8,306 research outputs found
A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis
No full textRuiz-Sanchez, Eduardo, Castro-Castro, Arturo, Clark, Lynn G. (2022): A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis. Phytotaxa 554 (1): 47-58, DOI: 10.11646/phytotaxa.554.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.554.1.
Por Doña Maria Sebastiana Martinez Ojadecastro Baena y Vega Zaldua y Henestrosa, viuda de Don Tello Gonzalez de Aguilar Ponze de Leon, y por D. Fernando Augustin, su hijo primogenito ... con Doña Antonia de Zaldua y Henestrosa ... sobre la possession del mayorazgo que fundo Juan Martinez Oja de Castro ... a que han salido dicho Don Fernando coadiuvando los derechos de la dicha Doña Maria ...
No full textInic. grab.13425Enc. HolandesaSign.: A-X
Getting ahead, falling behind and standing still. Income mobility in Chile
No full textThis paper analyses household income mobility in Chile between 1996 and 2001. Compared to industrialized and most developing countries, mobility has been quite high. The purpose of this paper is to apply a binomial probit model and split analysis into assessment of individuals and households on the relative income distribution. Main results are that moving from unemployment to employment significantly increases probability of moving up and decreases probability of moving down. Technical-professional education is promoting move up on the relative income scale and it is protecting movement down. An important result is that high-school education decreases probability of degradation.Mobility, Poverty, Household structure, Chile
Estudio de los efectos por irradiación electrónica en Ag/Rb(1-x)K(x)Cl por medio de espectroscopía de electrones Auger.
No full textSe prepararon tres muestras depositando películas de Ag (por evaporación térmica) sobre halogenuros alcalinos mixtos, Ag/Rb1-xKxCl, con fracciones molares de x = 0, 0.25 y 0.50 y se midió la topografía superficial mediante SEM, la cristalinidad de la película de Ag usando TEM y la concentración superficial como función del tiempo, aplicando varios flujos electrónicos (c/cm2s) con energía de haz incidente de 3 KeV, mediante AES. Se usaron modelos de teoría cinética de reacciones químicas para explicar el comportamiento de la dinámica superficial para obtener las constantes de velocidad de la reacción y las secciones transversales al haz de electrones. La película de Ag, con un espesor promedio de 100 nm, presenta huecos con un recubrimiento parcial de la superficie del Rb1-xKxCl de aproximadamente el 80%. Las cuatro dosis electrónicas aplicadas (corrientes de 20, 50, 100 y 200 nA) producen considerables daños estructurales en el volumen cercano a la superficie (aprox. 200 nm) -de los materiales irradiados. Estos daños son proporcionales a la dosis electrónica y se reflejan en cambios notorios de la composición elemental superficial de las muestras estudiadas, tanto de los metales alcalinos como del halógeno, mediante la acumulación de potasio, la acumulación y desorción de rubidio, y la desorción del cloro. La acumulación superficial del potasio se ajusta a una cinética de orden cero sin límite de saturación con un comportamiento de sumidero infinito. El valor medio de las secciones transversales para la acumulación superficial de potasio en las muestras con x = 0.25 y 0.50 es de QK = 7.1 x10-20 y 3.3x10-20 cm2, respectivamente. La acumulación y la evaporación del Rb se modelan mediante procesos secuenciales a una cinética de reacciones químicas de primer orden. El valor medio de las secciones transversales para la acumulación (Q1Rb) y evaporación (Q2Rb) del rubidio en las muestras, con fracción molar x = 0, 0.25 y 0.50 son de Q1Rb = 2.6x10-21, 2.5x10-21 y 1.7x10-21 cm2, Q2Rb = 3. 3x10-20, 4.71x10-20 y 2.4x10-20 cm2, respectivamente La evaporación del CI se modela mediante una cinética de reacciones químicas de primer orden, dando valores medios de la sección transversal para la evaporación, en las tres muestras de QC1 = 2.9 x 10 -20, 8 x 10-20 y 3.8 x 10-20 cm2, respectivamente.Three samples were prepared of Ag films deposited (by means of thermal ' evaporation) on mixed alkali halides, Ag/Rb1-xKxCl, with molar fractions of x = 0, 0.25 and 0.50 and it was measured the surface topography by means of SEM, the crystallinity of the Ag films by TEM and the surface concentration as a function of time, by applying several electronic fluxes (c/cm2s) with incident electron beam energy of 3 KeV, by means of AES. Chemical reaction kinetic models were used in order to explain the behavior of the surface dynamics with the purpose to obtain the reaction rate constants and the electron beam cross sections. The Ag film, with an average thickness of 100 nm, presents holes with a partial surface coverage of the Rb1-xKxCl of about 80%. The four applied electronic doses (intensities of 20, 50, 100 and 200 nA) produce considerable structural damage in the near surface volume (about 200 nm) of the irradiated materials. This damage is proportional to the electronic dose and is observed as notorious changes of the surface elemental composition of the studied samples, on the alkali metals as well as on the halogen, by accumulation of potassium, accumulation and desorption of rubidium, and desorption of chlorine. The accumulation of potassium on the surface fits zero order kinetics without limit of saturation and a behavior of infinite sink. The cross section average value for the surface accumulation of potassium in the samples with x = 0.25 and 0.50 es de QK = 7.1 x10-20 and 3.3x10-20 cm2, respectively. The accumulation and evaporation of Rb were modeled by sequential processes to a first order chemical reaction kinetics. The average value of the rubidium accumulation (Q1Rb) and evaporation (Q2Rb) cross sections on the samples, with molar fractions of x = 0, 0.25 and 0.50 are of Q1Rb = 2.6x10-21, 2.5x10-21 and 1.7x10-21 cm2, Q2Rb = 3. 3x10-20, 4.71x10-20 and 2.4x10-20 cm2, respectively. .The evaporation of Cl was modeled by means of a first order chemical reaction kinetics, obtaining average values for the evaporation cross sections, in the three samples of QC1 = 2.9 x 10 -20, 8 x 10-20 and 3.8 x 10-20 cm2, respectively
Comentarios a la Nueva Biblia de Jerusalén. Evangelio de Juan. [Reseña]
No full textReseña de Secundino CASTRO SANCHEZ, O.C.D.,
Comentarios a la Nueva Biblia de Jerusalén.
Evangelio de Juan, Desclée De
Brouwer, Bilbao 2008, 21 x 15, 376
pp., ISBN 978-84-330-2246-2
Formation of Methane versus Benzene in the Reactions of (C5Me5)(2)Th(CH3)(2) with [CH3PPh3]X (X=Cl, Br, I) Yielding Thorium-Carbene or Thorium-Ylide Complexes
No full textbibtex: ISI:000412189700021 bibtex\location:'POSTFACH 101161, 69451 WEINHEIM, GERMANY',publisher:'WILEY-V C H VERLAG GMBH',type:'Article',affiliation:'Walensky, JR (Reprint Author), Univ Missouri, Dept Chem, Columbia, MO 65211 USA. Maron, L (Reprint Author), Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), LPCNO, CNRS, INSA, UPS,UMR,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France. Rungthanaphatsophon, Pokpong; Bathelier, Adrien; Barnes, Charles L.; Walensky, Justin R., Univ Missouri, Dept Chem, Columbia, MO 65211 USA. Bathelier, Adrien; Castro, Ludovic; Maron, Laurent, Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Bathelier, Adrien; Castro, Ludovic; Maron, Laurent, LPCNO, CNRS, INSA, UPS,UMR,UMR 5215, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'FI7PR',eissn:'1521-3773','funding-acknowledgement':'U.S. Department of Energy, Office of Science, Early Career Research Program [DE-SC-0014174]; Humboldt Foundation; Chinese Academy of Science; CalMip','funding-text':'J.R.W. gratefully acknowledges support for this work from the U.S. Department of Energy, Office of Science, Early Career Research Program under Award Number DE-SC-0014174. L.M. is member of the Instiut Universitaire de France. The Humboldt Foundation, the Chinese Academy of Science and CalMip is acknowledged for either financial support or computing time.','journal-iso':'Angew. Chem.-Int. Edit.','keywords-plus':'CARBON MULTIPLE BOND; MOLECULAR-STRUCTURE; METALLA-ALLENES; URANIUM COMPLEX; TRANS-INFLUENCE; U-IV=C; REACTIVITY; LIGAND; CHEMISTRY; PH2PNSIME3','number-of-cited-references':'42',oa:'Bronze','orcid-numbers':'Walensky, Justin/0000-0003-0221-2675','research-areas':'Chemistry','times-cited':'5','unique-id':'ISI:000412189700021','usage-count-last-180-days':'0','usage-count-since-2013':'9','web-of-science-categories':'Chemistry, Multidisciplinary'\International audienceThe reaction of (C5Me5)(2)Th(CH3)(2) with the phosphonium salts [CH3PPh3]X (X=Cl, Br, I) was investigated. When X=Br and I, two equivalents of methane are liberated to afford (C5Me5)(2)Th[CHPPh3]X, rare terminal phosphorano-stabilized carbenes with thorium. These complexes feature the shortest thorium-carbon bonds (approximate to 2.30 angstrom) reported to date, and electronic structure calculations show some degree of multiple bonding. However, when X = Cl, only one equivalent of methane is lost with concomitant formation of benzene from an unstable phosphorus(V) intermediate, yielding (C5Me5)(2)Th[kappa(2)-(C,C')-(CH2)(CH2)PPh2]Cl. Density functional theory (DFT) investigations of the reaction energy profiles for [CH3PPh3]X, X = Cl and I showed that in the case of iodide, thermodynamics prevents the production of benzene and favors formation of the carbene
A method for detecting the profile of an author
No full textThis paper presents a method for detecting an author’s profile using the following two elements: gender and age. This is based on a set of dialogues, written in two languages: English and Spanish, provided for Author Profiling competence within the evaluation forum "Uncovering Plagiarism, Authorship, and Social Software Misuse" (PAN2018). Counts of lexical, semantic, and syntactic characteristics are used to generate a two-phase classification system, which first classifies gender and then age. The results obtained show that, with the amount of data available, it is possible to characterize both the age and gender of an author with an accuracy greater than 50%. However, these values could be improved by having more evidence of information in the training data.Silva, JesusGarcía, SilviaBinda, María AlejandraMarin Gonzalez, FredyBarrios, RosioLeon Castro, Bellani
Síntesis de nanopartículas de NiXCO(1-X)FE2O4 utilizando microemulsiones de aceite-en-agua como medio de reacción: estudio de sus propiedades en función del tamaño de partícula y la relación Ni:CO
No full textLas ferritas de Ni–Co (Ni(x)Co(1-X)Fe2O4), con estructura cristalina tipo espinela inversa, son materiales magnéticos ideales para las aplicaciones en dispositivos de altas frecuencias y de baja señal, así como para el desarrollo de materiales rectificadores de energía térmica, debido a que pueden presentar un control térmico de los magnones a temperatura ambiente. Estos materiales son utilizados en el desarrollo de nuevos dispositivos como filtros de alta calidad, núcleos de antenas para circuitos de radiofrecuencia, núcleos para transformadores, cabezas para la escritura y lectura para cintas digitales de alta velocidad, etc. Algunos de los métodos utilizados para la síntesis de nanopartículas de ferritas tipo espinela son: método cerámico tradicional, co–precipitación química, solvotérmico, hidrotérmico, sol–gel, microemulsión agua-en-aceite (W/O) y el método de microemulsión aceite-en-agua (O/W). Entre ellos, el método de microemulsión presenta atractivas ventajas: se pueden sintetizar nanopartículas de una gran variedad de materiales con un alto grado de control en el tamaño, morfología y composición, y frecuentemente se obtiene una estructura nanocristalina. Por otro lado, es una técnica química suave y sencilla, que utiliza temperaturas cercanas a la temperatura ambiente, y no es necesario el uso de equipos sofisticados ni de grandes aportaciones de energía. Sin embargo, normalmente para obtener la fase de espinela, es necesario someter los materiales a procesos de calcinación. No obstante, en la síntesis de ferritas de Mn-Zn por el método de microemulsión O/W, se ha observado la obtención de la fase espinela sin la necesidad de calcinar, por lo cual representa un método atractivo para la obtención de ferritas de Ni-Co con buena cristalinidad bajo condiciones suaves. El presente trabajo de investigación tiene como objetivo principal la síntesis de nanopartículas de Ni(x)Co(1-x)Fe2O4 (X = 0, 0.25, 0.5, 0.75 y 1.00) con una estructura cristalina tipo espinela inversa, utilizando el método de reacción en microemulsión O/W, sin la necesidad de calcinar, así como estudiar ciertas propiedades magnéticas en función de su composición y tamaño. Se estudiaron los factores que podrían afectar el tamaño, morfología y cristalinidad de las nanopartículas obtenidas
On some singular Sturm-Liouville equations and a Hardy type inequality
No full textThe main body of this dissertation can be divided into two separate topics. The first topic deals with a Hardy type inequality for functions belonging to the Sobolev space , where and is a smooth bounded domain in , . We show that for such functions , one has [ orm{partial^kpt{frac{partial^ju(x)}{d(x)^{m-j-k}}}}_{L^1(Omega)}leq Corm{u}_{W^{m,1}(Omega)}, ] where are non-negative integers such that and , and is a smooth positive function which coincides with near . The second topic deals with the study of the singular Sturm-Liouville operator {,} where . We develop a linear theory for such operator by introducing suitable weighted Sobolev spaces and prove existence and uniqueness for equations of the form under both homogeneous and non-homogeneous boundary data at the origin. In addition, the spectrum of the operator is fully described. Finally, we prove existence, non-existence and uniqueness results for positive solutions of the non-linear singular Sturm-Liouville equation , where , and are parameters.Ph. D.Includes bibliographical referencesIncludes vitaby Hernán Castr
Outline of Fungi and fungus-like taxa – 2021
No full textWszyscy autorzy: Wijayawardene N. N., Hyde K. D., Dai D. Q.; Sanchez-Garcia M., Goto B. T., Saxena R. K.; Erdogdu M.; Selcuk F., Rajeshkumar K. C., Aptroot A., Blaszkowski J., Boonyuen N., da Silva G. A., de Souza F. A., Dong W., Ertz D., Haelewaters D., Jones E. B. G., Karunarathna S. C., Kirk P. M., Kukwa M., Kumla, J., Leontyev D. V., Lumbsch H. T., Maharachchikumbura S. S. N, Magurno Franco, Martinez-Rodriguez P., Mesic A., Monteiro J. S., Oehl F., Pawlowska J., Pem D., Pfliegler W. P., Phillips A. J. L., Posta A., He M. Q., Li J. X.; Raza M., Sruthi O. P., Suetrong S., Suwannarach, N., Tedersoo, L., Thiyagaraja V., Tibpromma S., Tkalcec Z., Tokarev Y. S., Wanasinghe D. N., Wijesundara D. S. A., Wimalaseana S. D. M. K., Madrid H., Zhang G. Q., Gao Y., Sanchez-Castro I., Tang L. Z.; Stadler M., Yurkov A.; Thines M.This paper provides an updated classification of the Kingdom Fungi (including fossil fungi)
and fungus-like taxa. Five-hundred and twenty-three (535) notes are provided for newly introduced
taxa and for changes that have been made since the previous outline. In the discussion, the latest
taxonomic changes in Basidiomycota are provided and the classification of Mycosphaerellales are
broadly discussed. Genera listed in Mycosphaerellaceae have been confirmed by DNA sequence
analyses, while doubtful genera (DNA sequences being unavailable but traditionally
accommodated in Mycosphaerellaceae) are listed in the discussion. Problematic genera in
Glomeromycota are also discussed based on phylogenetic results
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