1000 resultados para aditivo alimentar


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The evaluation of public policies that promote Food Security and Nutrition (FSN) it s a multidisciplinary activity extremely relevant to the effectiveness of actions to legitimize the Human Right to Adequate Food (HRAF). This study aimed at assessing the effectiveness of the unit project Natal-RN Café do Trabalhador in promoting SAN to its users. The theoretical framework is based on the public and political and on the dimensions of the concept of FSN (quantity and quality-regularity). Through a qualitative approach, methodologically this was the work of an evaluation of efficiency of the unit Natal-RN of Café do Trabalhador project in light of the assumptions of the concept of SAN. Data collection was conducted through retrospective archival research in official documents of the project, semi-structured interviews with managers involved in its implementation (representative of the Secretary of State for Employment, Housing and Care of RN SETHAS and third party), socioeconomic questionnaire applied to the users of the unit, check the amount, regularity and quality of meals offered for 15 days (menu routine) using the descriptive form menu and form filling type checklist for verification of compliance with good practices . Methods of analysis, we used content analysis, descriptive statistics and compared to previously established parameters for the project. As categories of analysis were defined organizational arrangement, access, user, food quantity-regularity and food quality. The results show that, it was found in the category arrangement that will implement the project dismissed technical criteria for choosing the districts and the quantitative distribution of meals for each location. It was found that the valuation of the shares of the company outsources technical SETHA has not been performed. We observed in the access category, the unit has a strategic location, but lack of space in the refectory. The main obstacle to economic access for users is the lack of a register for the beneficiaries. In the category of users, it was identified that the clientele of the project it is predominantly men, with more than 51 years, low education, earning wages less 1 obtained through informal employment, which they move up through the unit transport collective, go to all days of operation due primarily to price. About the meals category quantity-regularity of food showed that the menu serves 95% of the desired needs, and that holidays and weekends are periods of disrupting the regularity of supply of meals. Regarding the category of food quality, it was found that the nutritional aspect on the menu are food sources rich in sodium, nitrates and low in fiber. In the aspect of hygiene and sanitation are the main limitations related to waste management, lack of exposure controls of food prepared and inadequacies of the physical structure. The results showed that in general and the institutional arrangement of the organs attached to the project should establish a systematic evaluation project is to establish as a promoter of and FSN overcome these obstacles

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Cementing operations are conducted at different times of the well s life and they have high importance, because the functions are fundamental to keep good properties during a long life of the well, such as, maintain the mechanical stability of the well, to promote the isolation hydraulic and support the tubing. In some situations, the rocky zones have low fractures pressures and require the use of lightweight slurries to prevent the hydrostatic pressure in the formation is greater than the pressure of fracture. There are three ways to reduce the density of cement slurries: exterders water additives, microspheres and foamed slurries. The most used extender water additive is sodium bentonite, which is a clay with a good capacity of water absorption and expansion of its volume, the main disadvantage of this additive is the reduction of the strength. Currently, the use of nanoscale particles has received special attention, mainly because they get new functionalities. Following this trend, this paper aims to use a colloidal solution of nano-silica as an exterders water additives for use in oil wells. Slurries were designed with fixed 13lb/gal density and concentration of nano silica 0.1 gpc; 0.4 gpc; 0.7 and 1gpc, the influence of nano-silica was studied at these levels in isolation and combined varying concentrations of CaCl2,. Tests including rheology, stability, strength, thickening time, porosity and permeability. Besides the API tests, microstructural characterizations were performed after 28 days of the slurries, X-ray diffraction (XRD) and scanning electron microscopy (SEM)

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Tesis (Zootecnista). -- Universidad de La Salle. Facultad de Ciencias Agropecuarias. Programa de Zootecnia, 2013

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Generally, cellulose ethers improves mortar properties such as water retention, workability and setting time, along with adherence to the substrate. However, a major disadvantage of the addition of cellulose ethers in mortars is the delay in hydration of the cement. In this paper a cellulose phosphate (Cp) was synthesized water soluble and has been evaluated the effect of their incorporation into mortar based on Portland cement. Cellulose phosphate obtained was characterized by spectrophotometry Fourier transform infrared (FTIR), X-ray diffraction (XRD), elemental analysis and scanning electron microscopy (SEM). Mortar compositions were formulated with varying phosphorus content in cellulose and cellulose phosphate concentrations, when used in partial or total replacement of the commercial additive based hydroxyethyl methyl cellulose (HEMC). The mortars formulated with additives were prepared and characterized by: testing in the fresh state (consistency index, water retention, bulk density and air content incorporated) and in the hardened state (absorption by capillarity, density, flexural and compression strength). In mixtures the proportion of sand:cement of 1:5 (v / v) and factor a / c = 1.31 and water were held constant. Overall, the results showed that the celluloses phosphates employed in mortars added acted significantly when partially substituting the commercial additive. With regard to consistency index, water retention and bulk density in the fresh state and absorption by capillarity and bulk density apparent in the hardened state, showed no appreciable differences as compared to the commercial additive. The incorporated air content in the fresh state reduced markedly, but did not affect other properties. The mortars with cellulose phosphate, partially replacing the commercial additive showed an improvement of the properties of flexural strength and compressive strength

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Dissertação de mest. em Estudos Marinhos e Costeiros, especialização em Aquacultura, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Univ. do Algarve, 1994

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Dissertação de mest. em Estudos Marinhos e costeiros, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Univ. do Algarve, 1998

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Dissertação de dout. em Economia (Economia da empresa dos mercados e produtos), Faculdade de Economia, Univ. do Algarve, 2005

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Fuel cells are considered one of the most promising ways of converting electrical energy due to its high yield and by using hydrogen (as fuel) which is considered one of the most important source of clean energy for the future. Rare earths doped ceria has been widely investigated as an alternative material for the electrolyte of solid oxide fuel cells (SOFCs) due to its high ionic conductivity at low operating temperatures compared with the traditional electrolytes based on stabilized zirconia. This work investigates the effect of gallium oxide (Gallia) as a sintering aid in Eu doped ceria ceramic electrolytes since this effect has already been investigated for Gd, Sm and Y doped ceria electrolytes. The desired goal with the use of a sintering aid is to reduce the sintering temperature aiming to produce dense ceramics. In this study we investigated the effects on densification, microstructure and ionic conduction caused by different molar fraction of the dopants europium (10, 15 and 20%) and gallium oxide (0.3, 0.6 and 0.9%) in samples sintered at 1300, 1350 and 1450 0 C. Samaria (10 and 20%) doped ceria samples sintered between 1350 and 1450 °C were used as reference. Samples were synthesized using the cation complexation method. The ceramics powders were characterized by XRF, XRD and SEM, while the sintered samples were investigated by its relative density, SEM and impedance spectroscopy. It was showed that gallia contents up to 0.6% act as excellent sintering aids in Eu doped ceria. Above this aid content, gallia addition does not promote significant increase in density of the ceramics. In Ga free samples the larger densification were accomplished with Eu 15% molar, effect expressed in the microstructure with higher grain growth although reduced and surrounded by many open pores. Relative densities greater than 95 % were obtained by sintering between 1300 and 1350 °C against the usual range 1500 - 1600 0 C. Samples containing 10% of Sm and 0.9% of Ga reached 96% of theoretical density by sintering at 1350 0 C for 3h, a gain compared to 97% achieved with 20% of Sm and 1% of Ga co-doped cerias sintered at 1450 0 C for 24 h as described in the literature. It is found that the addition of gallia in the Eu doped ceria has a positive effect on the grain conductivity and a negative one in the grain boundary conductivity resulting in a small decrease in the total conductivity which will not compromise its application as sintering aids in ceria based electrolytes. Typical total conductivity values at 600 and 700 °C, around 10 and 30 mS.cm -1 respectively were reached in this study. Samples with 15% of Eu and 0.9 % of Ga sintered at 1300 and 1350 °C showed relative densities greater than 96% and total conductivity (measured at 700 °C) between 20 and 33 mS.cm -1 . The simultaneous sintering of the electrolyte with the anode is one of the goals of research in materials for SOFCs. The results obtained in this study suggest that dense Eu and Ga co-doped ceria electrolytes with good ionic conductivity can be sintered simultaneously with the anode at temperatures below 1350 °C, the usual temperature for firing porous anode materials

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A caprinocultura na reglao semi-árida do Nordeste se caracteriza pela extensividade e por baixos níveis de produtividade decorrentes, principalmente, da acentuada variação estacional na oferta de forragem da caatinga, a qual constitui sua base alimentar. Existe um consenso quanto a necessidade de suplementar os animais nos períodos críticos, tanto com energia como com proteína. As alternativas atualmente disponíveis, como a palma forrageira (Opuntia ficus indica Mill), os restolhos de cultura, e o capim buffel (Cenchrus ciliaris) sao volumosos de reduzido valor energético e são mais utilizados dentro de um enfoque de sobrevivência dos animais. Os suplementos de maior valor nutritivo são de uso limitado e apresentam problemas de economicidade. As perspectivas de uso da ureia, da leucena (Leucaena leucocephala (Lam.) de Wit) e do guandu (Cajanus cajan (L.) Millsp) na suplementaçao de caprinos no semi-árido, são discutidas com base no seu potencial como fontes de nutrientes e como alternativas adaptáveis às condições agro-ecológicas e sócio-econômicas da região.

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A globalização e competitividade do presente século a nível organizacional, exige uma melhoria contínua, do seu capital humano, de forma a conseguirem garantir o seu crescimento e sobrevivência a longo prazo. Os novos líderes do século XXI denotam elevada protuberância na gestão do capital humano das organizações. Os líderes dotados de inteligência emocional, elevam o potencial dos seus liderados e permitem criar um ambiente ressonante entre os elementos da sua equipa. Um líder que consiga ser emocionalmente inteligente, gera empatia entre os seus liderados, criando laços fortes de pertença entre si e a sua equipa, conseguindo então libertar, o maior potencial dos seus liderados, tornando-os mais competentes e eficazes, no alcance de objectivos em prol da organização. O líder com inteligência emocional, é o novo tipo de líder desejado, neste clima conturbado que atravessamos. A presente dissertação, centra-se em temas relacionados com Liderança, Tipos de Liderança, Inteligência Emocional, Equipas, e Eficácia de Equipas. Com base na pesquisa bibliográfica e empírica realizada em uma organização, que envolve líderes e liderados, procura-se compreender se o tipo de liderança aplicada influencia a inteligência emocional dos liderados e por sua vez se a inteligência emocional dos liderados influencia a eficácia das equipas de trabalho.

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O Manual de Alergia Alimentar para a Restauração foi criado com o objetivo de informar, educar e ajudar os setores da restauração, hotelaria e turismo a lidar com a alergia alimentar e com as novas disposições previstas no regulamento 1169/2011 da União Europeia. O presente manual inclui assim componentes educacionais e práticas na abordagem à alergia alimentar na restauração, não tendo caráter vinculativo ou legal, nem substituindo a abordagem médica ou nutricional no diagnóstico e tratamento da doença. A informação disponível relativamente à presença de alergénios nos alimentos processados e preparações culinárias é exemplificativa, permitindo a adaptação ao desenvolvimento de novos géneros alimentícios e receitas culinárias. Todos os contributos e informações adicionais poderão assim ser remetidos para o Centro de Competências de Alergia Alimentar da Universidade do Porto, de forma a contribuir para a melhoria contínua do manual e dos serviços prestados pela restauração aos clientes com alergia alimentar.

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O presente trabalho realizado na comunidade São Francisco/Uruá, localizada no município de Autazes ? AM levantou questões sobre alimentação, produção agrícola e soberania alimentar. Considerando a importância dos temas para o fortalecimento da agricultura sustentável na Amazônia, preocupa a adoção de práticas provenientes da agricultura ?moderna? ou agronegócio, como o plantio em monocultivos, técnica essa, que reduz a diversidade na produção nos sistemas agroalimentares dos moradores levando ao aumento de consumo de alimentos industrializados e interferindo na cultura alimentar das populações locais. O método de pesquisa adotado foi o Estudo de Caso e lançou mão de metodologias participativas utilizando ferramentas como questionário semiestruturado, observação participante, conversa informal e relatos de moradores da comunidade. A pesquisa procurou ter uma visão crítica da realidade baseada no estudo da complexidade dos múltiplos casos que a agricultura familiar da Amazônia apresenta.

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Feeding behavior of the larvae's prawn, Macrobrachium rosenbergii de Man, 1879, in each stage of development was studied face alArtemia Linnaeus, 1758 nauplii, dry and wet diets. Groups of ten larvae in each stage were placed in 500 ml beakers at 29ºC in filtered brackish water. After the fasting period of acclimatization, the three types of food were offered separately to the larvae and the feeding behavior was observed during 30 min. Feeding perception, capture, grasp and ingestion of food were used to determine feeding pattern. Stage I lawac do not eat. The feeding behavior of larvae was similar on the stages II - XI. The perception in distance does not occur in most individuais; the feeding process generally started with the physrcal contact of food with the animal. Food is captured by thoracic appendages (maxillipeds until stage III, and maxillipeds + pereopods in stages IV - XI) and particles are grasped and handled by maxillipeds. Inopposition at the capture, the ingestion is a seletive process. Selective responses decrease in later stages and larvae become omnivorous in greater degree.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Instituto de Física, Instituto de Química, Faculdade UnB Planaltina, Programa de Pós-Graduação em Ensino de Ciências, Mestrado Profissional em Ensino de Ciências, 2016.