Bulcao R.,Federal University of Rio Grande do Sul |
Garcia S.C.,Federal University of Rio Grande do Sul |
Limberger R.P.,Federal University of Rio Grande do Sul |
Baierle M.,Federal University of Rio Grande do Sul |
And 3 more authors.
Quimica Nova | Year: 2012
In the recent years, analytical toxicologists have been facing difficulties in detecting designer drugs due to the chemical modifications on the existing structures and the speed in which they are released into the market, requiring the development and improvement of specific and appropriate analytical methods. This work is a review of the literature which summarizes the characteristics of the drugs and the analytical validated methods using conventional and unconventional matrices currently used for correct identification and quantification of the following classes of emerging drugs of abuse: derivatives of opiates, amphetamines, tryptamines, piperazines and cannabinoids.
Raymundi V.C.,Faculdades Oswaldo Cruz |
Aguiar L.G.,University of Sao Paulo |
Souza E.F.,University of Sao Paulo |
Sato A.C.,CNR Institute of Biophysics |
Giudici R.,University of Sao Paulo
Heat and Mass Transfer/Waerme- und Stoffuebertragung | Year: 2015
Hydrogels of poly(acrylic acid) crosslinkedwith trimethylolpropane triacrylate (TMPTA) were produced through solution polymerization. After these hydrogels were loaded with insulin solution, they evidenced swelling. Experiments of controlled release of insulin through the hydrogels were performed in acidic and basic media in order to evaluate the rates of release of this protein provided by the referred copolymer. Additionally, a mathematical description of the system based on differential mass balance was made and simulated in MATLAB. The model consists of a system of differential equations which was solved numerically. As expected, the values of swelling index at the equilibrium and the rates of insulin release were inversely proportional to the degree of crosslinking. The mathematical model provided reliable predictions of release profiles with fitted values of diffusivity of insulin through the hydrogels in the range of 6.0 × 10−7–1.3 × 10−6 cm2/s. The fitted and experimental values of partition coefficients of insulin between the hydrogel and the medium were lower for basic media, pointing out good affinity of insulin for these media in comparison to the acidic solutions. © 2015 Springer-Verlag Berlin Heidelberg
Araujo Reis-Menezes A.,University of Sao Paulo |
Gambale W.,University of Sao Paulo |
Cintra Giudice M.,Faculdades Oswaldo Cruz
Indoor and Built Environment | Year: 2011
Libraries are very propitious environments for the growth of fungi. The great concentration of organic material available for these microorganisms, and often with the lack of adequate ventilation or climate control, would favour this situation. This study was conducted in 2003 to determine the predominant genera of fungi in public libraries by a survey of fungi contaminating the upper surface of books, with and without air conditioning in the city of São Paulo, Brazil, in the winter and summer, during the respective periods with high and low levels of airborne fungi in that city. Six libraries were chosen, located on the campus of the University of São Paulo, three of them with air conditioning and the other three with natural ventilation. In these six libraries, 31 genera of fungi were identified in total. The genera and frequency of contaminant fungi recovered differed significantly between the libraries with and without air conditioning and in the samples collected in the summer as opposed to the winter. Cladosporium was the most frequent in the libraries with and without air conditioning, and in the winter. Aspergillus was isolated more often in the summer. © The Author(s), 2011.
Montagna E.E.,University of Sao Paulo |
Moreno J.A.R.,Faculdades Oswaldo Cruz |
Verde M.J.C.,Faculdades Oswaldo Cruz |
Maifrino L.B.M.,Faculdades Oswaldo Cruz |
Maifrino L.B.M.,São Judas Tadeu University
Journal of Morphological Sciences | Year: 2011
Many educational policies have been launched aiming at the adoption of interdisciplinary activities by higher education institutions. Despite those initiatives and in front of the exposed, the main difficulty for teachers to change their teaching style is still the lack of alternative strategies feasible to their specific courses and local conditions. A plausible strategy is to adopt tasks and class jobs with topics that forcefully covers multidisciplinary aspects and, therefore, may lead to an encompassing view of knowledge. This article describes an interdisciplinary approach to the integration of issues from previously separate disciplines into an Anatomy, First-Aid and Science Methodology courses in a poster session presented by the students and assessed by both students and professors. Those contents must deal with interesting issues in health sciences and compatible with the knowledge that students already have. Both students' and teachers assessed the posters by two different Likert-type questionnaires about content and form. The results show students' engagement on the activities and reveal enthusiasm on uncommon group activities out of the regular no participative classroom tasks.
Vampre T.M.,Instituto Biologico |
Fuccillo R.,Faculdades Oswaldo Cruz |
de Andrea M.M.,Brazilian National Council for Scientific and Technological Development
Revista Brasileira de Ciencia do Solo | Year: 2010
HCB (hexachlorobenzene) is an environmentally ubiquitous organochlorine compound and is classified as one of the persistent organic pollutants (POP). It is highly toxic and has been found in the region "Baixada Santista" of the state of São Paulo (Brazil) for a number of years. To evaluate the potential of the earthworm species Eisenia andrei as bioindicator of HCB-contamination, earthworm specimens were maintained for 14 days in soil containing 14C-HCB, and their bioaccumulation was analyzed. No mortality was detected after neither 7 nor 14 days of contact with the treated soil, indicating that the dose was sub-lethal and would enable a biondication study. Soil and animal tissue samples were submitted to solvent extraction 14 days after the beginning of the study to determine radiocarbon, HCB and lipid contents in the organisms. Most of the radiocarbon from the applied 14C-HCB remained in the soil in the form of extractable residue and only small amounts were found in the animal tissues as extractable and bound residues. The gas chromatography of the extracts detected only HCB and consequently, no degradation occurred, neither in the soil, nor in animal tissues. The lipid content of the earthworm tissues was negatively correlated with HCB amounts (-0.2), indicating that HCB may have inhibited lipid formation. Finally, the bioaccumulation factor (BAF) of 6.5 indicated that HCB is actually bioaccumulated by the worms which indicates that this animal may be used as bioindicator in HCB-contamination studies.
Anatomical dimensions of the wood of Tectona grandis Linn. in relation to spacing and radial position in the trunk [Dimensões anatômicas da madeira de Tectona grandis Linn. em função do espaçamento e da posição radial do tronco]
De Lima I.L.,Instituto Florestal Do Estado Of Sao Paulo |
Garcia R.,Faculdades Oswaldo Cruz |
Longui E.L.,Instituto Florestal Do Estado Of Sao Paulo |
Florsheim S.M.B.,Instituto Florestal Do Estado Of Sao Paulo
Scientia Forestalis/Forest Sciences | Year: 2011
For the better use of Tectona grandis wood it is necessary to study the relationship between the anatomy and wood quality with the factors that may affect growth conditions. Spacing is one of growth factors to be considered for production and a better quality of teak wood. The aim of the present work was to verify the influence of spacing on the cellular dimensions of the wood of a 31-year old Tectona grandis tree; and its radial variability. In this study, we used the e×perimental delineation of randomized blocks with three treatments (3 × 1.5; 3 × 2 and 3 × 2.5m) and five replications, and where 15 trees with average diameter were chosen in the region of Pederneiras/SP. From each tree a disc of 7cm thickness at DBH (diameter at breast height) was removed and from each disc samples were taken in different distances in pith-to-bark radial direction (pith, intermediate and bark). It was concluded that the fiber length, fiber wall thickness and frequency vessel were influenced by spacing of planting. A good positive relationship was found between fiber length and fiber wall thickness with radial position and a negative relation between vessel diameter and ray frequency with the radial position.
Didio R.J.,Faculdades Oswaldo Cruz |
Barroso A.C.O.,Brazilian Nuclear Energy Research Institute (IPEN)
International Journal of Nuclear Energy Science and Technology | Year: 2011
This paper describes the development of a new methodology to support strategic planning. It makes use of Technological Roadmapping (TRM) associated with a simplified technique for detecting emerging research fronts by drilling into databases of scientific publications and patents. The customisation of the TRM process to a radio pharmacy unit and its association with an Emerging Research Fronts Detection (ERFD) technique renders a more robust tool for strategic planning for this kind of business, since it combines an insideout natured process (TRM) with ERFD that is outside-in. The former is very good to capture market and customers' expectation trends and the latter is superior to gather insights for technology and product trends. The business unit DIRF (Diretoria de Radiofarmácia) of IPEN-CNEN/SP, located in São Paulo, Brazil, was used as the base of the study and implementation of the methodology presented in this work. Copyright © 2011 Inderscience Enterprises Ltd.
Ferreto H.F.R.,Brazilian Nuclear Energy Research Institute (IPEN) |
Oliveira A.C.F.,Brazilian Nuclear Energy Research Institute (IPEN) |
Gaia R.,Faculdades Oswaldo Cruz |
Parra D.F.,Brazilian Nuclear Energy Research Institute (IPEN) |
Lugao A.B.,Brazilian Nuclear Energy Research Institute (IPEN)
AIP Conference Proceedings | Year: 2014
The aim of this paper is to investigate structural changes of high density polyethylene (HDPE) modified by ionizing radiation (gamma rays) in different atmospheres. The gamma radiation process for modification of commercial polymers is a widely applied technique to promote new physical-chemical and mechanical properties. Gamma irradiation originates free radicals which can induce chain scission or recombination, providing its annihilation, branching or crosslinking. This polymer was irradiated with gamma source of 60Co at doses of 5, 10, 20, 50 or 100 kGy at a dose rate of 5 kGy/h. The changes in molecular structure of HDPE, after gamma irradiations were evaluated using thermogravimetric analysis (TGA) and tensile machine and oscillatory rheology. The results showed the variations of the properties depending on the dose at each atmosphere. © 2014 American Institute of Physics.