1,456 research outputs found
Petrarchismo politico. Su alcuni sonetti di Vittoria Colonna e Veronica Gambara
No full textIl contributo analizza alcuni sonetti di Vittoria Colonna e Veronica Gambara, quali esempi di petrarchismo femminile di materia politica, nell'ambito del più ampio fenomeno di imitazione dei componimenti civili petrarcheschi nel Cinquecent
Sorelle d'Italia. Scrittrici e identità nazionale. Introduzione
No full textSorelle d'Italia offre una riflessione critica sul contributo che poetesse e scrittrici di diverse epoche hanno dato alla costruzione del discorso identitario nazionale. I saggi raccolti nello studio tracciano una linea d'indagine che mostra come la scrittura delle donne si sia confrontata con una materia comunemente ritenuta di pertinenza maschile, dialogando talvolta in modo conflittuale con il discorso dominante, e restituendo prospettive formali e culturali alternative
Exact thermal and structural damping of the multiple scattering contributions to the XANES
No full textThermal and structural damping of the multiple-scattering contributions to the x-ray-absorption coefficient
No full textA monoclonal antibody (AB/3) reactive with human breast cancer
No full textMonoclonal antibody AB/3 was produced from a fusion of spleen cells of a human breast cancer cell-primed BALB/c mouse with the murine myeloma cell line P3-NS1-Ag4-1. The antibody reacted strongly with the plasma membrane of human breast cancer cells. Tissue sections of both malignant and benign human mammary carcinomas and tumors of non-breast origin as well as apparently normal tissues were tested with immunoperoxidase. Ninety-six of 124 (77%) primary human breast cancers, 12 of 14 (86%) metastatic breast lesions, and 12 of 44 (27%) benign breast lesions reacted positively. Little or no appreciable reactivity was observed with apparently normal human tissues and carcinomas of non-breast origin, with the exception of colon carcinoma. Antibody AB/3 did not immunoprecipitate any identifiable protein from radiolabeled extracts of the immunizing cell line
X-ray-absorption spectroscopy and n-body distribution functions in condensed matter .1. Theory
No full textThe general theoretical framework underlying the GNXAS multiple-scattering (MS) data-analysis method for x-ray absorption spectroscopy (XAS) is presented. The main approximations leading to the reduction of the many-body process in that of a photoelectron scattering in an effective potential are summarized. The methods available to expand the extended x-ray-absorption fine-structure chi(k) into physically meaningful terms are described, In particular, emphasis is given to the definition of the irreducible n-body signals gamma((n)) that can be calculated directly by means of linear combinations of continued fractions, or by using their respective multiple-scattering series. It is found that even for an infinite system the expansion of the chi(k) signal in terms of gamma((n)) has a better convergence rate than the MS series. Simple expressions for performing the configurational averages of the structural signals in the presence of thermal and structural disorder are derived. These can be used for the structural analysis of molecular, crystalline, or moderately disordered systems. It is shown that in the case of highly disordered systems the expansion in terms of the gamma((n)) signals is the natural framework for the interpretation of the XAS signal. General equations for the ensemble-averaged chi(k) signal as a function of a series of integrals over the n-body n > 2 distribution functions g(n) an provided and the possible use of advanced strategies for the inversion of the structural information is suggested
- …
