title: Enhancing the recovery of tiger nut (Cyperus esculentus) oil by mechanical pressing: Moisture content, particle size, high pressure and enzymatic pre-treatment effects.
abstract: Tiger nut (Cyperus esculentus) tuber contains oil that is high in monounsaturated fatty acids, and this oil makes up about 23% of the tuber. The study aimed at evaluating the impact of several factors and enzymatic pre-treatment on the recovery of pressed tiger nut oil. Smaller particles were more favourable for pressing. High pressure pre-treatment did not increase oil recovery but enzymatic treatment did. The highest yield obtained by enzymatic treatment prior to mechanical extraction was 33% on a dry defatted basis, which represents a recovery of 90% of the oil. Tiger nut oil consists mainly of oleic acid; its acid and peroxide values reflect the high stability of the oil.
authors.affiliation: Department of Food and Nutritional Sciences, University of Reading, Whiteknights, PO Box 226, Reading RG6 6AP, United Kingdom. Electronic address: o.a.ezeh@pgr.reading.ac.uk.
authors.forename: Onyinye
authors.initials: O
authors.lastname: Ezeh
authors.affiliation: Department of Food and Nutritional Sciences, University of Reading, Whiteknights, PO Box 226, Reading RG6 6AP, United Kingdom.
authors.forename: Michael H
authors.initials: MH
authors.lastname: Gordon
authors.affiliation: Department of Food and Nutritional Sciences, University of Reading, Whiteknights, PO Box 226, Reading RG6 6AP, United Kingdom.
authors.forename: Keshavan
authors.initials: K
authors.lastname: Niranjan
mesh_terms: D029786:Cyperus / Q000737:chemistry*; D009754:Nuts / Q000737:chemistry*; D009821:Oils / Q000737:chemistry*; D010316:Particle Size; D059808:Polyphenols / Q000737:chemistry*; D011312:Pressure
chemical_list: D009821:Oils; D059808:Polyphenols
keywords: Enzymes; Particle size; Polyphenol; Pressing; Tiger nut oil