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Search Results: 1 - 10 of 359769 matches for " G. L. Radici "
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The Recurrent Vulvovaginal Candidiasis: Proposal of a Personalized Therapeutic Protocol
F. Murina,A. Graziottin,R. Felice,G. L. Radici,S. Di Francesco
ISRN Obstetrics and Gynecology , 2011, DOI: 10.5402/2011/806065
Abstract: Background. Recurrent vulvovaginal candidiasis (RVC) is an increasing challenge in clinical practice. Objective. The purpose of this study was to reduce the episodes of RVC through the intake of fluconazole 200?mg/dose with a personalized regimen at growing administration intervals with a probiotic. Method. 55 patients received a 200?mg fluconazole as an induction dose for 3 alternate days. Symptoms resolution after 10–14 days made the patients eligible to continue with a maintenance therapy of fluconazole weekly for one month, followed by 200?mg after 10, 15, 20 and 30 days. Patients were allowed to move on to the next level of maintenance therapy only if they were symptom free. Patients were also given a probiotic with Beta Glucan and Echinacea Purpurea. Results. Among the 55 patients enrolled, four (7%) have withdrawn after the induction phase. 51 patients completed the whole therapeutic maintenance period, and eight (15,6%) experienced a recurrence before the end of the therapy. Five women (9,8%) relapsed (two after 2 months and three after 6 months). Conclusion. The positive results of our study prove the effectiveness of an individualized protocol for a rather short period, with a slowly decreasing administration of fluconazole + probiotic. 1. Introduction The mycotic vulvovaginitis is a common infection. It is estimated that about 75% of women will experience this infection at least once during their life time. In 15% of these cases the mycotic infection may evolve in a “cyclic recurrent type” (RVC) defined as four or more episodes of mycotic vulvovaginitis during one year [1, 2]. Over 85% of cases are caused by Candida Albicans, while Candida Tropicalis and Glabrata are more common in diabetic women. The VVC has a negative effect on women’s personal confidence and self-esteem [3]. It may cause or contribute to psycosexual problems, namely, introital dyspareunia, with progressive loss of genital arousal (pain is the strongest reflex inhibitor of vaginal congestion and lubrication), secondary loss of desire, and avoidance of sexual intimacy for fear of experiencing pain and recurrence of another Candida vulvovaginitis. It may as well cause discomfort, uneasiness, sense of shame, or unworthiness in informing both doctor and partner about the inconveniences of such a recurring infection. An antimycotic prophylaxis with fluconazole for long periods of time has proven to be effective for the prevention of mycotic recurrent episodes. The oral weekly administration of a single dose of 150?mg of fluconazole for a period of 6 months proved to be
Transversity and inclusive two-pion production
Radici, Marco
High Energy Physics - Phenomenology , 2007, DOI: 10.1063/1.2750865
Abstract: A model for dihadron fragmentation functions is briefly outlined, that describes the fragmentation of a quark in two unpolarized hadrons. The parameters are tuned to the output of the PYTHIA event generator for two-hadron semi-inclusive production in deep inelastic scattering at HERMES. Then, predictions are made for the unknown polarized fragmentation function and the related single-spin asymmetry in the azimuthal distribution of $\pi^+ \pi^-$ pairs in semi-inclusive deep inelastic scattering on transversely polarized targets at HERMES and COMPASS. This asymmetry can be used to extract the quark transversity distribution.
Elastic Form Factors in Point-form Approach
M. Radici
Physics , 2000,
Abstract: Using the point-form approach to relativistic quantum mechanics, a covariant framework is presented for the calculation of proton and neutron electromagnetic form factors. Results for charge radii, magnetic moments, and electric as well as magnetic form factors are produced using the wave functions obtained in the so-called Goldstone-boson-exchange constituent quark model. All the predictions are found in remarkable agreement with existing experimental data.
Interference fragmentation functions and spin asymmetries
M. Radici
Physics , 2001, DOI: 10.1142/9789812778345_0091
Abstract: A new class of fragmentation functions, arising from the interference of different hadron production channels, is analyzed. Their symmetry properties with respect to naive time-reversal transformations allow for the exploration of final-state interactions occurring during and after the hadronization. Their symmetry properties with respect to chiral transformations allow building spin asymmetries where the quark transversity distribution can be factorized out at leading twist. Explicit calculations will be shown for the interference fragmentation functions arising from final-state interactions of two pions detected in the same current jet for the case of semi-inclusive Deep-Inelastic Scattering (DIS).
T-odd fragmentation functions
M. Radici
Physics , 2001, DOI: 10.1016/S0375-9474(01)01483-X
Abstract: We discuss the properties of fragmentation functions arising from the interference of two leading hadrons produced inside the same jet in the current fragmentation region of a hard process. For the case of semi-inclusive Deep Inelastic Scattering (DIS), a proper folding of the cross section, integrated over the azimuthal position of the detected hadrons, produces a factorized form that allows for the extraction of the quark transversity distribution at leading twist. Using an extended spectator model, explicit calculations are shown for the hadron pair being two pions with invariant mass inside the $\rho$ resonance width.
Two-hadron Inclusive DIS and Interference Fragmentation Functions
Marco Radici
Physics , 1999,
Abstract: We investigate the properties of interference fragmentation functions arising from the emission of two leading hadrons inside the same jet for semi-inclusive lepton-nucleon deep-inelastic scattering. Using an extended spectator model we give numerical estimates for the example of the fragmentation into a proton-pion pair with its invariant mass on the Roper resonance.
Realistic estimate of valence transversity from dihadron production
Marco Radici
Physics , 2015,
Abstract: We have updated our extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. The most recent COMPASS data for proton and deuteron targets, complemented by previous HERMES data on the proton, make it possible to perform a flavor separation of the valence components of the transversity distribution, using di-hadron fragmentation functions taken from the semi-inclusive production of two pion pairs in back-to-back jets in $e^+ e^-$ annihilation. The $e^+ e^-$ data from BELLE have been reanalyzed to reach a more realistic estimate of the uncertainties on the chiral-odd interference fragmentation function. Our results represent the most accurate estimate of the uncertainties on the valence components of the transversity distribution currently available.
Effects of TMD evolution and partonic flavor on $e^+e^-$ annihilation into hadrons
Alessandro Bacchetta,Miguel G. Echevarria,Piet J. G. Mulders,Marco Radici,Andrea Signori
Physics , 2015,
Abstract: We calculate the transverse momentum dependence in the production of two back-to-back hadrons in electron-positron annihilations at the medium/large energy scales of BES-III and BELLE experiments. We use the parameters of the transverse-momentum-dependent (TMD) fragmentation functions that were recently extracted from the semi-inclusive deep-inelastic-scattering multiplicities at low energy from HERMES. TMD evolution is applied according to different approaches and using different parameters for the nonperturbative part of the evolution kernel, thus exploring the sensitivity of our results to these different choices and to the flavor dependence of parton fragmentation functions. We discuss how experimental measurements could discriminate among the various scenarios.
Covariant axial form factor of the nucleon in a chiral constituent quark model
L. Ya. Glozman,M. Radici,R. F. Wagenbrunn,S. Boffi,W. Klink,W. Plessas
Physics , 2001, DOI: 10.1016/S0370-2693(01)00915-7
Abstract: The axial form factor G_A of the nucleon is investigated for the Goldstone-boson-exchange constituent quark model using the point-form approach to relativistic quantum mechanics. The results, being covariant, show large contributions from relativistic boost effects. The predictions are obtained directly from the quark-model wave functions, without any further input such as vertex or constituent-quark form factors, and fall remarkably close to the available experimental data.
Nuclear transparency in quasielastic A(e,e'p): intranuclear cascade versus eikonal approximation
Ye. S. Golubeva,L. A. Kondratyuk,A. Bianconi,S. Boffi,M. Radici
Physics , 1997, DOI: 10.1103/PhysRevC.57.2618
Abstract: The problem of nuclear propagation through the nuclear medium in quasielastic A(e,e'p) reactions is discussed in the kinematic range 1
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