Showing 21 - 40 results of 119 for search '"chemistry"', query time: 0.04s Refine Results
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    Feed and neurodegenerative diseases: a socio-scientific issue for developing argumentative skills by Cortés, María José, Rodríguez, Rodrigo

    Published 2021
    “…The article shows the results of a research project whose objective was to promote the development of argumentative skills in a group of trainee teachers of the Chemistry degree program at the National Pedagogical University, through the design and application of a didactic unit on the implications of food chemistry in the development and prevention of the Parkinson’s disease [PD] as a socio-scientific issue. …”
    Online
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    Amidación directa de ácidos carboxílicos no-activados con aminas catalizada por NbCl5 by Castillo Millán, Juan, Salinas Torres, Angélica, Martínez Zambrano, José Jobanny, Rojas Sarmiento, Hugo Alfonso, Becerra Córdoba, Diana

    Published 2021
    “…Por ejemplo, el ACS Green Chemistry Institute Pharmaceutical Roundtable ha estimulado la investigación de nuevos y versátiles métodos para la síntesis de amidas con una alta economía atómica.[1,2]…”
    Documento de Conferencia
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    SÍNTESIS DE 7-HIDROXI-4-METILCUMARINA EMPLEANDO ÁCIDO DE WELLS-DAWSON, MÁSICO Y SOPORTADO SOBRE SÍLICE, COMO CATALIZADOR by Horacio Thomas, Graciela Baronetti, Daniel Bennardi, Gustavo Romanelli, Juan Autino

    Published 2012
    “…The reported technique is a clean alternative for the chemical industry.Keywords: Heteropolyacids, Wells-Dawson, Coumarins,Heterogeneous Catalysis, Green Chemistry. …”
    Online
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    Preparation of polymeric derivative from cassava starch (manihot esculenta crantz) and its application as flocculant in waste water treatment by Osear Julio Medina Vargas, Munoz Prieto Efrén de J., Lucia Marlén Moreno Bastidas

    Published 2012
    “…Abstract Synthesis, identification  and  evaluation  of a  cationic flocculant,  from cassava starch in the  species (Manihot esculenta crantz), was conducted, at  Pedagogical  and  Technological  University  of  Colombia,  UPTC, Chemistry Laboratory. The extraction process of native cassava starch, a proximate  analysis,  synthesized  polymer,  was  identified  by  comparing their  structural characteristks with the starch, using apparent viscosity, X-ray diffraction X-RO,  infrared spectroscopy FTIR, and scanning electron microscopy SEM. …”
    Online
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    Síntesis y caracterización del sistema La0,8Sr0,2MnO3. (Synthesis and Characterization of the La0.8Sr0.2MnO3 System.) by Cruz Pacheco, A. F., Gómez Cuaspud, J. A.

    Published 2015
    “…AbstractThis paper reports the synthesis and characterization of an oxide type La0.8Sr0.2MnO3, using a wet chemistry route, which allows to obtain a ceramic material with physicochemical properties and structural characteristics of relevant importance for application as an electrode component for use in solid oxide fuel cells devices (SOFC). …”
    Online
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    Use of Near Infrared Spectroscopy for the Determination of Organic Matter and Total Nitrogen of Soils by Ortega Monsalve, Manuela, Cerón-Muñoz, Mario Fernando, Medina-Sierra, Marisol

    Published 2023
    “…The objective was to generate prediction equations for Organic Matter (MO) and total Nitrogen (total N), by using NIRS spectra. 459 soil samples were processed by wet chemistry and by NIRS and various data transformations analyzed by partial least squares were used. …”
    Online
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    Chemical particulate matter PM10 in the atmosphere of Riohacha - La Guajira Colombia by Doria-Argumedo, Calos Julio, Fagundo-Castillo, Juan Reynerio

    Published 2017
    “…Knowing the chemical composition of particulate matter, PM10 is relevant not only from the point of view of atmospheric chemistry, but also on the quality of the air we breathe in cities.…”
    Online