Evolution of the Spin Magnetic Moments and Atomic Valence of Vanadium in VCux+, VAgx+, and VAux+ Clusters (x = 3–14)

The atomic structures, bonding characteristics, spin magnetic moments, and stability of VCUx+, VAgx+, and VAux+ (x = 3-14) clusters were examined using density functional theory. Our studies indicate that the effective valence of vanadium is size-dependent and that at small sizes some of the valence electrons of vanadium are localized on vanadium, while at larger sizes the 3d orbitals of the vanadium participate in metallic bonding eventually quenching the spin magnetic moment. The electronic stability of the clusters may be understood through a split-shell model that partitions the valence electrons in either a delocalized shell or localized on the vanadium atom. A molecular orbital analysis reveals that in planar clusters the delocalizatibn of the 3d orbital of vanadium is enhanced when surrounded by gold due to enhanced 6s-5d hybridization. Once the clusters become three-dimensional, this hybridization is reduced, and copper most readily delocalizes the vanadium\u27s valence electrons. By understanding these unique features, greater insight is offered into the role of a host material\u27s electronic structure in determining the bonding characteristics and stability of localized spin magnetic moments in quantum confined systems

Applications of Density Functional Theory to Theoretical Organic Chemistry

An overview of applications of density functional theory (KS/DZVP-GGA, demon2k, or B3LYP/6-311G(d,p), Gaussian 09) to a wide range of problems in theoretical organic chemistry with examples is given, namely thermodynamic properties, geometries (bullvalene), charges (glycine cation), dipole moments, electrostatic potential (acetyl chloride and acetamide), spectroscopy (IR/Raman: acetaldehyde, UV/Vis: polyenes, NMR: thujone and EPR: Koelsch’s radical), gas phase acidities and pKa values (substituted benzoic acids), supramolecular chemistry (quinhydrone complex), and reaction pathways

I giovani a bassa scolarità in due quartieri torinesi

Working Paper ; n.104- Indice #3- Giovani a bassa scolarità a Torino: un problema degli anni '90 #5- Lavoro e scolarità nei giovani torinesi #7- Giovani a bassa scolarità nei quartieri S.Donato e Regio Parco #23- Approfondimenti. I giovani e la scuola #33- I giovani nel quartiere San Donato #35- I giovani el quartiere Regio Parco/Barca/Bertolla #53- La scuola a S. Donato #65- La scuola a Regio Parco/Barca/Bertola #89- Appendice: le circoscrizioni di riferimento #10

Morphological effects of AMPA lesions of the rat nucleus basalis magnocellularis and of transplants of fetal neuronal tissue into the cortex

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN013656 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Expression of the CD2AP adaptor molecule in normal, reactive and neoplastic human tissue.

none18siAIMS: To study the expression of CD2-associated protein (CD2AP), an adaptor protein involved in T-cell signalling and renal function, in normal, reactive and neoplastic human lymphoid tissues. METHODS AND RESULTS: We used immunohistochemical techniques to evaluate monoclonal antibodies against CD2AP on over 400 formalin fixed paraffin embedded tissue blocks retrieved from the host institutions of three authors. The samples tested included normal, reactive and neoplastic lymphoid tissue. In lymphoid tissues, strong CD2AP staining was observed in plasmacytoid dendritic cells (pDCs), weak and variable in mantle zone B cells and moderate in rare germinal center cells. CD2AP labeled cortical and rare medullary thymocytes and isolated mononuclear cells in bone marrow trephines. Furthermore, epithelial and endothelial cells expressed CD2AP. Among neoplasms, the greatest number of CD2AP-positive cases were found in diffuse large B cell (21/94), NK T-cell lymphomas (7/67), "blastic plasmacytoid dendritic cell neoplasms" (9/10) and some types of solid tumor. CONCLUSIONS: Our finding that mature peripheral T cells are CD2AP-negative but immature cortical thymocytes are positive may prove useful for diagnostic purposes. Moreover, our results demonstrate that CD2AP represents a useful marker of normal and neoplastic pDC and may be used in a diagnostic panel in reactive or neoplastic lymphoid proliferations.noneRizvi H;Paterson JC;Tedoldi S;Ramsay A;Calaminici M;Natkunam Y;Lonardi S;Tan SY;Campbell L;Hansmann ML;Jones D;Dikic I;Shaw AS;Pileri SA;Stein H;Mason DY;Facchetti F;Marafioti TRizvi H;Paterson JC;Tedoldi S;Ramsay A;Calaminici M;Natkunam Y;Lonardi S;Tan SY;Campbell L;Hansmann ML;Jones D;Dikic I;Shaw AS;Pileri SA;Stein H;Mason DY;Facchetti F;Marafioti

Scrivere nell'anima: informazione, sapere e tecnologie della parola

L’educazione degli adulti è lo strumento fondamentale dello sviluppo della persona finalizzato alla creazione di utensili e metodi aggiornabili e trasferibili per leggere la realtà ed interagire in modo positivo con il mondo che cambia. È sostanziata quindi da “saperi” diversi per oggetto e per statuto interno, ma tutti orientati a costruire un nuovo senso di cittadinanza, di responsabilità collettiva, di partecipazione consapevole, e a fornire quindi la possibilità concreta di governare fenomeni come i mutamenti demografici, i movimenti migratori, i processi di integrazione ed inclusione sociale nella prospettiva di un modo diverso di produrre, di vivere, di consumare. È questo, nella diversità e nella ricchezza dei diversi punti di vista e dei diversi linguaggi il leitmotiv di questo volume, che raccoglie alcune delle relazioni e dei contributi che studiosi di varie discipline hanno svolto nel corso del 1° Festival dei Saperi tenutosi a Firenze il 23 e 24 gennaio 2009. Contributi di: Aureliana Alberici, Federico Batini, Pasquale Calaminici, Sergio Caltabiano, Fabrizio Dacrema, Marco da Vela, Giovanna Del Gobbo, Vittoria Gallina, Alfonso M. Iacono, Maria Luisa Iavarone, Paolo Orefice, Maria Chiara Pievatolo, Elio Satti, Paolo Sciclone