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175 results on '"Cavallari C"'

1. Structure and dynamics of the fullerene polymer Li4 C60 studied with neutron scattering

Author

Rols, S., Pontiroli, D., Cavallari, C., Gaboardi, M., Aramini, M., Richard, D., Johnson, M. R., Zanotti, J. -M., Suard, E., Maccarini, M., and Ricco, M.

Subjects
Condensed Matter - Materials Science
Abstract

The two-dimensional polymer structure and lattice dynamics of the superionic conductor Li4 C60 are investigated by neutron diffraction and spectroscopy. The peculiar bonding architecture of this compound is definitely confirmed through the precise localisation of the carbon atoms involved in the intermolecular bonds. The spectral features of this phase are revealed through ab-initio lattice dynamics calculations and inelastic neutron scattering experiments. The neutron observables are found to be in very good agreement with the simulations which predict a partial charge transfer from the Li atoms to the C60 cage. The absence of a well defined band associated to one category of the Li atoms in the experimental spectrum suggests that this species is not ordered even at the lowest temperatures. The calculations predict an unstable Li sublattice at a temperature of 200 K, that we relate to the large ionic diffusivity of this system. This specificity is discussed in terms of coupling between the low frequency optic modes of the Li ions to the soft structure of the polymer., Comment: 29 pages, 13 Figures

Published
2015

13. Magma properties at deep Earth’s conditions from electronic structure of silica

Author

Petitgirard, S, Sahle, C, Weis, C, Gilmore, K, Spiekermann, G, Tse, J, Wilke, M, Cavallari, C, Cerantola, V, Sternemann, C, S. Petitgirard, C. J. Sahle, C. Weis, K. Gilmore, G. Spiekermann, J. S. Tse, M. Wilke, C. Cavallari, V. Cerantola, C. Sternemann, Petitgirard, S, Sahle, C, Weis, C, Gilmore, K, Spiekermann, G, Tse, J, Wilke, M, Cavallari, C, Cerantola, V, Sternemann, C, S. Petitgirard, C. J. Sahle, C. Weis, K. Gilmore, G. Spiekermann, J. S. Tse, M. Wilke, C. Cavallari, V. Cerantola, and C. Sternemann

Abstract

SiO2 is the main component of silicate melts and thus controls their network structure and physical properties. The compressibility and viscosities of melts at depth are governed by their short range atomic and electronic structure. We measured the O K-edge and the Si L2,3-edge in silica up to 110 GPa using X-ray Raman scattering spectroscopy, and found a striking match to calculated spectra based on structures from molecular dynamic simulations. Between 20 and 27 GPa, [4]Si species are converted into a mixture of [5]Si and [6]Si species and between 60 and 70 GPa, [6]Si becomes dominant at the expense of [5]Si with no further increase up to at least 110 GPa. Coordination higher than 6 is only reached beyond 140 GPa, corroborating results from Brillouin scattering. Network modifying elements in silicate melts may shift this change in coordination to lower pressures and thus magmas could be denser than residual solids at the depth of the core-mantle boundary.

Published
2019

14. Identification of a seed maturation protein gene from Coffea arabica (CaSMP) and analysis of its promoter activity in tomato

Author

QUINTERO, F. O. C., PINTO, L. G., BARSALOBRES-CAVALLARI, C. F., ARCURI, M. de L. C., PINO, L. E., PERES, L. E. P., MALUF, M. P., MAIA, I. G., Fabíola O. Campo Quintero, Department of Genetics/Institute of Biosciences/Sao Paulo State University - UNESP, Layra G. Pinto, Department of Genetics/Institute of Biosciences/São Paulo State University - UNESP, Carla F. Barsalobres-Cavallari, Department of Genetics/Institute of Biosciences/São Paulo State University - UNESP, Mariana de Lara Campos Arcuri, Department of Genetics/Institute of Biosciences/São Paulo State University - UNESP, Lilian Ellen Pino, Department of Biological Sciences - LCB/Escola Superior de Agricultura 'Luiz de Queiroz' - ESALQ/University of São Paulo - USP, Lázaro Eustáquio Pereira Peres, Department of Biological Sciences - LCB/Escola Superior de Agricultura 'Luiz de Queiroz' - ESALQ/University of São Paulo - USP, MIRIAN PEREZ MALUF, CNPCa, and Ivan G. Maia, Department of Genetics/Institute of Biosciences/Sao Paulo State University - UNESP.

Subjects
Seed maturation protein, Seed-specific expression, Promoter, Café, Coffee, Tomato
Abstract

In this report, an expressed sequence tag-based approach was used to identify a seed-specific candidate gene for promoter isolation in Coffea arabica. The tissue-specific expression of the cognate gene (CaSMP), which encodes a yet uncharacterized coffee seed maturation protein, was validated by RT-qPCR. Additional expression analysis during coffee fruit development revealed higher levels of CaSMP transcript accumulation in the yellow/green phenological stage. Moreover, CaSMP was preferentially expressed in the endosperm and was down-regulated during water imbibition of the seeds. The presence of regulatory cis-elements known to be involved in seed- and endosperm-specific expression was observed in the CaSMP 5?-upstream region amplified by genome walking (GW). Additional histochemical analysis of transgenic tomato (cv. Micro-Tom) lines harboring the GW-amplified fragment (~ 1.4 kb) fused to uidA reporter gene confirmed promoter activity in the ovule of immature tomato fruits, while no activity was observed in the seeds of ripening fruits and in the other organs/tissues examined. These results indicate that the CaSMP promoter can be used to drive transgene expression in coffee beans and tomato seeds, thus representing a promising biotechnological tool. Made available in DSpace on 2019-10-21T18:04:28Z (GMT). No. of bitstreams: 1 Identificactionofaseedmaturationprotein.pdf: 1721993 bytes, checksum: aef8a71920ca8c5b2d24829ef318ce59 (MD5) Previous issue date: 2018

Published
2018

16. The impact of SARS-CoV-2 pandemic on Oncologic and Degenerative Spine Surgery Department activity: the experience of Rizzoli Orthopaedic Institute under COVID-19 lockdown.

Author

GHERMANDI, R., PIPOLA, V., TERZI, S., TEDESCO, G., CAVALLARI, C., BANDIERA, S., BRÒDANO, G. BARBANTI, EVANGELISTI, G., GIROLAMI, M., and GASBARRINI, A.

Abstract

OBJECTIVE: Experience of Department of Oncologic and Degenerative Spine Surgery of Rizzoli Orthopaedic Institute during SARS-CoV-2 pandemic lockdown. PATIENTS AND METHODS: Retrospective observational study of surgically treated patients from 09th March 2020 to 04th May 2020. Data collected: age, sex, type of disease, neurological status, days of hospitalization, complications and type of discharge. A comparison analysis with same period of the last year was performed in order to evaluate the impact of COVID-19 spreading on daily surgical activity. RESULTS: A total of 107 surgical procedures in 102 patients were performed from 09th March 2020 to 04th May 2020. Analysis showed a statistically significant difference in age, sex, ASIA class and type of treated disease compared to the same period of the last year (p=0.042, 0.006, 0.022 and 0.007, respectively). No statistically significant differences were observed in type of discharge, length of hospitalization and complications (p= 0.447, 0.261 and 0.127, respectively). 3 COVID-19 infections have been identified in hospitalized patients. 1 COVID-19 patient wad admitted from Emergency Department and was managed according to a dedicated path. CONCLUSIONS: Surgical activity was paradoxically increased during SARS-CoV-2 pandemic lockdown through the management of urgent and non-deferrable spinal disease with a low rate (3,9%) of COVID-19 infections. [ABSTRACT FROM AUTHOR]

Published
2020

18. Clinical Role of tinnitus in patients with heart failure

Author

Rinaldi ER, Degli Esposti D, Colombo G, Cavallari C, Campomori F, Kolletzek, COSENTINO, EUGENIO ROBERTO, DORMI, ADA, BACCHELLI, STEFANO, BORGHI, CLAUDIO, Rinaldi ER, Cosentino ER, Dormi A, Degli Esposti D, Colombo G, Cavallari C, Campomori F, Kolletzek, Bacchelli S, and Borghi C

Published
2010

19. Lesion Effects on Cerebellar Peduncles DTI Metrics in MS Patients

Author

Salem Hannoun, Durand-Dubief, F., Ibarrola, D., Cavallari, C., Confavreux, C., Guttmann, C. R. G., Sappey Marinier, D., RMN et optique : De la mesure au biomarqueur, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etude et de Recherche Multimodal Et Pluridisciplinaire en imagerie du vivant (CERMEP - imagerie du vivant), Université de Lyon-Université de Lyon-CHU Grenoble-Hospices Civils de Lyon (HCL)-CHU Saint-Etienne-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Center for Neurological Imaging, and Departments of Radiology and Neurology

Subjects
[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

20. Soft agglomerates of mesalazine multiparticles for colonic delivery in pediatric patients

Author

Balducci, A. G., Colombo, P., Cavallari, C., Rodriguez, L., Sonvico, F., Colombo, Gaia, Rossi, A., BALDUCCI A.G, COLOMBO P, CAVALLARI C, RODRIGUEZ L, SONVICO F, COLOMBO G, and ROSSI A.

Subjects
MESALAZINE, SOFT AGGLOMERATES, CARNAUBA WAX, SPRAY-CONGEALING, MANNITOL/LECITHIN
Abstract

Purpose. Mesalazine is an antinflammatory drug used for ulcerative colites and Crohn’s disease. In pediatrics there is the need to improve the patient compliance avoiding dosage forms that difficult swallowed by young people. The aim of this work was the preparation and characterisation of soft agglomerates of mesalazine multiparticulate systems for colon delivery capable to facilitate the dispersion in water and the intake by children. Methods. Two formulations of mesalazine microparticles, both containing stearic acid and carnauba wax and differing only for the presence of Eudragit L®, were obtained by spray-congealing. “Excipient microparticles” of mannitol/lecithin were prepared by spray-drying. Mesalazine lipid microparticles, non-agglomerating per se, were agglomerated by blending in turbula with mannitolo/lecithin spray-dried microparticles in different ratio (2:1, 4:1, 6:1, 8:1). The agglomerates were characterized by optical microscopy, Scanning Electron Microscopy and X-ray Powder Diffraction. Gastro-resistance and drug release were evaluated by dissolution test at variable pH (HCl 0.1N for 2h and 6h in phosphate buffer pH 7.4). Samples were collected at fixed times and analyzed by UV spectroscopy (λ 301 nm and 330 nm in acidic and alkaline medium, respectively). Results. The surface of lipidic microparticles was smooth and sticky, while the agglomerate morphology appeared rounded. During the tumbling process, the lecithin’s compatibility with the wax material of lipidic microparticles favours the deposition of “excipient microparticles” on the surface. As the ratio of “excipient microparticle” increases the thickness of coating raises. In particular, in the 2:1 ratio more layers of excipient microparticles are deposited on the lipidic microparticles. The dissolution profile showed a drug modified release: in acid medium the formulations are gastroresistant with less of 10% drug release, while in phosphate buffer the mesalazine is released in 4-5 hours. The presence of excipient microparticles reduced the tendency to floatation of lipid microparticles improving their wettability. Conclusion. The agglomeration technology can allow the manufacturing of gastroresistant dosage form suitable for extemporaneous oral use in children. Lipidic microparticles prepared by spray congealing are gastroresistant; their wettability can be increased by agglomeration with mannitol/lecithin microparticles.

Published
2008

22. Lesions effects on cerebellar peduncles DTI metrics in MS patients

Author

Salem Hannoun, Sappey Marinier, D., Durand-Dubief, F., Ibarrola, D., Confavreux, C., Cavallari, C., Cotton, F., Guttmann, C. R. G., RMN et optique : De la mesure au biomarqueur, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etude et de Recherche Multimodal Et Pluridisciplinaire en imagerie du vivant (CERMEP - imagerie du vivant), Université de Lyon-Université de Lyon-CHU Grenoble-Hospices Civils de Lyon (HCL)-CHU Saint-Etienne-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Service de Radiologie, Hospices Civils de Lyon (HCL), Center for Neurological Imaging, and Departments of Radiology and Neurology

Subjects
[SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2013

25. Direct and indirect measurement of magnetocaloric effect in NiCoMnGa alloys

Author

Kamarad J., Fabbrici S., Cavallari C., Solzi M., Albertini F., Arnold Z., and Paoluzi A.

Subjects
NiCoMnGa alloys, Magnetocaloric effect
Abstract

The Co-substitution for Ni in the Mn-rich NiMnGa Heusler alloys changes substantially their structural and magnetic ordering. Temperature of martensitic transitions TM decreases and difference between magnetization of their martensitic and austenitic phases increases with increasing Co-content [1]. These results stimulated us to study magnetocaloric effects (MCE) in the Ni50-xCoxMn25+yGa25-y alloys (x=0;5;7) by the direct adiabatic measurement of dT induced by field 1T and by the indirect determination of MCE from magnetization measurements in fields up to 5T using the Maxwell relation. In comparison with pure stoichiometric alloy Ni2MnGa , dS(TM) = -2.2 J/Kkg, the substantially higher and positive values of dS(TM) were determined for the Co-doped alloys, dS(TM) = +6.7 J/Kkg for x=5 and +9.9 J/Kkg for x=7. The adiabatic dT measurement was used to estimate specific heat of the alloys. The results will be discussed within the basic thermodynamic relations. [1] S.Y. Yu et al., Appl. Phys. Lett. 91, 102507 (2007)

Published
2009

26. Identification of suitable internal control genes for expression studies in Coffea arabica under different experimental conditions

Author

BARSALOBRES-CAVALLARI, C. F., SEVERINO, F. E., MALUF, M. P., MAIA, I. G., CARLA F. BARSALOBRES-CAVALLARI, UNESP, FÁBIO E. SERVERINO, UNESP, MIRIAN PEREZ MALUF, SAPC, and IVAN G. MAIA, UNESP.

Subjects
Coffea Arábica
Abstract

Made available in DSpace on 2011-04-09T22:27:52Z (GMT). No. of bitstreams: 1 Identificationofsuitable.pdf: 389537 bytes, checksum: 6c98179aab7d8f6d2aae441b0678a896 (MD5) Previous issue date: 2011-03-10

Published
2009

38. Role of water on formation and structural features of Maya blue

Author

Mondelli, Claudia, Sánchez del Río, M., González, M. A., Magazzú, A., Cavallari, C., Suárez, Marta, García-Romero, Emilia, Romano, P., Mondelli, Claudia, Sánchez del Río, M., González, M. A., Magazzú, A., Cavallari, C., Suárez, Marta, García-Romero, Emilia, and Romano, P.

Abstract

The Maya blue (MB) is an artificial pigment created between 500-800 A.D. and used in murals, pottery and sculptures by Mayas and other people in Mesoamerica. MB is resistant to age, acid, weathering, biodegradation and even modern chemical solvents, but the chemical reasons behind the resistance to chemical aggressions are still under debate. Water plays a fundamental role in the interactions between indigo and clay. The dynamics of the clay's zeolitic and structural water molecules during the formation of MB, usually stabilized by moderate heating, has been monitored by means of neutron inelastic scattering. Neutron incoherent scattering in these samples is only due to the hydrogen atoms, so the signal is very sensitive to the amount of released water, providing detailed information on the dehydration process. A simultaneous analysis of the coherent elastic scattering and the incoherent scattering allows observing and quantifying how the structure of the clay is affected by dehydration. Here we show that a quite resistant pigment can be obtained at room temperature simply by dehydrating a palygorskite-indigo mixture employing only vacuum, without any thermal treatment.

Published
2012

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