Morfologia da micrópila e da superfície dos ovócitos de piracanjuba, Brycon orbignyanus (Osteichthyes, Characidae), sob microscopia eletrônica de varredura

This paper studied the morphology of oocytes of Brycon orbignyanus, (Osteichthyes, Characidae), through observation in Scanning Electron Microscopy (SEM). Fragments of the ovaries from adult females were collected. During the reproductive period, a hormonal induction in females was carried out to collect the oocytes after extrusion. The samples were fixed and processed for observation in SEM. Results showed that the oocytes of B. orbignyanus had a follicular epithelium formed by a single layer of cells with compressed shape, covering the whole radiatta zone that showed a smooth and regular surface with innumerable pores. The micropyle had a funnel-shaped, containing several furrows. The oocyte surface around the micropyle presented pores closer of each other than the other surface areas of radiatta zone.

Avaliação da formação do biofilme de Candida albicans sobre superfície de titânio revestida com hidroxiapatita por meio de microscopia eletrônica de varredura

In this study Candida albicans biofilm formation on the surface of commercially pure titanium (cp-Ti) coated with hydroxyapatite was observed by means of scanning electron microscope. The biofilm was formed after 45 days of incubation of the samples in liquid culture medium inoculated with fungus cells in a tube of polystyrene with screw cap and sterilized. After the biofilm removal with 10% EDTA solution was observed pitting on the surface of cp-Ti coated.

Efeito da mitomicina c no epitélio ciliar estudo experimental em coelhos com microscopia eletrônica de varredura e de transmissão

Purpose: To evaluate and correlate in the rabbit the possible changes caused by mitomycin C under the scleral flap in the ciliary epithelium with transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Methods: The eyes of 32 albino rabbits were studied and divided in 4 experimental groups. The right eye (RE) was intended for the experimental groups and the left eye (LE) for the controls. Group I (G1) was formed by 8 eyes that received 0,5 mg/ml of mitomycin C under the scleral flap and were examined after 15 days. Group II (G2) differed from G1 only in the time of the exam, after 30 days. Group III (G3) was formed by 8 eyes that received 0,2 mg/ml of mitomycin C under the scleral flap and were examined after 15 days. Group IV (G4) differed from group 3 just in the time of the exam, after 30 days. In each eye the internal ciliary epithelium were examined with TEM. Results: The following changes in the internal ciliary epithelium were observed in groups G2, G3, and G4 with TEM: discontinuous and irregular basement membrane, more irregular and electron-dense nucleous, enlargement among interdigitation, edematous mitochondria and myelin figures. These alterations were not found in all the animals of the groups. Group G 1 did not present alterations. Roughness in groups G 1, G2, G3 and G4 were observed with SEM. In groups G 1 and G2 continuity solutions were also observed. Conclusion: Mitomycin C in 0,2 mg/ml and 0,5 mg/ml concentrations caused changes in the internal ciliary epithelium 15 and 30 days after, with TEM and SEM. There was no correlation between dosage, time and with TEM and SEM.

Concepções de surdez: A visão do surdo que se comunica em língua de sinais

At this time, diverse views on deafness are present in society. Such views, in general, arecharacterized by theoretical disputes between communicative possibilities - either oral or gestural - based onthe importance of having appropriated oneself of a language code for the development of language, which isessential in the constitution of subjectivity of human beings. Thus, this study aimed to identify the conceptionsof deaf people had about their condition. To collect the data we used semi-structured interviews, applied toten participants who were deaf adult users of the Brazilian Sign Language - Libras. The interviews were taped,transcribed and subjected to content analysis. The results indicate that the conceptions of deafness constitute amultifaceted view on this condition, infl uenced by social relations throughout each person's life trajectories. Theresearchers perceived that learning Libras enabled deaf persons to constitute their own assertiveness as someonewho is different, with different needs.

A variedade léxica da língua espanhola em dicionários bilíngues espanhol-português para aprendizes brasileiros

Due to factors such as globalization and the demography of Hispanic countries, the Spanish language has influenced worldwide, especially since the last decade of the 20th century, mainly countries which are geographically close to Spanish American countries, such as Brazil. In this context, it is necessary to think of the linguistic variation of the Spanish language, in which we emphasize the lexical variation. As any language, Spanish has a colossal and wealthy lexicon with different varieties related to the characteristics from each region: history, culture, customs etc. This diversity influences the development, the amplification and the renewal of a language, as well as the teaching-learning process. Thus, we proposed to analyze the lexicon varieties of Spanish language entries in some Spanish-Portuguese bilingual dictionaries for Brazilian learners. In order to achieve this goal, we selected some examples of lexical variety in a corpus organized with texts of different textual genres and we verified if these lexical items are registered in the dictionaries chosen. As the corpus is organized from texts present in didactic manuals used in Brazil, our goal is to verify if the vocabulary which the Brazilian learner has contact in formal education is registered in the analyzed dictionaries.

Planilha eletrônica para auxilio à tomada de decisão em manejo de irrigação

The irrigation scheduling is basically the adoption of pre-established criteria to define the time and the amount of water to be applied through irrigation systems. Hence, the objective of this work was to develop and test a spreadsheet of easy comprehension, handling and interpretation by growers, which uses as inputs the physical-hydric soil attributes and tensiometer readings to the determination of irrigation depth and time. The spreadsheet enables the grower to make reading and to know in a fast way how much water to apply into the soil. The test of the spreadsheet was performed in an irrigated orchard of grapevines in Petrolina, State of Pernambuco, Brazil. Soil water retention curves and tensiometer readings from the effective rooting depth were used as a basis for obtaining the soil water matric potential, soil water content, water availability, soil water content to be replaced, net and gross irrigation depth and irrigation time. The analysis of the use of the irrigation scheduling spreadsheet resulted in a shorter time for irrigation in relation to the irrigation scheduling based only on the crop evapotranspiration. The spreadsheet can be helpful to growers adjust irrigation depth when irrigation scheduling is based only on crop evapotranspiration.

O processo de conscientização na sala de aula de língua espanhola

This article discusses the awareness process of students in a Spanish as a foreign language classroom, at a Centre of Language Studies in a city in the state of São Paulo, Brazil. The frame of reference is Paulo Freire's pedagogy (FREIRE, 1980, 1984, 1987, 1999, 2000), Wallerstein (1983) and Schleppegrell (1997)'s investigations which are important to the comprehension of the relation between Freirean's pedagogy and the language teaching. This is a qualitative research and it focuses on action research practice in a Spanish language classroom, in which a syllabus based on Paulo Freire's pedagogy was implemented in order to verify how the target language was used in the classroom (MENEGHINI, 2001). Data analysis and discussion are based on data triangulation and classroom interactions are taken on primary data. The implementation of this research suggests that the problem posing tasks on themes chosen from the student's realities are the way which leads to the awareness.

Estudo sobre as expressões idiomáticas e o uso de dicionários especiais da língua portuguesa no ensino fundamental

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

Análise discursiva de dicionários de língua portuguesa

Pós-graduação em Estudos Linguísticos - IBILCE

A concordância verbal na língua falada na região noroeste do Estado de São Paulo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O vocabulário básico do português no processo de aquisição da língua materna

Pós-graduação em Estudos Linguísticos - IBILCE

A utilização de dicionários de língua portuguesa em salas de aula de Ensino Fundamental

Pós-graduação em Estudos Linguísticos - IBILCE

Análise histológica e de microscopia eletrônica do desenvolvimento inicial de jaú (Zungaro jahu)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

PCN e prática docente de língua portuguesa: articulações possíveis

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)