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An in-depth multi-technique characterization of rare earth carbonates-RE_(2)(CO_(3))_(3)·2H_(2)O-owning tengerite-type structure

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Journal of Rare Earths 2022年第8期40卷 1281-1290页

作者： Luca Spiridigliozzi Mauro Bortolotti grazia accardo Alessandro Vergara Domenico Frattini Claudio Ferone Raffaele Cioffi Gianfranco Dell'Agli Department of Civil and Mechanical Engineering University of Cassino and Southern LazioVia G.Di Biasio 4303043Cassino(FR)Italy Department of Industrial Engineering University of TrentoVia Sommarive 938123TrentoItaly Center of Hydrogen-Fuel Cell Research Korea Institute of Science and TechnologyHwarang-ro 14-gilSeongbuk-guSeoul136-791Republic of Korea Centre for Cooperative Research on Alternative Energies(CIC EnergiGUNE) Basque Research and Technology Alliance(BRTA)Alava Technology ParkCalle Albert Einstein 4801510Vitoria-GasteizSpain Department of Chemical Sciences University of Napoli“Federico II”Via Cintia80126NapoliItaly Graduate School of Energy and Environment Seoul National University of Science and TechnologyGongneung-ro 232Nowon-guRepublic of Korea Department of Engineering University of Napoli“Parthenope”Centro DirezionaleIsola C480143Napoli(NA)Italy INSTM-National Interuniversity Consortium of Materials Science and Technology

The present study has been conducted to contribute,once and for all,filling the lack of structural information for the whole class of rare earth(RE)carbonates owning the tengerite-(Y)structure.A complete structural characterization,carried out by Rietveld refinement of X-ray powder diffraction(XRD)data,was comparatively performed for the first time on several hydrated RE carbonates,having the general chemical formula RE_(2)(CO_(3))_(3)·χH_(2)O,RE=Y,Gd,Tb,Dy,Ho and *** samples share the same space group and lattice parameters similar to tengerite-(Y);the structures are also closely related,consisting in all cases of a three-dimensional framework of nine-fold coordinated RE atom polyhedral,linked together by carbonate *** addition to relatively minor changes in fractional coordinates of atom sites and corresponding interatomic distances,the only perceivable difference lies in the lattice parameters affected by the ionic radius of RE^(3+).However,in the case of Er,which has the lowest cationic radius among the analyzed RE,the stabilization of tengerite structure is at its limit condition,because the carbonate groups are heavily ***,FT-IR and Raman spectra confirm the main structural features obtained by Rietveld *** observed morphology of the various samples is almost the same,being characterized by the presence of bidimensional rod-like particles grouped in agglomerates,typical of tengerite crystals,thus indicating that the crystallization mechanism occurring during the hydrothermal synthesis is the same,irrespective of the involved RE cation.

关键词： Rare Earth carbonates Tengerite Structural refinement Hydrothermal treatment

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An innovative trigeneration system using biogas as renewable energy

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Chinese Journal of Chemical Engineering 2018年第5期26卷 1179-1191页

作者： grazia Leonzio Department of Industrial and Information Engineering and Economics University of L'Aquila

One of the ways to decrease the global primary energy consumption and the corresponding greenhouse gas emissions is the application of the combined cooling, heating and power generation technologies, known as trigeneration system. In this research an innovative trigeneration system, composed by an absorption heat pump, a mechanical compression heat pump, a steam plant, and a heat recovery plant is developed. The low tem- perature heat produced by absorption chiller is sent to a mechanical compression heat pump, that receives pro- cess water at low temperature from the heat recovery plant and bring it to higher temperatures. The trigeneration system is fed by biogas, a renewable energy. A design and a simulation of the system are developed by ChemCad 6.3 software. The plant produces 925 kW of electrical energy, 2523 kW of thermal energy and 473 kW of cooling energy, by the combustion of 3280 kW of biogas. Primary energy rate （P.E.R.） is equal 1.04 and a sensitivity analysis is carried out to evaluate the effect of cooling capacity, produced electrical energy and process water temperature. The first has a negative effect, while other parameters have a positive effect on P.E.R. Compared to a cogeneration system, the tdgeneration plant produces the 28% higher of power and the 40% lower of carbon dioxide emissions. An economic analysis shows that the plant is economically feasible only consid- ering economic incentives obtained by the use of heat pumps and steam plant at high efficiency. Saving 6431 t.a-1 corresponding to 658000 EUR.a-1 of incentives, the plant has a net present value （N.P.V.） and a pay back period （P.B.P.） respectively equal to 371000 EUR and 4 year. Future works should optimize the process considering cost and energetic efficiency as the two objective functions.

关键词： Trigeneration system Biogas Energy efficiency Process simulation Heat pumps Environmental analysis

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Mathematical model of absorption and hybrid heat pump

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Chinese Journal of Chemical Engineering 2017年第10期25卷 1492-1504页

作者： grazia Leonzio Department of Industrial and Information Engineering and Economics University of L'Aquila Via Giovanni Gronchi 18 67100 UAquila Italy

Recovering waste heat from industrial processes is bene ficial in order to reduce the primary energy demands and heat pumps can be used to this *** heat pumps are energy-saving and environment-friendly because use working fluids that do not cause ozone depletion and can reduce the global warming *** hybrid heat pump processes combine the conventional vapor-compression and the absorption heat pump *** about the simulations and modeling of hybrid heat pumps are few in *** this research a mathematical model for single effect absorption and hybrid heat pump is carried out with Chem Cad? ***–H_2O is used as working fluid while electrolytic NRTL and electrolytes latent heat are used as thermodynamic model due to the better *** parameters of activity coef ficients are regressed from experimental vapor pressure data while default constants are used for the solubility expressions.A design of heat pumps is developed and a new modeling of generator is *** coef ficient of performance of absorption heat pump and hybrid heat pump is equal to 0.7 and 0.83 *** absorption heat pump a sensitivity analysis is carried out to evaluate the effect of temperature and pressure generator,the concentration of Li–Br solution on coef ficient of performance,cooling capacity and working fluid *** hybrid heat pump,the different coef ficients of performance,the primary energy ratio,the generator heat,and the compressor power are analyzed for different values of compressor *** show that comparing the two systems the hybrid pump allows to save more primary energy,costs and carbon dioxide emissions with respect to absorption heat pump with the increasing of compressor proportion *** researches should focus on the construction of this heat pumps integrated in chemical processes as a biogas plant or trigeneration systems.

关键词： Absorption heat pumps Hybrid heat pumps LiBr–H2O modeling Energy efficiency Process simulation Mathematical model

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Architectural vanguard stone

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Frontiers of Architectural Research 2012年第3期1卷 244-252页

作者： grazia Lombardo Department of Architecture University of Catania Italy

The modern and updated use of traditional materials in the building industry often proves to improve the performance of the buildings through the economy of management, duration, conditions of comfort and safety, appearance and shelf life. Within this problem a search has allowed us to verify a new building procedure based on the use of reinforced masonry with blocks of natural stone and steel bars and mortar. Then a new phase of research has defined the building procedure of prestressed reinforced masonry with dry-assembled blocks of natural stone. This paper reports the results from a test phase of the research relating to the execution of a full-scale prototype of a panel, with a curved shape, called ＂stone sail＂. This testing allows us to verify the real feasibility of the new building procedure.

关键词： Prestressed masonry Natural stone Dry assembted Futt-scate prototype

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Role of pituitary adenylate cyclase-activating polypeptide in peripheral nerve regeneration:a cellular and molecular perspective

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Neural Regeneration Research 2024年第7期19卷 1429-1430页

作者： grazia Maugeri Velia D’Agata Section of Anatomy Histology and Movement SciencesDepartment of Biomedical and Biotechnological SciencesUniversity of CataniaCataniaItaly

Neuro regeneration is a very complex phenomenon characterized by the generation of new neurons and synapses,involving connections between adjacent cells and axonal *** supplies additional longterm resources to replace... 详细信息

关键词： replace functional regeneration

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Restoration of modern buildings

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Frontiers of Architectural Research 2012年第4期1卷 357-364页

作者： grazia Lombardo Department of Architecture University of Catania

The present paper is part of a research that is developed within the sustainable building design through the revisiting of the traditional construction materials. The results obtained show that the natural stone, enhanced by technological innovations, are often capable of providing excellent *** on the tests, it was possible to verify and validate the hypothesis that the proposed new system of external vertical opaque enclosure consisting in a panel in dry-assembled and precompressed blocks of natural stone through reinforcing steel has good performances when used both in the case of new design and in the case of recovery of modern buildings, when the intervention is being addressed within of an overall building improvement regarding the security, sustainability, functionality and *** paper reports the first results obtained by the study of the feasibility of the envelope being tested, through the definition of all the details of links with the existing building structure.

关键词： Pre-compressed stone panel Innovative envelope Energy improvement Feasibility study

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Visual communication in social play of a hierarchical carnivore species:the case of wild spotted hyenas

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Current Zoology 2022年第4期68卷 411-421页

作者： Andrea Paolo Nolfo grazia Casetta Elisabetta Palagi Department of Biology Unit of EthologyUniversity of PisaVia A.Volta 6Pisa56126Italy Natural History Museum University of PisaVia Roma 79CalciPisa56011Italy

Communication relies on signals that can be produced via different sensory modalities to modify receivers’*** social interactions,the possibility to perceive subtle visual cues enhances the use of facial expressions to exchange *** of the most appropriate fields to explore the specific design features of visual signals is play ***,we explored the production and potential role of Relaxed Open Mouth(ROM)and Head Bobbing(HB)in regulating play fighting of wild spotted hyenas Crocuta crocuta,a highly hierarchical carnivore *** accordance with the assumptions of the signal optimization theory,wild hyenas produced ROM and HB almost exclusively when the sender was in direct visual contact with the receiver thus suggesting that senders were attentive to the playmates’*** to HB,the sequential analysis revealed that ROM often anticipated offensive patterns such as play biting thus supporting the hypothesis that ROM,but not HB,is a metacomunicative ***,when the offensive patterns were biased toward one of the 2 players,the session was punctuated by a higher number of *** findings support the general hypothesis that these 2 visual signals can play different roles in the management of play fighting in this carnivore *** complementary use of ROM and HB would suggest that spotted hyenas are highly competent and fast in processing facial displays of different nature to correctly“read others’intentions”and respond with appropriate motor actions to avoid misunderstanding during one of the most multifaceted and risky social interaction.

关键词： Crocuta crocuta head and facial signals head bobbing metacommunication play fighting relaxed open mouth display

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Role of exercise in the brain:focus on oligodendrocytes and remyelination

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Neural Regeneration Research 2023年第12期18卷 2645-2646页

作者： grazia Maugeri Velia D'Agata Giuseppe Musumeci Section of Anatomy Histology and Movement SciencesDepartment of Biomedical and Biotechnological SciencesUniversity of CataniaCataniaItaly Research Center on Motor Activities(CRAM) University of CataniaCataniaItaly Department of Biology Sbarro Institute for Cancer Research and Molecular MedicineCollege of Science and TechnologyTemple UniversityPhiladelphiaPAUSA

The phrase“Mens sana in corpore sano”taken from Juvenal's Satires(127 a.C.)represents one of the best-known and most used sentences of all time,whose meaning in the modern age refers to the importance of physical activity for mental health and *** literature demonstrated the positive role of exercise in counteracting several diseases,such as diabetes,cardiovascular diseases,neurodegenerative diseases,cancers and age-related disorders including muscle atrophy,the reduction of aerobic capacity,bone and cartilage loss.

关键词： meaning such exercise

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Ex vivo models of retinal neurovascular diseases

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Annals of Eye Science 2022年第2期7卷 1-7页

作者： Maria grazia Rossino Department of Biology University of PisaPisaItaly

Background:The ex vivo model represented by mouse retinal explants in culture is a useful experimental model to investigate the molecular mechanism involved in neurovascular diseases such as diabetic retinopathy(DR).It ensures an experimental overview with more complete respect to isolate cells and reduce problems in terms of accessibility and management with respect to in vivo *** particular,it allows the evaluation of the relationship between retinal cells in response to the typical stressors involved in DR ***:Ex vivo retinal fragments derived from 3-to 5-week-old C57BL/6J *** particular,after dissection,the retina is cut into 4 separate fragments and transferred onto inserts placed with ganglion cells *** in culture,the explants could be treated in stress conditions typical of *** particular,this study protocol describes the procedure for the preparation and the culture of retinal explants with specific metabolic stressors such as high glucose(HG),advanced glycation end product(AGE),and oxidative stress(OS).In the end,this paper provides the protocols to perform molecular analyses in order to evaluate the response of retinal explants to stress and/or neuroprotective ***:The cultured retinal explants represent an ex vivo experimental model to investigate the molecular mechanisms involved in neurovascular diseases such as ***,they could be useful to test the effect of neuroprotective compounds in response to metabolic stressors in a fewer time respect to an in vivo *** conclusion,retinal explants in culture represent a valuable experimental model to conduct further studies to better understand the pathophysiology of DR.

关键词： Retinal explants diabetic retinopathy(DR) neurovascular diseases

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Specific contribution of mannose-binding lectin murine isoforms to brain ischemia/reperfusion injury

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Cellular & Molecular Immunology 2020年第3期17卷 218-226页

作者： Laura Neglia Marco Oggioni Domenico Mercurio Maria-grazia De Simoni Stefano Fumagalli1 Istituto di Ricerche Farmacologiche Mario Negri IRCCS Department of NeuroscienceMilanItaly

Mannose-binding lectin(MBL),an initiator of the lectin pathway(LP)of complement activation,is detrimental in ischemic stroke,as shown in clinical studies and rodent *** humans have one functional MBL protein,rodents have two isoforms,MBL-A and MBL-C,whose functions relative to that of human MBL are *** permit the clinical translation of preclinical data,we aimed to define the specific contributions of MBL-A and MBL-C to brain *** subjected mice with double(MBL^(−/−))or single(MBL-A^(−/−)or MBL-C^(−/−))MBL isoform depletion to transient middle cerebral artery occlusion(tMCAo).MBL^(−/−) mice had fewer neurological deficits and smaller ischemic lesions than WT ***-A^(−/−) mice had smaller lesions than WT mice and exhibited no significant behavioral defects,whereas MBL-C^(−/−) mice did not differ from WT *** induction of Mbl1 and Mbl2(the MBL-A and MBL-C genes)expression 48 h after tMCAo was similar across *** time course of Mbl1 and Mbl2 expression in WT ischemic mice showed that Mbl1 activation occurred earlier(24 h)than Mbl2 activation(48 h).The plasma levels of MBL-A and MBL-C in MBL-C^(−/−) and MBL-A^(−/−) mice,respectively,were similar to those in WT mice both at baseline and at 48 h after *** 48 h,MBL-A^(−/−)ischemic mice showed higher MBL-C levels in the brain than WT *** and MBL-C^(−/−) ischemic mice had higher LP activity in plasma and,accordingly,higher levels of C3 deposition in the brain than MBL-A^(−/−) and MBL^(−/−) *** conclusion,mice with depletion of both MBL isoforms exhibited strong protection from ischemia/reperfusion ***-A was the main contributor to injury,likely owing to its earlier activation after ischemia and more efficient activation of the complement system than MBL-C.

关键词： injury depletion likely

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