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Multidisciplinary Center for Development of Ceramic Materials

Grant number: 98/14324-0
Support Opportunities:Research Grants - Research, Innovation and Dissemination Centers - RIDC
Duration: October 01, 2000 - April 30, 2013
Field of knowledge:Interdisciplinary Subjects
Principal Investigator:Elson Longo da Silva
Grantee:Elson Longo da Silva
Host Institution: Centro Multidisciplinar de Desenvolvimento de Materiais Cerâmicos (CMDMC). Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Pesquisadores principais:
Antônio Carlos Hernandes ; Carlos de Oliveira Paiva Santos ; Edson Roberto Leite ; Ernesto Chaves Pereira de Souza ; José Arana Varela ; Luis Otavio de Sousa Bulhões ; Reginaldo Muccillo ; Wilson Aires Ortiz
Associated grant(s):12/51195-3 - Modeling effects of sensor response of semiconducting oxide with functionalized nanoparticles, AP.R
12/06057-1 - Electroceramics XIII, AR.EXT
12/06393-1 - E-MRS 2012 Spring Meeting, AR.EXT
+ associated grants 11/00922-0 - Preparation of oriented ceramics by synthesis in electric and magnetic field starting from nanostructured precursors, AV.EXT
11/00886-3 - Preparation of oriented ceramics by synthesis in electric and magnetic field starting from nanostructured precursors, AV.EXT
06/51897-7 - Sergei Alexandrovich Sergeenkov | Joint Institute for Nuclear Research - Rússia, AV.EXT
03/00296-5 - Sergei Alexeiev Sergeenkov | Joint Institute for Nuclear Research - Russia, AV.EXT
02/04690-7 - Victor Vitalievich Tugushev | Russian Research Centre Kurchatov Institute - Rússia, AV.EXT
02/07122-0 - Fractal dimension of the grain boudary region in doped sno2 ceramics., AR.EXT - associated grants
Associated scholarship(s):12/18597-0 - Investigation of photoluminescent, photocatalytic and bactericide properties of (Ca1-xZnx)WO4 and (Ca1-xAg2x)WO4, BP.PD
11/19561-7 - Development of ZnO Films and Nanostructures for Application in Sensors and Nanogenerator., BP.DR
10/20481-5 - Synthesis and characterization of heterostructures from vanadates obtained by the oxidant peroxo method, BP.PD
+ associated scholarships 09/17752-0 - Energy conversion through nano and mesocrystals of BaZrxHf1-xO3: A theoretical and experimental approach., BP.PD
09/50303-4 - Optical and photocatalytic properties of ZnMoO4 and ZnWO4, BP.PD
09/05623-0 - Molecular Dynamic Simulation of Cerium Oxide (CeO2)Nanocrystal Colloidal Suspension, BP.PD
08/10677-0 - Study of role of K+ ions in the configuratinal changes (changeover) of hexacyanoferrates molecular materials., BP.DR - associated scholarships


The Multidisciplinary Center for Development of Ceramic Materials (MCDCM) is being constructed by researchers of five different institutions: Universidade Federal de Sao Carlos (UFSCar), Universidade Estadual Paulista (UNESP/Araraquara), Universidade de Sao Paulo (USP/Sao Carlos), Centro Brasileiro de Pesquisas Físicas (CBPF/CNPq) and Instituto de Pesquisas Energéticas e Nucleares (IPEN/Sao Paulo). The first three are public universities (UFSCar. UNESP and USP) while the other two are R&D bodies of the federal government (IPEN and CBPF). A strong and fruitful collaboration among these groups is being developed along the years. a long term process leading to this project of multidisciplinary characteristics. In fact the groups participating of this project have been formally assigned, in 1997 a Group of Excellence Grant by the Ministry of Science and Technology under the PRONEX/FINEP program. This Group of Excellence with headquarters at the Interdisciplinary Laboratory of Electrochemistry and Ceramics (LIEC/UFSCar) integrating researchers of complementary background and acting in multiple areas on a cooperative basis. is now proposing the nucleation of MCDCM, to be considered for funding by FAPESP. The LIEC group is studying processes for the synthesis of new materials in a multidisciplinary way. Tackling this subject under different approaches such as correlation between syntheses morphology and properties; microstructure control and the corresponding control of properties of materials exhibiting complex structures; development of preparation methodology to achieve new properties in ceramic materials; preparation and optimization of the relevant properties of materials presenting electric, ferroelectric, refractory, electrocatalytical and superconducting properties. The LIEC team is composed by chemists, physicists and materials scientists working in a network of laboratories, mainly in Sao Carlos and Araraquara. These laboratories are operated and maintained by the Electrochemistry Group and the Ceramics Group (Chemistry Department. UFSCar) the Superconductivity and Magnetism Group (Physics Department UFSCar) the Crystal Growth Group (Physics Institute USP) and the Interdisciplinary Laboratory of Ceramics (Chemistry Institute UNESP). The installed facilities include around US$ 5.000.000 in laboratory equipment for synthesis, processing, characterization and experimental studies including: Quantum Design SQUID Magnetometer, several Experimental Stations for magnetometry and transport measurements at low temperatures and high magnetic fields, 200 kV Analytical Transmission Microscope, 3 Scanning Electron Microscopes with analytical capabilities. X-ray diffractometer, X-ray fluorescence, Thermal Analysis Systems including Dilatometry, TG and DTA. Automatic Crystal Growth System, Laser Heater Pedestal Growth System, Czochralski and Bridgman Equipment, Cutting and Precision Polishing Machine, Hot Press and several High Temperature Furnaces. The integrated areas of these laboratories perform about 2.500 m2 including 2 class 100 clean rooms. Through the development of several projects the LIEC group has accumulated knowledge to master many fundamental aspects that are vital for construction of devices using ceramic materials. As a result from those projects it was possible to develop devices using semiconducting electrochromic optical and electrooptical properties many of which have caused a significant impact. Interaction with industries along these years has led to the manufacture of commercial products of highly aggregated value, that are being commercialized. From the academic point of view new materials with controlled properties were developed.and it was possible to understand some of the distinct aspects that have led to such properties. The scientists participating in this project have published more than 500 scientific papers. Another remarkable characteristic of the group is the ability to form and advise new professionals mainly PhDs and MScs who are presently working in several activities in and outside university. Integrated number shows that we have supervised 14 post-docs, 42 PhD and 64 MSc students, plus 148 undergraduate student projects. There are now 6 post-docs, 32 PhD•s, 21 MSc's and 54 undergraduate students currently working under supervision of the LIEC team Research results were transferred to companies leading to patents and commercial products which represent one way of interaction between LIEC and the community. Since 1983 LIEC has being developing R&D works with the steel companies of the country and industries in the ceramic sector (USIMINAS, CSN, Ceramica SAFFRAN and IBAR). In this period five MSc's and one PhD thesis were produced. LIEC is presently developing research in steel facilities with CSN and IBAR. It is also working in glass furnaces operating at 100% oxygen with White Martins. This last process diminishes environmental pollution by elimination of particulates and emission of toxic gases such as NOx and as SOx besides increasing productivity of glass manufacturing with the same energy consumption. It is thus a new technology for the strengthening of the glass industry in the country having as consequences an improvement of the final product and a decrease on environmental pollution. A series of recycling projects were jointly developed with CSN allowing the usage of internally recycled materials in the plant such as foundry sands slags from Blast Furnace and Steel Plant precipitated graphite from torpedo car pouring as well as the usage of alumina ash reject of the aluminum production process in CSN's dessulfurizing station. The industrial side of the projects will be performed jointly by the Center and the engineers of White Martins SA. IBAR and CSN in industrial units that produce glasses lining ceramics and steel LIEC has also participated on initiatives concerning the improvement of high-school teaching level promoting lectures and courses in Sao Carlos and other cities of Brazil training in refractory materials for industry technicians and participating of the creation of an Educational Cooperative - a school with activity in science in all levels. The above mentioned activities and the experience gained acting as a collaborative team have thus encouraged the LIEC group to propose the creation of a Multidisciplinary Center for Development of Ceramic Materials, an institution to formally aggregate all topics recommended by FAPESP for a prospective Center: to host and irradiate fundamental research, to provide an adequate environment to stimulate partnerships for innovative solutions and to disseminate scientific knowledge beyond university frontiers. A feature of the Center. perhaps as important as the issues it will be focusing on is the fact that this proposal is a natural sequence of what has been carried out on a regular basis, by the LIEC group. In this way the basic proposal of this study is to develop advanced ceramic materials, thin films, refractory and ceramic tiles. The basic needs of the electronic and optical-electronic industries are related to the processing of special materials compacts and with larger capability to storage and transport information for practical applications, including portable computers and sophisticated mobile telecommunications. In the same way, miniaturization of electronic circuits has been always considered for integration of ceramic devices to the electronics. One important goal in the glass and steel making industries is to use refractory inert to the corrosive environment in which these materials are produced. The research will be focused on synthesis of new ceramic phases, on processing of new ceramic and thin film materials, on control of the microstructure of these materials aiming to obtain controlled and reproducible properties. Theoretical modeling will be considered aiming the optimization of the specific properties. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
Brillo reparador 
The memory of the future 
La memoria del futuro 
Remedial shine 
Competitive ceramics 
Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
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Scientific publications (42)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GONCALVES, RICARDO H.; SCHREINER, WIDO HERWIG; LEITE, EDSON R.. Synthesis of TiO2 Nanocrystals with a High Affinity for Amine Organic Compounds. Langmuir, v. 26, n. 14, p. 11657-11662, . (98/14324-0)
DE MENDONCA, VAGNER R.; DALMASCHIO, CLEOCIR J.; LEITE, EDSON R.; NIEDERBERGER, MARKUS; RIBEIRO, CAUE. Heterostructure formation from hydrothermal annealing of preformed nanocrystals. JOURNAL OF MATERIALS CHEMISTRY A, v. 3, n. 5, p. 2216-2225, . (98/14324-0)
BERENGUE, O. M.; AMORIM, C. A.; KAMIMURA, H.; CHIQUITO, A. J.; LEITE, E. R.. Oxygen-induced metal-insulator-transition on single crystalline metal oxide wires. Journal of Applied Physics, v. 111, n. 1, . (98/14324-0)
KOMATSU, DANIEL; PARANHOS, CAIO MARCIO; RUVOLO-FILHO, ADHEMAR. Mechanical and Thermal Properties of Linear Low Density Polyethylene/Organoclay Nanocomposites. MATERIALS FOCUS, v. 5, n. 3, p. 209-215, . (08/57872-1, 98/14324-0)
RIOS, EMERSON C.; ZIMER, ALEXSANDRO M.; MENDES, PAULO C. D.; FREITAS, MARCOS B. J.; DE CASTRO, EUSTAQUIO V. R.; MASCARO, LUCIA H.; PEREIRA, ERNESTO C.. Corrosion of AISI 1020 steel in crude oil studied by the electrochemical noise measurements. FUEL, v. 150, p. 325-333, . (13/26233-1, 98/14324-0, 11/19430-0)
MOREIRA, MARIO L.; LONGO, VALERIA M.; AVANSI, JR., WALDIR; FERRER, MATEUS M.; ANDRES, JUAN; MASTELARO, VALMOR R.; VARELA, JOSE A.; LONGO, ELSON. Quantum Mechanics Insight into the Microwave Nucleation of SrTiO3 Nanospheres. Journal of Physical Chemistry C, v. 116, n. 46, p. 24792-24808, . (98/14324-0, 09/17752-0)
MOREIRA, MARIO L.; ANDRES, JUAN; GRACIA, LOURDES; BELTRAN, ARMANDO; MONTORO, LUCIANO A.; VARELA, JOSE A.; LONGO, ELSON. Quantum mechanical modeling of excited electronic states and their relationship to cathodoluminescence of BaZrO3. Journal of Applied Physics, v. 114, n. 4, . (98/14324-0)
CONTI, TIAGO G.; CHIQUITO, ADENILSON J.; DA SILVA, RAFAEL O.; LONGO, ELSON; LEITE, EDSON R.. Electrical Properties of Highly Conducting SnO2:Sb Nanocrystals Synthesized using a Nonaqueous Sol-Gel Method. Journal of the American Ceramic Society, v. 93, n. 11, p. 3862-3866, . (98/14324-0)
FONSECA‚ FC; GOYA‚ GF; JARDIM‚ RF; MUCCILLO‚ R.; CARRENO‚ NLV; LONGO‚ E.; LEITE‚ ER. Superparamagnetism and magnetic properties of Ni nanoparticles embedded in SiO_ {2}. Physical Review B, v. 66, n. 10, p. 104406, . (99/10798-0, 98/14324-0)
COSTA, G. C. C.; MUCCILLO, R.. High-temperature electrical properties of lanthanum beta-alumina solid electrolytes. CERAMICS INTERNATIONAL, v. 35, n. 1, p. 467-470, . (98/14324-0, 05/53241-9)
VOLANTI, DIOGO P.; ROSA, IEDA L. V.; PARIS, ELAINE C.; PASKOCIMAS, CARLOS A.; PIZANI, PAULO S.; VARELA, JOSE A.; LONGO, ELSON. The role of the Eu3+ ions in structure and photoluminescence properties of SrBi2Nb2O9 powders. Optical Materials, v. 31, n. 6, p. 995-999, . (98/14324-0)
DA SILVA, RAFAEL O.; CONTI, TIAGO G.; DE MOURA, ANDRE F.; STROPPA, DANIEL G.; FREITAS, LUIZ C. G.; RIBEIRO, CAUE; CAMARGO, EMERSON R.; LONGO, ELSON; LEITE, EDSON R.. Antimony-Doped Tin Oxide Nanocrystals: Synthesis and Solubility Behavior in Organic Solvents. ChemPhysChem, v. 10, n. 5, p. 841-846, . (98/14324-0)
COSTA‚ GCC; MUCCILLO‚ R.. Synthesis of scandia-stabilized zirconia nanoparticles by the polyacrylamide technique. Solid State Ionics, v. 179, n. 21, p. 1219-1222, . (98/14324-0)
FONSECA‚ FC; MUCCILLO‚ R.. Impedance spectroscopy analysis of percolation in (yttria-stabilized zirconia)-yttria ceramic composites. Solid State Ionics, v. 166, n. 1, p. 157-165, . (98/14324-0)
DALMASCHIO, CLEOCIR JOSE; DA SILVEIRA FIRMIANO, EDNEY GERALDO; PINHEIRO, ANTONIO NARCISIO; GUEDES SOBRINHO, DIEGO; DE MOURA, ANDRE FARIAS; LEITE, EDSON ROBERTO. Nanocrystals self-assembled in superlattices directed by the solvent-organic capping interaction. NANOSCALE, v. 5, n. 12, p. 5602-5610, . (98/14324-0)
MAZZO, TATIANA MARTELLI; PINATTI, IVO MATEUS; MACARIO, LEILANE ROBERTA; AVANSI JUNIOR, WALDIR; MOREIRA, MARIO LUCIO; VIANA ROSA, IEDA LUCIA; MASTELARO, VALMOR ROBERTO; VARELA, JOSE ARANA; LONGO, ELSON. Europium-doped calcium titanate: Optical and structural evaluations. Journal of Alloys and Compounds, v. 585, p. 154-162, . (98/14324-0)
SEQUINEL, T.; GARCIA, I. G.; TEBCHERANI, S. M.; KUBASKI, E. T.; OLIVEIRA, L. H.; SIU LI, M.; LONGO, E.; VARELA, J. A.. Red shift and higher photoluminescence emission of CCTO thin films undergoing pressure treatment. Journal of Alloys and Compounds, v. 583, p. 488-491, . (98/14324-0, 09/11099-2)
MILANEZ, JULIANA; DE FIGUEIREDO, ALBERTHMEIRY T.; DE LAZARO, SERGIO; LONGO, VALERIA M.; ERLO, RAFAEL; MASTELARO, VALMOR R.; FRANCO, ROBERTO W. A.; LONGO, ELSON; VARELA, JOSE A.. The role of oxygen vacancy in the photoluminescence property at room temperature of the CaTiO3. Journal of Applied Physics, v. 106, n. 4, . (98/14324-0)
BRANKOVI, GORAN; BRANKOVI, ZORICA; VARELA, JOSÉ ARANA; LONGO, ELSON. Strontium titanate films prepared by spray pyrolysis. Journal of the European Ceramic Society, v. 24, n. 6, p. 989-991, . (98/14324-0)
FLORIO, DANIEL ZANETTI DE; MUCCILLO, R.. Effect of boron oxide on the cubic-to-monoclinic phase transition in yttria-stabilized zirconia. Materials Research Bulletin, v. 39, n. 10, p. 1539-1548, . (99/10798-0, 98/14324-0)
DA COSTA, G. C. C.; MUCCILLO, R.; SALGADO, L; FILHO, FA. Synthesis of lanthanum beta alumina by the polymeric precursor technique. Materials Science Forum, v. 530-531, p. 2-pg., . (98/14324-0, 99/10798-0)
COSENTINO, I. C.; VICHI, F. M.; MUCCILLO, E. N. S.; MUCCILLO, R.; SALGADO, L; FILHO, FA. Synthesis and characterization of nanosized ZrTiO4 powders prepared by the sol-gel method. Materials Science Forum, v. 530-531, p. 2-pg., . (98/14324-0, 99/10798-0)
CAPRONI, E.; MUCCILLO, R.; SALGADO, L; FILHO, FA. Preparation and characterization of zirconia-yttria/zirconia-magnesia composites. Materials Science Forum, v. 530-531, p. 2-pg., . (98/14324-0, 99/10798-0)
BERGER, D.; DE MOURA, A. P.; OLIVEIRA, L. H.; BASTOS, W. B.; LA PORTA, F. A.; ROSA, I. L. V.; LI, M. S.; TEBCHERANI, S. M.; LONGO, E.; VARELA, J. A.. Improved photoluminescence emission and gas sensor properties of ZnO thin films. CERAMICS INTERNATIONAL, v. 42, n. 12, p. 13555-13561, . (98/14324-0, 09/11099-2)
GONCALVES, RICARDO H.; LEITE, LUCAS D. T.; LEITE, EDSON R.. Colloidal WO3 Nanowires as a Versatile Route to Prepare a Photoanode for Solar Water Splitting. CHEMSUSCHEM, v. 5, n. 12, p. 2341-2347, . (98/14324-0)
MUCCILLO, R.; MUCCILLO, E. N. S.. An experimental setup for shrinkage evaluation during electric field-assisted flash sintering: Application to yttria-stabilized zirconia. Journal of the European Ceramic Society, v. 33, n. 3, p. 515-520, . (05/53241-9, 98/14324-0)
CAMARGO, EMERSON R.; BARRADO, CRISTIANO M.; RIBEIRO, CAUE; LONGO, ELSON; LEITE, EDSON R.. Nanosized lead lanthanum titanate (PLT) ceramic powders synthesized by the oxidant peroxo method. Journal of Alloys and Compounds, v. 475, n. 1-2, p. 817-821, . (98/14324-0)
GONCALVES, RICARDO H.; LIMA, BRUNO H. R.; LEITE, EDSON R.. Magnetite Colloidal Nanocrystals: A Facile Pathway To Prepare Mesoporous Hematite Thin Films for Photoelectrochemical Water Splitting. Journal of the American Chemical Society, v. 133, n. 15, p. 6012-6019, . (98/14324-0)
SOUZA, FLAVIO LEANDRO; LOPES, KIRIAN PIMENTA; LONGO, ELSON; LEITE, EDSON ROBERTO. The influence of the film thickness of nanostructured alpha-Fe2O3 on water photooxidation. Physical Chemistry Chemical Physics, v. 11, n. 8, p. 1215-1219, . (98/14324-0)
DA SILVA, RAFAEL O.; GONCALVES, RICARDO H.; STROPPA, DANIEL G.; RAMIREZ, ANTONIO J.; LEITE, EDSON R.. Synthesis of recrystallized anatase TiO2 mesocrystals with Wulff shape assisted by oriented attachment. NANOSCALE, v. 3, n. 4, p. 1910-1916, . (98/14324-0)
GONCALVES, RICARDO H.; LEITE, EDSON R.. Nanostructural characterization of mesoporous hematite thin film photoanode used for water splitting. Journal of Materials Research, v. 29, n. 1, p. 47-54, . (98/14324-0)
BERGER, DANIELLE; KUBASKI, EVALDO TONIOLO; SEQUINEL, THIAGO; DA SILVA, RENATA MARTINS; TEBCHERANI, SERGIO MAZUREK; VARELA, JOSE ARANA. Effect of pressure-assisted thermal annealing on the optical properties of ZnO thin films. LUMINESCENCE, v. 28, n. 6, p. 942-947, . (98/14324-0, 09/11099-2)
MAZZO, TATIANA MARTELLI; DA ROCHA OLIVEIRA, LUCAS MENDONCA; MACARIO, LEILANE ROBERTA; AVANSI, JR., WALDIR; ANDRE, RAFAELA DA SILVEIRA; VIANA ROSA, IEDA LUCIA; VARELA, JOSE ARANA; LONGO, ELSON. Photoluminescence properties of CaTiO3:Eu3+ nanophosphor obtained by the polymeric precursor method. Materials Chemistry and Physics, v. 145, n. 1-2, p. 141-150, . (98/14324-0)
VETTER FERRI, ELIDIA APARECIDA; MAZZO, TATIANA MARTELLI; LONGO, VALERIA MORAES; MORAES, EDUARDO; PIZANI, PAULO SERGIO; LI, MAXIMO SIU; MARTINEZ ESPINOSA, JOSE WALDO; VARELA, JOSE ARANA; LONGO, ELSON. Very Intense Distinct Blue and Red Photoluminescence Emission in MgTiO3 Thin Films Prepared by the Polymeric Precursor Method: An Experimental and Theoretical Approach. Journal of Physical Chemistry C, v. 116, n. 29, p. 15557-15567, . (98/14324-0)
BOHNEMANN, JOERG; LIBANORI, RAFAEL; MOREIRA, MARIO L.; LONGO, ELSON. High-efficient microwave synthesis and characterisation of SrSnO3. CHEMICAL ENGINEERING JOURNAL, v. 155, n. 3, p. 905-909, . (98/14324-0)
DE SOUZA, MICHELE L.; CORIO, PAOLA. Effect of silver nanoparticles on TiO2-mediated photodegradation of Alizarin Red S. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 136, p. 325-333, . (98/14324-0, 08/03636-5, 08/57872-1)
FONSECA‚ FC; MUCCILLO‚ ENS; MUCCILLO‚ R.. Analysis of the formation of ZrO2: Y2 O3 solid solution by the electrochemical impedance spectroscopy technique. Solid State Ionics, v. 149, n. 3, p. 309-318, . (99/10798-0, 98/14324-0)
MUCCILLO, R.; CARMO, J. R.. Electrical conductivity of Ca1-xSrxTi0.65Fe0.35O3-delta, x=0, 0.5 and 1, polycrystalline compounds in the 300-500 K range. Materials Research Bulletin, v. 47, n. 5, p. 1204-1211, . (05/53241-9, 98/14324-0)
GONCALVES, RICARDO H.; CARDOSO, CLAUDIO A.; LEITE, EDSON R.. Synthesis of colloidal magnetite nanocrystals using high molecular weight solvent. Journal of Materials Chemistry, v. 20, n. 6, p. 1167-1172, . (98/14324-0)
MAZZO, TATIANA M.; MOREIRA, MARIO L.; PINATTI, IVO M.; PICON, FRANCINI C.; LEITE, EDSON R.; ROSA, IEDA L. V.; VARELA, JOSE A.; PERAZOLLI, LEINIG A.; LONGO, ELSON. CaTiO3:Eu3+ obtained by microwave assisted hydrothermal method: A photoluminescent approach. Optical Materials, v. 32, n. 9, p. 990-997, . (98/14324-0)
DALMASCHIO, CLEOCIR JOSE; LEITE, EDSON ROBERTO. Detachment Induced by Rayleigh-Instability in Metal Oxide Nanorods: Insights from TiO2. Crystal Growth & Design, v. 12, n. 7, p. 3668-3674, . (98/14324-0)

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Filed patent(s) as a result of this research project

MÉTODO E APARATO PARA OBTENÇÃO DE NANOPARTÍCULAS DE ALUMINA GAMA NA COR PRETA USANDO FORNO MICROONDAS PI0600360-5 - Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) . José Arana Varela ; Edson Roberto Leite ; Jomar Sales Vasconcelos ; Renata Cristina de Lima ; Nazaré do Socorro Lemos Silva Vasconcelos ; Carlos Alberto Paskocimas ; Elson Longo da Silva - February 2006, 09