Search results for "nimi"

¿Málaga o Màlega? El problema de l'exotoponímia a la llum de la llengua antiga

1993

Systematic conformational search analysis of the SRR and RRR epimers of 7-hydroxymatairesinol

2009

An extensive and systematic conformational search was performed on the two epimers of the natural lignan 7-hydroxymatairesinol (HMR), by means of a home-made Systematic Conformational Search Analysis (SCSA) code, designed to select more and more stable conformers through sequential geometry optimization of trial structures at increasing levels of calculation theory. In the present case, the starting molecular structures were selected by the semi-empirical AM1 method and filtered – i.e. decreased in number by choosing the more stable species – on the basis of their energy calculated by the HF method and the 6-31G(d) basis set. The geometries obtained were further refined by performing densit…

Controlled rearrangement of lactam-tethered allenols with brominating reagents: a combined experimental and theoretical study on α- versus β-keto lac…

2011

N-Bromosuccinimide (NBS) smoothly promotes the ring expansion of lactam-tethered allenols to efficiently afford cyclic α- or β-ketoamides with good yields and high chemo-, regio-, and diastereoselectivity, through controlled C-C bond cleavage of the β- or γ-lactam nucleus. Interestingly, in contrast to the rearrangement reactions of 2-azetidinone-tethered allenols, which lead to the corresponding tetramic acid derivatives (β-keto lactam adducts) as the sole products, the reactions of 2-indolinone-tethered allenols under similar conditions give quinoline-2,3-diones (α-keto lactam adducts) as the exclusive or major products. To rationalize the experimental observations, theoretical studies ha…

Are decisions in a real choice experiment consistent with reservation prices elicited with BDM 'auction'? The case of French baguettes

2014

Abstract The aim of this study was to compare consumer choices observed in a real choice experiment and their reservation prices elicited with the BDM mechanism in order to assess the rationality of participant behaviors. One hundred and seventy-seven participants tested four French baguettes in each task. For the real choice experiment, participants were faced with 17 scenarios (17 × 4 baguette-price combinations). In each method, participants could select a “no purchase” option. Comparing choices and reservation prices made it possible to assess the rationality of participant behaviors. From a strict economic standpoint, 50% of observed choices were fully rational. When one baguette was a…

Intermolecular Cystine-Bonding of Murine Interleukin 2 Indicates that Ligand Dimerization is Important for the Formation of the High-Affinity Recepto…

1992

Interleukin 2 is thought to be active as a monomeric protein. As the nonessential Cys-140 of murine interleukin 2 (mIL2) is located in the hydrophobic interface of the amphiphilic F domain it was successfully used to stabilize hydrophobic amino acid contacts between two mIL2 cores yielding biologically active cystine-bonded dimeric mIL2. (3H) thymidine incorporation assays with intermolecular cystine-bonded or monomeric mIL2 revealed almost identical median effective concentrations (EC50) and high-affinity dissociation constants (Kdh), respectively. Comparative binding and internalization assays suggest that one cystine-bonded dimeric or two monomeric mIL2 molecules bind to the high-affinit…

Efficiency Improvement of Inverter-Fed Permanent Magnet Synchronous Motors

2003

In this paper a control algorithm for the efficiency improvement of inverter-fed permanent magnet synchronous motors (PMSMs) is presented. The proposed algorithm allows reducing the losses of the drive without reduction of its dynamic performances. In details, after recalling a dynamic model of the PMSM, which has been purposely modified and that takes into account the iron losses, the basic equations and the constraints to obtain the loss minimization are presented and discussed. Some simulations of a specific PMSM drive employing the proposed algorithm are performed. The results of these simulations show that the dynamic performances are maintained, and enhancement of the efficiency up to…

Revisión taxonómica de Helix zapateri Hidalgo, 1870 (Pulmonata: Trissexodontidae) y su nuevo estatus en la malacofauna ibérica

2008

Alberto Martínez Ortí: alberto.martinez@uv.es Revisión taxonómica de Helix zapateri Hidalgo, 1870 (Pulmonata, Trissexodontidae) y su nuevo estatus en la malacofauna ibérica.— Se realiza la revisión taxonómica y se discute la nueva asignación genérica del taxon ibérico Helix zapateri, mediante la comparación de caracteres conquiológicos con las especies más similares, Hatumia pseudogasulli y Gasullia gasulli, ambas trissexodóntidos. Los estudios conquiológicos nos permiten concluir que Helix zapateri debe ser considerada como una especie válida y designarse como Hatumia zapateri, y que Hatumia pseudogasulli corresponde a un sinónimo posterior de H. zapateri. Taxonomical revision of Helix zap…

BUONE PRATICHE PER LA GESTIONE E LA MANUTENZIONE DEI SITI ARCHEOLOGICI

2014

I siti archeologici sono risorse limitate, in quanto irriproducibili, e allo stesso tempo vulnerabili, per la loro intrinseca fragilità e per le numerose minacce cui sono soggette; per conservarne l’integrità e garantirne la trasmissione alle generazioni future è necessario assicurare a tali luoghi un’attenta gestione e cure continue. L’obiettivo generale della presente ricerca è quello di definire alcune buone pratiche per la gestione dei siti archeologici e di mostrare la convenienza della manutenzione programmata nella conservazione del patrimonio. La Tesi di Dottorato analizza la legislazione italiana vigente sul tema della conservazione del costruito archeologico e definisce una metodo…

Origen y condición de "Arse-Saguntum"

1997

En este trabajo se presenta una aproximación al origen y condición de la ciudad saguntina como premisa necesaria para entender su participación en el inicio de la Segunda Guerra Púnica. Especial atención merece el binomio Arse-Saguntum como encubridora de una realidad también dual.

Prior precision modulates the minimisation of prediction error in human auditory cortex

2018

AbstractThe predictive coding model of perception proposes that successful representation of the perceptual world depends upon cancelling out the discrepancy between prediction and sensory input (i.e., prediction error). Recent studies further suggest a distinction between prediction error associated with non-predicted stimuli of different prior precision (i.e., inverse variance). However, it is not fully understood how prediction error from different precision levels is minimised in the predictive process. The current research used magnetoencephalography (MEG) to examine whether prior precision modulates the cortical dynamics of the making of perceptual inferences. We presented participant…