LCPUFA Food Composition Oxidation Prevention
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Solution Overview
Problem
Long chain polyunsaturated fatty acids (LCPUFAs) such as EPA and DHA in food compositions are prone to rapid oxidation during processing and storage, leading to reduced nutritional quality and palatability, and increased production costs, making it challenging to achieve a desired shelf-life of at least 6 months.
Innovation Solution
A process involving the admixture of a nutritive base with LCPUFAs, cooking at temperatures above 50°C, addition of oxidatively protected LCPUFAs, and packaging in an oxygen-depleted environment within a sealed container to create a food product that retains bioeffectiveness and palatability for at least 6 months.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LCPUFAs are included in food compositions to provide nutritional benefits, then the nutritional quality is improved, but the shelf-life is reduced due to rapid oxidation
Solution Approach 1:
The patent applies inert atmosphere by replacing oxygen with nitrogen gas in the packaging headspace and using nitrogen flushing during processing. This creates an oxygen-depleted environment that prevents oxidation of LCPUFAs, thereby extending shelf-life while maintaining nutritional quality. The inert atmosphere directly addresses the oxidation problem without compromising the beneficial properties of LCPUFAs.
Solution Approach 2:
The patent uses antioxidants as intermediary substances that donate electrons to free radicals, preventing them from attacking LCPUFAs. These antioxidants act as mediators between the LCPUFAs and oxygen, sacrificing themselves to protect the valuable fatty acids. This intermediary approach allows the food to maintain nutritional quality for extended periods.
2Duration of action of stationary object
If oxidation protection measures are implemented to extend shelf-life, then the shelf-life is improved, but the production cost increases
Solution Approach 1:
The patent changes the oxygen concentration parameter in the packaging environment from normal atmospheric levels (21% oxygen) to oxygen-depleted levels (<1% oxygen) through nitrogen flushing. This parameter change extends shelf-life significantly while using relatively simple and cost-effective equipment. The process modifies the environment rather than requiring complex preservation systems.
Solution Approach 2:
The patent implements preliminary oxidation prevention by adding antioxidants and establishing inert atmosphere before the oxidation process can significantly degrade the LCPUFAs. This preventive approach is more cost-effective than attempting to reverse oxidation damage or use expensive active preservation systems that require continuous energy input.
3Reliability
If oxygen scavengers and nitrogen flushing are used to prevent oxidation, then the palatability is maintained, but the processing complexity increases
Solution Approach 1:
The patent uses oxygen scavenger packets as intermediary devices that chemically consume residual oxygen in the packaging headspace. These simple passive devices maintain palatability by preventing oxidation without requiring complex active systems. The oxygen scavengers are inexpensive, easy to incorporate into existing packaging lines, and require no external power or control systems.
4Ease of manufacture
If LCPUFAs are exposed to air during processing and storage, then the processing is simplified, but the nutritional quality deteriorates due to oxidation
Solution Approach 1:
The patent extends the inert atmosphere protection from just storage to include processing operations. By maintaining nitrogen atmosphere during filling and handling operations, the system prevents oxidation without requiring complex specialized equipment for each processing step. The inert atmosphere is established once and maintained throughout the product lifecycle.
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 process ensures a shelf-life of at least 6 months with substantial retention of bioeffective LCPUFAs and palatability, preventing oxidation and maintaining nutritional quality and animal acceptance.
Implementation Method 1
the resulting admixture is cooked at a temperature not less than about 50° C. to produce a food composition
Implementation Method 2
these fatty acids are subject to rapid oxidation when exposed to air, metal, light, and/or heat during processing and storage of such compositions
Data Source
AI summary
A process for preparing a food composition by mixing a nutritive base with at least one long chain polyunsaturated fatty acid; cooking the resulting mixture at a temperature not less than about 50° C.; adding to the food composition at least one oxidatively protected long chain polyunsaturated fatty acid; and packaging the resulting composition in an oxygen depleted environment within a sealed container to provide the food product that exhibits (1) acceptable palatability to an animal and (2) a shelf-life of at least about 6 months when stored at ambient temperature without opening the container.