Análise da incorporação de nanopartículas de prata a uma resina acrílica para base protética

Pós-graduação em Odontologia - FOA

Estudos químicos e anatômicos de cascas de clones de Eucalyptus

The barks generated from the wood processing industries are wastes generated in significant quantities, becoming interesting to have basic studies of their anatomical and chemical properties in order to make better use of this material. This study aimed to carry out anatomical studies, chemical and tannins from the barks of commercial clones of Eucalyptus. For this, permanent histological slides for anatomical characterization and percentage of cellular elements were prepared; and cellular elements were dissociated for biometry of the elements. The analyses were related to chemical extractives, ash, lignin, suberin, sugars, phenols, tannins, flavonoids and antioxidant activity of the extracts. The tannins were extracted in pure water and with water mixed with sodium sulfite, and were subsequently evaluated the properties by FT-IR. It was verified by the anatomical characterization and chemical quantification, the similarity between the clones. Regarding the biometrics of cellular elements, statistically significant differences were not observed for the following parameters: length and diameter of sieve tube, axial parenchyma diameter, and rays hight. The yield of condensed tannins and Stiasny index for studied clones are low, showing the infeasibility of using bark for the extraction of tannins to produce adhesives, however tannins and other bioactive phenolic compounds can be used in the pharmaceutical and cosmetics sectors due to its antioxidant potential. The spectrum of tannins is the same as the one found the literature. Due to the high yield of verified sugar, (around 46,68%) sugars are potencial products, with a high yield of glucose , it is interesting for application in biorefinery.

Síntese, caracterização e estudo termoanalítico dos succinatos de alguns metais de transição bivalentes no estado sólido

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de uma matriz híbrida orgânica-inorgânica na dinâmica de liberação controlada de fármacos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência dos diferentes cátions metálicos (Cu 2+ , Ni 2+ , Pb 2+ , Cd 2+ ) na formação do hidrogel bentonita – poli (vinil álcool)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Metodologias para a avaliação do potencial fisiológico de sementes de tabaco

Despite tobacco being a culture propagated by seeds, there is little information concerning tests that allow the distinction of similar germination lots in different levels of vigor. The diversity of cultivars available in the market, and a few peculiarities of the species, such as uneven maturation of the flowers, fruits and seeds, small size and seed dormancy, are considered obstacles for obtaining lots of tobacco of high physiological potential. Thus, this research was developed with the objective of adapting feasibility and vigor tests for evaluating the physiological potential of tobacco seed lots. We used nine lots of tobacco seeds of cultivar CSC 447 and nine lots of seeds of cultivar BAT 2101, belonging to variety groups Virginia and Burley, respectively. Initially, germination test was conducted to characterize the profile of the lots. For determining the feasibility and vigor of the tobacco seeds, germination tests were conducted in distinct temperatures, controlled emergence conditions, electric conductivity, artificial aging and in tetrazolium. For determining the isoenzymatic marker for seed quality, analyses were conducted with enzymes catalase, esterase, malate dehydrogenase and alcohol dehydrogenase. In conclusion, the emergence tests at 25oC and artificial aging at 41oC for 72 hours, are efficient in discriminating the lots of tobacco seeds in different levels of vigor. The electric conductivity and germination tests in different temperatures have distinct responses in relation to the genotype of the tobacco seeds. The tetrazolium test using the methodology with pre-conditioning in 3.5% sodium hypochlorite solution and subsequent emersion in 1.0% tetrazolium solution for 18 hours is efficient for the quick evaluation of the feasibility of tobacco seeds. The analysis of the profiles of enzymes catalase, esterase, malate dehydrogenase and alcohol dehydrogenase is efficient as markers for tobacco seed quality.

Síntese, caracterização e atividade antifúngica de derivados anfifílicos de dietilaminoetil-quitosana contra Aspergillus flavus e Aspergillus parasiticus

Pós-graduação em Química - IBILCE

Desenvolvimento e aperfeiçoamento de protocolos de conjugação de nanomarcadores luminescentes com sistemas biológicos para aplicação em imunoensaios

Pós-graduação em Química - IBILCE

Substâncias húmicas aquáticas: caracterização e interação com íons crômio e proposta de um indicador de matéria orgânica lábil

Pós-graduação em Química - IBILCE

Determinação de conservantes e contaminantes em alimentos e bebidas por Eletroforese capilar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ocorrência de aminas aromáticas como subprodutos da degradação dos corantes sudan III e disperso amarelo 9

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Síntese, caracterização e estudo termoanalítico dos mandelatos de alguns metais de transição bivalentes no estado sólido

Pós-graduação em Química - IQ

Desenvolvimento de eletrodos modificados para determinação de cálcio e magnésio em biodiesel

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de sistemas de screening automatizados para determinação de sulfonamidas em mel e procedimento limpo para a quantificação de sulfaquinoxalina em medicamentos veterinários

Pós-graduação em Química - IQ

Desenvolvimento de métodos analíticos limpos para determinações forenses: chumbo em resíduos de disparo e furosemida em doping

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)