Thermal-Reversible Gelling Starch via Genetic Allele Modification
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Solution Overview
Problem
Current corn starches from specific genotypes are limited in forming strong thermal-reversible gels, which are essential for controlling sensory properties in the food industry, as they either form irreversible gels or fail to gel effectively.
Innovation Solution
Modified corn starch with recessive wx and ae alleles, specifically with one or two doses of ae and three doses of wx, is used to create a thermal-reversible gelling agent that can form significantly stronger gels through enzymatic debranching, acid hydrolysis, or shearing, allowing for gel formation without initial gelatinization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional corn starches from specific genotypes are used, then gel formation is achieved, but the gel strength is insufficient and thermal reversibility is limited
Solution Approach 1:
The patent applies parameter changes by modifying the starch molecular structure through specific genetic alleles (ae and wx combinations) that alter amylopectin chain length and branching. This changes the physical-chemical parameters of the starch to enable both strong gel formation and thermal reversibility simultaneously
Solution Approach 2:
The patent creates a composite starch structure by combining specific alleles (ae1/ae2 with wxwx) to produce a starch with unique properties that neither allele alone could provide. The modified starch acts as a composite material with optimized gelation characteristics
2Strength
If enzymatic debranching or acid hydrolysis is applied to waxy maize, then gel formation is enhanced, but the process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-modifying the starch through genetic selection of specific alleles (ae and wx combinations) before any enzymatic or chemical processing. This preliminary genetic modification enables the starch to form strong gels with fewer subsequent processing steps
Solution Approach 2:
The patent changes the molecular parameters of the starch through genetic modification, altering the amylopectin structure in advance. This parameter change reduces the need for complex subsequent processing while maintaining gel strength
3Strength
If initial gelatinization is performed before modification, then gel formation is improved, but the manufacturing steps increase
Solution Approach 1:
The patent applies preliminary action in reverse by pre-modifying the starch genetically so that gelatinization is no longer required before modification. The specific allele combinations enable direct gel formation upon cooling, eliminating the need for preliminary heating and gelatinization steps
Solution Approach 2:
The patent changes the thermal parameters of the starch through genetic modification, altering the gelation temperature and requirements. This allows the starch to form gels without prior gelatinization, simplifying the manufacturing process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The modified starch forms thermal-reversible gels that are stable through multiple melt/gel cycles, exhibiting increased firmness and strength over time, suitable for various food applications such as imitation cheeses and desserts.
Implementation Method 1
The starch may be digested enzymatically or by acid hydrolysis. In another embodiment the starch may be debranched enzymatically.
Implementation Method 2
The starch may be digested enzymatically or by acid hydrolysis.
Implementation Method 3
Thermal-reversible gels are substances that transition into and out of the gel phase depending on conditions, like heat.
Data Source
AI summary
A thermal-reversible gelling agent derived from the modified starch of a waxy corn variant having an endosperm genotype with one or two doses of the recessive amylose-extender gene (ae). The starch may be modified enzymatically, physically, or by acid hydrolysis. Such gelling agents exhibit properties that may be useful in thickening or providing otherwise unique textures to foods.