27 research outputs found

    Restorative materials without Bis-GMA – myth or reality?

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    Abstract in proceedings of the Fourth International Congress of CiiEM: Health, Well-Being and Ageing in the 21st Century, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from 3–5 June 2019.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.info:eu-repo/semantics/publishedVersio

    Translucency evaluation of an ultra-translucent monolithic zirconia and a super translucent multilayer zirconia : a pilot study on the thickness effect

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    Abstract in proceedings of the Fourth International Congress of CiiEM: Health, Well-Being and Ageing in the 21st Century, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from 3–5 June 2019.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.info:eu-repo/semantics/publishedVersio

    Translucency of HT lithium disilicate specimens with different thicknesses : preliminary study

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    Abstract in proceedings of the Fourth International Congress of CiiEM: Health, Well-Being and Ageing in the 21st Century, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from 3–5 June 2019.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.info:eu-repo/semantics/publishedVersio

    O efeito dos selantes de superfície na estabilidade de cor das resinas compostas

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    Poster apresentado no XXXIV Congresso Anual da Sociedade Portuguesa de Estomatologia e Medicina Dentária (SPEMD), 9-11 Outubro 2014, Auditórios do Centro Hospitalar e Universitário de Coimbra.Under a Creative Commons license - http://creativecommons.org/licenses/by-nc-nd/3.0

    Suscetibilidade dentária à pigmentação após branqueamento em ambulatório

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    Poster apresentado no XXXV Congresso Anual da Sociedade Portuguesa de Estomatologia e Medicina Dentária (SPEMD), 9-10 Outubro 2015, Centro de Congressos do Lagoas Park, Oeiras, Lisboa.Under a Creative Commons license - http://creativecommons.org/licenses/by-nc-nd/4.0

    Avaliação da fluorescência de 2 resinas compostas após imersão em soluções pigmentantes

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    Poster apresentado no XXXV Congresso Anual da Sociedade Portuguesa de Estomatologia e Medicina Dentária (SPEMD), 9-10 Outubro 2015, Centro de Congressos do Lagoas Park, Oeiras, Lisboa.Under a Creative Commons license - http://creativecommons.org/licenses/by-nc-nd/4.0

    Influência da clorexidina na resistência adesiva à dentina : duas estratégias adesivas

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    Poster apresentado no XXXVIII Congresso Anual da SPEMD, 12-13 Outubro 2018, OeirasN/

    Translucidez de diferentes espessuras de zircónia : estudo preliminar

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    Poster apresentado no XXXVIII Congresso Anual da SPEMD, 12-13 Outubro 2018, OeirasN/

    PLS-R calibration models for wine spirit volatile phenols prediction by Near-Infrared Spectroscopy

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    Near-infrared spectroscopic (NIR) technique was used, for the first time, to predict volatile phenols content, namely guaiacol, 4-methyl-guaiacol, eugenol, syringol, 4-methyl-syringol and 4- allyl-syringol, of aged wine spirits (AWS). This study aimed to develop calibration models for the volatile phenol’s quantification in AWS, by NIR, faster and without sample preparation. Partial least square regression (PLS-R) models were developed with NIR spectra in the near-IR region (12,500–4000 cm−1 ) and those obtained from GC-FID quantification after liquid-liquid extraction. In the PLS-R developed method, cross-validation with 50% of the samples along a validation test set with 50% of the remaining samples. The final calibration was performed with 100% of the data. PLS-R models with a good accuracy were obtained for guaiacol (r2 = 96.34; RPD = 5.23), 4-methyl-guaiacol (r2 = 96.1; RPD = 5.07), eugenol (r2 = 96.06; RPD = 5.04), syringol (r2 = 97.32; RPD = 6.11), 4-methylsyringol (r2 = 95.79; RPD = 4.88) and 4-allyl-syringol (r2 = 95.97; RPD = 4.98). These results reveal that NIR is a valuable technique for the quality control of wine spirits and to predict the volatile phenols content, which contributes to the sensory quality of the spirit beverages.info:eu-repo/semantics/publishedVersio
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