learning. Besides, it approaches the discussion about interlanguage variation, which is a questionable issue because it implicates that learning is not complete until the learner reaches native competence. Finally, this paper presents a reflection on the role of cultural aspects in teaching foreign languages, especially English, and reflects on the importance of sociolinguistic knowledge for pedagogical practice.
Origen anómalo de la coronaria izquierda en la arteria pulmonar: una serie de casos
Gutiérrez,Jaiber; Pérez,Raúl; Mu?oz,Clímaco; Silva,Gloria; Daza,Virginia; Fragozo,Carlos; Cadavid,Eduardo;
Revista Colombiana de Cardiología , 2009,
Abstract: anomalous origin of the left coronary artery from the pulmonary artery (alcapa) is a congenital cardiac anomaly with low incidence and a broad clinical spectrum. its main form of presentation is congestive heart failure due to dilated cardiomyopathy. we reviewed clinical histories and collected 5 consecutive alcapa cases; its clinical symptoms, diagnosis and treatment were described. all five patients were discharged in better clinical conditions and continue attending to periodic medical follow-up. these cases illustrate the alcapa as part of the differential diagnosis of dilated cardiomyopathy.
The influence of the blood pressure on the venous cerebral flow measured by magnetic susceptibility (SWI) technique  [PDF]
Hugo Martins, Marlene Carreiras, M. Margarida Ribeiro, Paulo Sousa, Carina Silva-Forte
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.63A053
Abstract:
Susceptibility Weighted Image (SWI) is a Magnetic Resonance Imaging (MRI) technique that combines high spatial resolution and sensitivity to magnetic susceptibility differences between tissues, it is extremely sensitive to venous blood due to its iron content of deoxyhemoglobin. The aim of this study was to evaluate the differences in the cerebral venous vasculature produced by the value’s variation of blood pressure. 20 subjects (10 hypertensive and 10 normotensive patients) underwent a MRI system with field strength of 1.5 T using a synergy head coil (7 channels). The obtained sequences were T1w, T2w-FLAIR, T2* and SWI. The value of Contrast-to-Noise Ratio (CNR) was assessed in MinIP (Minimum Intensity Projection) and Magnitude images, through drawing free hand ROIs in venous structures: Superior Sagittal Sinus (SSS) Internal Cerebral Vein (ICV) and Sinus Confluence (SC). The obtained values were presented in descriptive statistics-quartiles and extremes diagrams. The results were compared between groups. CNR shown higher values for normotensive group in MinIP (108.89 ± 6.907) to ICV; (238.73 ± 18.556) to SC and (239.384 ± 52.303) to SSS. These values are bigger than images from Hypertensive group about 46 au in average. Comparing the results of Magnitude and MinIP images, there were obtained lower CNR values for the hypertensive group. There were differences in the CNR values between both groups, being these values more expressive in the large vessels-SSS and SC. The SWI is a potential technique to evaluate and characterize the blood pressure variation in the studied vessels adding a physiological perspective to MRI and giving a new approach to the radiological vascular studies.
Arrow plot: a new graphical tool for selecting up and down regulated genes and genes differentially expressed on sample subgroups
Carina Silva-Fortes, Maria A A Turkman, Lisete Sousa
BMC Bioinformatics , 2012, DOI: 10.1186/1471-2105-13-147
Abstract: This method was applied to a publicly available dataset, as well as to a simulated dataset. We compared our results with the ones obtained using some of the standard methods for detecting differentially expressed genes, namely Welch t-statistic, fold change (FC), rank products (RP), average difference (AD), weighted average difference (WAD), moderated t-statistic (modT), intensity-based moderated t-statistic (ibmT), significance analysis of microarrays (samT) and area under the ROC curve (AUC). On both datasets all differentially expressed genes with bimodal or multimodal distributions were not selected by all standard selection procedures. We also compared our results with (i) area between ROC curve and rising area (ABCR) and (ii) the test for not proper ROC curves (TNRC). We found our methodology more comprehensive, because it detects both bimodal and multimodal distributions and different variances can be considered on both samples. Another advantage of our method is that we can analyze graphically the behavior of different kinds of differentially expressed genes.Our results indicate that the arrow plot represents a new flexible and useful tool for the analysis of gene expression profiles from microarrays.
Production and characterization of glucoamylase from fungus Aspergillus awamori expressed in yeast Saccharomyces cerevisiae using different carbon sources
Pavezzi, Fabiana Carina;Gomes, Eleni;Silva, Roberto da;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000100024
Abstract: glucoamylase is widely used in the food industry to produce high glucose syrup, and also in fermentation processes for production beer and ethanol. in this work the productivity of the glucoamylase of aspergillus awamori expressed by the yeast saccharomyces cerevisiae, produced in submerged fermentation using different starches, was evaluated and characterized physico-chemically. the enzyme presented high specific activity, 13.8 u/mgprotein or 2.9 u/mgbiomass, after 48 h of fermentation using soluble starch as substrate. glucoamylase presented optimum activity at temperature of 55oc, and, in the substratum absence, the thermostability was for 1h at 50oc. the optimum ph of activity was ph 3.5 - 4.0 and the ph stability between 5.0 and 7.0. the half life at 65oc was at 30.2 min, and the thermal energy of denaturation was 234.3 kj mol-1. the hydrolysis of different substrate showed the enzyme's preference for the substrate with a larger polymerization degree. the gelatinized corn starch was the substratum most susceptible to the enzymatic action.
Validity of the Community Periodontal Index of Treatment Needs' (CPITN) for population periodontitis screening
Bassani, Diego Garcia;Silva, Carina Maciel da;Oppermann, Rui Vicente;
Cadernos de Saúde Pública , 2006, DOI: 10.1590/S0102-311X2006000200005
Abstract: the aim of the present study was to validate two versions of cpitn for periodontitis diagnosis. a sample of 400 individuals underwent full mouth periodontal examination including clinical attachment loss, periodontal pocket depth, and sub-gingival calculus. full and partial cpitn versions were derived from this exam (gold standard). contingency tables were constructed and operational characteristics obtained, as well as roc curves. the results show 58% sensitivity for full cpitn and 80.6% specificity. positive and negative predictive values were 87% and 46.3%, respectively. according to the test, estimated periodontitis prevalence was 46%, while the figure obtained with the gold standard was 69%. the partial version of the cpitn showed 50% sensitivity and 87.1% specificity. positive and negative predictive values were 89.6% and 43.9%, respectively. estimated periodontitis prevalence, through partial cpitn, was 30.5%. adjusted global agreement (kappa) for partial and full cpitn was 0.32 and 0.29, respectively. both cpitn versions disagreed significantly with gold standard results (chi-square p < 0.001). as a conclusion, both total and partial cpitn failed to reflect the real periodontal status of the sample.
Características de pacientes disfágicos em servi?o de atendimento domiciliar público
Paix?o, Carina Teixeira;Silva, Lolita Dopico da;
Revista Gaúcha de Enfermagem , 2010, DOI: 10.1590/S1983-14472010000200009
Abstract: this article discusses the characteristics of dysphagic patients victims of a stroke. the objectives were to identify the profile of patients with dysphagic and measure its association with age, risk factors, episodes of stroke and consistency of food. methodology the cross-sectional study sample of thirty patients. results show all 17 dysphagic patients were hypertensive and more than half also diabetic (58.82%). all they had ischemic stroke. there was no association between dysphagic and age nor with the frequency of stroke episodes. patients with hypertension and diabetes had higher odds ratio for dysphagic referred to swallow liquids. discussion, they were all elderly with three risk factors hypertension, diabetes and obesity and with increased difficulty in swallowing liquids than solids. it is concluded that the nurse needs to train to recognize the dysphagic and its complications such as pneumonia and malnutrition.
Idea es e tentativas de suicídio em adolescentes com práticas sexuais hetero e homoeróticas Suicide thoughts and attempts of suicide in adolescents with hetero and homoerotic sexual practices
Fernando Silva Teixeira-Filho,Carina Alexandra Rondini
Saúde e Sociedade , 2012, DOI: 10.1590/s0104-12902012000300011
Abstract: Esta pesquisa, que teve como popula o-alvo adolescentes com idade entre 12 e 20 anos, residentes em três municípios do interior Paulista, buscou conhecer as associa es entre orienta o sexual e idea es e tentativas de suicídio. Corroborando com as pesquisas internacionais, evidenciou-se que os n o heterossexuais têm mais chances de pensarem e tentarem suicídio, comparativamente aos heterossexuais. Todavia, encontrou-se que, dentre o grupo de adolescentes que se assumiram n o heterossexuais, os que est o mais vulneráveis s o aqueles que se autodefiniram bissexuais e "outros", os quais constituem o grupo de pessoas menos assumidas, dentre os n o heterossexuais. Do mesmo modo, constatou-se que os respondentes apresentam diversas opini es e valores homofóbicos, sexistas e heterocentrados, o que revela ser o espa o escolar, onde se encontram esses jovens n o heterossexuais, bastante carregado de posicionamentos discursivos discriminatórios. Conclui-se que a quest o do suicídio é uma problemática de saúde pública e que a popula o de jovens n o heterossexuais necessita de abordagens específicas para a preven o e de aten o relativas a essa conduta. This survey, which had as the target population adolescents aged between 12 and 20 years living in three municipalities in S o Paulo, sought to investigate the associations between sexual orientation and ideation and suicide attempts. Confirming international research findings, it is showed that non-heterosexuals are more likely to attempt and think about suicide, compared to heterosexuals. However, we found that among the group of teenagers who assumed to be non-heterosexuals, the most vulnerable are those who define themselves as bisexual and "other", which constitute the group of people less assumed, among non-heterosexuals. Similarly, it was found that the respondents have different homophobic, sexist and heterocentric opinions and values, which turn out to be the school environment, where these young non-heterosexual study, loaded with enough discriminatory discursive positions. We conclude that the issue of suicide is a public health problem and that the population of young non-heterosexual needs specific approaches for prevention and care in respect to this conduct.
Validity of the Community Periodontal Index of Treatment Needs' (CPITN) for population periodontitis screening
Bassani Diego Garcia,Silva Carina Maciel da,Oppermann Rui Vicente
Cadernos de Saúde Pública , 2006,
Abstract: The aim of the present study was to validate two versions of CPITN for periodontitis diagnosis. A sample of 400 individuals underwent full mouth periodontal examination including Clinical Attachment Loss, Periodontal Pocket Depth, and Sub-gingival Calculus. Full and partial CPITN versions were derived from this exam (gold standard). Contingency tables were constructed and operational characteristics obtained, as well as ROC curves. The results show 58% sensitivity for full CPITN and 80.6% specificity. Positive and negative predictive values were 87% and 46.3%, respectively. According to the test, estimated periodontitis prevalence was 46%, while the figure obtained with the gold standard was 69%. The partial version of the CPITN showed 50% sensitivity and 87.1% specificity. Positive and negative predictive values were 89.6% and 43.9%, respectively. Estimated periodontitis prevalence, through partial CPITN, was 30.5%. Adjusted global agreement (kappa) for partial and full CPITN was 0.32 and 0.29, respectively. Both CPITN versions disagreed significantly with gold standard results (chi-square p < 0.001). As a conclusion, both total and partial CPITN failed to reflect the real periodontal status of the sample.
The effect of nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) on nitrifying organism populations under in vitro conditions  [PDF]
David Beltran-Rendon, Kenne Rico-Fragozo, Lina Farfan-Caceres, Hermann Restrepo-Diaz, Lilliana Hoyos-Carvajal
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.23027
Abstract: The application of nitrification inhibitors is a technique to reduce the nitrate concentration on leachates that delay ammonium oxidation by reducing the activity of ammonium oxidizing bacteria in soils. Two experiments were carried out in order to estimate the influence of DMPP on the population of ammonium oxidization bacteria under in vitro conditions. In both experiments, three treatments were established. The treatments were the following: a) ammonium oxidization bacteria established in a growing media without fertilizers, b) ammonium oxidization bacteria established in a growing media with Urea, and c) ammonium oxidization bacteria established in a growing media with DMPP. Results obtained showed that the population of the ammonia oxidizing bacteria diminished in the DMPP treatment as compared with the urea and control treatments. In conclusion, DMMP influences on ammonium oxidization bacteria activity being a useful tool in fertilizers strategies to reduce the contamination by nitrates in groundwater.
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