A new formaldehyde optical sensor: detecting milk adulteration

Autor: José A. F. Gamelas, António J. S. Fernandes, Marta I.S. Veríssimo, M. Teresa S.R. Gomes, Dmitry V. Evtuguin

A sensor consisting of an optical fibre with the exposed tip coated with the polyoxometalate salt [(C4H9)4N]4H[PMo10V2O40], specially designed to be insoluble in water, which UV–Vis spectrum changed in contact with formaldehyde, is presented. The s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df41d56c6785d9dbf18b0fd3637543ec
http://hdl.handle.net/10773/36672

Determination of 5-hydroxymethylfurfural in honey, using headspace-solid-phase microextraction coupled with a polyoxometalate-coated piezoelectric quartz crystal

Autor: M. Teresa S.R. Gomes, Dmitry V. Evtuguin, José A. F. Gamelas, Marta I.S. Veríssimo

Publikováno v: Food Chemistry. 220:420-426

High concentrations of 5-hydroxymethylfurfural (HMF) in honey provide an indication of overheating under inappropriate storage conditions or aging. Conventional methods for determining HMF are cumbersome and require expensive equipment or hazardous r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::010ddaf864eae01667b4a73ae2a81a69
https://doi.org/10.1016/j.foodchem.2016.09.204

Fluorescent optrode for proteins based on a diketopyrrolopyrrole derivative: Practical application to total protein determination in urine

Autor: Vitor A. S. Almodovar, M. Teresa S.R. Gomes, Marta I.S. Veríssimo, Augusto C. Tomé

Publikováno v: Optics & Laser Technology. 130:106364

A fluorescence sensor based on a diketopyrrolopyrrole (DPP) derivative for protein detection was designed and tested in urine samples. The DPP derivative emits visible light as a solid, making this molecule particularly appealing as a recognition mol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66a4fc2587e52c748d88c04bee3dbf2f
https://doi.org/10.1016/j.optlastec.2020.106364

N-confused porphyrin immobilized on solid supports: synthesis and metal ions sensing efficacy

Autor: Ana T. P. C. Gomes, Marta I.S. Veríssimo, Ana L. Daniel-da-Silva, Carlos Lodeiro, José A. S. Cavaleiro, Sara R.D. Gamelas, Tiago Fernandes, M. Teresa S.R. Gomes, Nuno M. M. Moura, Maria G. P. M. S. Neves, Maria A. F. Faustino

Publikováno v: Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
Molecules; Volume 23; Issue 4; Pages: 867
Molecules, Vol 23, Iss 4, p 867 (2018)

Thanks are due to FCT/MEC for the financial support to the QOPNA research Unit (FCT UID/QUI/00062/2013), the CESAM (UID/AMB/50017/2013) and CICECO (POCI-01-0145-FEDER-007679 and UID/CTM/50011/2013), through national funds and when applicable co-finan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9db54951ac29e7192fd020d549f3322
http://hdl.handle.net/10773/33909

Using acoustic wave sensors to follow milk coagulation and to separate the cheeses according to the milk origin

Autor: M. Teresa S.R. Gomes, Marta I.S. Veríssimo, João Pedro Oliveira, Vânia F. Pais

Publikováno v: Sensors and Actuators B: Chemical. 207:1121-1128

Optimum coagulation temperature and cutting time are usually empirically defined. The use of inexpensive acoustic wave sensors to monitor milk coagulation allows monitoring the process in real time, since its early stages. Besides, data are collected

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94bb7297aaad732ad66d9b99269e6418