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Theresa Hague Andrea Petroczi Paul LR Andrews James Barker Declan P Naughton 《Chemistry Central journal》2010,4(1):2
This is a correction to the following paper: Hague T, Petroczi A, Andrews PR, Barker J, Naughton DP: Determination of metal
ion content of beverages and estimation of target hazard quotients: a comparative study. Chem Central J 2008, 2:13. 相似文献
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Domiziano Mostacci Vincenzo Molinari Francesco Pizzio 《Central European Journal of Physics》2010,8(5):709-716
Bohm’s interpretation of Quantum Mechanics leads to the derivation of a Quantum Kinetic Equation (QKE): in the present work,
propagation of waves in charged quantum gases is investigated starting from this QKE. Dispersion relations are derived for
fully and weakly degenerate fermions and bosons (for the latter above critical temperature) and the differences discussed.
Use of a kinetic equation permits investigation of “Landau-type” damping: it is found that the presence of damping in fermion
gases is dependent upon the degree of degeneracy, whereas it is always present in boson gases. In fully degenerate fermions
a phenomenon appears that is akin to the “zero sound” propagation. 相似文献
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Theresa Hague Andrea Petroczi Paul LR Andrews James Barker Declan P Naughton 《Chemistry Central journal》2008,2(1):13
Background
Considerable research has been directed towards the roles of metal ions in nutrition with metal ion toxicity attracting particular attention. The aim of this study is to measure the levels of metal ions found in selected beverages (red wine, stout and apple juice) and to determine their potential detrimental effects via calculation of the Target Hazard Quotients (THQ) for 250 mL daily consumption. 相似文献6.
Osorio-Vargas PA Pulgarin C Sienkiewicz A Pizzio LR Blanco MN Torres-Palma RA Pétrier C Rengifo-Herrera JA 《Ultrasonics sonochemistry》2012,19(3):383-386
Low-frequency ultrasound (LFUS) irradiation induces morphological, optical and surface changes in the commercial nano-TiO2-based photocatalyst, Evonik-Degussa P-25. Low-temperature electron spin resonance (ESR) measurements performed on this material provided the first experimental evidence for the formation of oxygen vacancies (Vo), which were also found responsible for the visible-light absorption. The Vo surface defects might result from high-speed inter-particle collisions and shock waves generated by LFUS sonication impacting the TiO2 particles. This is in contrast to a number of well-established technologies, where the formation of oxygen vacancies on the TiO2 surface often requires harsh technological conditions and complicated procedures, such as annealing at high temperatures, radio-frequency-induced plasma or ion sputtering.Thus, this study reports for the first time the preparation of visible-light responsive TiO2-based photocatalysts by using a simple LFUS-based approach to induce oxygen vacancies at the nano-TiO2 surface. These findings might open new avenues for synthesis of novel nano-TiO2-based photocatalysts capable of destroying water or airborne pollutants and microorganisms under visible light illumination. 相似文献
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Alexis A. Sosa Toa S. Rivera Mirta N. Blanco Luis R. Pizzio Gustavo P. Romanelli 《Phosphorus, sulfur, and silicon and the related elements》2013,188(8):1071-1079
Abstract A green, simple, and fast procedure has been developed for the preparation of quinoxaline derivatives by a condensation of 1,2-diamines with 1,2-dicarbonyl compounds in the presence of zirconium oxide modified with tungstophosphoric acid (H3PW12O40) as a heterogeneous catalyst, in a solvent-free medium using conventional heating. Quinoxaline derivatives were formed in short-time periods and excellent yields (65–100%). The reaction work-up is very simple and the catalyst can be easily separated from the reaction mixture and reused several times in subsequent reactions without appreciable loss of the catalytic activity. Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfer, and Silicon and the Related Elements for the following free supplemental files: Additional text. 相似文献
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One of the outcomes of nuclear reactions is that reaction products have at birth distribution functions far from Maxwellian. What role do those distribution functions play in the evolution of the entropy of the system? The purpose of this work is to show the effect of the distribution functions of reactant and reaction products on the entropy of a system undergoing DD nuclear fusion reactions. This analysis is conducted with the help of the H-theorem, in the framework of kinetic theory. It will be found that at the onset of this reaction, generalized system entropy decreases markedly. 相似文献
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Marianela G. Pizzio Dr. Ernesto G. Mata Dr. Philippe Dauban Dr. Tanguy Saget 《European journal of organic chemistry》2023,26(37):e202300616
Herein, we report a photocatalytic strategy for the C−H functionalization of saturated azaheterocycles under mild conditions with only one equivalent of starting material. Our strategy is based on a redox active benzamide protecting group that is activated via a halogen-atom transfer (XAT) process to trigger the formation of an α-amino radical. This nucleophilic radical intermediate was then engaged in Giese additions and radical cross couplings to afford C−H alkylated and arylated products. 相似文献