Feed additive including sodium carbonate feed additive polyphenol particles can be fed to animals to reduce methane or carbon dioxide emission. The feed additive polyphenol particles can be prepared by reacting phenols with sodium percarbonate (2Na.sub.2CO.sub.3.3H.sub.2O.sub.2) in a solution of water, a peroxidase and a dispersing agent. The sodium percarbonate can be dissolved in the water solution to generate sodium and carbonate ions, which can be incorporated to the polyphenol particles for assisting the animals in digesting the feed additive. The dispersing agent can be used to limit the sizes of the particles to facilitate the consumption of the feed additive by the animals.

Feed additive including sodium carbonate feed additive polyphenol particles can be fed to animals to reduce methane or carbon dioxide emission. The feed additive polyphenol particles can be prepared by reacting phenols with sodium percarbonate (2Na.sub.2CO.sub.3.3H.sub.2O.sub.2) in a solution of water, a peroxidase and a dispersing agent. The sodium percarbonate can be dissolved in the water solution to generate sodium and carbonate ions, which can be incorporated to the polyphenol particles for assisting the animals in digesting the feed additive. The dispersing agent can be used to limit the sizes of the particles to facilitate the consumption of the feed additive by the animals.

A lutein microcapsule formulation and preparation method thereof, the formulation comprising the following ingredients: lutein crystals, a water-soluble emulsifier, an oil-soluble antioxidant, a wall material, a filler, a water-soluble antioxidant, and purified water. The preparation method comprises: dissolving the lutein crystals and the oil-soluble antioxidant in the water-soluble emulsifier to obtain an oil phase; adding the wall material, the water-soluble antioxidant, and the filler to the purified water to obtain a water phase; adding the oil phase to the water phase, grinding to obtain a particle size of the liquid emulsion of less than 100 nm, and granulating.

A lutein microcapsule formulation and preparation method thereof, the formulation comprising the following ingredients: lutein crystals, a water-soluble emulsifier, an oil-soluble antioxidant, a wall material, a filler, a water-soluble antioxidant, and purified water. The preparation method comprises: dissolving the lutein crystals and the oil-soluble antioxidant in the water-soluble emulsifier to obtain an oil phase; adding the wall material, the water-soluble antioxidant, and the filler to the purified water to obtain a water phase; adding the oil phase to the water phase, grinding to obtain a particle size of the liquid emulsion of less than 100 nm, and granulating.

Palatable food products are provided with low bulk density of about 4-12 lb/ft.sup.3 and comprise an expanded matrix of intercommunicated pores defined by a skeletal structure of gelatinized starch. The products produce an audible crunch sound when crushed by applied force and include low calorie, energy-dense characteristics of about 2-6 Kcal/g. The total weight of the product comprises about 20-60% starch, about 30% or less flowable fat, about 2-12% water, and a coating of flavorants and/or aromants. The product can optionally comprise health promoting ingredients. The products are manufactured by extruding batched ingredients including starch and water under processing conditions to promote starch gelatinization to form a substantially homogenous dough that, after extrusion, expands into a porous matrix. The porous matrix can undergo vacuum infusion to fill the matrix with flowable fat, dry palatant, and wet palatant. After infusion, the porous matrix can be dust coated with dry palatant.

Palatable food products are provided with low bulk density of about 4-12 lb/ft.sup.3 and comprise an expanded matrix of intercommunicated pores defined by a skeletal structure of gelatinized starch. The products produce an audible crunch sound when crushed by applied force and include low calorie, energy-dense characteristics of about 2-6 Kcal/g. The total weight of the product comprises about 20-60% starch, about 30% or less flowable fat, about 2-12% water, and a coating of flavorants and/or aromants. The product can optionally comprise health promoting ingredients. The products are manufactured by extruding batched ingredients including starch and water under processing conditions to promote starch gelatinization to form a substantially homogenous dough that, after extrusion, expands into a porous matrix. The porous matrix can undergo vacuum infusion to fill the matrix with flowable fat, dry palatant, and wet palatant. After infusion, the porous matrix can be dust coated with dry palatant.

The invention relates to a coloring additive for food or feed, comprising a water extract of sweet chestnut wood comprising sweet chestnut tannins. The additive can be in granular or liquid form. The amount of tannins in the sweet chestnut wood extract is about 40 wt % or more, preferably 40 to 60 wt % expressed as total polyphenols, calculated on dry matter. The coloring additive is a.o. suitable as replacement of caramel color class IV in soft drinks.

The invention relates to a coloring additive for food or feed, comprising a water extract of sweet chestnut wood comprising sweet chestnut tannins. The additive can be in granular or liquid form. The amount of tannins in the sweet chestnut wood extract is about 40 wt % or more, preferably 40 to 60 wt % expressed as total polyphenols, calculated on dry matter. The coloring additive is a.o. suitable as replacement of caramel color class IV in soft drinks.

A method of rearing an aquaculture shrimp includes keeping shrimps in a land-farming nursery, and feeding to the shrimps kept in the land-farming nursery a feed including astaxanthin in an amount of 50 ppm or greater.

A method of rearing an aquaculture shrimp includes keeping shrimps in a land-farming nursery, and feeding to the shrimps kept in the land-farming nursery a feed including astaxanthin in an amount of 50 ppm or greater.