@article {Dias2023a, title = {Hydroxyapatite-Barium Titanate Biocoatings Using Room Temperature Coblasting}, journal = {Crystals 2023, Vol. 13, Page 579}, volume = {13}, number = {4}, year = {2023}, note = {

n/a

}, month = {mar}, pages = {579}, publisher = {Multidisciplinary Digital Publishing Institute}, abstract = {

The use of orthopaedic and dental implants is expanding as a consequence of an ageing population and also due to illness or trauma in younger age groups. The implant must be biocompatible, bioactive and interact favourably with the recipient{\textquoteright}s bone, as rapid osseointegration is key to success. In this work, Ti-6Al-4V plates were coated using the CoBlastTM technique, with hydroxyapatite (HAp) and HAp/BaTiO3 (barium titanate, BT) non-piezoelectric cubic nanopowders (HAp/cBT) and piezoelectric tetragonal micropowders (HAp/tBT). The addition of BT, a piezoelectric ceramic, is a strategy to accelerate osseointegration by using surface electric charges as cues for cells. For comparison with commercial coatings, plates were coated with HAp using the plasma spray technique. Using XRD and FTIR, both plasma spray and CoBlastTM coatings showed crystalline HAp and no presence of by-products. However, the XRD of the plasma-sprayed coatings revealed the presence of amorphous HAp. The average surface roughness was close to the coatings{\textquoteright} thickness (≈5 $μ$m for CoBlastTM and ≈13 $μ$m for plasma spray). Cytotoxicity assays proved that the coatings are biocompatible. Therefore, it can be concluded that for HAp-based coatings, CoBlastTM is a viable alternative to plasma spray, with the advantage of facilitating room temperature addition of other ceramics, like piezoelectric BaTiO3.

}, keywords = {barium titanate, CoBlastTM, Hydroxyapatite, plasma spray}, issn = {2073-4352}, doi = {10.3390/CRYST13040579}, url = {https://www.mdpi.com/2073-4352/13/4/579/htm https://www.mdpi.com/2073-4352/13/4/579}, author = {Dias, In{\^e}s J. G. and P{\'a}dua, A. Sofia and Pires, Eduardo A. and Borges, Jo{\~a}o PMR and Silva, Jorge C and M. Carmo Lan{\c c}a} } @article {16684, title = {Extensive Investigation on the Effect of Niobium Insertion on the Physical and Biological Properties of 45S5 Bioactive Glass for Dental Implant}, journal = {International Journal of Molecular Sciences}, volume = {24}, year = {2023}, pages = {5244-5263}, author = {Hammami, Imen and Gavinho, S{\'\i}lvia R and P{\'a}dua, Ana Sofia and Lan{\c c}a, Maria do Carmo and Jo{\~a}o Paulo Borges and Silva, Jorge Carvalho} } @conference {Dias2023, title = {TSDC and surface potential measurements of charged hydroxyapatite/BaTiO 3 biocoatings deposited by CoBlast}, booktitle = {ISE19-19th Int Symp on Electrets, 18-22 Sept.}, year = {2023}, note = {

n/a

}, pages = {77}, publisher = {Johannes Kepler Univ.}, organization = {Johannes Kepler Univ.}, address = {Linz, Austria}, abstract = {

n/a

}, keywords = {contact charging, corona charging, hard tissue engineering, Hydroxyapatite, tsdc}, author = {Dias, I.J.G. J G and P{\'a}dua, A.S. S and Pires, E and Borges, J.P.M.R. and Silva, Jorge C and MC Lan{\c c}a} } @article {Gavinho2019, title = {{Nontoxic glasses: Preparation, structural, electrical and biological properties}}, journal = {International Journal of Applied Ceramic Technology}, year = {2019}, note = {n/a}, month = {apr}, pages = {ijac.13243}, publisher = {John Wiley {\&} Sons, Ltd (10.1111)}, abstract = {n/a}, keywords = {antibacterial properties, Bioactive glass, biomaterial, cytotoxicity, electrical properties}, issn = {1546-542X}, doi = {10.1111/ijac.13243}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/ijac.13243}, author = {Gavinho, S{\'\i}lvia R and Prezas, Pedro R and Ramos, Diogo J and S{\'a}-Nogueira, Isabel and Borges, Joao P and M. Carmo Lan{\c c}a and Silva, Jorge C and Henriques, C{\'e}lia MR and Pires, Eduardo and Kumar, Jakka Suresh and Gra{\c c}a, M. P. F.} } @article {12234, title = {TSDC and impedance spectroscopy measurements on hydroxyapatite, β-tricalcium phosphate and hydroxyapatite/β-tricalcium phosphate biphasic bioceramics}, journal = {Applied Surface Science}, volume = {424}, year = {2017}, pages = {28-38}, abstract = {

Bone grafting and surgical interventions related with orthopaedic disorders consist in a big business, generating large revenues worldwide every year. There is a need to replace the biomaterials that currently still dominate this market, i.e., autografts and allografts, due to their disadvantages, such as limited availability, need for additional surgeries and diseases transmission possibilities. The most promising replacement materials are biomaterials with bioactive properties, such as the calcium phosphate-based bioceramics group. The bioactivity of these materials, i.e., the rate at which they promote the growth and directly bond with the new host biological bone, can be enhanced through their electrical polarization.In the present work, the electrical polarization features of pure hydroxyapatite (Hap), pure β-tricalcium phosphate (β-TCP) and biphasic hydroxyapatite/β-tricalcium phosphate composites (HTCP) were analyzed by measuring thermally stimulated depolarization currents (TSDC). The samples were thermoelectrically polarized at 500. {\textdegree}C under a DC electric field with a magnitude of 5. kV/cm. The biphasic samples were also polarized under electric fields with different magnitudes: 2, 3, 4 and 5. kV/cm. Additionally, the depolarization processes detected in the TSDC measurements were correlated with dielectric relaxation processes observed in impedance spectroscopy (IS) measurements.The results indicate that the β-TCP crystalline phase has a considerable higher ability to store electrical charge compared with the Hap phase. This indicates that it has a suitable composition and structure for ionic conduction and establishment of a large electric charge density, providing great potential for orthopaedic applications.

}, author = {Prezas, P. R and Melo, B. M. G and Costa, L.C. and Valente, M. A. and MC Lan{\c c}a and Ventura, J. M. G. and Pinto, LFV and Gra{\c c}a, M. P. F.} } @booklet {6330, title = {Electrical characterization of biphasic ceramics used in hard tissue replacement}, year = {2013}, note = {n/a}, pages = {217}, type = {Peer reviewed}, chapter = {217}, address = {Coimbra Portugal}, abstract = {

Hydroxyapatite [Hap; Ca10(PO4)6(OH)2) and b-tricalcium phosphate [b-TCP; Ca3(PO4)2] are biocompatible calcium phosphates used in skeletal surgery. The natural HAp is one of the main components of bone and, as a synthetic material, has been widely used for bone replacement presenting good bioactivity. Nevertheless synthetic HAp presents a slow in vivo degradation rate which is disadvantageous for bone\’s reparative process. b-TCP has also good osteogenic characteristics presenting the ability to form strong bonds with the bone however, its degradation rate is too fast [1]. Therefore, a composite combining these two ceramics is valuable as it exhibits a suitable degradation rate. Because of the piezoelectric properties of bone it is known that electrical polarization of calcium phosphates can enhance the bioactivity and biointegration of implants [2]. Previous studies have already showed that HAp/b-TCP ceramics can be electrically polarized and that electrical polarization enhances osteogenesis in the early stage of the implantation process. However further studies are required to understand, optimize and improve the polarization technique [1]. In this work a commercial biphasic ceramic powders were pressed in a mold at 200 MPa to produce disc shaped samples. Afterwards, the samples were sintered at temperatures from 950\ºC to 1150\ºC and the influence of the heat treatment in the electrical polarization and subsequent bioactivity was investigated. The samples were polarized under a high DC electric field at relatively lower temperature (200oC) compared to previous studies and the stability of polarization was tested using TSDC (thermally depolarization currents) measurements. It was studied the influence of the water, initially present in the material, in the total charge deposited during polarization, its stability and its relation with heat treatment after pressing. The influence of the addition of b-TCP on sample\’s stored charge was also evaluated. Finally bioactivity tests in a simulated body fluid solution were made taking into account the signal of the charge in each surface of the disc samples so that the results could be compared to previous ones.

}, author = {Pedrosa AS and Borges JPMR and Neagu E and Marat-Mendes JN and Lan{\c c}a MCH} } @inbook {7816, title = {Water Content Control To Improve Space Charge Storage in a Cork Derivative}, booktitle = {Advanced Materials Forum Vi, Pts 1 and 2}, series = {Materials Science Forum}, volume = {730-732}, year = {2013}, note = {

Gil, Luis/B-2908-2013; Dias, Carlos /J-4947-2013; Lanca, M. Carmo/A-4437-2013 Dias, Carlos /0000-0003-3042-5029; Lanca, M. Carmo/0000-0001-9258-4899 6th International Materials Symposium (MATERIALS 2011)/15th Meeting of SPM Apr 18-20, 2011 Univ Minho, Guimaraes, PORTUGAL Portuguese Mat Soc; Univ Minho, Sch Engn; Portuguese Fdn Sci \& Technol; Ctr Mech \& Mat Technol; Inst Polym \& Composites; 3Bs Res Grp Biomaterials Biodegradables \& Biomimet; Minho Univ, Ctr Phys; Um, Sch Sci; TecMinho; Town Hall Guimaraes; Beneq; Celoplas; Filsat; Izasa; Leica MicroSystems; Mario Costa Martins \& Filho Lda; Panalytical; ScienTec 0255-5476

}, pages = {395-400}, type = {Book Section}, abstract = {n/a}, isbn = {*****************}, doi = {10.4028/www.scientific.net/MSF.730-732.395}, url = {://WOS:000315545200066}, author = {Lanca, M. C. and Cunha, I. and J. P. Marques and Neagu, E. R. and Gil, L. and Dias, C. J. and Marat-Mendes, J. N.}, editor = {Pinto, AMP and Pouzada, AS} } @conference {Cunha_In{\^e}s:2012, title = {Water Content Control to Improve Space Charge Storage in a Cork Derivative}, series = {Materials Science Forum}, year = {2012}, note = {n/a}, month = {Jan}, pages = {395-400}, type = {Peer reviewed}, abstract = {n/a}, author = {Cunha In{\^e}s and Marques Jo{\~a}o Paulo and Gil Lu{\'\i}s and Neagu E. R. and Dias C. J. and Marat-Mendes J. N. and Lan{\c c}a M. C.} } @conference {6332, title = {Water Content Control to Improve Space Charge Storage in a Cork Derivative}, booktitle = {Materiais2011}, series = {Materials Science Forum}, year = {2012}, note = {n/a}, type = {Peer reviewed}, abstract = {n/a}, doi = {10.4028/www.scientific.net/MSF.730-732.395}, author = {Cunha In{\^e}s and Marques Jo{\~a}o Paulo and Gil Lu{\'\i}s and Neagu E. R. and Dias C. J. and Marat-Mendes J. N. and Lan{\c c}a M. C.} } @article {7837, title = {Water Content Control to Improve Space Charge Storage in a Cork Derivative}, volume = {730-732}, year = {2012}, note = {n/a}, pages = {395-400}, type = {Journal Article}, abstract = {n/a}, author = {M.C., Lan and I., Cunha and Paulo, Marques Jo and GIL L. and NEAGU E.R. and DIAS C.J. and N., Marat-Mendes Jose} } @conference {Neagu_E._R.:2011, title = {Discrimination between Space Charge and Dipolar Contributions in Ferroelectric Polymers}, series = {International Symposium on Electrets}, year = {2011}, note = {n/a}, month = {Jan}, pages = {145-146}, type = {Peer reviewed}, abstract = {n/a}, author = {Neagu E. R. and Dias, C. and Lan{\c c}a M. Carmo and Igreja R. and Inacio P. and Marat-Mendes J. N.} } @article {Neagu_ER:2011, title = {The use of the final thermally stimulated discharge current technique to study the molecular movements around glass transition}, volume = {354}, year = {2011}, note = {n/a}, month = {Jan}, pages = {385-390}, type = {Peer reviewed}, abstract = {n/a}, author = {Neagu ER and Dias CJ and Lan{\c c}a MC and Igreja R and Inacio P and Marat-Mendes J. N.} } @conference {6338, title = {Discrimination between Space Charge and Dipolar Contributions in Ferroelectric Polymers}, booktitle = {14th International Symposium on Electrets}, series = {International Symposium on Electrets}, year = {2011}, note = {n/a}, type = {Peer reviewed}, abstract = {

The final thermally stimulated discharge current method allows a better selection of the experimental conditions for sample polarization. By decreasing the ratio between the charging time and the discharging time, the apparent peak is of the same order of magnitude as the genuine peaks and there is only a partial overlap between then. Two peaks have been identified for polyamide 11, one associated with the glass transition around 60 \°C and the second associated with the Curie transition around 96 \°C.

}, isbn = {978-1-4577-1025-4}, doi = {10.1109/ISE.2011.6085024}, author = {Neagu E. R. and Dias, C. and Lan{\c c}a M. Carmo and Igreja R. and Inacio P. and Marat-Mendes J. N.} } @conference {6337, title = {Influence of Polarization on the Bioactivity of Nanopowders of Hydroxyapatite}, booktitle = {14th International Symposium on Electrets}, series = {International Symposium on Electrets}, year = {2011}, note = {n/a}, type = {Peer reviewed}, abstract = {n/a}, isbn = {978-1-4577-1025-4}, doi = {10.1109/ISE.2011.6084979}, author = {Pedrosa A. and LAN{\c C}A M.C. and Borges J.P. and NEAGU E.R. and DIAS C.J. and Marat-Mendes and {J.N.} Varandas} } @article {7858, title = {Influence of Polarization on the Bioactivity of Nanopowders of Hydroxyapatite}, journal = {2011 14th International Symposium on Electrets (Ise)}, year = {2011}, note = {n/a}, pages = {55-56}, type = {Journal Article}, abstract = {n/a}, issn = {978-1-4577-1025-4}, author = {Pedrosa, A. and Lanca, M. C. and J.P. Borges and Neagu, E. R. and Dias, C. J. and Marat-Mendes, J. N. and Ieee} } @book {7859, title = {Influence of Polarization on the Bioactivity of Nanopowders of Hydroxyapatite}, year = {2011}, note = {

Pedrosa, A. Lanca, M. C. Borges, J. P. Neagu, E. R. Dias, C. J. Marat-Mendes, J. N. ISE 14th International Symposium on Electrets (ISE) AUG 28-31, 2011 Montpellier, FRANCE

}, pages = {55-56}, type = {Book}, abstract = {n/a}, isbn = {978-1-4577-1025-4}, doi = {10.1109/ISE.2011.6084979}, url = {://WOS:000298852900028}, author = {Pedrosa, A. and Lanca, M. C. and J.P. Borges and Neagu, E. R. and Dias, C. J. and Marat-Mendes, J. N. and Ieee} } @article {6335, title = {The use of the final thermally stimulated discharge current technique to study the molecular movements around glass transition}, volume = {354}, year = {2011}, note = {n/a}, type = {Peer reviewed}, abstract = {

During electric polarization charge is injected into the material. The structure is decorated with space charge and during the subsequent heating an apparent peak and the genuine peaks that are related to dipole randomization and charge detrapping are observed. The method is used here to analyze the molecular movements in polyimide in the temperature range from 293 to 623K. Two weak relaxations have been observed around 337K and around 402K. The electrical conductivity changes with temperature in agreement with the Arrhenius law only below (W=(0.84\±0.03) eV ) and above ( W=(0.82\±0.03) eV) the temperature range where the \β relaxation is observed. The variation of the electrical conductivity with temperature, in the range of the \β relaxation, is controlled by the variation of the charge currier mobility with temperature and it shows a non-Arrhenius behavior. We suggest that the \β1 sub-glass relaxation is related to the rotation or oscillation of phenyl groups and the \β2 sub-glass relaxation is related to the rotation or oscillation of the imidic ring. At higher temperatures an apparent peak was observed. The relaxation time of the trapped charge, at 573K, is high than 8895s.

}, doi = {10.1016/j.jnoncrysol.2010.05.095}, author = {Neagu ER and Dias CJ and Lan{\c c}a MC and Igreja R and Inacio P and Marat-Mendes J. N.} } @conference {Neagu_ER:2010, title = {Charge Carriers Injection/Extraction at the Metal-Polymer Interface and Its Influence in the Capacitive Microelectromechanical Systems-Switches Actuation Voltage}, booktitle = {JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY}, series = {JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY}, volume = {10}, year = {2010}, note = {n/a}, month = {Jan}, pages = {2503-2511}, publisher = {Univ Nova Lisboa}, organization = {Univ Nova Lisboa}, abstract = {n/a}, author = {Neagu ER and Dias CJ and Lanca MC and Igreja R and Inacio P and Marat-Mendes JN} } @conference {Neagu_ER:2010, title = {Electrical Method to Study the Weak Molecular Movements at Nanometric Scale in Low Mobility Materials}, series = {Materials Science Forum}, volume = {636-637}, year = {2010}, note = {n/a}, month = {Jan}, pages = {430-436}, type = {Peer reviewed}, abstract = {n/a}, author = {Neagu ER and Neagu RM and Dias CJ and Lanca MC and Inacio P and Marat-Mendes JN} } @conference {Neagu_ER:2010, title = {On the width of the thermally stimulated discharge current peak}, series = {IEEE International Conference on Solid Dielectrics-ICSD}, year = {2010}, note = {n/a}, month = {Jan}, type = {Peer reviewed}, abstract = {n/a}, author = {Neagu ER and Dias CJ and Lanca MC and Igreja R and Inacio P and Marat-Mendes JN} } @conference {Neagu_ER:2010, title = {The study of the molecular movements in the range of glass transition by the final thermally stimulated discharge current technique}, series = {IEEE International Conference on Solid Dielectrics-ICSD}, year = {2010}, note = {n/a}, month = {Jan}, type = {Peer reviewed}, abstract = {n/a}, author = {Neagu ER and Dias CJ and Lanca MC and Igreja R and Inacio P and Marat-Mendes JN} } @conference {Lanca_MC:2008, title = {Electrical Properties Studies of a Cork/TetraPak (R)/Paraffin Wax Composite}, booktitle = {Advanced Materials Forum Iv}, series = {Materials Science Forum}, volume = {587-588}, number = {587-588}, year = {2008}, note = {n/a}, month = {Jan}, pages = {613-617}, abstract = {n/a}, url = {://000259898200122}, author = {Lanca MC and Peuckert S and Neagu ER and Gil L and Silva PC and Marat-MendeS J}, editor = {Marques AT, Silva AF, Baptista APM, Sa C, Alves F, Malheiros LF, Vieira M} } @inbook {7832, title = {Electrical Properties Studies of a Cork/TetraPak (R)/Paraffin Wax Composite}, booktitle = {Advanced Materials Forum Iv}, series = {Materials Science Forum}, volume = {587-588}, year = {2008}, note = {

Lanca, M. Carmo Peuckert, Stefan Neagu, Eugen R. Gil, Luis Silva, Paulo C. Marat-Mendes, Jose 13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium APR 01-04, 2007 Oporto, PORTUGAL

}, pages = {613-617}, type = {Book Section}, abstract = {

Lately the electrical and dielectric properties of cork and some cork-based materials (commercial and non-commercial) have been studied in order to understand their ability to store electrical charge. The main problem found so far is related to the water content in cork, only of a few \% weight. but large enough to influence greatly the conductivity of cork and, consequently, the charge storage capability. To overcome this problem cork has been combined with hydrophobic materials. In this work a commercial wax (paraffin wax) was used to produce a cork/paraffin composite by hot pressing. After milled and mixed natural cork. TetraPak (R) containers waste and paraffin were pressed to make plaques of a new composite. Different concentrations of cork. TetraPak (R) and paraffin, different granules sire, different temperature and pressure were used to produce the samples. The electrical properties of the new composite were measured by the isothermal charging and discharging current method and the results compared to previously ones obtained for natural cork and other derivative products. The new composite has shown to have lower conductivity than the commercial agglomerate. which makes it a better material for charge storage.

}, isbn = {0255-5476}, url = {://000259898200122}, author = {Lanca, M. C. and Peuckert, S. and Neagu, E. R. and Gil, L. and Silva, P. C. and Marat-Mendes, J.}, editor = {Marques, AT and Silva, AF and Baptista, APM and Sa, C and Alves, FJLA and Malheiros, LF and Vieira, M} } @article {7833, title = {Electrical Properties Studies of a Cork/TetraPak (R)/Paraffin Wax Composite}, journal = {Advanced Materials Forum Iv}, volume = {587-588}, year = {2008}, note = {

Lanca, M. Carmo Peuckert, Stefan Neagu, Eugen R. Gil, Luis Silva, Paulo C. Marat-Mendes, Jose Marques, AT Silva, AF Baptista, APM Sa, C Alves, FJLA Malheiros, LF Vieira, M 13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium APR 01-04, 2007 Oporto, PORTUGAL

}, pages = {613-617}, type = {Journal Article}, abstract = {

Lately the electrical and dielectric properties of cork and some cork-based materials (commercial and non-commercial) have been studied in order to understand their ability to store electrical charge. The main problem found so far is related to the water content in cork, only of a few \% weight. but large enough to influence greatly the conductivity of cork and, consequently, the charge storage capability. To overcome this problem cork has been combined with hydrophobic materials. In this work a commercial wax (paraffin wax) was used to produce a cork/paraffin composite by hot pressing. After milled and mixed natural cork. TetraPak (R) containers waste and paraffin were pressed to make plaques of a new composite. Different concentrations of cork. TetraPak (R) and paraffin, different granules sire, different temperature and pressure were used to produce the samples. The electrical properties of the new composite were measured by the isothermal charging and discharging current method and the results compared to previously ones obtained for natural cork and other derivative products. The new composite has shown to have lower conductivity than the commercial agglomerate. which makes it a better material for charge storage.

}, issn = {0255-5476}, url = {://WOS:000259898200122}, author = {Lanca, M. C. and Peuckert, S. and Neagu, E. R. and Gil, L. and Silva, P. C. and Marat-Mendes, J.} } @inbook {7835, title = {Electrical Properties Studies of a Cork/TetraPak (R)/Paraffin Wax Composite}, booktitle = {Advanced Materials Forum Iv}, series = {Materials Science Forum}, volume = {587-588}, year = {2008}, note = {

Times Cited: 1 13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium APR 01-04, 2007 Oporto, PORTUGAL

}, pages = {613-617}, type = {Book Section}, abstract = {

Lately the electrical and dielectric properties of cork and some cork-based materials (commercial and non-commercial) have been studied in order to understand their ability to store electrical charge. The main problem found so far is related to the water content in cork, only of a few \% weight. but large enough to influence greatly the conductivity of cork and, consequently, the charge storage capability. To overcome this problem cork has been combined with hydrophobic materials. In this work a commercial wax (paraffin wax) was used to produce a cork/paraffin composite by hot pressing. After milled and mixed natural cork. TetraPak (R) containers waste and paraffin were pressed to make plaques of a new composite. Different concentrations of cork. TetraPak (R) and paraffin, different granules sire, different temperature and pressure were used to produce the samples. The electrical properties of the new composite were measured by the isothermal charging and discharging current method and the results compared to previously ones obtained for natural cork and other derivative products. The new composite has shown to have lower conductivity than the commercial agglomerate. which makes it a better material for charge storage.

}, url = {://WOS:000259898200122}, author = {Lanca, M. Carmo and Peuckert, Stefan and Neagu, Eugen R. and Gil, Luis and Silva, Paulo C. and Marat-Mendes, Jose}, editor = {Marques, AT and Silva, AF and Baptista, APM and Sa, C and Alves, FJLA and Malheiros, LF and Vieira, M} } @inbook {7836, title = {Electrical Properties Studies of a Cork/TetraPak (R)/Paraffin Wax Composite}, booktitle = {Advanced Materials Forum Iv}, volume = {587-588}, year = {2008}, note = {n/a}, pages = {613-617}, type = {Book Section}, abstract = {n/a}, isbn = {0255-5476;*****************}, author = {Lanca, M. Carmo and Peuckert, Stefan and Neagu, Eugen R. and Gil, Luis and Silva, Paulo C. and Marat-Mendes, Jose and Marques, AT and Silva, AF and Baptista, APM and Sa, C and Alves, FJLA and Malheiros, LF and Vieira, M} } @conference {Lanca_MC:2006, title = {Study of electrical properties of natural cork and two derivative products}, booktitle = {Advanced Materials Forum Iii, Pts 1 and 2}, series = {Materials Science Forum}, volume = {514-516}, number = {514-516}, year = {2006}, note = {n/a}, month = {Jan}, pages = {940-944}, abstract = {n/a}, author = {Lanca MC and Neagu ER and Silva P and Gil L and Marat-MendeS J} } @article {Judeinstein_P:2000, title = {Pore dimension of water trees in PE: NMR studies}, journal = {POLYMER}, volume = {41}, year = {2000}, note = {n/a}, month = {Jan}, pages = {8151-8154}, publisher = {Univ Paris 11, Univ Nova Lisboa, Univ Paris 11, Univ Paris 11}, abstract = {n/a}, author = {Judeinstein P and Lanca MC and Marat-MendeS J and Rault J} }