Abstract
A simple method called low-temperature vacuum drying (LTVD) was used to produce a novel dehydrated potato flour called raw dehydrated potato flour (RDPF). Preparing RDPF by LTVD at 60°C, 70°C and 80°C in both slice and dice shape was investigated. Potato samples in dice shape are easier dehydrating than in slice shape, the starch granules of RDPF maintain ellipsoid shape as the native potato starch. The best temperature of LTVD to prepare the RDPF is around 70°C according to CIE chromaticity results. Dehydrate at 60°C in dice shape, 88.37% of the trypsin inhibitor activity of the fresh potato is maintained. The Mixolab curve shows that the RDPF has some similar rheological properties of the wheat flour. Protein undenatured, starch ungelatinized, with the high performance of processing properties, RDPF has a number of potential applications in the potato staple food manufacture.
Abbreviations
- LTVD,
low-temperature vacuum drying
- RDPF,
raw dehydrated potato flour
- CIE,
International Commission on Illumination
- FD,
Freeze drying
- SEM,
scanning electron microscope
- TIA,
trypsin inhibitor activity
Acknowledgments
This work was financially supported by the China Agriculture Research System (grant number: CARS-10), the National Key R&D program of China (grant number: 2016YFD0401302-02), the Science and Technology Major Project of Gansu Province (grant number: 1602NKDJ022-1), Natural Science Foundation of Gansu Province of China (grant number:1501RJZA004) and the Science and Technology Planning Project of Lanzhou (grant number: 2016-3-123).
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Articles in the same Issue
- Functional and Film-forming Properties of Mechanically Deboned Chicken Meat Proteins
- Development and Evaluation of a Small-scale In-field Integrated Postharvest Citrus Treatment Unit – Part 1
- Unripe Banana Flour Produced by Air-Drying Assisted with Ultrasound – Description of the Mechanisms Involved to Enhance the Mass Transfer in Two Approaches
- Analysis of Operating Conditions on Osmotic Dehydration of Plums (Prunus Domestica L.) and 3D-Numerical Determination of Effective Diffusion Coefficients
- Applying CFD for Studying the Dynamic and Thermal Behavior of Solar Chimney Drying System with Reversed Absorber
- Optimization and In-vitro Evaluation of Coating Process for Film-Coated Tablets
- Drying Kinetics of Continuous and Intermittent Heat Pump Drying of Green Soybean Seeds
- Predicting Storage Conditions for Rice Seed with Thermodynamic Analysis
- Preparation of Melatonin-Loaded Zein Nanoparticles using Supercritical CO2 Antisolvent and in vitro Release Evaluation
- A Simple Method to Prepare Raw Dehydrated Potato Flour by Low-Temperature Vacuum Drying