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Mazet T, Malterre D, François M, Dallera C, Grioni M, Monaco G. Nonpareil Yb behavior in YbMn6Ge(6-x)Sn(x). PHYSICAL REVIEW LETTERS 2013; 111:096402. [PMID: 24033054 DOI: 10.1103/physrevlett.111.096402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Indexed: 06/02/2023]
Abstract
We investigate the temperature dependence of the Yb valence in YbMn6Ge1.8Sn4.2 and YbMn6Ge1.6Sn4.4 using resonant inelastic x-ray scattering experiments. Yb is found to be in an intermediate valent state in the whole investigated temperature range (10-450 K). We thus prove that the unusually high magnetic ordering temperature of Yb (∼60 and 90 K for x=4.2 and 4.4, respectively) involves an intermediate valent Yb, an unprecedentedly observed phenomenon. Further, an anomalous increase in the Yb valence is observed upon cooling. A scenario is proposed to explain this unusual behavior. It is based on the presence of magnetically ordered Mn moments and on an Anderson Hamiltonian with a Zeeman term modeling the magnetic interactions.
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Ruta B, Baldi G, Scarponi F, Fioretto D, Giordano VM, Monaco G. Acoustic excitations in glassy sorbitol and their relation with the fragility and the boson peak. J Chem Phys 2013; 137:214502. [PMID: 23231246 DOI: 10.1063/1.4768955] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report a detailed analysis of the dynamic structure factor of glassy sorbitol by using inelastic X-ray scattering and previously measured light scattering data [B. Ruta, G. Monaco, F. Scarponi, and D. Fioretto, Philos. Mag. 88, 3939 (2008)]. The thus obtained knowledge on the density-density fluctuations at both the mesoscopic and macroscopic length scale has been used to address two debated topics concerning the vibrational properties of glasses. The relation between the acoustic modes and the universal boson peak (BP) appearing in the vibrational density of states of glasses has been investigated, also in relation with some recent theoretical models. Moreover, the connection between the elastic properties of glasses and the slowing down of the structural relaxation process in supercooled liquids has been scrutinized. For what concerns the first issue, it is here shown that the wave vector dependence of the acoustic excitations can be used, in sorbitol, to quantitatively reproduce the shape of the boson peak, supporting the relation between BP and acoustic modes. For what concerns the second issue, a proper study of elasticity over a wide spatial range is shown to be fundamental in order to investigate the relation between elastic properties and the slowing down of the dynamics in the corresponding supercooled liquid phase.
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Akl H, Monaco G, La Rovere R, Welkenhuyzen K, Kiviluoto S, Vervliet T, Molgó J, Distelhorst CW, Missiaen L, Mikoshiba K, Parys JB, De Smedt H, Bultynck G. IP3R2 levels dictate the apoptotic sensitivity of diffuse large B-cell lymphoma cells to an IP3R-derived peptide targeting the BH4 domain of Bcl-2. Cell Death Dis 2013; 4:e632. [PMID: 23681227 PMCID: PMC3674349 DOI: 10.1038/cddis.2013.140] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Disrupting inositol 1,4,5-trisphosphate (IP3) receptor (IP3R)/B-cell lymphoma 2 (Bcl-2) complexes using a cell-permeable peptide (stabilized TAT-fused IP3R-derived peptide (TAT-IDPS)) that selectively targets the BH4 domain of Bcl-2 but not that of B-cell lymphoma 2-extra large (Bcl-Xl) potentiated pro-apoptotic Ca2+ signaling in chronic lymphocytic leukemia cells. However, the molecular mechanisms rendering cancer cells but not normal cells particularly sensitive to disrupting IP3R/Bcl-2 complexes are poorly understood. Therefore, we studied the effect of TAT-IDPS in a more heterogeneous Bcl-2-dependent cancer model using a set of ‘primed to death' diffuse large B-cell lymphoma (DL-BCL) cell lines containing elevated Bcl-2 levels. We discovered a large heterogeneity in the apoptotic responses of these cells to TAT-IDPS with SU-DHL-4 being most sensitive and OCI-LY-1 being most resistant. This sensitivity strongly correlated with the ability of TAT-IDPS to promote IP3R-mediated Ca2+ release. Although total IP3R-expression levels were very similar among SU-DHL-4 and OCI-LY-1, we discovered that the IP3R2-protein level was the highest for SU-DHL-4 and the lowest for OCI-LY-1. Strikingly, TAT-IDPS-induced Ca2+ rise and apoptosis in the different DL-BCL cell lines strongly correlated with their IP3R2-protein level, but not with IP3R1-, IP3R3- or total IP3R-expression levels. Inhibiting or knocking down IP3R2 activity in SU-DHL-4-reduced TAT-IDPS-induced apoptosis, which is compatible with its ability to dissociate Bcl-2 from IP3R2 and to promote IP3-induced pro-apoptotic Ca2+ signaling. Thus, certain chronically activated B-cell lymphoma cells are addicted to high Bcl-2 levels for their survival not only to neutralize pro-apoptotic Bcl-2-family members but also to suppress IP3R hyperactivity. In particular, cancer cells expressing high levels of IP3R2 are addicted to IP3R/Bcl-2 complex formation and disruption of these complexes using peptide tools results in pro-apoptotic Ca2+ signaling and cell death.
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Baldi G, Zanatta M, Gilioli E, Milman V, Refson K, Wehinger B, Winkler B, Fontana A, Monaco G. Emergence of crystal-like atomic dynamics in glasses at the nanometer scale. PHYSICAL REVIEW LETTERS 2013; 110:185503. [PMID: 23683216 DOI: 10.1103/physrevlett.110.185503] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Indexed: 06/02/2023]
Abstract
The vibrational dynamics of a permanently densified silica glass is compared to the one of an α-quartz polycrystal, the silica polymorph of the same density and local structure. The combined use of inelastic x-ray scattering experiments and ab initio numerical calculations provides compelling evidence of a transition, in the glass, from the isotropic elastic response at long wavelengths to a microscopic regime as the wavelength decreases below a characteristic length ξ of a few nanometers, corresponding to about 20 interatomic distances. In the microscopic regime the glass vibrations closely resemble those of the polycrystal, with excitations related to the acoustic and optic modes of the crystal. A coherent description of the experimental results is obtained assuming that the elastic modulus of the glass presents spatial heterogeneities of an average size a ~ ξ/2 π.
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Ruta B, Baldi G, Monaco G, Chushkin Y. Compressed correlation functions and fast aging dynamics in metallic glasses. J Chem Phys 2013; 138:054508. [DOI: 10.1063/1.4790131] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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56
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Inkinen J, Sakko A, Ruotsalainen KO, Pylkkänen T, Niskanen J, Galambosi S, Hakala M, Monaco G, Huotari S, Hämäläinen K. Temperature dependence of CO2 and N2 core-electron excitation spectra at high pressure. Phys Chem Chem Phys 2013; 15:9231-8. [DOI: 10.1039/c3cp50512j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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57
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Ruta B, Chushkin Y, Monaco G, Cipelletti L, Pineda E, Bruna P, Giordano VM, Gonzalez-Silveira M. Atomic-scale relaxation dynamics and aging in a metallic glass probed by x-ray photon correlation spectroscopy. PHYSICAL REVIEW LETTERS 2012; 109:165701. [PMID: 23215091 DOI: 10.1103/physrevlett.109.165701] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Indexed: 06/01/2023]
Abstract
We use x-ray photon correlation spectroscopy to investigate the structural relaxation process in a metallic glass on the atomic length scale. We report evidence for a dynamical crossover between the supercooled liquid phase and the metastable glassy state, suggesting different origins of the relaxation process across the transition. Furthermore, using different cooling rates, we observe a complex hierarchy of dynamic processes characterized by distinct aging regimes. Strong analogies with the aging dynamics of soft glassy materials, such as gels and concentrated colloidal suspensions, point at stress relaxation as a universal mechanism driving the relaxation dynamics of out-of-equilibrium systems.
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Simonelli L, Saini NL, Mizuguchi Y, Takano Y, Mizokawa T, Baldi G, Monaco G. Electronic properties of FeSe(1-x)Te(x) probed by x-ray emission and absorption spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:415501. [PMID: 23006467 DOI: 10.1088/0953-8984/24/41/415501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The electronic structure of FeSe(1-x)Te(x) chalcogenide superconductors has been studied by x-ray emission (XES) and x-ray absorption (XAS) as a function of Te substitution. The Fe Kβ XES spectra reveal a relatively low spin state for Fe in FeSe(1-x)Te(x) superconductors, persisting in the whole range of Te substitution. The Fe K-edge high-resolution XAS shows systematic spectral changes due to the evolving hybridization between the Fe 3d (4p) and chalcogen p (d) orbitals. The resonant inelastic x-ray scattering (RIXS) spectra hardly show any feature except the one due to charge transfer from occupied to unoccupied bands, that changes substantially from FeSe to FeTe. The results provide important information on the electronic states and their evolution in the FeSe(1-x)Te(x) chalcogenides.
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Monaco G, Decrock E, Akl H, Ponsaerts R, Vervliet T, Luyten T, De Maeyer M, Missiaen L, Distelhorst CW, De Smedt H, Parys JB, Leybaert L, Bultynck G. Selective regulation of IP3-receptor-mediated Ca2+ signaling and apoptosis by the BH4 domain of Bcl-2 versus Bcl-Xl. Cell Death Differ 2012; 19:295-309. [PMID: 21818117 PMCID: PMC3263504 DOI: 10.1038/cdd.2011.97] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 05/02/2011] [Accepted: 06/13/2011] [Indexed: 12/11/2022] Open
Abstract
Antiapoptotic B-cell lymphoma 2 (Bcl-2) targets the inositol 1,4,5-trisphosphate receptor (IP(3)R) via its BH4 domain, thereby suppressing IP(3)R Ca(2+)-flux properties and protecting against Ca(2+)-dependent apoptosis. Here, we directly compared IP(3)R inhibition by BH4-Bcl-2 and BH4-Bcl-Xl. In contrast to BH4-Bcl-2, BH4-Bcl-Xl neither bound the modulatory domain of IP(3)R nor inhibited IP(3)-induced Ca(2+) release (IICR) in permeabilized and intact cells. We identified a critical residue in BH4-Bcl-2 (Lys17) not conserved in BH4-Bcl-Xl (Asp11). Changing Lys17 into Asp in BH4-Bcl-2 completely abolished its IP(3)R-binding and -inhibitory properties, whereas changing Asp11 into Lys in BH4-Bcl-Xl induced IP(3)R binding and inhibition. This difference in IP(3)R regulation between BH4-Bcl-2 and BH4-Bcl-Xl controls their antiapoptotic action. Although both BH4-Bcl-2 and BH4-Bcl-Xl had antiapoptotic activity, BH4-Bcl-2 was more potent than BH4-Bcl-Xl. The effect of BH4-Bcl-2, but not of BH4-Bcl-Xl, depended on its binding to IP(3)Rs. In agreement with the IP(3)R-binding properties, the antiapoptotic activity of BH4-Bcl-2 and BH4-Bcl-Xl was modulated by the Lys/Asp substitutions. Changing Lys17 into Asp in full-length Bcl-2 significantly decreased its binding to the IP(3)R, its ability to inhibit IICR and its protection against apoptotic stimuli. A single amino-acid difference between BH4-Bcl-2 and BH4-Bcl-Xl therefore underlies differential regulation of IP(3)Rs and Ca(2+)-driven apoptosis by these functional domains. Mutating this residue affects the function of Bcl-2 in Ca(2+) signaling and apoptosis.
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Fujii J, Sperl M, Ueda S, Kobayashi K, Yamashita Y, Kobata M, Torelli P, Borgatti F, Utz M, Fadley CS, Gray AX, Monaco G, Back CH, van der Laan G, Panaccione G. Identification of different electron screening behavior between the bulk and surface of (Ga,Mn)As. PHYSICAL REVIEW LETTERS 2011; 107:187203. [PMID: 22107669 DOI: 10.1103/physrevlett.107.187203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Indexed: 05/31/2023]
Abstract
We report x-ray photoemission spectroscopy results on (Ga,Mn)As films as a function of both temperature and Mn doping. Analysis of Mn 2p core level spectra reveals the presence of a distinct electronic screening channel in the bulk, hitherto undetected in more surface sensitive analysis. Comparison with model calculations identifies the character of the Mn 3d electronic states and clarifies the role, and the difference between surface and bulk, of hybridization in mediating the ferromagnetic coupling in (Ga,Mn)As.
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Ruta B, Monaco G, Giordano VM, Scarponi F, Fioretto D, Ruocco G, Andrikopoulos KS, Yannopoulos SN. Nonergodicity Factor, Fragility, and Elastic Properties of Polymeric Glassy Sulfur. J Phys Chem B 2011; 115:14052-63. [DOI: 10.1021/jp2037075] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bruna P, Baldi G, Pineda E, Serrano J, Suck JB, Crespo D, Monaco G. Communication: Are metallic glasses different from other glasses? A closer look at their high frequency dynamics. J Chem Phys 2011; 135:101101. [DOI: 10.1063/1.3640002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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63
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Monaco G. Structure and vibrations in disordered systems. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311096875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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64
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Loa I, Syassen K, Monaco G, Vankó G, Krisch M, Hanfland M. Plasmons in sodium under pressure: increasing departure from nearly free-electron behavior. PHYSICAL REVIEW LETTERS 2011; 107:086402. [PMID: 21929183 DOI: 10.1103/physrevlett.107.086402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Indexed: 05/31/2023]
Abstract
We have measured plasmon energies in Na under high pressure up to 43 GPa using inelastic x-ray scattering (IXS). The momentum-resolved results show clear deviations, growing with increasing pressure, from the predictions for a nearly free-electron metal. Plasmon energy calculations based on first-principles electronic band structures and a quasiclassical plasmon model allow us to identify a pressure-induced increase in the electron-ion interaction and associated changes in the electronic band structure as the origin of these deviations, rather than effects of exchange and correlation. Additional IXS results obtained for K and Rb are addressed briefly.
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Monaco G, Garoli D, Natali M, Romanato F, Nicolosi P. Spectroscopic study of β-SiC prepared via PLD at 1064 nm. CRYSTAL RESEARCH AND TECHNOLOGY 2011. [DOI: 10.1002/crat.201000616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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66
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Chumakov AI, Monaco G, Monaco A, Crichton WA, Bosak A, Rüffer R, Meyer A, Kargl F, Comez L, Fioretto D, Giefers H, Roitsch S, Wortmann G, Manghnani MH, Hushur A, Williams Q, Balogh J, Parliński K, Jochym P, Piekarz P. Equivalence of the boson peak in glasses to the transverse acoustic van Hove singularity in crystals. PHYSICAL REVIEW LETTERS 2011; 106:225501. [PMID: 21702612 DOI: 10.1103/physrevlett.106.225501] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Indexed: 05/31/2023]
Abstract
We compare the atomic dynamics of the glass to that of the relevant crystal. In the spectra of inelastic scattering, the boson peak of the glass appears higher than the transverse acoustic (TA) singularity of the crystal. However, the density of states shows that they have the same number of states. Increasing pressure causes the transformation of the boson peak of the glass towards the TA singularity of the crystal. Once corrected for the difference in the elastic medium, the boson peak matches the TA singularity in energy and height. This suggests the identical nature of the two features.
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Riccardi F, Nappi O, Balzano A, De Palma M, Buonerba C, Rizzo M, Barbato C, De Dominicis G, Buonocore U, De Sena G, Lastoria S, Molino C, Monaco G, Rabitti PG, Romano L, Scavuzzo F, Suozzo R, Uomo G, Volpe R, Di Lorenzo G, Carteni G. Neuroendocrine tumors diagnosed at the Antonio Cardarelli hospital (Naples, Italy) between 2006-2009: a single-institution analysis. Int J Immunopathol Pharmacol 2011; 24:251-6. [PMID: 21496411 DOI: 10.1177/039463201102400132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Neuroendocrine tumors (NETs) are rare, with an incidence of about 5 per 100,000 inhabitants. As no study on NETs has ever been specifically conducted on the population of Campania, we performed a retrospective analysis of all newly diagnosed NETs at the Antonio Cardarelli hospital between 2006-2009. A search of the registry of the Pathology Department of the Antonio Cardarelli hospital was carried out to retrieve available data on all newly diagnosed NET cases. Two hundred and ninety-nine NET tumors were diagnosed at our Institution from January, 2006 to December, 2009. Globally, 121 patients (40% of the population) had a lung NET, while 92 patients (30% of the population) presented a GEP-NET. The most common primary tumor site varied by sex, with female patients being more likely to have a primary NET in the lung, breast or colon, and male patients being more likely to have a primary tumor in the lung. Also, twenty-three cases of breast NETs were identified, and clinical information regarding therapy and response was available for 22 patients. Our study represents a pioneering effort to provide the medical community in Campania with basic information on a large number of patients with different types of NETs. The Antonio Cardarelli hospital could greatly benefit from cooperation with other hospitals in order to become a highly specialized center for NETs in the region and Southern Italy.
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Comez L, Monaco G, Masciovecchio C, Paciaroni A, Gessini A, Scarponi F, Ruocco G, Fioretto D. Acoustic dissipation and density of states in liquid, supercooled, and glassy glycerol. PHYSICAL REVIEW LETTERS 2011; 106:155701. [PMID: 21568574 DOI: 10.1103/physrevlett.106.155701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2010] [Revised: 02/22/2011] [Indexed: 05/30/2023]
Abstract
Combined Brillouin spectra collected at visible, ultraviolet, and x-ray frequencies are used to reconstruct the imaginary part of the acoustic compliance J'' over a wide frequency range between 0.5 GHz and 5 THz. For liquid, supercooled, and glassy glycerol, J'' is found to be linearly dependent on the tagged-particle susceptibility measured by incoherent neutron scattering up to ≃1 THz, giving evidence of a clear relation between acoustic power dissipation and density of states. A simple but general formalism is presented to quantitatively explain this relation, thus clarifying the connection between the quasielastic component observed in neutron scattering experiments and the fast relaxation dynamics probed by Brillouin scattering.
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Mita L, Bianco M, Viggiano E, Zollo F, Bencivenga U, Sica V, Monaco G, Portaccio M, Diano N, Colonna A, Lepore M, Canciglia P, Mita DG. Bisphenol A content in fish caught in two different sites of the Tyrrhenian Sea (Italy). CHEMOSPHERE 2011; 82:405-410. [PMID: 20971495 DOI: 10.1016/j.chemosphere.2010.09.071] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 09/22/2010] [Accepted: 09/26/2010] [Indexed: 05/30/2023]
Abstract
Bisphenol A (BPA) is an endocrine disruptor (ED) that is abundant in the environment because of its extensive use in human-manufactured products. In this study, the BPA concentration was measured in the muscle and liver of five edible fish, characterized by different habitat and habits, caught in two different sites of the Tyrrhenian Sea (Italy). Our results show that: (i) fish livers are about 2.5 times more polluted than muscle; (ii) fish caught in the Gulf of Naples are more polluted than those from the Latium coasts, ranging from 1.2-fold more for White Bream to 6.6-fold for Grey Mullet; and (iii) the percentages of fish found to be BPA-polluted in the Gulf of Naples ranged from 73% (for Bass) to 90% (for Mullet), while the Latium fish range from 60% (for Bass) to 90% (for Mullet). These data indicate that consumers of fish caught in the Gulf of Naples are at a greater risk for BPA-induced endocrine pathologies compared to those who consume fish caught along the Latium coasts.
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Vicidomini ND, Guggino G, Monaco G. Quality of life in octogenarians with non small cell lung cancer: the strategic role of video assisted thoracic surgery. BMC Geriatr 2011. [PMCID: PMC3194395 DOI: 10.1186/1471-2318-11-s1-a65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Biondi A, Tropea A, Monaco G, Musumeci N, Benfatto G, Basile F. [Management of early rectal cancer: our clinical experience]. G Chir 2011; 32:34-36. [PMID: 21352705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM Patients with early rectal cancer (ERC) limited to the mucosa and submucosa does not present cytological or histological high risk features such as poorly differentiated cells, vascular and neural invasion, presence of mucinous histology and tumor ulceration. In these patients, local excision of rectal tumors preserves anal continence, bladder and sexual functions and achieves the same oncological results. In T1 patients, local excision is feasible because the curative rate is high (90/95%) and the risk of recurrence that is low ( 5/10%) as reported in the literature. Aim of this study is to carry out the best clinical choice in patients ERC affected. We have examined patologic, laboratory exams and surgical technique performed. PATIENTS AND METHODS From January 2004 to July 2009, 16 patients with rectal cancer were studied at the General Surgery and Oncology Department of Catania University. The middle size of the cancers at the implantation site were 3,4 cm (range: 3-5). The average distance from the anus were 5,8 cm (range: 4,5-10). The cancers were presented vegetanting and movable on the muscle surfaces below. RESULTS Istological exams pointed out pT1 neoplasia confined in submucosa in 13 patients, and in 3 patients pT2 neoplasia with a muscularis mucosae involvement. Istological grading found out G1 neoplasia in 9 cases and G2 in 7. Discussion. Low rectal cancers diagnosed in T1 stage necessitate an accurate preoperatory staging. Local exeresis can be a real alternative to traditional surgery. In these patients neoplasia exeresis can assure 5 years more survival in 85% of patients. CONCLUSION Local exeresis is a validate surgical way but is however necessary that istological exam confirms surgical oncology criteria. Must be confirmed that neoplasia is T1 with 1mm resection margin at least,differentiation G1-G2 and no venous or lymphatic infiltrations.
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Rocco D, De Ruggiero I, Rizzo M, Monaco R, Monaco G, De Michele F, Del Prato B, Aronne M, Romano L, De Divitiis C, Riccardi F. 55 THE HIGH INCIDENCE OF LUNG CANCER IN A GENERAL HOSPITAL: A RETROSPECTIVE SINGLE-INSTITUTION ANALYSIS IN 2009. Cancer Treat Rev 2010. [DOI: 10.1016/s0305-7372(10)70081-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pylkkänen T, Lehtola J, Hakala M, Sakko A, Monaco G, Huotari S, Hämäläinen K. Universal Signature of Hydrogen Bonding in the Oxygen K-Edge Spectrum of Alcohols. J Phys Chem B 2010; 114:13076-83. [DOI: 10.1021/jp106479a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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74
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Ruta B, Baldi G, Giordano VM, Orsingher L, Rols S, Scarponi F, Monaco G. Communication: High-frequency acoustic excitations and boson peak in glasses: A study of their temperature dependence. J Chem Phys 2010; 133:041101. [DOI: 10.1063/1.3460815] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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75
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Baldi G, Giordano VM, Monaco G, Ruta B. Sound attenuation at terahertz frequencies and the boson peak of vitreous silica. PHYSICAL REVIEW LETTERS 2010; 104:195501. [PMID: 20866974 DOI: 10.1103/physrevlett.104.195501] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Indexed: 05/29/2023]
Abstract
The propagation and damping of the acoustic excitations in vitreous silica is measured at terahertz frequencies using inelastic x-ray scattering. The apparent sound velocity shows a marked dispersion with frequency while the sound attenuation undergoes a crossover from a fourth to a second power law frequency dependence. This finding solves a recent controversy concerning the location of this crossover in vitreous silica, clarifying that it occurs at the position of the glass-characteristic excess of vibrational modes known as boson peak, and thus establishing a direct connection between boson peak and acoustic dispersion curves.
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