Uma história do setor de psicologia social da UFMG: invenções, teorias e práticas

Esta dissertação apresenta uma narrativa sobre o Setor de Psicologia Social da Universidade Federal de Minas Gerais, pretendendo resgatar a constituição do ensino da Psicologia Social nesta Universidade e o seu desenvolvimento como teoria e prática profissional. Este estudo enfocará o período de 1964, início do Setor, até o ano de 1992, data em que foi aprovado o Mestrado em Psicologia na UFMG, momento em que vários integrantes do Setor mudaram para outros Departamentos ou Universidades, compreendendo-se assim, como momento final do grupo. Este trabalho, utiliza-se da metodologia histórica, a partir de análise de documentos e entrevistas, visando a compreensão das condições da emergência do grupo, o desenvolvimento de suas atividades práticas e teóricas, seu percurso e os motivos pelos quais este grupo não permaneceu.

Pressure support versus T-tube for weaning from mechanical ventilation in adults

BackgroundMechanical ventilation is important in caring for patients with critical illness. Clinical complications, increased mortality, and high costs of health care are associated with prolonged ventilatory support or premature discontinuation of mechanical ventilation. Weaning refers to the process of gradually or abruptly withdrawing mechanical ventilation. the weaning process begins after partial or complete resolution of the underlying pathophysiology precipitating respiratory failure and ends with weaning success (successful extubation in intubated patients or permanent withdrawal of ventilatory support in tracheostomized patients).ObjectivesTo evaluate the effectiveness and safety of two strategies, a T-tube and pressure support ventilation, for weaning adult patients with respiratory failure that required invasive mechanical ventilation for at least 24 hours, measuring weaning success and other clinically important outcomes.Search methodsWe searched the following electronic databases: Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2012, Issue 6); MEDLINE (via PubMed) (1966 to June 2012); EMBASE (January 1980 to June 2012); LILACS (1986 to June 2012); CINAHL (1982 to June 2012); SciELO (from 1997 to August 2012); thesis repository of CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior) (http://capesdw.capes.gov.br/capesdw/) (August 2012); and Current Controlled Trials (August 2012).We reran the search in December 2013. We will deal with any studies of interest when we update the review.Selection criteriaWe included randomized controlled trials (RCTs) that compared a T-tube with pressure support (PS) for the conduct of spontaneous breathing trials and as methods of gradual weaning of adult patients with respiratory failure of various aetiologies who received invasive mechanical ventilation for at least 24 hours.Data collection and analysisTwo authors extracted data and assessed the methodological quality of the included studies. Meta-analyses using the random-effects model were conducted for nine outcomes. Relative risk (RR) and mean difference (MD) or standardized mean difference (SMD) were used to estimate the treatment effect, with 95% confidence intervals (CI).Main resultsWe included nine RCTs with 1208 patients; 622 patients were randomized to a PS spontaneous breathing trial (SBT) and 586 to a T-tube SBT. the studies were classified into three categories of weaning: simple, difficult, and prolonged. Four studies placed patients in two categories of weaning. Pressure support ventilation (PSV) and a T-tube were used directly as SBTs in four studies (844 patients, 69.9% of the sample). in 186 patients (15.4%) both interventions were used along with gradual weaning from mechanical ventilation; the PS was gradually decreased, twice a day, until it was minimal and periods with a T-tube were gradually increased to two and eight hours for patients with difficult and prolonged weaning. in two studies (14.7% of patients) the PS was lowered to 2 to 4 cm H2O and 3 to 5 cm H2O based on ventilatory parameters until the minimal PS levels were reached. PS was then compared to the trial with the T-tube (TT).We identified 33 different reported outcomes in the included studies; we took 14 of them into consideration and performed meta-analyses on nine. With regard to the sequence of allocation generation, allocation concealment, selective reporting and attrition bias, no study presented a high risk of bias. We found no clear evidence of a difference between PS and TT for weaning success (RR 1.07, 95% CI 0.97 to 1.17, 9 studies, low quality of evidence), intensive care unit (ICU) mortality (RR 0.81, 95% CI 0.53 to 1.23, 5 studies, low quality of evidence), reintubation (RR 0.92, 95% CI 0.66 to 1.26, 7 studies, low quality evidence), ICU and long-term weaning unit (LWU) length of stay (MD -7.08 days, 95% CI -16.26 to 2.1, 2 studies, low quality of evidence) and pneumonia (RR 0.67, 95% CI 0.08 to 5.85, 2 studies, low quality of evidence). PS was significantly superior to the TT for successful SBTs (RR 1.09, 95% CI 1.02 to 1.17, 4 studies, moderate quality of evidence). Four studies reported on weaning duration, however we were unable to combined the study data because of differences in how the studies presented their data. One study was at high risk of other bias and four studies were at high risk for detection bias. Three studies reported that the weaning duration was shorter with PS, and in one study the duration was shorter in patients with a TT.Authors' conclusionsTo date, we have found evidence of generally low quality from studies comparing pressure support ventilation (PSV) and with a T-tube. the effects on weaning success, ICU mortality, reintubation, ICU and LWU length of stay, and pneumonia were imprecise. However, PSV was more effective than a T-tube for successful spontaneous breathing trials (SBTs) among patients with simple weaning. Based on the findings of single trials, three studies presented a shorter weaning duration in the group undergoing PS SBT, however a fourth study found a shorter weaning duration with a T-tube.

Effectiveness and safety of cryotherapy after arthroscopic anterior cruciate ligament reconstruction. A systematic review of the literature

Cryotherapy is widely used in rehabilitation; however, its effectiveness after anterior cruciate ligament (ACL) reconstruction remains uncertain. To investigate the effectiveness and safety of cryotherapy following ACL reconstruction through a systematic review, randomized and quasi-randomized clinical trials were searched in the databases: MEDLINE, EMBASE, CENTRAL PEDro, SportDiscus, CINAHL, LILACS (June 2013). the primary outcomes measures were pain, edema and adverse events; the secondary outcomes were knee function, analgesic medication use, range of motion, blood loss, hospital stay, quality of life and patient satisfaction. the methodological quality of studies was evaluated using the Cochrane Collaboration risk-of-bias tool. Ten trials (a total of 573 patients) were included. Results of meta-analysis showed that the use of cold compression devices produced a significant reduction in pain scores 48 h after surgery (p < 0.00001), compared to no cryotherapy. the risk for adverse events did not differ between patients receiving cryotherapy versus no treatment (p = 1.00). the limited evidence currently available is insufficient to draw definitive conclusions on the effectiveness of cryotherapy for other outcomes. There is a need for well designed, good quality randomized trials to answer other questions related to this intervention and increase the precision of future systematic reviews. (C) 2014 Elsevier B.V. All rights reserved.

À procura da identidade de Heinz : um modelo de compreensão da motivação moral

RESUMO: As teorias psicológicas da moralidade dividem-se na conceptualização da motivação moral, o tema desta dissertação. Os modelos construtivistas, apoiados na epistemologia genética, privilegiam a cognição como factor determinante mas, as teorias que enfatizam o funcionamento individual admitem que as emoções e a identidade interferem na tendência de cada pessoa agir moralmente. Particularmente apoiados na segunda perspectiva, testámos um modelo preditor da motivação moral com três variáveis, identidade, identidade moral e integridade, todas avaliadas por medidas psicométricas, em duas amostras. A primeira era composta por 320 estudantes do 12º ano de uma escola do concelho de Lisboa, com idades compreendidas entre 18 e 20 anos (M=18,22; Dp=0,49), 108 masculinos e 194 femininos e a segunda era composta por 174 sujeitos, estudantes finalistas de cursos profissionais de uma escola do concelho de Lisboa frequentada por alunos provenientes de ambientes sociais caracterizados pelo stresse sócio-económico e familiar, e até, em bastantes casos, que já tinham participado em actos ilegais relacionados com furto, vandalismo, tráfico de drogas, e agressões, com idades compreendidas entre 18 e 22 anos (M=18,98; Dp=1,075), 104 masculinos e 70 femininos. A primeira amostra foi considerada normativa e a segunda de risco psicossocial. Para avaliar a motivação moral foi construída uma medida que incluiu dois aspectos: a consciência moral, relativa à avaliação objectiva e subjectiva que os indivíduos fazem das situações morais que através de processos de análise de conteúdo foi distinguida em três categorias exclusivas: não transgressão, transgressão relativizada e transgressão; e a autoatribuição de emoções que indica a probabilidade objectiva dos indivíduos cometerem acções morais. Foi verificada a existência de diferenças individuais em ambas as medidas da motivação moral e, também, a existência de diferenças na atribuição de emoções em função da consciência moral: os sujeitos da categoria transgressão apresentaram atribuições mais negativas do que os sujeitos de transgressão relativizada e estes, por sua vez, apresentaram atribuições mais negativas que os sujeitos da categoria não transgressão. Estes resultados confirmam o papel da identidade na motivação moral. A análise da predição confirmou que a integridade, a identidade e a identidade moral, em ordem decrescente de capacidade explicativa, constituem factores preditores tanto da consciência moral como da auto-atribuição de emoções. ABSTRACT: Moral motivation, the subject of this thesis, is differently viewed by several psychological perspectives. Constructivist models supported by genetic epistemology define cognition as the determinant factor while theories that emphasize individual functioning admit that emotions and identity have a central role in the way that persons could morally act. Particularly supported in this second approach we tested a predictive model of moral motivation with three variables, identity, moral identity and integrity, all evaluated by psychometric scales, in two samples. The first sample had 320 graduate high school students with age between 18 and 20 (M=18,22; SD=0,49), 108 male and 194 female and the second sample had 174 graduate students of vocational courses in high school of a risk social and familiar environment, many of them had already done illegal acts such as stealing, vandalism, drug traffic and aggressions; they had ages between 18 and 22 (M=18,98; SD=1,08), 104 male and 70 female. The first sample was considered normative and the second one was classified as psychosocial risk. To evaluate moral motivation we developed a measure that assesses two aspects: moral conscience, who includes both objective and subjective evaluation of moral situations that was distinguished in three exclusive categories by procedures of content analysis: non-transgression, justifiable transgression and transgression; and self-attribution of emotion that indicates the likelihood of committing moral actions. We observed individual differences in both measurements of moral motivation and also verified differences in emotional attribution on the basis of moral conscience: the individuals of transgression category presented more negative attributions than those of justifiable transgression and in turn the latter presented more negative attributions than individuals of non-transgression category. These results confirm the role of identity in moral motivation. The predictor analysis confirmed integrity, identity and moral identity, in descending order of explanatory power, as predictive variables of moral consciousness and self-attribution of emotions.

Estratégias de resolução de conflitos em adolescentes angolanos e portugueses

Pretendemos estudar situações de conflito interpessoal e sócio-moral e comparar as estratégias de resolução que são escolhidas por adolescentes de contextos culturais diferentes. Participaram no estudo 89 adolescentes, 44 portugueses e 45 angolanos, com idades compreendidas entre os 14 e os 16 anos, distribuídos de forma equivalente pelos dois géneros. Foram construídos quatro dilemas que configuram situações de conflito interpessoal e moral habituais entre adolescentes (humilhação, inveja, rivalidade entre grupos e traição amorosa) e foram utilizadas quatro medidas, atribuição de comportamento e de emoção, perceção de ganhos e antecipação de custos. Os resultados revelaram que a escolha de estratégias de resolução de conflitos interpessoais (agressão física, agressão verbal, indiferença, negociação e outras) é insensível ao género, mas varia inter-medidas nas histórias de inveja e de traição, varia com o conteúdo sócio-moral das situações, sobretudo entre a história de traição amorosa e as outras histórias, e varia inter-culturas também para a história de traição, onde se verificam diferenças estatísticas nas três medidas. Os resultados mostram ainda que os adolescentes têm dificuldade em antecipar os custos associados às estratégias de resolução de conflitos interpessoais, pois optam maioritariamente por não responder a esta questão.

Effect of blood contamination on the shear bond strength at resin/dentin interface in primary teeth

Purpose: To assess in vitro the shear bond strength at the resin/dentin interface in primary teeth after contamination with fresh human blood. Methods: 75 crowns of primary molars were embedded in acrylic resin and mechanically ground to expose a flat dentin surface. The specimens were randomly assigned to five groups (n=15), according to the surface treatment. Group I (control) had no blood contamination. The other groups were blood-contaminated and subjected to different post-contamination protocols: in Group 2, the surfaces were rinsed with water; in Group 3, the surfaces were air-dried; in Group 4, the surfaces were rinsed and air-dried; and in Group 5, no post-contamination treatment was done. In all groups, a 3-mm dentin bonding site was demarcated, Single Bond adhesive system was applied and resin composite cylinders were bonded. After 24 hours in distilled water, shear bond strength was tested at a crosshead speed of 0.5 mm/minute. Results: Means (in MPa) were: Group 1: 7.1 (+/- 4.2); Group 2: 4.0 (+/- 1.8); Group 3: 0.9 (+/- 0.7); Group 4: 3.9 (+/- 2.2) and Group 5: 1.3 (+/- 1.5). Data were analyzed statistically by the Kruskal-Wallis test at 5% significance level. Groups 2 and 4 were similar to each other (P > 0.05) and both ware similar to Group 1 (P > 0.05). These groups (2, 3 and 4) had statistically significantly higher bond strengths than Groups 3 and 5 (P < 0.05). Blood contamination negatively affected the shear bond strength to primary tooth dentin. Among the blood-contaminated groups, water-rinsed specimens had higher bond strengths than those that were exclusively air-dried or not submitted to any post-contamination protocol before adhesive application.

Immunomodulatory effects of Pteridium aquilinum on natural killer cell activity and select aspects of the cellular immune response of mice

Pteridium aquilinum (bracken fern) is one of the most common plants. Epidemiological studies have revealed a higher risk of certain types of cancers (i.e., esophageal, gastric) in people who consume bracken fern directly ( as crosiers or rhizomes) or indirectly through the consumption of milk from livestock that fed on the plant. In animals, evidence exists regarding the associations between chronic bracken fern intoxication, papilloma virus infection, and the development of carcinomas. While it is possible that some carcinogens in bracken fern could be responsible for these cancers in both humans and animals, it is equally plausible that the observed increases in cancers could be related to induction of an overall immunosuppression by the plant/its various constituents. Under the latter scenario, normal tumor surveillance responses against nascent (non-bracken-induced) cancers or responses against viral infections ( specifically those linked to induction of cancers) might be adversely impacted by continuous dietary exposure to this plant. Therefore, the overall objective of this study was to evaluate the immunomodulatory effects of bracken fern following daily ingestion of its extract by a murine host over a period of 14 ( or up to 30) days. In C57BL/6 mice administered ( by gavage) the extract, histological analyses revealed a significant reduction in splenic white pulp area. Among a variety of immune response parameters/functions assessed in these hosts and isolated cells, both delayed-type hypersensitivity (DTH) analysis and evaluation of IFN gamma. production by NK cells during T(H)1 priming were also reduced. Lastly, the innate response in these hosts-assessed by analysis of NK cell cytotoxic functionality-was also diminished. The results here clearly showed the immunosuppressive effects of P. aquilinum and that many of the functions that were modulated could contribute to the increased risk of cancer formation in exposed hosts.

Consumer traits: an investigation of influences

This study uses a hierarchical approach to build a model of the relationships between Consumer Need for Uniqueness (CNFU), Consumer Novelty Seeking (CNS), and a behavioural outcome, media consumption and information exposure. The study finds that those consumers who have a need for uniqueness are high in consumer novelty seeking tendencies. Subsequently, these consumers are found to have higher information exposure by consuming more media.

Concessões de rodovias no Brasil: reajustes e revisões de tarifas

Nosso estudo analisa os reajustes e revisões de tarifas efetuadas nos Programas de Concessões Rodoviárias à iniciativa privada efetuados no Brasil entre Novembro de 1994 a Agosto de 2000. A idéia matriz dos programas de concessões é desonerar o Tesouro, liberando recursos orçamentários para outros fins; obter em prazo curto a recuperação básica das rodovias e a médio e longo prazo a expansão da malha; apostando na competência da iniciativa privada para fazê-lo Daí se põe o problema da tarifa e de seu reajuste e revisão, prevista como uma correlação necessária e inevitável para que as rodovias concedidas ao setor privado existam independentemente do orçamento do Governo que não tem recursos suficientes para todos os investimentos necessários em infra-estrutura rodoviária.

Anti-Helicobacter pylori activity and oxidative burst inhibition by the naphthoquinone 5-methoxy-3,4-dehydroxanthomegnin from Paepalanthus latipes

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

Anti-Helicobacter pylori activity and immunostimulatory effect of extracts from Byrsonima crassa Nied. (Malpighiaceae)

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

Effect of Byrsonima crassa and Phenolic Constituents on Helicobacter pylori-Induced Neutrophils Oxidative Burst

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