846 research outputs found
Risorse | Diario di viaggio di Antonio Locatelli (1923)
No full textUn'illustrazione di Antonio Locatelli, tratta dal diario In rete è disponibile un bellissimo sito che riporta fedelmente il diario del viaggio intorno al mondo compiuto nel 1923 dall'aviatore Antonio Locatelli (1895-1936); fra le tappe, naturalmente, figurava anche il Giappone. Al paese asiatico sono dedicate molte pagine - che è possibile leggere online - corredate da disegni e fotografie dello stesso Locatelli. *** Disegno di Antonio Locatelli, tratto dal sito Intorno al mondo (Canzoni nost..
CAP4KAM_nDOF: Computer-Assisted Proofs of existence of KAM tori in Hamiltonian systems with n (>=2) Degrees Of Freedom
No full textIn the folder you can produce by uncompressing the attached zippedfile (namely, that folder is called "CAP4KAM_nDOF"), you should findeverything you need in order to perform a complete computer-assistedproof of existence of invariant tori for a Hamiltonian that satifiesthree assumptions: (i) it describes a (Hamiltonian) system with n>=2 degrees of freedom and its canonical coordinates are n pairs of action-angle variables; (ii) it is close enough to a Kolmogorov normal form (so fulfilling also both the non-resonance and the non-degeneracy conditions usually adopted in the framework of KAM theory); (iii) its expansion in Taylor series (with respect to the actions) is finite, while its Fourier expansions (in the angles) can be infinite.The software included in the present folder "CAP4KAM_nDOF" is anextension of a first public release that was a sort of supplementarymaterial of the paper [VL], i.e.,Locatelli, Ugo (2021), “CAP4KAM2D: Computer-Assisted Proofs Fordemonstrating the existence of 2-Dimensional KAM tori”, MendeleyData, V1, doi: 10.17632/jdx22ysh2s.1The software included in the folder "CAP4KAM_nDOF" is designed tobe in a "easy-to-use" layout. Moreover, it is probably not too difficultto be modified for people expert in programming (in C).Everything about the files included in the folder "CAP4KAM_nDOF" iswidely described in the README.txt, that contains also carefulexplanations that should be useful for running the codes, monitoringthe results, modifying the input files, etc.Eventual corrections or remarks about the software package includedin the folder "CAP4KAM_nDOF" are more than welcome and can besent to the author (Ugo Locatelli) at the following e-mail address: [email protected]
Jean Tardieu, père et artiste. Entretien avec Alix Turolla-Tardieu
No full textInterview of Alix Turolla-Tardieu, the daughter of the poet and author Jean Tardieu
Divulgazione | Il diario giapponese di Antonio Locatelli (1923)
No full textUna fotografia di Antonio Locatelli Nel n. 116 di Pagine Zen (scaricabile gratuitamente da questo link) troverete un mio breve scritto dedicato al (purtroppo) semi-sconosciuto diario di viaggio giapponese di Antonio Locatelli (1895-1936), da lui definita una raccolta di «[n]ote succinte senza grammatica, prese in piedi, in carrozza, a cavallo in ritkshow, in piroscafo, e in treno – corredati di schizzi gettati sulla carta in brevi momenti». Buona lettura! La fotografia di Locatelli è tr..
UNITY-Locatelli Meeting Notes
No full textTyped document titled 'UNITY-Father Locatelli Meeting 4/14/89.' Document includes five numerical bullets with agenda items the include an introduction/welcome; history of UNITY; information regarding UNITY "today"; demands; and a session titled 'Open for discussion.' Documents features handwritten notes in black ink. Document does not specify author of agenda or notes
PERCHLORATES AS POWERFUL CATALYSTS IN MANY IMPORTANT ORGANIC TRANSFORMATIONS
No full textFor long times, metallic perchlorates have been considered dangerous compounds[1] in that they function as explosives and as incontrollable oxidizers.
Therefore, the fear of the great hazard connected with their manufacture and uses had prevented an extensive use both in research laboratories and in industrial processes.[2]
However, recently it has been cleared that this bad reputation is due to the mistaken association of metallic perchlorates with the oxidizing potential of perchloric acid and the pyrotechnic performances of NH4ClO4.
In this conference, we report that Magnesium and Zinc perchlorates can be used as powerful Lewis acids in several organic transformations which are commonly employed both in laboratory and industrial processes.
As depicted in the Scheme, perchlorates are able to promote a series of reactions such as:
a) Acylation of alcohols[3,4]
b) Fisher esterification[5]
c) Synthesis of b–enamino esters[6]
d) Protection of the amino group as N-Boc derivative[7]
Moreover, they can act as specific catalysts for the development of a new organic transformations. In fact, the treatment of an alcohol or a phenol with Boc2O in the presence of Mg(ClO4)2 leads to the unexpected formation of the corresponding t-butyl ethers.[8] This represents the first general method to synthesize aromatic t-butyl ethers.
In an analogous manner, the treatment of phenols with diethyl dicarbonate results in a very efficient method to produce difficulty available aryl ethyl carbonates.
Several of the above mentioned transformations can be carried out in the absence of the solvent, and often the catalyst can be easily recovered and reused without an appreciable loss of activity.
Acknowledgement
Work carried out in the framework of the National Project “Stereoselezione in Sintesi Organica. Metodologie e Applicazioni” supported by MIUR, Rome, by the University of Bologna, in the framework of “Progetto di Finanziamento Pluriennale, Ateneo di Bologna”, and by National project FIRB “Progettazione, preparazione e valutazione biologica e farmacologica di nuove molecole organiche quali potenziali farmaci”
References
[1] Schumacher, J. C. Perchlorates-Their Properties, Manufacture and Uses, ACS Monograph Series, Reinhold: New York, 1960.Author. Title[J]. Name of the journal, Year, Volume(Issue): initial page and ending page (Optional).
[2] Long, J. Chemical Health & Safety, 2002, 9, 12.
[3] Bartoli, G.; Bosco, M.; Dalpozzo, R.; Marcantoni, E.; Massaccesi, M.; Rinaldi, S.; Sambri, L. Synlett, 2003, 39.
[4] Bartoli, G.; Bosco, M.; Dalpozzo, R.; Marcantoni, E.; Massaccesi, M.; Sambri, L. Eur. J. Org. Chem. 2003, 4611.
[5] a) Gooβen, L.; Döhring, A. Adv. Synth. Catal. 2003, 345, 943; b) Bartoli, G.; Boeglin, J.; Bosco, M.; Locatelli, M.; Massaccesi, M.; Melchiorre, P.; Sambri, L. Adv. Synth. Catal. 2005, 347, 33.
[6] Bartoli, G.; Bosco, M.; Locatelli, M.; Marcantoni, E.; Melchiorre, P.; Sambri, L. Synlett 2004, 239.
[7] Bartoli, G.; Bosco, M.; Locatelli, M.; Marcantoni, E.; Massaccesi, M.; Melchiorre, P.; Sambri, L. Synlett 2004, 1794.
[8] Bartoli, G.; Bosco, M.; Locatelli, M.; Marcantoni, E.; Melchiorre, P.; Sambri, L. Org. Lett., 2004, 7, 427
"Re-figuring Classical Myth in Early-Modern England: Orpheus as 'Tutelary Deity' of Poetry and Civilization"
No full textTrattamento chemioterapico dei pazienti di età pediatrica con leucemia mieloide acuta: risultati del registro italiano
No full textLe ricadute economiche e sociali della presenza dell'Università dell'Insubria
No full textAnalisi dell'impatto sui territori di insediamento dell'Ateneo a dieci anni dalla sua costituzione. Il volume comprende un contributo di G. Garofoli Lucia Cusmano e Alessandro latella che, dopo una rassegna della letteratura propone una valutazione dell'impatto attraverso una metodologia di analisi macroeconomica della presenza dell'Università sull'economia dei territori. Un secondo contributo, di Anna Arcari e Alfredo Biffi illustra i risultati di una indagine condotta su un ampio campione di laureati e ne misura la valutazione della qualità dei servizi formativi resi nonchè delle vicenze occupazionali dopo la laurea
- …
