Search results for "germani"
showing 10 items of 488 documents
A Germanium Isocyanide Complex Featuring (n -> π*) Back-Bonding and Its Conversion to a Hydride/Cyanide Product via C–H Bond Activation under Mild Co…
2012
Reaction of the diarylgermylene Ge(Ar(Me(6)))(2) [Ar(Me(6)) = C(6)H(3)-2,6-(C(6)H(2)-2,4,6-(CH(3))(3))(2)] with tert-butyl isocyanide gave the Lewis adduct species (Ar(Me(6)))(2)GeCNBu(t), in which the isocyanide ligand displays a decreased C-N stretching frequency consistent with an n → π* back-bonding interaction. Density functional theory confirmed that the HOMO is a Ge-C bonding combination between the lone pair of electrons on the germanium atom and the C-N π* orbital of the isocyanide ligand. The complex undergoes facile C-H bond activation to produce a new diarylgermanium hydride/cyanide species and isobutene via heterolytic cleavage of the N-Bu(t) bond.
Ara ojats qeus notifiquen, y fan á saber de part de ... Carlos Homodei Moura ... Virrey ... que per quant haventse commogut, y juntat gran multitud …
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Complete Measurement of the Λ Electromagnetic Form Factors.
2019
The exclusive process e+e−→ΛΛ¯, with Λ→pπ− and Λ¯→p¯π+, has been studied at s=2.396 GeV for measurement of the timelike Λ electric and magnetic form factors, GE and GM. A data sample, corresponding to an integrated luminosity of 66.9 pb−1, was collected with the BESIII detector for this purpose. A multidimensional analysis with a complete decomposition of the spin structure of the reaction enables a determination of the modulus of the ratio R=|GE/GM| and, for the first time for any baryon, the relative phase ΔΦ=ΦE−ΦM. The resulting values are R=0.96±0.14(stat)±0.02(syst) and ΔΦ=37°±12°(stat)±6°(syst), respectively. These are obtained using the recently established and most precise value of …
Sentieri interrotti. Musicisti europei nel crepuscolo dell'Occidente
2012
Il volume descrive il contesto in cui vedono la luce le due mostre dedicate all’Arte Degenerata (Monaco 1937) e alla Musica Degenerata (Düsseldorf 1938), soffermandosi in modo particolare sui percorsi biografici e artistici di quattro compositori la cui biografia venne sconvolta dalla politica culturale nazista: Franz Schreker, Alexander Zemlinsky, Erich Wolfgang Korngold e Viktor Ullmann. Si tratta di autori di origine ebraica, legati in vario modo alla vita musicale di città come Berlino, Vienna e Praga, assai diversi per formazione e linguaggio, ma tutti travolti da una serie di eventi (l'avvento al potere di Hitler, la guerra, la Shoah) che trasformarono i loro percorsi biografici in al…
Esuberanza e mistero
2011
Il testo è stato realizzato in occasione di un'esecuzione della Sinfonia n. 8 in sol maggiore op. 88 di Antonìn Dvoràk e di due brani vocali di Johannes Brahms: "Schicksalslied" per coro e orchestra op. 54 e "Naenie" per coro e orchestra op. 82. In particolare, per quanto riguarda le opere di Brahms, viene analizzato il contesto biografico in cui vedono la luce e il rapporto fra la struttura musicale e i testi poetici di Hoelderlin e di Schiller.
Destino della musica europea nell'epoca dei regimi totalitari
2001
Il saggio descrive, con particolare riferimento all'ambito della musica colta, i principali aspetti della politia culturale nell'Italia fascista, nella Germania nazista e in Unione Sovietica.
Guido Erwin Kolbenheyer und seine Rezeption des 16. Jahrhunderts am Beispiel der Trilogie des Paracelsus (1917-26).
2016
Der Beitrag fokussiert sich auf die Mystifizierung der paracelsisichen Gedanken, der Figur von Paracelsus selbst sowie des religiösen Diskurses und von manchen Debatten des 16. Jahrhunderst durch Guido Erwin Kolbenheyer. Im Mittelpunkt der Untersuchung steht die Herausbildung des "Andersartigen", der im Kontext einer nationalistischen und fremdenfeindlichen Gesinnug zum Inbegriff einer überlegenen pangermanischen Identität aufgefasst wird.
Role of Ge nanoclusters in the performance of photodetectors compatible with Si technology
2013
In this work, we investigate the spectral response of metal-oxide- semiconductor photodetectors based on Ge nanoclusters (NCs) embedded in a silicon dioxide (SiO2) matrix. The role of Ge NC size and density on the spectral response was evaluated by comparing the performance of PDs based on either densely packed arrays of 2 nm-diameter NCs or a more sparse array of 8 nm-diameter Ge NCs. Our Ge NC photodetectors exhibit a high spectral responsivity in the 500-1000 nm range with internal quantum efficiency of ~ 700% at - 10 V, and with NC array parameters such as NC density and size playing a crucial role in the photoconductive gain and response time. We find that the configuration with a more…
Nanowires for NEMS Switches
2020
Nanoelectromechanical systems (NEMS) are a promising novel technology for operation in extreme conditions (e.g. high temperature and radiation levels), where complementary semiconductor technology devices might fail due to electronic instability. An example for a NEMS device is a nanowire-based switch, which employs mechanical deflection of a nanowire to open and close an electrical circuit. To date, assembly and operation of individual nanowire based NEMS switches have been successfully demonstrated at laboratory level, but their further technological development remains a challenge. This chapter gives an insight into the current advances in applications of nanowires for NEMS switches. Syn…
Thermoelectric properties of atomic-thin silicene and germanene nano-structures
2014
The thermoelectric properties in one- and two-dimensional silicon and germanium structures have been investigated using first-principles density functional techniques and linear response for the thermal and electrical transport. We have considered here the two-dimensional silicene and germanene, together with nanoribbons of different widths. For the nano ribbons, we have also investigated the possibility of nano structuring these systems by mixing silicon and germanium. We found that the figure of merit at room temperature of these systems is remarkably high, up to 2.5.