Repositório RCAAP

In the organizational field, the communication appears in order to establish a link between the company and the public, and clarify the meaning the role and the reason for the Organization. However, the organizational communication process happens in all kinds of organizations, including those self-managed. To better understand this perspective, we seek to know, through this thesis, the complexity of the organizational communication process on developments solidarity from the perception of family farmers and to understand the role of such enterprises in fostering social inclusion. The multiple factors that nourish this research lead us to question the importance of organizational communication in recognition of solidarity enterprises as community in the search for their respective strengthening. From this perspective, it perceives that any organization needs to develop their communicative processes to can carry out its function in the social environment. This study is based on exploratory and qualitative research and its data obtained through semi-structured interview. Data analysis was performed using the set of content analysis technique as Bardin model. The present study had as its object the family farmers belonging to Casa Apis and Cocajupi economic and solidarity enterprises, located in the Valley Guaribas Territory in Piauí backwoods.

This Scientific and Technical Report concerns the new information technologies introduced into the communication market and their consequences for the employability of such professionals above the age of 40, here named seniors. We assumed that professional experience would govern the introduction, use and improvement of new technologies in the communication processes in the workplace, and not the opposite, as we have identified. The explosion of technology applications since the 1980s generated a synergistic effect on other existing technologies, forcing the old society to readjust itself in terms of organization, communication and economics. From this rapid technological adjustment a new challenge was presented to these senior professionals: the new applications incorporated into hardware- and software-based routines, with profound implications for the required knowledge and skills. In order to provide greater familiarity with the problem posed, namely, the precarious employability of senior communication professionals, we have undertaken an exploratory research with communication and HR companies in Uberlândia, and with the target public. Based on these data, as well as on information collected from articles, reports and books, the results indicate that technology is an obstacle between senior professionals and the new jobs offered in the communication field. This conclusion has led us to create a job vacancy website exclusively aimed at senior communication professionals. The purpose of this website, called VagaSenior, is to assist unemployed senior communication professionals to re-enter the job market. We believe this project is the first of its kind, as we have not found any websites with a similar age or thematic focus.

The Statute of Children and Adolescents (ECA), sanctioned in 1990, still does not apply in full. Given this context, the paper presents an intervention proposal for communication and education about children\'s rights through the flip chart that can be used in several areas, among them, there is the pediatric ward of the Clinical Hospital, field which began the observations and where was raised the need to work the theme and create the product. Illustrations were developed to provide adequate and simple understanding of the Statute of Children and Adolescents. To subsidize the production of the album series, it used the literature, through books and comics. Among the topics discussed were discussed preference that children and adolescents have in the allocation of public resources and the creation of public social policies; the right to education, culture, sports and leisure; right not to be exploited or to work; to be protected, and not have their freedom, dignity and respect violated; access to public health services and social services and the free supply of drugs, prostheses and other resources related to treatment, habilitation or rehabilitation.

This research has as main objective to verify if university professors of the Accounting Science course have knowledge about the pedagogical concepts and teaching knowledge. It was acknowledged as object of analysis the opinions of teachers who work in the higher education on bachelor\'s degree of Accounting Science from a Higher Education Institution - IES of Uberlândia / MG. The theme is justified by the importance of bethinking on the practice of teaching in the Accounting Science courses, where teaching skills, most of the time, are kept as secondary against the technical and practical knowledge. The proposed methodology was a qualitative and quantitative study executed using data collected by a research instrument. To do so, it was provided a questionnaire in electronic address compounded of four steps. The first step looked for information on the subjects of the research. The second, consisted of a questionnaire to value the opinions of teachers about: 1) conception of university teaching and 2) teaching knowledge. The third step applied a questionnaire with free and reflective questions on the central topic of the research, and the fourth step was opened for general comments. The questionnaires were tabulated together to extract the data for quantitative and qualitative analysis, which verified reflections in regard to the improvement of university teaching professionals working in the Accounting Science courses. According to the sample of 22% (out of 100%), it was found that it is necessary the pedagogical training for the practice of university teaching, since the curriculum of the Accounting Science course does not explore these issues, and only the professional experience is not enough to work the ample variables of education. The surveyed professors share this need and, even if slowly, it is possible to confirm the change of vision of teachers compared to traditional conceptions of education.

This present study analyses whether the Portuguese textbooks contribute to students\' digital literacy. To accomplish this research, we have selected seven Portuguese books from the 6th grade (primary school, late years), approved by the Textbook Guide of the National Textbook Program (Portuguese for PNLD-2014). To analyse them, the background theoretical information is anchored in the field of digital literacy, supports discussion and in the study of discursive genders (digital). The methodology is qualitative with bibliographic and documentary bias. To apply it, we have built a table and a graph that rank the books with more digital terms. With these data, we have selected two books for analysis. Our results point out that they do contribute to the digital literacy of the students, with reading and writing activities focusing on the diversity of digital genera that circulates in the network society. However, this result is still little within the universe of the seven analysed books. If we extend this number for the 12 books that have been approved by the PNLD/2014, we observe that the result is even smaller. Therefore, Portuguese textbooks need to address more digital genera, because they do contribute to the digital literacy development of the students who live increasingly in a digital society.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

In this work we investigated potentialities of the multiple pulse amperometric detection (MPA) coupled with flow system. Simple analytical methodologies were developed for the simultaneous determination of analytes of pharmaceutical or environmental interest using MPA coupled with flow injection analysis (FIA) and highperformance liquid chromatography (HPLC). The simultaneous determination of ascorbic acid (AA) and paracetamol (PC) by FIA with amperometric detection was carried out by applying four sequential potential pulses (which are repeated within regular intervals) in function of time. AA is directly detected at +0.40 V / 100ms and PC indirectly at 0.00V/100ms through the reduction of the oxidation product (N-acetyl-p-benzoquinoneimine) electrochemically generated in the prior potential pulse (+0.65 V/100ms). The fourth potential pulse (-0.05 V/300ms) is applied for regeneration (cleaning) of the working gold electrode. The same principle of detection was applied for the simultaneous detection of active principles such as dipyrone (DI) and paracetamol (PC) in pharmaceutical formulations. As described in the previous method, the compounds were detected simultaneously through the application of four sequential potentials pulses in function of time on a glassy carbon working electrode. Dipyrone (DI) is directly detected at +0.40 V/100ms and paracetamol (PC) indirectly at 0.00 V/200ms. The oxidation product electrochemically generated from DI is also electroactive in the potential pulse applied for the indirect detection of PC (0.00 V). The selectivity for the PC detection in this potential pulse was obtained in function of the time of pulse application (200ms). Both simultaneous analyses were carried out under 0.10 mol L-1 acetate buffer (pH 4.7). The linear regressions obtained from analytical curves for simultaneous analyses presented excellent correlation coefficients (R = 0.999), as well as the recovery values (100 %). The analytical frequency for the proposed methodologies were calculated as 45 and 60 injections per hour for the analysis of DI/PC and AA/PC, respectively. The relative standard deviation for studies of repeatability of signal was lower than 1% for all analyses. The proposed method was used successfully for the determination of such compounds in pharmaceutical formulations. MPA detection coupled with FIA was also employed for PC quantification in the presence of high concentrations of AA using the standard addition method. In this case, it is possible to detect PC at trace level (LD = 0.20 mg L-1) in the presence of AA in 800-fold excess. (176.0 mg L-1). The present work also describes the possibility of coupling MPA detection with highperformance liquid chromatography (HPLC) through an electrochemical wall-jet cell. The MPA detection mode coupled with HPLC presents advantages such as fast response, high stability, and elevated selectivity of analytical response. The proposed electrochemical cell does not present either effects of peak broadening or carryover effects which make possible the monitoring of analytes separated by the chromatographic column with resolution comparable with a commercial UV detector. Moreover, this work demonstrates the versatility of the electrochemical cell developed in our laboratory for adaptation of commercial or home-made working electrodes for electrochemical detection in HPLC systems.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

In the present study employed three different methods of synthesis (sol-gel, macroemulsion, precipitation of titanium dioxide by hydrolysis of titanium tetraisopropoxide solvated in different monoalcohols) aiming to obtain photoactive nanomaterials based TiO2. The samples obtained were characterized by instrumental techniques that allowed us to estimate the specific surface area (BET), structure (XRD), the band gap (DRS) and morphology (SEM-FEG). The powders of TiO2 obtained using sol-gel method and macroemulsion generated different distributions of polymorphic materials. The introduction of modifier ions induces the formation of secondary phases, formation of aggregates dispersed on the surface of the particles, and increased the photoactivity of these materials. The synthesis based on precipitation of TiO2 by hydrolysis of titanium tetraisopropoxide solvated by different monoalcohols led to the formation of TiO2 microspheres with different sizes, which showed its interior filled with nanospheres. The polymorph anatase was the main crystalline phase found in powders obtained by this method. The crystallite sizes of anatase ranged from 19 nm to 28 nm, and the average size of nanospheres was 25 nm. The photoactivity of the synthesized TiO2 was estimated by its ability in photogenerate hydroxyl radicals (OH●). The estimated ΦOH● was correlated with the specific surface area of the fraction of anatase polymorph found in the different synthesized TiO2. From this parameter, it was possible to establish a connection between the production method of TiO2 and its apparent photocatalytic action. Between the synthesized oxides, the most promising, based in this parameter, was the obtained by hydrolysis of titanium tetraisopropoxide solvated in 2-propanol, which presented ΦOH● = 4,3%, the value closest to the estimated for TiO2 P25 (6,0%) in the series of synthesized oxides. The simplification of the stages of synthesis and minimizing the consumption of reagents to obtain photoactive TiO2 aiming its use in heterogeneous photocatalysis and systems for converting solar energy into electricity, were strategies employed in this work.

The development of biologic sensors has become a wide activity in science seeking mainly health and environmental issues. The biosensor development in laboratory has been investigated by many researchers seeking sensitivity, specific, low cost and portable devices. The electrochemical techniques are used in the largest number of works due to the easiness in the process and in the instrumentation, allowing for the rapid and reliable results. Modified electrodes with conducting polymers have been used because they improve the analytical response in addition to aid in the biomolecule immobilization. This work aimed the use of graphite electrodes and graphite electrodes modified with poly(3-aminophenol) for the construction of DNAbased biosensors for the detection of hepatitis C virus and prostate cancer. The polymer presents adequate conditions (ease in formation, thermal and electrochemical stability besides the presence of functionalizations in its structure) for the sensor construction. The denatured PCR products were successfully immobilized over the polymeric matrix. The hybridization indirect detections were performed using ethidium bromide (EB) oxidation signal. The detection system for prostate cancer and hepatitis C was optimized with 15 minutes of interaction between target and probe, concentration of EB at 0.54 mmol.dm-3, detection limit of 16 and 19 ng and quantification limit of 54 and 64 ng for prostate cancer and hepatitis C, respectively and lifetime for the sensors of 60 days. Electrochemical impedance spectra were obtained proving the probe and target immobilization efficiency due to electrostatic differences between the anionic solution and the immobilized material. Increase in resistance and capacitance values of the systems containing the probe for the systems containing the targets shown a response difference, qualitatively. A mathematic model based on factorial design planning between EB and Calf Thymus DNA was performed through fluorescence spectroscopy, UV-visible spectroscopy and differential pulse voltammetry. A proportion of 6:1 for DNA/EB was found the best condition and, in the working range of this study, the influence of sodium chloride was investigated, with the better results for a concentration of 20 mmol.dm-3.

This work dealt with the transesterification reaction as the chemical process to obtain biodiesel via either methyl or ethyl routes, using oils from corn or soybean grains. The thermal expansion coefficients were determined for both methyl and ethyl biodiesels, be from corn oil or soybean oil. Specific mathematical models were proposed to predict values of the thermal expansion for each of these biodíesels. It is remarkable the found difference between predictable values as obtained from the proposed mathematical model (algorithm) for the biodiesels, even if compared to the standard EN 14214 recommendation. The optimal set of reaction conditions for the transesterification process via ethylic route was more specifically investigate by using the following variables: temperature, speed, reaction time, type of catalyst, concentration of catalyst and molar ratio. The latter two were found to be operationally more important. The transesterification reaction with corn oil was found to be a robust process, in the sense that small variations on its condition do not significantly affect the whole yield: the tolerated range of values for the catalyst concentration is 1.56 ± 0.25% (m/m) whereas for the molar ratio (ethanol: oil) it is 10.9:1 ± 1. Conditions of maximum yield for this reaction are (i) type of catalyst: potassium hydroxide; (ii) catalyst concentration: 1.56 % (w/w); (iii) molar ratio (ethanol: oil): 10.9:1; (iv) temperature: 55 0C; (v) reaction time: 60 minutes and (vi) rotation: 100 rpm.

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Conselho Nacional de Desenvolvimento Científico e Tecnológico

O café é uma das bebidas mais consumidas e apreciadas no mundo. O Brasil tem uma posição destacada na produção mundial desses grãos e tem investido na melhoria de sua qualidade. A composição do café é influenciada por diversos fatores, que envolvem desde a seleção da cultivar até as condições de torra. O aroma e sabor do café são formados principalmente na etapa de torrefação, assim o grau de torra contribui sobremaneira para a composição e qualidade final da bebida. Neste estudo, quatro cultivares de Coffea arabica (catuaí amarelo, mundo novo, topázio do Sul de Minas, acaiá e catuaí amarelo do Cerrado Mineiro) e um cultivar de Coffea canephora (conilon do Espírito Santo), nas torras clara, média e escura, foram analisados por métodos cromatográficos (CG-EM, CLAE, CLAE-EM), espectrofotométricos (fenóis totais, proantocianidinas e atividade antioxidante) e químicos. As análises por CG-EM indicaram uma composição da fração volátil similar entre as amostras, com diferenças nas concentrações dos compostos, destacando a importância da beta-damascenona na definição do aroma, principalmente no café conilon. As análises por CLAE confirmaram dados relatados na literatura sobre a decomposição dos compostos bioativos em função do rigor da torra e o alto conteúdo de cafeína e de ácidos feruloilquínicos no café conilon e mostrou que os flavorantes presentes nas duas espécies são praticamente os mesmos. Entretanto, esses flavorantes têm concentração similar nos cultivares arábicos e bastante diferente no café conilon.