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- Leonardo Castellani, Anna Ceresole, Riccardo D’Auria, Sergio Ferrara, Pietro Fré, Mario Trigiante
- 1998

We discuss the class of BP S saturated M –branes that are in one–to–one correspondence with the Freund–Rubin compactifications of M–theory on either AdS 4 × G/H or AdS 7 × G/H, where G/H is one of the seven (or four) dimensional Einstein coset manifolds with Killing spinors classified long ago in the context of Kaluza–Klein supergravity. These G/H M–branes,… (More)

- C Cohen, B Reinhardt, L Castellani, P Norton, M Stirewalt
- The Journal of cell biology
- 1982

One of the most severe and widespread of human diseases is caused by the parasitic schistosome flatworm. The life cycle of this blood fluke involves asexual larval reproduction in an intermediate snail host, giving rise to the infectious free-swimming cercarial form. After penetrating the human tissue, the worms develop into adults that become situated in… (More)

- Paolo Aschieri, Leonardo Castellani
- 1993

This review is based on two lectures given at the 2000 TMR school in Torino *. We discuss two main themes: i) Moyal-type deformations of gauge theories, as emerging from M-theory and open string theories, and ii) the noncommutative geometry of finite groups, with the explicit example of Z 2 , and its application to Kaluza-Klein gauge theories on discrete… (More)

Free differential algebras (FDA's) provide an algebraic setting for field theories with antisymmetric tensors. The " presentation " of FDA's generalizes the Cartan-Maurer equations of ordinary Lie algebras, by incorporating p-form potentials. An extended Lie derivative along antisymmetric tensor fields can be defined, and used to recover a Lie algebra dual… (More)

- Paolo Aschieri, Leonardo Castellani
- 2009

We consider noncommutative geometries obtained from a triangular Drinfeld twist and review the formulation of noncommutative gravity. A detailed study of the abelian twist geometry is presented. Inspired by [1, 2], we obtain solutions of noncommutative Einstein equations by considering twists that are compatible with the curved spacetime metric.

- Paolo Aschieri, Leonardo Castellani, Marija Dimitrijević
- 2008

A ⋆-product is defined via a set of commuting vector fields X a = e µ a (x)∂ µ , and used in a φ ⋆4 theory coupled to the e µ a (x) fields. The ⋆-product is dy-namical, and the vacuum solution φ = 0, e µ a = δ µ a reproduces the usual Moyal product. The action is invariant under rigid translations and Lorentz rotations , and the conserved energy-momentum… (More)

- L Castellani, P M Hardwicke, P Vibert
- Journal of molecular biology
- 1985

The three-dimensional structure of scallop sarcoplasmic reticulum membranes has been determined from electron micrographs of two classes of stain-filled tubules by helical reconstruction methods. These structures are characterized by dimer ribbons of Ca2+-ATPase molecules running diagonally around the tube wall. Deep right-handed grooves separate the… (More)

- C Franzini-Armstrong, D G Ferguson, L Castellani, L Kenney
- Annals of the New York Academy of Sciences
- 1986

- L Castellani, P M Hardwicke, C Franzini-Armstrong
- The Journal of cell biology
- 1989

Scallop sarcoplasmic reticulum (SR), visualized in situ by freeze-fracture and deep-etching, is characterized by long tubes displaying crystalline arrays of Ca2+-ATPase dimer ribbons, resembling those observed in isolated SR vesicles. The orderly arrangement of the Ca2+-ATPase molecules is well preserved in muscle bundles permeabilized with saponin.… (More)