Application of pulsed light and controlled atmosphere storage for extension of post-harvest quality and shelf-life of highbush blueberries (cv. Draper)
department or school: Land and Food Systems, Faculty of
data provider: DSpace
degree campus: UBCV
creator: Shojaei, Maryam
issued: 2023-01-31T08:00:00Z
issued: 2021
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: There has been a burgeoning interest in blueberry consumption due to its nutritional and health benefits. However, blueberries are very perishable due to their susceptibility to water loss and mould deterioration, affecting their quality and shelf-life. The objective of this study was to optimize innovative post-harvest strategies, pulsed light (PL) and controlled atmosphere storage (CAS) to improve the quality and shelf-life of highbush blueberries grown in BC. We hypothesized that the post-harvest shelf-life of highbush blueberries could be extended through using PL and CAS while both strategies meet the consumer demand for natural, and minimally processed foods. In this study, the effect of four CAS conditions (8kPa CO2 + 1.5kPa O2; 8kPa CO2 + 10kPa O2; 15kPa CO2 + 1.5kPa O2; 15kPa CO2 + 10kPa O2) and three PL treatments with doses of 3, 6, and 9 Jcm-2 were assessed using for their impact on the final quality and shelf-life of highbush blueberries (cv. Draper). In addition, the berry quality parameters (colour, firmness, weight loss, and rot incidence), antioxidant activity, pH, titratable acidity, and total soluble solids, and shelf-life were analyzed during six weeks. All CAS and PL treatments showed decreased weight loss compared to the regular atmosphere storage at the end of the storage. PL doses of 9 Jcm-2 showed less rot incidence, and PL doses of 6 Jcm-2 showed higher firmness compared to control; however, no significant difference (p < 0.05) has been observed in PL treated blueberries in all CAS in terms of firmness and rot incidence compared to control by week six. Increasing PL doses decreased antioxidant activity during storage time. Total soluble solids (TSS) and total acidity (TA) increased with increasing PL doses in the lower O2 concentration storage. Results showed that treating blueberries with PL doses of 6 and 9 Jcm-2 in CAS of 10kPa O2 and 8kPa CO2 provided the optimal conditions for maintaining the blueberries’ quality traits after four week…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/80494
note: i Application of Pulsed Light and Controlled Atmosphere Storage for Extension of Post-Harvest Quality and Shelf-life of Highbush Blueberries (cv. Draper) by Maryam Shojaei A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in The Faculty of Graduate and Postdoctoral Studies (Food Science) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) December 2021 ©Maryam Shojaei, 2021 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis entitled: Application of Pulsed Light and Controlled Atmosphere Storage for Extension of Post-Harvest Quality and Shelf-life of Highbush Blueberries (cv. Draper) Submitted by Maryam Shojaei in partial fulfillment of the requirement for the degree of Master of Science in Food Science Supervisory Committee Members: Dr. Anubhav Pratap-Singh, Assistant Professor, Food Science, UBC Supervisor Dr. David D. Kitts, Professor, Food Science, UBC Supervisory Committee Member Dr. Simone Diego Castellarin, Associate Professor, Plant Science, UBC Supervisory Committee Member iii Abstract There has been a burgeoning interest in blueberry consumption due to its nutritional and health benefits. However, blueberries are very perishable due to their susceptibility to water loss and mould deterioration, affecting their quality and shelf-life. The objective of this study was to optimize innovative post-harvest strategies, pulsed light (PL) and controlled atmosphere storage (CAS) to improve the quality and shelf-life of highbush blueberries grown in BC. We hypothesized that the post-harvest shelf-life of highbush blueberries could be extended through using PL and CAS while both strategies meet the consumer demand for natural, and minimally processed foods. In this study, the effect of four CAS conditions (8kPa CO2 + 1.5kPa O2; 8kPa CO2 + 10kPa O2; 15kPa CO2 + 1.5kPa O2; 15kPa CO2 + 10kPa O2) and three PL treatments with doses of …
has type: Thesis/Dissertation
date issued: 2022-05
is shown at: 10.14288/1.0406110
language: eng
degree discipline: Food Science
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Pratap-Singh, Anubhav
type: Text
identifier URI: http://hdl.handle.net/2429/80494