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http://dspace.udla.edu.ec/handle/33000/8381Registro completo de metadatos
| Campo DC | Valor | Lengua/Idioma |
|---|---|---|
| dc.contributor.advisor | Guerrero Marín, Gustavo Adolfo | - |
| dc.creator | Barriga Coronel, Gabriela | - |
| dc.date.accessioned | 2018-02-21T22:12:18Z | - |
| dc.date.available | 2018-02-21T22:12:18Z | - |
| dc.date.issued | 2017 | - |
| dc.identifier.citation | Barriga Coronel, G. (2017). Determinación del contenido de cafeína en infusiones de hoja de guayusa (ilex guayusa) bajo dos condiciones de secado (Tesis de pregrado). Universidad de las Américas, Quito. | es_ES |
| dc.identifier.other | UDLA-EC-TIAG-2017-36 | - |
| dc.identifier.uri | http://dspace.udla.edu.ec/handle/33000/8381 | - |
| dc.description | Nowadays the guayusa (Ilex guayusa) constitutes a plant with increased national production due to its high amount of caffeine, its stimulating effects in the autonomic nervous system inducing resistance to fatigue and acts as vasodilator; as well as its theobromine content helps to reduce physical and mental fatigue. At the same time, has crossed international borders, making itself known in countries such as the United States, which is Ecuador's main trade partner. In the US products are being developed based on guayusa: tea, loose leaf, energy drinks in different presentations (glass bottle or can). This research study was carried out to determinate the amount of extractable caffeine in infusions of guayusa leaves treated under two drying processes. The biological material was recollected in Archidona-Napo province. The phytochemical analysis was conducted at “Instituto Nacional Autónomo de Investigaciones Agropecuarias” (INIAP). For the determination of caffeine and additionally theobromine, young and mature leaves were used. These were treated under two different drying conditions: “green” type 1 (30 °C, 48 h) and “black” type 2 (65 °C, 24 h). The content of the samples as assessed by means of high performance liquid chromatography (HPLC), obtaining as a result 2,25 % ± 1,78 a of caffeine in young leaves type 1, 2,05 % ± 1,44 a in young leaves type 2, 2,02 % ± 2,18 a in mature leaves type 1 and 2,13 % ± 0,43 a in mature leaves type 2. In contrast, the theobromine content was not detectable. The drying method type 1 gave better extraction efficiency for each 100 grams of sample. The extraction of young leaves gave as a result 7,58 % of caffeine content and in mature leaves 6,60 %, compared with the samples treated with the drying method type 2, which obtained as a result 6,69 % in young leaves and 6,50 % in mature leaves. | en |
| dc.description.abstract | Hoy en día la guayusa: Ilex guayusa, presenta un incremento en la producción nacional, debido a su alto contenido de cafeína, su efecto estimulante en el sistema nervioso autónomo genera resistencia al cansancio y actúa como vasodilatador; así también su contenido de teobromina ayuda a reducir el estado de fatiga física y mental... | es_ES |
| dc.format.extent | 78 p. | es_ES |
| dc.language.iso | spa | es_ES |
| dc.publisher | Quito: Universidad de las Américas, 2017 | es_ES |
| dc.rights | openAccess | es_ES |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Ecuador | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ec/ | * |
| dc.subject | ANÁLISIS DE ALIMENTOS | es_ES |
| dc.subject | CAFEÍNA | es_ES |
| dc.subject | GUAYUSA | es_ES |
| dc.title | Determinación del contenido de cafeína en infusiones de hoja de guayusa (ilex guayusa) bajo dos condiciones de secado | es_ES |
| dc.type | bachelorThesis | es_ES |
| Aparece en las colecciones: | Ingeniería Agroindustrial y de Alimentos | |
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| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| UDLA-EC-TIAG-2017-36.pdf | 1,28 MB | Adobe PDF | Visualizar/Abrir |
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