Výsledky vyhledávání - "Gianfranco Guglielmetti"

Investigation of Asphaltene Chemical Structural Modification Induced by Thermal Treatments

Autor: Silvia Spera, Luciano Santolini, Stefano Chiaberge, Mario Salvalaggio, Pietro Cesti, Luciano Montanari, Gianfranco Guglielmetti

Publikováno v: Energy & Fuels. 23:4486-4495

In the conversion of heavy oil into valuable fuels by thermal processes, one of the main problems is the formation of soft coke-like substances that can cause equipment fouling and catalyst deactivation. Asphaltenes are present in large quantity in h

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https://doi.org/10.1021/ef900206n

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Laser desorption/ionization mass spectrometric study on asphaltenes from different heavy crude oils and products originating from their thermal treatment

Autor: Roberta Seraglia, Anna Smaniotto, Pietro Traldi, Gianfranco Guglielmetti, Luciano Montanari, Cristina Flego

Publikováno v: RCM. Rapid communications in mass spectrometry 23 (2009): 725–728.
info:cnr-pdr/source/autori:Smaniotto, A.; Flego, C.; Montanari, L.; Guglielmetti, G.; Seraglia, R.; Traldi, P./titolo:Laser desorption%2Fionization mass spectrometric study on asphaltenes from different heavy crude oils and products originating from their thermal treatment/doi:/rivista:RCM. Rapid communications in mass spectrometry/anno:2009/pagina_da:725/pagina_a:728/intervallo_pagine:725–728/volume:23

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https://doi.org/10.1002/rcm.3915

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Coordination properties towards palladium(II) of a tridentate dianionic ligand acting as a N- or a N,O-donor

Autor: Gianfranco Guglielmetti, Luca Labella, Fabio Marchetti, Francesco Di Colo, Fausto Calderazzo, Daniela Belli Dell'Amico

Publikováno v: Inorganica Chimica Acta. 359:127-135

The new palladium(II) complex Pd[C5H3N-2,6-(CONPh)2](η1-NCMe) (1), prepared from N,N′-diphenyl-2,6-pyridinedicarboxamide and Pd(OAc)2 in acetonitrile, has been characterized via IR, 1H NMR and single-crystal X-ray diffraction. In this compound the

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https://doi.org/10.1016/j.ica.2005.06.073

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FORMATION OF SULFATE CONJUGATES METABOLITES IN THE DEGRADATION OF PHENANTHRENE, ANTHRACENE, PYRENE AND BENZO[A]PYRENE BY THE ASCOMYCETEASPERGILLUS TERREUS

Autor: Gianfranco Guglielmetti, Guido Capotorti, Pietro Cesti, Antonella Lombardi

Publikováno v: Polycyclic Aromatic Compounds. 25:197-213

The metabolism of four PAHs (phenanthrene, anthracene, pyrene and benzo(a)pyrene) by an Aspergillus terreus strain, isolated from a polluted soil, was investigated in liquid submerged culture. The main metabolites identified by the HPLC-MS technique,

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https://doi.org/10.1080/10406630590950273

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Pyrene and benzo(a)pyrene Metabolism by an Aspergillus Terreus Strain Isolated from a Polycylic Aromatic Hydrocarbons Polluted Soil

Autor: Paolo Digianvincenzo, Guido Capotorti, Antonella Bernardi, Pietro Cesti, Gianfranco Guglielmetti

Publikováno v: Biodegradation. 15:79-85

A strain of Aspergillus terreus was isolated from a polycyclic aromatic hydrocarbons (PAHs) polluted soil. The metabolism of pyrene and benzo(a)pyrene by this fungus was investigated in liquid submerged culture added of 50 and 25 ppm respectively of

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https://doi.org/10.1023/b:biod.0000015612.10481.e6

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Experimental Evidence for the Aggregation of [(Phen)2Pd2(μ-H)(μ-CO)]+ in Solution

Autor: Cecilia Querci, Cristiano Zuccaccia, Gianfranco Guglielmetti, Aldo Romani, Alceo Macchioni

Publikováno v: Organometallics. 22:1526-1533

The aggregation in solution of the dinuclear palladium(I) complex [(Phen) 2 Pd 2 (μ-H)(μ-CO)] + BAr F 4 - (1c) was investigated by PGSE NMR, UV-vis, and ESI- and FAB-mass techniques. PGSE measurements showed that only the cationic moiety of lc (1c

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https://doi.org/10.1021/om0209780

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Synthesis of phosphatidylcholines containing ricinoleic acid

Autor: Silvia Spera, Gianfranco Guglielmetti, Gianpietro Borsotti, Ezio Battistel

Publikováno v: Tetrahedron. 57:10219-10227

1,2-Diricinoleoyl- and 1-ricinoleoyl-2-oleoyl-sn-glycero-3-phosphocholine were synthesised with good yields. The synthesis started with the preparation of ricinoleic acid from castor oil. The choice of a suitable agent to protect the –OH group of r

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https://doi.org/10.1016/s0040-4020(01)01057-2

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Synthesis of 2,3,5-triaryl-4-trifluoromethyl thiophenes

Autor: Gianfranco Guglielmetti, Giovanni Meazza, Giampaolo Zanardi, Paolo Piccardi

Publikováno v: Journal of Fluorine Chemistry. 82:175-180

Triaryl- β -trifluoromethyl thiophenes are synthesized from 1,3-dithiolium-4-olates and various substituted 1-aryl-3,3,3-trifluoro-1-propynes. The spectroscopic characteristics of the products and the regioselectivity of the reaction are discussed.

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https://doi.org/10.1016/s0022-1139(96)03575-0

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Oxidation of isosafrole by sodium hypochlorite catalysed by manganese porphyrins: Unusual competition between epoxidation and O-dealkylation

Autor: Cecilia Querci, Luisella Bocchio Chiavetto, Gianfranco Guglielmetti, Marco Ricci

Publikováno v: Tetrahedron Letters. 37:1091-1094

isosafrole (1a) and isoeugenol methyl ether (1b), two closely related substrates, behave very differently when subjected to manganese porphyrins catalysed epoxidation by sodium hypochlorite. A possible explanation is given, in terms of an unusual com

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https://doi.org/10.1016/0040-4039(95)02312-7

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Syndiospecific oligomerization and polymerization of norbornene with titanium catalysts

Autor: Paolo Biagini, Arnaldo Rapallo, Lido Porri, Giovanni Ricci, Gianfranco Guglielmetti, Giuseppe Leone

Publikováno v: Polymer (Guildford) 52 (2011): 5708–5715. doi:10.1016/j.polymer.2011.10.029
info:cnr-pdr/source/autori:Ricci, G.; Leone, G.; Rapallo, A.; Biagini, A.; Guglielmetti G.; Porri L./titolo:Syndiospecific oligomerization and polymerization of norbornene with titanium catalysts/doi:10.1016%2Fj.polymer.2011.10.029/rivista:Polymer (Guildford)/anno:2011/pagina_da:5708/pagina_a:5715/intervallo_pagine:5708–5715/volume:52

Norbornene (NB) has been polymerized with TiCl 4 –AlR 2 Cl (R = Et, Me, i Bu) at various NB/TiCl 4 molar ratio. The products obtained at low ratio (from ca. 5 to 12, depending on the mode of catalyst preparation) are a mixture of oligomers, from wh

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