Soy molasses
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Soy molasses is brown
viscous The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inter ...
syrup with a typical bittersweet flavor. A
by-product A by-product or byproduct is a secondary product derived from a production process, manufacturing process or chemical reaction; it is not the primary product or service being produced. A by-product can be useful and marketable or it can be consid ...
of aqueous
alcohol Alcohol most commonly refers to: * Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom * Alcohol (drug), an intoxicant found in alcoholic drinks Alcohol may also refer to: Chemicals * Ethanol, one of sev ...
soy protein concentrate production, soy molasses is a concentrated, desolventized, aqueous alcohol extract of defatted
soybean The soybean, soy bean, or soya bean (''Glycine max'') is a species of legume native to East Asia, widely grown for its edible bean, which has numerous uses. Traditional unfermented food uses of soybeans include soy milk, from which tofu an ...
flakes. The term "soy molasses" was coined by Daniel Chajuss, the founder of Hayes Ashdod Ltd., which first commercially produced and marketed soy molasses in the early 1960s. The name was intended to distinguish the product from “soybean whey” or “condensed soybean solubles”, the by-products available at the time from soy protein isolate and acid washed soy protein concentrate production.


Manufacture

The alcohols are removed from the liquid extract by evaporation and the distillation residue is an aqueous solution of the sugars and other soy solubles. This solution is concentrated to viscous honey-like consistency to yield soy molasses.


Composition

Typically, soy molasses contains 50% total soluble solids. These solids consist of carbohydrates (60%), proteins and other nitrogenous substances (10%), minerals (10%), fats and lipoids (20%). The major constituents of soy molasses are sugars that include
oligosaccharide An oligosaccharide (/ˌɑlɪgoʊˈsækəˌɹaɪd/; from the Greek ὀλίγος ''olígos'', "a few", and σάκχαρ ''sácchar'', "sugar") is a saccharide polymer containing a small number (typically two to ten) of monosaccharides (simple sugar ...
s ( stachyose and
raffinose Raffinose is a trisaccharide composed of galactose, glucose, and fructose. It can be found in beans, cabbage, brussels sprouts, broccoli, asparagus, other vegetables, and whole grains. Raffinose can be hydrolyzed to D-galactose and sucrose by ...
), disaccharides (sucrose) and minor amounts of monosaccharides (fructose and glucose). Minor constituents include saponins, protein, lipid, minerals (ash), isoflavones, and other organic materials.


Use

Soy molasses is used as a feed ingredient in mixed feeds as pelleting aid, added to soybean meal (e.g. by spraying it into the soybean meal desolventizer toaster), mixed with soy hulls, and used in liquid animal feed diets. Soy molasses can be used as a
fermentation Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes. In biochemistry, it is narrowly defined as the extraction of energy from carbohydrates in the absence of oxygen. In food ...
aid, as a prebiotic, and as an ingredient in specialized breads. It is also possible to burn soy molasses in a dedicated boiler to generate
process steam A process is a series or set of activities that interact to produce a result; it may occur once-only or be recurrent or periodic. Things called a process include: Business and management *Business process, activities that produce a specific se ...
. In combination with a support fuel (e.g. natural gas, ...) the low calorific liquid can be valorized in a steam boiler. Soy molasses is an important commercial and biological product, and a source of phytochemicals and soy sugars.


References

* Daniel Chajuss, Soy Molasses: Processing and Utilization as a Functional Food, in KeShun Liu, Editor, ''Soybeans as Functional Foods and Ingredients,'' AOCS Press, Champaign. Ill., USA, pp. 201–208, 2004. {{Soy, state=collapsed Food ingredients Soy-based foods