Effect of ultrasound intensification on the supercritical fluid extraction of phytochemicals from Agave salmiana bagasse

[EN] The aim of this work was to evaluate the effect of ultrasound on supercritical fluid extraction for the recovery of antioxidants and saponins from agave bagasse as a green extraction technique. When a mass load of 0.086 g/cm(3) was used, ultrasound effect was not observed, due to sample swelling and compaction within the cell. For 0.043 g/cm(3), the intensification effect of ultrasound was significant (p < 0.05) and its magnitude depended on the transducer geometry. For a multiplate transducer geometry, antioxidant capacity increased from 12.18 +/- 1.01 to 20.91 +/- 1.66 mu mol TE/g; and saponins from 19.05 +/- 1.67 to 61.59 +/- 1.99 mu g/g, when ultrasound was applied. Although the amount of bioactives extracted is low, the use of a multiplate transducer design was able to intensify the supercritical fluid extraction of phytochemicals from agave bagasse. Consequently, this type of transducer can become an alternative for the application of ultrasound on the supercritical fluid extraction of other suitable agro-industrial by-productsThe authors are grateful for the financial support from CONACYT CVU 270166, Mexico; NutriOmics Chair from Tecnologico de Monterrey, Mexico; and Nutrigenomics Research Chair from Fundacion FEMSA, Mexico. We thank the technical support from the ASPA group technicians and Albino Vargas from AGMEL S.A de C.V for donating agave bagasse for this projectSantos-Zea, L.; Gutierrez-Uribe, JA.; Benedito Fort, JJ. (2019). Effect of ultrasound intensification on the supercritical fluid extraction of phytochemicals from Agave salmiana bagasse. The Journal of Supercritical Fluids. 144:98-107. https://doi.org/10.1016/j.supflu.2018.10.013S98107144Pereira, C. G., & Meireles, M. A. A. (2009). Supercritical Fluid Extraction of Bioactive Compounds: Fundamentals, Applications and Economic Perspectives. 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SMS-Builder: An adaptive software tool for building systematic mapping studies

A Systematic Mapping Study is an instrument frequently used to carry out a search process, identification, and classification of studies in different fields. Researchers in front of this type of process have a challenge while managing the data about these studies. This paper presents a software tool that has been created to help those who need to build a systematic mapping study. In addition, this work follows the evidence-based software engineering approach and extends it through a software tool by including different ways of adapting this process

Tamaño de planta y formación específica en el mercado laboral colombiano

Con base en la Encuesta de Calidad de Vida (ECV) de 2003 del DANE, en este trabajo se estudia la formación para el empleo (FPE) en el mercado laboral colombiano. Se encuentra una relación estrecha entre modernidad empresarial y FPE. Utilizando funciones mincerianas modificadas se encuentra que la rentabilidad de la FPE aumenta con el nivel de educación formal y el tamaño de las empresas

Variación latitudinal del ciclo reproductivo de dos bivalvos con orígenes biogeográficos contrastantes a lo largo del ecosistema de afloramiento de la Corriente de Humboldt

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Control of Thickness of PEDOT Electrodeposits on Glass/ITO Electrodes from Organic Solutions and its Use as Anode in Organic Solar Cells

AbstractPoly-ethylendioxythiophene (PEDOT) was electropolymerized from the monomer EDOT in acetonitrile (ACN) containing Bu4N+ClO4-, BF4- or PF6- ions as supporting electrolyte. The electrode used was transparent electrodes (Glass/ITO) in order to generate the anode of an organic solar cell (OSC). Potentiodynamic and potentiostatic electropolymerization techniques were used to make the conducting polymer deposits (E-PEDOT), which were obtained as a thin film onto the ITO surface. It was possible to control the thickness of the electrodeposited films in the range of 15 to 200nm measured by AFM. With the thinner films (until 100nm), it was observed that its absorbance at 700nm was linearly dependent with their thickness and it was possible to obtain an equation that was used to measure the films thickness of future experiments. The E-PEDOT films were successfully used for constructing OSC's and the efficiency values found were equivalent or slightly superior to those found with the classical PEDOT:PSS anode

Synthesis of Silver nanoparticles (AgNPs) with Antibacterial Activity

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Evaluación de técnicas de tinción para la observación de bandas de crecimiento en vértebras de elasmobranquios tropicales

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A Systematic Mapping Study is an instrument frequently used to carry out a search process, identification, and classification of studies in different fields. Researchers in front of this type of process have a challenge while managing the data about these studies. This paper presents a software tool that has been created to help those who need to build a systematic mapping study. In addition, this work follows the evidence-based software engineering approach and extends it through a software tool by including different ways of adapting this process

Notch/Wnt Cross-Signalling Regulates Stemness Of Dental Pulp Stem Cells Through Expression Of Neural Crest And Core Pluripotency Factors

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