O DNA, seus incríveis números e seus segredos

O DNA existe por um único motivo – criar mais DNA. Em cada célula do nosso organismo, o filamento estendido de DNA chega a ter cerca de 2 metros. Se você imaginar que em nosso corpo há perto de 10 trilhões de células, você terá uma ideia da enormidade de DNA que nós possuímos. Assim, se todo o seu DNA fosse emendado em um único filamento, seria tão comprido que se estenderia da Terra à Lua, ida e volta, várias vezes. Pudera, você é proprietário de 20 milhões de quilômetros de DNA. Seu corpo, em suma, é uma máquina de produzir DNA e sem ele você não conseguiria viver. Mas o próprio DNA, apesar de ser considerado “a base da vida”, não está vivo. Ao contrário de qualquer outra molécula, ele é, por assim dizer, “inanimado”. Não é reativo e quimicamente inerte. Por essas razões, pode ser recuperado de restos de sangue, de sêmen, ou de pele secos há muito tempo – milhares de anos, até.

Relações de gênero e poder: a vivência de mulheres e homens sob o impacto da migração internacional. -

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Filoctetes de Sófocles: o espaço e o labor humano

This article analyses the transformations of spatial references in Sophocles’Philoctetes. As we can see, instead of being cristalized in formulas and conventions, Ancient Greek Theater has renewed itself constantly, by experiencing different ways to correlate audience and events on stage.

Lateral cephalometric diagnosis of asymmetry in Angle Class II subdivision compared to Class I and II

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Clinical and epidemiological profiles of individuals with drug-resistant tuberculosis

Drug-resistant tuberculosis (TB) is a growing global threat. Approximately 450,000 people developed multidrugresistant TB worldwide in 2012 and an estimated 170,000 people died from the disease. This paper describes the sociodemographic, clinical-epidemiological and bacteriological aspects of TB and correlates these features with the distribution of anti-TB drug resistance. Mycobacterium tuberculosis (MT) cultures and drug susceptibility testing were performed according to the BACTEC MGIT 960 method. The results demonstrated that MT strains from individuals who received treatment for TB and people who were infected with human immunodeficiency virus were more resistant to TB drugs compared to other individuals (p < 0.05). Approximately half of the individuals received supervised treatment, but most drug-resistant cases were positive for pulmonary TB and exhibited positive acid-fast bacilli smears, which are complicating factors for TB control programs. Primary healthcare is the ideal level for early disease detection, but tertiary healthcare is the most common entry point for patients into the system. These factors require special attention from healthcare managers and professionals to effectively control and monitor the spread of TB drug-resistant cases.

Adsorption of immunoglobulin Y in supermacroporous continuous cryogel with immobilized Cu2+ ions

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Characteristics of PbO-BiO1.5-GaO1.5 glasses melted in SnO2 crucibles

PbO-BiO 1.5-GaO 1.5-based glasses are good candidates for optical applications, because of some of their interesting characteristics, such as high refraction indices and high transmission in the ultraviolet (UV), visible (VIS), and infrared (IR) regions. A limited stage in the processing of these glasses is the corrosion that is caused by the melt in all currently used conventional crucibles, such as noble metals (platinum or gold) and Al 2O 3. The absorption of crucible material by the glass composition may reduce the transmission level, the cutoff in the UV-VIS, and IR regions, and the thermal stability. In this study, a SnO 2 crucible has been tested for PbO-BiO 1.5-GaO 1.5 molten glass. Optical and thermal analyses show, in some cases, advantages over the use of platinum and Al 2O 3 crucibles. A visible cutoff value of 474 nm has been measured, and a longer melting time (850°C for 4 h) results in a significant reduction of the O-H absorption band at 3.2 μm.

As configurações do amor na lírica de Nuno Júdice

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Brazilian consensus on photoprotection

Brazil is a country of continental dimensions with a large heterogeneity of climates and massive mixing of the population. Almost the entire national territory is located between the Equator and the Tropic of Capricorn, and the Earth axial tilt to the south certainly makes Brazil one of the countries of the world with greater extent of land in proximity to the sun. The Brazilian coastline, where most of its population lives, is more than 8,500 km long. Due to geographic characteristics and cultural trends, Brazilians are among the peoples with the highest annual exposure to the sun. Epidemiological data show a continuing increase in the incidence of non-melanoma and melanoma skin cancers. Photoprotection can be understood as a set of measures aimed at reducing sun exposure and at preventing the development of acute and chronic actinic damage. Due to the peculiarities of Brazilian territory and culture, it would not be advisable to replicate the concepts of photoprotection from other developed countries, places with completely different climates and populations. Thus the Brazilian Society of Dermatology has developed the Brazilian Consensus on Photoprotection, the first official document on photoprotection developed in Brazil for Brazilians, with recommendations on matters involving photoprotection.

Habilidades sociais e características pessoais em escolares de Belém

Este estudo relacionou a frequência da emissão de reação socialmente habilidosa, não-habilidosa passiva e não-habilidosa ativa às variáveis da criança (sexo, idade, condições clínicas). Participaram 57 meninos e 52 meninas, entre seis e 12 anos. O Questionário de Caracterização da Criança (QCC) levantou informações sobre sexo, idade e condições clínicas e o Inventário Multimídia de Habilidades Sociais de Crianças (IMHSC-Del Prette) avaliou as habilidades sociais, respondidos pelos cuidadores e escolares, respectivamente. Utilizou-se os testes U de Mann-Whitney, o coeficiente de correlação de Pearson e o teste t para análises dos dados. Os resultados indicaram: (a) diferenças significativas na adequação das reações habilidosas e não-habilidosas (p < 0,001); (b) aumento do repertório de habilidades sociais conforme o avançar dos anos (p < 0,001); e (c) meninas apresentaram mais frequência de habilidades sociais que meninos (p = 0,040). Não houve associações significativas entre habilidades sociais e condições clínicas (p = 0,539). Verificou-se que sexo e idade podem interferir na presença e desempenho de repertório socialmente habilidoso. Sugerem-se outras técnicas de avaliação que complementem os dados investigados e possibilitem intervenções futuras para amostras semelhantes.

Rotinas familiares de crianças com necessidades especiais em família adotiva

Objetivou-se descrever as rotinas de três famílias, que adotaram crianças com necessidades especiais, que tinham conhecimento prévio dessa condição infantil. Utilizou-se o método de Estudo de Casos Múltiplos. Os dados foram obtidos por meio de Entrevista Semiestruturada (ES), do Inventário de Rotina (IR) e do Diário de Campo (DC). Quanto às semelhanças entre os grupos familiares, identificou-se que são comuns as atividades de alimentação/higiene, descanso e lazer, envolvendo a participação dos pais, irmãs e babás, geralmente nos ambientes domésticos da família. Observou-se diferenças importantes nos padrões de atividades, companhias e ambientes onde as rotinas ocorriam. Conclui-se que as variações nas rotinas estão relacionadas às particularidades de cada criança, à estrutura e nível socioeconômico de cada família participante.

Spring 2015

In this issue: Beach House Raffle Planned "The End of the Affair" -- Dean Herring Note From the Chair: "Reflections on Reading"-- Dr. Jane J. White Membership Form

The Shaping of a New Identity: Continuation of the Transformation Process of People of Color on White University College Campuses Into "White" People of Color

“Our study will show how the pyramidal structure as a permanent feature of every aspect of American society continues to function in the same manner at institutions of higher learning.”

Lanthanum carbonate, like sevelamer-HCl, retards the progression of vascular calcification and atherosclerosis in uremic apolipoprotein E-deficient mice

Atherosclerosis and vascular calcification (VC) progression in chronic kidney disease is favored by disturbances of mineral metabolism. We compared the effect of phosphate binder lanthanum (La) carbonate with sevelamer-HCl on atherosclerosis, VC and bone structure and function in mice with chronic renal failure (CRF). Apolipoprotein E-deficient (apoE(-/-)) mice were randomized to one non-CRF and three CRF groups, fed with standard diet (one non-CRF and one CRF) or diet supplemented with either 3% lanthanum carbonate (La3%) or 3% sevelamer-HCl (Sev3%). Both La3% and Sev3% supplemented CRF mice displayed a decrease of serum phosphorus, calcification at both intimal and medial aortic sites and atherosclerosis. This was associated with a reduction of plaque Type I collagen expression by both binders and of positive nitrotyrosine staining in response to sevelamer-HCl only. Increased mineral apposition and bone formation rates in unsupplemented CRF mice were reduced by Sev3% but not by La3%. The beneficial effects of La carbonate and sevelamer-HCl on the progression of VC and atherosclerosis in CRF mice could be mainly due to a decrease in phosphate retention and likewise a reduction of arterial Type I collagen expression. The effect of La carbonate differed from that of sevelamer-HCl in that it did not appear to exert its vascular effects via changes in oxidative stress or bone remodeling in the present model.

Cardiovascular autonomic dysfunction in sickle cell anemia

Sickle cell anemia (SCA) is associated to increased cardiac output, normal heart rate (HR), abnormal QT dispersion and lower diastolic blood pressure (DBP). The mechanisms are still unknown. The objective of this study was to test the hypothesis that there is cardiovascular autonomic dysfunction (CAD) in SCA. The secondary objectives were to distinguish the roles of chronic anemia and hemoglobinopathy and to evaluate the predominance of the sympathetic or parasympathetic systems in the pathogenesis of CAD. Sixteen subjects with SCA, 13 with sickle cell trait (SCT), 13 with iron deficiency anemia (IDA), and 13 healthy volunteers (HV) were evaluated. All subjects were submitted to 24 h-electrocardiogram (24 h-ECG), plasma norepinephrine (NE) measurement before and after isometric exercise (IE), and also Valsalva maneuver (VM), diving maneuver (DV), and tilt test (TT). Baroreflex sensitivity (BRS) was also evaluated. The minimum, average and maximum HR as well as the percentage of bradycardia and tachycardia at 24-h ECG were similar in all groups. NE at baseline and after IE did not differ between groups. The SCA group showed less bradycardia at phase IV of VM, less bradycardia during DV, and also less tachycardia and lower DBP during TT. BRS for bradycardia and tachycardia reflex was decreased in the SCA and SCT groups. In conclusion, 1) there is CAD in SCA, and it is characterized by the reduction of BRS and the limitation of HR modulation mediated by the parasympathetic system; 2) cardiovascular sympathetic activity is preserved in SCA; and 3) hemoglobinopathy is the preponderant ethiopathogenic factor. (C) 2011 Elsevier B.V. All rights reserved.