El Instituto Politécnico Nacional
Contribuye al desarrollo económico y social de la nación, a través de la formación integral de personas competentes; de la investigación, el desarrollo tecnológico y la innovación. Además tiene reconocimiento internacional por su calidad e impacto social.
Por favor, use este identificador para citar o enlazar este ítem:
http://repositoriodigital.ipn.mx/handle/123456789/11092| Título : | Gelatine–starch films: Physicochemical properties and their application inextending the post-harvest shelf life of avocado (Persea americana) |
| Palabras clave : | gelatine starch film coating postharvest shelf life avocado |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Wiley-Inter Science |
| Descripción : | BACKGROUND: Several storage techniques have been developed to extend the post-harvest shelf life of
horticultural products. One method involves the use of edible or biodegradable coatings. Such coatings are
made of biological materials that are used to coat fresh products, providing a semi-permeable barrier to water
vapour and gases, e.g. O2 and CO2. The influence of starch concentration, glycerol content and pH on the carbon
dioxide permeability (CO2P) and mechanical properties of gelatine–starch edible films were evaluated.
RESULTS: Results showed that increments in the starch concentration and pH resulted in higher CO2P values.
Film puncture strength increased when the starch concentration decreased and the maximum resistance value
(32.6 N) was obtained at pH 6. Deformation was mainly affected by glycerol and starch content. Some films were
chosen in order to evaluate their effect, as coatings, in the post-harvest shelf life of avocados (Persea americana
Mill c.v. Hass). Fruits were immersed in the coating solutions, air dried and stored at two temperatures. Changes
in colour, weight loss and pulp firmness were determined in fruits stored at 6 ◦C. In addition, respiration rate was
measured in avocados kept at 20 ◦C.
CONCLUSION: The application of gelatine–starch coatings delayed the ripening process of avocados, as indicated
by a better pulp firmness and retention of skin colour, and lower weight loss of coated fruits in comparison with
control avocados. The coatings also resulted in a delayed respiratory climacteric pattern, by 3 days, for coated
fruits. Instituto Politécnico Nacional, CONACYT |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11092 |
| Otros identificadores : | http://hdl.handle.net/123456789/603 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| abstact JSFA.pdf | 74.39 kB | Adobe PDF | Visualizar/Abrir |
Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.