Download Modifying Lipids for Use in Food by Frank D. Gunstone PDF

By Frank D. Gunstone

Oils and fat have a massive influence at the dietary and sensory caliber of many meals. foodstuff brands needs to usually regulate lipid elements or constituents in foodstuff to accomplish the precise stability of actual, chemical and dietary homes. editing lipids to be used in meals reports the diversity of lipids on hand, options for his or her amendment and the way they are often utilized in nutrients items. half 1 reports vegetable, animal, marine and microbial resources of lipids and their constitution. the second one a part of the publication discusses the variety of innovations for enhancing lipids similar to hydrogenation, fractionation and interesterification. ultimately, half three considers the wide variety of purposes of converted lipids in such components as dairy and bakery items, confectionary and frying oils. With its individual editor and overseas diversity of members, enhancing lipids to be used in meals should be a typical reference for dairy and different brands utilizing converted lipids.

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Extra resources for Modifying Lipids for Use in Food

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This triene acid is easily oxidized, and food products with linolenic acid have a short shelf life, which is a matter of concern for the food industry, the retailer, and the consumer. However, there is also a matter of nutritional concern. 5) at levels exceeding 20:1 in some countries are far too high and that values of 5:1 or lower (Crawford, 2004) are desirable. It has been argued (Gunstone, 2005) that, compared with nutritional recommendations, the agricultural supply industry as a whole (plant and animal) provides too much linoleic acid and too little linolenic acid.

Species also differ considerably in the distribution of fat deposits. Summarized data from various studies show that in young bulls of about 550 kg live weight internal fat makes up 25–30 % of total fat, subcutaneous fat 15–20 %, intermuscular fat 50–55 %, and intramuscular fat 2–3 %. For barrows of 100 kg live weight the respective figures are 5, 70–75, 20, and 1–2 % (Goutefongea and Dumont, 1990), which means that the major fat depot in pigs is subcutaneous fat while in cattle it is internal fat.

With its low level of saturated acids, its high level of oleic acid and the presence of linoleic and linolenic acids at a favourable ratio (~ 2:1) rapeseed oil rates highly in the classification of healthy oils. Also, the plant system lends itself to genetic modification, and rapeseed varieties with modified fatty acid composition have been developed, although it is still not clear how many of these will be economically viable. Rapeseed oils with less linolenic acid, or enhanced levels of lauric acid, stearic acid, oleic acid, or with unusual acids such as g-linolenic acid, ricinoleic acid or vernolic acid have all been developed for commercial exploitation.

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