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Accurate measurement of magnesium content in alphaolefins by laser induced breakdown spectroscopy(LIBS) technique

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Optoelectronics Letters 2007年第3期3卷 222-226页

作者： U.Visentini G. Cristoforetti S. Legnaioli A. Salvetti E. Tognoni V. Palleschi Basell R&D Polymer Physics and CharacterizationPiazzale Donegani12 QCL 44100 FerraraItaly Applied Laser Spectroscopy Laboratory Istituto per i Processi Chimico-FisiciArea di Ricerca del Consiglio Nazionale delle RicercheVia Moruzzi 156124 PisaItaly

In this paper, results are presented on first application of laser-induced breakdown spectroscopy （LIBS） technique for quantitative determination of Mg concentration in alpha-olefins. It is demonstrated that this technique gives accuracies in Mg concentrations which are comparable with those of traditional methods, as ICP-OES, in short times and without need for sample preparation. Limits of detection for Mg of the order of 500 ppb are demonstrated. Moreover, a brief discussion about the realization of orooer calibration curves and the definition of the limit of detection （LOD） is reoorted.

关键词： α-石蜡镁含量精确测量激光诱导击穿光谱

HOW TO IMPROVE QUARTET ESTIMATES:A SIMPLE STRATEGY

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HOW TO IMPROVE QUARTET ESTIMATES:A SIMPLE STRATEGY

Sixteenth Congress of the International Union of Crystallography

作者： C.Giacovazzo M.C.Burla Istituto di ricerca per lo sviluppo di Metodologie Cristallografiche CNRc/o Dipartimento GeomineralogicoUniversita' di Bari70124 BariItaly

＜正＞In some recent papers new attention has been devoted to the role of the quartet invariants in the phasing *** main drawbacks of their use are:the strong correlation with triplet invariants and the relative weakn...

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国际抗癌药物学术讨论会论文介绍

中华医学杂志 1981年第4期61卷 244-246页

作者： F.B.Nicolis 刘昌孝(译) 徐煜庭(校) A.M.Casazza F.Arcamone G.Beretta Farmitalia Carlo Erba Experimental Oncology Dept. Farmitalia Carlo Erba ricerca and sviluppo chimico Farm3italia 3Carlo Erba Medical Oncology Dept. San Carlo Borromeo Hospital

1980年5月在我国举行了一次国际抗癌药物学术讨论会。会上国外报告论文14篇,国内报告14篇。国内论文已在国内刊物上发表,不一一摘要介绍了。这14篇论文的题目是:海南粗低抗肿瘤成分的研究(中国医学科学院药物研究所);加利利链霉菌思文...

1980年5月在我国举行了一次国际抗癌药物学术讨论会。会上国外报告论文14篇,国内报告14篇。国内论文已在国内刊物上发表,不一一摘要介绍了。这14篇论文的题目是:海南粗低抗肿瘤成分的研究(中国医学科学院药物研究所);加利利链霉菌思文变种产生的抗肿瘤抗生素(倪关林等);平阳霉素的药理研究(曾永苏等);10一羟基喜树碱对小鼠肝癌和肝组织CAMP和CGMP水平的影响(杨金龙等);可移植性小鼠白血病模型L7712的实验研究(郑升等);甲氧芳芥的临床研究m曾一等);平阳霉素的临床研究(叶祝三等);非何杰余氏淋巴瘤的分类(来少章)2 绒癌和恶性葡萄胎的化疗经验(宋鸿创等)2 恶性淋巴癌的合并化疗(周际昌);山油柑碱的药理和第一期临床研究(湖南医药工业研究所);斑整素铀的介绍(王广生)。本刊将陆续把国外的14篇论文作一摘要介绍。

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Contrasting microscopic interactions determine the properties of water/methanol solutions

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Frontiers of physics 2018年第1期13卷 51-56页

作者： Carmelo Corsaro Francesco Mallamace Sebastiano Vasi Sow-Hsin Chen H. Eugene Stanley Domenico Mallamace CNR-IPCF Messina Istituto per i Processi Chimico-Fisici Viale F. Stagno D'Alcontres 37 98158 Messina Italy Dipartimento MIFT Sezione di Fisica Universita di Messina Viale F. Stagno D'Alcontres 31 98166 Messina Italy Department of Nuclear Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA Center for Polymer Studies and Department of Physics Boston University Boston MA 02215 USA Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase - CSGI Via della Lastruccia 3 50019 Sesto Fiorentino Firenze Italy

Herein we study the different microscopic interactions occurring in water/methanol solutions at dif- ferent methanol molar fractions, using NMR spctroscopy. Temperature was found to determine which interaction dominates. It was found that the mixing between water and methanol is non-ideal because of the presence of interactions like hydrophobicity and hydrophilicity. These results indicate that the competition between hydrophilic and hydrophobic interactions is different in different thermal regions, and that the physical properties of the solution are determined by the character of the solution itself, which in turn depends on the mole fraction of methanol and on the temperature.

关键词： aqueous solutions hydrophobicity NMR hydrophilicity

What are the odds?On the determinants of high residential energy expenditure

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能源与人工环境(英文) 2020年第3期1卷 288-295页

作者： Giorgio Besagni Marco Borgarello Power System Development Department Ricerca sul Sistema Energetico-RSE S.p.A.via Rubattino 5420134 MilanoItaly

A precise understanding of the relationships between the household characteristics and the residential energy consumption is needed to support the implementation of effective top-bottom energy strategies and to improve the prediction of forecasting *** paper contributes to the present-day discussion and analyses the build-ing factors,socio-demographic variables and appliances contributing to high-energy expenditures(viz.,electrical energy expenditure,thermal energy expenditure and total energy expenditure)in the Italian *** proposed study builds on an earlier work proposed by the authors,which identified the determinants of the household energy expenditures,based on a nationally representative survey(the“household Budget Survey:mi-crodata for research purposes-2015”performed by the Italian National Institute of Statistics).In particular,the present paper completes and extends the previous research by applying the odds-ratio analysis to the previously identified determinants,in order to identify the factors that led to high electricity consumption(viz.,electrical energy expenditure,thermal energy expenditure and total energy expenditure).In conclusion,this paper aims to providing a more precise understanding of the factors that certainly affect the energy expenditure.

关键词： Energy expenditure Residential sector Odd-ratio Household variables Determinants

NMR investigation of degradation processes of ancient and modern paper at different hydration levels

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Frontiers of physics 2018年第1期13卷 41-50页

作者： Domenico Mallamace Sebastiano Vasi Mauro Missori Francesco Mallamace Carmelo Corsaro Consorzio interuniversitario per lo sviluppo dei Sistemi a Grande Interfase - CSGI Via della Lastruccia 3 50019 Sesto Fiorentino Firenze Italy Dipartimento MIFT Sezione di Fisica Universita di Messina Viale F. Stagno D'Alcontres 31 98166 Messina Italy Istituto dei Sistemi Complessi Consiglio Nazionale delle Ricerche Unit Sapienza Piazzale Aldo Moro 5 00185 Roma Italy CNR-IPCF Messina Istituto per i Processi Chimico-Fisici Viale F. Stagno D'Alcontres 37 98158 Messina Italy Center for Polymer Studies and Department of Physics Boston University Boston MA 02215 USA

The degradation process of cellulose-made materials was investigated by means of nuclear magnetic resonance （NMR） spectroscopy, with particular emphasis on the role of water and on the hydration mechanism of cellulose fibrils. To accomplish this, the structure and dynamics of water within ancient and modern samples with different aging histories were investigated. The results mainly indicated that hydrolytic and oxidative reactions provoked the formation of acidic by-products. Furthermore, degradation processes were enhanced by higher amounts of water giving a progressive consumption of the amorphous regions of the cellulose. We propose NMR experiments as a benchmark for character- ization of the degradation state of paper, as well as for investigating the effectiveness of restoration treatments.

关键词： ancient paper degradation NMR hydration solvent dynamics

Post-synthesis phase and shape evolution of CsPbBr3 colloidal nanocrystals: The role of ligands

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Nano Research 2019年第5期12卷 1155-1166页

作者： Elisabetta Fanizza Francesca Cascella Davide Altamura Cinzia Giannini Annamaria Panniello Leonardo Triggiani Francesca Panzarea Nicoletta Depalo Roberto Grisorio Gian Paolo Suranna Angela Agostiano M.Lucia Curri Marinella Striccoli Dipartimento di Chimica Università degli Studi di Bari "A.Moro"Via Orabona 470126 BariItaly CNR-Istituto per i Processi chimico Fisici S.S.BariVia Orabona470126 BariItaly CNR-Istituto di Cristallografia Via Amendola122/O70126 BariItaly yDipartimento di Ingegneria Civile Ambientaledel TerritorioEdile e di Chimica(DICATECh)Politecnico di BariVia Orabona 470125Italy CNR-NANOTEC-Istituto di Nanotecnologia Via Monteroni 73100 LecceItaly

The surface chemistry of colloidal cesium lead bromide (CsPbBr3) nanocrystals is decisive in determining the stability and the final morphology of this class of materials,characterized by ionic structure and a high defect tolerance ***,the high sensitivity of purified colloidal nanocubes of CsPbBr3 to diverse environmental condition (solvent dilution,ageing,ligands post synthetic treatment) in ambient atmosphere is investigated by means of a comprehensive morphological (electron microscopy),structural (θ/2θ X-ray diffraction (XRD) and grazing incidence wide angle scattering (GIWAXS)),and spectroscopic chemical (1H nuclear magnetic resonance (NMR),nuclear Overhauser effect spectroscopy (NOESY),absorption and emission spectroscopy) *** aging and solvent dilution contribute to modify the nanocrystal morphology,due to a modification of the ligand ***,we establish the ability of aliphatic carboxylic acids and aikyl amines ligands to induce,even in a post preparative process at room temperature,structural,morphological and spectroscopic *** post synthesis alkyl amine addition,in particular of oleyl amine and octyl amine,the highly green emitting CsPbBr3 nanocubes effectively tum into one-dimensional (1 D) thin tetragonal nanowires or lead halide deficient rhombohedral zero-dimensional (0D) Cs4PbBr6 structures with a complete loss of *** addition of an alkyl carboxylic acid,as oleic and nonanoic acid,produces the transformation of nanocubes into still emitting orthorombic two-dimensional (2D) *** acid/base equilibrium between the native and added ligands,the edsorbed/free ligands dynamic in solution and the ligand solubility in non-polar solvent contribute to render CsPbBr3 particularly sensitive to environmental and processing conditions and,therefore prone to undergo to structural,morphological and,hence spectroscopic,transformations.

关键词： lead halide perovskite nanocrystals surface chemistry ligands equilibria long term stability

Integrin-targeting with peptide-bioconjugated semiconductor-magnetic nanocrystalline heterostructures

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Nano Research 2016年第3期9卷 644-662页

作者： Gianpiero Valente Nicoletta Depalo Ivan de Paola Rosa Maria lacobazzi Nunzio Denora Valentino Laquintana Roberto Comparelli Emiliano Altamura Tiziana Latronico Michele Altomare Elisabetta Fanizza Marinella Striccoli Angela Agostiano Michele Saviano Annarita Del Gatto Laura Zaccaro Maria Lucia Curri Universita degli Studi di Bari Aldo Moro Dipartimento di Chimica Via Orabona 4 70125 - Bari Italy Istituto per i Processi chimico-Fisici-CNR UOS Bari Via Orabona 4 70125 - Bari Italy Istituto di Biostrutture e Bioimmagini-CNR Via Mezzocannone 16 80134 - Napoli Italy Universita degli Studi di Bari Aldo Moro Dipartimento di Farmacia - Scienze del Farmaco Via Orabona 4 70125 - Bari Italy Universita degli Studi di BariAIdo Moro Dipartimento di Bioscienze Biotecnologie e Biofarmaceutica Via Orabona 4 70125 - Bari Italy lstituto di Cristallografia-CNR Via Amendola 122/0 70126 Bari Italy

Binary asymmetric nanocrystals （BNCs）, composed of a photoactive TiO2 nanorod joined with a superparamagnetic γ-Fe203 spherical domain, were embedded in polyethylene glycol modified phospholipid micelle and successfully bioconjugated to a suitably designed peptide containing an RGD motif. BNCs represent a relevant multifunctional nanomaterial, owing to the coexistence of two distinct domains in one particle, characterized by high photoactivity and magnetic properties, that is particularly suited for use as a phototherapy and hyperthermia agent as well as a magnetic probe in biological imaging. We selected the RGD motif in order to target integrin expressed on activated endothelial cells and several types of cancer cells. The prepared RGD-peptide/BNC conjugates, comprehensively monitored by using complementary optical and structural techniques, demon- strated a high stability and uniform dispersibility in biological media. The cytotoxicity of the RGD-peptide/BNC conjugates was studied in vitro. The cellular uptake of RGD-peptide conjugates in the cells, assessed by means of two distinct approaches, namely confocal microscopy analysis and emission spectroscopy determination in cell lysates, displayed selectivity of the RGD-peptide-BNC conjugate for the cw]33 integrin. These RGD-peptide-BNC conjugates have a high potential for theranostic treatment of cancer.

关键词： nanocrystallineheterostructures photoactive semiconductor magnetic nanostructure cyclic RGD peptide αvβ3 integrin active targeting

Au,Pd and maghemite nanofunctionalized hydroxyapatite scaffolds for bone regeneration

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Regenerative Biomaterials 2020年第5期7卷 461-469页

作者： Giovanna Calabrese Salvatore Petralia Claudia Fabbi Stefano Forte Domenico Franco Salvatore Guglielmino Emanuela Esposito Salvatore Cuzzocrea Francesco Traina Sabrina Conoci Department of Chemistry Biology Pharmacy and Environmental Science University of MessinaPiazza Pugliatti198122 MessinaSiciliaItaly Research and Development Applied Chemical WorksPaternoCataniaItaly Department of Chemical Science Fin-Ceramica FaenzaVia Granarolo 177/3Faenza 48018Italy Istituto Oncologico del Mediterraneo ricerca ViagrandeCatania 95029Italy Dipartimento Biomorf Universita degli Studi di MessinaMessinaItaly Rizzoli Orthopedic Institute IRCSSBolognaItaly Distretto Tecnologico Micro e Nano Sistemi Sicilia CataniaItaly

Nanotechnology plays a key role in the development of innovative scaffolds for bone tissue engineering(BTE)allowing the incorporation of nanomaterials able to improve cell proliferation and *** this study,Mg-HA-Coll type I scaffolds(Mg-HA-based scaffolds)were nanofunctionalized with gold nanorods(Au NRs),palladium nanoparticles(Pd NPs)and maghemite nanoparticles(MAG NPs).Nanofunctionalized Mg-HA-based scaffolds(NF-HA-Ss)were tested for their ability to promote both the proliferation and the differentiation of adipose-derived mesenchymal stem cells(hADSCs).Results clearly highlight that MAG nanofunctionalization substantially improves cell proliferation up to 70% compared with the control(Mg-HA-based scaffold),whereas both Au NRs and Pd NPs nanofunctionalization induce a cell growth inhibition of 94% and 89%,*** evidences were found for the osteoinductive properties showing relevant calcium deposits(25% higher than the control)for MAG nanofunctionalization,while a decreasing of cell differentiation(20% lower than the control)for both Au NRs and Pd NPs *** results are in agreement with previous studies that found cytotoxic effects for both Pd NPs and Au *** excellent improvement of both osteoconductivity and osteoinductivity of the MAG NF-HA-S could be attributed to the high intrinsic magnetic field of superparamagnetic MAG *** findings may pave the way for the development of innovative nanostructured scaffolds for BTE.

关键词： bone regeneration hydroxyapatite scaffold tissue engineering gold nanoroads Pd nanoparticles maghemite nanoparticles