OALib Journal期刊

ISSN: 2333-9721



匹配条件: “Petracci” ,找到相关结果约27条。
Universal representations of Lie algebras by coderivations
Emanuela Petracci
Mathematics , 2003,
Abstract: A class of representations of a Lie superalgebra (over a commutative superring) in its symmetric algebra is studied. As an application we get a direct and natural proof of a strong form of the Poincare'-Birkhoff-Witt theorem, extending this theorem to a class of nilpotent Lie superalgebras. Other applications are presented. Our results are new already for Lie algebras.
Muscle Growth and Poultry Meat Quality Issues
Massimiliano Petracci,Claudio Cavani
Nutrients , 2012, DOI: 10.3390/nu4010001
Abstract: Over the past 50 years the worldwide growing demand of poultry meat has resulted in pressure on breeders, nutritionists and growers to increase the growth rate of birds, feed efficiency, size of breast muscle and reduction in abdominal fatness. Moreover, the shift toward further processed products has emphasized the necessity for higher standards in poultry meat to improve sensory characteristics and functional properties. It is believed that genetic progress has put more stress on the growing bird and it has resulted in histological and biochemical modifications of the muscle tissue by impairing some meat quality traits. The most current poultry meat quality concerns are associated with deep pectoral muscle disease and white striping which impair product appearance, and increased occurrence of problems related with the meat’s poor ability to hold water during processing and storage (PSE-like condition) as well as poor toughness and cohesiveness related to immaturity of intramuscular connective tissue. This paper is aimed at making a general statement of recent studies focusing on the relationship between muscle growth and meat quality issues in poultry.
Opiniones y representaciones sociales de varones sobre aborto en Buenos Aires, Argentina
Petracci, Mónica;
Sexualidad, Salud y Sociedad (Rio de Janeiro) , 2011, DOI: 10.1590/S1984-64872011000300002
Abstract: this article is based on a qualitative study of men's opinions and social representations about abortion, consisting of thirty interviews with men 25 to 39 years old in the city of buenos aires, argentina. the main findings support previous results and provide new knowledge on the subject. they corroborate the ambivalence of discourses on abortion: an opinion in favor of de-criminalizing abortion prevailed, together with a social representation based on the moral opposition to it. in conclusion, there is a need for further studies of men's opinions about women's and men's rights, as well qualitative studies about social representations to complement public opinion surveys in the field of sexual and reproductive rights.
Symmetric pairs and Gorelik elements
Michel Duflo,Emanuela Petracci
Mathematics , 2007,
Abstract: The second author gave a formula for the elements of the enveloping algebra of a Lie superalgebra defined by Gorelik under an appropriate unimodularity assumption. We show that this formula is a particular case of a formula for the Jacobian of the exponential map of a symmetric superspace.
Uniqueness in the Kashiwara-Vergne conjecture
Anton Alekseev,Emanuela Petracci
Mathematics , 2005,
Abstract: We prove that a universal symmetric solution of the Kashiwara-Vergne conjecture is unique up to order one. in the Appendix by the second author, this result is used to show that solutions of the Kashiwara-Vergne conjecture for quadratic Lie algebras existing in the literature are not universal.
On the quantum periods of del Pezzo surfaces with $\frac{1}{3}(1,1)$ singularities
Alessandro Oneto,Andrea Petracci
Mathematics , 2015,
Abstract: In earlier joint work with our collaborators Akhtar, Coates, Corti, Heuberger, Kasprzyk, Prince and Tveiten, we gave a conjectural classification of a broad class of orbifold del Pezzo surfaces, using Mirror Symmetry. We proposed that del Pezzo surfaces $X$ with isolated cyclic quotient singularities such that $X$ admits a $\mathbb{Q}$-Gorenstein toric degeneration correspond under Mirror Symmetry to maximally mutable Laurent polynomials $f$ in two variables, and that the quantum period of such a surface $X$, which is a generating function for Gromov-Witten invariants of $X$, coincides with the classical period of its mirror partner $f$. In this paper, we prove a large part of this conjecture for del Pezzo surfaces with $\frac{1}{3}(1,1)$ singularities, by computing many of the quantum periods involved. Our tools are the Quantum Lefschetz theorem and the Abelian/non-Abelian Correspondence; our main results are contingent on, and give strong evidence for, conjectural generalizations of these results to the orbifold setting.
Comparison between the Quality Traits of Phosphate and Bicarbonate-Marinated Chicken Breast Fillets Cooked under Different Heat Treatments  [PDF]
Samer Mudalal, Massimiliano Petracci, Silvia Tappi, Pietro Rocculi, Claudio Cavani
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.51005

Because the use of phosphates has being recently diminished in meat industry due to the nutritional drawbacks of phosphates, some researchers started to evaluate sodium bicarbonate as phosphate replacer in meat products. The aim of this study was to evaluate the effect of different temperature combinations of dry air-cooking treatments (Air and Core temperatures: 160 - 76, 160 - 80, 200 - 76 and 200℃ - 80℃, respectively) on chemical composition, texture properties, water activity, freezable water and bound water, color, pH, and water binding capacity of phosphate and bicarbonate-marinated chicken breast. A batch of 24 h post-mortem broiler breast meat of 80 fillets was divided into two groups of marination treatments (0.3% sodium bicarbonate n = 40, 0.3% sodium tripolyphosphate n = 40) and was vacuum tumbled (45 min, ?0.95 mbar, 20 rpm). Different temperature-combinations cooking treatments significantly modified the chemical composition. Bicarbonate marinated fillets showed higher ability to retain water (67.3% vs. 65.7%, P < 0.05) during severe heat treatment and lower cook losses (30.7% vs. 33.4%, P < 0.05) when compared with phosphate-marinated fillets. The effect of changing the cooking temperatures on Texture Profile Analysis (hardness, cohesiveness, gumminess, springiness, and chewiness) was more tangible in phosphate marinated fillets than bicarbonate. Bicarbonate-marinated fillets showed significant differences in the percentage of bound water, latent heat, and water activity after cooking in comparison to phosphate-marinated fillets. The results of this study revealed that phosphate-marinated fillets interacted with heat treatments in different patterns in comparison with bicarbonate-marinated fillets.

Derechos humanos y sexualidad en la Argentina
Pecheny, Mario;Petracci, Mónica;
Horizontes Antropológicos , 2006, DOI: 10.1590/S0104-71832006000200003
Abstract: this paper presents an overview of the situation concerning the rights related to sexuality in contemporary argentina. based specially on the positive legislation, it is primarily presented a synthesis of the legal and political system. next, the paper summarizes the process of inclusion of the sexual rights, mainly since 1983, when democracy has been recovered. the following issues are addressed: civil equality and conjugality; sexual orientation and gender identity; reproduction; abortion; gender a sexual violence; hiv/aids; and exploitation and sexual work. the paper ends with a consideration about the still remaining doubts.
Development of Rabbit Meat Products Fortified With n-3 Polyunsaturated Fatty Acids
Massimiliano Petracci,Maurizio Bianchi,Claudio Cavani
Nutrients , 2009, DOI: 10.3390/nu1020111
Abstract: Rabbit meat is a highly digestible, tasty, low-calorie food, often recommended by nutritionists over other meats. Currently research in the rabbit sector is interested in developing feeding strategies aiming to further increase the nutritional value of rabbit meat as a “functional food” by including n-3 polyunsaturated fatty acids (n-3 PUFA), conjugated linoleic acid (CLA), vitamins and antioxidants in rabbit diets and assessing their effects on both raw and stored/processed meat quality properties. Our recent studies indicate that the dietary inclusion from 3 to 6% of linseed might be considered as a way to achieve the enrichment of the meat with α-linolenic acid and to guarantee satisfactory product stability during further processing and storage. Considering that 6% dietary linseed corresponds to a n-3 PUFA content of 8.5% of the total fatty acids and a lipid content of 4.7 g/100 g of leg meat, a content of 396 mg n-3 PUFA/100g meat can be estimated, which represents about 19% of the recommended daily allowance (RDA) for n-3 PUFA.
Représentations sociales du harcelement sexuel dans les milieux du travail
Kornblit, A.L.,Petracci, M.
Papers on Social Representations , 1996,

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