This invention relates to lysine isotopologues of Formulas I and 1-A, as described herein, and processes for synthesizing the same and derivatives and intermediates involved therein. In one aspect, described herein is a chemical compound comprising an isotopically labeled analog, i.e., an isotopologue of a standard or naturally occurring lysine. The lysine isotopologue is synthetically formed to have stable isotopes of elements incorporated at selected positions. As such, the lysine isotopologue has a molecular mass different from the mass of a standard or naturally occurring lysine.

A keratin hydrolysate including at least 94% by weight of free amino acids relative to the total weight of the amino acids of the hydrolysate. The keratin hydrolysate includes at least 93% of free valine relative to the total weight of valine in the hydrolysate, at least 90% free isoleucine relative to the total weight of isoleucine in the hydrolysate, and at least 95% of free leucine relative to the total weight of leucine in the hydrolysate. A method for producing the keratin hydrolysate, a composition comprising the hydrolysate and an animal feed containing the hydrolysate are also disclosed.

The invention relates to a protein material includes angiogenin and/or angiogenin hydrolysate in an amount of 2 to 15 mg/100 mg, and lactoperoxidase and/or lactoperoxidase hydrolysate, in the mass ratio to angiogenin and/or angiogenin hydrolysate of 0.3 to 20.

The invention relates to a protein material includes angiogenin and/or angiogenin hydrolysate in an amount of 2 to 15 mg/100 mg, and lactoperoxidase and/or lactoperoxidase hydrolysate, in the mass ratio to angiogenin and/or angiogenin hydrolysate of 0.3 to 20.

The present invention relates to a new crystal modification of N-(aminoiminomethyl)-2-aminoacetic acid as well as a method for producing this crystal modification.

Provided are fish food compositions that include 40-70 wt. % cereal flour, 15-30 wt. % meal from aquatic animals, 10-20 wt. % extraction meal, 0.01-0.40 wt. % pepper, and 0.1-1.0 wt. % free methionine. Also provided are methods for using the fish food compositions as a fish food for ornamental fish.

Provided are fish food compositions that include 40-70 wt. % cereal flour, 15-30 wt. % meal from aquatic animals, 10-20 wt. % extraction meal, 0.01-0.40 wt. % pepper, and 0.1-1.0 wt. % free methionine. Also provided are methods for using the fish food compositions as a fish food for ornamental fish.

The invention relates to a method for enriching protists with lipids rich in polyunsaturated fatty acids (PUFA) in particular of the omega 3 (ω3) class, said method comprising the culture of protists in a culture medium comprising a selenium-containing compound as well as the protists enriched with lipids rich in PUFA obtained by this method.

The invention also relates to a method for producing lipids rich in PUFA, comprising, after the enrichment method according to the invention, a method for treating the protists by extraction from the biomass of selenium-containing lipids rich in PUFA.

The invention finally relates to any food, cosmetic or pharmaceutical product comprising either selenium-containing lipids thus extracted, or selenium-containing biomass originating from the enrichment method.

The present disclosure is directed to an animal food product for promoting dental efficacy including a hydrolyzed protein including one or more amino groups, and a high amylopectin content starch including one or more reducing sugars; wherein the one or more amino groups in the hydrolyzed protein are covalently bonded to the one or more reducing sugars in the high amylopectin content starch. Methods of preparing the animal food product and using the animal food product to promote dental efficacy, such as teeth-cleaning efficacy in an animal are also provided.

An animal feed composition includes: 5 to 60 weight % protein relative to the dry weight of the composition, which comprises protein obtained from the family of the duckweeds (Lemnaceae), 0.5 to 65 weight % carbohydrates relative to the dry weight of the composition; and 0.001 to 5 weight % fiber relative to the dry weight of the composition.