Tópicos Sugeridos dentro de su búsqueda.
Tópicos Sugeridos dentro de su búsqueda.
Buscar alternativas:
composite design » composite resin (Expander búsqueda), composite resins (Expander búsqueda), composites resins (Expander búsqueda)
composite design » composite resin (Expander búsqueda), composite resins (Expander búsqueda), composites resins (Expander búsqueda)
1
artículo
Publicado 2012
Enlace
Enlace
The aim of the present work was to optimize the sensorial and technological features of ice cream. The experimental work was performed in two stages: 1) optimization of lactose enzymatic hydrolysis, and 2) optimization of the process and product. For the first stage a complete factorial design was developed, optimized using both response surface and the steepest ascent method. In the second stage a mixture design was performed, combining the process variables. The product with the best sensorial acceptance, high yield and low cost was selected. The acceptance of the product was developed by an untrained taster’s panel. As a main result the sensorial and technological features of the final product were improved, establishing the optimum parameters for its elaboration.
2
artículo
Publicado 2012
Enlace
Enlace
The aim of the present work was to optimize the sensorial and technological features of ice cream. The experimental work was performed in two stages: 1) optimization of lactose enzymatic hydrolysis, and 2) optimization of the process and product. For the first stage a complete factorial design was developed, optimized using both response surface and the steepest ascent method. In the second stage a mixture design was performed, combining the process variables. The product with the best sensorial acceptance, high yield and low cost was selected. The acceptance of the product was developed by an untrained taster’s panel. As a main result the sensorial and technological features of the final product were improved, establishing the optimum parameters for its elaboration.
3
artículo
Publicado 2021
Enlace
Enlace
This study aims to design and validate a nutritional recipe for a snack made of Green Banana (Musa paradisiaca) Peel Flour (GBPF) and to assess the nutritional composition and microbiological quality of the flour. Banana peel, a food industry by-product, is a nutritious, low-cost material available for all year. Banana peel flower could be used as a functional ingredient due to its high fiber content and good functional properties. In general, university students have a deficient dietary fiber intake due to altered dietary patterns; thus, this study was focused on this population. The GBPFs were obtained from the peels of pre-climacteric bananas by fluidized bed (FDB) dryer, after which, microbiological, proximate, and dietary fiber analyses were applied. It was designed the nutritional recipe for the snack taking into account the energy and dietary fiber nutritional requirements of the ...
4
artículo
Sapote gum as a new biopolymer suitable emulsion stabilizer: Grapeseed oil ultrasonic emulsification
Publicado 2025
Enlace
Enlace
Sapote gum (SG) is a new biopolymer with promissory functional properties. This study aimed to determine if SG is a suitable emulsifier for obtaining stable grape seed oil (GSO) emulsions. In the first stage, coarse emulsion concentrations of SG and grapeseed oil - GSO were evaluated, applying the Central Composite Rotational Design (0.59% to 3.41% of SG and 12.93% to 27.07% GSO). For the second stage, using a Centered Face Design – CFD, the resulting emulsion was sonicated at 90, 270, and 450 Watts at 5, 10, and 15 min. Finally, a validation was made. Emulsions were evaluated through microstructure, droplet size, kinetic stability, heat stress, and rheology. Micrographs of the first-stage emulsions showed droplets up to 3.8 μm diameter and a creaming index between 0.00% and 28.39% after 24 h. Optimization indicates that the higher the concentration of gum (3.5%) and GSO (25%), the mo...
5
artículo
Publicado 2022
Enlace
Enlace
Sacha inchi Plukenetia huayllabambana oil (SIPHO) was co-microencapsulated, by spray drying using gum arabic as a coating material, with antioxidant extracts of camu camu (Myrciaria dubia (HBK) McVaugh) (CCSE) and mango (Mangifera indica) (MSE) skins obtained by ultrasound–microwave-assisted extraction (UMAE). The physicochemical characteristics of the microcapsules, such as, particle size, morphology, and moisture, as well as the encapsulation efficiency, the fatty acid composition, and oxidative stability, were determined in order to select the best formulation for the design of functional powdered beverages. The formulation with the highest amounts of ¿3 acids and polyphenols was used to prepare a functional powdered beverage that contained ¿3 (52.74%), antioxidant activity (324.80 mg AAE/100 g powder), and acceptable sensory attributes.
6
artículo
Publicado 2009
Enlace
Enlace
The authors wish to acknowledge the assistance of B. PAGES (INRA - UE Pech Rouge) for technical assistance in the laboratory, and also Drs. B. LACOMBE and H. SENTENAC (INRA Montpellier), and M. GITNARD (INRA Avignon) for their technical and scientific advice. Thanks also to Dr. K. HUNTER (ARC Infiruitech, Stellenbosch SA) for his helpful suggestions oil the experimental design, and Dr. M. KELLY (University of Montpellier 1) for helpful discussions and for the English translation of this article. This work was partially financed by the Embassy of France in Peru and the Peruvian government (CONCYTEC), the French ministry of Foreign affairs (Eiffel Doctoral grants programme), and the General Counsel of the Wraith, France.
7
artículo
Publicado 2021
Enlace
Enlace
The Rietveld refinement method has taken high relevance since its creation. Nowadays, it is an useful tool in many fields of industry, materials science, and technology. For these reasons, it becomes a need for scientists and engineers whom pretend to use it for proper analysis of their materials. However, the initiation in the method can be slow, taking into account the accelerated rhythm of the research and economic demands. Thus, this work is an intend to fulfill this hole, providing the basic foundations and methodology of the Rietveld refinement in a brief way, this along with the results of its application in superconducting samples of Yttrium Barium Copper Oxide and magnesium diboride, and functional magnetic nanoadsorbents of maghemite and a multiphasic composite (iron oxide, hydroxyapatite and secondary phases). In the process, an in-detail protocol was designed and provided. It...
8
artículo
Publicado 2023
Enlace
Enlace
The aim of this study was to evaluate the effect of the genotype on the deposition curve of the chemical components and fatty acid profile of carcass of guinea pigs of Peru and Cieneguilla genotypes. Forty-eight male guinea pigs (24 per genotype), randomly distributed in pens with three animals each per genotype were used. Management and feeding protocols, up to 32 wk of age, were similar for both genotypes. The deposition curve of the chemical components was determined using the Gompertz equation. Data of the fatty acid profile were submitted to analysis of varianza under a Randomized Complete Block Design using the SAS Studio Environment software, with a significance level of α = 0.05. The results showed that the asymptote of the moisture and protein content in the carcass of the Peru genotype was higher (P < 0.05) than that of Cieneguilla genotype, but not in the fat content, whic...
9
tesis de maestría
Publicado 2025
Enlace
Enlace
Artículo sustentado el 02 de diciembre 2025 para la obtención del grado académico de Maestro en Ciencias de la Ingeniería.
10
artículo
Publicado 2020
Enlace
Enlace
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
11
artículo
Publicado 2019
Enlace
Enlace
Juan D. Rios-Mera and Erick Saldaña are grateful to the support of the Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica – CONCYTEC, from Peru (CIENCIACTIVA programme, PhD scholarship contracts: No. 238-2018-FONDECYT and No. 104-2016-FONDECYT). Juan D. Rios-Mera is also grateful for the scholarship granted by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPES, from July 2017 to January 2019.
12
tesis de grado
El diseño estructural en sección compuesta ha tomado gran importancia a nivel ingenieril, gracias a las ventajas de usar diferentes materiales para crear un elemento con propiedades mejoradas. En relación a este gran avance, el campo de diseño se ha visto en la obligación de crear normas o reglamentos que tomen en cuenta el correcto funcionamiento de dicho sistema. Por ello, el diseño se debe regir en principios o filosofías que brinden la seguridad; uno de los principales principios es el estado límite de servicio, cuyo principio es asegurar el correcto desempeño estructural tanto la funcionabilidad como la seguridad. A través de los años, el comportamiento, en dicho estado, es asumido en rango elástico, ya que se diseña con la suposición de que los elementos trabajan elásticamente y en consecuencia sus respuestas estructurales también. Por tal motivo, las respuestas est...
13
artículo
Publicado 2023
Enlace
Enlace
Purpose: The theoretical debate of corruption's impact on economic growth remains unsettled, making it an empirical question. This study aims to investigate corruption's effect on BRICS countries' economic growth. Design/methodology/approach: A panel dataset on BRICS countries spanning 1996 to 2020 was used. Bias-corrected estimators in small dynamic panels were employed to estimate a growth model as a linear-quadratic function of corruption that accounts for cross-sectional dependence, endogeneity and unobserved heterogeneity due to country and time-specific characteristics. Findings: The results indicate that corruption is detrimental to economic growth in BRICS countries; the quadratic relationship implies corruption is less prevalent in some countries than others. Thus, governments of BRICS countries are encouraged to embark on anti-corruption policies to boost their economic perform...
14
Publicado 2018
Enlace
Enlace
El objetivo de este trabajo de investigación es dar a conocer que en el diseño arquitectónico, se consideran tanto las formas geométricas planas como el cuadrado, el círculo y el triángulo, como los volúmenes tridimensionales creados por ellas, como el cubo, el prisma, la esfera, la pirámide y el cono, cuando se analiza la relación entre función y forma. El arquitecto logra crear una composición que conformará la estructura exterior de la edificación mediante la combinación de estas formas tridimensionales y el uso de operaciones de adición o sustracción, o ambas. La configuración arquitectónica ha sido constante desde épocas ancestrales, y cada cultura ha desarrollado su propia identidad arquitectónica, con similitudes o diferencias con otras culturas. Posteriormente, surgió el Funcionalismo como una tendencia arquitectónica. En su origen se encuentra la raíz de e...
15
tesis de maestría
Publicado 2015
Enlace
Enlace
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Tecnología de Alimentos
16
artículo
Publicado 2017
Enlace
Enlace
In the present work, two experimental designs were carried out to find the optimal conditions to manufacture nylon nanowires and to synthesize graphene. The results obtained were: 0.68 M (NH4)2SO4 and 11.45 V; and 27 kV, 2.3 mL / h and 11.40 cm as the distance from the needle to the collector, respectively. This way, nylon nanowires and graphene were produced, both of nanometric size. Using these materials, a nanowire/graphene composite was prepared using optimum manufacturing conditions. The materials obtained (nylon nanowires, graphene and composite) were characterized morphologically (SEM) and chemically (FTIR, UV), verifying their nanometric scale, functional groups and their UV blocking properties. This work opens new perspectives for the use of recycled nylon to obtain electrospinned nano‐fibers that can be functionalized, in this case with graphene, and exhibit interesting prope...
17
artículo
Publicado 2017
Enlace
Enlace
In the present work, two experimental designs were carried out to find the optimal conditions to manufacture nylon nanowires and to synthesize graphene. The results obtained were: 0.68 M (NH4)2SO4 and 11.45 V; and 27 kV, 2.3 mL / h and 11.40 cm as the distance from the needle to the collector, respectively. This way, nylon nanowires and graphene were produced, both of nanometric size. Using these materials, a nanowire/graphene composite was prepared using optimum manufacturing conditions. The materials obtained (nylon nanowires, graphene and composite) were characterized morphologically (SEM) and chemically (FTIR, UV), verifying their nanometric scale, functional groups and their UV blocking properties. This work opens new perspectives for the use of recycled nylon to obtain electrospinned nano‐fibers that can be functionalized, in this case with graphene, and exhibit interesting prope...
18
artículo
Publicado 2021
Enlace
Enlace
The implementation of efficient grazing technologies in high mountain cattle ranches in the department of Nariño (Colombia) increases the sustainability of these production systems and promotes the conservation of the landscape design. With the objective of evaluating the dry matter intake of F1 (Kiwi-cross x Holstein) and Holstein cattle biotypes, present in hillside areas of the Nariño mountain, a preliminary trial of individual consumption of ryegrass (Lolium perenne) was carried out in Pasto (Nariño-Colombia) with the gauging technique, and the results were compared with models reported in the literature. The data were analyzed as a completely randomized design, with repeated measures over time. Intake per gauging was higher (p<0.05) in Holstein cows, with respect to F1 cows (12.74 vs. 9.69 kg/dry-matter/day), but per unit live weight was similar (p>0.05). On the other hand,...
19
artículo
Publicado 2021
Enlace
Enlace
The implementation of efficient grazing technologies in high mountain cattle ranches in the department of Nariño (Colombia) increases the sustainability of these production systems and promotes the conservation of the landscape design. With the objective of evaluating the dry matter intake of F1 (Kiwi-cross x Holstein) and Holstein cattle biotypes, present in hillside areas of the Nariño mountain, a preliminary trial of individual consumption of ryegrass (Lolium perenne) was carried out in Pasto (Nariño-Colombia) with the gauging technique, and the results were compared with models reported in the literature. The data were analyzed as a completely randomized design, with repeated measures over time. Intake per gauging was higher (p<0.05) in Holstein cows, with respect to F1 cows (12.74 vs. 9.69 kg/dry-matter/day), but per unit live weight was similar (p>0.05). On the other hand,...
20
tesis de grado
Publicado 2019
Enlace
Enlace
El comportamiento de la losa compuesta está condicionado, principalmente, por la interacción que existe entre el concreto y la placa colaborante, la conexión entre estos dos elementos es proporcionada por la adherencia química y mecánica que existe en la interfaz de los materiales que conforman la losa compuesta. Para el estudio de esta propiedad se han realizado una serie de ensayos a escala natural, como los ensayos a flexión, para identificar principalmente la carga de desprendimiento, que está directamente relacionada a la resistencia al corte longitudinal de la losa y que puede ser apreciada en la historia del comportamiento frente a cargas de flexión. Asimismo, se han realizado ensayos de corte directo longitudinal (Pull-out) en porciones de losa para poder cuantificar la adherencia a través de la carga máxima aplicada en la interfaz. El estudio de la resistencia al corte...
