Facultad Regional San Francisco: Materiales subidos recientemente
Mostrando ítems 401-420 de 555
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Preparation of gel alcohol flavored with essential oils. An employ of laboratory techniques in the organic chemistry study
(2017)The main aim of this work is to teach chemistry through a practical application. In it is described a chemical experiment for high school students. They learn fundamental concepts through the preparation of gel alcohol ... -
Introducing organic chemistry students to the extraction of natural products found in vegetal species
(2017)This work constitutes a new strategy for teaching-learning the chemistry of natural products, being the students active participants in the process. Results showed in this activity contributed not only to the understanding ... -
Synthesis and encapsulation of bis-eugenol in a mesoporous solid material: Enhancement of the antioxidant activity of a natural compound from Clove Oil.
(2018)In the present work, microwave extraction conditions to recover high eugenol content in the crude extract from clove were investigated. The effect of factors like temperature, stirring, time, liquid: Solid ratio and solutions ... -
Teaching of chemistry applied. Development of a laboratory-scale fire started
(2018)The present laboratory work based in the preparation of fire started is proposed as an alternative in the teaching of chemistry for students of high school, with the purpose of articulate and integrate the abilities of ... -
Mesoporous materials as supports of active molecules: a versatile strategy of functionalization of inorganic oxides
(2019)Ordered mesoporous silica and alumina were functionalized with vanillin, eugenol and their bis-compounds through a microwave assisted process. The physicochemical charac-terization of these materials confirmed the successful ... -
Antioxidant activity of natural compounds supported on mesoporous Silica
(2019)The preparation of new composites and their antioxidant properties are reported in this study. Eugenol, vanillin and cinnamaldehyde were supported on silica material, through a microwave assisted process. N2 adsorption ... -
Byphenyl Hydrazone SiO2 Composite: Synthesis and Evaluation of a New Chemosensor System for the Detection of Cu2+
(2018)In the present work a byphenyl hydrazone/SiO2 composite was synthetized by a simple procedure. First, the mesoporous SiO2 and the byphenyl hydrazone ligand were prepared. To prepare the composite, the mesoporous silica and ... -
Microwave-assisted embedding of bis-vanillin and bis-eugenol into SBA-15: Synthesis of chemosensors precursors for the detection of metal cations.
(2017)In this work we evaluate the necessary experimental conditions to carry out the embedding of bis-vanillin and bis-eugenol, two potential precursors of chemosensors, in the porous structure of the mesoporous silica SBA-15 ... -
Design and synthesis of the new bis-vainilline derivatives containing hydralazine and isoniazide moieties for the detection of trivalent metal cations
(2016-11)In the present work the design and synthesis of new chemosensors for the determination of metal cations represent an area of hight interest in supramolecular chemistry. The detection and cuantification is important in ... -
Encapsulation of compounds biphenyls into SBA-15: synthesis of composites for application
(2018-02)In the present work two novel hybrid mesoporous material BVA-SBA and BEG-SBA were designed and synthesized by a process assisted by microwave. The nanoparticles were studied by UV-vis and fluorescence spectroscopy, elemental ... -
Desarrollo de dos nuevas sondas fluorogénicas derivadas de la bis-vainillina para la detección de catiónes metalicos trivalentes
(2016-10)En el presente trabajo, se estudió el diseño y síntesis de nuevos quimiosensores para el reconocimiento de cationes metálicos trivalentes como Fe3+, Cr3+ y Al3+ que son altamente tóxicos para el medio ambiente. Los sensores ... -
Propuesta pedagógica para la Tabla Periódica de los Elementos Químicos
(X Congreso Internacional Didácticas de las Ciencias - XV Taller Internacional sobre enseñanza de la Física, 2018-04)Durante el siglo XIX se observaron analogías en algunas propiedades de los elementos químicos. Una clasificación basada en propiedades químicas fue propuesta en 1817 por J.W. Döbereiner que agrupó en tríadas elementos ... -
Preparation and Characterization of Lignin Microparticles-in-Alginate Beads for Atrazine Controlled Release
(2019-09-21)The use of lignin as polymeric matrices for controlled release systems in agriculture is a promising alternative for its reval-orization. In this work, diferent atrazine delivery systems were studied. Lignin derived from ... -
Jornadas de Ciencia y Tecnología 2019 de la UTN Facultad Regional San Francisco: 9 y 10 de octubre de 2019
(UTN, 2019-10-04)Las Jornadas de Ciencia y Tecnología 2019, de la Universidad Tecnológica Nacional, busca a través de la presentación de investigaciones en marcha y de conferencias seleccionadas, estrechar lazos entre los distintos grupos ... -
Calibración de sistemas de múltiples cámaras
(IEEE, 2015-10)The use of multi-camera systems in target tracking applications demands to know positions and orientations of each one of the cameras in a global coordinate system. In this work is described the development and implementation ... -
Exponential family Fisher vector for image classification
(2015-07-01)One of the fundamental problems in image classification is to devise models that allow us to relate the images to higher-level semantic concepts in an efficient and reliable way. A widely used approach consists on extracting ... -
Inclusion of children and adolescents with mild disabilities in the scientific area through a novel workshop as a didactic strategy
(2019-01-06)Despite the effort to provide equal scenarios and a higher inclusion for students with mild disabilities, few experimental activities intended to improve their science performance were reported during the last decades. ... -
Identificación de hojas de plantas usando Vectores de Fisher
(SADIO, 2015-08)En este trabajo se propone el uso de descriptores locales codificados con el método de Vectores de Fisher para resolver el problema de clasificación de hojas de plantas usando imágenes. Se demuestra que con este enfoque ... -
Sistema de seguimiento de objetivos usando múltiples cámaras y estimación Bayesiana
(IEEE, 2015-10)In recent years, the increase in amount of camera networks available has led to the rise up of new techniques and applications of signal processing. In this work, an implementation of image sensor network, cameras, for ... -
Fisher vectors for leaf image classification: an experimental evaluation
(Springer, Cham, 2015-10-25)In this work we present an experimental evaluation of the exponential family Fisher vector (eFV) encoding applied to the problem of visual plant identification. We evaluate the performance of this model together with a ...