SciELO - Scientific Electronic Library Online

 
vol.26 issue1Effect of water stress and temperature increase on productive, physiological and biochemical variables of "cacao" Theobroma cacao L.Ecological and economic valuation of the Francisco Vivar Castro University Park, Loja, Ecuador author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

Share


Arnaldoa

Print version ISSN 1815-8242On-line version ISSN 2413-3299

Abstract

PEREZ RODRIGUEZ, Carla Vanessa  and  PEREZ AZAHUANCHE, Fredy Romel. Effect of exposure time to ultrasound and temperature on the physicochemical properties, content of vitamin C and recount of mold and yeast of the "blackberry" mesocarp Rubus floribundus Kunth (Rosaceae). Arnaldoa [online]. 2019, vol.26, n.1, pp.297-304. ISSN 1815-8242.  http://dx.doi.org/10.22497/arnaldoa.261.26113.

The effect of two exposure times (30 and 45 min) to ultrasound and two temperatures (25 and 40 °C) on the titratable acidity, pH, content of soluble solids, content of vitamin C, and recount of mold and yeast in "blackberry" mesocarp (pulp) Rubus floribundus Kunth (Rosaceae) was evaluated. A 40 kHz frequency ultrasound was applied with a bath ultrasound, in blackberry mesocarp samples contained in glass jars. The results showed that the time of exposure to ultrasound and temperature had a significant effect (p < 0.05) on titratable acidity, content of soluble solids, content of vitamin C, and recount of mold and yeast; regarding to pH, there was only a significant effect of the exposure time. The Duncan test indicated that the exposure time of 30 min to ultrasound and the temperature of 40 °C maintained the lowest variation of the titratable acidity, pH, content of soluble solids, and the lowest recount of mold and yeast, in blackberry mesocarp. The exposure time of 30 min and 25 °C produced the smallest variation in the content of vitamin C. The best treatment corresponds to an exposure time of 30 min to ultrasound and a temperature of 40 ºC

Keywords : ultrasound; blackberry mesocarp; vitamin C; molds; yeasts.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )