Escherichia coli FTIR History of engineering & technology Technology: general issues acid-soluble collagen almond flour aqueous extraction process bioactive peptides biosynthesis cream demulsification denaturation temperature enzymatic hydrolysis enzyme-assisted aqueous extraction expeller pressing extraction yields fish skin food proteins hydrolysates hypertension induction time life cycle assessment microbial novel extraction methodologies oil recovery peptides pinene rancidity rancimat response surface methodology seeds