oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

3 ( 1 )

2019 ( 3 )

2018 ( 1 )

2017 ( 2 )

Custom range...

Search Results: 1 - 10 of 2130 matches for " Salvatore Messina "
All listed articles are free for downloading (OA Articles)
Page 1 /2130
Display every page Item
Hypophosphatemic osteomalacia associated with tenofovir: a multidisciplinary approach is required.
Giuseppe Vittorio De Socio,Gianluigi Fabbriciani,Marco Massarotti,Salvatore Messina
Mediterranean Journal of Hematology and Infectious Diseases , 2012, DOI: 10.4084/mjhid.2012.
Abstract: Tenofovir is widely used as first-line treatment of HIV infection, although its use is sometimes complicated by a reversible proximal renal tubulopathy. We report the case of a 45-year-old woman with chronic HIV infection and personality disorder, who after 12 months of tenofovir, complained of fatigue, diffuse bone pain and gait disturbances. The elevated level of alkaline phosphatase, hypophosphatemia and inappropriate phosphaturia suggested the diagnosis of hypophosphatemic osteomalacia secondary to proximal renal tubulopathy. A dual-energy x-ray absorptiometry showed a bone mineral density below the expected range for age (lumbar spine Z-score -3.3, femoral neck Z-score -2.1). A whole body 99mTc-methylene diphosphonate bone scan showed multiple areas of increased focal activity in the lumbar and thoracic spine and in sacroiliac and hip joints consistent with pseudo-fractures. Two months after tenofovir discontinuation and administration of vitamin D and phosphate, osteomalacia-related symptoms disappeared. Eleven months later, bone and mineral metabolism data were normal and bone scintigraphy did not show any pathological findings. This report highlights the importance of considering the diagnosis of osteomalacia in patients treated with tenofovir and emphasizes the need for monitoring alkaline phosphatase, blood and urinary phosphate and creatinine, especially in patients with risk factors for bone disease.
Antibacterial properties of auraptene and oxyprenylated naturally occurring benzoic and cinnamic acids
Massimo CURINI,Francesco EPIFANO,Federica MESSINA,Salvatore GENOVESE
Boletín Latinoamericano y del Caribe de Plantas Medicinales y Aromáticas , 2012,
Abstract: La actividad antibacteriana in vitro del auraptene y de cuatro ácidos preniloxycinámicos y benzoicos ha sido evaluada sobre un grupo de tres distintas cepas bacterianas. Todos los compuestos mostraron ser activos como agentes inhibitorios del crecimiento del Staphylococcus Aureus.
Casimir-Polder forces, boundary conditions and fluctuations
Riccardo Messina,Roberto Passante,Lucia Rizzuto,Salvatore Spagnolo,Ruggero Vasile
Physics , 2012, DOI: 10.1088/1751-8113/41/16/164031
Abstract: We review different aspects of the atom-atom and atom-wall Casimir-Polder forces. We first discuss the role of a boundary condition on the interatomic Casimir-Polder potential between two ground-state atoms, and give a physically transparent interpretation of the results in terms of vacuum fluctuations and image atomic dipoles. We then discuss the known atom-wall Casimir-Polder force for ground- and excited-state atoms, using a different method which is also suited for extension to time-dependent situations. Finally, we consider the fluctuation of the Casimir-Polder force between a ground-state atom and a conducting wall, and discuss possible observation of this force fluctuation.
The Italian ZECOMIX Platform: CO2 Capture on Calcined Dolomite in Fluidized Bed Carbonator Unit  [PDF]
Silvera Scaccia, Stefano Stendardo, Giuseppina Vanga, Leandro Pagliari, Stefano Cassani, Mirko Nobili, Giuseppe Messina, Andrea Assettati, Giuliano Guidarelli, Salvatore Attanasi, Caterino Stringola, Andrea Grasso, Ivano Cassani, Antonio Calabró, Pier Ugo Foscolo
Natural Resources (NR) , 2014, DOI: 10.4236/nr.2014.59040
Abstract:
The Italian Zecomix platform is a gasification pilot-scale plant integrated CCS technology, whose flexibility allows operating each unit alone. For quantitative analysis of the gaseous species an analytical system based on commercially available instruments and sampling lines at various points of plant was properly designed. A Fourier Transform Infrared Spectrometric (FTIR) with portable low resolution and gas chromatographic tools were used. The fluidized bed calciner/ carbonator unit was fed with naturally occurring dolomite (about 300 kg) from quarry of Biella (Italy) and tested for CO2 capture. Carbonation reaction was conducted at around 700°C under simulated reformed synthesis gas containing 30% of CO2. Based on GC and FTIR results a CO2 retention better than 70% was achieved. The application of grain model establishing the carbonation reaction was kinetically controlled within 50 seconds and the reaction rate constant was comparable to that obtained at laboratory-scale level by thermogravimetric analyzer.
Multiple Sclerosis in the Mount Etna Region: Possible Role of Volcanogenic Trace Elements
Alessandra Nicoletti, Elisa Bruno, Martina Nania, Edoardo Cicero, Silvia Messina, Clara Chisari, Josita Torrisi, Davide Maimone, Roberto Marziolo, Salvatore Lo Fermo, Francesco Patti, Salvatore Giammanco, Mario Zappia
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0074259
Abstract: Background Trace elements have been hypothesised to be involved in the pathogenesis of Multiple Sclerosis and volcanic degassing is the major natural sources of trace elements. Both incidence of Multiple Sclerosis in Catania and volcanic activity of Mount Etna have been significantly increased during the last 30 years. Due to prevailing trade winds direction, volcanic gases from Etna summit craters are mostly blown towards the eastern and southern sectors of the volcano. Objective To evaluate the possible association between Multiple Sclerosis and exposure to volcanogenic trace elements. Methods We evaluated prevalence and incidence of Multiple Sclerosis in four communities (47,234 inhabitants) located in the eastern flank and in two communities (52,210 inhabitants) located in the western flank of Mount Etna, respectively the most and least exposed area to crater gas emissions. Results A higher prevalence was found in the population of the eastern flank compared to the population of the western one (137.6/100,000 versus 94.3/100,000; p-value 0.04). We found a borderline significantly higher incidence risk during the incidence study period (1980–2009) in the population of the eastern flank 4.6/100,000 (95% CI 3.1–5.9), compared with the western population 3.2/100,000 (95% CI 2.4–4.2) with a RR of 1.41 (95% CI 0.97–2.05; p-value 0.06). Incidence risks have increased over the time in both populations reaching a peak of 6.4/100,000 in the eastern flank and of 4.4/100.000 in the western flank during 2000–2009. Conclusion We found a higher prevalence and incidence of Multiple Sclerosis among populations living in the eastern flank of Mount Etna. According to our data a possible role of TE cannot be ruled out as possible co-factor in the MS pathogenesis. However larger epidemiological study are needed to confirm this hypothesis.
Group Dynamics in On-Line and Face-to-Face Interactions: An Experimental Study on Learning Methods  [PDF]
Sergio Severino, Roberta Messina
Sociology Mind (SM) , 2011, DOI: 10.4236/sm.2011.12008
Abstract: Organizing in groups does not represent an objective definition, but rather a way to better understand the mean-ing of plurality. At the same time modern technologies modify perceptive and cognitive transformation. This re-search shows that on-line groups develop objective dynamics in face-to-face groups; it evaluates the quality of the University student services and studies the dynamics of the creation of face-to-face and on-line groups. Stu-dents were divided into experimental on-line (forum, chat, newsgroup) and face-to-face encounters (seminars, laboratories). The two level analyses show the defence mechanisms, the lack of socialization attitudes and the tolerance of differences that characterized on-line groups. The new technologies open new horizons and cogni-tive functions.
The Role of Soy in Vegetarian Diets
Mark Messina,Virginia Messina
Nutrients , 2010, DOI: 10.3390/nu2080855
Abstract: Soyfoods have long been prized among vegetarians for both their high protein content and versatility. Soybeans differ markedly in macronutrient content from other legumes, being much higher in fat and protein, and lower in carbohydrate. In recent years however, soyfoods and specific soybean constituents, especially isoflavones, have been the subject of an impressive amount of research. Nearly 2,000 soy-related papers are published annually. This research has focused primarily on the benefits that soyfoods may provide independent of their nutrient content. There is particular interest in the role that soyfoods have in reducing risk of heart disease, osteoporosis and certain forms of cancer. However, the estrogen-like effects of isoflavones observed in animal studies have also raised concerns about potential harmful effects of soyfood consumption. This review addresses questions related to soy and chronic disease risk, provides recommendations for optimal intakes, and discusses potential contraindications. As reviewed, the evidence indicates that, with the exception of those individuals allergic to soy protein, soyfoods can play a beneficial role in the diets of vegetarians. Concerns about adverse effects are not supported by the clinical or epidemiologic literature. Based on the soy intake associated with health benefits in the epidemiologic studies and the benefits noted in clinical trials, optimal adult soy intake would appear to be between two and four servings per day.
Revisiting a Celebrated Bakerian Lecture  [PDF]
Salvatore Ganci
Optics and Photonics Journal (OPJ) , 2019, DOI: 10.4236/opj.2019.94005
Abstract: This paper revisits the optical contributions of Thomas Young to the theory of diffraction and, in particular, some experiments presented in his celebrated “Bakerian Lecture” of 1803. The major input to re-analyze some of Young’s experiments came by a recent paper appeared on an instructional and pedagogical journal. Diffraction experiments of Thomas Young are here revisited with particular reference to the coherence requirements of the white light source to see and measure diffraction fringes by pins, and in general to consider the difficulties in working in a “camera obscura”. If at the beginning of the nineteenth century, the experiments of Optics in a darkroom were considered “simple”, however they needed rooms about 7 meters long, completely darkened out, with a window mostly exposed to south, a darkened window and a small hole practiced on a dark sheet applied to a hole in the window shutter. Often a heliostat should be placed outside and a mirror inside the room to direct the cone of sunlight. Thomas Young worked only with a mirror interior to the darkened room in order to have a cone of light horizontally directed and moving the mirror at each observation. Today, these requirements are not easy to implement. However, only a single measure by Thomas Young will be repeated under his own conditions with a “reduced darkroom” using internally blackened cardboard tubes.
Measurement of the W + jet cross section at CDF
Messina, Andrea;,;
Brazilian Journal of Physics , 2007, DOI: 10.1590/S0103-97332007000500043
Abstract: a measurement of w ? en + n-jet cross sections in p$\bar{p}$ collisions at ?s = 1.96 tev using the collider detector at fermilab in run ii is presented. the measurement is based on an integrated luminosity of 320 pb-1, and includes events with jet multiplicity from > 1 to > 4. in each jet multiplicity sample the differential and cumulative cross sections with respect to the transverse energy of the nth-leading jet are measured. for w+ > 2 jets the differential cross section with respect to the 2-leading jets invariant mass mj1j2 and angular separation drj1j2 is also reported. the data are compared to predictions from monte carlo simulations.
Mudan?a e inova??o educacional: notas para reflex?o
Messina, Graciela;
Cadernos de Pesquisa , 2001, DOI: 10.1590/S0100-15742001000300010
Abstract: this is part of a serie of essays written for the educational innovations project developed by unesco with different countries of the region. these essays attempt to shed light on the different meanings that can be attributed to the concept of innovation, in order to make possible for the groups involved with the theme to establish a group of theoretical references by consensus to serve as landmarks in the choice and analysis of experiences of effective change in educational practices.
Page 1 /2130
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.