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Search Results: 1 - 10 of 412893 matches for " Anna M. Fioretti "
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Chemical composition as a criterion in identifying tourmalines from the Ravne pegmatite and surrounding metapelites, Slovenia
Petra Souvent,Anna M. Fioretti,Giuliano Bellieni,Tadej Dolenec
Geologija , 2000,
Abstract:
Análisis Multivariado Aplicado a la Etapa de Deshidratación en la Técnica de Plastinación del Ri ón de Caballo Multivaried Analysis Applied at the Stage of Dehydration in the Plastination Technique in Horse′s Kidney
M. C Rivera,F Bonino,C Fioretti,M Galán
International Journal of Morphology , 2009,
Abstract: La Plastinación es la técnica más moderna para la conservación de piezas anatómicas y especímenes. Esta técnica consta de cuatro etapas: fijación, deshidratación, impregnación forzada y curado. Este trabajo pretende mejorar la eficiencia en la producción de órganos plastinados mediante la técnica de Plastinación estándar denominada S 10. Se utilizaron ri ones de equinos mestizos criollos provenientes del Frigorífico Aimar S/A, ubicado en la zona rural de Río Cuarto. Luego de realizar la fijación del órgano con formalina se procedió a deshidratarlo. La deshidratación se llevó a cabo en tres sub-etapas donde en cada una de ellas se trabajó a la misma temperatura y se utilizó como solvente una solución de acetona en diferentes concentraciones. Las mediciones se realizaron con acetómetro registrándose el tiempo insumido para lograr la deshidratación. Los datos se analizaron estadísticamente por medio de: análisis de la varianza multivariada y análisis de correlación simple utilizando el paquete estadístico InfoStat. Los resultados muestran que los tiempos de deshidratación se ven influenciados por la edad del animal pero no por la posición ni por el peso del órgano. Plastination is the most modern technique for the preservation of anatomical pieces and specimens. This technique consists of four stages: fixation, dehydration, forced impregnation, and cured. This research aims at improving the efficiency of production plastinated organs through the standard technique known as S10. Kidneys of criole mestizo equines from Frigorifico Aimar S.A placed in the rural area of Rio IV were used. After binding the organ with formalin, it was dehydrated. The dehydration was carried out in three sub-stages working at the same temperature, and a solvent composed of solution of acetone of different concentrations was used. The measurements were analysed with acetometer, keeping register of the time consumption to reach dehydration. The resulting data was statistically analysed using Infostat program. Results showed that the time consumed to reach dehydration was influenced by the horses age but not by the kidney's weight, there were no significant differences between right and left kidneys neither.
Características Mecánicas Dinámicas del Fémur Aislado de Perro, Sometido a Prueba de Impacto Dynamic Mechanical Characteristics of the Isolated Dog Femur, Subjected to Impact Test
C Fioretti,J Natali,A Galán,M. C Rivera
International Journal of Morphology , 2011,
Abstract: El presente trabajo tiene el propósito de brindar información acerca del comportamiento biomecánico del fémur de perro sometido a cargas dinámicas. El objetivo es evaluar la resistencia del fémur frente al impacto, mediante el Método de Ensayo Charpy, relacionando dicha resistencia con las áreas: total, cortical y cavidad medular del hueso, comparándola entre edad y sexo diferentes. Se utilizaron fémur de perro en condiciones aisladas, extraídos postmortem de 30 animales mestizos adultos, provenientes del servicio de zoonosis de la ciudad de Río Cuarto. Se determinó en los fémures derecho e izquierdo: peso y longitud total del hueso, diámetro cráneo-caudal y latero-medial en la mitad de la diáfisis. El fémur izquierdo fue osteotomizado transversalmente en la mitad de su diáfisis. En la superficie de sección se medió espesor de la cortical y diámetro medular. Se obtuvo el área de sección total, cortical y medular. El fémur del miembro pélvico derecho fue sometido al Método de Ensayo Charpy. Los resultados obtenidos fueron analizados estadísticamente encontrándose que el área cortical depende linealmente de la longitud del hueso (r=0,62, p= 0,00025); la resistencia del hueso depende de las áreas cortical (r=0,71, p= 0,000012) y área total (global) (r=0,63, p= 0,00021) y no del área medular (r=0,29, p= 0,12). El análisis exploratorio muestra que no existirían diferencias acerca de la influencia de la edad y el sexo sobre la resistencia del fémur. Tras estos resultados se puede inferir que a medida que aumenta el área cortical aumenta la energía de impacto absorbida. This paper is intended to provide information about biomechanical behavior femur at impact using the Charpy test method relating the resistance in the following areas: total, cortical and medullary bone cavity, comparing these between different ages and sexes. Dog femors were used in isolated conditions, removed postmortem from 30 adult animals, defined raceless, from the zoonoses service of the city of Rio Cuarto. Weight, total bone length, cranio-caudal diameter and lateral medial half of the diaphysis, were determined in the left and right femur. The left femur was osteotomized transversely in the middle of the diaphysis. In the sectional area thickness of the cortical and medullary diameters were measured. We obtained the total sectional area, cortical and medullary. The femur of the right lower limb was subjected to the Charpy test method. Results were statistically analyzed and found that cortical area depends linearly on the length of the bone (r=0.62, p=0.00025), bone strength depends o
The Production Function
Guido Fioretti
Physics , 2005,
Abstract: Productions functions map the inputs of a firm or a productive system onto its outputs. This article expounds generalizations of the production function that include state variables, organizational structures and increasing returns to scale. These extensions are needed in order to explain the regularities of the empirical distributions of some economic variables.
The status of the cervical spine in preschool children with a history of congenital muscular torticollis  [PDF]
Anna M. ?hman
Open Journal of Therapy and Rehabilitation (OJTR) , 2013, DOI: 10.4236/ojtr.2013.12006
Abstract: Background: Infants with congenital muscular torticollis are born with an asymmetric range of motion and a muscular imbalance in the cervical spine, as a result of a shortening or excessive contraction of the sternocleidomastoid muscle. Purpose: The study aimed to investigate passive range of motion (PROM) for rotation and lateral flexion, and muscle function of the cervical spine in children that had a history of CMT as infants. Study design: a prospective cohort study. Patient sample: 58 children at the age of 3.5 to 5 years that had been treated for CMT have infants participated in the study. Method: PROM was measured with protractors and muscle function was estimated with a modified Muscle Function Scale. Data from infancy were taken from earlier records. Result: PROM in rotation of the neck was mean 98.7° and PROM in lateral flexion of the neck was mean 69.1°. Symmetric PROM of the neck was found in 74% of the children for rotation and in 88% of the children for lateral flexion. Multiple regression showed that gender and PROM in rotation as infants had a significant impact on asymmetric PROM. Forty-five percent of the children had some degree of muscular imbalance in the lateral flexors of the neck. Conclusion: Possible risk factors for later asymmetric PROM are: gender, birth weight, gestation week and PROM in rotation as infants. These factors ought to be taken into consideration when developing guidelines for long-term follow-up.
Laser cooling of rotation and vibration by optical pumping
I. Manai,R. Horchani,M. Hamamda,A. Fioretti,M. Allegrini,H. Lignier,P. Pillet,D. Comparat
Physics , 2013, DOI: 10.1080/00268976.2013.813980
Abstract: We have recently demonstrated that optical pumping methods combined with photoassociation of ultra-cold atoms can produce ultra-cold and dense samples of molecules in their absolute rovibronic ground state. More generally, both the external and internal degrees of freedom can be cooled by addressing selected rovibrational levels on demand. Here, we recall the basic concepts and main steps of our experiments, including the excitation schemes and detection techniques we use to achieve the rovibrational cooling of Cs2 molecules. In addition, we present the determination of formation pathways and a theoretical analysis explaining the experimental observations. These simulations improves the spectroscopic knowledge required to transfer molecules to any desired rovibrational level.
Relaciones entre el índice de verdor y el nivel hídrico foliar en trigo con diferentes sistemas de labranza
Mirassón1,HR; Faraldo,ML; Fioretti,MN; Miravalles,M; Brevedan,RE;
Phyton (Buenos Aires) , 2010,
Abstract: tillage system is an important management decision that has to be taken in the central, semiarid, temperate region of argentina for dryland wheat production. a 2-year study was conducted on an entic haplustoll soil with a sandy loam texture to determine the effects of three tillage systems (conventional, vertical and notillage) on leaf water status and chlorophyll content. measurements were made at the z65 growth stage with a spad-502; leaf water potential measurements were simultaneously taken. there was a positive relationship between leaf water potential and leaf greenness in both years. tillage systems were significantly different in 2007; both variables were greater (p<0.05) in the conventional than in the vertical or no-tillage system. these differences were not significant (p>0.05) in 2008.
X-ray view of four high-luminosity Swift/BAT AGN: Unveiling obscuration and reflection with Suzaku
V. Fioretti,L. Angelini,R. F. Mushotzky,M. Koss,G. Malaguti
Physics , 2013, DOI: 10.1051/0004-6361/201219460
Abstract: The Swift/BAT nine-month survey observed 153 AGN, all with ultra-hard X-ray BAT fluxes in excess of 10^-11 erg cm^-2 s^-1 and an average redshift of 0.03. Among them, four of the most luminous BAT AGN (44.73 < Log L(BAT) < 45.31) were selected as targets of Suzaku follow-up observations: J2246.0+3941 (3C 452), J0407.4+0339 (3C 105), J0318.7+6828, and J0918.5+0425. The column density, scattered/reflected emission, the properties of the Fe K line, and a possible variability are fully analyzed. For the latter, the spectral properties from Chandra, XMM-Newton and Swift/XRT public observations were compared with the present Suzaku analysis. Of our sample, 3C 452 is the only certain Compton-thick AGN candidate because of i) the high absorption and strong Compton reflection; ii) the lack of variability; iii) the "buried" nature, i.e. the low scattering fraction (<0.5%) and the extremely low relative [OIII] luminosity. In contrast 3C 105 is not reflection-dominated, despite the comparable column density, X-ray luminosity and radio morphology, but shows a strong long-term variability in flux and scattering fraction, consistent with the soft emission being scattered from a distant region (e.g., the narrow emission line region). The sample presents high (>100) X-to-[OIII] luminosity ratios, confirming the [OIII] luminosity to be affected by residual extinction in presence of mild absorption, especially for "buried" AGN such as 3C 452. Three of our targets are powerful FRII radio galaxies, making them the most luminous and absorbed AGN of the BAT Seyfert survey despite the inversely proportional N_H - L_X relation.
Rovibrational cooling of molecules by optical pumping
I. Manai,R. Horchani,H. Lignier,A. Fioretti,M. Allegrini,P. Pillet,D. Comparat
Physics , 2012, DOI: 10.1103/PhysRevLett.109.183001
Abstract: We demonstrate rotational and vibrational cooling of cesium dimers by optical pumping techniques. We use two laser sources exciting all the populated rovibrational states, except a target state that thus behaves like a dark state where molecules pile up thanks to absorption-spontaneous emission cycles. We are able to accumulate photoassociated cold Cs2 molecules in their absolute ground state (v = 0, J = 0) with up to 40% efficiency. Given its simplicity, the method could be extended to other molecules and molecular beams. It also opens up general perspectives in laser cooling the external degrees of freedom of molecules.
GAMMA-LIGHT: High-Energy Astrophysics above 10 MeV
Aldo Morselli,Andrea Argan,Guido Barbiellini,Walter Bonvicini,Andrea Bulgarelli,Martina Cardillo,Andrew Chen,Paolo Coppi,Anna Maria Di Giorgio,Immacolata Donnarumma,Ettore Del Monte,Valentina Fioretti,Marcello Galli,Manuela Giusti,Attilio Ferrari,Fabio Fuschino,Paolo Giommi,Andrea Giuliani,Claudio Labanti,Paolo Lipari,Francesco Longo,Martino Marisaldi,Sergio Molinari,Carlos Mu?oz,Torsten Neubert,Piotr Orleanski,Josep M. Paredes,M. ángeles Pérez-García,Giovanni Piano,Piergiorgio Picozza,Maura Pilia,Carlotta Pittori,Gianluca Pucella,Sabina Sabatini,Edoardo Striani,Marco Tavani,Alessio Trois,Andrea Vacchi,Stefano Vercellone,Francesco Verrecchia,Valerio Vittorini,Andrzej Zdziarski
Physics , 2014,
Abstract: High-energy phenomena in the cosmos, and in particular processes leading to the emission of gamma- rays in the energy range 10 MeV - 100 GeV, play a very special role in the understanding of our Universe. This energy range is indeed associated with non-thermal phenomena and challenging particle acceleration processes. The technology involved in detecting gamma-rays is challenging and drives our ability to develop improved instruments for a large variety of applications. GAMMA-LIGHT is a Small Mission which aims at an unprecedented advance of our knowledge in many sectors of astrophysical and Earth studies research. The Mission will open a new observational window in the low-energy gamma-ray range 10-50 MeV, and is configured to make substantial advances compared with the previous and current gamma-ray experiments (AGILE and Fermi). The improvement is based on an exquisite angular resolution achieved by GAMMA-LIGHT using state-of-the-art Silicon technology with innovative data acquisition. GAMMA-LIGHT will address all astrophysics issues left open by the current generation of instruments. In particular, the breakthrough angular resolution in the energy range 100 MeV - 1 GeV is crucial to resolve patchy and complex features of diffuse sources in the Galaxy as well as increasing the point source sensitivity. This proposal addresses scientific topics of great interest to the community, with particular emphasis on multifrequency correlation studies involving radio, optical, IR, X-ray, soft gamma-ray and TeV emission. At the end of this decade several new observatories will be operational including LOFAR, SKA, ALMA, HAWK, CTA. GAMMA-LIGHT will "fill the vacuum" in the 10 MeV-10 GeV band, and will provide invaluable data for the understanding of cosmic and terrestrial high-energy sources.
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