Filmes de nanocompósitos de polímero condutor, nanopartículas de argila e nanopartículas de ouro para aplicação em sensores ambientais

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

Análise dosimétrica de perfis de distribuições radiais de doses relativas de um aplicador de betaterapia de 90Sr+90Y utilizando o código MCNP-4C e filmes raiocrômicos

Although they are no longer manufactured, the applicators of 90Sr +90Y acquired in the decades of 1990 are still in use, by having half-life of 28.5 years. These applicators have calibration certificate given by their manufacturers, where few have been recalibrated. Thus it becomes necessary to accomplish thorough dosimetry of these applicators. This paper presents a dosimetric analysis distribution radial dose profiles for emitted by an 90Sr+90Y betatherapy applicator, using the MCNP-4C code to simulate the distribution radial dose profiles and radiochromium films to get them experimentally . The results with the simulated values were compared with the results of experimental measurements, where both curves show similar behavior, which may validate the use of MCNP-4C and radiochromium films for this type of dosimetry

Descarte dos componentes de filmes radiográficos e aventais de chumbo utilizados nas clínicas odontológica ou radiológica

Várias resoluções e leis visam minimizar e/ou adequar os resíduos gerados, dentre outros aspectos. Nesse sentido, a Disciplina de Radiologia, funcionários que trabalham no setor e docentes ligados a biossegurança e sustentabilidade ambiental estudaram as referidas normas e leis, além de artigos científicos relacionados ao descarte dos resíduos gerados em radiologia para realizar o descarte correto desses materiais e para orientar e conscientizar os acadêmicos sobre o assunto. Verificou-se que os resíduos gerados com a radiografia convencional são considerados resíduos químicos (tipo B) e devem ser descartado separadamente dos resíduos tipo A (infectantes), C (radioativos), D (comum) e dos E (perfuro-cortantes), visto que podem ser reutilizados, recuperados ou reciclados, e em última instância, podem ser dispostos em aterro de resíduos perigosos Classe I.

Preparação e caracterização óptica de filmes de ORMOSIL obtidos via processo sol-gel dopados com azocorantes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Determinação in situ de metilmercúrio e mercúrio (II) em sistemas aquáticos nas proximidades de refinarias de petróleo, utilizando a técnica difusão em filmes finos por gradiente de concentração (DGT)

Pós-graduação em Geociências e Meio Ambiente - IGCE

Caracterização de Filmes a-C:H:Cl e a-C:H:Si:Cl produzidos por deposição à vapor químico assistido por plasma (PECVD) e deposição e implantação iônica por imersão em plasma (PIIID)

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Micropartículas de goma gelana revestidas com filmes de amido resistente/pectina como estratégia para administração oral de insulina

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

Obtenção de massa de mandioca com adição de maltodextrina de amido de milho waxy

This study aimed to the development of cassava mashed with added maltodextrin of waxy maize starch as an alternative to the semi-ready product. The experimental design was completely randomized using blocks in 4x7 factorial, with three replications. The treatments were the combination of maltodextrin concentrations added in the cassava mass (0, 5, 10 and 15% on dry weight) with storage time (0, 2, 4, 6, 8, 10 and 12 days after preparation) and two condition (environment and refrigerated temperature). The variety chosen to the processing was the IAC 576-70. The data were subjected to variance analysis. The means were compared by Tukey test at 5%. The content of maltodextrin from waxy maize starch to 15% was effective in controlling the increase of texture. The mass of cassava with the addition of maltodextrin showed to be product of easy preparation, showin IAC 576-70g viability to be produced in industrial scale.

Processo de flotação no tratamento da manipueira originada da fabricação de farinha de mandioca

Este trabalho teve como objetivo estudar o tratamento da manipueira pelo processo de flotação, visando estabelecer os melhores parâmetros operacionais a serem adotados, sem o uso de agentes químicos. Foram realizados os tratamentos em dois tipos de processo de flotação: por ar dissolvido e ar induzido, sendo as colunas desenvolvidas em acrílico e PVC para operação contínua em uma planta piloto. Os dois sistemas de flotação não demonstraram diferenças em relação à recuperção de proteínas, amidos e matéria graxa, porém, o processo de flotação por ar dissolvido torna a manipueira diluída devido ao volume de água utilizada, o que acaba gerando um volume de resíduo ainda maior e aumentando o custo do processo. Utilizando o processo por ar induzido, foram realizados ensaios variando vazão e temperatura, sendo os melhores resultados obtidos nas seguintes condições: vazão na faixa entre 120 e 420 mL/min e temperatura na faixa de 33 a 36 °C. Foi observada uma redução nos percentuais de remoção de matéria graxa e proteínas de 44,4% e 32,8%, respectivamente.

Análise energética de sistemas de produção de etanol de mandioca, cana-de-açúcar e milho

The objective of this work was the analysis of the energetic ethanol production systems using as source of carbohydrates, manioc, sugar cane and maize crops. The searches were carried from the field in the Paranapanema River Valley, state of Sao Paulo in the operations of cultivation and industrial processing of raw materials for analysis. The expenditure of energy concerning the agricultural part was made by the energy consumption of stage production of one hectare of sugar cane, cassava and corn, tillage and planting procedure, inputs, driving the crop, harvest, transport industry and energy draining. The expenditure of energy referring to the part was made by the industry energy consumption of stage processing of one tonne of sugar cane, cassava and corn, in the operations of disintegration / milling, hydrolysis / treatment of the broth, fermentation, distillation and maintenance of equipment. Under the system of agronomic production of raw materials, manioc presented an energy expenditure below that of sugar cane and maize (9,528.33 MJ ha-1; 14,370.90 MJ ha-1 and 15,633.83 MJ ha-1, respectively). For the ethanol produced, the operations of cultivation has consumed 1.54 MJ l-1 with manioc; MJ 1.99 l-1 with sugar cane, and 7.9 MJ l-1 with the corn. In the industrial processing of a ton of raw material, sugar cane presented an energy cost less than the cassava and maize (1,641.56 MJ t-1; 2,208.28 MJ t-1 and MJ 3,882.39 t-1, Respectively), however, showed a higher cost than when they related to ethanol produced (19.38 MJ l-1; 11.76 MJ l-1 and 11.76 MJ l-1, respectively). In the final energy balance for each megajoules of energy invested in sugar cane were required 1.09 MJ (9%), for each megajoules of energy invested in manioc were required 1.76 MJ (76%) and for each megajoules energy invested in maize were required 1.19 MJ (19%). Overall, it appears that the manioc consumes less energy than sugar cane and corn crops in the process of agribusiness obtaining ethanol.

Modificação de amido de mandioca com peróxido de hidrogênio e ácido lático em diferentes processos de secagem

The oxidized cassava starch is widely used in various industrial sectors, the major textile, paper and more recently by the food industry due to its characteristics, such as expansion property to baking. This study aimed to develop a modification of cassava starch by reaction with hydrogen peroxide and lactic acid, with two different types of drying, in the sun and in oven dried, in order to develop the expansion with increase of carboxyl groups and to evaluate differences between the types of drying and compare them with Expandex® starch and pre-gelatinized. The results indicated an increase in the rate of expansion of the modified starch dry in the sun, however the results of the content carboxylic groups haven't indicated the relationship with their rate expansion.

Utilização de resíduos agronômicos da mandioca para fabricação de papéis especiais como recurso alternativo para a comunicação visual

The air part of the cassava is a residue which presents possibilities of being used as a non-wooden raw material in the production of pulp due to the fact that its 81 % of the adult plants air part, besides having high availability and presenting a high concentration of fibers. Studies were developed with the purpose of producing the pulps through the kraft process, which is a mix of the Na2S and NaOH in water heated up to the temperature of 160º C for about 90 minutes to the extraction of lignin. The paper sheets obtained in the practices went through an experimenting process. Studies related to the paper characteristics were accomplished in order to assess its use in the visual communication through printing techniques, silk screen, pictures and others graphical processes. The research results are able to conclude the utilization viability of this material in graphics communication.

Caracterização dos resíduos do processamento de mandioca para produção de bioetanol

Aiming to get the best economic advantage in ethanol production from cassava roots, this study presented a physiochemical characterization from two different types of solid waste in two types of processing of the raw materials in manufacturing ethanol. The processing of cassava roots begins with the disintegration and washing the roots with the addition of 20% more water to obtain a pulp which was treated and stirred in the reactor while adding enzyme α-amylase at a temperature of 90°C for 2 hours. Then we performed a pH adjustment while lowering the temperature to 60 ° C with the addition of the enzyme amiloglucosidase and then stirring for 14 hours. The hydrolyzate obtained was the source of two types of waste which are: i) Solid residue obtained after filtration of the hydrolyatze and ii) Solid waste obtained from filtering wine after alcoholic fermentation of the hydrolyzate with the addition of a dried yeast strain Y-940 manufactured by MAURI OF BRAZIL SA (2%) at a temperature of 25º C. The results of the laboratory analysis showed that the byproducts derived from the hydrolysis and fermentation showed very similar chemical compositions. With levels between 39 and 41% fiber, 0.5% lipids, 20 and 30% carbohydrates, protein 0.5 and 1.50, 6 and 8% acidity, and 20 and 30% soluble solids.

Estrutura supramolecular de um derivado de perileno em filmes finos fabricados por evaporação térmica a vácuo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização de filmes de BaxSr1-xTiO3 Sintetizados pelo método hidrotermal assistido por micro-ondas e depositados por eletroforese

Pós-graduação em Ciência e Tecnologia de Materiais - FC