2 research outputs found
De remeros a pasajeros: Memorias de viajes y cambios sociales en una isla de Chiloé, Chile
No full textEl artículo aborda los viajes marítimos que hombres y mujeres de isla Quehui (Archipiélago de Chiloé, Región de los Lagos, Chile) realizaban para llegar a Castro (capital provincial), en la primera mitad del siglo XX. El autor se apoya en relatos ofrecidos por pobladores locales y rinde cuenta del entorno social de la comunidad en torno a tales rutinas. El texto describe la aparición de la lancha a motor, que reemplaza las prácticas anteriores de navegación, y su impacto social en los isleños. La construcción del texto se apoya en un trabajo de campo realizado en la zona de estudio, la utilización de la técnica de entrevistas y una revisión bibliográfica.Palabras claves: Historia local, memoria oral, cambios sociales, oralitura, ChiloéFrom rowers to passengers: Travel memories and social changes in a Chiloé island, Chile Abstract The article is about the sea voyages that men and women from the Quehui island (Chiloé archipelago, Los Lagos region, Chile) had to do during the first half of the 20th century for reaching Castro (provincial capital). The author is based on stories from the local settlers, and the text describes the community social environment around such routines. The article describes the motorboat arrival which replaces the previous navigation practices, and its social impact on islanders. The article is based on a fieldwork carried out in the study area, the use of interviews as a technique and a bibliographic study.Keywords: Local History, Oral Memory, Social Changes, Oraliture, Chiloé
Comparative Effects of Postharvest Ultraviolet-Light Treatments on Antioxidants Properties, Nutritional and Vitamin D Contents of Some Indigenous Green Leafy Vegetables
No full textUltraviolet lamps irradiation has been extensively used in water treatment, surface disinfection, and as a germicidal agent. Yet, activation of some essential reactions in fruits and vegetables occurs at low doses of irradiation, which in turn leads to an improvement of their shelf-life or bioactive compounds. In this study, postharvest effects of ultraviolet irradiation at different wavelengths were investigated on antioxidants properties, nutritional and vitamin D contents of six leafy vegetables. The six vegetables were each subjected to UV-A, B, and C lamps irradiation at wavelengths of 400, 315, and 230 nm respectively in irradiation chambers. The results revealed that ultraviolet irradiation increased the phenolic and flavonoid contents with a better-reducing power ability and antioxidant capacity in tested vegetables. More also, the essential amino acid contents were significantly (P ≤ 0.05) increased. In UV-A treatment, increased nutritional and antioxidant properties were significant (P ≤ 0.05) in M. oleifera leaf extract. On the other hand, a significant (P ≤ 0.05) increase in the level of vitamin D2 and D3 synthesis in the leaves of all the vegetables was observed under UV-B treatment. The results revealed that M. oleifera leaf responds more positively to ultraviolet irradiation than other treated vegetables. Therefore, this study shows that postharvest treatments with UV-A and B lamps may be a useful biological strategy for enhancing the antioxidant and nutritional quality of vegetables. Keywords: Antioxidant activity, UV-radiation, Vegetables, Bioactive compounds, Vitamin D. DOI: 10.7176/ALST/88-04 Publication date:July 31st 202
