Comprehensive study on extractable aleuritic acid variability in lac resins: Species, host plant, and seasonal effects with storage impact for optimum and sustainable utilization of lac resins
Extractable aleuritic acid variability in lac resins
Keywords:
K. Chinensis, K. Lacca, Non wood forest produce, Lac, Aleuritic acid, DSCAbstract
Lac is non wood forest produce secreted by different species and strains of Lac insects grown on different host plants during different seasons. However, the diversity in extractable aleuritic acid content in various lac were not yet studied. Therefore, the study developed an improved method for extracting aleuritic acid and studied their variations and the influence of storage on its content in different lac to identify the most appropriate lac and optimum storage period for their efficient utilization. The developed method produces 25-30% more aleuritic acid and saves 10-15% of lac and 5-7L of water per kilogram of scrapedlac. The study found a 13-28% variation in extractable aleuritic acid in the different scrapedlacs. However, the scrapedlac of Kerria Chinensis contains the most extractable aleuritic acid (28%), while Kerria Sharda contains the least (13%). Further, Even though the aleuritic acid was extracted by hydrolysis of scrapedlac, however the study found that the extractable aleuritic acid content in scrapedlac's decreases during storage due to the extensive alkali stable polymerization of their constituent molecules. Therefore, the study concluded that the production ofaleuritic acid from any or old scrapedlac is not economical. However, the fresh scrapedlac produced by K. chinensis species grown on F. macrophylla is the most suitable raw material for the profitable production of aleuritic acid. Furthermore, the study investigated the thermal behaviour of the scrapedlac using DSC and found that the technique might be used as a tool for the quality assessment of scrapedlac.
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