967 resultados para Cellular control mechanisms


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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In this paper, we intend to contribute to the debate about the circulation of the discourses. To do that, we analyze aspects regarding the circulation of Amway's discourse, a North-American network sales company that has been working in Brazil for a while. Precisely, we analyze the conditions of this circulation at the time it was more intensively, ie, in the 90s, when there were thousands of people in several parts of the country selling the company's products or consuming them. This study has been based on French Discourse Analysis with focus on both Michel Foucault's insights on the control mechanisms of discourse and Maingueneau's reformulated notion of discursive practice. The analysis reveals that Amway's discourse displays features of a doctrine, and, as a discursive practice, it cannot be conceived of as separated from the subjects who convey it, nor from its hierarchical organization, nor from the events that the company promotes and those which are promoted under its name. In these terms, the analysis shows how the discourse is not only a set of texts, but also concerns to the institutional network related to the social group that the enunciation of discourse presupposes and makes it possible.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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New real estate launch products and closed residential spaces, occurs with increasing frequency in Brazilian cities and are based on the assumption that there is a general increase in violence, as we address urban insecurity, which involves individual coping, and privatizing adept practices of exacerbated control mechanisms. We researched deployment and appropriation of residential spaces in middle cities of Sao Paulo (Brazil). We identify social representations of the others, blamed for insecurity growing, and analyzed from everyday life perspective. We hypothesized that new forms of production of urban space with a tendency to social and spatial fragmentation, generate new practices.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Agronomia (Produção Vegetal) - FCAV

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Information technologies have enabled new forms of interactions among individuals, and can also be found in various educational institutions. However, despite appropriating new technological tools, educational practices continue to be based on a supposed pedagogical subject conceived as a transcendent way, ignoring his emergence and his origin in a particular historical period , and the control mechanisms by which is immersed. as well. This article aims to present results of an analysis on technology and education based on the thought of philosopher Michel Foucault. We analyzed proposals and discourses found in articles in a magazine entitled Patio - Revista Pedagógica.

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Mining activities are directly related to changes in natural landscapes. With the objective of analyzing the changes imposed by the geomorphological dynamics of human action in areas of mining clay, two fragments were selected from the basin of Ribeirão Santa Gertrudes / SP, representing denudational and sedimentation processes respectively. This area is within the context of the Ceramic Pole Santa Gertrudes / SP, which besides its importance as a supplier of raw material, is characterized as the largest center of international reference in ceramic tiles on the American continent. Data was collected and analyzed from the perspective of anthropogenic geomorphology supported by general systems theory and uses techniques from evolutionary geomorphological mapping. Thus, geomorphological mapping were produced concerning three scenarios, which date from 1962, 1988 and 2006 in a scale of 1:10.000. These surveys allowed us to infer a detailed investigation of the evolution of changes in topography and hydrology, geomorphology representative of the original (1962), which has characteristics of an earlier phase of earlier existing large mining pits, and its evolution to a anthropogenic geomorphological stage, represented by active disruption scenarios dating from 1988 and 2006. The last two scenarios have analyzed changes in the dimensions of relief features when compared with the original scenario representative of geomorphology, as well as an intense reallocation of surface and subsurface materials, in which human action is highlighted by becoming responsible for sculpting the landscape through the imposition of control mechanisms to natural processes.

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The present study investigated whether postural responses are influenced by the stability constraint of a voluntary, manual task. We also examined how task constraint and first experience (the condition with which the participants started the experiment) influence the kinematic strategies used to simultaneously accomplish a postural response and a voluntary task. Twelve healthy, older adults were perturbed during standing, while holding a tray with a cylinder placed with the flat side down (low constraint, LC) or with the rolling, round side down (high constraint, HC). Central set changed according to the task constraint, as shown by a higher magnitude of both the gastrocnemius and tibialis anterior muscle activation bursts in the HC than in the LC condition. This increase in muscle activation was not reflected, however, in changes in the center of pressure or center of mass displacement. Task constraint influenced the peak shoulder flexion for the voluntary tray task but not the peak hip flexion for the postural task. In contrast, first experience influenced the peak hip flexion but not the peak shoulder flexion. These results suggest an interaction between two separate control mechanisms for automatic postural responses and voluntary stabilization tasks.

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Hek-293 cell line presents good production platform for recombinant therapeutic proteins, however little is known about the components that contribute to the cellular control of recombinant protein production. In this study, we generated a Hek-293 producing recombinant factor VIII (FVIII) and we evaluated the immunoglobulin-binding protein (BiP) and phytanoil-CoA α-hydroxylase (PAHX) expression levels which are known for diminishing FVIII production. Our analyses showed that the recombinant cell population expresses 3.1 ± 1.4 fold of BIP mRNA (P = 0.0054) and 97.8 ± 0.5 fold of PAHX mRNA (P = 0.0016) compared to nontransduced cells. The amount of these proteins was inversely correlated to the secreted FVIII. In conclusion, BIP and PAHX expression are augmented in human cells producing FVIII and they antagonize the amount of therapeutic factor VIII in the cell culture.

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The effect produced by a warning stimulus(i) (WS) in reaction time (RT) tasks is commonly attributed to a facilitation of sensorimotor mechanisms by alertness. Recently, evidence was presented that this effect is also related to a proactive inhibition of motor control mechanisms. This inhibition would hinder responding to the WS instead of the target stimulus (TS). Some studies have shown that auditory WS produce a stronger facilitatory effect than visual WS. The present study investigated whether the former WS also produces a stronger inhibitory effect than the latter WS. In one session, the RTs to a visual target in two groups of volunteers were evaluated. In a second session, subjects reacted to the visual target both with (50% of the trials) and without (50% of the trials) a WS. During trials, when subjects received a WS, one group received a visual WS and the other group was presented with an auditory WS. In the first session, the mean RTs of the two groups did not differ significantly. In the second session, the mean RT of the two groups in the presence of the WS was shorter than in their absence. The mean RT in the absence of the auditory WS was significantly longer than the mean RT in the absence of the visual WS. Mean RTs did not differ significantly between the present conditions of the visual and auditory WS. The longer RTs of the auditory WS group as opposed to the visual WS group in the WS-absent trials suggest that auditory WS exert a stronger inhibitory influence on responsivity than visual WS.

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After having covered the international regulation in the labour market and in the control mechanisms fighting the irregular and the concealed labour, the Author concentrates on the Italian system’s answers to the requests coming from the European Union. Starting from the White Book on the labour market in Italy, the problems originated by the Legislative Decree 124/2004 and, moreover, those which have affected the fight against the concealed labour are dealt with. The aim study is to verify that the juridical regulation adopted by the national lawmaker has contributed to solve the problems connected to the labour flexibility and the consequent temporary employment. The analysis of the problems has led to the conclusion that, regardless the lawmaker’s good intentions, the basic principles of the national juridical system do not allow the achievement of a full realization of the objectives. This is mainly because the lack of effective systems to protect the flexible employees often treated as temporary employees, and because of the difficulties to introduce the legal culture on which the whole system should stand.

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I linfomi primitivi cutanei riconosciuti nella classificazione della WHO/EORTC si presentano come “entità cliniche distinte” su base clinica, morfologica, immunofenotipica e molecolare. Il fenotipo linfocitario T helper CD4+ caratterizza i CTCL, ma alcune entità a prognosi aggressiva presentano un immunofenotipo citotossico CD8+. Numerosi studi di citogenetica (CGH) e gene-expression profiling (GEP) sono stati condotti negli ultimi anni sui CTCL e sono state riscontrate numerose aberrazioni cromosomiche correlate ai meccanismi di controllo del ciclo cellulare. Scopo del nostro studio è la valutazione delle alterazioni genomiche coinvolte nella tumorigenesi di alcuni CTCL aggressivi: il linfoma extranodale NK/T nasal-type, il linfoma primitivo cutaneo aggressivo epidermotropo (AECTCL) e il gruppo dei PTCL/NOS pleomorfo CD8+. Il materiale bioptico dei pazienti è stato sottoposto alla metodica dell’array-CGH per identificare le anomalie cromosomiche; in alcuni casi di AECTCL è stata applicata la GEP, che evidenzia il profilo di espressione genica delle cellule neoplastiche. I dati ottenuti sono stati valutati in modo statistico, evidenziando le alterazioni cromosomiche comuni significative di ogni entità. In CGH, sono state evidenziate alcune aberrazioni comuni fra le entità studiate, la delezione di 9p21.3, l’amplificazione di 17q, 19p13, 19q13.11-q13.32 , 12q13 e 16p13.3, che determinano la delezione dei geni CDKN2A e CDKN2B e l’attivazione del JAK/STAT signaling pathway. Altre alterazioni definiscono l’amplificazione di c-MYC (8q24) e CCND1/CDK4-6 (11q13). In particolare, sono state evidenziate numerose anomalie genomiche comuni in casi di AECTCL e PTCL/NOS pleomorfo. L’applicazione della GEP in 5 casi di AECTCL ha confermato l’alterata espressione dei geni CDKN2A, JAK3 e STAT6, che potrebbero avere un ruolo diretto nella linfomagenesi. Lo studio di un numero maggiore di casi in GEP e l’introduzione delle nuove indagini molecolari come l’analisi dei miRNA, della whole-exome e whole genome sequences consentiranno di evidenziare alterazioni molecolari correlate con la prognosi, definendo anche nuovi target terapeutici.