933 resultados para Mexican wit and humor
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Letras - FCLAS
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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In the short story “Teoria do Medalhão”, written by Machado de Assis in 1881, a zealous father decides to give good advices to his son who just turned 21 years old. Using a speech that represents the official ideology of the eighteenth century, created by the dominant hegemony, including the France of Balzac’s time, the father suggests that the son abandons his ideals, using masks and annulling his thoughts and tastes to become a true Medalhão. The dialogue that is established between both of them is surrounded by irony and humor, because the father makes an apparently wise speech, which is, actually, empty and fool, leading to think about the concepts of parody and carnavalization by Bakhtin. Besides that, when he built a story in dialogue form, Machado de Assis transfers the word to the characters, in a crossing of voices that makes us think about “embryos” of polyphony. This work aims to make a bakhtiniana reading of the machadiano short story, “Teoria do Medalhão” in opposition to the novel Le Père Goriot by Balzac.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Lamb Bright Saviors begins as an apocalyptically inclined itinerant preacher staggers across the Nebraska prairie. With his young assistant, Mady, in tow hauling a wagon stacked with bibles, it’s not long before the preacher finds he’s come to the final fulfillment of his self-proclaimed life’s work: to die in front of a group of strangers. Odd as his own end-of-days might be, the lives and struggles of the strangers attending this deathbed scene are even odder. As the dying preacher unleashes a barrage of hallucinatory ramblings and rantings in the hope of imparting wisdom, each ragtag member of this unlikely congregation must reckon with his or her own dark past. And, through it all, the irrepressible Mady lends the preacher’s strange performance a surprising and unforgettable dignity and humor.
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Analysis of recurrent events has been widely discussed in medical, health services, insurance, and engineering areas in recent years. This research proposes to use a nonhomogeneous Yule process with the proportional intensity assumption to model the hazard function on recurrent events data and the associated risk factors. This method assumes that repeated events occur for each individual, with given covariates, according to a nonhomogeneous Yule process with intensity function λx(t) = λ 0(t) · exp( x′β). One of the advantages of using a non-homogeneous Yule process for recurrent events is that it assumes that the recurrent rate is proportional to the number of events that occur up to time t. Maximum likelihood estimation is used to provide estimates of the parameters in the model, and a generalized scoring iterative procedure is applied in numerical computation. ^ Model comparisons between the proposed method and other existing recurrent models are addressed by simulation. One example concerning recurrent myocardial infarction events compared between two distinct populations, Mexican-American and Non-Hispanic Whites in the Corpus Christi Heart Project is examined. ^
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Study purpose. Genetic advances are significantly impacting healthcare, yet recent studies of ethnic group participation in genetic services demonstrate low utilization rates by Latinos. Limited genetic knowledge is a major barrier. The purpose of this study was to field test items in a Spanish-language instrument that will be used to measure genetic knowledge relevant to type 2 diabetes among members of the ethnically heterogeneous U.S. Latino community. Accurate genetic knowledge measurement can provide the foundation for interventions to enhance genetic service utilization. ^ Design. Three waves of cognitive interviews were conducted in Spanish to field test 44 instrument items Thirty-six Latinos, with 12 persons representative of Mexican, Central and South American, and Cuban heritage participated, including 7 males and 29 females between 22 and 60 years of age; 17 participants had 12 years or less of education. ^ Methods. Text narratives from transcriptions of audiotaped interviews were qualitatively analyzed using a coding strategy to indicate potential sources of response error. Through an iterative process of instrument refinement, codes that emerged from the data were used to guide item revisions at the conclusion of each phase; revised items were examined in subsequent interview waves. ^ Results. Inter-cultural and cross-cultural themes associated with difficulties in interpretation and grammatical structuring of items were identified; difficulties associated with comprehension reflected variations in educational level. Of the original 44 items, 32 were retained, 89% of which were revised. Six additional items reflective of cultural knowledge were constructed, resulting in a 38-item instrument. ^ Conclusions. Use of cognitive interviewing provided a valuable tool for detecting both potential sources of response error and cultural variations in these sources. Analysis of interview data guided successive instrument revisions leading to improved item interpretability and comprehension. Although testing in a larger sample will be essential to test validity and reliability, the outcome of field testing suggests initial content validity of a Spanish-language instrument to measure genetic knowledge relative to type 2 diabetes. ^ Keywords. Latinos, genetic knowledge, instrument development, cognitive interviewing ^
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Significant racial/ethnic differences exist in prevalence of hypertension (HTN) and non-insulin dependent diabetes mellitus (NIDDM). Hypertension is more common in diabetics than in non-diabetics, and an etiologic link between the two conditions has been proposed. Since there are few longitudinal studies of persons with both HTN and NIDDM, a retrospective cohort study was conducted to determine if ethnicity (Black, Hispanic (Mexican-American), and non-Hispanic White) was related to NIDDM incidence in a low-SES, multi-ethnic clinic population of diagnosed hypertensives. Two thousand nine hundred forty-one hypertensives free of NIDDM at baseline were followed for up to 10 years. Mean baseline age was 56 $\pm$ 12 years, M:F percent was 33:67, and Black:Hispanic:White percent was 63:17:20. There were 236 incident cases of NIDDM. In Cox proportional hazards analysis, the risk of developing NIDDM over 10 years was not related to ethnicity after controlling for significant covariates, including age, baseline blood glucose and body mass index (adjusted RR for Blacks compared to Whites =.82, 95 percent CI =.57-1.18; adjusted RR for Hispanics compared to Whites =.84, 95 percent CI =.51-1.38). This result contrasts with the increased risk of NIDDM among Blacks and Hispanics compared to Whites found in the general population. The study suggests that a diagnosis of hypertension equalizes the risk of developing NIDDM among the three ethnic groups. ^
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La presencia de arsénico (As) en suelos permite su migración hacia cultivos como el garbanzo (Cicer arietinum L.). En este trabajo se comparan contenidos de As en tres suelos de dos estados de la República Mexicana, y su acumulación en C. arietinum L. Los suelos resultaron moderadamente alcalinos, no salinos, reductores intermedios y con potenciales zeta (pZ) que indican suspensiones coloidales moderadamente estables. Con moderados contenidos de humedad y texturas franco- arcillosas, densidad aparente, capacidad de campo, agregados estables y capacidad de intercambio catiónico, significativamente diferentes y semejantes en velocidad de infiltración y espesor del horizonte A. En materia orgánica, carbono y nitrógeno son significativamente diferentes y con bajos contenidos. Existen diferencias importantes entre semillas de C. arietinum L. certificadas o no en su capacidad de germinación y desarrollo de raíces. El efecto genotóxico del As en raíces de C. arietinum L. se apreció por inducción de micronúcleos, reducción de 2,8 veces la división celular de muestras tratadas con agua con As, respecto de muestras control. Se apreció incremento de As de 9,5 veces en plántulas germinadas en suelo de El Salitre, que en suelo de Bella Vista, indicativo de migración del As. La suma de efectos de concentración de As en suelos y agua se incrementa 15,3 veces. Entre suelos de Bella Vista y Querétaro la correlación fue 2,9 veces mayor. En controles positivos los IBAs resultan 3 veces mayores que en las pruebas experimentales.
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Study sites. Samples of surface water were taken from 4 coastal lagoons on the Yucatan Peninsula in Mexico: Celestun (20° 45' N - 90° 22' W), Chelem (21° 15' N - 89° 45' W), Rosada Lagoon (21º 19' N - 89º 19' W), and Sabancuy Estuary (18° 58' N - 91° 12' W). The sampling was performed from august to October of 2011 (Chelem 08/24; Laguna Rosada 09/06; Celestún 09/28; Sabancuy 10/25). The sampling was random without replacement and 10 samples of surface water were collected along a transect parallel to the coastal axis. Samples were deposited in sterile plastic bottles and conserved in refrigeration at 4°C. All samples were processed within 24 hours after sampling. According to the Mexican laws and regulations no permissions are required to obtain water and sediment samples from open public areas. Analysis of environmental and physicochemical parameters. Determinations of the environmental parameters were performed with a Hach 5465000 model 156 multi-parameter measuring instrument. The Lorenzen method was used to determine chlorophyll-a (21) with 90% acetone and the concentration was calculated according to the formula: Chla= 27.63 (OD665o - OD665a)(VA)/VM x L Where, OD665o: absorbance at 665 nm before acidification; OD665a: absorbance at 665 nm after acidification; VA: volume (ml) of acetone for extraction; VM: volume (ml) of filtered water; L: length (cm) of the photometric cell. Determinations of the physicochemical parameters (silicates, phosphates, nitrates, nitrites and ammonia) were performed using the spectrophotometric techniques described and modified by Strickland and Parsons (1972).
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This paper presents the results of the analysis focused on scientific-technological KT in four Mexican firms and carried out by the case study approach. The analysis highlights the use of KT mechanisms as a means to obtain scientific-technological knowledge, learning, building S&T capabilities, and achieve the results of the R&D and innovation by firms.
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La cancrosis o chancro bacteriano de los cítricos (CBC) causada por Xanthomonas citri subsp. citri (Xcc) y X. fuscans subsp. aurantifolii, afecta a un gran número de especies dentro de la familia de las rutáceas, especialmente cítricos. Esta enfermedad produce graves pérdidas económicas allí donde está presente, principalmente porque la comercialización de cítricos desde las zonas afectadas hacía zonas libres de cancrosis, está sujeta a fuertes medidas cuarentenarias. La cancrosis se encuentra distribuida a nivel mundial pero no se ha localizado ni en la Unión Europea ni en ningún área del Mediterráneo. Se han descrito tres tipos de cancrosis en función de la gama de huésped y de las características fenotípicas y genotípicas de las bacterias que las producen. La más extendida es la cancrosis tipo A producida por Xcc, dentro de la cual se distinguen los subtipos Aw y A*, originarios de Florida y Sudeste Asiático, respectivamente, que de forma natural solo son capaces de producir enfermedad en lima mejicana. En este trabajo se presentan estudios sobre mecanismos implicados en las primeras etapas de la infección, como la quimiotaxis y formación de biopelículas, en la cancrosis de los cítricos. La quimiotaxis es el proceso por el cual las bacterias se dirigen hacia zonas favorables para su supervivencia y desarrollo. Los perfiles quimiotácticos obtenidos frente a distintas fuentes de carbono, así como los estudios en relación al contenido de proteínas aceptoras de grupos metilo (MCPs), permitieron agrupar a las cepas de Xanthomonas estudiadas en este trabajo, de acuerdo a la enfermedad producida y a su gama de huésped. Todas las cepas mostraron quimiotaxis positiva frente a extractos de hoja y apoplasto de diferentes especies, sin embargo, Xcc 306, X. alfalfae subsp. citrumelonis (Xac) y X. campestris pv. campestris (Xc) manifestaron respuestas más específicas frente a extractos de apoplasto de hojas de naranjo dulce, lima y col china, respectivamente. Dicho resultado nos permite asociar el mecanismo de quimiotaxis con la capacidad de las cepas de Xanthomonas para colonizar estos huéspedes de forma específica. Las cepas estudiadas fueron capaces de realizar movimiento tipo swimming, twitching y sliding en distintos medios, siendo el movimiento swimming el único en el que se encontraron diferencias entre las cepas de Xcc con distinta gama de huésped. En este trabajo se ha estudiado además la formación de biopelículas en superficies bióticas y abióticas, un mecanismo importante tanto para la supervivencia en superficie vegetal como para el desarrollo de la infección. Las cepas de Xanthomonas estudiadas fueron capaces de formar biopelículas in vitro, siendo mayor en un medio que simula el apoplasto y que contiene una baja concentración de nutrientes en comparación con medios que contenían alta concentración de nutrientes. La formación de biopelículas en superficie vegetal se encontró relacionada, en las cepas patógenas de cítricos, con la capacidad para infectar un tejido o huésped determinado. Se han caracterizado algunos de los componentes de la matriz extracelular producida por Xcc, que compone hasta un 90% de las bipoelículas. Entre ellos destaca el ADN extracelular, que tiene un papel como adhesina en las primeras etapas de formación de biopelículas y estructural en biopelículas maduras. Además, se han identificado el pilus tipo IV como componente importante en las biopelículas, que también participa en motilidad. Finalmente, se han realizado estudios sobre la expresión de genes implicados en motilidad bacteriana y formación de biopelículas que han confirmado las diferencias existentes entre cepas de Xcc de amplia y limitada gama de huésped, así como el papel que juegan elementos como el pilus tipo IV o el flagelo en estos procesos. ABSTRACT Xanthomonas citri subsp. citri (Xcc) and X. fuscans subsp. aurantifolii are the causal agents of Citrus Bacterial Canker (CBC) which is one of the most important citrus diseases. CBC affects all Citrus species as well as other species from Rutaceae family. CBC produces strong economic losses; furthermore the commercialization of plants and fruits is restricted from infested to citrus canker free areas. The disease is worldwide distributed in tropical and subtropical areas, however it is not present in the European Union. Three types of CBC have been described according to the host range and phenotypic and genotypic characteristics. CBC type A caused by Xcc is he widest distributed. Within CBC A type two subtypes Aw and A* were described from Florida and Iran respectively, both infecting only Mexican lime. Herein mechanisms connected to early events in the citrus bacterial canker disease such as chemotaxis and biofilm formation, were studied. Chemotaxis allows bacteria to move towards the more suitable environments for its survival, host colonization and infection. Studies performed on citrus pathogenic Xanthomonas and X. campestris pv. campestris (Xc), a crucifer pathogen, have shown different chemotactic profiles towards carbon compound as well as different MCPs profile, which clustered strains according to host range and disease caused. Every strain showed positive chemotaxis toward leaf extracts and apoplastic fluids from sweet orange, Mexican lime and Chinese cabbage leaves. However, a more specific response was found for strains Xcc 306, X. alfalfae subsp. citrumelonis and Xc towards sweet orange, Mexican lime and Chinese cabbage apoplastic fluids, respectively. These results relate chemotaxis with the higher ability of those strains to specifically colonize their proper host. Xanthomonas strains studied were able to perform swimming, sliding and twitching motilities. The ability to swim was variable among CBC strains and seemed related to host range. Biofilm formation is an important virulence factor for Xcc because it allows a better survival onto the plant surface as well as facilitates the infection process. The studied Xanthomonas strains were able to form biofilm in vitro, on both nutrient rich and apoplast mimicking media, furthermore the biofilm formation by all the strains was higher in the apoplast mimicking media. The ability to form biofilm in planta by Xcc and Xac strains was dependent of the host and the tissue colonized. The wide host range CBC strain was able to form biofilm onto several citrus leaves and fruits, however the limited host range CBC strain produced biofilm solely onto Mexican lime leaves and fruits. Furthermore Xac strain, which solely infects leaves of young plants, was not able to develop biofilms on fruits. Some components of the extracellular matrix produced by Xcc strains have been characterized. Extracellular DNA acted as an adhesin at the very early stages of biofilm formation and as structural component of mature biofilm for citrus pathogenic Xanthomonas. Furthermore type IV pilus has been identified as a component of the extracellular matrix in biofilm and motility. Transcriptional studies of genes related with biofilm formation and motility have confirmed the differential behavior found among wide and limited host range CBC strains as well as the role of type IV pili and flagellum on those processes.
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Cosmids from the 1A3–1A10 region of the complete miniset were individually subcloned by using the vector M13 mp18. Sequences of each cosmid were assembled from about 400 DNA fragments generated from the ends of these phage subclones and merged into one 189-kb contig. About 160 ORFs identified by the CodonUse program were subjected to similarity searches. The biological functions of 80 ORFs could be assigned reliably by using the WIT and Magpie genome investigation tools. Eighty percent of these recognizable ORFs were organized in functional clusters, which simplified assignment decisions and increased the strength of the predictions. A set of 26 genes for cobalamin biosynthesis, genes for polyhydroxyalkanoic acid metabolism, DNA replication and recombination, and DNA gyrase were among those identified. Most of the ORFs lacking significant similarity with reference databases also were grouped. There are two large clusters of these ORFs, one located between 45 and 67 kb of the map, and the other between 150 and 183 kb. Nine of the loosely identified ORFs (of 15) of the first of these clusters match ORFs from phages or transposons. The other cluster also has four ORFs of possible phage origin.