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Search Results: 1 - 10 of 31189 matches for " Marco Di;Jacques "
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Pré-tratamentos de mela?o de cana-de-a?úcar e água de macera??o de milho para a bioprodu??o de carotenóides
Valduga, Eunice;Valério, Alexsandra;Treichel, Helen;Luccio, Marco Di;Jacques, Rosangela Assis;Fúrigo Júnior, Agenor;
Química Nova , 2007, DOI: 10.1590/S0100-40422007000800012
Abstract: this work studied the pretreatment of sugarcane molasses (cm) and corn steep liquor (cs) for the production of carotenoids by sporidiobolus salmonicolor (cbs 2636). the acid pretreatment removed less micronutrients than that with activated carbon and led to high removals of cu and mn. reduction in optical density of the prepared medium and removal of glucose from it were 22% and 7% for cm and 95% and 38% for cs, respectively. total carotenoids obtained with substrates pretreated with acids (541 mg/l) were higher than the results obtained when the medium was treated with activated carbon (208 mg/l).
Development and Validation of an Ion Chromatography Method for the Simultaneous Determination of Seven Food Additives in Cheeses  [PDF]
Marco Iammarino, Aurelia Di Taranto
Journal of Analytical Sciences, Methods and Instrumentation (JASMI) , 2013, DOI: 10.4236/jasmi.2013.33A005
Abstract:

Cheeses are characterized by several chemical-physical properties that make it difficult for the microorganisms growth, consequently. The actual European legislation allows the addition of few food additives in this type of food products. In this work, the entire procedure of extraction, purification, chromatographic separations and quali/quantitative determination of seven food additives (sorbic acid, benzoic acid, lactic acid, acetic acid, nitrites, nitrates and phosphates) was developed and applied for the analysis of different types of cheese (mozzarella, cheese spread, semi-hard and hard cheeses). Through validation procedure it was possible to evaluate the most important validation parameters. Extended calibration curves (r > 0.990) were obtained for all the analyzed compounds. Recovery values ranged from 72.8% to 98.4% and a good repeatability was obtained, with precision levels in the range of 0.03% - 0.11% (n = 6). The potential and feasibility of the method were tested by analysing real samples, such as mozzarella, cheese spread, semi-hard and hard cheeses, confirming that the method is well suited to satisfy the demands for accurate confirmation analyses of seven food additives in cheeses, which is especially valuable in official check analyses and in monitoring schemes.

Elective Affinities  [PDF]
Daniela Di Cagno, Emanuela Sciubba, Marco Spallone
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.13028
Abstract: We propose a marriage model where assortative matching results in equilibrium for reasons other than those driving similar results in the search and matching literature. A marriage is a joint venture where husband and wife contribute to the couple’s welfare by allocating their time to portfolios of risky activities. Men and women are characterised by different preferences over risk and the optimal match is between partners with the same level of risk aversion. In our model no two men (women) rank the same woman (men) as most desirable. Given that there is no unanimous ranking of candidates, everyone marries in equilibrium their most preferred partner.
Ettore Majorana and the Theoretical Problem of Photon-Electron Scattering  [PDF]
Marco Di Mauro, Salvatore Esposito, Adele Naddeo
Advances in Historical Studies (AHS) , 2016, DOI: 10.4236/ahs.2016.53011
Abstract: Relevant contributions by Majorana regarding Compton scattering off free or bound electrons are considered in detail, where a (full quantum) generalization of the Kramers-Heisenberg dispersion formula is derived. The role of intermediate electronic states is appropriately pointed out in recovering the standard Klein-Nishina formula (for free electron scattering) by making recourse to a limpid physical scheme alternative to the (then unknown) Feynman diagram approach. For bound electron scattering, a quantitative description of the broadening of the Compton line was obtained for the first time by introducing a finite mean life for the excited state of the electron system. Finally, a generalization aimed to describe Compton scattering assisted by a non-vanishing applied magnetic field is as well considered, revealing its relevance for present day research.
Accuracy and precision of end-expiratory lung-volume measurements by automated nitrogen washout/washin technique in patients with acute respiratory distress syndrome
Jean Dellamonica, Nicolas Lerolle, Cyril Sargentini, Gaetan Beduneau, Fabiano Di Marco, Alain Mercat, Jean-Christophe M Richard, Jean-Luc Diehl, Jordi Mancebo, Jean-Jacques Rouby, Qin Lu, Gilles Bernardin, Laurent Brochard
Critical Care , 2011, DOI: 10.1186/cc10587
Abstract: Thirty-four patients with ARDS were prospectively included in five university-hospital intensive care units. ΔEELV and ΔPEEP volumes were compared between 6 and 15 cm H2O of PEEP.After exclusion of three patients, variability of the nitrogen technique was less than 4%, and the largest difference between measurements was 81 ± 64 ml. ΔEELV and ΔPEEP-volume were only weakly correlated (r2 = 0.47); 95% confidence interval limits, -414 to 608 ml). In four patients with the highest PEEP (≥ 16 cm H2O), ΔEELV was lower than the minimal predicted increase in lung volume, suggesting flawed measurements, possibly due to leaks. Excluding those from the analysis markedly strengthened the correlation between ΔEELV and ΔPEEP volume (r2 = 0.80).In most patients, the EELV technique has good reproducibility and accuracy, even at high PEEP. At high pressures, its accuracy may be limited in case of leaks. The minimal predicted increase in lung volume may help to check for accuracy.In acute lung injury (ALI) and acute respiratory distress syndrome (ARDS), functional residual capacity (FRC) is markedly decreased as a result of numerous factors, including alveolar collapse, pulmonary edema with alveolar flooding, supine position, sedation-induced diaphragm inactivity, and cardiac enlargement [1-5]. Measuring FRC (or end-expiratory lung volume [EELV] when PEEP is applied) might help to measure the aerated lung available for ventilation and to better monitor the effects of ventilation strategies. Reproducible measurement techniques that can be used at the bedside are needed to minimize overdistention and to determine which patients may benefit from recruitment strategies. Repeated CT scans and gas-dilution techniques are two validated methods of lung-volume measurement but are so complex that their use has been confined to research settings. Recently, washout/washin techniques using oxygen [6,7] or nitrogen [8,9] have been made available in ICU ventilators, allowing bedside EELV measurement
O(d,d)-invariance in inhomogeneous string cosmologies with perfect fluid
Jacques Demaret,Elisa Di Pietro
Physics , 1998, DOI: 10.1023/A:1026688610468
Abstract: In the first part of the present paper, we show that O(d,d)-invariance usually known in a homogeneous cosmological background written in terms of proper time can be extended to backgrounds depending on one or several coordinates (which may be any space-like or time-like coordinate(s)). In all cases, the presence of a perfect fluid is taken into account and the equivalent duality transformation in Einstein frame is explicitly given. In the second part, we present several concrete applications to some four-dimensional metrics, including inhomogeneous ones, which illustrate the different duality transformations discussed in the first part. Note that most of the dual solutions given here do not seem to be known in the literature.
Scale-factor duality in string Bianchi cosmologies
Elisa Di Pietro,Jacques Demaret
Physics , 1999, DOI: 10.1142/S0218271899000262
Abstract: We apply the scale factor duality transformations introduced in the context of the effective string theory to the anisotropic Bianchi-type models. We find dual models for all the Bianchi-types [except for types $VIII$ and $IX$] and construct for each of them its explicit form starting from the exact original solution of the field equations. It is emphasized that the dual Bianchi class $B$ models require the loss of the initial homogeneity symmetry of the dilatonic scalar field.
A constant equation of state for quintessence ?
Elisa Di Pietro,Jacques Demaret
Physics , 1999, DOI: 10.1142/S0218271801000779
Abstract: Quintessence is often invoked to explain the universe acceleration suggested by the type Ia supernovae observations. The aim of this letter is to study the validity of using a constant equation of state for quintessence models. We shall show that this hypothesis strongly constraint the form of the scalar potential.
Los movimientos de mujeres en la Argentina y la emergencia del pueblo feminista
Di Marco,Graciela;
La aljaba , 2010,
Abstract: this article proposes the analysis about the process of construction of the feminist people, notion that refers to the chain of equivalencies allowed the emergence of a people beyond feminism, but which it is a nodal point. the feminist people opposed to integral catholicism and aims to a deeper and more democracy secularism. takes into account the development of the women movements in argentina since the return of democracy in 1983, and the position of the institutional roman catholic church regarding the rights of women, with their particular formation in argentina, where, as in most latin american countries, exerts dominance and influence over the state, society and culture. catholic discourse of sexuality is answered in a society declared mostly catholic, but where the people practice their freedom of conscience and expression outside of any dogmatism. the pueblo feminist is a new articulation of popular identities that are a potential alternative for reflection on contemporary social transformations.
Tecla di Iconio e le donne alla finestra
Francesca Di Marco
Storia delle Donne , 2007,
Abstract: An apocryphal tale, the Acta Pauli et Theclae, tells that at the beginning of the Christian Era, a young girl, Thecla, peeping at her window hears Paul the Apostle preaching and is converted to Christianity. Has Thecla’s attitude a specific significance in the tale? And how was evaluated a woman staying at a window in the ancient world? The article searches for an answer to these questions through the analysis of episodes representing women at the window in the Old Testament and in Greek and Latin literature.
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