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Molecular and heterogenized dinuclear Ir-Cp^* water oxidation catalysts bearing EDTA or EDTMP as bridging and anchoring ligands

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Science Bulletin 2020年第19期65卷 1614-1625,M0003页

作者： Chiara Domestici leonardo tensi Francesco Zaccaria Nade Kissimina Massimiliano Valentini Roberto D'Amato Ferdinando Costantino Cristiano Zuccaccia Alceo Macchioni Department of Chemistry Biology and BiotechnologyUniversity of Perugia and CIRCCPerugia 06123Italy école Supérieure d'Ingénieurs de Rennes University of Rennes 1Rennes 35042France Department of Chemistry Sultan Qaboos UniversityMuscat 123Oman

The development of efficient water oxidation catalysts(WOCs)is of key importance in order to drive sustainable reductive processes aimed at producing renewable ***,two novel dinuclear complexes,[(Cp^*Ir)2(μ-κ^3-O,N,O-H4-EDTMP)](Ir-H4-EDTMP,H4-EDTMP^4-=ethylenediamine tetra(methylene phosphonate))and[(Cp^*Ir)2(μ-κ^3-O,N,O-EDTA)](Ir-EDTA,EDTA^4-=ethylenediaminetetraacetate),were synthesized and completely characterized in solution,by multinuclear and multidimensional NMR spectroscopy,and in the solid state,by single crystal X-Ray *** were supported onto rutile TiO2 nanocrystals obtaining Ir-H4-EDTMP@TiO2 and Ir-EDTA@TiO2 hybrid *** molecular complexes and hybrid materials were found to be efficient catalysts for WO driven by NaIO4,providing almost quantitative yields,and TON values only limited by the amount of NaIO4 *** for the molecular catalysts,Ir-H4-EDTMP(TOF up to 184 min^-1)exhibited much higher activity than Ir-EDTA(TOF up to 19 min^-1),likely owing to the higher propensity of the former to generate a coordination vacancy through the dissociation of a Ir–OP bond(2.123A,significantly longer than Ir–OC,2.0913A),which is a necessary step to activate these saturated ***-H4-EDTMP@TiO2(up to 33 min^-1)and IrEDTA@TiO2(up to 41 min^-1)hybrid materials showed similar activity that was only marginally reduced in the second and third catalytic runs carried out after having separated the supernatant,which did not show any sign of activity,*** observed TOF values for hybrid materials are higher than those reported for analogous systems deriving from heterogenized mononuclear *** suggests that supporting dinuclear molecular precursors could be a successful strategy to obtain efficient heterogenized water oxidation catalysts.

关键词： Renewable fuels Water oxidation Homogeneous catalysis Heterogenized catalysts Organometallic chemistry Dinuclear complexes

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Role of copper chelating agents: between old applications and new perspectives in neuroscience

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Neural Regeneration Research 2025年第3期20卷 751-762页

作者： Rosalba Leuci leonardo Brunetti Vincenzo Tufarelli Marco Cerini Marco Paparella Nikola Puvača Luca Piemontese Department of Pharmacy-Pharmaceutical Science University of Bari Aldo MoroBariItaly Department of Precision and Regenerative Medicine and Jonian Area(DiMePRe-J) Section of Veterinary Science and Animal ProductionUniversity of Bari Aldo MoroBariItaly Department of Engineering Management in Biotechnology Faculty of Economics and Engineering Management in Novi SadUniversity Business Academy in Novi SadNovi SadSerbia

The role of copper element has been an increasingly relevant topic in recent years in the fields of human and animal health, for both the study of new drugs and innovative food and feed supplements. This metal plays an important role in the central nervous system, where it is associated with glutamatergic signaling, and it is widely involved in inflammatory processes. Thus, diseases involving copper(Ⅱ) dyshomeostasis often have neurological symptoms, as exemplified by Alzheimer's and other diseases(such as Parkinson's and Wilson's diseases). Moreover, imbalanced copper ion concentrations have also been associated with diabetes and certain types of cancer, including glioma. In this paper, we propose a comprehensive overview of recent results that show the importance of these metal ions in several pathologies, mainly Alzheimer's disease, through the lens of the development and use of copper chelators as research compounds and potential therapeutics if included in multi-target hybrid drugs. Seeing how copper homeostasis is important for the well-being of animals as well as humans, we shortly describe the state of the art regarding the effects of copper and its chelators in agriculture, livestock rearing, and aquaculture, as ingredients for the formulation of feed supplements as well as to prevent the effects of pollution on animal productions.

关键词： agriculture Alzheimer's disease chelators copper feed supplements multi-target

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Dendritic spine degeneration:a primary mechanism in the aging process

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Neural Regeneration Research 2025年第6期20卷 1696-1698页

作者： Gonzalo Flores leonardo Aguilar-Hernández Fernado García-Dolores Humberto Nicolini Andrea Judith Vázquez-Hernández Hiram Tendilla-Beltrán Instituto de Fisiología Benemérita Universidad Autónoma de Puebla(BUAP)PueblaMexico Instituto de Ciencias Forenses(INCIFO) Tribunal Superior de Justicia de la Ciudad de México(TSJCDMX).Mexico CityMexico Instituto Nacional de Medicina Genómica(INMEGEN) Mexico CityMexico

Recent reports suggest that aging is not solely a physiological process in living beings;instead, it should be considered a pathological process or disease(Amorim et al., 2022). Consequently, this process involves a wide range of factors, spanning from genetic to environmental factors, and even includes the gut microbiome(GM)(Mayer et al., 2022). All these processes coincide at some point in the inflammatory process, oxidative stress, and apoptosis, at different degrees in various organs and systems that constitute a living organism(Mayer et al., 2022;AguilarHernández et al., 2023).

关键词： aging process stress

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Iterative Learning Control for homing guidance design of missiles

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Defence Technology（防务技术） 2017年第5期13卷 360-366页

作者： leonardo Acho Escola d'Enginyeria de Barcelona Est-EEBE Universitat Politecnica de Catalunya-UPCSpain

This paper presents an Iterative Learning Control design applied to homing guidance of missiles against maneuvering targets. According to numerical experiments, although an increase of the control energies is appreciated with respect to a previous published base controller for comparison, this strategy, which is simple to realize, is able to reduce the time to reach the head-on condition to target destruction. This fact is important to minimize the missile lateral force-level to fulfill engaging in hyper-sonic target persecutions.

关键词： Terminal guidance law Missiles Iterative learning control

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CHARACTERISATION OF RATIONAL AND NURBS DEVELOPABLE SURFACES IN COMPUTER AIDED DESIGN

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Journal of Computational Mathematics 2021年第4期39卷 556-573页

作者： leonardo Fernandez-Jambrina ETSI Navales Universidad Politecnica de Madrid28040-MadridSpain

In this paper we provide a characterisation of rational developable surfaces in terms of the blossoms of the bounding curves and three rational functions∧,M,ν.Properties of developable surfaces are revised in this *** particular,a closed algebraic formula for the edge of regression of the surface is obtained in terms of the functions∧,M,ν,which are closely related to the ones that appear in the standard decomposition of the derivative of the parametrisation of one of the bounding curves in terms of the director vector of the rulings and its *** is also shown that all rational developable surfaces can be described as the set of developable surfaces which can be constructed with a constant∧,M,ν.The results are readily extended to rational spline developable surfaces.

关键词： NURBS Bezier Rational Spline NURBS Developable surfaces

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Early Permian arc-related volcanism and sedimentation at the western margin of Gondwana： Insight from the Choiyoi Group lower section

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Geoscience Frontiers 2016年第5期7卷 715-731页

作者： leonardo Strazzere Daniel A.Gregori leonardo Benedini CONICET and Catedra de Ceologia Argentina Departamento de Geologia Universidad Nacional del Sur San Juan 670 8000 Bahia Blanca Argentina

Permian sedimentary and basic to intermediate volcanic rocks assigned to the Conglomerado del Río Blanco and Portezuelo del Cenizo Formation, lower part of the Choiyoi Group, crop out between the Cordon del Plata, Cordillera Frontal and Precordillera of Mendoza Province, Argentina. The sedimentary rocks are represented by six lithofacies grouped in three facies associations. They were deposited by mantled and gravitational flows modified by high-energy fluvial currents that evolved to low-energy fluvial and lacustrine environments. They constitute the Conglomerado del Río Blanco, which cover unconformably marine Carboniferous sequences. Five volcanic and volcaniclastic facies make up the beginning of volcanic activity. The first volcanic event in the Portezuelo del Cenizo is basaltic to andesitic lava-flows emplaced in the flanks of volcanoes. Lava collapse produced thick block and ash *** in the intermediate volcanic rocks, there are dacites of different geochemical signature,which indicate that the development of acidic volcanism was coetaneous with the first volcanic *** geochemistry of these rocks induces to consider that the Choiyoi Group Lower section belongs to a magmatic arc on continental crust. The age of this section is assigned to the lower Permian（277 ？ 3.0Ma, Kungurian age）.

关键词： Choiyoi group lower section Conglomerado del Río Blanco Cordillera Frontal Argentina

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Modeling the effect of sediment concentration on the flow-like behavior of natural debris flow

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International Journal of Sediment Research 2020年第4期35卷 315-327页

作者： leonardo Schippa Department of Engineering University of Ferrara 1 Via Saragat

The rheological behavior of natural slurries consisting of fine-grained,reconstituted debris-flow deposits on pyroclastic terrains having different solid concentrations(ranging from 30 to 42%) has been investigated using a rotational rheometer equipped with a vane rotor *** were done by increasing the applied shear stress step by step;then a decreasing stress ramp was applied following the same shear stress *** slurry mixtures exhibit a typical yield-stress fluid behavior with a static yield stress larger than the dynamic yield *** the range of the shear rate corresponding to the flowlike behavior the slurry mixtures behave as a dilatant fluid at lower grain concentrations and as a pseudoplastic fluid in correspondence with the higher grain content,showing a strong discrepancy from the Bingham *** rheological behavior is better interpreted by a Herschel-Bulkley model,whose rheological parameters strongly depend on the granular ***,a generalized Herschel-Bulkley model accounting for the bulk sediment concentration effect is *** rheological behavior of natural slurries consisting of fine-grained, reconstituted debris-flow deposits on pyroclastic terrains having different solid concentrations(ranging from 30 to 42%) has been inves?tigated using a rotational rheometer equipped with a vane rotor system. Experiments were done by increasing the applied shear stress step by step; then a decreasing stress ramp was applied following the same shear stress levels. The slurry mixtures exhibit a typical yield-stress fluid behavior with a static yield stress larger than the dynamic yield stress. In the range of the shear rate corresponding to the flow?like behavior the slurry mixtures behave as a dilatant fluid at lower grain concentrations and as a pseudoplastic fluid in correspondence with the higher grain content, showing a strong discrepancy from the Bingham idealization. The rheological behavior is better i

关键词： Debris flow Rheology Grain concentration Herschel-Bulkley model

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SARS-CoV-2 spike protein:flexibility as a new target for fighting infection

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Signal Transduction and Targeted Therapy 2020年第1期5卷 321-323页

作者： Ciro leonardo Pierri Laboratory of Biochemistry Molecular and Structural BiologyDepartment of BiosciencesBiotechnologiesBiopharmaceuticsUniversity of BariVia E.Orabona470125 BariItaly BROWSer S.r.l.(https://***/)c/o Department of Biosciences BiotechnologiesBiopharmaceuticsUniversity“Aldo Moro”of BariVia E.Orabona470126 BariItaly

The recent study of Turoňováet al.,is the first to combine cryoelectron tomography,subtomogram averaging,and molecular dynamics simulations for analyzing the structure of the SARS-CoV-2 spike protein in situ,1 *** t... 详细信息

关键词： al infection fighting

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Collagen cross-linking:when and how?A review of the state of the art of the technique and new perspectives

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Eye and Vision 2015年第1期2卷 187-196页

作者： leonardo Mastropasqua Ophthalmology Department Policlinico SS Annunziata Center of Excellence and National High-Tech Center (CNAT) in Ophthalmology University "G. d'Annunzio" of Chieti-Pescara Via dei Vestini 31 66100 Chieti Italy.

Since the late 1990s corneal crosslinking(CXL)has been proposed as a new possibility to stop progression of keratoconus or secondary corneal ectasia,with the promising aim to prevent progressive visual loss due to the evolution of the pathology and to delay or avoid invasive surgical procedures such as corneal *** possibility of strengthening corneal tissue by means of a photochemical reaction of corneal collagen by the combined action of Riboflavin and ultraviolet A irradiation(UVA),radically modified the conservative management of progressive corneal *** is a review of the state of the art of CXL,reporting basic and clinical *** paper describes basic principles,advantages and limits of different CXL techniques and possible future evolution of the procedure.

关键词： Keratoconus Ectasia Collagen cross-linking Transepithelial cross-linking Collagen corneal cross-linking epithelium off Collagen corneal cross-linking epithelium on Transepithelial cross-linking with iontophoresis

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New prognostic biomarkers of mortality in patients undergoing liver transplantation for hepatocellular carcinoma

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World Journal of Gastroenterology 2018年第37期24卷 4230-4242页

作者： leonardo Lorente Intensive Care Unit Hospital Universitario de Canarias

The outcome prediction of hepatocellular carcinoma(HCC) patients undergoing liver transplantation(LT) was classically established using various macromorphological factors and serum alpha-fetoprotein levels prior to LT. However, other biomarkers have recently been reported to be associated with the prognosis of HCC patients undergoing to LT. This review summarizes clinical data on these new biomarkers. High blood levels of malondialdehyde, total antioxidant capacity, caspasecleaved cytokeratin-18, soluble CD40 ligand, substance P, C-reactive protein, and vascular endothelial growth factor, increased neutrophil to lymphocyte ratio and platelet to lymphocyte ratio in blood, high peripheral blood expression of human telomerase reverse transcriptase messenger ribonucleic acid, and high HCC expression of dickkopf-1 have recently been associated with decreased survival rates. In addition, high blood levels of des-gamma-carboxy prothrombin, and high HCC expression of glypican-3, E-cadherin and betacatenin have been associated with increased HCC recurrence. Additional research is necessary to establish the prognostic role of these biomarkers in HCC prior to LT. Furthermore, some of these biomarkers are also interesting because their potential modulation could help to create new research lines for improving the outcomes of those patients.

关键词： Liver transplantation Hepatocellular carcinoma Biomarkers Outcome Survival Recurrence Genomic

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