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1
artículo
La2O3/CaO catalysts were prepared at different weight percentages of La2O3.Por the coprecipitation method described porRaO, CaCO3 is prepared and then it was impregnated in a solution of La (NO) 3.6H2O thus obtaining the catalyst precursor . precursors dried at 393K and calcined at 973K, obtaining 0-15% La2O3/CaO catalysts. XRF elemental qualitative analysis was performed. By FTIR carbonates adsorbed species was observed. The presence of La2O3 and CaO phases was confirmed by XRD and BET surface area of the catalyst giving values ​​less than 9m2 / g The measurement of the activity for La2O3/CaO cataluzador 15% was measured, it was performed in a microreactor quartz, using a feed rate of methane / oxygen ratio of 4:1 and the reaction temperatures of 923, 973 and 1023 K, resulting in a maximum conversion temperature of 1023K of 26.84% methane conversion and selectivity to C2 + of 38.17%...
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artículo
lt has been prepared six multiphasic masic catalysts of the Fe-Mo-Sb system, which were characterized by X-ray difraction, Mossbauer Spectroscopy, BET and scanning electronic microscopy. All catalysts were tested in the reaction of oxidative dehydrogenation of ethanol to acetaldehyde. The catalyst Fe2(MoO4)3 + α-Sb2O4 was showed the highest yield and selectivity to acetaldehyde following by FeSbO4 of all prepared catalysts.
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artículo
In the present work are synthesized a series of oxides of the system of MgO/CaO, with different proportions in the cations, by the method of coprecipitation of Rao on carbonates precursors and their subsequent calcination to 1173 ºK. The carbonates precursors as the final oxides were analyzed by X Ray Fluorescence, Atomic Absorption and Neutronic Activation. The identification of the different crystalline phases are realized by X-rays Difraction and the presence of adsorbates carbonates species by Fourier Transformed lnfrared Spectroscopy.
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artículo
Nickel -based catalysts were prepared by impregnation and subsequent calcination at a concentration of 10 % by weight on the following substrates : clay , Ti02 , Si02 and Al 203 . These were reduced in a stream of 20 % hydrogen / nitrogen at a temperature of 350 ° C for 2 hours and were characterized by X-ray diffraction with activity measurements determined that the different supports affects performance . The increasing order of performance of the catalysts with different supports in oil hydrogenation process is as follows: clay > Ti02 > at 20 3> Si02 . Activity results show that the clay has a good performance in the hydrogenation process reaching iodine decrease of sunflower oil from 150 076 to the value of 56.77 to a temperature of 280 ° C
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artículo
The objective of this work is the transformation of fructose to 4-hydroxymethylfurfural by a dehydratation process using the 4-toluenesulfonic acid as catalyst . The reaction was carried out using solutions of fructose in water and fructose in water-acetone (50% volume) in a batch reactor at temperatures of 372 K and 348 K respectively. The yield reached a maximum of 16% to hydroxymethylfurfural, an intermediate for obtaining fuel furan.
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artículo
La2O3/CaO catalysts were prepared at different weight percentages of La2O3.Por the coprecipitation method described porRaO, CaCO3 is prepared and then it was impregnated in a solution of La (NO) 3.6H2O thus obtaining the catalyst precursor . precursors dried at 393K and calcined at 973K, obtaining 0-15% La2O3/CaO catalysts. XRF elemental qualitative analysis was performed. By FTIR carbonates adsorbed species was observed. The presence of La2O3 and CaO phases was confirmed by XRD and BET surface area of the catalyst giving values ​​less than 9m2 / g The measurement of the activity for La2O3/CaO cataluzador 15% was measured, it was performed in a microreactor quartz, using a feed rate of methane / oxygen ratio of 4:1 and the reaction temperatures of 923, 973 and 1023 K, resulting in a maximum conversion temperature of 1023K of 26.84% methane conversion and selectivity to C2 + of 38.17%...
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artículo
lt has been prepared six multiphasic masic catalysts of the Fe-Mo-Sb system, which were characterized by X-ray difraction, Mossbauer Spectroscopy, BET and scanning electronic microscopy. All catalysts were tested in the reaction of oxidative dehydrogenation of ethanol to acetaldehyde. The catalyst Fe2(MoO4)3 + α-Sb2O4 was showed the highest yield and selectivity to acetaldehyde following by FeSbO4 of all prepared catalysts.
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artículo
In the present work are synthesized a series of oxides of the system of MgO/CaO, with different proportions in the cations, by the method of coprecipitation of Rao on carbonates precursors and their subsequent calcination to 1173 ºK. The carbonates precursors as the final oxides were analyzed by X Ray Fluorescence, Atomic Absorption and Neutronic Activation. The identification of the different crystalline phases are realized by X-rays Difraction and the presence of adsorbates carbonates species by Fourier Transformed lnfrared Spectroscopy.
9
artículo
Nickel -based catalysts were prepared by impregnation and subsequent calcination at a concentration of 10 % by weight on the following substrates : clay , Ti02 , Si02 and Al 203 . These were reduced in a stream of 20 % hydrogen / nitrogen at a temperature of 350 ° C for 2 hours and were characterized by X-ray diffraction with activity measurements determined that the different supports affects performance . The increasing order of performance of the catalysts with different supports in oil hydrogenation process is as follows: clay > Ti02 > at 20 3> Si02 . Activity results show that the clay has a good performance in the hydrogenation process reaching iodine decrease of sunflower oil from 150 076 to the value of 56.77 to a temperature of 280 ° C
10
artículo
The objective of this work is the transformation of fructose to 4-hydroxymethylfurfural by a dehydratation process using the 4-toluenesulfonic acid as catalyst . The reaction was carried out using solutions of fructose in water and fructose in water-acetone (50% volume) in a batch reactor at temperatures of 372 K and 348 K respectively. The yield reached a maximum of 16% to hydroxymethylfurfural, an intermediate for obtaining fuel furan.
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capítulo de libro
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artículo
A significant group of Italian-style plays (i.e. stagings that made use of spectacular scenic resources) were performed in Lima in 1672-1747), always in connection with festivities of an imperial nature. Taking as its basis a corpus of fifteen theatrical works, this study examines the conditions of their reception as well as the material avenues that allowed for the development of this type of theater in the capital of the Peruvian viceroyalty. Topics of analysis include: the context and purpose of these representations, the place in which they were presented, their intended public, and the stage media they employed.
13
artículo
A significant group of Italian-style plays (i.e. stagings that made use of spectacular scenic resources) were performed in Lima in 1672-1747), always in connection with festivities of an imperial nature. Taking as its basis a corpus of fifteen theatrical works, this study examines the conditions of their reception as well as the material avenues that allowed for the development of this type of theater in the capital of the Peruvian viceroyalty. Topics of analysis include: the context and purpose of these representations, the place in which they were presented, their intended public, and the stage media they employed.
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15
artículo
A significant group of Italian-style plays (i.e. stagings that made use of spectacular scenic resources) were performed in Lima in 1672-1747), always in connection with festivities of an imperial nature. Taking as its basis a corpus of fifteen theatrical works, this study examines the conditions of their reception as well as the material avenues that allowed for the development of this type of theater in the capital of the Peruvian viceroyalty. Topics of analysis include: the context and purpose of these representations, the place in which they were presented, their intended public, and the stage media they employed.
16
artículo
The aim of the study was the hydrogenation reaction on a catalyst Citral Pd-Fe/MgO and the reaction selectivity towards the different products obtained. Citral hydrogenation is performed in a batch reactor at 60° C with a solution of 2-propanol as solvent. The results show that the catalyst is Pd-Fe/MgO very active in the hydrogenation of the double bond adjacent to the carbonyl in the Citral and that catalyst activity sharply declines last 10 minutes of the reaction.
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artículo
El objetivo del trabajo es estudiar la reacción dehidrogenación del Citral sobre un catalizador de Pd-Fe/MgO y la selectividad de la reacción hacia los diferentes productos obtenidos.La hidrogenación de Citral se realiza en un reactor batcha 60°C con una solución con 2-propanol como solvente. Los resultados demuestran que el catalizador de Pd-Fe/MgO es muy activo en la hidrogenación del enlacedoble adyacente al carbonilo en el Citral y que la actividad del catalizador decae fuertemente pasado los 10 minutos de reacción.
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libro
La Universidad del Pacífico y la Universidad de Navarra crean, promueven y gestionan el Proyecto de Estudios Indianos desde agosto 2014.
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libro
En este segundo volumen ofrecemos la edición de los años finales del Diario de noticias sobresalientes en Lima y Noticias de Europa (1700-1711), periódico impreso por Joseph de Contreras y Alvarado. El período aquí cubierto va de enero de 1706 a diciembre de 1711, y corresponde a los años más críticos de la Guerra de Sucesión española y, en el virreinato del Perú, a los gobiernos del marqués de Castell dos Rius y, parcialmente, del arzobispo Diego Ladrón de Guevara. Esta serie única de pliegos sueltos muestra la historia de las élites del virreinato del Perú, con sus poderosos comerciantes, y la vida cotidiana de la ciudad, con sus jerarquías y devociones populares, y revela la importancia del taller editorial e imprenta de Lima como un centro difusor de las noticias en la Monarquía Hispánica. La edición se complementa con un nuevo estudio preliminar y notas al texto ...
20
artículo
Intermittent photic stimulation (IPS) is one of the most common and well-known activation methods used during routine EEG recordings. However, although it is the most straightforwardly standardized activation technique, its methodology still has significant variability, and the interpretation and classification of photoparoxysmal response (PPR) remain largely subjective. Objective: This review aims to provide an updated reference about the standardized methodology to perform the IPS procedure. Additionally, it intends to provide an update on the interpretation and classification of the PPR. A critical analysis about current practical/clinical challenges is formulated, and some potential operational criteria to improve the interrater agreement for the confirmation of PPR are proposed. Conclusions: Proposed operational criteria include, but are not limited to morphology, amplitude, duratio...