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Search Results: 1 - 10 of 23926 matches for " Mariana Pereira "
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Factorization of simple modules for certain pointed Hopf algebras
Mariana Pereira
Mathematics , 2007,
Abstract: We study the representations of two types of pointed Hopf algebras: restricted two-parameter quantum groups, and the Drinfel'd doubles of rank one pointed Hopf algebras of nilpotent type. We study, in particular, under what conditions a simple module can be factored as the tensor product of a one dimensional module with a module that is naturally a module for the quotient by central group-like elements.
Processos migratórios na fronteira Brasil-Guiana
Pereira, Mariana Cunha;
Estudos Avan?ados , 2006, DOI: 10.1590/S0103-40142006000200016
Abstract: this text discusses the migratory processes that characterize the brazilian-guyanese border, and lists the historical, social, and cultural aspects of the frontier cities and of the local lives of ethnic groups that experience continuous or permanent dislocation, here understood as migration.
As arquitecturas do vinho de um porto monofuncional
Mariana Abrunhosa Pereira
Revista da Faculdade de Letras : Historia , 2008,
Abstract: This paper proposes a study of the Gaia trading centre, based on the importance of the Port Wine cellars in shaping the urban zone of the riverside area. The research focuses on the different types of cellars and their potential use for other activities, thus maintaining the identity of the area. Cellars could and should continue as structures dedicated to wine, but with different functions, since they are a part of an centuries-old port that is no longer monofunctional nor can it be so in the future.
Reconstru es identitarias em sociedades plurais: os povos da fronteira Brasil – Guiana / Reconstructions identity in plural societies: the people of the border Brazil – Guyana
Mariana Cunha Pereira
Reflex?o & A??o , 2010,
Abstract: As reconstru es identitárias que vem ocorrendo nas Américas est o interligadas com o fen meno dos estados-nac o, uma vez que estes s o conseqüências dos processos de coloniza o que dominaram povos e desintegrou culturas. A quest o nacional iniciada no mundo colonial americano desde o século XVIII com os movimentos deindependência, para a América Latina se configura de modo contraditório posto que tais estados-na o passaram a ser a configura o do poder daqueles que deram continuidade aos interesses e prestígios do poder colonial. O que significou para os povos dominados - índios e negros - a permanência da colonialidade. Neste artigo pretende-se estudar como esses povos que apresentam suas reconstru es identitárias nesse movimento contra-hegemonico na regi o fronteiri a do Brasil com a Guiana. Pretende-se aqui estudar com base nas categorias de identidade, cultura e nacioanalidades. Abstract The reconstruction of identities that is taking place in the Americas is interconnected with the phenomenon of the Nation-State, for they are the consequences of colonization processes that have dominated peoples and disintegrated cultures. The national question - which began in the American colonial world as of the 1800’sindependence movements in Latin America – has been articulated with contradictions. The resulting Nation-States took on the configuration of power of those who continued to pursue the same set of interests and privileges of the colonial power. For those under domination – native and black people – this meant the continuation of colonialism.This paper will investigate the ways through which these peoples have reconstructed their identities within a counter-hegemonic movement in the Brazilian and Guiana frontier. My goal is to study culture and nationalities based on categories of identity.
El taller de escritura en posgrado: Representaciones sociales e interacción entre pares
Pereira,Cecilia; di Stefano,Mariana;
Revista signos , 2007, DOI: 10.4067/S0718-09342007000200007
Abstract: the present article shows a collection of experiences carried out in the context of a thesis writing workshop and proposes guidelines for a writing didactics at a postgraduate level. the experiences allow highlighting, in the frst place, the importance of theoretical conceptualization on different aspects of the writing practice that facilitate the construction of guiding criteria for production. in this respect, we highlight the incidence of the work done with the writer’s social representations regarding the appropriation of such criteria. in the second place, due to the recognition of the value of collaborative and presential work among pairs and experts at postgraduate level, the carried out experiences allow establishing some conditions for the occurrence of a critical and productive interchange, typical of exploratory conversation
El taller de escritura en posgrado: Representaciones sociales e interacción entre pares Writing workshops in postgraduate students: Social representations and peer interactions
Cecilia Pereira,Mariana di Stefano
Revista Signos , 2007,
Abstract: El presente artículo1 muestra experiencias desarrolladas en el contexto de un taller de escritura de tesis y propone pautas para una didáctica de la escritura en el nivel de posgrado2. Las experiencias permiten destacar, en primer lugar, la importancia de la conceptualización teórica de distintos aspectos de la práctica de la escritura que facilitan la construcción de criterios orientadores para la producción. Al respecto, se pone en relieve la incidencia del trabajo con las representaciones sociales del escritor para la apropiación de dichos criterios. En segundo lugar, a partir de reconocer el valor del trabajo colaborativo y presencial entre pares y con expertos en el nivel de posgrado, las experiencias desarrolladas permiten establecer algunas condiciones para que se produzca un intercambio crítico y productivo, propio de la conversación exploratoria The present article shows a collection of experiences carried out in the context of a thesis writing workshop and proposes guidelines for a writing didactics at a postgraduate level. The experiences allow highlighting, in the frst place, the importance of theoretical conceptualization on different aspects of the writing practice that facilitate the construction of guiding criteria for production. In this respect, we highlight the incidence of the work done with the writer’s social representations regarding the appropriation of such criteria. In the second place, due to the recognition of the value of collaborative and presential work among pairs and experts at postgraduate level, the carried out experiences allow establishing some conditions for the occurrence of a critical and productive interchange, typical of exploratory conversation
Searching for the Lost Ostium: A Morphometric Analysis of the Ureteral Ostia Distribution in Normal and Thickened Bladders and Its Applications in Endourology  [PDF]
Mariana Greco, Paula Marsillac, Julia Vieira, Mario Brito, Andre Saud, Rafael Prinz, Joao Pereira-Correia
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.33028
Abstract:

Introduction: The ureteral ostia may not be easily identified in urological endoscopic procedures, leading to an incomplete diagnosis of urinary tract diseases or a predisposition to iatrogenic lesions. The purpose of our study is to evaluate the anatomical distribution of ureteralostia in normal bladders and those with thickened walls. Materials and Methods: We dissected 30 vesical-prostate blocks from human cadavers and identified the ostia of the bladder trigone. A computerized morphometric analysis was performed to measure the thickness of the detrusor muscle, the distances between the ureteral ostia themselves and the distances between each ureteral ostium (left—LUO and right—RUO) and the internal urethral ostium (IUO). The angle formed between the IUO and LUO/RUO was also recorded as well as the volume of the prostates. Results: Fifteen bladders with a non-thickened detrusor (<5 mm) as well as 15 bladders with muscular thickening (>6 mm) were identified. The average prostatic volume of the dissected blocks was 23.7 cm3. The distance between ureteral ostia, the distance from IUO to LUO, the distance from IUO to RUO and the angle formed between IUO and LUO/RUO in normal and thickened bladder were, respectively, 1.9 cm/2.2 cm (p = 0.09), 1.6 cm/1.6 cm (p = 0.82), 1.6 cm/1.7 cm (p = 0.79) and 77/91 (p = 0.17). Conclusions: Our study shows that there is no significant difference in the position of bladder ostia in healthy and thickened bladders. We believe that our findings may facilitate locating the ureteral orifices in situations where endoscopic identification is difficult.

Impact of a Non-Saccharomyces Yeast Isolated in the Equatorial Region in the Acceptance of Wine Aroma  [PDF]
Mariana Oliveira Assis, Adriana Pereira Coelho Santos, Carlos Augusto Rosa, Maria Eugênia de Oliveira Mamede
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.59086
Abstract:

The aim of this work was to isolate and identify the yeasts prevalent in fresh grapes cultivated in the “São Francisco Valley” region (Brazil), as well as evaluating the cell growth of these indigenous yeasts during the fermentation of grape musts and their contribution to the improvement of wine aroma. The Chenin Blanc grape must fermented by H. opuntiae presented higher acceptance means at the three points analyzed (6.74, 6.78 and 7.30) and in the fermentation carried out by the yeasts H. opuntiae and S. cerevisiae, the highest mean acceptance (7.22) was observed after 120 hours, with no statistical difference from the sample fermented by H. opuntiae alone. Since these samples that showed higher acceptance means also receiving higher scores for purchasing intention, corresponding to the concepts of “definitely would buy” and “probably would buy”. The present study suggests that the fermentations of grape musts carried out by the yeast H. opuntiae and mixed cultures of H. opuntiae and Saccharomyces cerevisiae, positively influenced the sensory qualities of the wines and showed greater potential to increase the aroma of the musts and to develop specific wine styles.

Expression Analysis of Two Genes Coding for Trehalose-6-Phosphate Synthase (TPS), in Sugarcane (Saccharum spp.) under Water Stress  [PDF]
Nilson Nicolau Junior, Mariana Sant’Anna Pereira Nicolau, Luana Jandhy Mantovanini, Sonia Marli Zingaretti
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A3011
Abstract:

The accumulation of trehalose (α-D-glucopyranosyl-[1,1]-α-D-glucopyranoside), a sugar with osmoprotectant properties, is very common in microorganisms, invertebrates and in resurrection plants. However, in the majority of higher plants, it is found in trace amounts. Trehalose is synthesized from the UDP-glucose and glucose-6-phosphate in a two-step process with two enzymes, trehalose-6-phosphate synthase or TPS (EC 2.4.1.15 and EC 2.4.1.36) and trehalose-6-phosphate phosphatase or TPP (EC 3.1.3.12). The trehalose-6-phosphate synthase and its product of the trehalose-6-phosphate (T6P) are probable signaling molecules in the carbohydrate metabolism, contributing to enhancing the plants tolerance to water stress. Water scarcity is one of the most important factors that influence productivity in sugarcane (Saccharum spp.) and it activates a cascade of metabolic events and necessary morphologic changes for the survival of the plant under stress. Here we show the in silico expression study of TPS in different libraries from the SUCEST project. Our results showed that the TPS genes are present in all tissues and that they are divided into two subfamilies (class I and II). It is shown that STPS1 belongs to the class I, therefore, it does not have an active phosphatase (TPP) domain, whereas, the STPS2 has an active TPP domain (class II) determined by the presence of phosphatase boxes. Expression analyses based on the semi-quantitative method of the reverse transcription polymerase chain reaction (RT-PCR) show that the STPS1 gene is up-regulated in the tolerant cultivar under stress and down-regulated in susceptible plants. The STPS2 gene does not show considerable variations in the expression levels under the same treatments. The discovery of active genes such as STPS1 and STPS2 in plants under water stress, contributes for the concerning about the cascade of responses in plants under water deficit and points out to target genes for plant breeding.

El efecto de China en el comercio internacional de América Latina
Montenegro,Claudio E; Pereira,Mariana; Soloaga,Isidro;
Estudios de economía , 2011, DOI: 10.4067/S0718-52862011000200001
Abstract: using a gravity model, this article presents an analysis of aggregate trade flows aimed at identifying china's impact on latin america's trade. the results obtained indicate that: i) china's growth in the last years implied a growing supply of exports to this market from most countries in the world, including that of latin american countries; ii) at the aggregate level, there was no indication that chinese exports to third markets were crowding out lac exports to those countries; and iii) a positive relationship between imports from china and exports to third markets was only found for the southern cone countries.
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