La colla di fibrina nelle ernioplastiche tension-free: nostra esperienza

Scopo di questo studio è dimostrare la possibilità, nell’ernioplastica secondo Lichtenstein, di fissare la mesh alle strutture muscolo-fasciali con colla di fibrina, evitando l’uso di punti di sutura. La fissazione della rete di prolene con Tissucol è stata effettuata in 28 pazienti, mentre nello stesso periodo la tecnica tradizionale di Lichtenstein è stata eseguita in altri 28 pazienti. I vantaggi dell’uso della colla di fibrina sono: nessun trauma chirurgico, perfetta fissazione della mesh, riduzione del dolore e della morbilità, abbassamento dei costi. La metodica è sicura e facilmente riproducibile. I risultati sono promettenti anche se la verifica va effettuata con casistiche più consistenti e follow-up più lungo

New algebraic properties of quadratic quotients of the Rees algebra

We study some properties of a family of rings R(I)_{a,b} that are obtained as quotients of the Rees algebra associated with a ring R and an ideal I. In particular, we give a complete description of the spectrum of every member of the family and describe the localizations at a prime ideal. Consequently, we are able to characterize the Cohen\u2013Macaulay and Gorenstein properties, generalizing known results stated in the local case. Moreover, we study when R(I)_{a,b} is an integral domain, reduced, quasi-Gorenstein, or satisfies Serre\u2019s conditions

A family of quotients of the Rees algebra

Abstract A family of quotient rings of the Rees algebra associated to a commutative ring is studied. This family generalizes both the classical concept of idealization by Nagata and a more recent concept, the amalgamated duplication of a ring. It is shown that several properties of the rings of this family do not depend on the particular member. MSC: 20M14; 13H10; 13A30

A family of quotients of the Rees Algebra

A family of quotient rings of the Rees algebra associated to a com- mutative ring is studied. This family generalizes both the classical concept of idealization by Nagata and a more recent concept, the amalgamated duplication of a ring. It is shown that several properties of the rings of this family do not depend on the particular member

Families of Gorenstein and Almost Gorenstein Rings

Starting with a commutative ring R and an ideal I, it is possible to define a family of rings R(I)a,b, with a,b∈R, as quotients of the Rees algebra ⊕n≥0Intn; among the rings appearing in this family we find Nagata’s idealization and amalgamated duplication. Many properties of these rings depend only on R and I and not on a, b; in this paper we show that the Gorenstein and the almost Gorenstein properties are independent of a, b. More precisely, we characterize when the rings in the family are Gorenstein, complete intersection, or almost Gorenstein and we find a formula for the type

Families of Gorenstein and almost Gorenstein rings

Starting with a commutative ring R and an ideal I, it is possible to define a family of rings R(I)_{a,b}, with a, b 08R, as quotients of the Rees algebra 95_{n 650} I^n t^n; among the rings appearing in this family we find Nagata\u2019s idealization and amalgamated duplication. Many properties of these rings depend only on R and I and not on a, b; in this paper we show that the Gorenstein and the almost Gorenstein properties are independent of a, b. More precisely, we characterize when the rings in the family are Gorenstein, complete intersection, or almost Gorenstein and we find a formula for the type