163,539 research outputs found
Flexural Strengthening of Impacted PC Girder with FRP Composites
No full textBoston, USA. S. Rizkalla and A. Nanni Eds., ACI Special Publication No. 215, American Concrete Institute, Farmington Hills, M
Supported gold nanoparticles catalysts for alkynes hydroamination.
No full textOur research group has previously reported the preparation of gold nanoparticles (AuNPs) supported on different functionalized silica supports. We started using commercial polyethyleneimine-functionalized silica bead [1] and we continued preparing silica nanoparticles functionalized with alkynyl carbamate moieties. [2]
Recently, we have focused on the straightforward synthesis of AuNPs anchored on commercial, micrometric oxide supports (i.e. SiO2, Al2O3, TiO2) previously modified with the di-functional organosilane [3-(2-propynylcarbamate)propyl]triethoxysilane (PPTEOS) by a grafting procedure. After being thoroughly characterized by several complementary techniques (XPS, TEM, SSNMR, AAS etc.), the catalytic activity of these systems (Au/OS@Yne) has been evaluated in the oxidation of alcohols both in batch and continuous-flow systems. [3]
Furthermore, we have extended the same synthetic procedure to the preparation of a novel and magnetically recoverable catalyst, consisting of AuNPs supported on functionalized nano-magnetite (Au/Fe3O4@Yne).
We now present the latest results obtained in the study of the catalytic application of Au/SiO2@Yne and Au/Fe3O4@Yne in the alkynes hydroamination reaction, which is considered the most atom efficient process for the formation of a series of nitrogen-containing compounds.
Indeed, this transformation takes place without the formation of any side product and leads to the production of enamine, imine or substituted amines, which have a significant importance as bulk and fine chemicals or building blocks in organic synthesis.
[1] S. Fazzini , D. Nanni , B. Ballarin , M. C. Cassani , M. Giorgetti , C. Maccato, A. Trapananti, G. Aquilanti and S. I. Ahmed, J. Phys. Chem. C. 2012, 116, 25434−25443; M. Giorgetti, G. Aquilanti, B. Ballarin, M. Berrettoni, M. C. Cassani, S. Fazzini, D. Nanni and D. Tonelli, Anal. Chem. 2016, 88, 6873-6880;
[2] S. Fazzini, M. C. Cassani, B. Ballarin, E. Boanini, J. S. Girardon, A.S. Mamede, A. Mignani and D. Nanni, J. Phys. Chem. C. 2014, 118, 24538-24547; M. C. Cassani, B. Ballarin, D. Barreca, E. Boanini, E. Bonansegna, G. Carraro, S. Fazzini, A. Mignani, D. Nanni, D. Pinelli, RSC Adv. 2016, 6, 25780-25788.
[3] B. Ballarin, D. Barreca, E. Boanini, M. C. Cassani, P. Dambruoso, A. Massi, A. Mignani, D. Nanni, C. Parise, A. Zaghi, ACS Sus. Chem. Eng. 2017, 5, 4746-4756
Flexural Strengthening of Impacted PC Girder with FRP Composites
No full textBoston, USA. S. Rizkalla and A. Nanni Eds., ACI Special Publication No. 215, American Concrete Institute, Farmington Hills, M
Synthesis, characterization and study of the catalytic activity of supported gold nanoparticles for alkynes hydroamination
No full textOur research group has previously reported the preparation of different silica supported gold nanoparticles (AuNPs) catalytically active in the reduction of nitrophenol to aminophenol. [1, 2] Recently, the focus of our research has shifted towards continuous flow nanocatalysis and for applications in packed bed reactors we have anchored AuNPs on commercial micrometer oxide supports (SiO2, Al2O3, TiO2), previously modified by grafting of the organosilane [3-(2-propynylcarbamate)propyl]triethoxysilane (PPTEOS). After thorough characterization, the catalytic activity of these systems has been evaluated in the oxidation of a large variety of primary and secondary alcohols, both under batch and continuous flow conditions. [3]
We now present the results in the field of the hydroamination of alkynes catalysed by Au/SiO2@Yne and the new, magnetically recoverable Au/Fe3O4@Yne catalyst.
[1] S. Fazzini , D. Nanni , B. Ballarin , M. C. Cassani , M. Giorgetti , C. Maccato, A. Trapananti, G. Aquilanti, and S. I. Ahmed, J. Phys. Chem. C. 116 (2012) 25434−25443; M. Giorgetti, G. Aquilanti, B. Ballarin, M. Berrettoni, M. C. Cassani, S. Fazzini, D. Nanni, and D. Tonelli, Anal. Chem. 88 (2016) 6873-6880;
[2] S. Fazzini, M. C. Cassani, B. Ballarin, E. Boanini, J. S. Girardon, A.S. Mamede, A. Mignani, and D. Nanni, J. Phys. Chem. C. 118 (2014) 24538-24547; M. C. Cassani, B. Ballarin, D. Barreca, E. Boanini, E. Bonansegna, G. Carraro, S. Fazzini, A. Mignani, D. Nanni, and D. Pinelli, RSC Adv. 6 (2016) 25780-25788.
[3] B. Ballarin, D. Barreca, E. Boanini, M. C. Cassani, P. Dambruoso, A. Massi, A. Mignani, D. Nanni, C. Parise, and A. Zaghi, ACS Sus. Chem. Eng. 5 (2017) 4746-4756
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
A representação do luto em O Quarto do Filho de Nanni Moretti
No full textEste trabalho investiga a representação do luto no filme O Quarto do Filho de Nanni Moretti. Para poder analisar o filme e compreender como o realizador faz esta representação, é feita uma extensa pesquisa que pode ser dividida em três partes: o realizador, o luto, e a representação do luto. Em primeiro lugar, o trabalho constitui uma pesquisa sobre o autor Nanni Moretti, onde se discute sua filmografia, as temáticas que costuma trabalhar, e a estética que utiliza em seus filmes. No segundo momento, o trabalho se propõe a buscar um entendimento sobre o que é o luto, analisando e compreendendo as ideias de Freud, Kübler-Ross e J. William Worden sobre o assunto. E por último, a pesquisa foca em investigar a representação do luto no cinema através das ideias de Richard Armstrong que acredita que o filme sobre o luto pode ser considerado um gênero cinematográfico por apresentarem estéticas semelhantes entre si. Com esta base teórica em mente é possível analisar e compreender como Nanni Moretti utiliza a linguagem cinematográfica para representar o luto em seu filme. Palavras-chave: Cinema, Linguagem cinematográfica, Nanni Moretti, O Quarto do Filho, Representação do lutoThis work investigates the representation of mourning in the film "The Son's Room" by Nanni Moretti. In order to analyze the film and comprehend how the director approaches this representation, an extensive research is conducted, which can be divided into three parts: the director, mourning, and the cinematic representation of mourning. Firstly, the study constitutes research on the author Nanni Moretti, delving into his filmography, the themes he commonly explores, and the aesthetics employed in his films. Secondly, the work aims to gain an understanding of what mourning entails by analyzing and comprehending the ideas of Freud, Kübler-Ross, and J. William Worden on the subject. Lastly, the research focuses on investigating the cinematic representation of mourning, drawing on the ideas of Richard Armstrong, who believes that films about mourning can be considered a cinematic genre due to their shared aesthetics. With this theoretical foundation in mind, it becomes possible to analyze and comprehend how Nanni Moretti utilizes cinematic language to represent mourning in his film. Keywords: Cinema, Cinematic language, Nanni Moretti, The Son's Room, Representation of grie
Dentro la formazione: le dimensioni educative del gioco e del racconto di sé. L'osservazione dei gruppi
No full textNarrazione autobiografica come maieutica dell’identità: una formazione tra il Me e il Senso degli altri
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