After the separation and characterization of the gaseous components derived from headspace scent analysis, {HEAD ~ identified components} will then be categorized into {TAIL ~ two groups}: those that are non energetic components 51 and those that are energetic components 52 
After the separation and characterization of the gaseous components derived from headspace scent analysis , { HEAD ~ identified components } will then be categorized into { TAIL ~ two groups } : those that are non energetic components 51 and those that are energetic components 52
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