Amorphous Oligosaccharide Stability via pH-Adjusted Acidic Additives
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Solution Overview
Problem
Amorphous carbohydrate compounds, such as neutral oligosaccharides, face challenges with chemical stability and physical properties, particularly in spray-dried or freeze-dried forms, which affect their shelf-life and bioavailability, as they tend to undergo chemical degradation and physical changes like agglutination.
Innovation Solution
Incorporating an acidic non-carbohydrate component into the amorphous mixture, adjusting the pH of the aqueous solution to between 3.5 and 5.8, and then spray-drying or freeze-drying the mixture to enhance the chemical stability and physical properties, achieving stability comparable to the crystalline form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If amorphous neutral oligosaccharides are used to improve solubility and bioavailability, then these properties are enhanced, but chemical stability deteriorates due to degradation and rearrangement
Solution Approach 1:
The patent applies parameter changes by adjusting the pH of the aqueous solution to a specific range (3.5-5.8) before spray-drying or freeze-drying the oligosaccharide mixture. This pH adjustment stabilizes the amorphous form of the oligosaccharides, preventing chemical degradation and rearrangement while maintaining their solubility and bioavailability benefits. The acidic component modifies the chemical environment to favor stability in the amorphous state.
Solution Approach 2:
The patent creates a composite material system by combining neutral oligosaccharides with an acidic non-carbohydrate component in a specific ratio (1:0.1 to 1:10 w/w). This composite formulation stabilizes the amorphous structure of the oligosaccharides, preventing degradation while preserving the beneficial properties of the amorphous form such as enhanced solubility and bioavailability.
2Reliability
If amorphous form is used to enhance solubility and bioavailability, then absorption is improved, but shelf-life deteriorates due to physical changes like agglutination
Solution Approach 1:
The patent utilizes parameter changes by controlling the pH of the aqueous solution within the range of 3.5-5.8 before drying. This pH control prevents physical changes such as agglutination and phase transitions in the amorphous oligosaccharide structure during storage, thereby extending shelf-life while maintaining the solubility and bioavailability advantages of the amorphous form.
Solution Approach 2:
The acidic non-carbohydrate component acts as an intermediary substance that stabilizes the amorphous structure of the oligosaccharides. It prevents direct interaction between oligosaccharide molecules that would lead to agglutination, thereby maintaining physical stability and extending shelf-life without compromising the beneficial properties of the amorphous form.
3Reliability
If crystalline form is used to achieve chemical stability, then shelf-life is extended, but solubility and bioavailability are reduced
Solution Approach 1:
The patent applies parameter changes by adjusting the pH to 3.5-5.8 and controlling the drying process to preserve the amorphous form of the oligosaccharides. This allows the material to maintain chemical stability comparable to the crystalline form while retaining the enhanced solubility and bioavailability characteristic of the amorphous form, effectively resolving the trade-off between stability and solubility.
Solution Approach 2:
The patent creates a stabilized amorphous form that copies the stability properties of the crystalline form through pH-controlled formulation, while maintaining the inherent solubility and bioavailability advantages of the amorphous structure. The acidic component enables the amorphous form to exhibit crystalline-like stability without sacrificing its solubility benefits.
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 addition of an acidic component significantly reduces chemical degradation and rearrangement of oligosaccharides, maintaining the beneficial properties of amorphous forms while matching the stability of crystalline forms, thereby extending shelf-life and maintaining bioavailability.
Implementation Method 1
adding an acidic non-carbohydrate component to said aqueous solution so that the pH is not lower than −log(x/5·10−3.5) and not higher than −log(x/5·10−5.8)
Implementation Method 2
spray-drying or freeze-drying, preferably spray-drying, the pH adjusted solution obtained in step b)
Implementation Method 3
spray-drying or freeze-drying, preferably spray-drying, the pH adjusted solution obtained in step b)
Data Source
AI summary
It is provided i) an amorphous carbohydrate with improved chemical stability and/or physical features, ii) a method for producing an amorphous carbohydrate with improved chemical stability and/or physical features, and iii) a method for improving the chemical stability and/or the physical features of an amorphous carbohydrate.