26 research outputs found
Evidence of cAMP involvement in cellobiohydrolase expression and secretion by Trichoderma reesei in presence of the inducer sophorose
Full text link(In)segurança alimentar entre famĂlias com crianças menores de cinco anos residentes em ĂĄrea de vulnerabilidade social de Campina Grande, ParaĂba
Full text linkFood insecurity and socioeconomic, food and nutrition profile of schoolchildren living in urban and rural areas of Picos, PiauĂ
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Inclusion complexes of pyrimethamine in 2-hydroxypropyl-beta-cyclodextrin: Characterization, phase solubility and molecular modelling
No full textThe inclusion complexation of pyrimethamine in 2-hydroxypropyl-beta-cyclodextrin has been investigated by 2D H-1 NMR, FTIR and UV/visible spectroscopy and also by molecular modelling methods (AM1, PM3, MM3). From the phase-solubility diagram a linear increase was observed in pyrimethamine aqueous solubility in the presence of 2-hydroxypropyl-beta-cyclodextrin, evidencing the formation of a soluble inclusion complex. According to the continuous variation method (Job's plot) applied to fluorescence measurements, a 1:1 stoichiometry has been proposed for the complex. Concerning the structure of the complex, a Cl-in orientation of pyrimethamine in the 2-hydroxypropyl-o-cyclodextrin cavity has been proposed from the theoretical calculations, being confirmed by two-dimensional H-1 NMR spectroscopy (ROESY). The thermal behaviour has also been studied, providing complementary evidences of complex formation. (c) 2007 Elsevier Ltd. All rights reserved.15175752575
The Interplay between Environmental Filtering and Spatial Processes in Structuring Communities: The Case of Neotropical Snake Communities
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Avaliação da ResistĂȘncia Interlaminar do CompĂłsito PEI/Fibras de Carbono Soldado pelo MĂ©todo de ResistĂȘncia ElĂ©trica
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