Salt and Acid-Induced Soft Tofu-Type Gels: Rheology, Structure and Fractal Analysis of Viscoelastic Properties as a Function of Coagulant Concentration
Abstract
The coagulant concentration dependence on the rheological properties of acid and salt-induced soft tofu-type gels formed with heated soy protein solutions was investigated. All gels showed a clear gel-like behavior, with acid-induced gels having the highest storage modulus (G′). Increase in coagulant concentration resulted in higher G′ and shorter gelation time (tgel). The dependence of tgel on the coagulant concentration could be scaled with a power law model with R2 varying between 0.9535 and 0.9787. Also the dynamic moduli change over angular frequency fitted well the models:
Acknowledgments
The work was financially supported by The National Natural Science Foundation of China (No. 21276107), The 863 Program (Hi-tech research and development program of China) (No. 2013AA102204-3) and The National Great Project of Scientific and Technical Supporting Programs funded by the Ministry of Science and Technology of China during the 12th 5-year plan (No. 2012BAD34B04-1).
Abbreviations
- C
protein concentration (%)
- d
Euclidean dimension (=3)
- df
fractal dimensionality
- G′
storage modulus
- G″
loss modulus
- G∞
storage modulus at infinite time
- n
scaling exponent in power law relationship of γ0 and C
- m
scaling exponent in power law relationship of G′ and C
- t
time
- x
fractal dimensionality of the backbones (1≤x <df)
- α
microscopic elastic constant in the model of Wu and Morbidelli (0≤α≤1)
- β
exponent in model of Wu and Morbidelli which depends on α and x
- δ
phase angle
- γ0
critical strain; limit of linearity
- σfr
fracture stress
- γfr
shear deformation at fracture
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Articles in the same Issue
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- Selected Papers from MAS2013 Workshop
- Special section “Selected Papers from the Workshop on Modeling and Simulation of Food Processing and Operations of the MAS 2013 Conference (Athens, September 25–27, 2013)”
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Articles in the same Issue
- Frontmatter
- Selected Papers from MAS2013 Workshop
- Special section “Selected Papers from the Workshop on Modeling and Simulation of Food Processing and Operations of the MAS 2013 Conference (Athens, September 25–27, 2013)”
- Safety and Security in Fresh Good Supply Chain
- Performance Analysis of the Water Supply System of a Dairy Company by Means of an Advanced Simulation Tool
- Optimal Design of an Olive Oil Mill by Means of the Simulation of a Petri Net Model
- Original Research Articles
- Moisture Sorption Isotherms, Isosteric Heat of Sorption and Glass Transition Temperature of Murtilla (Ugni molinae T.) Berry
- Salt and Acid-Induced Soft Tofu-Type Gels: Rheology, Structure and Fractal Analysis of Viscoelastic Properties as a Function of Coagulant Concentration
- Heat Transfer during Steaming of Bread
- Kinetics and Thermodynamics of Gum Extraction from Wild Sage Seed
- Formation and Stability of Vitamin E Enriched Nanoemulsions Stabilized by Octenyl Succinic Anhydride Modified Starch
- Investigation on a Soft Tubular Model Reactor Based on Bionics of Small Intestine – Residence Time Distribution
- Comparison of Physicochemical and Gel Characteristics of Hydroxypropylated Oat and Wheat Starches
- Environomical Analysis and Mathematical Modelling for Tomato Flakes Drying in a Modified Greenhouse Dryer under Active Mode
- Extraction Kinetics and Properties of Proanthocyanidins from Pomegranate Peel
- An Investigation of Energy Consumption, Solar Fraction and Hybrid Photovoltaic–Thermal Solar Dryer Parameters in Drying of Chamomile Flower
- The Adsorption of Undesirable Impurities from Sunflower Oil on the Granulated Sorbents Based on Kaolin Clay
- “Bare” or “Gloved” Hands: A Study on the Production of Safe Food
- Physicochemical Characterization of Arrowroot Starch (Maranta arundinacea Linn) and Glycerol/Arrowroot Starch Membranes
- Optimization of Gluten-Free Cake Prepared from Chestnut Flour and Transglutaminase: Response Surface Methodology Approach
- Estimation of Equilibrium Moisture Content of Pistachio Powder through the ANN and GA Approaches
- Modeling of Furfural and 5-Hydroxymethylfurfural Content of Fermented Lotus Root: Artificial Neural Networks and a Genetic Algorithm Approach
- Physicochemical Properties of Chilled Abalone as Influenced by Washing Pretreatment in Citric Acid Combined with High Pressure Processing
- Synergetic Effects of Pulsed Electric Field and Ozone Treatments on the Degradation of High Molecular Weight Chitosan
- Physical, Thermal and Water-Sorption Properties of Passion Fruit Seeds
- Hydrolysis of Hazelnut Shells as a Carbon Source for Bioprocessing Applications and Fermentation
- Variations in Main Flavor Compounds of Freshly Distilled Brandy during the Second Distillation
- Characterization and Semiquantitative Analysis of Volatile Compounds in Six Varieties of Sugarcane Juice
- Influence of Citric Acid Pretreatment on Drying of Peach Slices
- Degradation Kinetics of Bioactive Compounds and Antioxidant Activity of Pomegranate Arils during the Drying Process
- Short Communications
- Effect of Sucrose Addition on Rheological and Thermal Properties of Rice Starch–Gum Mixtures
- Effect of Pulsed Electric Field on Freeze-Drying of Potato Tissue