Natural Food Preservatives
Polylysine Introduction Polylysine (ε-poly-L-lysine) is a natural food preservative produced through natural fermentation using the bacteria Streptomyces and more specifically Streptomyces albulus under aerobic conditions . Polylysine consists as a small natural homo-polymer (25-30 L-lysine residues) of the essential amino acid, L-lysine. Its application includes cakes, rice, cheese and other dairy foods and meats. A dvantages 1. Broad antibacterial spectrum: it has obvious inhibition to gram-positive bacteria and gram-negative bacteria, yeast, mould, virus and many other micro-organisms. 2. Good thermal stability: below high temperature ( 120 o C for 20 min ) . Polylysine does not decompose, nor experience inactivation, and is suitable for cooked food. 3. Good water-solubility: Polylysine has good water-solubility, Polylysine spreads evenly in food; colorless, odorless and natural, does not affect overall food flavor. 4. Wide pH range: broad anti-bacterial spectrum (pH 2 to 9), to supplement the weakness with most common preservatives; poor effects in neutral and alkaline conditions. 5. Strong blends: As a natural preservative, ε- PL can be used alone. In addition, it has a synergistic effect when blending with Potassium Sorbate, Citric acid, Malic Acid, Glycine and Nisin. After blending, its bactericidal action will be improved greatly. 6. Safe for human consumption: after eating, Polylysine does not accumulate inside the human body. It partly breaks down into L-lysine, an essential amino acid for human health. L –lysine is non-toxic, and known as th e "pharmaceutical & nutrient preservative". 7. Health function: Recent studies show that ε-Polylysine can inhibit the enzyme activity and the fat absorption in the small intestine ester, has curative effect against, with obesity. A pplication in Food Food Type Recommend Usage (U.S.A.) Cooked product sausages 100—250mg/kg Ham 100—250mg/kg Fresh meat Cold fresh 200—400mg/kg ( surface treatment ) Frozen meat 200—400mg/kg ( surface treatment ) Beverage Pure water 50—100mg/L Fruit drink 100—200mg/L Protein beverage 100—200mg/L Water-based seasonings drinks 100—200mg/L Tea , coffee , herbal drink 100—200mg/L Seafood Fresh aquatic product 200—400mg/kg ( surface treatment ) Frozen seafood and product 200—400mg/kg ( surface treatment ) Prefabrication of aquatic products 150—300mg/kg Cooked aquatic products 150—300mg/kg Bakery Bread 100—200mg/kg Asian pastry 150—250mg/kg This is putting the sample room This is office building This is research and development centre This is research office This is ISO9001-2008 quality management system















