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Filmes Biodegradáveis: Incorporação de Microfibras e Nanofibras de Celulose Obtidas de Fontes VegetaisPelículas biodegradables: la incorporación de microfibras y nanofibras de celulosa obtenido a partir de fuentes vegetales
(Universidad Nacional Abierta y a Distancia, UNAD, 2011-04-13)
Different studies have shown that cellulose incorporated into polymeric matrices acts as a reinforcing material that improves the mechanical strength of biodegradable films and, in some cases, the water vapor permeability. The efficacy of this reinforcement is associated with the nature of cellulose, its crystallinity, and the characteristics of the reinforcement/polymeric matrix interface. Studies on cellulose micro ...
Analysis of methyl ester suffocation using density functional theory at b3 lyp/6-31g(d) level
(Universidad Nacional Abierta y a Distancia, UNAD, 2009-08-14)
A mechanism for the sulfonation of methyl esters with sulfur trioxide is proposed herein. Reactions were studied in a falling film reactor and stability of the intermediate species verified by Density Functional Theory calculations at the B3LYP/6-31G(d) level. Mechanistic suppositions and experimental facts asserted a second order kinetic.
Review: equipment for anionic surfactant manufacture from oil palmRevisión: Maquinaria usada para la elaboración de surfactantes aniónicos derivados del aceite de palma
(Universidad Nacional Abierta y a Distancia, UNAD, 2010-05-08)
In the present study is performed a review of the current processes of sulfonation of various raw materials for determine the process conditions in order to present the state of the art of sulfonation processes for the manufacture of anionic surfactants. There has been a scientific literature with emphasis on several aspects: Technology, sulfonation reactors and operating conditions in the process, analytical techniques ...
Nota Editorial
(Universidad Nacional Abierta y a Distancia, UNAD, 2009-08-14)
¡Ser ingeniero de alimentos….Consejo de un padre al hijo…! El camino de formación del verdadero ingeniero de alimentos es exigente, requiere de dedicación y esfuerzo para lograr ser un profesional idóneo al ejercer su labor éticamente. Es buena profesión. Aunque tiene un historial de pocos años, sus tradiciones son profundas y propias.
Rate Proposal for Remuneration of Air Pollutants Emissions From Stationary Sources Located in Bogota D.C.Propuesta de Tasa Retributiva por Emisiones de Contaminantes Atmosféricos Provenientes de Fuentes Fijas Ubicadas en Bogotá D.C.
(Universidad Nacional Abierta y a Distancia, UNAD, 2011-04-13)
The objective of this project is to develop a methodological proposal for the establishment of the retributive rate for the direct use of the atmosphere as the receptor of pollutant emissions that come from stationary resources on Bogotá D.C. By means of the emissions from stationary sources inventory and the air quality analysis, the pollutant that are emitted by the industries and the ones that are regulated by the ...
Design of an experimental model to study the behavior of unsaturated fats in the preparation of meat emulsionsDiseño de un modelo experimental para estudiar el comportamiento de las grasas insaturadas en la elaboración de emulsiones cárnicas
(Universidad Nacional Abierta y a Distancia, UNAD, 2009-08-14)
The essence of a good experimental position consists on projecting an experiment so that him it is able to in fact give therefore the type of information that is looked for, by means of the development of the present work it is looked for to determine which the quality of the meat products will be elaborated with unsaturated vegetable fats, which its yield will be and for ende its cost regarding the traditional products, ...
Efecto de Inhibidores de Pardeamiento y la Técnica de Atmósfera Modifcada en Mango (Mangifera Indica L) Variedad Van Dyke Mínimamente Procesado
(Universidad Nacional Abierta y a Distancia, UNAD, 2008-06-15)
El mango (Mangifera indica L) variedad Van Dyke es un fruto apetecido a nivel nacional e internacional por su agradable aroma, intenso color amarillo y buen balance de ácidos/azúcares. La investigación se desarrolló en dos etapas. En la primera se determinó la respuesta de los trozos de fruto a la aplicación de tres inhibidores de pardeamiento en dos concentraciones: (ácido cítrico a 150 y 300 ppm; ácido ascórbico a ...
Locticacid bacteria: funcionality, polysaccharides, therapeutic potencial and applications in foodReview: bacterias lácticas: funcionalidad, polisacáridos, potencial terapéutico y aplicaciones en alimentos
(Universidad Nacional Abierta y a Distancia, UNAD, 2008-06-15)
This review shows the recent acid lactic bacteria advances, their functional and therapeutic potential, synthesis of polisaccharides and their possibilities of application in the cultures of starter industry, foods and healthful-foods. There are included topics that go from the origin of the lactic acid bacteria (LAB), tipic and industrial products applications, their biological and genetic characteristics, description ...
Bio-Detergent oil derivative used fryingBio-detergente derivado de aceite usado de fritura
(Universidad Nacional Abierta y a Distancia, UNAD, 2011-04-13)
Currently, the global trend towards sustainable development for environmental friendly products such as biosurfactants shows an excellent performance. Anionic surface active agents can be produced from renewable natural raw materials such as vegetable oils mainly derived from palm oil. Methyl ester sulfonate is an active component of highly biodegradable detergents, one advantage compared with detergents derived from ...
OBTENTION OF RAW FIBER FOR HUMAN CONSUMPTION DERIVED OF ROASTED PEEL CACAOObtención de fibra cruda para consumo humano a partir de la cascara de cacao tostado
(Universidad Nacional Abierta y a Distancia, UNAD, 2010-05-08)
The objective of this article is to present a possible use of roasted cocoa hulls, which currently represents an industrial surplus in the grain processing industries, and is sold with companies that produce concentrates for animals. On daily processing plants will produce about 4 tons of roasted cocoa peel, this would be a great source to produce fiber for human consumption. The present investigation was consist in ...