Related Experiment Video
Updated: Jan 29, 2026
06:51
Film Extrusion of Crambe abyssinica/Wheat Gluten Blends
Published on: January 17, 2017
10.5K
Concentration dependent rate constants of sodium substitute functionalities during wheat dough development
Mario Jekle1, Andreea Necula1, Margit Jekle1
1Technical University of Munich, Institute of Brewing and Beverage Technology, Research Group Cereal Technology and Process Engineering, Weihenstephaner Steig 20, 85354 Freising, Germany.
Food Research International (Ottawa, Ont.)
|February 6, 2019
Summary
Chloride salts, except KCl, alter wheat dough properties like water absorption and stability. Their effects on dough development and fermentation intensity follow the Hofmeister series due to changes in gluten hydration.
Area of Science:
- Food Science
- Material Science
- Physical Chemistry
Background:
- Sodium chloride (NaCl) is a key ingredient in wheat dough, influencing texture and flavor.
- Alternative chloride salts are explored as NaCl substitutes for sensory or technological benefits.
- Understanding salt interactions with dough components is crucial for optimizing baking processes.
Purpose of the Study:
- To investigate the impact of various chloride salt substitutes on wheat dough development and fermentation.
- To determine if the effects of these salts correlate with the Hofmeister series.
- To analyze concentration-dependent functionalities of chloride salts in wheat dough.
Main Methods:
- Wheat dough mixing tests measuring water absorption, development time, and stability.
- Fermentation tests assessing maximum dough height.
- Confocal laser scanning microscopy (CLSM) with image analysis.
- Calculation of concentration-dependent rate constants.
Main Results:
- Chloride salts, except KCl, significantly affected dough mixing and fermentation properties at 2g/100g flour.
- The observed effects strongly correlated with the Hofmeister series, indicating altered gluten protein hydration.
- Concentration-dependent rate constants for chloride salts also followed the Hofmeister series trend.
Conclusions:
- Chloride salt type significantly influences wheat dough rheology and fermentation.
- The Hofmeister series effectively predicts the impact of chloride salts on dough properties.
- Gluten protein hydration is a key mechanism underlying these salt-specific effects.
Related Concept Videos
02:39The Integrated Rate Law: The Dependence of Concentration on Time
41.4K
While the differential rate law relates the rate and concentrations of reactants, a second form of rate law called the integrated rate law relates concentrations of reactants and time. Integrated rate laws can be used to determine the amount of reactant or product present after a period of time or to estimate the time required for a reaction to proceed to a certain extent. For example, an integrated rate law helps determine the length of time a radioactive material must be stored for its...
41.4K
03:03Concentration and Rate Law
38.2K
The rate of a reaction is affected by the concentrations of reactants. Rate laws (differential rate laws) or rate equations are mathematical expressions describing the relationship between the rate of a chemical reaction and the concentration of its reactants.
For example, in a generic reaction aA + bB ⟶ products, where a and b are stoichiometric coefficients, the rate law can be written as:
For example, in a generic reaction aA + bB ⟶ products, where a and b are stoichiometric coefficients, the rate law can be written as:
38.2K
02:55Temperature Dependence on Reaction Rate
88.9K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
88.9K
02:46Calculating the Equilibrium Constant
37.9K
The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression.
For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation:
For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation:
37.9K
01:20Determination of Michaelis Constant and Maximum Elimination Rate
467
The Michaelis constant (KM) and the theoretical maximum process rate (Vmax) are vital parameters in the Michaelis-Menten equation, central to many biochemical reactions. They provide essential insights into enzyme kinetics and drug metabolism.
These parameters can be estimated by analyzing plasma concentration data post-drug administration. A notable example of this application is phenytoin, a drug with capacity-limited kinetics. It's recommended that phenytoin should be administered at two...
These parameters can be estimated by analyzing plasma concentration data post-drug administration. A notable example of this application is phenytoin, a drug with capacity-limited kinetics. It's recommended that phenytoin should be administered at two...
467
03:08Rate-Determining Steps
37.1K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
37.1K