Evaluation of nano-chitosan coatings containing free and encapsulation form of aqueous extract of Angelica seed (Heracleum persicum L.) on quality characteristics of shrimp during storage

 Nowadays, adding biological compounds to free and fine-grained form in food packaging is one of the appropriate technologies . This study was performed to prepare a new degradable coating with free form and encapsulation of aqueous extract of Heracleum persicum L. with nanochitosan to increase the shelf life and improve the sensory properties of shrimp during refrigeration.

 In order to coat shrimp samples, nanochitosan with extract of Heracleum persicum L. 1.5-3% was used freely and finely coated and the effects of different coatings were prepared for microbial, chemical and sensory evaluation of shrimp during 16 Day in refrigerator. The aqueous extract of Heracleum persicum L.  was prepared, and in the next stage, the free aqueous extract became nanoliposomes.

 The results of this study showed that encapsulation increases the antioxidant, antibacterial and sensory properties of the extract. Nanochitosan coatings containing encapsulation of aqueous extract of Heracleum persicum L. can effectively prevent microbial growth and chemical spoilage at low pH and the results of peroxide measurements thiobarbituric acid measurements and total volatile nitrogen measurements (P <0/05).

Nanochitosan containing aqueous extract of finely coated Heracleum persicum L. extract in comparison with the control treatments, nanochitosan and nanochitosan containing aqueous extract of Heracleum persicum L.  showed the most significant effect on the chemical, bacteriological and sensory properties of coated shrimp during the experimental period. Therefore, the form of nanochitosan containing aqueous extract of 3% finely coated Heracleum persicum L. can be used as a suitable coating to increase food in the food industry.