Pyrazine Indicators for Objective Self-Tanning Odor Evaluation
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Solution Overview
Problem
Current methods for evaluating the odor generated by self-tanning agents lack objectivity and quantifiability, as they rely on subjective sensory evaluations, and there is limited research on the specific compounds responsible for the unpleasant odors produced by these agents.
Innovation Solution
The use of pyrazine compounds, such as 2-methylpyrazine, 2,6-dimethylpyrazine, and 2,5-dimethylpyrazine, as indicators to objectively and quantitatively evaluate the odor generated by self-tanning agents, allowing for the assessment of tanning odor and the efficacy of odor-decreasing agents through GC-MS analysis and sensory evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensory evaluation is used to assess odor, then the evaluation can be performed without specialized equipment, but the evaluation lacks objectivity and quantifiability
Solution Approach 1:
The patent introduces pyrazine compounds as intermediary substances that mediate between the complex odor phenomenon and measurable quantities. By identifying specific pyrazine compounds (2-methylpyrazine, 2,6-dimethylpyrazine, 2,5-dimethylpyrazine) as causative substances, the evaluation transitions from subjective sensory assessment to objective measurement of these specific compounds using GC-MS technology.
Solution Approach 2:
The patent replaces the mechanical/sensory evaluation system (human nose and subjective judgment) with an analytical chemistry system (GC-MS instrumentation). This substitution enables precise quantification of pyrazine compounds, transforming the evaluation from qualitative sensory assessment to quantitative chemical measurement.
2Loss of information
If research on specific odor-causing compounds is conducted, then the understanding of odor mechanisms improves, but the complexity of analysis and identification increases
Solution Approach 1:
The patent applies local quality by focusing analysis on specific pyrazine compounds (2-methylpyrazine, 2,6-dimethylpyrazine, 2,5-dimethylpyrazine) rather than attempting to analyze all volatile components. This targeted approach deepens understanding of odor mechanisms while managing analytical complexity through selective identification of key causative substances.
Solution Approach 2:
The patent changes the analytical parameter from general odor assessment to specific compound quantification. By measuring the concentrations of identified pyrazine compounds as proxy parameters for overall odor intensity, the study simplifies the complex relationship between multiple volatile components and perceived odor.
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
This approach enables the objective and quantitative evaluation of tanning odor, identifying pyrazines as key contributors to the earthy odor and allowing for the effective assessment of odor-decreasing agents, reducing subjectivity and improving the understanding of odor generation mechanisms.
Implementation Method 1
a browning reaction, and is caused by the generation of a polymer having a structure similar to that of a brown colorant called melanoidin. However, details of the reaction mechanism thereof have hardly been elucidated. For reference, in the field of food chemistry, a browning reaction is also called Maillard reaction. The browning reaction generally means a reaction through which a nitrogen-containing compound, such as an amino acid or a protein, and a reducing sugar are polymerized to generate melanoidin.
Implementation Method 2
H. E. Nursten, Food Chemistry, 1981, 6(3), 263-277, states that through a Maillard reaction between a dicarbonyl compound and an amino acid, a pyrazine compound is generated.
Implementation Method 3
allowing for the assessment of tanning odor and the efficacy of odor-decreasing agents through GC-MS analysis and sensory evaluation
Data Source
AI summary
A method for evaluating an odor generated when using a self-tanning agent, wherein at least one compound selected from pyrazine compounds represented by the following general formula (1) is used as an indicator substance:wherein R1 represents a methyl group, an ethyl group or an acetyl group, and R2, R3 and R4 independently represent a hydrogen atom or a methyl group.