Determinação cromatográfica e degradação fotoeletrocatalítica do corante disperso Dispersol Black CVS

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Células solares de ZnO:Ga nanocristalino sensibilizado por corante

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Biossorção do corante DR 23 por Saccharomyces cerevisiae imobilizada em serragem de peroba (Aspidosperma polyneuron) tratada com PEI (polietilenoimina)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Sintese e aplicação de filmes biocomponentes nanoestruturados de 'TI'/'TI''O IND.2'/'W''O IND.3' por template e 'SI'/'TI''O IND.2'/'PT' por heterojunção em conversão de energia solar e remediação ambiental

Pós-graduação em Química - IQ

Degradação do corante comercial disperse red1 por processo foto-Feton e avaliação ecotoxicológica

Pós-graduação em Química - IQ

Produção de anticorpo monoclonal reativo com leveduras do gênero candida

The aim of this study was to obtain a reactive monoclonal antibody against Candida albicans. Spleen celIs of BALB/c mice previously immunized withCandida were fused in vitro with mielorna cells Sp2-0Ag14. The resultant hybridcells were kept in culture medium at 5% C02.The suspension growing cells were tested by ELISA to check the antibodies titer. The positive colonies were cloned to achieve the monoclonal antibody and further expanded in mice peritoneum. The antibody produced was purified and isotope. The monoclonal antibody was denominated 76C. The 76C was directed against mannoprotein molecules from Candida cell surface, which has not yet been completely investigated to find outlhe specific nature of epitope. The antibody 76C was analyzed by DOT BLOTagainst different Candida species and there were positives results in 87,5% of the tested samples_ The monoclonal antibody 76C will be a useful tool to investigate oligomannoside epitope from mannan and could be applied in sera diagnosis in invasive candidiasis and in studies of glicidic epitope.

Efeito da pressão em filmes finos de ZnO:Al por RF Magnetron sputtering reativo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Deposição e caracterização de filmes de óxido de cobalto por sputtering reativo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo das propriedades ópticas e vibracionais de filmes de GaN dopados com Mn elaborados por RF Magnetron Sputtering Reativo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de imunossensor impedimétrico para detecção do corante disperso Red 1

Pós-graduação em Química - IQ

Avaliação do PH e da densidade óptica do corante azul de metileno tamponado e não tamponado após o contato com diferentes cimentos endodônticos

O objetivo deste trabalho foi avaliar o pH e a densidade óptica das soluções de azul de metileno a 1% e 2% (tamponadas e não tamponadas) após a imersão de três cimentos endodônticos. Foram preparados oitenta espécimes de cada cimento endodôntico (Endofill, AH Plus e Sealapex), os quais foram imersos nas soluções corantes. As soluções foram analisadas antes e após a imersão dos materiais nos períodos de tempo de 0, 24, 48 e 72h. Foram realizadas avaliações do pH utilizando um pHmetro e da densidade óptica utilizando um espectofotômetro ajustado em 596nm. Os dados de pH foram analisados através de estatística descritiva e os dados da densidade óptica foram analisados pela ANOVA e teste de Tukey 5%. Pôde-se verificar que as soluções corantes de azul de metileno tamponadas e não tamponadas apresentaram pequena variação nos valores de pH e densidade óptica antes do contato com os cimentos endodônticos. As soluções corantes não tamponadas apresentaram valores de pH menores que as tamponadas, independentemente do contato com qualquer cimento endodôntico. Os cimentos endodônticos promoveram alterações nos valores de pH das soluções corantes, sendo que as maiores alterações ocorreram nas soluções não tamponadas. Ocorreram alterações nos valores da densidade óptica das soluções corantes tamponadas e não tamponadas nos diferentes períodos de tempo de análise, sendo diferentes para cada cimento endodôntico utilizado

Adsorção do corante luganil azul por espuma de poliuretano

The industrial development has created many environmental problems that can be observed through the changes in air, soil and water. The pollution of water bodies with compounds present in textile effluents cause beyond the visual pollution, changes in biological cycles, mainly by changing the process of photosynthesis. Due to these environmental implications it is necessary a treatment of livestock manure. The process of adsorption of the dye is a technique that has been successfully employed for effective removal of the color of the effluent. The purpose of this study was to investigate the application of a polyurethane foam plant of castor oil as an alternative adsorbent for removal of dyes in textile effluents. The study was conducted with the dye “luganil azul”, as adsorbent and the foam in a flexible manner and sprayed. It also investigated the influence of pH on the adsorption dye. The kinetic data were obtained, noting that the pH influence on adsorption. Adsorption isotherms of the dye in aqueous solution using the foam in a flexible manner also were determined experimentally.

Aplicações de um potencial reativo no estudo da interação entre moléculas e superfícies bidimensionais

In materials science, the search for technological improvements have become one of the main subject of study of researchers. This is especially true in the case of materials with reduced sizes, in the nanometer scale. Important phenomena to be studied in these cases are the desorption and adsorption on two-dimensional materials, such as graphene. These phenomena are of great importance in the study of interactions between organic films, synthesis or catalysis of reactions on surfaces and even in the creation of nanoscale devices [1, 2, 3, 4]. Between the most important topics related to these phenomena are the storage of gases in low-dimensional systems and the study of nanostructured fuel cells or batteries. In this context we used two different parametrizations for the reactive force field ReaxFF to study the potential barriers and reaction barriers of our system. First we made a study about the Reaction Barriers and Energy Barriers for bonds between graphene and the following atoms: sulfur, fluorine, hydrogen, nitrogen and oxygen. It is important to have this information in order to make it possible to understand how these atoms react with the graphene sheet. Subsequently, we calculate reaction barriers for mixed structures where fluorine is a fixed element bonded to graphene and other element is simultaneously bonded to graphene. This other element (N, O, H or S) is varied in its possible relative positions (ortho, meta and para in relation to fluorine in either: the same side and in the opposite side of the graphene membrane)

Estudo fotodinâmico da clorofila a, azul de metileno e rosa bengala como agente inseticida contra Aedes aegypti

Photodynamic therapy, term introduced by von Tapeiner in 1900, can be defined as the administration of a non toxic drug, i.e., a dye, known as photosensitizer (FS), which subsequently will be illuminated with light of specific wavelength. PDT is based on the interaction among FS, oxygen and light, which through photochemical reactions cause cell death. The FS molecules must have a high probability to form the singlet state after the excitation, which can induce chemical changes in the neighborhood in two ways, called reactions type I and type II. The type II reaction is based on the exchange of energy to molecular oxygen, exciting it to its state of higher energy (singlet), which is highly reactive. The proposed mechanisms for cell death are linked to damage to the DNA, mitochondria and to the cytoplasmic membrane. Several pre‐clinical and clinical trials have been carried out and the PDT is already used in many countries for treatment mainly against certain types of cancer. The therapy also has been gaining strength in antimicrobial control, since the microorganisms have appeared increasingly resistant to current antibiotics. Another attempt to use the PDT is for the inactivation of macro‐organisms, such as micro‐crustaceans and mosquitoes. To this end I tested whether the photosensitizers methylene blue, rose Bengal and the chlorophyll a has insecticidal activity against the yellow fever and dengue vector mosquito, Aedes aegypti. Since these diseases have no effective treatments, its control is linked to the vector control, which has shown resistance to chemical pesticides used. Based on this, this work shows its importance, because it is a new type of mosquito control since all the photosensitizers used are low cost, do not generate toxic products at the concentrations used and showed good results in mortality. The best photosensitizer was rose Bengal... (Complete abstract click electronic access below)

Biorremoção do corante acid blue 29, usando serragem (Pinus sp.) como biossorvente

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)