Dissertation > Excellent graduate degree dissertation topics show

Air-jet Impingement Drying Quality Attributes of Monukka Grape

Author: TanHongMei
Tutor: YangWenXia
School: Shihezi University
Course: Agricultural Products Processing and Storage
Keywords: The impact of the gas jet Seedless purple grapes Drying Quality Dynamics Ultrasonic extraction
CLC: TS255.42
Type: Master's thesis
Year: 2010
Downloads: 32
Quote: 0
Read: Download Dissertation

Abstract


Grapes made dry long drying time, lower-quality products, the gas jet impingement drying technology used for the dried seedless purple grapes, and can effectively shorten the drying time and increase drying efficiency and product quality. A a seedless purple raisins quality under different temperature, wind speed and pretreatment experimental study, physicochemical determination and sensory evaluation of different drying methods seedless purple raisins, dried seedless purple grapes in the degradation of the chemical composition of the gas jet impact Kinetic analysis provide theoretical support for the optimization of the process parameters. Using ultrasonic extraction of anthocyanins and resveratrol seedless purple grapes, fresh seedless purple grapes anthocyanins extracted the best conditions: acidity of 0.3% in 95% ethanol solution at room temperature for solid-liquid ratio of 1 : 9, ultrasonic power is 225W conditions sonicated for 20min; seedless purple raisins anthocyanin extract the best conditions for: acidity of 1.5% of 95% ethanol solution at room temperature by the solid-liquid ratio of 1:12, the ultrasonic power 270W conditions under ultrasound treatment 70min; fresh seedless purple grapes resveratrol extract the best conditions: 75% ethanol concentration, solid to liquid ratio of 1:4, extraction time 40min, ultrasonic power 270W. Seedless purple raisins resveratrol extract the best conditions: 75% ethanol concentration, solid-liquid ratio 1:15, extraction time 60min, ultrasonic power 315W. Analysis showed that the gas jet impingement the the dried seedless purple grapes total acid production than other drying methods seedless purple raisins higher, reducing sugar loss slightly with increasing temperature, anthocyanins most serious loss of quality seedless purple raisins Resveratrol has increased with increasing temperature, and tannin content with increasing temperature vary under; the not obvious the experiments selected range of wind speeds and different cleaning methods of pretreatment seedless purple raisins quality impact. Production of seedless purple anthocyanin content than other drying methods in natural dried seedless purple raisins raisins, natural drying and solar drying seedless purple raisins resveratrol and tannin content than the gas jet drying slightly The lower several drying methods the seedless the Purple raisins vitamin C content was not significantly different. Several drying methods seedless purple raisins sensory evaluation and physical parameters measured hardness of the treated seedless purple raisins promote drying agent gas jet impingement the the dried seedless purple grapes epidermal clean hardness and resistance Tsui, higher resistance value; and resistance Tsui relatively low, and no raisins characteristic aroma; naturally dried seedless purple grapes epidermal impurities obvious. By the impact of the gas jet dry seedless purple grapes in vitamin C, tannins, anthocyanins, resveratrol degradation kinetics of degradation reaction rate constant increases with increasing temperature vitamin C degradation reactions The activation energy for 23.0938KJ/mol. Tannins gradually as the drying time loss, degradation activation energy for 93.865KJ/mol seedless purple grapes tannins dynamics analysis. Anthocyanin degradation in line with the kinetics of a reaction the degradation reaction activation energy of 80.48KJ/mol. By kinetic analysis of resveratrol, resveratrol degradation reaction activation energy is 46.944 KJ / mol.

Related Dissertations

  1. Study on Characteristics of Contiuous Fiber-Reinforced Metal Matrix Composites under Hypervelocity Projectile Impact,TB332
  2. Modeling Analysis and Slip Estimation for Lunar Rovers,TP242
  3. Reaserch on Dynamics for Fast Walking of Biped Robot,TP242.6
  4. Analysis and Control of 6-DOF Electrical Driven Parallel Manipulator,TP242.2
  5. The Drying of Tilapia Fillet Using Supercritical Carbon Dioxide,TS254.4
  6. Influence of Nanostructure on Hydrophobic Properties at TiO2 Surface Studied by Molecular Dynamics Simulation,O614.411
  7. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  8. The Dynamic Performance Analysis of Oil Pumping Center and Structural Optimization of Improvement,TE933.1
  9. Influence of Nitrate Concentrations on the Production of N2, N2O, NO, and CO2 by Soil Cores During Anaerobic Incubation,X131.3
  10. Optimization of Extraction of Gastrodin from Rhizoma Gastrodia by Response Surface Methodology,R284.1
  11. Research on Key Technology of Recycling Horizontal Subsea Pipe Conector,TE973
  12. Study on Combustible Gas Leakageage and Diffusion by CFD Simulation,X937
  13. Water in oil emulsion of water hit the harmonic the demulsification dynamics analysis and its mechanism,X703
  14. Traumatic Brain Injury Patients with White Blood Cells in Peripheral Blood CD34~+ Cells and Content Changes,R651.1
  15. Alpine Meadow nitrogen mineralization and microbial Mechanism,S812
  16. Internal power dynamics of district offices,D630
  17. Non- rigid body system kinematics and dynamics of the collision point,O313.3
  18. Magnetic field spin chain entanglement dynamics of particles in both,O413.1
  19. N-heptane HCCI combustion process temperature thermodynamics and kinetics theory,O643.21
  20. Molecular Dynamics Simulations of Temperature Effects on Pt/Au Heteroepitaxial Growth,O484.1
  21. Molecular Dynamics Simulations of Structural Relaxation of Two-dimensional Lattice Mismatch Epitaxial Aluminum Thin Film,O484.1

CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Fruits, vegetables,nuts processing industry > Fruit and processed foods > Dried fruit
© 2012 www.DissertationTopic.Net  Mobile