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Search Results: 1 - 10 of 471878 matches for " Moisés Herradón Cueto "
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An explicit quasiplatonic curve with field of moduli $\mathbb Q(\sqrt[3]{2})$
Moisés Herradón Cueto
Mathematics , 2015,
Abstract: We give an example of a regular dessin d'enfant with field of moduli $\mathbb Q(\sqrt[3]{2})$, thus providing an explicit example of a regular dessin d'enfant with non-abelian field of moduli, answering a question in [1]. We also prove that the underlying curve has non-abelian field of moduli. In the last section, we note that two examples in previous literature can be used to find examples of regular dessins d'enfants with non-abelian field of moduli. The main result is explained in further detail in the first author's master's thesis [7].
Dynamic Stability and Thermodynamic Characterization in an Enzymatic Reaction at the Single Molecule Level
Moisés Santillán
Quantitative Biology , 2010, DOI: 10.1016/j.physa.2011.05.032
Abstract: In this work we study, at the single molecular level, the thermodynamic and dynamic characteristics of an enzymatic reaction comprising a rate limiting step. We investigate how the stability of the enzyme-state stationary probability distribution, the reaction velocity, and its efficiency of energy conversion depend on the system parameters. We employ in this study a recently introduced formalism for performing a multiscale thermodynamic analysis in continuous-time discrete-state stochastic systems.
El silbo gomero. Tradición viva de la cultura canaria y Patrimonio de la Humanidad
Plasencia Martín, Moisés
PASOS : Revista de Turismo y Patrimonio Cultural , 2007,
Abstract: The Silbo Gomero is a substitute, a contracted form, spontaneous and a non-conventional language. It is able to transmit and to interchange a limitless range of messages over long distances by means of whistles, being reproduced by the sonorous characteristics of a spoken language. At the present time this primary language is the Spanish spoken in the Canary Islands. Government of Canary has recently implemented a large number of activities which started with the intention to show the Silbo Gomero as an artistic source and to encourage scientific research on this whistled language. One of the most significant measures taken by General Direction for Cooperation and Cultural Patrimony has to do with a proposal to UNESCO in order to consider the Silbo Gomero as a Master Piece of the Oral and Intangible World Heritage
Elecciones locales en Oxaca en 1980
Moisés Jaime Bailón
Nueva antropología , 1984,
Cintas, medidas y estadales de la Virgen (Colección del Museo Nacional de Antropología)
Herradón Figueroa, M. Antonia
Revista de Dialectología y Tradiciones Populares , 2001,
Abstract: The author analyzes literary sources as well as exhibits of the Museo Nacional de Antropología in Madrid regarding the cintas, medidas and estadales of images of Mary, a litde known but significant aspect of Spain's religious tradition. A través de la investigación de fuentes literarias, la autora estudia las cintas, las medidas y los estadales de la Virgen María, que constituyen un destacado y a la vez desconocido capítulo de la tradición religiosa en Espa a. En el desarrollo del tema, el estudio de las fuentes escritas se contrasta con el análisis de piezas conservadas en el Museo Nacional de Antropología de Madrid.
La reforma fiscal ecológica en la Unión Europea: antecedentes, experiencias y propuestas
Fuentes García, Fernando,Lara de Vicente, Fernando,López Guzmán Guzmán, Tomás J.,Veroz Herradón, Ricardo
Revista de Economía Institucional , 2006,
Determination of Total Selenium in Infant Formulas: Comparison of the Performance of FIA and MCFA Flow Systems
Mariela Pistón,Moisés Knochen
International Journal of Analytical Chemistry , 2012, DOI: 10.1155/2012/918292
Abstract: Two flow methods, based, respectively, on flow-injection analysis (FIA) and on multicommutated flow analysis (MCFA), were compared with regard to their use for the determination of total selenium in infant formulas by hydride-generation atomic absorption spectrometry. The method based on multicommutation provided lower detection and quantification limits (0.08 and 0.27?μg?L?1 compared to 0.59 and 1.95?μ?L?1, resp.), higher sampling frequency (160 versus. 70 samples per hour), and reduced reagent consumption. Linearity, precision, and accuracy were similar for the two methods compared. It was concluded that, while both methods proved to be appropriate for the purpose, the MCFA-based method exhibited a better performance. 1. Introduction The importance of selenium for the life of animals has been known since the 1950s, while the essentiality of this element for humans was revealed in 1970s with the discovery of its ability to prevent the Keshan disease, first described in 1935 in China in a province of the same name [1]. Subsequently, it was discovered its important role as part of the body’s antioxidant mechanisms and also its role in protecting the body against heavy metals as well as its importance in the immune system [1, 2]. Cow’s milk and dairy products are usually a poor source of selenium in human nutrition. Human milk is considered the best source of selenium for young children and infants [3]. However, human milk is a poor source of selenium, so recently manufacturers of dairy-based infant formulas have added selenium to these products. Selenium has a very narrow range between dietary deficiency (<40?μg/day for adults) and toxic levels (>400?μg/day). For this reason, it is very important to have control of the selenium intake by human and animals. Several analytical techniques are suitable for determining total selenium in milk, such as neutron activation analysis (Instrumental Neutron Activation Analysis (INAA)), fluorimetry, gas chromatography (GC), and atomic absorption spectrometry (AAS) [4]. The neutron activation technique is not available in most laboratories; it is generally used for determinations of selenium in certified reference materials as an alternative method and in proficiency testing. It has the advantage of being a nondestructive technique, but the detection limits are usually higher than for other techniques [3, 4]. Other methods usually are based on the generation of a piazselenol complex, which is subsequently submitted to different detection techniques. For instance, a fluorimetric method is recommended in the bulletin of
A Proposed Mechanism for the Interaction of the Segmentation Clock and the Determination Front in Somitogenesis
Moisés Santillán, Michael C. Mackey
PLOS ONE , 2008, DOI: 10.1371/journal.pone.0001561
Abstract: Background Recent discoveries in the field of somitogenesis have confirmed, for the most part, the feasibility of the clock and wavefront model. There are good candidates for both the clock (various genes expressed cyclically in the tail bud of vertebrate embryos have been discovered) and the wavefront (there are at least three different substances, whose expression levels vary along the presomitic mesoderm [PSM], that have important effects on the formation of somites). Nevertheless, the mechanisms through which the wavefront interacts with the clock to arrest the oscillations and induce somite formation have not yet been fully elucidated. Principal Findings In this work, we propose a gene regulatory network which is consistent with all known experimental facts in embryonic mice, and whose dynamic behaviour provides a potential explanation for the periodic aggregation of PSM cells into blocks: the first step leading to the formation of somites. Significance To our knowledge, this is the first proposed mechanism that fully explains how a block of PSM cells can stop oscillating simultaneously, and how this process is repeated periodically, via the interaction of the segmentation clock and the determination front.
Variantes terapéuticas en la sepsis provocada por gérmenes multirresistentes
Morejón García,Moisés;
Revista Cubana de Farmacia , 2006,
Abstract: bacterial resistance has become a current problem, first, due to its constant rise and, secondly, to the increasingly worrying appearance of bacterial strains resistant to multiple microorganisms to which they were previously sensitive. this associated with the poor development of antimicrobials, has put doctors in a disadvantageous situation in the case of sepsis due to multiresistant germs. a review of the grampositive and gramnegative germs participating the most in this phenomenon, as well as of the available antimicrobials nowadays to fight them was made in this paper
Neumococo resitente ¡alarma mundial
Morejón García,Moisés;
Revista Cubana de Medicina General Integral , 1997,
Abstract: : a chronological analysis of the streptococcus pneumoniae resistant to penicillin was made. its world spread, resistance mechanism, possible causes of appearance, behaviour before the sepses caused by such strains, and the measures to counteract its rise were also included.
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