Browsing by Author "Fuentes Pérez, Edwar"
Now showing items 1-18 of 18
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Cebrero Acuña, Gonzalo Felipe (Universidad de Chile, 2018)Las abejas llevan a cabo el mayor porcentaje de polinizaciones, tanto de plantas silvestres como domésticas, lo que les otorga una función invaluable para el medio ambiente y los productores que se benefician de ellas. En ...
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Sanhueza Rojas, Oscar Hugo (Universidad de Chile, 2016)Hoy en día existe una creciente preocupación mundial por la disminución sostenida de las abejas melíferas (Apis Mellifera). La desaparición inexplicable de estas en un corto plazo de tiempo se ha denominado “Síndrome de ...
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Leiva Miranda, Karla Alejandra (Universidad de Chile, 2020)La criminalística, es la disciplina que emplea un conjunto de técnicas y procedimientos para el estudio de evidencia física, en el contexto de una investigación criminal, aportando con información científica al sistema ...
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Sepúlveda Cortes, Betsabet Abisag (Universidad de Chile, 2015)El Aceite o "jugo de la oliva" proviene de los frutos del olivo, Olea Europea L., ha estado presente en la historia del hombre desde las antiguas civilizaciones, ocupando un lugar relevante. Se ha utilizado tanto como ...
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Balsebre Cajiao, Arantza (Universidad de Chile, 2018)El uso masivo de pesticidas de amplio espectro en el tiempo ha generado efectos adversos sobre organismos no blanco. Las abejas domésticas (Apis mellifera) han sido uno de los principales organismos afectados causando gran ...
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Vásquez, Valeria; Báez Contreras, María Estrella; Bravo, Manuel; Fuentes Pérez, Edwar (2013)Seven heavy polycyclic aromatic hydrocarbons (PAHs) of concern on the US Environmental Protection Agency priority pollutant list (benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, dibenz[a,h ...
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Caipo Coral, Leeanny Johary; Sandoval Paredes, Ana Maria; Sepúlveda, Betsabet; Fuentes Pérez, Edwar; Valenzuela Baez, Rodrigo Wladimir; Metherel, Adam H.; Romero Palacios, Nalda Marcela (MDPI, 2021)Commercialization of extra virgin olive oil (EVOO) requires a best before date recommended at up to 24 months after bottling, stored under specific conditions. Thus, it is expected that the product retains its chemical ...
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Bazaes Casanova, Aliosha Andro (Universidad de Chile, 2016)El síndrome de colapso de colmena que afecta a las abejas, principales polinizadores de las plantas, ha escalado hasta convertirse en un problema global. El abandono, sin causa aparente, de colmenares completos con abundancia ...
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Alarcón, Francis; Báez Contreras, María Estrella; Bravo, Manuel; Richter Duk, Pablo; Escandar, Graciela M.; Olivieri, Alejandro C.; Fuentes Pérez, Edwar (Elsevier B.V., 2013-06-15)The possibility of simultaneously determining seven concerned heavy polycyclic aromatic hydrocarbons (PAHs) of the US-EPA priority pollutant list, in extra virgin olive and sunflower oils was examined using unfolded ...
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Fuentes Pérez, Edwar; Pinochet, Hugo; Potin-Gautier, Martine; De Gregori, Ida (AOAC INTERNATIONAL, 2004-01)This stability of Sb(Ill) and Sb(V) species was studied during,single extraction from soils by water. EDTA, diluted H2SO4 and H3PO4, and oxalic acid/oxalate solutions, with and without ascorbic acid, were used as stabilizing ...
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Ley Hernández, Constanza Alicia (Universidad de Chile, 2018)La abeja melífera (Apis mellifera) es uno de los insectos polinizadores más importantes, ya que tiene un rol ecológico y económico al polinizar el 16% de las 260.000 especies de angiospermas y el 70% de las especies ...
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Fuentes Pérez, Edwar; Báez Contreras, María Estrella; Reyes, Dana (ELSEVIER, 2006-09-25)A simple microwave-assisted extraction and partitioning method (MAEP) using water-acetonitrile and n-hexane for desorption and simultaneous partitioning, respectively, together with gas chromatography (GC) was studied to ...
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De Gregori, Ida; Fuentes Pérez, Edwar; Rojas, Mariela; Pinochet, Hugo; Potin-Gautier, Martine (ROYAL SOC CHEMISTRY, 2003-04)This paper reports a comparative study of the concentration of three important environmental elements that are often found together in mineral deposits and then associated with mining activities: copper, arsenic and antimony. ...
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Fuentes Pérez, Edwar; Báez Contreras, María Estrella; Labra, Ronnie (ELSEVIER SCIENCE BV, 2007-10-26)This work describes an optimised method for the determination of six representative organophosphorus pesticides (OPPs) (diazinon, parathion, methyl pirimiphos, methyl parathion, ethoprophos, and fenitrothion) in agricultural ...
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Fuentes Pérez, Edwar; Pinochet, Hugo; De Gregori, Ida; Potin-Gautier, Martine (PERGAMON-ELSEVIER SCIENCE LTD, 2003-07-18)A sensitive atomic spectrometric method for the redox speciation analysis of antimony in soils is described. The method is based on the selective generation of stibine from Sb(III) in a continuous flow system using atomic ...
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Jachero, Lourdes; Sepúlveda, Betsabet; Ahumada, Inés; Fuentes Pérez, Edwar; Richter Duk, Pablo (Springer, 2013)A method of sample preparation based on use of rotating disk sorptive extraction (RDSE) has been developed for determination of triclosan (TCS) and methyltriclosan (MTCS) in water samples. The sorptive and desorptive ...
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Fuentes Pérez, Edwar; Báez Contreras, María Estrella; Quiñones Maragliano, Adalí Verónica (ELSEVIER SCIENCE BV, 2008-10-17)A systematic study of the microwave-assisted extraction coupled to solid-phase extraction of nine organophosphorus pesticides (dimethoate, diazinon, pirimiphos methyl, parathion methyl, malathion, fenthion, chlorpyriphos, ...
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Ahumada Torres, Aída Inés de Lourdes; Escudero, Paula; Carrasco Rimassa, María Adriana; Castillo, Gabriela; Ascar Estay, María Loreto; Fuentes Pérez, Edwar (ROYAL SOC CHEMISTRY, 2004)In Chile, the increasing number of plants for the treatment of wastewater has brought about an increase in the generation of sludge. One way of sludge disposal is its application on land; this, however involves some problems, ...