Read e-book online Emulsifiers in Food Technology PDF

By Robert J. Whitehurst

Emulsifiers are crucial elements of many commercial nutrients recipes, whether or not they be additional for the aim of water/oil emulsification in its easiest shape, for textural and organoleptic amendment, for shelf existence enhancement, or as complexing or stabilising brokers for different parts comparable to starch or protein.

Each bankruptcy during this quantity considers one of many major chemical teams of foodstuff emulsifiers. inside of every one workforce the constructions of the emulsifiers are thought of, including their modes of motion. this can be by means of a dialogue in their construction / extraction and actual features, including useful examples in their program. Appendices cross-reference emulsifier varieties with functions, and provides E-numbers, foreign names, synonyms and references to analytical criteria and techniques.

This is a booklet for nutrients scientists and technologists, constituents providers and caliber coverage body of workers.

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The consumer prefers baked goods fresh from the oven, but with conventional methods this cannot always be fully achieved. Today the baking industry has the means to interrupt the fermentation process by deep-freezing technologies, thus offering semifinished products that are then finally prepared just in time for consumption. In practice, this means that yeast doughs are frozen after shaping. The freezing process, however, bears one risk: through the ice crystal formation the sensitive gluten network of the dough, as well as the cell membranes of the yeast cells, may be physically damaged by the sharp crystal structure.

In general, we can differentiate between what could be called an ‘in-line process’ and a kind of ‘post-process’ lecithination. A typical in-line process is the production of whole milk powder. It starts with a highly concentrated liquid milk that by means of spray drying is initially transformed into very fine powder. At the exit of the spray tower, this powder lecithins 31 is then transferred to fluid bed systems. In these fluid beds, three processes take place: by means of hot air, residual moisture is removed from the powder.

The major breakthrough, however, was the application of mono- and diglycerides in the 1930s in the margarine industry on a large scale [2]. High ratio shortenings were introduced, which contained mono- and diglycerides that brought about finer dispersions of fat particles in the dough, giving strengthened cake batters. In 1936, the use of mono- and diglycerides was patented for ice cream applications. Nowadays, the total world production of emulsifiers is estimated to be in the order of 300,000 metric tons.

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