CHARACTERIZATION OF ENZYME-ASSISTED COLD-PRESSED COTTONSEED OIL

Journal of Food Lipids Pub Date : 2007-11-21 DOI:10.1111/j.1745-4522.2007.00097.x

SAJID LATIF, FAROOQ ANWAR, MUHAMMAD ASHRAF

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引用次数: 25

Abstract

ABSTRACT

Physicochemical properties of enzyme-assisted cold-pressed oils from seeds of cotton (Gossypium hirsutum), using five commercial enzymes (Phytezyme, Allzyme, Natuzyme, Kemzyme and Feedzyme), were compared with those of the control (without enzyme) and solvent-extracted oils. Enzyme-extracted cottonseed oil yield ranged from 9.70 to 12.89%, which was significantly (P < 0.05) higher than that of the control (8.50%). No significant (P > 0.05) variation in the protein, fiber and ash contents was observed in all extracted oilseed residues. The saponification value, unsaponifiable matter, free fatty acid content, specific extinctions at 232 and 270 nm, and peroxide and p-anisidine values of the enzyme-extracted oils were lower than those of solvent-extracted oils but comparable with those of the control. The fatty acid composition of the control, enzyme- and solvent-extracted cottonseed oils revealed no significant (P > 0.05) variation with regard to the constituent fatty acid contents. However, the enzyme-extracted oils had relatively lower levels of stearic acid. When compared with the control, the α-tocopherol content was high in the Phytezyme-, Natuzyme- and Feedzyme-extracted oils; nevertheless, it was comparable with those in solvent-extracted oils. The level of γ-tocopherol in enzyme-extracted oils was comparable with the control, but generally higher than that in the solvent-extracted oils.

PRACTICAL APPLICATIONS

Enzyme-assisted cold pressing is very effective in enhancing the oil yield, with better quality of end-use products and involves lower capital investment than that of solvent extraction. Commercial enzymes were used in this study and the proposed enzyme-assisted extraction method will be beneficial for the local vegetable oilseed extraction sector and may offer valuable by-products for food and feed applications.

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酶辅助冷榨棉籽油的表征

摘要采用5种商品酶(Phytezyme、Allzyme、Natuzyme、Kemzyme和Feedzyme)对棉籽冷榨油的理化性质进行了比较，并与不加酶的对照油和溶剂萃取油进行了比较。酶提棉籽油得率为9.70% ~ 12.89%，显著高于对照组(8.50%)(P < 0.05)。各提取油籽渣的蛋白质、纤维和灰分含量均无显著差异(P > 0.05)。酶提油的皂化值、不皂化物、游离脂肪酸含量、232和270 nm的比消光值、过氧化物值和对茴香胺值均低于溶剂提油，但与对照相当。对照棉籽油、酶提棉籽油和溶剂提棉籽油的脂肪酸组成差异不显著(P > 0.05)。然而，酶萃取油的硬脂酸含量相对较低。与对照相比，Phytezyme-、Natuzyme-和feedzyme -提取油中α-生育酚含量较高;然而，它与溶剂萃取油相当。酶提油中γ-生育酚的含量与对照相当，但普遍高于溶剂提油。酶辅助冷压在提高油收率方面非常有效，最终产品质量更好，并且比溶剂萃取的资本投资更低。本研究使用了商业酶，提出的酶辅助提取方法将有利于当地植物油籽提取行业，并可能为食品和饲料应用提供有价值的副产品。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Food Lipids 工程技术-食品科技

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