177,974 research outputs found
Ercole Gonzaga, Adamo Scultori e le pitture nella torre di Paolo III in Araceli, in Scritti in onore di Daniela Ferrari, a cura di R. Piccinelli, D. Shemek, Verona, Scripta 2019, pp. 291-295
No full textA Passivity-Based Bilateral Teleoperation Architecture using Distributed Nonlinear Model Predictive Control
No full textBilateral teleoperation systems allow the telepresence of an operator while working remotely. Such ability becomes crucial when dealing with critical environments like space, nuclear plants, rescue, and surgery. The main properties of a teleoperation system are the stability and the transparency which, in general, are in contrast and they cannot be fully achieved at the same time. In this paper, we will present a novel model predictive controller that implements a passivity-based bilateral teleoperation algorithm. Our solution mitigatesthe chattering issue arising when resorting to the energy tank(or reservoir) mechanism by forcing the passivity as a hard constraint on the system evolution
“Passando tra noi [...]così stretta unione d’animo”: diplomazia e relazioni artistiche tra i ducati di Mantova e Modena
No full textThe Kafala and the protection of minors. Reflections after the Second Italian-Moroccan Colloquium on Comparative Law
No full textBreve ragguaglio delle sculture in zucchero in epoca moderna. Ovvero Saccarum thriumphans alla corte di Carlo II Gonzaga di Nevers
No full textIl campo della conoscenza delle tecniche scultoree e della produzione plastica di età moderna ha ignorato una delle applicazioni di questa pratica artistica, e cioè l’uso dello zucchero come materiale per la scultura. È pur vero che, al momento, nessuna scultura in zucchero è scampata al transito del tempo e che la storia di queste creazioni è ben lungi dall’essere solo abbozzata, tuttavia la sopravvivenza di tanti documenti, libretti e fonti archivistiche che ne parlano e descrivono intere scene allestite con sculture colorate e dorate, alte anche due metri, ha fatto riemergere un ambito a tutt’oggi parzialmente inesplorato
A novel luminescent Europium(III) complexes for citrate detection.
No full textRationally designed Eu(III) complexes can be exploited as probes in the detection of analytes in biological fluids, by means of luminescence.[1] These complexes must be stable in aqueous solution, absorb and efficiently transfer the UV excitation to the metal ion (antenna effect). We succeeded to obtain this goal by including isoquinoline antenna into the ligand backbone. In fact, the luminescence of [Eu(bisoQcd)]+ (Figure 1) and Eu(isoQC3A) complexes significantly increases in the presence of the main analytes which constitute the interstitial extracellular fluid (i.e. hydrogen carbonate, serum albumin (SA) and citrate).[2,3]. Eu(III) complex suitable for citrate sensing The optical response of our Eu(III)-based probes is selective towards citrate molecule, when a complex matrix is considered. Citrate molecule is a very important bio-analyte and the monitoring of its concentration is crucial in order to identify the presence of metabolic disease.[4] When a simulated interstitial extracellular fluid is employed, the change of the citrate concentration gives rise to an increase of the Eu(III) luminescence emission intensity of [Eu(bisoQcd)]+. On the other hand, negligible or no change of the luminescence intensity was detected when the concentration of both hydrogen carbonate and SA is changed. This is due to citrate capacity to displace a higher number of water molecules giving a distinctive increase of the luminescence intensity. Moreover, the Eu(III) intrinsic quantum yield of the adduct is higher.
The obtained results candidate our europium complexes as viable probes for luminescence analysis of biofluids with complex matrix.
Acknowledgments: The work was financially supported by PRIN project "CHIRALAB", grant n.
20172M3K5N.
[1] J.-C.G. Bünzli, Chem. Rev. 2010, 110, 2729.
[2] C. De Rosa, A. Melchior, M. Sanadar, M. Tolazzi, A. Giorgetti, R. P. Ribeiro, C. Nardon, F.
Piccinelli, Inorg Chem. 2020, 59, 12564.
[3] C. De Rosa, A. Melchior, M. Sanadar, M. Tolazzi, A. Duerkop, F. Piccinelli, Dalton Trans. 2021, 50, 4700.
[4] L. C. Costello, R. B. Franklin, Prostate Cancer Prostatic Dis. 2009, 12, 1
Development and Perspectives of Islamic Economics (banking and finance) in the West
No full textAbout forty years ago, with the establishment in 1975 of the Islamic Development Bank in Jeddah, the new Islamic approach to banking operations took its first steps outside the Muslim world. From the 1980s and early 1990s, in particular, mainly as a consequence of the enormous increase in oil prices, along with the consciousness of a common religious and cultural identity, Islamic banking and finance has grown stronger and consolidated, becoming able to compete worldwide with conventional systems through “shari‘a compliant” operations
“Passando tra noi [...]così stretta unione d’animo”: diplomazia e relazioni artistiche tra i ducati di Mantova e Modena
No full text
Luminescent Eu(III) complexes as probes for citrate sensing in complex matrix.
No full textRationally designed Eu(III) complexes can be exploited as probes in the detection of important analytes in biological fluids, by means of luminescence.[1] These complexes must be stable in aqueous solution, absorb and efficiently transfer the UV excitation to the metal ion (antenna effect). We succeeded to obtain this goal by including isoquinoline antenna into the ligand backbone. In fact, the luminescence of [Eu(bisoQcd)]+ and Eu(isoQC3A) complexes significantly increases in the presence of the main analytes which constitute the interstitial extracellular fluid (i.e. hydrogen carbonate, serum albumin (SA) and citrate at their typical concentration).[2,3]
The optical response of our Eu(III)-based probes is selective towards citrate molecule, when a complex matrix is considered. Citrate molecule is a very important bio-analyte and since it is involved in many metabolic pathway, the monitoring of its concentration is crucial in order to identify the presence of metabolic disease.[4] When a simulated interstitial extracellular fluid is employed, the change of the citrate concentration gives rise to an increase of the Eu(III) luminescence emission intensity of [Eu(bisoQcd)]+. On the other hand, negligible or no change of the luminescence intensity was detected when the concentration of both hydrogen carbonate and SA is changed. Such a finding opens up the possibility to determine quantitatively the citrate anion in complex matrices up to concentrations of 500 μM.
Actually, all the main analytes present in this biological fluid show a similar affinity for the Eu(III) complexes and directly interact with the metal ion displacing a variable number of water molecules from the inner coordination sphere. As well known, this phenomenon produces a peculiar increase of the luminescence intensity stemming from Eu(III). Differently than hydrogen carbonate and SA, we demonstrate that citrate is capable to displace a higher number of water molecules giving a distinctive increase of the luminescence intensity. Moreover, the Eu(III) intrinsic quantum yield of the adduct is higher.
The obtained results candidate our europium complexes as viable probes for luminescence analysis of biofluids with complex matrix.
Acknowledgments: The authors thank the Italian Ministry of education, university and research for the received funds (PRIN (Progetti di Ricerca di Rilevante Interesse Nazionale) project "CHIRALAB", grant n. 20172M3K5N).
References:
[1] J.-C.G. Bünzli, Chem. Rev. 2010, 110 (5), 2729-2755.
[2] C. De Rosa, A. Melchior, M. Sanadar, M. Tolazzi, A. Giorgetti, R. P. Ribeiro, C. Nardon, F. Piccinelli, Inorg Chem. 2020, 59 (17), 12564-12577.
[3] C. De Rosa, A. Melchior, M. Sanadar, M. Tolazzi, A. Duerkop, F. Piccinelli, Dalton Trans. 2021, 50 (13), 4700-4712.
[4] L. C. Costello, R. B. Franklin, Prostate Cancer Prostatic Dis. 2009, 12 (1), 17-24
- …
