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Search Results: 1 - 10 of 219523 matches for " C. Rusconi "
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Magnetic Rigid Rotor in the Quantum Regime: Theoretical Toolbox
Cosimo C. Rusconi,Oriol Romero-Isart
Physics , 2015,
Abstract: We describe the quantum dynamics of a magnetic rigid rotor in the mesoscopic scale where the Einstein-De Haas effect is predominant. In particular, we consider a single-domain magnetic nanoparticle with uniaxial anisotropy in a magnetic trap. Starting from the basic Hamiltonian of the system under the macrospin approximation, we derive a bosonized Hamiltonian describing the center-of-mass motion, the total angular momentum, and the macrospin degrees of freedom of the particle treated as a rigid body. This bosonized Hamiltonian can be approximated by a simple quadratic Hamiltonian that captures the rich physics of a nanomagnet tightly confined in position, nearly not spinning, and with its macrospin anti-aligned to the magnetic field. The theoretical tools derived and used here can be applied to other quantum mechanical rigid rotors.
GNU polyxmass: a software framework for mass spectrometric simulations of linear (bio-)polymeric analytes
Filippo Rusconi
BMC Bioinformatics , 2006, DOI: 10.1186/1471-2105-7-226
Abstract: The GNU polyxmass software framework performs common (bio-)chemical simulations–along with simultaneous mass spectrometric calculations–for any kind of linear bio-polymeric analyte (DNA, RNA, saccharides or proteins). The framework is organized into three modules, all accessible from one single binary program. The modules let the user to 1) define brand new polymer chemistries, 2) perform quick mass calculations using a desktop calculator paradigm, 3) graphically edit polymer sequences and perform (bio-)chemical/mass spectrometric simulations. Any aspect of the mass calculations, polymer chemistry reactions or graphical polymer sequence editing is configurable.The scientist who uses mass spectrometry to characterize (bio-)polymeric analytes of different chemistries is provided with a single software framework for his data prediction/analysis needs, whatever the polymer chemistry being involved.Mass spectrometry has proven essential in structural studies in which biopolymer molecules of a variety of polymer chemistries are involved. Indeed, while proteins were once the main biopolymeric analytes studied by mass spectrometry, oligo(deoxy)ribonucleotides and saccharides also are routinely analyzed today and mass spectrometry is used, for example, for the characterization of DNA-protein complexes or for the gas phase sequencing of saccharides (for reviews, see [1-4]). The current and ever-increasing variety of mass spectrometer designs affords a rather large array of experiments that can be performed on different biopolymers. Thus, the variety of polymer chemistries analyzable by mass spectrometry is compounded by the variety of mass spectrometric experiments, producing an extremely diverse set of mass data to be either predicted or analysed with the help of appropriate software tools. It is noteworthy that, while some experiments are almost completely automatable (like in the case of high-throughput proteomics), a majority of the experiments being performed in mass spe
La historia del fin: cristianismo y milenarismo
Roberto Rusconi
Teología y vida , 2003,
Effect of SiO2 coating in bolometric Ge light detectors for rare event searches
J. W. Beeman,A. Gentils,A. Giuliani,M. Mancuso,G. Pessina,O. Plantevin,C. Rusconi
Physics , 2012, DOI: 10.1016/j.nima.2013.01.019
Abstract: In germanium-based light detectors for scintillating bolometers, a SiO$_2$ anti-reflective coating is often applied on the side of the germanium wafer exposed to light with the aim to improve its light collection efficiency. In this paper, we report about a measurement, performed in the temperature range 25-35 mK, of the light-collection increase obtained thanks to this method, which resulted to be of the order of 20%. The procedure followed has been carefully selected in order to minimize systematic effects. The employed light sources have the same spectral features (peaking at $\sim 630$ nm wavelength) that will characterise future neutrinoless double beta decay experiments on the isotope $^{82}$Se and based on ZnSe crystals, such as LUCIFER. The coupling between source and light detector reproduces the configuration used in scintillating bolometers. The present measurement clarifies the role of SiO$_2$ coating and describes a method and a set-up that can be extended to the study of other types of coatings and luminescent materials.
La Crítica a Aristóteles en De Beryllo de Nicolás de Cusa
Maria Cecília Rusconi
Princípios : Revista de Filosofia , 2002,
Gabriel Stiglitz,Dante Rusconi
Vniversitas , 2010,
Unimanual SNARC Effect: Hand Matters
Marianna Riello,Elena Rusconi
Frontiers in Psychology , 2011, DOI: 10.3389/fpsyg.2011.00372
Abstract: A structural representation of the hand embedding information about the identity and relative position of fingers is necessary to counting routines. It may also support associations between numbers and allocentric spatial codes that predictably interact with other known numerical spatial representations, such as the mental number line (MNL). In this study, 48 Western participants whose typical counting routine proceeded from thumb-to-little on both hands performed magnitude and parity binary judgments. Response keys were pressed either with the right index and middle fingers or with the left index and middle fingers in separate blocks. 24 participants responded with either hands in prone posture (i.e., palm down) and 24 participants responded with either hands in supine (i.e., palm up) posture. When hands were in prone posture, the counting direction of the left hand conflicted with the direction of the left–right MNL, whereas the counting direction of the right hand was consistent with it. When hands were in supine posture, the opposite was true. If systematic associations existed between relative number magnitude and an allocentric spatial representation of the finger series within each hand, as predicted on the basis of counting habits, interactions would be expected between hand posture and a unimanual version of the spatial–numerical association of response codes (SNARC) effect. Data revealed that with hands in prone posture a unimanual SNARC effect was present for the right hand, and with hands in supine posture a unimanual SNARC effect was present for the left hand. We propose that a posture-invariant body structural representation of the finger series provides a relevant frame of reference, a within-hand directional vector, that is associated to simple number processing. Such frame of reference can significantly interact with stimulus–response correspondence effects, like the SNARC, that have been typically attributed to the mapping of numbers on a left-to-right mental line.
Comparación de métodos diagnósticos de diarreas asociadas a Clostridium difficile
Trejo,F. M.; Rusconi,M. E.; Guzzetti,L.; Zamboni,M. I.; Guardati,M. C.; Lejona,S.; Pérez,P. F.;
Revista argentina de microbiolog?-a , 2010,
Abstract: in order to compare different methods for the diagnosis of clostridium difficile-associated diarrhea, fecal filtrates from patients presenting symptoms compatible with this condition, were analyzed. biological activity on vero cells (biological assay), dot blot with antibodies anti-tcda and anti-tcdb, and a pcr assay for the tcdb gene, were evaluated. titles of biological assays were ≥ 64 for 44 out of 177 samples. nineteen samples were positive in both biological and pcr assays. the analysis by dot blot using anti-tcda and anti-tcdb antibodies showed that 46 samples out of 149 were positive for both toxins whereas 12 samples were only positive for tcdb, and 5 samples only positive for tcda. discrepancies in the different methods could be related to truncated genes, low number of microorganisms in the samples and toxin degradation. the results herein presented show the need for developing diagnostic approaches compatible with the complex epidemiological situation of this clinically relevant intestinal pathogen.
Nutrients Extracted from Chicken Manure Accelerate Growth of Microalga Scenedesmus obliquus HTB1  [PDF]
Xiaotian Han, Nicole Rusconi, Pervaiz Ali, Kevin Pagkatipunan, Feng Chen
Green and Sustainable Chemistry (GSC) , 2017, DOI: 10.4236/gsc.2017.72009
Abstract: Sustainable development using wastes as resources is a new paradigm. Chicken manure contains rich amounts of nitrogen and phosphorus and has been used as crop fertilizer. However, little is known about whether nutrients of chicken manure are suitable and efficient to support the rapid growth of microalgae. In this study, we explore the possibility of using nutrient extracted from chicken manure to grow microalgae. We used an algal strain Scenedesmus sp. HTB1, which is an oleaginous species with high CO2 tolerance capability. The growth performance of HTB1 on various media amended with nutrient extracted from three different chicken manure sources was monitored and compared to the growth rate of HTB1 grown in the standard medium BG11. Meanwhile, the changes of total nitrogen (N) and phosphorus (P), both organic and inorganic, were measured during the growth period. Culture media enriched with the nutrient extracted from two chicken manure sources outperformed the standard culture medium BG11 in terms of algal biomass production. When cultivated with manure nutrient, HTB1 utilized inorganic N efficiently, but consumed very little organic N during the experimental growth period. However, HTB1 was able to utilize both organic and inorganic phosphorus. We demonstrate that nutrient extracted from chicken manure support rapid growth and high biomass yield in microalgae?Scenedesmus obliquus?HTB1. Therefore chicken manure holds great promise to be used as a cost-effective and efficient fertilizer for large-scale production of microalgae.
Radioactivity in drinking water: regulations, monitoring results and radiation protection issues
Nuccetelli,Cristina; Rusconi,Rosella; Forte,Maurizio;
Annali dell'Istituto Superiore di Sanità , 2012, DOI: 10.4415/ANN_12_04_04
Abstract: introduction: drinking waters usually contain several natural radionuclides: tritium, radon, radium, uranium isotopes, etc. their concentrations vary widely since they depend on the nature of the aquifer, namely, the prevailing lithology and whether there is air in it or not. aims: in this work a broad overview of the radioactivity in drinking water is presented: national and international regulations, for limiting the presence of radioactivity in waters intended for human consumption; results of extensive campaigns for monitoring radioactivity in drinking waters, including mineral bottled waters, carried out throughout the world in recent years; a draft of guidelines for the planning of campaigns to measure radioactivity in drinking water proposed by the environmental protection agency (arpa) of lombardia.
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