3,530 research outputs found
Student Author- Andres Castillo, March 26, 2024
No full textFayetteville State University student author Andres Castillo speaks at the Chesnutt Library of Fayetteville State University about his book My Life Journey with Autism as a Military Child.
Presented live on March 26, 2024 as part of Chesnutt Library\u27s Faculty Author Series.https://digitalcommons.uncfsu.edu/faculty_author/1006/thumbnail.jp
Data solubility and parameters of adjustments (α and β) of phenanthrene in supercritical CO2 employing the modified Redlich–Kwong equation
No full textThis article contains data related to the research article entitled “Calculation method for determining Phenanthrene solubility in supercritical CO2 employing Redlich–Kwong modified equation” (Colpas et al., 2018) [1]. The presented data gives information on the physical properties of the solute and the solvent. The experimental solubilities of phenanthrene in equilibrium and those calculated using the modified Redlich–Kwong equation with the inclusion of the adjustment parameters α and β are shown, see Colpas et al. (2018) [1] and “Modified Redlich–Kwong equation of state for supercritical carbon dioxide” (Heidaryan and Jarrahian, 2013) [7]. The mean squared error (MSE) was calculated for the supercritical Phenanthrene–CO2 system at different temperatures above the critical point of the solvent
An Easy Method to Prepare D3 and C2-TATP Crystals
No full textD3 and C2 TATP structures interconvert at room temperature. Herein, an easy method to isolate both conformers is shown that consists of multiple recrystallization steps using different solvent and heating to boiling. Spectroscopic and physical measurements, such as Raman spectroscopy, X-ray diffraction, and melting point analysis, showed that clear and opaque crystals, respectively, represent different conformations of TATP. Additionally, the transition energy between both conformers was estimated using the Raman shifts.Espinosa Fuentes, Eduardo Antonio-4a2aee36-a6fd-4d38-92d3-66e15483bf70-0Colpas Castillo, Fredy-a58dfeef-b7d3-4dd6-b70d-f3ac2c117bf8-0Meza Fuentes, Edgardo-48e4de07-6e97-4229-9267-6ccec7edc159-0Ropero, Jorge-6f3ff826-2f63-4c62-a4a3-f49661251c1e-
Description of the last stadium larva of Erythrodiplax abjecta (Anisoptera: Libellulidae) from the eastern Colombian Andes
No full textPalacino-Rodríguez, Fredy, Rache-Rodríguez, Leonardo, Castillo, Daniel R. (2019): Description of the last stadium larva of Erythrodiplax abjecta (Anisoptera: Libellulidae) from the eastern Colombian Andes. Zootaxa 4545 (1): 139-145, DOI: 10.11646/zootaxa.4545.1.
Theoretical study of the humic acid interactions with Al3+, Ca2+, Mg2+, Zn2+, K+ and NH4+ cations at DFT level of theory and PCM solvation model
No full textIn this paper, two models of humic acids, the Temple-Northeastern-Birmingham (TNB) and Kolla models, were studied. Also, the complexation reaction of the structures formed by the interaction of the TNB and Kolla models with Al3+, Ca2+, Mg2+, Zn2+, K+ and NH4+ cations, common in agricultural soils, was studied. These calculations were made for the complexes, at PM6 and DFT/LANL2DZ level of theory, both in vacuum and in aqueous medium. We found a strong affinity between Kolla and TNB models, and Al3+, Ca2+, Mg2+, Zn2+, K+ and NH4+ cations, influenced by the solvent that affected the interaction sites; the solvent increased the rate of reactivity and affinity for the cations in nucleophilic regions and decreased it in electrophilic regions of the structures. Calculations of molecular electronic potential, MEP and atomic charges, the local smoothness, Fukui functions and the HSAB principle adequately described the HA/cations interactions which were affected by the number of hydrogen bonds. The most reactive sites were the hydroxyl, phenolic, carbonyls oxygens and nitrogens at both vacuum and aqueous medium, especially carbonyl oxygens. These results are consistent with the properties of HA that make them attractive as components of agricultural soils.Espinosa Fuentes, Eduardo Antonio-4a2aee36-a6fd-4d38-92d3-66e15483bf70-600Colpas Castillo, Fredy-a58dfeef-b7d3-4dd6-b70d-f3ac2c117bf8-600Meza Fuentes, Edgardo-48e4de07-6e97-4229-9267-6ccec7edc159-60
YAP Constructo 2010: Arquitecto Eduardo Castillo
No full textCastillo, E (reprint author), Univ Talca, Talca, Chile
Design of an electronic voting system using A blockchain network
No full textDesign of a scalable electronic voting system, which, based on a
generic model designed for this application called voting cell, guarantees the
integrity of the information through the use of a private network Blockchain.
For the validation of the system, the implementation of a cell was carried out,
for which fifty voters and three voting options were enabled. The stored data
was intentionally modified to corroborate the error correction method used by
the block chain networks and thus ensure the integrity of the voting system
results.Ribon, Carlos A.Leon, Javier M.Corredor, Oscar F.Castellanos, Hermes E.Sanz, Fredy A.Ariza Colpas, Paola Patricia-will be generated-orcid-0000-0003-4503-5461-600Landero, VanesaCollazos-Morales, Carlo
Castillo de Chapultepec: Ciudad de México
No full textLa información de esta miniguía se basa en los trabajos de Rubén M. Campos y el proyecto de conservación arquitectónica del Museo Nacional de Historia.El Castillo de Chapultepec, sede del Museo Nacional de Historia, se encuentra ubicado en la prominencia natural más elevada del valle de México. El pasado conocido del cerro del Chapulín se remonta al siglo Xlll, cuando fue asentamiento de grupos nahuas que buscaron el control de manantiales de aguas dulces y limpias. Según la Tira de la Peregrinación, antes de fundar Tenochtitlán los mexicas se establecieron en este lugar, pero fueron expulsados. Desde finales del siglo XVl, los tlatoanis tenochcas consideraban a Chapultepec un importante lugar de culto religioso y de recreo: fueron construidos entonces un adoratorio en la parte alta del cerro y los famosos baños de Moctezuma en la falda.</p
Un método fácil de preparar cristales d3 y c2-tatp.
No full textD3 and C2 TATP structures interconvert at room temperature. Herein, an easy method to isolate both conformers is shown that consists of multiple recrystallization steps using different solvent and heating to boiling. Spectroscopic and physical measurements, such as Raman spectroscopy, X-ray diffraction, and melting point analysis, showed that clear and opaque crystals, respectively, represent different conformations of TATP. Additionally, the transition energy between both conformers was estimated using the Raman shiftsLas estructuras D3 y C2 TATP se interconvierten a temperatura ambiente. En este documento, se muestra un método fácil para aislar a los dos conformadores que consiste en múltiples etapas de recristalización que utilizan diferentes disolventes y calentamiento a ebullición. Las medidas espectroscópicas y físicas, como la espectroscopia Raman, la difracción de rayos X y el análisis del punto de fusión, mostraron que los cristales claros y opacos, respectivamente, representan diferentes conformaciones de TATP. Además, la energía de transición entre ambos conformadores se estimó utilizando los turnos RamanEspinosa Fuentes, Eduardo Antonio-4a2aee36-a6fd-4d38-92d3-66e15483bf70-0Colpas Castillo, Fredy-a58dfeef-b7d3-4dd6-b70d-f3ac2c117bf8-0Meza Fuentes, Edgardo-48e4de07-6e97-4229-9267-6ccec7edc159-0Ropero, Jorge-6f3ff826-2f63-4c62-a4a3-f49661251c1e-
Murales del Castillo de Chapultepec: Ciudad de México
No full textEn 1939 el presidente Lázaro Cárdenas lo declaró Museo Nacional de Historia, con lo que adquirió la nueva función que hasta hoy mantiene. Por todo ello el Castillo de Chapultepec se ha convertido en centinela de valiosos objetos que nos ayudan a entender el periodo republicano de nuestra historia, y así se ha conformado como un espejo vivo de los notables personajes que deambularon por sus patios y salones. Con todo ello, el Castillo de Chapultepec presenta una faceta educativa. De ahí que en muchas de sus salas se hayan destinado gran des espacios para distintas pinturas murales que contribuyen a ilustrar y sintetizar un determinado acontecimiento nacional. Cada artista, de ese modo, contribuye con su estilo a explicar el contexto de los grandes momentos de la Patria. Aquí cabe recordar que el muralismo mexicano fue un movimiento muy peculiar. Heredero de la Revolución de 1910, muy pronto se volcó en la exaltación nacionalista del arte público. Pintores como Diego Rivera, José Clemente Orozco y David. A. Siqueiros, se distinguieron como protagonistas de ese arte derramándose sobre los muros de muchísimos edificios públicos.</p
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