Dynamics of the interaction between body fluid and Ti cp: the influence of surface functionalization in the first stages of osseointegration

INTRODUCTION: Regenerative therapies using biomaterials require accurate information on interactions between the implanted material and the human body. To improve the process of bone regeneration it is necessary to obtain a better understanding of the influence of the surfaces on the early stages of osseointegration. This work aims to investigate the dynamic interaction between simulated body fluid (SBF) and titanium surfaces (Ti cp) immediately after their first contact. METHODS: Ti cp samples were passed through physicochemical treatments after immersion in acid solution, alkaline solution and solutions containing TiO2 and Ca2+, to obtain three different surfaces. These were characterized by electron microscopy and free energy estimates. The evaluation of the interaction with SBF was performed by measuring the dynamic contact angles after contacting the surfaces. RESULTS: The effects of SBF wettability were more significant on surfaces according to high energy estimates. A comparative analysis of the three types of surfaces showed that fluid spreading was greater in samples with greater polar components, indicating that the surface nature influences interactions in the early stages of osseointegration. CONCLUSION: The results indicate the influence of polar interactions in the dynamic wettability of the SBF. It is possible that these interactions can also influence cellular viability on surfaces. Based on these results, new experiments are being designed to improve the presented methodology as a tool for the evaluation of biomaterials without the need for in vivo experiments.

The first frequency of cantilevered bars with geometric effect: a mathematical and experimental evaluation

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Invasive head and neck cutaneous squamous cell carcinoma: clinical and histopathological characteristics, frequency of local recurrence and metastasis

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

Indisciplina no contexto da disciplina escolar

This study aimed to investigate the concepts of discipline/indiscipline among teachers in the sixth year of elementary school and observe how this issue is covered by the teachers, psychological and philosophical approach, according to its various conceptions. For the analysis of disciplinary concepts and unruly, we took into consideration the context of preteen, who suffers great changes in this particular age group. The need to address the following themes, created by the fact that the issue indisciplinary is a constant problem in institutions and, thereafter, the theme was quite current in order representations (express or implied) of discipline/indiscipline among teachers. As a tool for data collection technique was used to interview the teachers of that grade. This research also tried to score, especially the teachers understand that their behavior and for disciplinary action, considering the changes in habits and attitudes students, resulting from pre-adolescence, very present in this specific age group. In general, confirmed the presence of essential individual and social representations about the concepts of discipline and indiscipline among teachers, varying according to their various cultures, religions and teaching time, so therefore they were defined their real considerations. From this research, we concluded that these teachers have a vision of traditional education, taking into consideration their personal representations and education they had in earlier time

As possíveis relações entre moralidade e perdão em crianças do primeiro ano do ensino fundamental

This research aims to show how children can learn the meaning of forgiveness in order to build their autonomy and moral . Research is essential to support teachers to work morale within the classroom with their students , so that conflicts a re minimized or even eliminated . Through Piagetian clinical method was observed and interviewed students from the first year of elementary school , trying to identify those who can take a perspective other than you r own . All this in order to inve stigate the possibility of these becoming autonomous and can measure th e consequences of their actions . To develop the moral and intellectual autonomy of the students , Piaget (1994 ) shows the importance of children to act properly by choice , not by pres sure punishments or rewards , and that they have the correct answers , not because someone showed you , but because found . Through research , we found that students are able to forgive, but often requiring that the colleague is also punished in some way. Fo r in fact the children act autonomously it is necessary that the school provides situations where they can experience the cooperation , reciprocity, mutual respect , and thus gradually build their autonomy

DNA human identification for the family rights: one year of agreement between UNESP/laboratory of paternity and public defender service in São Paulo State

The universities have realized the importance of extending their knowledge to the population through the provision of services. Thus, this paper presents the data obtained in an agreement between UNESP/Laboratory of Paternity and Public Defender Service in São Paulo State to make DNA paternity tests.

O perdão como componente moral em crianças do primeiro ano do ensino fundamental

Forgiveness may be considered a moral component to be developed along with the development of moral autonomy of individuals. This study aims to verify how 10 (ten) children from the first year of elementary school conceive the pardon and its possible relationship with their moral autonomy development. As theoretical research we have taken Piaget´s studies on human´s morality (1930; 1932) and Rique (2007, 2008, 2011) and Enright (1991, 1998) studies about forgiveness. This study was based on a qualitative research and the adopted method was the Piaget's Experimental Clinical Method. The results have shown that children perform moral reasoning when facing situations which involve the decision of forgiving someone and tend to comprehend forgiveness as forgiving someone for some performed act. We conclude by emphasizing the importance of the teacher’s mediation and intervention in moral discussions involving forgiveness, for the construction of the learners ´moral autonomy.

Professores que ensinam matemática e a inclusão escolar: algumas apreensões

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

First-year nest growth in the leaf-cutting ants Atta bisphaerica and Atta sexdens rubropilosa

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

First detection of Leishmania spp. DNA in Brazilian bats captured strictly in urban areas

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

Fluoride concentrations of milk, infant formulae, and soy-based products commercially available in Brazil

To assess the fluoride (F) content in commercially available milk formulae in Brazil and to estimate the F intake in children from this source in the first year of life. Samples of cow's milk (n = 51), infant formulae (n = 15), powdered milk (n = 13), and soy-based products (n = 4) purchased in Araçatuba (Brazil) had their F content measured using an ion-specific electrode, after hexamethyldisiloxane-facilitated diffusion. Powdered milk and infant formulae were reconstituted with deionized water, while ready-to-drink products were analyzed without any dilution. Using average infant body masses and suggested volumes of formula consumption for infants 1-12 months of age, possible F ingestion per body mass was estimated. Data were analyzed by descriptive analysis. Mean F content ranged from 0.02 to 2.52 mg/L in all samples. None of the cow's milk provided F intake higher than 0.07 mg/kg. However, two infant formulae, one powdered milk, and one soy-milk led to a daily F intake above the suggested threshold for fluorosis when reconstituted with deionized water. Assuming reconstitution of products with tap water at 0.7 ppm F, two infant formulae, five powdered milk, and four soymilks led to daily F intake ranging from 0.108 to 0.851 mg/kg. The results suggest that the consumption of some brands of infant formulae, powdered milk, and soy-based milk in the first year of age could increase the risk of dental fluorosis, reinforcing the need for periodic surveillance of the F content of foods and beverages typically consumed by young children.

Aprendendo por meio de experiências com situações problema

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Demandas de professores de física em exercício no Ensino Médio: subsídios para um processo de reestruturação de um curso de licenciatura

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O saber para praticar do jogo de handebol na Educação Física escolar: recursos avaliativos para o ensino médio

Pós-graduação em Docência para a Educação Básica - FC

O Ensino de Geometria por meio de atividades investigativas: uma experiência com alunos do primeiro ano do Ensino Médio

This qualitative nature of work was developed with the participation of a group of students enrolled in the first year of high school from a public school of the state of São Paulo, in the city of Taubaté. Their goal was to determine how students deal with geometry tasks in investigative classes. To guide this research was drawn up the following question: As students of the first year of high school express their knowledge of building triangles and quads in classes of investigative activities?. The choice of investigative nature of this activity occurred by enhancing student participation and thus generate a greater chance of it not be guided only by what the teacher wants, but by his own curiosity and using their own tools for this. In the data analysis process stands out the interest generated in students for this type of activity and posture maintained throughout the work, mobilizing their expertise to answer the questions posed