170 documents found, page 1 of 17
CRISPR/Cas13 for the Control of Plant Viruses
Ribeiro, J. A.; Varanda, C.M.R.; Materatski, P.; Campos, M.D.; Patanita, M.; Albuquerque, A.; Garrido, N.; Monteiro, T.; Santos, F.; Félix, M.R.F.Plant viruses are one of the main threats to crops and food security worldwide, being very difficult to monitor and control. Since there are no effective chemical products against plant viruses, using virus-resistant plants is often the only option. Many promising strategies have been developed to engineer virus resistance however, several setbacks have hampered their utility in agriculture. In prokaryotes, clu...
Avaliação do balanço de água e de sais no solo em três culturas permanentes do ...
Monteiro, T.; Ramos, T.B.; Darouich, H.; Oliveira, A.R.; Farzamian, M.; Castanheira, N.; Paz, A.M.; Alexandre, C.; Gonçalves, M.C.O regadio é fundamental para a produção agrícola em Portugal. As previsões de alterações climáticas mostram uma tendência para verões mais quentes e secos, e precipitação com uma maior irregularidade na sua distribuição. O aumento de evapotranspiração associado à rega poderá levar a uma maior concentração de sais no solo e por consequência, a um aumento do risco de salinização e da perda de produção das cultura...
Avaliação do balanço de água e de sais no solo em três culturas permanentes do ...
Monteiro, T.; Ramos, T. B.; Darouich, H.; Oliveira, A. R.; Farzamian, M.; Castanheira, N.; Paz, A. M.; Alexandre, C.; Gonçalves, M.C.O regadio é fundamental para a produção agrícola em Portugal. As previsões de alterações climáticas mostram uma tendência para verões mais quentes e secos, e precipitação com uma maior irregularidade na sua distribuição. O aumento de evapotranspiração associado à rega poderá levar a uma maior concentração de sais no solo e por consequência, a um aumento do risco de salinização e da perda de produção das cultura...
The impact of physiological buffer solutions on zinc oxide nanostructures: zinc...
Rodrigues, J.; Pereira, S. O.; Zanoni, J.; Falcão, B. P.; Santos, N. F.; Moura, J. P.; Soares, M. R.; Rino, L.; Costa, F. M.; Monteiro, T.Zinc oxide (ZnO) nanostructures have been widely used in biosensor applications. However, little attention has been given to the interaction of ZnO structures with physiological buffer solutions. In the present work, it is shown that the use of buffers containing phosphate ions leads to the modification of the ZnO tetrapodal micro/nanostructures when immersed in such solutions for several hours, even at the phy...
Label-free nanoscale ZnO tetrapod-based transducers for tetracycline detection
Brás, M.; Zanoni, J.; Falcão, B. P.; Leitão, J. P.; Costa, F. M.; Monteiro, T.; Pereira, S. O.; Rodrigues, J.Antibiotic pollution of freshwaters and even food products has become an important concern worldwide. Hence, it is of utmost importance to develop cost-effective and reliable devices that can provide information on the presence of such contaminants to the general population. In the present work, zinc oxide (ZnO) nanotetrapods (NTP) produced via a high yield laser processing approach were used as transducers in ...
Boosting the optical properties of polylactic acid/ lanthanide-based metal-orga...
Simões, R.; Rodrigues, J.; Granadeiro, C.M.; Rino, L.; Neto, V.; Monteiro, T.; Gonçalves, G.Luminescent lanthanide metal-organic frameworks (LnMOF) are gathering much interest in the scientific community due to their exceptional optical properties, which have the potential to revolutionize several application fields, including anti-counterfeiting. The traceability of the original products is an ever- growing demand for producers and end-users to verify the authenticity of produced goods. Following this ...
Electrochemical and photoluminescence response of laser-induced graphene/electr...
Santos, N. F.; Rodrigues, J.; Pereira, S. O.; Fernandes, A. J. S.; Monteiro, T.; Costa, F. M.The inherent scalability, low production cost and mechanical flexibility of laser-induced graphene (LIG) combined with its high electrical conductivity, hierarchical porosity and large surface area are appealing characteristics for many applications. Still, other materials can be combined with LIG to provide added functionalities and enhanced performance. This work exploits the most adequate electrodeposition p...
Photoluminescence investigations of ZnO micro/nano structures
Rodrigues, J.; Sedrine, N. Ben; Correia, M.R.; Monteiro, T.Zinc oxide (ZnO) is probably one of the most researched wide bandgap semiconductors in the last decades due to its unique characteristics in terms of low production cost, high availability, bioinertness, and especially its interesting optical properties. Although this semiconductor is considered an ‘old’ material and is known to possess such unique properties for more than three decades, the interest was renewe...
Insights on luminescence quenching of ZnO tetrapods in the detection of hCG
Rodrigues, J.; Pereira, S. O.; Santos, N. F.; Rodrigues, C.; Costa, F. M.; Monteiro, T.Metal oxide semiconductors, and particularly zinc oxide (ZnO), are amongst the most investigated materials to be applied as transducer elements in biosensing devices due to properties as biochemical stability, biocompatibility and functionalisation simplicity. In the present work, ZnO nanotetrapods were produced by the laser-assisted flow deposition technique to be used as transducers in a photoluminescence (PL...
Luminescence properties of MOCVD grown Al0.2Ga0.8N layers implanted with Tb
Rodrigues, J.; Fialho, M.; Magalhães, S.; Lorenz, K.; Alves, E.; Monteiro, T.AlxGa1-xN (x = 0.20) layers grown on (0001) sapphire substrates by metal organic chemical vapour deposition were implanted with terbium (Tb) ions at 150 keV with a fluence of 7 × 1014 Tb cm−2 at different temperatures. After thermal annealing, all layers evidenced the Tb-related 5D4-7FJ intra-4f8 transitions, demonstrating an enhancement of their intensity with increasing implantation temperature. A detailed sp...