245 research outputs found
Sul controllo di qualità dei distaccanti, ausiliari per prodotti da forno
No full textGli Autori evidenziano l’importanza dell’attività del controllo qualità nella produzione degli agenti distaccanti da impiegare nell’industria dei prodotti da forno. A questo proposito risulta importante la verifica di qualità della frazione grassa utilizzata come componente fondamentale e veicolante altre materie prime e/o additivi, e vengono riportati dati di composizione in trigliceridi di oli impiegati in formulazione di alcuni distaccanti in commercio sul mercato nazionale.
Nello stesso tempo si dimostra evidente il fenomeno di migrazione del distaccante dal contenitore di
cottura al prodotto da forno cotto: ciò suggerisce considerazioni utili in merito all’uso di alcuni componenti ausiliari impiegati in formulazione. Con tale nota si auspica una più chiara regolamentazione dell’uso di alcuni additivi oltre ad una sempre maggiore attenzione per la razionale scelta delle materie prime impiegate, sia ai fini della costanza di efficienza che ai fini della qualità e sicurezza degli alimenti
Diffusione nell'ambiente, effetti tossici e cancerogeni del cromo
No full texteffetti tossici e cancerogeni del crom
Achievable spectral efficiency of line-of-sight MIMO fixed links with compact planar antenna arrays and power amplifier limitations
No full textFixed Point-to-Point microwave wireless systems with high spectral efficiency are needed to meet the pervasive and increasing demand for capacity in back-haul networks of mobile radio systems. In this context, spatially multiplexed LoS-MIMO (Line-of-Sight Multiple Input Multiple Output) systems have been studied for about twenty years, particularly in the millimeter wave frequency bands (above 15 GHz). However, their deployment in real networks has been really limited, to the authors’ knowledge. This has been due to several factors, i.e. the practical possibility of using extremely high-level modulation formats (nowadays up to 8192-QAM), the joint use of co-channel dual polarization, and the availability of wider channel bands in the new high frequency ranges (e.g. E-Band). In addition, a crucial reason has been the difficulty of installing multiple antennas spaced apart in order to maximize the MIMO spatial multiplexing so providing the maximum capacity gain. This optimal antenna separation, even for the classical MIMO with M = 2 antennas at the receiver and N = 2 antennas at the transmitter, can be several meters, e.g. 5.71 m at 23 GHz on a 5 km link. In this article, we analyze the performance of LoS-MIMO systems where antenna separation is highly sub-optimal, for limiting the array size, and a satisfactory performance is made possible by the exploitation of specific bit loading and power allocation strategies and the setting of the working region of the RF transmitter power amplifiers to operate at a given Signal-to-Inter Modulation Distortion Ratio (SIMDR). The result is an overview of the advantages and drawbacks of compact LoS-MIMO from a wider perspective than in the existing literature, including fundamental aspects for the practical implementation of these systems. Performance is discussed in many cases of interest and compared with the state of the art SISO (Single Input Single Output) system
Situaciones problemáticas en el aprendizaje significativo de biología celular en la carrera de Odontología
No full textPonencia presentada en la II Muestra Nacional de Innovaciones en la Enseñanza de la Odontología y IV Muestra Institucional de Innovaciones en la Enseñanza de la Odontología. Córdoba, 13 y 14 de septiembre de 2012.Fil: Zárate, A. M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Cismondi, A. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Kohan, R. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Llanes, M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Filiberti, A. M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Scherma, M. E. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Brunotto, M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.En la formación de un odontólogo generalista, la Biología Celular comprende la adquisición de los conocimientos que son necesarios para el abordaje de la problemática de la tríada salud- enfermedad- atención en todos sus aspectos preventivos, terapéuticos y epidemiológicos.Fil: Zárate, A. M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Cismondi, A. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Kohan, R. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Llanes, M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Filiberti, A. M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Scherma, M. E. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina.Fil: Brunotto, M. Universidad Nacional de Córdoba. Facultad de Odontología. Departamento de Biología Bucal. Cátedra A de Biología Celular; Argentina
Analisi dei dati di mortalità per cancro (periodo 1984-87) nei residenti genovesi immigrati da altre regioni
No full text
The reaction between arenediazonium tetrafluoroborates and alkaline thiocarboxylates in DMSO: a convenient access to aryl thiolesters and other aromatic sulfur derivatives
No full textThermal Forces from a Microscopic Perspective
No full textThermal gradients lead to macroscopic fluid motion if a confining surface is present along the gradient. This fundamental nonequilibrium effect, known as thermo-osmosis, is held responsible for particle thermophoresis in colloidal suspensions. A unified approach for thermo-osmosis in liquids and in gases is still lacking. Linear response theory is generalized to inhomogeneous systems, leading to an exact microscopic theory for the thermo-osmotic flow, showing that the effect originates from two independent physical mechanisms, playing different roles in the gas and liquid phases, reducing to known expressions in the appropriate limits
The reactivity of sulfur nucleophiles towards arenediazonium tetrafluoroborates in aprotic sol¬vents: synthesis of S-aryl thioacetates
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