232 research outputs found
Choosing the Best Candidates for Penile Rehabilitation after Bilateral Nerve-Sparing Radical Prostatectomy
No full textIntroduction. Controversy exists regarding the ideal candidates for penile rehabilitation after bilateral nerve-sparing radical prostatectomy (BNSRP). Aim. To test the effect of penile rehabilitation according to preoperative patient characteristics. Methods. We included 435 consecutive patients treated with BNSRP between 2004 and 2008. Preoperative age, International Index of Erectile Function (IIEF) and Charlson Comorbidity Index (CCI) were used to subdivide patients into three groups according to foreseen risk of erectile dysfunction (ED) after surgery: low (age = 26, CCI = 70 or IIEF-EF = 22. Results. No difference in terms of EF recovery was found between patients receiving on-demand vs. daily PDE5-I (P = 0.09) in the overall population. Similarly, comparable efficacy of the two treatment schedules (on-demand vs. chronic) was demonstrated in patients with low and high risk of ED (all P < 0.8). Conversely, daily therapy with PDE5-I showed significantly higher efficacy for the EF recovery rate compared with the on-demand PDE5-I administration schedule in patients with intermediate risk of ED (3-year EF recovery: 74% vs. 52%, respectively; P = 0.02). Conclusion. The ideal candidates for penile rehabilitation after surgery are patients at intermediate risk of ED. Briganti A, Di Trapani E, Abdollah F, Gallina A, Suardi N, Capitanio U, Tutolo M, Passoni N, Salonia A, DiGirolamo V, Colombo R, Guazzoni G, Rigatti P, and Montorsi F. Choosing the best candidates for penile rehabilitation after bilateral nerve-sparing radical prostatectomy. J Sex Med 2012;9:608-617
Supplemental material for Capillary pressure–saturation curves of thin hydrophilic fibrous layers: effects of overburden pressure, number of layers, and multiple imbibition–drainage cycles
No full textSupplemental Material for Capillary pressure–saturation curves of thin hydrophilic fibrous layers: effects of overburden pressure, number of layers, and multiple imbibition–drainage cycles by Amir Hossein Tavangarrad, S. Majid Hassanizadeh, Rodrigo Rosati, Luigi Digirolamo and Martinus Th van Genuchten in Textile Research Journal</p
Lidar observations of the stratospheric aerosol layer over southern Italy in the period 1991-1995
No full textLidar measurements of the stratospheric aerosol layer have been carried out in Napoli (40°50' N-14°10' E) and Potenza (40°36' N-15°44' E) during the period 1991–1995, covering the history of the aerosol cloud produced by the eruption of Mount Pinatubo (June 1991, Philippines). Measurements are expressed in terms of aerosol backscattering coefficient β A (z), aerosol integrated backscattering IB and aerosol optical thickness τ A at λ = 351 nm and 355 nm; β A and τ A are determined from a single-wavelength elastic return. IB, τ A , and βmax, the peak aerosol backscattering, reached their maximum value in December 1991, displaying a subsequent decay with e-folding times of 237 ± 25, 250 ± 111, and 257 ± 33 days, respectively, R max, the peak scattering ratio, is characterized by adecay time of 235 ± 13 days. Measurements of the extinction-to-backscattering ratio, α A (z)/β A (z), and of the column parameter, τ A /IB, allowed us to retrieve aerosol dimensional characteristics. The time evolution of the height, zc , of the aerosol cloud center of mass was also determined. Downward gravitational settling of stratospheric aerosols with time suggests aerosol particles fall within the size range 0.1–0.3 μm. An abrupt change in IB and βmax is observed approximately 1000 days after the eruption as a result of the winter-summer transition and the tropospheric removal of the lower portion of the stratospheric aerosol layer. Changes in the values of IB, τ A /IB, and zc suggest that this transition is characterized by a change in the aerosol mean radius from 0.3 to 0.1 μm
Lidar observations of polar stratospheric clouds at the South Pole .1. Stratospheric unperturbed conditions, 1990
No full textSTUDY OF A POSSIBLE SCINTILLATING-FIBER TRACKER AT THE LHC AND TESTS OF SCINTILLATING FIBERS
No full textWe present a possible scheme for a scintillating fibre tracker that could be used at the LHC in the central pseudorapidity region. The experimental environment at the LHC was simulated in detail by a Monte Carlo program using the GEANT package. We shall discuss the expected performance of the proposed tracker, mainly for electron identification. We also report on the results of laboratory measurements of scintillating fibre characteristics: we measured the time response, the light yield, the attenuation length and the light propagation speed in individual fibres, looking for the best candidates for the LHC
Organometallic nickel catalysts anchored on polymeric matrices in the oligomerization of olefins. Part II: Effect and role of the components of the catalytic system
No full textOrganometallic nickel complexes with bidentate (PO)-O-boolean AND chelating ligands of ylidic (-C(O)H=PPh(3)) and phosphino-acetic (-CH(PPh(3))-COOH) type heterogenized on polystyrene resins by anchoring through the carbon atom of the ligand have been prepared and used in the polymerization and/or oligomerization of ethylene. Their catalytic behaviour has been compared with those of corresponding homogeneous models and with heterogeneous species with the phosphine and oxygenated ligand bound in a non-chelated arrangement. The catalytic activity and selectivity are strongly dependent on the chelating strength of the ligand. The polymerization of ethylene to HDPE occurs with replica of the support morphology. The role of the ancillary ligand (phosphine, nitrogen bases, etc.) added to the systems has also been studied and clarified
The LITE correlative measurements campaign in southern Italy: Preliminary results
No full textIn conjunction with the LITE mission an intensive LIDAR measurement campaign was carried out in Napoli (40 degrees 50'N-14 degrees 10'E, at sea level) and Potenza (40 degrees 36'N-15 degrees 44'E, 820 m a.s.l.). The LITE experiment, flying on board the Space Shuttle in the period September 10-19, 1994, represents the first attempt to perform global coverage LIDAR measurements from space. The LITE experiment was planned to provide measurements of clouds, tropospheric and stratospheric aerosols, stratospheric temperature and density, characteristics of the planetary boundary level as well as surface albedo. Because of the relative distance between LITE ground tracks and the two southern Italy validation stations for all passes, measurements carried out in Napoli and Potenza were primarily aimed at validation of LITE stratospheric measurements. In the present preliminary analysis Potenza LIDAR measurements in coincidence with the orbit 128 LITE overpass, are reported and discussed. Potenza LIDAR data show a good agreement with LITE data in terms of aerosol scattering ratio both at 355 nm and 532 nm (R-A,R-355 and R-A,R-532); the two data sets appearing to be highly correlated, LITE vs, Potenza LIDAR measurements of R-A,R-355 and R-A,R-532 display a correlation coefficient of 0.72 and 0.86, respectively. Stratospheric aerosol dimensional characteristics are determined starting from the measured values of the Angstrom coefficient
Lidar observations of polar stratospheric clouds at the South Pole .2. Stratospheric perturbed conditions, 1992 and 1993
No full textObservations of polar stratospheric clouds (PSCs), carried out at the Amundsen Scott South Pole Station by lidar from May 1992 through October 1993, are reported and compared with previously obtained results. At that time the Antarctic stratosphere was loaded with sulfuric acid aerosol due to the eruptions of Mount Pinatubo, primarily, and of Mount Hudson. The seasonal evolution of the backscatter profiles has been investigated in relation to the presence of the volcanic aerosol and to the processes of PSC formation, particle sedimentation, and dehydration. During the first winter after the eruptions the PSC activity was more intense than in the following year, particularly above 12.5 km, where the amount of volcanic aerosol was larger in 1992 than in 1993. At lower altitudes the volcanic aerosol loading as well as the PSC phenomenon were comparable during the 2 years. No substantial changes in the signal due to the volcanic aerosol has been observed comparing the backscattering profiles before and after the PSC periods (June–September), except for a downward shift, attributed to the subsidence of the air inside the polar vortex. It is concluded that only a small fraction of the aerosol particles, probably those with the largest radii, were involved in the nucleation of PSC particles
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