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- 저자 : Ragon, Florence (검색결과 5 건)
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Ragon, Florence,Horcajada, Patricia,Chevreau, Hubert,Hwang, Young Kyu,Lee, U-Hwang,Miller, Stuart R.,Devic, Thomas,Chang, Jong-San,Serre, Christian American Chemical Society 2014 Inorganic Chemistry Vol.53 No.5
<P>The synthesis optimization and scale-up of the benchmarked microporous zirconium terephthalate UiO-66(Zr) were investigated by evaluating the impact of several parameters (zirconium precursors, acidic conditions, addition of water, and temperature) over the kinetics of crystallization by time-resolved in situ energy-dispersive X-ray diffraction. Both the addition of hydrochloric acid and water were found to speed up the reaction. The use of the less acidic ZrOCl<SUB>2</SUB>·8H<SUB>2</SUB>O as the precursor seemed to be a suitable alternative to ZrCl<SUB>4</SUB>·<I>x</I>H<SUB>2</SUB>O, avoiding possible reproducibility issues as a consequence of the high hygroscopic character of ZrCl<SUB>4</SUB>. ZrOCl<SUB>2</SUB>·8H<SUB>2</SUB>O allowed the formation of smaller good quality UiO-66(Zr) submicronic particles, paving the way for their use within the nanotechnology domain, in addition to higher reaction yields, which makes this synthesis route suitable for the preparation of UiO-66(Zr) at a larger scale. In a final step, UiO-66(Zr) was prepared using conventional reflux conditions at the 0.5 kg scale, leading to a rather high space-time yield of 490 kg m<SUP>–3</SUP> day<SUP>–1</SUP>, while keeping physicochemical properties similar to those obtained from smaller scale solvothermally prepared batches.</P><P>In situ energy-dispersive X-ray diffraction studies for the understanding and scale-up of the porous zirconium terephthalate UiO-66(Zr). The crystallization of the porous metal−organic framework UiO-66(Z) was studied by in situ energy-dispersive X-ray diffraction experiments to approach its formation and investigate the influence of different synthetic conditions. These experiments allow optimizing and up-scaling the synthesis of this phase at the 0.5 kg scale.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2014/inocaj.2014.53.issue-5/ic402514n/production/images/medium/ic-2013-02514n_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ic402514n'>ACS Electronic Supporting Info</A></P>
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Rosa Ragone,Pasquale Crupi,Sara Piccinonna,Carlo Bergamini,Francesco Mazzone,Francesco P. Fanizzi,Francesco P. Schena,Donato Antonacci 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.3
There is increasing interest in development of methods for wine characterization to guarantee traceability and product safety. Metabolomics represents a valuable tool to trace the metabolic fingerprint of complex mixtures. Wines from 22 pure varieties (autochthonous from Southern Italy and grown in the same area of Apulia) were genetically identified and metabolically characterized using both NMR and HPLC-MS. NMR associated with chemometrics was used to identify amino acid (proline, alanine, and tyrosine), organic acid (malic, lactic, acetic, and succinic acids), alcohol (2-phenylethanol), sugar (sucrose), and polyphenol (gallic acid) contents. Minor components of wines were determined using HPLC-MS analyses. Wines showed potential health-promoting effects with good amounts of phenolic compounds. In particular, consistent levels of trans-resveratrol and flavonoids were found in Negro Amaro, Uva di Troia, Ancellotta, and Montepulciano wines.
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Resilience and Trauma among Patients with Parkinson’s Disease during the COVID-19 Pandemic
Roberto Erro,Sofia Cuoco,Emanuele Nigro,Raffaele Ragone,Paolo Barone 대한파킨슨병및이상운동질환학회 2022 Journal Of Movement Disorders Vol.15 No.1
Beyond the direct consequences of the infection, the pandemic has led to a significant amount of stress among the general population for several reasons, including unclear information about the infection from the media, the shortage of medical resources and protective supplies, lockdown restrictions, and more generally, the socioeconomic consequences of the pandemic. Among other vulnerable individuals, PD patients have experienced severe psychological impacts due to COVID-19.
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Soubeyrand-Lenoir, Estelle,Vagner, Christelle,Yoon, Ji Woong,Bazin, Philippe,Ragon, Florence,Hwang, Young Kyu,Serre, Christian,Chang, Jong-San,Llewellyn, Philip L. American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.24
<P>The uptake and adsorption enthalpy of carbon dioxide at 0.2 bar have been studied in three different topical porous MOF samples, HKUST-1, UiO-66(Zr), and MIL-100(Fe), after having been pre-equilibrated under different relative humidities (3, 10, 20, 40%) of water vapor. If in the case of microporous UiO-66, CO<SUB>2</SUB> uptake remained similar whatever the relative humidity, and correlations were difficult for microporous HKUST-1 due to its relative instability toward water vapor. In the case of MIL-100(Fe), a remarkable 5-fold increase in CO<SUB>2</SUB> uptake was observed with increasing RH, up to 105 mg g<SUP>–1</SUP> CO<SUB>2</SUB> at 40% RH, in parallel with a large decrease in enthalpy measured. Cycling measurements show slight differences for the initial three cycles and complete reversibility with further cycles. These results suggest an enhanced solubility of CO<SUB>2</SUB> in the water-filled mesopores of MIL-100(Fe).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2012/jacsat.2012.134.issue-24/ja302787x/production/images/medium/ja-2012-02787x_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja302787x'>ACS Electronic Supporting Info</A></P>
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Moreira, MarianaA.,Santos, Joã,o C.,Ferreira, Alexandre F. P.,Loureiro, José,M.,Ragon, Florence,Horcajada, Patricia,Shim, Kyu-E.,Hwang, Young-K.,Lee, U.-Hwang,Chang, Jong-S.,Serre, Christi American ChemicalSociety 2012 Langmuir Vol.28 No.13
<P>Powder, agglomerates, and tablets of the microporous zirconium(IV)terephthalate metal–organic framework UiO-66 were evaluatedfor the selective adsorption and separation of xylene isomers in theliquid phase using <I>n</I>-heptane as the eluent. Pulseexperiments, performed at 313 K in the presence of <I>n</I>-heptane, revealed the <I>o</I>-xylene preference of thismaterial, which was further confirmed by binary and multicomponentbreakthrough experiments in the presence of <I>m</I>- and <I>p</I>-xylene, resulting in selectivities at 313 K of 1.8 and2.4 with regards to <I>m</I>-xylene and <I>p</I>-xylene, respectively. Additionally, because <I>p</I>-xyleneis the less retained isomer, UiO-66 presents a selectivity patternthat is reverse of that of the xylenes' molecular dimension with respectto shape selectivity. The shaping of the material as tablets did notsignificantly change its selectivity toward the <I>o</I>-xylene isomer or toward <I>p</I>-xylene, which was theless retained isomer, despite a loss in capacity. Finally, the selectivitybehavior of UiO-66 in the liquid <I>n</I>-heptane phasemakes it a suitable material for <I>o</I>-xylene separationin the extract (heavy product) or <I>p</I>-xylene separationin the raffinate (light product) by simulated moving bed technology.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2012/langd5.2012.28.issue-13/la3004118/production/images/medium/la-2012-004118_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la3004118'>ACS Electronic Supporting Info</A></P>
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