RCAAP Repository

In this work, the synthesis, characterization, and investigation of luminescent properties of compounds containing the carboxylate N-acetylglycine (AcGly) ligand coordinated to the trivalent lanthanide ions are reported. The characterization of the compounds was performed by complexometric titration with EDTA, infrared spectroscopy, proton nuclear magnetic resonance (1H NMR) and thermal analyzes (TG / DTG and DTA). The obtained data indicate that the obtained compounds present general molecular formula [Ln (AcGly)3(H2O)3], where Ln: Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb. The spectral absorption data in the infrared region showed values of Δν (wavenumber difference between the symmetrical and asymmetric stretches of the carboxylate group), around 100 cm-1, indicating that the AcGly ligands are coordinated to the Ln3+ ions in a bidentate chelating form via their carboxylate groups. The thermogravimetric analysis shows that all the water molecules are coordinated to the central metal ion and at the end of the analysis the lanthanide oxides are formed. X-ray diffraction analyzes showed that the compounds are all isomorphic. The luminescence (excitation and emission) spectra of the compounds, either in the visible or near infrared region, are characterized by narrow bands originating from intraconfiguration-4fn transitions centered on lanthanide ions. The Eu(AcGly)3(H2O)3 complex exhibits a spectral profile characteristic of a chemical environment of C3 symmetry. The values of intensity parameters, radiative and nonradiative rates and quantum efficiency for this complex were determined. Although there are no chromophores in its structure, the europium and terbium complexes exhibited luminescence from direct excitation. Furthermore, the terbium complex showed intense fractoluminescence at room temperature.

This thesis was developed with the objective of analyzing the lobster fishery in Paraíba, as well as the socioeconomic profile of the fishermen, in order to contribute to the management of this fishery resource. Aiming at maintaining this extractive and economic activity of coastal communities. This research has the purpose of obtaining a diagnosis of the lobster fishery of the genus Panulirus in Paraíba, to ensure the survival of the resources in parallel with their extraction. The thesis was divided into two chapters that will become articles. The first one is entitled: Mapping of artisanal lobster fishing on the coast of Paraíba and socioeconomic aspects of the fishermen where the fishing ethnography and the lobster fishermen of Paraíba were approached, aiming to build a profile of lobster fishing from of the fisherman's vision, in order to have data that allow to draw up a strategy of fishing, based on the sustainability with focus in the conservation of the fishing resource. A socioeconomic survey of the lobster fishermen of Paraíba was carried out between July/15 and December/17, through interviews based on 40 questions aiming at generating information on artisanal fisherfolk that will help government agencies to outline future support policies, based on local reality. The artisanal fishermen who catch the lobster in Paraíba are mostly adults, aged between 31 and 50 years, married, who have been fishing for more than 30 years, and, depending on the weather, work 3 to 4 days a week. They have an average monthly income of 3 minimum wages, which is usually complemented by extra activities such as construction and others related to fishing. The second chapter deals with the Characterization of the population of lobsters of the genus Panulirus marketed in Paraíba - Brazil, where it was presented results of the quantitative aspects of the population biology of commercialized lobster, as well as the diagnosis of the fishing in Paraíba, which generated a source relevant data for management. The data collected from March 2016 to February 2017 were grouped according to the 6 municipalities in which the survey was conducted. 650 lobsters were sampled. The species with the highest occurrence was Panulirus echinatus (249 individuals). The most frequent recruitment times in winter were identified for the three species. The proportion between the sexes presents a predominance of males in relation to the females for Panulirus argus. Thus, it can be concluded that lobster fishing on the coast of Paraíba is done in an artisanal way, with a poor and dispersed structure, where there is no precise control of its production and is of great importance for part of the fisher population living in the Coast. Some of the problems detected among the interviewees include the reduction of fishing, the invasion of boats from neighboring states, predatory fishing and ineffective inspection by the competent agencies, the lack of infrastructure for processing and the disagreement of the fishing season. closed. All this indicates that the practice of artisanal fishing in Paraíba is not sustainable, it degrades, pollutes, extinguishes, and fishermen are aware of what they do and their consequences. Nevertheless, they continue to repeat this vicious cycle in order to increase the gain, since some have no alternatives.

The present work seeks to bespeak and analyze the possible ways to use the Communication and Information Technologies (ICTs) in the mediation between the performative utterances, built along with the students of the Municipal School of Arts - Casa das Artes - and its feedback with the performer students. A set of theatrical and improvisational games were used aiming to construct an active learning presence. The experience was performed practically, and developed into two performative utterances. The first one, having as stimulus the urban space within a conception of Corpocidade / Corpografia; and the second, the poetry of Paraiba as a field of experimentation, both aimed at developing performative experiments from the game in the relationships between body, voice, space and time, building a present body action being later shared in the virtual environment. The research brings an analysis of the possible reflections made from a smartphone screen and from the look of the students / performers, taking the virtual space as an expanded territory of learning and sharing of knowledge.

In the group of emerging and reemerging infectious diseases, mosquito-borne arboviruses are considered public health challenges. Early recognition of local transmission, followed by rapid and effective vector control and encouragement of social mobilization programs, can broaden prevention measures and minimize the risk of dissemination by reducing the occurrence of sudden outbreaks caused by arboviruses. The present work aimed to identify the occurrence of arboviruses and to correlate them with socioenvironmental aspects in the community Santa Bárbara, João Pessoa / PB. For this, traps were placed for oviposition, for later analysis and quantification of the species. To characterize the epidemiological factors, to draw the sociodemographic profile, an investigative questionnaire was applied to correlate the socioenvironmental issues that could be influencing the presence and maintenance of the vectors in the community. The traps showed a higher oviposition in the hotter periods of the year with a peak in the February period, which confirms the positive influence of temperature on vector proliferation. Humidity also interfered positively, followed by precipitation in order of importance. It was observed that most of the Santa Bárbara Community is marked by the absence of basic sanitation. The recorded cases of arbovirus cases was 62.56% of the studied population, of which 63.11% were affected by Dengue. Among those affected by some arboviruses, only 48.86% were submitted to diagnostic confirmation tests. Although the role of endemic agents is of fundamental importance for the prevention and control of outbreaks of arboviruses cases, it was verified that many residences were not visited by them and those who received the visit were not surveyed nor did their residents receive any information on how to prevent or combat the proliferation of vectors. Through the investigation of the breeding sites and the vector positivity by type of container it was possible to verify that the highest breeding indexes were characterized as type D2 residues. Based on the results, we can infer that climatic factors and socioenvironmental issues directly influence the development and oviposition of vector insects and that they are adapted to the local ecosystem.

The Civil Construction is one of the areas that have the most nonrenewable natural resources in the world, considering what is one of the pillars of the development of a society. Through the creation of new technologies, they have increasingly sought the use of less aggressive building materials with less energy use in their manufacturing process and low environmental impact. This study, this approach to sustainability in the civil building bringing together techniques of the Green Roof (TV) along with application of the Alkaline Activated Material (MAA) from the preparation of a pre-molded block for green roofs. It was evaluated the constructive pattern to be used in the preparation of the MAA mortar blocks, the type of raw material used for alkaline activation (metacaulinite and weathered soil), two types of alkaline activators (sodium and potassium silicate), two different synthesis temperatures (50 oC and 75 oC) and two different ages (1 and 7 days). The samples were characterized physically, chemically, mineralogically and microstructurally, as well as their mechanical properties in terms of compression and flexural strength. It was observed that, for the products obtained, the age and the synthesis temperature influence its mechanical properties and that the material synthesized on the basis of metacaulinite and sodium silicate at 50 oC presents better conditions for the production of blocks to be applied in green roof.

This dissertation presents the results of a research on the contemporary Sino-Brazilian relations in the energy field. Based on the literature on international cooperation and strategic partnership, the study of qualitative nature collected, described and analyzed data related to the process of intensification of China's inclusion in the Brazilian power sector between the periods of 2010 and 2017. Emphasizing the case of performance of State Grid Corporation of China (SGCC) in Brazil and the acquisition of Companhia Paulista de Força e Luz S.A. (CPFL) by this company in 2017, the research aimed to understand the reasons for the Brazilian Government's permission to increase the Chinese participation in the sector and its effects on the bilateral relations in the area of energy and development of electrical industry nationally. Starting from an initial hypothesis that the positioning adopted by the Brazilian Government has been due to their interest in the maintenance of Chinese investments in the electricity sector, domestic work used the Process Tracing method to analyze the political dimensions, scientific-technological and commercial financial bilateral relations in the energy area, being the completion of the survey the existence of significant convergence between Brazilian and Chinese interests in the energy field but also the observation of a curious weakness in Sino-Brazilian current dynamics.

This work was aimed at the evaluation of the antifungal action of isolated and associated (+)-α-pinene and (+)-β-pinene enantiomers on Candida species, their possible mechanisms of action, their molecular interactions with enzymes related to wall formation and fungal cell membrane, as well as its antibiofilm activity. It was used 25 strains of Candida, of clinical origin and of reference, sensitive and resistant to licensed antifungal agents, for determination of Minimum Inhibitory Concentration (MIC), Minimum Fungicide Concentration (CFM), Fraction Inhibitory Concentration Index (ICIF), Microbial Time-kill Curve, possible mechanisms of action, molecular docking and the effect on the inhibition of the biofilm adherence provided by the enantiomers. A descriptive and inferential statistical analysis was performed, considering α=5%. The MIC values ranged from 114.06µM to 7300µM (15.6 µg/mL to 1000µg/mL) and from <57.03 µM to 1825 µM (<7.8 µg/mL to 250µg/mL) for (+)-α-pineno and (+)-β-pineno, respectively. After the association of the evaluated products, it was observed additivity (ICIF = 0.5) and indifference (ICIF = 1.125), when evaluated on strains of C. albicans and C. glabrata, respectively. It was observed that at the MIC and 2xMIC concentrations, (+)-β- pinene was able to reduce significantly (p≤0,05) the fungal growth after 8 hours of incubation. The MIC values of (+)-β-pinene increased 2x for the C. tropicalis and C. krusei strains, when in the presence of 0.8 M sorbitol. In the presence of ergosterol these values remained unchanged, suggesting that this substance acts by means of the inhibition of cell wall synthesis. In the evaluation of the molecular docking simulation, the binding energy values between (+)-β-pinene and enzymes, showed that Delta-14-sterol reductase presented a more stable interaction (−51 kcal/mol), suggesting a probable action on ergosterol biosynthesis. The (+)-β- pinene inhibited 67% of the multi-species biofilm. (+)-α-pinene and especially (+)- β-pinene present effect in vitro on strains of Candida, in planktonic state and organized into biofilms. The action of (+)-β-pinene is probably related to the binding of this molecule to enzymes involved with cell wall formation and ergosterol from fungi of the genus Candida.

The present study sought to investigate behavior in the elaboration of familiar and unfamiliar scenarios for a future time, with elements of future episodic thinking (what-wherewhen) and the performance at the recall, in order to assess if familiarity issues and novelty are related to the ability to achieve more or less vivacity and more or less details. Thirty-six volunteers participated, among 13 males and 24 females, but 16 participants had their data discarded because they had not reached 80 % of gazing rate acquisition. The data of 11 female and 9 male subjects were analyzed. The mean age of the male volunteers was 19 years old for the male population and 21years old for the female population. One experimental task and one previous training were performed to familiarize the participants with the equipment resources with the task procedures. The training contained distinct clues (keywords) from the experiment itself. The sequence order of the clues was the same for all participants, since the purpose of the statistical data analysis would be inter-subject. First, they were asked to create scenarios within a week from the day of the experiment and these scenarios should answer the following questions: the first sequence of clues were 6 (six) words representing family sites and the second sequence was of words representing unfamiliar / new places .After each word / place presented, volunteers received the following information: Imagine in these scenarios: (1- what you will be doing, 2-where you will be, 3-what day this event will be). While the volunteers watched a blank screen for 60 seconds, an eye tracker Tobii TX300 made the binocular capture of eye movements. After the elaboration of each scenario (familiar and unfamiliar / new) participants answered three questions, the same questions for all scenarios and, on a five-level scale of the Likert type, chose the impression they had of the intensity of vivacity of scenes or the impression of the amount of detail that they were able to recall. The main results were: there was a difference in the performance of the recalled information about future episodes in the construction of familiar and unfamiliar scenarios: in the familiar scenarios, the vivacity and quantity of details was greater than in unfamiliar or new scenarios. However, the ocular behavior during the construction of familiar and new scenarios did not present differences, or presented small differences as the ocular movement followed a similar pattern during the construction of the two types of scenarios, but data showed that there were more fixations within the two upper quadrants (1 and 2 ) than the lower ones ( 3 and 4 ). Another result obtained was the recording of amounts of fixations that had a greater number in quadrants 1 and 2. And, differently from the previous result, which had shown no difference between familiar and non-familiar fixations duration during the scenes constructions. Regarding to the fixation count number, the hypothesis that there would be registered a higher number of fixations during the construction of familiar scenarios than during the non-familiar scenarios, was confirmed.

Population aging has contributed to an increase in morbidity and a decrease in functional capacity, increasing the number of elderly people with some degree of dependence who need home care. Caring for an elderly person in a domestic environment can generate an overload on the family caregiver, which causes emotional, physical, economic and social disorders. Due to the unpreparedness of this caregiver his health can be put at risk, being able to thus present musculoskeletal alterations. Objectives: To identify the scientific production on health promotion of caregivers of the elderly; to develop an educational technology of the type guide on self-care in relation to occupational health for caregivers of the elderly; to verify the semantic, idiomatic, cultural and conceptual equivalences of the guide for caregivers of the elderly through a committee of judges and to carry out the semantic validation of the guide by a group of elderly caregivers. Method: This is a methodological study, whose proposal was to construct and validate semantically an educational technology of the guide type for the health promotion of caregivers of the elderly. Results: From the results obtained after analysis, two articles were outlined the first, an integrative review on the educational technologies for health promotion of caregivers of the elderly in which the rescued articles showed that the educational technologies were focused on the promotion of mental health of the caregiver in the aiming at guaranteeing a better care for the elderly, thus making it possible to identify an important scientific gap regarding the educational technologies used to promote the musculoskeletal health of caregivers of the elderly, as no studies on this care were found. The second article dealt with the elaboration and validation of an educational technology for health promotion of caregivers of the elderly. Conclusion: It is considered that the educational technology of the guide type "Health promotion of caregivers of the elderly: educational technology on occupational health", can contribute to the physical health of caregivers of the elderly in their caregiving, subsidize health professionals during activities of health education with caregivers of the elderly and fill an important scientific gap regarding health promotion in the physical overload experienced by caregivers of the elderly.

The preparation of composite polymers with fillers and / or fibers has been a way of obtaining new materials and improvement of polymeric materials performance. In this scenario, loads of metallic quasicrystals AlCuFe have been emerged with high potential for use as reinforcement in polymer composites due their properties such as high hardness, friction and wear. In addition, quasicrystal loads can act as potential electrical insulators and they are excellent conductors of heat. This work presents a study of the thermal and mechanical behavior of composites made of Polyethylene ultra high molecular weight polyethylene (UHMWPE) and quasicrystal (AlCuFe). These composites were characterized by differential scanning calorimetry (DSC), thermogravimetry (TG), tensile testing, flexural testing, fracture toughness, and scanning electron microscopy (SEM). The DSC analyses suggest that with addition loads of quasicrystals into the matrix, the degree of crystallinity is increased. In TG analyses, the addition of the loads did not change the thermal stability of matrix, and mass losses remained in a single step. The mechanical tensile testing showed a slight increase of elastic modulus with increasing load, whereas for the bending testing an increase of elastic modulus occurred until to 2% load. The analysis of SEM showed a lack of load/matrix adhesion, and a good distribution of quasicrystal in UHMWPE composites. The fracture energy was decreased when the load of quasicrystal was increased in UHMWPE composites, resulting in a more fragile behavior of 98/2, 95/5 and 90/10 composites than pure UHMWPE.

In this study, we evaluated the use of zein based films, maize storage protein, to the bean seed coating (Phaseolus vulgaris). The tested solutions were obtained using 1% by weight of zein and 4% alcohol solution. Initially, a study was conducted with four different alcoholic solution (ethanol, isopropanol, methanol and ethanol / sodium hydroxide solution), where it was shown that the film properties are affected by the type of solvent used. The films used in the coating of the bean seeds were prepared with ethanol and eugenol incorporated with different concentrations of 5, 10, 15 and 20%. Characterization thermal, morphological, and mechanical barriers were made to study the effect of eugenol on the properties of zein films, where it was observed that eugenol reduced glass transition temperature of the films, reduced porosity and increased irregularities on the surface of the films left most hydrophilic films and reduced modulus and permeability to water vapor. To evaluate the antifungal action of the films against the fungus Penicillium sp. we performed the inhibition zone test and eugenol all concentrations tested showed activity against the fungus. Of these, eugenol two concentrations were tested covering the seed 5 and 20%. The films obtained in 5% eugenol did not affect the germination of the seeds unlike films with 20% eugenol. Both concentrations decreased the rate of seed germination.

Separation processes involving ceramic membranes have shown high potential for applications in various industrial sectors. The main reasons for the advancement of these separation technologies are the fact that these membranes work without the addition of chemical agents and require low energy. Currently, the main concern in their development is to minimize costs and achieve more efficient production processes. The aim of this study was to evaluate the ceramic membrane properties obtained with regional and alternatives raw materials aimed at use in water treatment. Therefore, compositions were formulated using the mixture design of clay, granite waste and porogenic agents. As porogenic were used sucrose, calcite and shellfish shells powder. The clay, granite waste, calcite and shellfish shells powder were subjected to physical and mineralogical characterization. Membranes were shaped in the form of discs via uniaxial pressing process and heat treated at temperatures of 900, 1000 and 1100 ° C and after the samples were analysed by characteristics of porosity, strength and microstructural aspects. Distilled water flow tests were conducted / permeability and porosimetry by mercury intrusion and, from these results, the most promising membranes for testing were selected with a view to the application of the same at treating a water supply system Campina Grande city, PB. The best results were obtained with membranes made by the compositions clay, sucrose and shellfish shells powder, reaching varying porosity in the range from 37.53 to 46.70% with an average pore diameter varying from 0.0038 to 0,2206 μm, diametrical compression strength of 1.93 5,39 MPa and the permeability flux (using distilled water) of about 500 l / h.m2. These membranes were sorted for possible applications in microfiltration, ultrafiltration and nanofiltration, and were effective in the treatment of water, with the removal of 100% of the color, turbidity, solids suspensions and significantly reduce the concentration of hardness, alkalinity, total acidity and chloride.

Zeolites are porous solids whose chemical composition is mainly formed of silicon and aluminum elements and silicon in the form of crystalline hydrated aluminosilicates. These materials have particular properties inherent its structural characteristics that make them useful in many industrial applications. The synthesis of zeolites from waste and natural sources of silicon and aluminum has stood out due to environmental and economic benefits. The raw material precursor used in this work is the fly ash from thermal power, whose conversion to zeolite is explained by its alkaline activation by sodium hydroxide (NaOH). This technique is characterized by low cost and because it is a technological alternative with great added value by transforming existing materials on a large scale in an innovative material. This study aims to obtain zeolites at low cost for subsequent treatment with organic surfactante, making it organoclays for use as adsorbent oil and viscosity agent for non-aqueous drilling fluids, the latter being an unprecedented application. The samples were characterized by sieve analysis techniques by Laser Diffraction (LALLS), X-Ray Diffraction (XRD), chemical composition by X-Ray Fluorescence (XRF), Differential Thermal Analysis (DTA) and Thermogravimetric (TGA) and Scanning Electron Microscopy (SEM). The evaluation of the adsorption capacity was carried out based on ASTM F716-12 and ASTM F726-12 standards and the analysis of viscosifying properties was based on the standard of Petrobras EP-1EP-00023A. As results we obtain the type of zeolites sodalite and cancrinita, from the transformation of fly ash, by synthesis, the concentration of 3.5 M, 5,25 M or 7,0 M NaOH for 24 h, 36 h or 48 h. It was verified the benefit of organophilization for the synthesized at 3.5 M NaOH samples. The determination of apparent viscosity, innovation in zeolites area, presents satisfactory results with attendance of standardized viscosity values.

Knowing that is the atomization process in which water contained in a suspension is removed by evaporation in a controlled manner, for ceramic materials, the main function of the atomization process is dry and at the same time the granular powder. The objective of this study was to compare post resulting from the atomization methods in industry and in the laboratory, in addition to the dry powder prepared in an oven by analyzing the technological properties of the specimens due to these materials in order to determine the influence of different types of processing in final properties of the ceramic materials. To develop this work were obtained two types of materials. The atomized powder of a ceramic tile industry, and proceeding slip of the same powder, which was atomized in the laboratory and also prepared by drying in an oven. All samples were characterized with fluorescence test X-ray, X-ray diffraction, thermal analysis, particle size analysis and microscopic analysis. After obtaining the post, the technological properties of the shaped bodies by pressing tests were measured and compared. The results indicate that the resulting powders have different characteristics when compared primarily the morphology and particle size distribution when processed in different ways, with the best results powders atomized in the laboratory, which showed higher sphericity, smaller sizes and a narrow distribution of beads. Regarding the technological properties of burning was not possible in 1250 °C, to obtain the results of linear shrinkage and flexural strength due to pyroplastic deformation in 1250 °C. According to NBR 13818¹ (1997) for ceramic tiles, samples conformed to 1100 ºC ranked in porous coating, to 1150 °C in semi stoneware and 1200 °C and 1250 °C for porcelain ceramic type finish. The optimum firing temperature was reached to 1200 °C.Only the samples conformed to 1200 ºC reached the values set as standard for ceramic coating. Struck up a good firing temperature to 1200 °C. Despite the differences in morphology of post processed in the laboratory and in the industry, the ceramic coating processing in the laboratory can be compared to the industry in processing because it was found that the technological properties of the specimens resulting from different processed powders, obtained similar characteristics, with improving only in linear shrinkage.

Bentonite clays from the municipality of Boa Vista - PB have a high percentage of contaminants or coarse fractions, providing unsatisfactory rheological results for application in drilling fluids of oil wells. A purification process is necessary in order to improve the rheological behavior of these dispersions and to adapt them to the standards required by Petrobrás EP-1EP-00011-A, 2011 and API 13A, 1993.The properties of the drilling fluids as the cost of it are of extreme importance to the successful completion of an oil well. Specifically, the cations have a direct influence on the rheological behavior of these fluids. Li+ is in the first place in the selectivity plane of these cations. It has already been studied that Li2CO3, although having a high cost, presents extremely satisfactory rheological results for the application desired here. However, a more in-depth study on the improvement that this carbonate causes in all rheological properties becomes necessary. The aim of this research is to study the optimization of a bentonite clay activation from Paraíba (Verde Lodo) by different methods, as well as to evaluate the influence of lithium content on the rheological properties of aqueous and non-aqueous fluids. To this end, in addition to the traditional method (Padua) of additivation, this work, in an unprecedented way, analyzes three other methods (hot, cold and aged at 40ºC), with the aim of reducing curing time, thus optimizing the cost and production on the industrial scale. First the samples were characterized by XRD, XRF, SEM, CEC, LALLS and TGA / DTA. Then, the study was divided into two parts, where in part I was carried out the study of the rheological behavior of the purified and additive samples for water based drilling fluids.After this process, the samples were organophilized and again characterized by XRD and TGA / DTA. In part II, the apparent viscosity was studied in order to verify the compatibility in forming dispersions for nonaqueous drilling fluids based on Petrobrás standard EP-1EP-00023-A, 2011, and the flow curves were analyzed. In order to guarantee the robustness of the tests of this work, a statistical analysis was carried out, in order to evaluate the influence of the lithium content, besides the method of additivation. From the results, it was possible to infer that the traditional method can easily be replaced by the aged at 40ºC, since the statistical results show a very strong correlation of 97% between them, at a level of significance of 95% (α=5%).

It is estimated that the economic potential of nanofibers is now worth $ 14 billion, but exploiting this potential depends directly on the development of new techniques so that fibers are obtained with lower cost and higher efficiency. Given this scenario, the objective of the study was to obtain zein fibers with nano and micrometer diameter with the aid of an electrospinning system and meet the physicochemical properties of the fibers. The zein is a protein from corn and contains various types of amino acid residues. The electrospinning system is the most widely used systems for obtaining nanofibers. An ethanol / water system was used to assess the addition of a nonsolvent to the biopolymer. Pure fibers were evaluated and fibers containing progesterone (P4) and medroxyprogesterone (MP4). The morphology of the fibers was investigated by scanning electron microscopy (MEV) as a function of several variables such as concentration of biopolymer in solution, solvent and nonsolvent. A systematic study of these variables was obtained and the quantitative relationship between these parameters and the mean diameter and standard deviation of fibers has been established. The obtained nanofibers were characterized by various analytical steps, and the effect of the presence of progesterone and medroxyprogesterone on the morphology, thermal and crystallographic properties was determined. The results indicate the possibility of controlling the morphology of the fibers through the control solution variables (concentration of biopolymer, solvent and presence of non-solvent). The addition of water as non-solvent produced more homogeneous fiber, studies have shown that different parameters directly influence the production of the fibers. Morphological analysis showed that the measure which increases the amount of hormone also increases the presence of beads in the structure thereof. In conclusion queo system has great potential for the production of controlled release systems.

Sustainable development drives companies to take steps to assist in minimizing the environmental impact. In the state of Paraiba there are about 140 red ceramic enterprises daily discarding lot of waste from failures of the production system. This type of waste is not easily reincorporated in nature, constituting a product which causes environmental impact. This research seeks to do the complete characterization of this material aimed at its use in mortar with Portland cement. The residue was collected in a partner industry and reduced through three different methods of fineness analysis, when it chose the most convenient. Then were made the chemical, mineralogical, physical characterization and pozzolanic activity by three methods: with lime; Portland cement; and the Chappelle modified method. They used two ceramic residues: blocks and roof tiles. The same time, were also featured two pozzolans used in local cement factories and two industrial metacaulins. The results indicated that the residue in the study did not deal with a very reactive pozzolan, because of the relatively low degree of amorphization, demonstrated by the Rietveld method. However, they performed well in the test pozzolanic activity with lime. The ceramic waste were then used as a cement replacement material in an industrialized mortar, at 0%; 10%; 15%, 20% and 25% content. Properties were obtained such as density, water retention, ultrasonic wave propagation velocity, dynamic modulus of elasticity and compressive strength at ages 7, 28 and 56 days, as well as to analyze water absorption by capillarity. The results showed the presence of ceramic wastes slightly interfere in the mortar properties, allowing to obtain loads close to the reference mortar with Portland cement economy. On day 56, all exceeded 5 MPa of resistance. In addition, a flowable mortar for flooring was developed. Made fluidity study of the paste, has come up to a 20% cement replacement content with good rheology and load higher than 20 MPa. Therefore, the industrial residue in question has strong potential application in mortars, and their use therein on a large scale can make the most ecologically clean business partner, setting an example for the local ceramist branch, and contribute to the sustainable development of the region.

Brazil already produces more than 2 million barrels-per-day and this has a production forecast to increase in the coming years, when platforms had been operating at full potential. Increase in exploration directly affects the constituent alloy carbon steel to transport oil through the pipeline, increasing the oxidation caused mainly by sulfur elements and holders of hydrogen, whose main compound is H2S. Therefore, it is essential investments in the discovery of new methods to improve the protection and useful life of these materials. Given these problems, this work had been conducted to develop three different composites for adsorption of H2S composed by epoxy resin, bentonite particles, ZnO and ZnO supported on bentonite, as potential adsorbent materials, obtained by synthesis using the Pechini modified method. A study was conducted to investigate the behavior of the resin, using DSC with isotherms at 35, 50, 75 and 125C° and a dynamic rheometer for setting the temperature and time of heating for the application and reception of the particles using the Solution Blow Spinning technique. The bentonite was tested in different solvents with dispersant to form a suspension with the best stability. The concentration of 10% m/v in water was selected and the suspensions with Bentonite, ZnO and Bentonite/ZnO were prepared. The best coatings obtained were formed after heating the resin under 50°C with times of 16.3 and 33.3 minutes. The materials were analyzed with XRD, IR, UV-VIS and XRF. The suspensions were evaluated by a study of viscosity using a dispersant, with the good result only for the bentonite suspension. The composites were analyzed by SEM, XRD, optical microscopy and energy dispersive (EDS) to verify the presence of inorganic elements on the coating, allowing the process of adsorption.

In the emerging field of nanostructured materials, there are the polymeric nanofibers, because to its large number of possible applications, such as in drug delivery systems because of their ability to bioabsorbilidade and controlling the rate of active substances encapsulated. The nanofibers may be produced by various techniques, including blow spinning solution (SBS), which can be used to produce micro and nanofibers at lower cost compared to other techniques. One of the most commonly used polymers for this purpose is poly (lactic acid) PLA, due to its biodegradability and biocompatibility. The aim of this study was to produce micro and nanofibers of PLA, using the SBS technique, with and without the addition of different contents of candeia (Eremanthus erythropappus) essential oil and its main fitoconstituint, the α-bisabolol. Due to the hydrophobicity of the PLA, as well known, they have also been produced webs containing DMSO, which acted as a surfactant since it is an organic compound with high hygroscopic capacity. Produced mats were characterized by SEM, TGA, DSC, XRD and FTIR. Results showed the immiscible nature of the produced polymer solutions. The addition of DMSO, of candeia oil and the α-bisabolol generated an increase in fiber diameters, as well as its distribution. The crystallographic analysis showed the semi-crystalline nature of the PLA, and a result contrary to that found in DSC for crystallinity, which was not discarded because it is different techniques. It can be concluded micro- and nanofibers of PLA with the addition of candeia oil and α-bisabolol were successfully produced by the SBS technique and that, in relation to the physicochemical properties of the mats produced, there was no differences encapsulate the candeia oil or α-bisabolol in nanofibers of PLA. The candeia oil potential applicant for use in polymeric nanostructured devices. This, according to the literature and after a few tests, such as the evaluation of antimicrobial activity, for example, could confirm their use in a drug delivery system in biomedical applications, as well as in various other cosmetic applications.

In this work, glycerol-derived polymers for controlled release of fertilizers were developed. Such systems aim to minimize fertilizer leaching and avoid groundwater contamination. Thermosetting polyesters were produced by polycondensation of glycerol with citric, adipic and succinic acids, to produce poly(glycerol adipate)-PGA, poly(glycerol citrate)-PGC, poly(glycerol succinate)PGSU, poly(glycerol l adipate -co-citrate) - PGCA, and poly(glycerol citrate cosuccinate) -PGCSU. These polymers with different hydrophobicity de grees were used to encapsulate 0; 2.5; 5; 10, 20 and 40 wt.% KCl. Polymers and polymers/fertilizer were characterized by differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Results showed that all polymers are amorphous, as expected, and thermally stable up to 200°C.Moreover, depending on the comonomer, polymers were brittle and fragile or rubbery.KCl release studies were performed using UV-Vis spectrophotometry to release times of up to 120 h. Release profiles were dependent on the type of polymer obtained and therefore on its hydrophobicity/hydrophilicity, i.e., the release profile was modulated by the choice of comonomers used. These results indicate that it was possible to develop controlled release systems for fertilizers, adding value to glycerol and modulating profile release by the choice of polymer produced and quantity of the nutrient added.