Abstract
The aim of this study was to develop qualitative models that enable prediction of quality of carrots. A full factorial experiment including preharvest biocatalyst application, dipping treatments and storage temperatures was employed. Eleven different biochemical and microbiological quality parameters of carrot (Daucus carota L.) were investigated. The effects of treatments on the shelf-life were investigated using discriminant analysis (DA). The lower storage temperatures (1°C) maintained the superior quality. Kinetic functions were applied to each parameter using the Levenberg–Marquardt algorithm to characterize the rate of change of quality. DAs significantly (P < 0.001) differentiated between the combined effects of the preharvest biocatalyst treatment and storage temperatures. Four discriminant functions factored the differentiation of the quality attributes based on storage time. The models fit well to the experimental data for storage at 1°C. The second-order reaction equations allowed for prediction of ascorbic acid, sucrose and sugar–hexose ratio. First-order reaction equations that allow estimation of fructose, sucrose equivalent, total coliform and total fungi and O2 were developed. The empirical evidence suggests that freshness was maintained in the carrots until day 14 (P < 0.001). Ascorbic acid, sucrose and sugar–hexose ratio were the most relevant parameters to rapidly detect the postharvest changes following the second-order decay rate.
Acknowledgment
The authors wish to thank the University of KwaZulu-Natal South Africa, for funding the research.
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©2015 by De Gruyter
Articles in the same Issue
- Frontmatter
- Selected Papers from MAS2014 Workshop
- Special Section “Selected papers from the workshop on Modeling and Simulation of Food Processing and Operations of the MAS 2014 conference (Bordeaux, September 10–12, 2014)”
- Three-Dimensional CFD Simulation of a “Steam Water Spray” Retort Process for Food Vegetable Products
- Temperature Analysis of the Water Supply System of a Dairy Company by Means of a Simulation Model
- Multi-Product Inventory-Routing Problem in the Supermarket Distribution Industry
- Decision Support System, Based on the Paradigm of the Petri Nets, for the Design and Operation of a Dairy Plant
- Critical Reviews
- Rice: Parboiling and Milling Properties
- A Review of Drying Processes in the Production of Pumpkin Powder
- Original Research Articles
- Modelling of Changes in Postharvest Quality Parameters of Stored Carrots Subjected to Pre- and Postharvest Treatments
- Evaluation of Viscosity of Non-Newtonian Liquid Foods with a Flow Tube Instrument
- Characterization of Pyrolysis Products Obtained from Desmodesmus sp. Cultivated in Anaerobic Digested Effluents (DADE)
- The Effects of Nano-SiO2 on Mechanical, Barrier, and Moisture Sorption Isotherm Models of Novel Soluble Soybean Polysaccharide Films
- Adsorption and Desorption Studies of Anthocyanins from Black Peanut Skins on Macroporous Resins
- Convective Air Drying Characteristics and Qualities of Non-fried Instant Noodles
- Microwave-Assisted Extraction of Trigona Propolis: The Effects of Processing Parameters
Articles in the same Issue
- Frontmatter
- Selected Papers from MAS2014 Workshop
- Special Section “Selected papers from the workshop on Modeling and Simulation of Food Processing and Operations of the MAS 2014 conference (Bordeaux, September 10–12, 2014)”
- Three-Dimensional CFD Simulation of a “Steam Water Spray” Retort Process for Food Vegetable Products
- Temperature Analysis of the Water Supply System of a Dairy Company by Means of a Simulation Model
- Multi-Product Inventory-Routing Problem in the Supermarket Distribution Industry
- Decision Support System, Based on the Paradigm of the Petri Nets, for the Design and Operation of a Dairy Plant
- Critical Reviews
- Rice: Parboiling and Milling Properties
- A Review of Drying Processes in the Production of Pumpkin Powder
- Original Research Articles
- Modelling of Changes in Postharvest Quality Parameters of Stored Carrots Subjected to Pre- and Postharvest Treatments
- Evaluation of Viscosity of Non-Newtonian Liquid Foods with a Flow Tube Instrument
- Characterization of Pyrolysis Products Obtained from Desmodesmus sp. Cultivated in Anaerobic Digested Effluents (DADE)
- The Effects of Nano-SiO2 on Mechanical, Barrier, and Moisture Sorption Isotherm Models of Novel Soluble Soybean Polysaccharide Films
- Adsorption and Desorption Studies of Anthocyanins from Black Peanut Skins on Macroporous Resins
- Convective Air Drying Characteristics and Qualities of Non-fried Instant Noodles
- Microwave-Assisted Extraction of Trigona Propolis: The Effects of Processing Parameters