Resultados de búsqueda - "vacuum"

Chemical Composition and Biological Activities of Oregano Essential Oil and Its Fractions Obtained by Vacuum Distillation por Rostro Alanís, Magdalena de Jesús, Báez González, Juan Gabriel, Torres Álvarez, Cynthia, Parra Saldívar, Roberto, Rodríguez Rodríguez, José, Castillo, Sandra

“…Aiming to achieve the best use of this resource, the present study focuses on the characterization of separated fractions of Ooil by fractional vacuum distillation at low pressure. Four fractions (F1−F4) and undistilled oil (Unoil) were separated from Ooil and analyzed for their chemical composition and biological activities, such as antioxidant and antimicrobial activities. …”
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La materia y lo imaginario o de la danza de maya en el vacío = the Matter and the Imaginary or the Dance of Mayan in the Vacuum. por ADOLFO BENITO NARVAEZ TIJERINA

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Reducción de los tiempos de cambio de modelo en los productos fabricados en una empresa manufacturera de aspiradoras por Morales Rodríguez, Mario Alberto, Cervantes Zubirías, Gabriela, Wong Gallegos, Juan Yared, Martínez Mendoza, Ronaldo

“…Reduction of model change times in products manufactured in a vacuum manufacturing company…”
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A calculation of the physical mass of sigma meson por Morones Ibarra, José Rubén, Santos Guevara, Ayax

“…We calculate the physical mass and the width of the sigma meson by considering that it couples in vacuum to two virtual pions. The mass is calculated by using the spectral function, and we find that it is about 600 MeV. …”
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Mass shift of σ-meson in nuclear matter por Morones Ibarra, José Rubén, Menchaca Maciel, Mónica del Carmen, Santos Guevara, Ayax, Robledo Padilla, Felipe Ángel

“…It is found that the σ-meson mass decreases with respect to its value in vacuum and that the contribution of the σ–ω mixing effect on the mass shift is relatively small.…”
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Efecto del aceite de orégano en la carne de bovino por Reynoso-Escobedo, H., Luna-Maldonado, A. I., García-Treviño, N.E., Sinagawa-García, S.R., Rico-Costilla, D.S., Flores-Girón, E., Méndez-Zamora, G.

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Synthesis and characterization of metal nanoparticles by pulsed laser ablation in liquid media (PLAL) por Mendivil Palma, María Isabel

“…In this thesis we report an easy, fast, alternative-novel and one-step method for the preparation of pure and stable (in some cases) noble metal nanoparticles, viz Pulsed Laser Ablation in liquid media; this method presents significant advantages over chemical routes as: pure metal nanoparticles production, less aggregation, non-vacuum requirements, non-toxic agents are required, size and shape tunability, between others. …”
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Alternative calculation of the physical mass of the p-meson por Morones Ramírez, Rubén, Mejía Rosales, Sergio

“…We have derived an expression for the physical mass and width of the ρ-meson in vacuum from its spectral function, calculated in the vector meson dominance model when a ρ 0 meson couples to two virtual pions π +–π −. …”
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Synthesis and characterization of metal nanoparticles by pulsed laser ablation in liquid media (PLAL) por Mendivil Palma, María Isabel

“…In this thesis we report an easy, fast, alternative-novel and one-step method for the preparation of pure and stable (in some cases) noble metal nanoparticles, viz Pulsed Laser Ablation in liquid media; this method presents significant advantages over chemical routes as: pure metal nanoparticles production, less aggregation, non-vacuum requirements, non-toxic agents are required, size and shape tunability, between others. …”
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Recent Advances in Synthesis and Properties of Hybrid Halide Perovskites for Photovoltaics por Vidyasagar, C. C., Muñoz Flores, Blanca M., Jiménez Pérez, Víctor Manuel

“…The power conversion efficiency has been up to 14% by a one-step vacuum deposition technique. A serious concern is the toxicity of the materials. …”
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Copper antimony sulfide thin films by spray pyrolysis for photovoltaic applications. por Aquino Ramos, José Agustín

“…The spray pyrolysis technique is a chemical deposition that it does not need vacuum and also the process is carried at low temperatures near 500 �C. …”
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Experimental study of the influence of stitched nylon threads in glass-fiber-reinforced polymer two-dimensional multilayer composite on tensile strength por Lira Martínez, Manuel Alejandro, Gaona Tiburcio, Citlalli, Almeraya Calderón, Facundo, Jáquez Muñoz, Jesús Manuel, Zalapa Garibay, Manuela Alejandra

“…This research focuses on the study of the tensile strength effect of stitched low-density Barkley FBA BGQS15-15 nylon monofilament on biaxial E-Glass Saertex 830 g/m2 (+/−45◦) cured with Polyester Sypol Resin 8086 CCP using a vacuum infusion process. Four specimens were made with longitudinal distances between the stitched reinforcements of 0.5, 1.0, 1.5, and 2.0 cm, respectively. …”
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Copper antimony sulfide thin films by spray pyrolysis for photovoltaic applications. por Aquino Ramos, José Agustín

“…The spray pyrolysis technique is a chemical deposition that it does not need vacuum and also the process is carried at low temperatures near 500 �C. …”
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Chemical bath deposition route for the synthesis of ultra-thin CuIn(S,Se)2 based solar cells. por Lugo Loredo, Shadai, Sánchez González, Yudania, Neuschitzer, Markus, Xie, Hai Bing, Insignares Cuello, Cristina, Izquierdo Roca, Victor, Peña Méndez, Yolanda, Saucedo, Edgardo

“…CuIn(S,Se)2 (CISSe) photovoltaic grade thin films are usually grown by expensive vacuum based methods or chemical routes that require highly toxic precursors. …”
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Experimental study of the influence of stitched nylon threads in glass-fiber-reinforced polymer two-dimensional multilayer composite on tensile strength por Lira Martínez, Manuel Alejandro, Gaona Tiburcio, Citlalli, Almeraya Calderón, Facundo, Jáquez Muñoz, Jesús Manuel, Zapala Garibay, Manuela Alejandra

“…This research focuses on the study of the tensile strength effect of stitched low-density barkley FBA BGQS15-15 nylon monofilament on biaxial e-glass saertex 830 g/m2 (+/−45°) cured with polyester sypol resin 8086 CCP using a vacuum infusion process. Four specimens were made with longitudinal distances between the stitched reinforcements of 0.5, 1.0, 1.5, and 2.0 cm, respectively. …”
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Thin films of arsenic sulfide by chemical deposition and formation of InAs por Peña Méndez, Yolanda, Nair Maileppallil, Santhamma, Nair Padmanabhan, Karunakaran

“…We report a method for obtaining thin films of arsenic sulfide by chemical bath deposition and the subsequent formation of InAs by heating the films with a vacuum-deposited coating of In. X-ray diffraction (XRD) studies have shown that the thin film deposited from chemical baths of pH ∼2, prepared by mixing aqueous acidic solutions of As(III) with sodium thiosulfate, is a composite film of crystalline As2O3 and As2S3, with the incorporation of sulfur. …”
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Effect of Three Types of Drying on the Viability of Lactic Acid Bacteria in Foam-Mat Dried Yogurt por Gallardo Rivera, Claudia Tomasa, Báez González, Juan Gabriel, García Alanís, Karla G., Torres Álvarez, Cynthia, Dares Sánchez, Karla, Szymanski, Ana, Amaya Guerra, Carlos Abel, Castillo, Sandra

“…Abstract: In this research, foaming technology was applied to obtain powdered yogurt from commercial yogurt at lower temperatures than the typical temperatures used during the dehydration process; the viability of lactic acid bacteria (LAB) was evaluated after the application of different drying techniques (conventional drying, freeze drying, and vacuum drying). Three different formulas (F1, F2, and F3) based on a foaming agent (albumen), stabilizers (guar gum), and prebiotics sources (inulin and agave syrup) were developed. …”
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Effects of Nb additions and heat treatments on the microstructure, hardness and wear resistance of CuNiCrSiCoTiNbx high-entropy alloys por Avila Salgado, Denis Ariel, Juárez Hernández, Arturo, Lara Banda, María, Bedolla Jacuinde, Arnoldo, Guerra, Francisco V.

“…Abstract: In this research, a set of CuNiCrSiCoTi (H-0Nb), CuNiCrSiCoTiNb0.5 (H-0.5Nb) and CuNiCrSiCoTiNb1 (H-1Nb) high-entropy alloys (HEAs) were melted in a vacuum induction furnace. The effects of Nb additions on the microstructure, hardness, and wear behavior of these HEAs (compared with a CuBe commercial alloy) in the as-cast (AC) condition, and after solution (SHT) and aging (AT) heat treatments, were investigated using X-ray diffraction, optical microscopy, and electron microscopy. …”
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La satisfacción laboral en instituciones educativas públicas: una perspectiva teórica por Treviño-Reyes, Rosalba, Segovia-Romo, Adriana

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Derechos Humanos del Niño o Adolescente en el Curso de Adopción del Tribunal de Justicia del Estado de Goiás, Brasil. por Carvalho Corrêa, Edwiges Conceição, Rosa de Souza, Rodrigo, Macêdo, Maurides

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