Producing xylan/Eudragit (R) S100-based microparticles by chemical and physico-mechanical approaches as carriers for 5-aminosalicylic acid

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação de compósitos á base de celulose bacteriana-hidroxiapatita com peptídeo osteogênico para reparação óssea

Pós-graduação em Odontologia - FOAR

O ambiente educativo e o desenvolvimento do indivíduo portador do transtorno do déficit de atenção e hiperatividade (TDAH)

The pedagogical context can become a mediator between teaching and learning process. In a research conducted to obtain a Master’s degree, I could see how intentional organized environment refl ects in the knowledge appropriation and internalization historically produced. The objective of this study is to raise hypothesis about the favoring of the potentiating context of learning in the development of the individual with the Attention Defi cit Hyperactivity Disorder (ADHD) as well as on the organization of pedagogic environment to mediate the actions of teaching and reading learning. It is the concern to meet children with behavior considered inappropriate for the classroom environment and failure before situations that involve them. The hypothesis is that when the teaching and learning environment provides motivation to the student and awakens in him the desire to produce knowledge and take ownership of it, it is possible that it may have a potentiating development of learning. As theoretical support, I used texts from Luria (1987, 1994), Vygotsky (1994), Vigotskii, Luria and Leontiev (1998), Beaton (2005),Graeff and Vaz (2008), Pastura, Mattos and Araujo (2005). The bibliographic research was the methodology used for the study.

Formação do leitor: projeto educativo e constituição humana

The discussion about reading as a cultural practice is a requirement that points to the school relevance to take itself as a social space of meanings construction and the need to use methodologies that focus on the knowledge construction process and the individual development in considering the teaching dynamics that encourage the strategies discovery for individual and collective work, facilitating that human culture object appropriation . The focus is on the relationships in the classroom and school context mediated by language to written language acquisition, with emphasis on reading. This study intends to contribute for the refl ection on the pedagogical implications derived from the organization of a teaching context, intentionally aimed at the teaching organization of reading strategies in the written language acquisition process. The hypothesis is that the reading strategies contribute to the contexts organization with pedagogical coherent and to the competent reader formation during the education act. The studies are based on Brazilian educators Girotto; SOUZA, 2010) and on North American educators (HAMPTON & Resnick, 2008; OWOCKI, 2003; WEDWICH & Wutz, 2008; HARVEY AND GOUDVINS, 2007), with the action research methodology.

Evaluation of the biotechnological potential of Rhizobium tropici strains for exopolysaccharide production

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

Estudo da contribuição do espalhamento nuclear não elástico na trajetória mais provável de prótons em alvo homogêneo composto de água

The Therapy with proton beam has shown more e ective than Radiotherapy for oncology treatment. However, to its planning use photon beam Computing Tomography that not considers the fundamentals di erences the interaction with the matter between X-rays and Protons. Nowadays, there is a great e ort to develop Tomography with proton beam. In this way it is necessary to know the most likely trajectory of proton beam to image reconstruction. In this work was realized calculus of the most likely trajectory of proton beam in homogeneous target compound with water that was considered the inelastic nuclear interaction. Other calculus was the analytical calculation of lateral de ection of proton beam. In the calculation were utilized programs that use Monte Carlo Method: SRIM 2006 (Stopping and Range of Ions in Matter ), MCNPX (Monte Carlo N-Particle eXtended) v2.50. And to analytical calculation was employed the software Wolfram Mathematica v7.0. We obtained how di erent nuclear reaction models modify the trajectory of proton beam and the comparative between analytical and Monte Carlo method

Microencapsulação de óleo de palma por coacervação complexa em matrizes de gelatina/goma arábica e gelatina/alginato

Pós-graduação em Engenharia e Ciência de Alimentos - IBILCE

Alginate/PVA beads for levan production by Zymomonas mobilis

The levan is a biopolymer of great importance to the food industry since it is capable of defining and modifying the structure of one food, acting as stabilizer, thickener, gelling agent and being largely responsible for the texture of processed foods. The levan production by bacterial cell immobilization may potentialize the results of these studies, having advantages such as: high cell concentrations inside the reactor, increase the substrate absorption rate, improve the performance and reduce the risk of microbial contamination. Thus, this study aims to evaluate the levan production by immobilized Zymomonas mobilis in hybrid system of alginate/polyvinyl alcohol (PVA) when submitted to different sucrose concentrations (5, 10, 25 and 30%), pH (5.7 and 7.0) and incubation temperature of 30C for 12, 18 and 24 h. The results showed that the best levan production rate was 18.66 g/L at 30% sucrose concentration, with productivity 1.55 g/L/h at pH 7.0.

Bioconversion of Cellulose to Hydrogen by dark fermentation

Hydrogen is known as a clean energy resource. The biological production of hydrogen has been attracting attention as an environmentally friendly processs that does not consume fossil fuels. Cellulosic plant and waste materials are potential resources for fermentative hydrogen production. Cellulose is a linear biopolymer of glucose molecules, connected by β-1,4-glycosidic bonds. Enzymatic hydrolysis of cellulose requires the presence of cellulase. The present study aimed to investigate the efficiency of acid pretreatment on ruminal fluid in order to enrich H2 producing bacteria consortia to enhance biohydrogen rate and substrate removal efficiency. In this study, fermentative hydrogen producers were enriched on cellulose (2g/L) in a modificated Del Nery medium (DNM) at 37ºC and initial pH 7.0 using rumen fluid (10% v/v) as inoculum. To increase the hydrogen production it was added cellulose (10mL) to the medium. The gas products (mainly H2 and CO2) was analyzed by gas chromatography (Shimadzu GC 2010) using a thermal conductivity detector. The volatile fatty acids and ethanol were also detected by GC using a flame ionization detector. Cellulose degradation was quantified by using the phenolsulfuric acid method. Analysis showed that the biogas produced from the anaerobic fermentation contained only hydrogen and carbon dioxide, without detectable methane after acid pretreatment test. On DNM the hydrogen production started with 4 h (5,3 x 105 mmol H2/L) of incubation, and the maximum H2 concentration was observed with 34 h (7,1 x 106 mmol H2/L) of incubation. During the process, it was observed a predominance of acetic acid and butyric acid as well as a low production of acetone, ethanol and nbutanol in all experimental phases. Butyrate accounted for more than 77% of total. As a result of the accumulation of volatile fatty acids (VFAs), the pH value in anaerobic digestion system was reduced to 4,0. On microscopy analyses there were observed rods with endospores. The batch anaerobic fermentation assays performed on anaerobic mixed inoculum from rumen fluid demonstrated the feasibility of H2 generation utilizing cellulose as substrate. Based on the results, it can be concluded that the acid treatment was efficient to inhibit the methanogenic archaea cells present in rumen fluid. The rumen fluid cells present a potential route in converting renewable biomass such as cellulose into hydrogen energy.

Utilização de melaço, manipueira e soro de queijo como substratos para produção de biossurfactante por Bacillus Pumilus e sua aplicação em biorremediação de solo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

The effects of heat-moisture treatment on avocado starch granules: thermoanalytical and structural analysis

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Electronic structure calculations of ESR parameters of melanin units

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

Purification and characterization of a unique pectin lyase from aspergillus giganteus able to release unsaturated monogalacturonate during pectin degradation

A pectin lyase, named PLIII, was purified to homogeneity from the culture filtrate of Aspergillus giganteus grown in submerged culture containing orange peel waste as carbon source. PLIII was able to digest apple pectin and citrus pectins with different degrees of methyl esterification. Interestingly, the PLIII activity was stimulated in the presence of some divalent cations including Pb(2+) and was not significantly affected by Hg(2+). Like other pectin lyases, PLIII is stimulated by but is not dependent on Ca(2+). The main soluble product released during the degradation of pectic substances promoted by the PLIII is compatible with an unsaturated monogalacturonate. PLIII is a unique enzyme able to release unsaturated monogalacturonate as the only soluble product during the degradation of pectic substances; therefore, PLIII was classified as an exo-pectin lyase. To our knowledge, this is the first characterization of an exo-pectin lyase. The PLIII described in this work is potentially useful for ethanol production from pectin-rich biomass, besides other common applications for alkaline pectinases like preparation of textile fibers, coffee and tea fermentation, vegetable oil extraction, and the treatment of pulp in papermaking.

Nanocompósitos multifuncionas de fibroína reforçados com biocelulose

This work shows the preparation and characterization of the new nanocomposites based on fibroin and biocellulose. Bacterial cellulose (BC) is an exopolysaccharide produced by bacteria of the genus Gluconacetobacter, which it has identical chemical structure of the cellulose from plants and it has gained attention in the field of research for its unique properties as excellent mechanical properties when dry and hydrated , higher capacity of water retention, moldability , biodegradability and excellent biological affinity . Silk fibroin (SF) is a structural protein present in the cocoon of the silkworm, Bombyx mori, has been identified as suitable for developing optical devices, tissue engineering application, enzyme immobilization, controlled release drug agent biopolymer. Silk fibroin/bacterial cellulose nanocomposite films were prepared impregnating different cellulose charges (0.5 %, 1.0 %, 1.5 %, 2.5 %, 5.0 % and 10.0 %) weight/weight. According mechanical tests and water and Paynes's cup permeability showed that SF/BC 1% nanocomposite has the most relevant results. Poliethylenoglicol (PEG) containing SF films improved optical and mechanical properties when compared to pristine SF film. New SF/BC nanocomposites could be applied in Medicine, as biodegradable packaging and flexible substrates for OLEDs.

Obtenção e caracterização de nanofibras eletrofiadas via solução de quitosana com e sem inclusão de hidroxiapatita

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)