Resistência à seca em quatro cultivares de trigo: parâmetros fisiológicos

A resistência à seca foi estudada em quatro cultivares de trigo, dois de porte baixo: Anahuac e IAC-24 e dois de porte alto, BH-1146 e IAC-23, em dois tratamentos de irrigação: I- vasos constantemente molhados por capilaridade; II- vasos irrigados quando o potencial de água do solo atingisse, aproximadamente, -1,5 MPa. O potencial de água e o teor relativo de água das folhas foram mais elevados no tratamento precondicionado ao estresse, em relação ao irrigado por capilaridade, em todos os cultivares sob as mesmas condições de umidade do solo em ambos os estádios considerados: desenvolvimento vegetativo e reprodutivo. Embora os estômatos das plantas do tratamento submetido ao estresse permanecessem abertos a potenciais de água mais negativos que naqueles em que as plantas recebiam água constantemente, não foi possível separar genótipos mais ou menos resistentes à seca, utilizando-se a difusividade ao vapor d'água dos estômatos acoplada ao teor relativo de água e ao potencial de água das folhas.

A ideologia dos filmes utilizados na educação infantil: uma análise a partir da teoria crítica

This work has as purpose to show what are the influences of media in the education and in the shaping the thinking and understand that ideologies are present in the films used in the classroom in kindergarten. For this, I directed the discussion beginning by concepts as Ideology and its more different definitions by several thinkers over the years, the thinkers of Critical Theory of Frankfurt School, called “frankfurtians” of first and second generation of this school, also making an association between Cinema and Education, evidencing concepts involving this association as Cultural Industry, using films properly in classrooms in kindergarten, with the teacher as mediator and then discussed what amounts of movies on children's education, how they assist and deepen the knowledge developed by students in schools of infantile education. Additionally, they are exposed the different opinions about the subject Film and Education for students from kindergarten, what benefits and what disadvantages in the use of films, the different opinions on the subject. We also discuss, in this work, the ideologies present in three films produced by Walt Disney, they are Cinderella, Snow White and the Seven Dwarfs and Alice in Wonderland, relating them to how they can contribute to the development and learning students in kindergarten. I associated more as possible the previous discussions to analyze the ideologies present in these films, by summarizing these, and decomposing them through an analysis tool called frame. Finally, I completed everything that was discussed and analyzed, which students in kindergarten may develop with the use of films in schools, what they contribute, in some way, for the learning and education of students as viewers using the school as access to different cultures and the teacher as a mediator of this relationship

Evidence for dark matter in the inner Milky Way

The ubiquitous presence of dark matter in the Universe is today a central tenet in modern cosmology and astrophysics(1). Throughout the Universe, the evidence for dark matter is compelling in dwarfs, spiral galaxies, galaxy clusters as well as at cosmological scales. However, it has been historically difficult to pin down the dark matter contribution to the total mass density in the Milky Way, particularly in the innermost regions of the Galaxy and in the solar neighbourhood(2). Here we present an up-to-date compilation of Milky Way rotation curve measurements(3-13), and compare it with state-of-the-art baryonic mass distribution models(14-26). We show that current data strongly disfavour baryons as the sole contribution to the Galactic mass budget, even inside the solar circle. Our findings demonstrate the existence of dark matter in the inner Galaxy without making any assumptions about its distribution. We anticipate that this result will compel new model-independent constraints on the dark matter local density and profile, thus reducing uncertainties on direct and indirect dark matter searches, and will help reveal the structure and evolution of the Galaxy.

A unified solution to the small scale problems of the Lambda CDM model II: introducing parent-satellite interaction

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